JP2004038765A - Method and system for estimating operational state of specific electrical equipment, method and system for confirming safety of electricity consumer house resident, and electrical equipment having harmonic signal injector - Google Patents

Method and system for estimating operational state of specific electrical equipment, method and system for confirming safety of electricity consumer house resident, and electrical equipment having harmonic signal injector Download PDF

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JP2004038765A
JP2004038765A JP2002197438A JP2002197438A JP2004038765A JP 2004038765 A JP2004038765 A JP 2004038765A JP 2002197438 A JP2002197438 A JP 2002197438A JP 2002197438 A JP2002197438 A JP 2002197438A JP 2004038765 A JP2004038765 A JP 2004038765A
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harmonic
current
power consumer
harmonic current
voltage
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JP4084966B2 (en
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Yukio Nakano
中野　幸夫
Kimihide Sawabe
澤邉　公秀
Saburo Nagaie
永家　三郎
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Central Research Institute of Electric Power Industry
Kyushu Electric Power Co Inc
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Central Research Institute of Electric Power Industry
Kyushu Electric Power Co Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To confirm safety of an electricity consumer house resident nonintrusively with a simple configuration. <P>SOLUTION: A system for confirming safety of an electricity consumer house resident has a harmonic signal injector 6 which is installed on a specific electrical equipment among the electrical equipment 3 in an electricity consumer house 2 and passes characteristic harmonic electrical currents through an interior wiring circuit 17 in the electricity consumer house 2, a nonintrusive type monitoring system 1 which determines from a total load current and voltage measured in the vicinity of a feed line lead-in port of the electricity consumer house 2 phase differences to the currents and voltages in fundamental and harmonic waves of the total load current and estimates an operational state of a specific electrical equipment based on the determined phase differences to the currents and voltages in the fundamental and harmonic waves of the total load current, and a notification means 14 for notifying the result of estimating by the nonintrusive type monitoring system 1 to a safety information management means 15 for managing the result information of estimating by the nonintrusive type monitoring system or to an information terminal 16 corresponding to the resident. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、特定電気機器の動作状態推定方法及びシステム並びに電力需要家在室者の安否確認方法及びシステム並びに高調波信号注入装置を備えた電気機器に関する。さらに詳述すると、本発明は、電力需要家の家屋内に入らない非侵入的な方法で、特定の電気機器の動作状態を推定する方法及びシステム、並びに当該推定方法及びシステムを応用して当該電力需要家の在室者の安否を確認する方法及びシステム、並びにこれらの方法及びシステムに用いる高調波信号注入装置を備えた電気機器に関する。
【０００２】
【従来の技術】
従来、電気機器の動作状態を非侵入的に推定するモニタリングシステムが提案されている（特開２０００−２９２４６５号公報参考）。このモニタリングシステムでは、電力需要家において設置されている電気機器が発生する高調波電流のパターンに着目し、給電線引込口付近で測定される総負荷電流と電圧から、総負荷電流の基本波並びに高調波の電流及び電圧に対するそれらの位相差を求め、そのパターンから屋内で使用されている電気機器と電気機器個別の動作状態を推定するようにしている。
【０００３】
一方、一人暮らしの老人や身体障害者等の安否を遠距離監視可能な生活モニターシステムに関する技術が提案されている（特開２００２−７８０３４号公報参考）。この生活モニターシステムは、電気製品（例えば電気ポット）の操作または動作を検出するとともに送信先等の情報を記憶した監視ユニット、および、当該監視ユニットによって検出した情報を通信網を介して家庭外に送信する送信手段と、前記送信手段から前記電気製品の情報を受信し、多数の監視対象者の情報を一元管理する情報蓄積手段と、前記情報蓄積手段の蓄積情報を表示可能に加工する加工手段と、前記加工手段によって加工したデータを外部から閲覧可能に表示する表示手段とを備えている。
【０００４】
【発明が解決しようとする課題】
しかしながら、特開２０００−２９２４６５号公報に開示されたモニタリングシステムでは、同一あるいは類似の高調波電流を発生する複数の電気機器が接続されている場合、そのうちの特定の電気機器の動作状態を一意に確定的に弁別することは困難である。
【０００５】
また、特開２００２−７８０３４号公報に開示された生活モニターシステムでは、監視対象となる電気製品にマイクロコンピュータ等の情報処理機能や無線通信装置等の通信機能を付加または内蔵しなければならない。このため、電気製品自体をインテリジェント化する必要があり、コスト高となってしまう。また、電力需要家の屋内に接続された電気製品が、電力需要家外部の情報処理装置と通信を行なうことは、電力需要家在室者にとっては、第三者から常に監視されているようで心地の良いものではない。
【０００６】
そこで本発明は、同一あるいは類似の高調波電流を発生する複数の電気機器が電力需要家内に接続されている場合であっても、特定の電気機器の動作状態を非侵入的に推定できる方法及びシステムを提供することを目的とする。また、当該推定方法及びシステムを応用して、電力需要家在室者の安否を確認する方法及びシステムを提供することを目的とする。また、これらの方法及びシステムに用いる高調波信号注入装置を備えた電気機器を提供することを目的とする。
【０００７】
【課題を解決するための手段】
かかる目的を達成するため、請求項１記載の特定電気機器の動作状態の推定方法は、電力需要家内の特定の電気機器の動作に伴って、電力需要家内の電気機器が発生する高調波電流にはない特徴を有する高調波電流が電力需要家内の屋内配線回路に流れるようにし、電力需要家の給電線引込口付近で総負荷電流及び電圧を測定し、当該測定した総負荷電流及び電圧から当該総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差を求め、当該求めた総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差に基づいて特定電気機器の動作状態を推定するようにしている。
【０００８】
また、請求項２記載の特定電気機器の動作状態の推定システムは、電力需要家内の特定の電気機器に取り付けられて、特定電気機器の動作に伴い電力需要家内の電気機器が発生する高調波電流にはない特徴を有する高調波電流を電力需要家内の屋内配線回路に流す高調波信号注入装置と、電力需要家の給電線引込口付近で測定した総負荷電流及び電圧から当該総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差を求め、当該求めた総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差に基づいて特定電気機器の動作状態を推定する非侵入型モニタリングシステムとを有するようにしている。
【０００９】
したがって、特定電気機器の動作に伴って特徴的な高調波が屋内配線回路に流れる。当該特徴的な高調波は、総負荷電流の高調波成分及び電圧に対する高調波電流の位相差に特徴的な影響を与える。このため、電力需要家の給電線引込口付近で測定した総負荷電流及び電圧から当該総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差を求めれば、当該特徴的な高調波の有無に基づいて特定電気機器の動作状態を推定することができる。
【００１０】
また、請求項３記載の発明は、対象となる電力需要家の在室者の安否を確認する方法であり、電力需要家内の特定の電気機器の動作に伴って、電力需要家内の電気機器が発生する高調波電流にはない特徴を有する高調波電流が電力需要家内の屋内配線回路に流れるようにし、電力需要家の給電線引込口付近で総負荷電流及び電圧を測定し、当該測定した総負荷電流及び電圧から当該総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差を求め、当該求めた総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差に基づいて特定電気機器の動作状態を推定し、当該推定した結果を、在室者の安否情報を管理する手段または在室者に対応する予め定められた情報端末機に通知するようにしている。
【００１１】
また、請求項４記載の発明は、対象となる電力需要家の在室者の安否を確認するシステムであり、電力需要家内の特定の電気機器に取り付けられて、特定電気機器の動作に伴い電力需要家内の電気機器が発生する高調波電流にはない特徴を有する高調波電流を電力需要家内の屋内配線回路に流す高調波信号注入装置と、電力需要家の給電線引込口付近で測定した総負荷電流及び電圧から当該総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差を求め、当該求めた総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差に基づいて特定電気機器の動作状態を推定する非侵入型モニタリングシステムと、非侵入型モニタリングシステムの推定結果情報を管理する安否情報管理手段または在室者に対応する予め定められた情報端末機に、非侵入型モニタリングシステムの推定結果を通知する通知手段とを有するようにしている。
【００１２】
したがって、特定電気機器の動作に伴って特徴的な高調波が屋内配線回路に流れるので、当該特徴的な高調波の有無に基づいて特定電気機器の動作状態を推定できる。この推定結果は、安否情報管理手段または予め定められた情報端末機に通知される。在室者の安否確認を業として行う安否確認事業者または在室者の家族や担当医師等は、安否情報管理手段または情報端末機を用いて、特定電気機器の動作頻度、動作時間、動作時間帯等から在室者が健常に生活しているか否かを判断することができる。
【００１３】
また、請求項５記載の発明は、請求項４記載の電力需要家在室者の安否確認システムにおいて、高調波信号注入装置は、任意の次数の高調波電流を単一で又は組み合わせて発生させるようにしている。
【００１４】
したがって、一般の電気機器が発生する高調波電流にはない特徴的な高調波電流を発生させることができる。例えば、一般の電気機器が発生する高調波電流は、奇数次のものが卓越して現れ、偶数次のものは小さく、また３次、５次、７次といった次数のものまでが支配的であり、９次、１１次、１３次といった高次の高調波電流は総負荷電流に含まれる割合が頗る小さい。したがって、高調波信号注入装置が発生する高調波電流は、偶数次、或いは９次以上の奇数次のいずれかの周波数に合致するもの、あるいは偶数次と９次以上の奇数次との周波数の一部又は全部の組み合わせで構成されるものが好ましい。
【００１５】
また、請求項６記載の発明は、請求項４または５記載の電力需要家在室者の安否確認システムにおいて、高調波信号注入装置は、特定電気機器の電流取込部に電気的に接続するインターフェースと、屋内配線回路の電流供給部に電気的に接続するインターフェースとを有するようにしている。この場合、既存の特定電気機器と既存の屋内配線回路との間に高調波信号注入装置を取り付けるように構成できる。
【００１６】
また、請求項７記載の発明は、電力需要家内の屋内配線回路に接続されて使用される電気機器において、該電気機器の動作時に、電力需要家内の電気機器が発生する高調波電流にはない特徴を有する高調波電流を電力需要家内の屋内配線回路に流す高調波信号注入装置を備えるようにしている。したがって、この電気機器の動作に伴って特徴的な高調波が屋内配線回路に流れる。この特徴的な高調波の有無に基づいて当該電気機器の動作状態を推定することができ、更に当該推定結果に基づいて電力需要家在室者が健常に生活しているか否かを判断することができる。
【００１７】
【発明の実施の形態】
以下、本発明の構成を図面に示す実施形態に基づいて詳細に説明する。
【００１８】
図１から図７に本発明の電力需要家在室者の安否確認方法及びシステムの実施の一形態を示す。本発明の対象電力需要家の在室者の安否を確認する方法は、電力需要家内の特定の電気機器の動作に伴って、電力需要家内の電気機器が発生する高調波電流にはない特徴を有する高調波電流が電力需要家内の屋内配線回路に流れるようにし、電力需要家の給電線引込口付近で総負荷電流及び電圧を測定し、当該測定した総負荷電流及び電圧から当該総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差を求め、当該求めた総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差に基づいて特定電気機器の動作状態を推定し、当該推定した結果を、在室者の安否情報を管理する手段または在室者に対応する予め定められた情報端末機に通知するようにしたものである。
【００１９】
この電力需要家在室者の安否確認方法は、電力需要家在室者の安否確認システムとして装置化される。この電力需要家在室者の安否確認システムは、電力需要家２内の電気機器３のうち特定の電気機器３ｆに取り付けられて、特定電気機器の動作に伴い電力需要家２内の電気機器３が発生する高調波電流にはない特徴を有する高調波電流を電力需要家２内の屋内配線回路１７に流す高調波信号注入装置６と、電力需要家２の給電線引込口付近で測定した総負荷電流及び電圧から当該総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差を求め、当該求めた総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差に基づいて特定電気機器の動作状態を推定する非侵入型モニタリングシステム１と、非侵入型モニタリングシステム１の推定結果情報を管理する安否情報管理手段１５または在室者に対応する予め定められた情報端末機１６に、非侵入型モニタリングシステム１の推定結果を通知する通知手段１４とを有する。
【００２０】
本実施形態では、安否確認システムの対象となる電力需要家２の在室者を単に対象者と呼ぶ。対象者は例えば一人暮らしの老人（独居高齢者）や身体障害者等であり、本発明の安否確認システムにより、対象者の家族や担当医師等は対象者が健常に生活しているか否かを遠隔から確認することができる。
【００２１】
特定電気機器とは、高調波信号注入装置６が取り付けられる電気機器３である。この特定電気機器としては、例えば対象者の生活行動と密接に結びついて使用される電気機器３であって、当該電気機器３の動作頻度、動作時間、動作時間帯等から対象者が健常に生活しているか否かを推測できるものが好ましい。例えば本実施形態では、説明を簡単にするため、対象者の電力需要家２内の屋内配線回路１７（給電線下流）には、電気機器３として、テレビジョン受像機３ａ、冷蔵庫３ｂ、インバータエアコンデショナー３ｃ、蛍光灯３ｄ、白熱灯３ｅからなる居間照明機器、白熱灯３ｆからなるトイレ照明機器のみが接続されているものとし、白熱灯３ｆからなるトイレ照明機器を特定電気機器としている。屋内配線回路１７は、給電線（即ち、引込線４及び電柱５に架設された電線）を介して電気事業者等の電力系統に接続されている。尚、対象者の電力需要家２内の屋内配線回路１７に接続されている電気機器３は、本実施形態に例示したものに限定されないのは勿論である。また、本実施形態では、特定電気機器は白熱灯３ｆからなるトイレ照明機器のみの例について説明するが、特定電気機器は必ずしも単数に限らず複数あっても良い。
【００２２】
本実施形態の高調波信号注入装置６は、特定電気機器が電源オンの状態にあるときに、特徴的な高調波電流を屋内配線回路１７に流す装置である。本実施形態では、非侵入型モニタリングシステム１が、当該特徴的な高調波電流の有無から、特定電気機器が電源オンの状態にあるか否かを推定できるようにしている。
【００２３】
高調波信号注入装置６が発生する高調波電流（即ち交流電流の高調波成分）は、電力需要家２内の電気機器３（例えば本実施形態では、テレビジョン受像機３ａ、冷蔵庫３ｂ、インバータエアコンデショナー３ｃ、蛍光灯３ｄ、白熱灯３ｅからなる居間照明機器、白熱灯３ｆからなるトイレ照明機器）が発生する高調波電流にはない特徴を有するものとする。その特徴とは、例えば、高調波電流の次数、高調波電流の強さ、高調波電流の基本波電圧に対する位相差、またはこれらの組み合せとして表される。一般の電気機器３が発生する高調波電流は、奇数次のものが卓越して現れ、偶数次のものは小さく、また３次、５次、７次といった次数のものまでが支配的であり、９次、１１次、１３次といった高次の高調波電流は総負荷電流に含まれる割合が頗る小さい。したがって、高調波信号注入装置６が発生する高調波電流は、偶数次、或いは９次以上の奇数次のいずれかの周波数に合致するもの、あるいは偶数次と９次以上の奇数次との周波数の一部又は全部の組み合わせで構成されるものが好ましい。例えば本実施形態の高調波信号注入装置６では、特定電気機器が電源オンの状態にあるときに、１３次の高調波電流を０．５Ａで且つ基本波電圧に対して位相差０°で、屋内配線回路１７に流すようにしている。ただし、高調波信号注入装置６が発生する特徴的な高調波電流は、本実施形態の例に限定されるものではない。例えば、高調波信号注入装置６が発生する高調波電流の基本波電圧に対する位相差に、電力需要家２内の全ての電気機器３にはない特徴が表れるようにしても良い。また、電力需要家２内の電気機器３の動作に影響を及ぼさない範囲内において、高調波信号注入装置６が発生する高調波電流を１３次よりも更に高次のものとして、電力需要家２内の全ての電気機器３にはない特徴が表れるようにしても良い。
【００２４】
この高調波信号注入装置６は、特定電気機器（本実施形態では白熱灯３ｆ）と並列となるように屋内配線回路１７に取り付けても良く、または特定電気機器と直列となるように屋内配線回路１７に取り付けても良い。
【００２５】
並列型の高調波信号注入装置６は、例えば図６に示すように、任意の次数の高調波の電気信号を単一で又は組み合わせて発生させる信号発生部２５と、信号発生部２５から出力される電気信号を増幅させる電圧増幅部２６および電力増幅部２７と、スイッチ１８がオンの状態となったことを検出する電圧検出部２９と、電圧検出部２９からの出力信号に基づいて信号発生部２５および電圧増幅部２６および電力増幅部２７の動作を制御する制御部２８と、インピーダンス整合部３０とを有して構成される。インピーダンス整合部３０は、電力増幅部２７で増幅した信号電力を効率良く屋内配線回路１７に送り出すために、電力増幅部２７の出力インピーダンスと屋内配線回路１７のインピーダンスを同等に揃えるための回路である。
【００２６】
また、直列型の高調波信号注入装置６は、例えば図７に示すように、任意の次数の高調波の電気信号を単一で又は組み合わせて発生させる信号発生部２５と、信号発生部２５から出力される電気信号を増幅させる電圧増幅部２６および電力増幅部２７と、スイッチ１８がオンの状態となったことを検出する電流検出部３１と、電流検出部３１からの出力信号に基づいて信号発生部２５および電圧増幅部２６および電力増幅部２７の動作を制御する制御部２８と、生成された高調波電流を特定電気機器に流れる負荷電流に重畳させる信号混合部３２とを有して構成される。
【００２７】
ただし、高調波信号注入装置６の構成は、図６や図７に例示したものに限定されるものではない。例えば並列型の高調波信号注入装置６を、特定の周波数の交流電流を発生させる回路あるいは特定の周波数の交流電流を組み合せて発生させる回路と、電流増幅器等から構成しても良い。また、例えば直列型の高調波信号注入装置６を、基本波周波数ならびに低次の高調波周波数に対して低インピーダンスとなるような非線形素子を用いて、特定電気機器に流れる負荷電流の高次の高調波周波数領域に変歪を加え、特徴的な高調波パターンを発生させるように構成しても良い。並列型と直列型のどちらの高調波信号注入装置６も、スイッチ１８の操作により特定電気機器（本実施形態では白熱灯３ｆ）に電流が流れると、動作するように構成され、動作を開始した高調波信号注入装置６は、屋内配線回路１７に上述した特徴的な高調波電流を流す。この特徴的な高調波電流は、特定電気機器に流れる負荷電流に重畳される。
【００２８】
例えば本実施形態では、並列型の高調波信号注入装置６を採用している。また、本実施形態における並列型の高調波信号注入装置６は、特定電気機器の電流取込部（例えば電源プラグ或いは電源プラグに相当する部分）に電気的に接続するインターフェースと、屋内配線回路１７の電流供給部（例えばコンセント或いはコンセントに相当する部分）に電気的に接続するインターフェースとを有して構成される。この場合、高調波信号注入装置６を特定電気機器や屋内配線回路１７に組み込む必要はなく、既存の特定電気機器と既存の屋内配線回路１７との間に高調波信号注入装置６を簡単に取り付けることができる。
【００２９】
非侵入型モニタリングシステム１として、例えば本実施形態では、特開２０００−２９２４６５号に開示された電気機器モニタリングシステムを採用している。この非侵入型モニタリングシステム１によれば、電力需要家２において設置されている電気機器３が発生する基本波並びに高調波の電流とそれらの電圧に対する位相のパターンに着目し、ニューラルネットワーク等のパターン認識手法を応用することにより、給電線引込口付近での総負荷電流と電圧の測定結果からインバータ機器を含む複数の電気機器３の個別の動作状態を推定することができる。
【００３０】
ここで、白熱灯３ｆからなるトイレ照明機器は、その動作頻度、動作時間、動作時間帯等から対象者が健常に生活しているか否かを推測できる特定電気機器として好適ではあるが、他の電気機器３と比較して消費電力が小さく、しかも高調波をあまり出さないために、非侵入型モニタリングシステム１のみでは、白熱灯３ｆからなるトイレ照明機器の動作状態を精度良く識別することは困難である。また、本実施形態の電力需要家２内には白熱灯３ｅ，３ｆと２つあるが、特定の白熱灯３ｆの動作状態のみを識別するのは、非侵入型モニタリングシステム１のみでは困難である。そこで、本発明では、高調波信号注入装置６を用いることで、白熱灯３ｆからなるトイレ照明機器の動作状態を確実に識別できるようにしている。
【００３１】
また、本実施形態の非侵入型モニタリングシステム１によれば、特定電気機器の動作状態の推定のみならず、電力需要家２内の特定電気機器以外の電気機器３の個別の動作状態をも推定することができる。例えば、テレビジョン受像機３ａもまた、その動作頻度、動作時間、動作時間帯等から対象者が健常に生活しているか否かを推測できるものである。例えば本実施形態では、白熱灯３ｆからなるトイレ照明機器の動作情報に加えて、テレビジョン受像機３ａの動作情報をも得るようにしている。以下、本実施形態では、対象者の安否確認の判断対象となる特定電気機器を含む電気機器３を対象電気機器と呼ぶ。
【００３２】
この非侵入型モニタリングシステム１は、基本的には、測定センサーと、測定センサーで検出した測定データから基本波並びに高調波の電流とそれらの電圧に対する位相に関するデータを取り出すデータ抽出手段１２と、データ抽出手段１２からの前述のデータを基に当該電力需要家２が使用している電気機器３の動作状態を推定するパターン認識手段、例えばニューラルネットワーク１３とからなる。
【００３３】
ここで、上述した測定センサーは、電力需要家２の引込線４の引込口の付近に一箇所に設置している。このように測定センサーを引込口の付近に一箇所に設置する構成としたことにより、非侵入的なシステムとすることができる。この測定センサーは、具体的には、例えば引込口の付近の引込線４に電気的に並列接続されている計器用変成器（ＰＴ）と、同付近の引込線４に直列接続された計器用変流器（ＣＴ）とからなる。さらに具体的に説明すれば、前記ＰＴの一次側は、引込線４の電圧波形を測定できるように引込線４に並列に接続されている。同様に、ＣＴの一次側は、引込線４の電流波形を測定できるように引込線４に直列に接続されている。これらＰＴとＣＴの各二次側は、データ抽出手段１２の入力端子に接続されている。
【００３４】
上述したデータ抽出手段１２は、前記測定センサーであるＰＴ及びＣＴで検出した測定データから基本波並びに高調波の電流に関するデータと、電圧に対する基本波と高調波の電流の位相に関するデータとを取り出すことができる。このデータ抽出手段１２からの基本波並びに高調波の電流に関するデータと、電圧に対する基本波の電流（基本波電流とも呼ぶ）と高調波の電流（高調波電流とも呼ぶ）の位相に関するデータとが、上述したパターン認識手段の１つとしてのニューラルネットワーク１３に与えられる。
【００３５】
上述したニューラルネットワーク１３は、人間の脳の神経細胞を模倣した情報処理システムであり、いくつかの神経細胞（ニューロン）がシナプスと呼ばれる媒体を介して相互に結合して情報を交換しながら情報処理を行うようにした並列分散処理システムのことである。このニューラルネットワーク１３は、当該電力需要家２が使用しているインバータ機器を含む電気機器３の動作状態を推定する推定手段１３１を備えている。
【００３６】
この推定手段１３１には、まず、教師データを与えておく。この教師データとは、複数の電気機器３の種々の組み合わせと、それらの電気機器３の種々の動作状態の組み合わせについて、あらかじめ測定したいくつかの基本波と高調波の電流とそれらの電圧に対する位相に関するデータとその時の解答である電気機器３の動作状態とからなるデータのことをいう。また、この推定手段１３１は、電力需要家２の測定センサーによって測定した総負荷電流の高調波成分と位相に関するデータを入力することによって、パターン認識によってインバータ機器を含む複数の電気機器３の個別の動作状態を推定することができるようになっている。
【００３７】
図２に、非侵入型モニタリングシステム１の具体的構成例を示す。この図において、電力需要家２に引き込まれた引込線４が単相三線式である場合、日本の場合には、引込線４は、Ａ相４ａと中性線４ｎとの間で交流１００〔Ｖ〕、Ｂ相４ｂと中性線４ｎとの間で交流１００〔Ｖ〕、Ａ相４ａとＢ相４ｂとの間で２００〔Ｖ〕となる。Ａ相４ａと中性線４ｎとの間に、電流ＩＡ１，ＩＡ２，…，ＩＡ６を流し、電圧・電流の位相差φＡ１，φＡ２，…，φＡ６を持つ電気機器３が接続されている。同様に、Ｂ相４ｂと中性線４ｎとの間に、電流ＩＢ１，ＩＢ２，…，ＩＢ６を流し、電圧・電流の位相差φＢ１，φＢ２，…，φＢ６を持つ電気機器３が接続されている。そして、ＰＴ１１１ａの一次側は、Ａ相４ａと中性線４ｎとの間に接続されている。ＰＴ１１１ａの二次側には、Ａ相４ａの電圧と相似の電圧ＶＡ　が出力される。ＰＴ１１１ｂの一次側は、Ｂ相４ｂと中性線４ｎとの間に接続されている。ＰＴ１１１ｂの二次側には、Ｂ相４ｂの電圧と相似の電圧ＶＢ　が出力される。ＣＴ１１２ａ，１１２ｂには貫通型を使用するものとすると、ＣＴ１１２ａはＡ相４ａに流れる電流を測定して二次側からＡ相の電流と相似の電流ＩＡ　を出力し、また、ＣＴ１１２ｂはＢ相４ｂに流れる電流を測定して二次側からＢ相の電流と相似の電流ＩＢ　を出力する。ここで、電圧ＶＡとＩＡの位相関係はＡ相電圧とＡ相電流の位相関係に原理的に等しく、また、ＶＢとＩＢの位相関係もＢ相電圧とＢ相電流の位相関係に原理的に等しく保たれている。これら電圧ＶＡ　，ＶＢ　と、電流ＩＡ　，ＩＢ　は、データ抽出手段１２に入力される。
【００３８】
データ抽出手段１２は、アナログ／デジタル（Ａ／Ｄ）変換器１２１と、高速フーリエ変換器１２２とからなる。Ａ／Ｄ変換器１２１は電圧ＶＡ　，ＶＢ　と電流ＩＡ　，ＩＢ　とをデジタルデータに変換することができる。このＡ／Ｄ変換器１２１の出力は、高速フーリエ変換器１２２に与えられる。高速フーリエ変換器１２２は、前記Ａ／Ｄ変換器１２１からのデジタルデータから電流データＩＡ（１−１３），ＩＢ（１−１３）、位相差データφＡ（１−１３）　，φＢ（１−１３）を得ることができる。ここで、電流データＩＡ１，ＩＢ１、位相差データφＡ１，φＢ１はそれぞれ基本波の電流並びに位相差を示し、電流データＩＡ（２−１３）、ＩＢ（２−１３）、位相差データφＡ（２−１３）、φＢ（２−１３）は添字（２〜１３）が高調波の次数２次から１３次を表す高調波の電流と位相差とをそれぞれ示し、給電線に供給される交流電力の基本周波数にその次数の数値を乗ずることでその高調波のもつ周波数を表す。例えば、基本周波数が５０Ｈｚの場合、３次高調波電流とは１５０Ｈｚの周波数成分のみをもつ電流成分のことを指す。また、一般に、奇数次の高調波が卓越して現れ、偶数次のものは小さいため、ここでは２次から１３次のうち、奇数次のデータを高調波データとしてニューラルネットワーク１３に入力として与えている。
【００３９】
これらの基本波並びに高調波の電流データＩＡ（１−１３）、ＩＢ（１−１３）　、位相差データφＡ（１−１３）　，φＢ（１−１３）　の各データは、ニューラルネットワーク１３に与えられる。ニューラルネットワーク１３はあらかじめ教師データによって学習を終了している。学習は例えば次のようにして行う。即ち、図３に示す電力需要家２内の複数の電気機器３個々につけられたスイッチ１８〜２３を入り切りして、更にはインバータ機器の電流を任意に設定して（例えば、インバータエアコンデショナー３ｃなら室内設定温度や設定風速を変化させることで電流を変えることができる。）、複数の電気機器３が種々の動作状態となる状況を作る。当該状況のそれぞれについて、即ち複数の電気機器３の種々の動作状態の各組み合わせについて、測定センサーであるＰＴ１１１ａ，１１１ｂ及びＣＴ１１２ａ，１１２ｂとデータ抽出手段１２とを用いて、基本波電流と高調波電流とそれら基本波電流と高調波電流の基本波電圧に対する位相に関するデータを測定する。当該測定したデータと、当該測定したデータに対応する状況における電気機器３の動作状態（即ち、各電気機器３の電源がオンの状態であったかオフの状態であったか、更に電源オンの状態であればどの程度（何ワット）の電力を消費しているか）とを、教師データとしてニューラルネットワーク１３に与えて学習を行う。
【００４０】
例えば、白熱灯３ｆからなるトイレ照明機器以外の電気機器３（テレビジョン受像機３ａ、冷蔵庫３ｂ、インバータエアコンデショナー３ｃ、蛍光灯３ｄ、白熱灯３ｅからなる居間照明機器）が稼働したときの基本波並びに高調波の電流パターンと基本波電圧に対するそれらの位相差パターンは、例えば図４に示すようなものとして得られる。また、例えば白熱灯３ｅからなる居間照明機器以外の電気機器３（テレビジョン受像機３ａ、冷蔵庫３ｂ、インバータエアコンデショナー３ｃ、蛍光灯３ｄ、白熱灯３ｆからなるトイレ照明機器）が稼働したときの基本波並びに高調波の電流パターンと基本波電圧に対するそれらの位相差パターンは、例えば図５に示すようなものとして得られる。尚、図４と図５において、横軸には電流の次数を、縦軸には電流値〔Ａ〕及び位相差をそれぞれ示している。また、電流値は各次数の実効値、位相差は正弦関数値で表している。基本波および各高調波次数の電流値は太線で棒状に、位相差は細線で示している。ここで、各電流値及び位相差は情報のもつ重みを均等化するために０から１の範囲あるいは−１から１の範囲に正規化することが好ましい。
【００４１】
図４と図５の１３次の高調波電流に表れる電流の大きさと位相差の差が高調波信号注入装置６の動作の有無に起因しているものである。非侵入型モニタリングシステム１では、このようなパターンの差異を認識し、当該差異から特定電気機器を含む電気機器３の動作状態を、一意に確定的に識別することができる。
【００４２】
このように図４や図５に示すような複数の電気機器３を種々の動作状態の組み合わせで動作させたときに得られるデータと、その時の解答である電気機器３の動作状態とを教師データとしてニューラルネットワーク１３に与えて、ニューラルネットワーク１３を学習させておく。なお、教師データはこの例で示したものに限定されないのは勿論であり、適当な電気機器３の組み合わせ、適当な動作状態の組み合わせの時のデータをいくつか用意すればよい。
【００４３】
このようにしてニューラルネットワーク１３を教師データで学習させた後に、実際に、図１に示すように電力需要家２の特定電気機器の動作状態を非侵入的に測定することになる。尚、この非侵入型モニタリングシステム１では、ニューラルネットワーク１３による推定精度を向上させるための学習を、電力需要家２の外部から電話回線、光ファイバー専用回線等を利用して外部から行うことができる。
【００４４】
本実施形態の通知手段１４は、非侵入型モニタリングシステム１の推定結果として特定電気機器の動作情報を、安否情報管理手段１５または予め定められた情報端末機１６に送信する装置である。さらに本実施形態の通知手段１４は、非侵入型モニタリングシステム１の推定結果として特定電気機器以外の電気機器３である例えばテレビジョン受像機３ａの動作情報をも、安否情報管理手段１５または予め定められた情報端末機１６に送信するようにしている。本実施形態の通知手段１４は、対象電気機器（白熱灯３ｆからなるトイレ照明機器またはテレビジョン受像機３ａ）の電源がオフからオン或いはオンからオフとなった時点で、その動作情報を安否情報管理手段１５または予め定められた情報端末機１６に送信する。当該動作情報には、例えば、対象者（電力需要家２）を特定する対象者ＩＤと、対象電気機器を特定する電気機器ＩＤ（例えば本実施形態では、白熱灯３ｆとテレビジョン受像機３ａとのどちらの情報なのかを特定するＩＤ）と、電気機器３の動作状態を特定するコード（例えば本実施形態では、電源がオフからオンになったのか或いはオンからオフとなったのかを表すコード）が含まれる。
【００４５】
安否情報管理手段１５は、例えば通知手段１４から送信された対象電気機器の動作情報を受信する手段と、当該受信した対象電気機器の動作情報を記録し管理する手段と、当該記録し管理している対象電気機器の動作情報の一部又は全部をディスプレイ等の出力装置に出力する手段等を有するコンピュータである。安否情報管理手段１５は、対象者の安否確認を業として行う安否確認事業者によって運用されている。安否確認事業者は、安否情報管理手段１５が受信した対象電気機器の動作情報に基づいて、白熱灯３ｆからなるトイレ照明機器またはテレビジョン受像機３ａの動作頻度、動作時間、動作時間帯等を把握することができ、対象者が健常に生活しているか否かを判断することができる。その結果、何らかの異常が確認された場合（例えば白熱灯３ｆからなるトイレ照明機器またはテレビジョン受像機３ａの電源が一日以上オフの状態となっている等）には、安否確認事業者は、例えば対象者に電話連絡等をして安否確認を直接とる、または対象者の家族や担当医師等に電話連絡等をして対象者の安否確認を依頼する等の措置を施すことができる。尚、安否情報管理手段１５としてのコンピュータが有する演算機能により、対象電気機器の動作頻度、動作時間、動作時間帯が許容値の範囲内にあるか否かを判断し、許容値の範囲外にある場合に警告音や警告灯または警告メッセージ等を出力して、安否確認事業者または対象者の家族や担当医師等に注意を促すように構成しても良い。
【００４６】
情報端末機１６は、通知手段１４から送信された対象電気機器の動作情報を受信する手段と、当該受信した対象電気機器の動作情報をディスプレイやスピーカー等の出力装置に出力する手段等を有する装置であり、例えば対象者の家族や担当医師等が所有するパーソナルコンピュータ、電話機、携帯電話機等である。対象者に対応する情報端末機１６を予め設定する場合は、例えば通知手段１４が有する記憶装置に、対象電気機器の動作情報を送信すべき情報端末機１６の情報（例えば、電話番号、電子メールアドレス、ＩＰアドレス等）を予め記憶させておく。この場合、安否情報管理手段１５および安否確認事業者を介在させず、通知手段１４から直接的に対象者の家族や担当医師等に対象電気機器の動作情報を通知するシステムが構築できる。尚、対象電気機器の動作状態が変化する度に、通知手段１４と情報端末機１６との間で通信することが不都合な場合等には、一定時間毎に通知手段１４が当該一定時間内における対象電気機器の動作情報をまとめて情報端末機１６に送信するようにしても良い。更に、この場合、対象電気機器の動作情報を加工して（例えば対象電気機器の動作状態の経時変化をグラフで表して）、情報端末機１６に送信するようにしても良い。
【００４７】
尚、通知手段１４が直接的に情報端末機１６に対象電気機器の動作情報を送信するものに限らず、安否情報管理手段１５が対象電気機器の動作情報を予め定められた情報端末機１６に例えば電子メールや音声メッセージ等として送信するようにしても良い。また、安否情報管理手段１５をＷＷＷサーバとして構成し、対象者の家族や担当医師等が自身の所有する情報端末機１６のブラウザソフトウェアを用いて、安否情報管理手段１５にアクセスし、対象電気機器の動作情報を閲覧できるようにしても良い。
【００４８】
通知手段１４と安否情報管理手段１５または情報端末機１６との間の通信には、既知の有線又は無線の通信技術および通信回線（例えば、電話回線、インターネット専用回線、ＰＨＳ（Ｐｅｒｓｏｎａｌ　Ｈａｎｄｙ　ｐｈｏｎｅ　Ｓｙｓｔｅｍ）網、携帯電話網、ケーブルテレビ回線等）を適宜採用して良い。通知手段１４、安否情報管理手段１５、情報端末機１６は、採用された通信技術および通信回線による通信を可能にするハードウェアやソフトウェアを備えて構成される。
【００４９】
以上のように構成された電力需要家在室者の安否確認システムによると、以下のようにして対象者の安否を非侵入的に確認することが可能である。すなわち、引込線４の電力需要家２の引込口に測定センサーであるＰＴ１１１ａ，１１１ｂ及びＣＴ１１２ａ，１１２ｂを配置し、実際に、非侵入型モニタリングシステム１を動作させて電力需要家２の対象電気機器の動作状態を推定させる。尚、この電力需要家２の電気機器３の動作状態の組み合わせは、上述した教師データとは異なる電気機器３の動作状態の組み合せであっても良い。
【００５０】
この電力需要家２における電気機器３の測定データ、すなわち測定センサーであるＰＴ１１１ａ，１１１ｂ及びＣＴ１１２ａ，１１２ｂからの測定データ（電圧ＶＡ　，ＶＢ　、電流ＩＡ　，ＩＢ　）は、例えば教師データとして学習に使っていないデータである。このようなＰＴ１１１ａ，１１１ｂ及びＣＴ１１２ａ，１１２ｂからの測定データを、データ抽出手段１２に入力する。
【００５１】
このデータ抽出手段１２において、アナログ電圧データＶＡ　，ＶＢ　とアナログ電流データＩＡ　，ＩＢ　とは、Ａ／Ｄ変換器１２１によりデジタルデータに変換される。このＡ／Ｄ変換器１２１からのデジタルデータを用いて、高速フーリエ変換器１２２により、基本波並びに高調波の電流データＩＡ（１−１３）、ＩＢ（１−１３）及び位相差データφＡ（１−１３）　，φＢ（１−１３）　を得る。
【００５２】
これらの基本波並びに高調波の電流データＩＡ（１−１３）、ＩＢ（１−１３）及び位相差データφＡ（１−１３）　，φＢ（１−１３）　は、ニューラルネットワーク１３に供給される。ニューラルネットワーク１３では、推定手段１３１によって、現在入力されている測定データのパターンを参照し、学習によって得られた推定能力によってパターン認識し、そのパターン認識した結果をニューラルネットワーク１３の推定結果（図では「対象電気機器の動作状態」と表示する）として出力する。
【００５３】
通知手段１４は、既知の通信技術により非侵入型モニタリングシステム１の推定結果として対象電気機器の動作情報を安否情報管理手段１５または予め定められた情報端末機１６に送信する。安否確認事業者は、安否情報管理手段１５が受信した対象電気機器の動作情報に基づいて、白熱灯３ｆからなるトイレ照明機器またはテレビジョン受像機３ａの動作頻度、動作時間、動作時間帯等を把握して、対象者が健常に生活しているか否かを判断することができる。また、対象者の家族や担当医師等も、情報端末機１６が受信した対象電気機器の動作情報に基づいて、白熱灯３ｆからなるトイレ照明機器またはテレビジョン受像機３ａの動作頻度、動作時間、動作時間帯等を把握して、対象者が健常に生活しているか否かを、安否確認事業者を介さずに直接的に判断することができる。
【００５４】
本発明の電力需要家在室者の安否確認方法及びシステムによれば、給電線入口位置に非侵入型モニタリングシステム１を設置し、特定電気機器に高調波信号注入装置６を取り付けるだけで、特定電気機器にマイクロコンピュータ等の情報処理機能や無線通信装置等の通信機能を付加または内蔵することなく、簡易な構成で特定電気機器の動作状態を把握することができる。さらに、本発明は、電気機器自体が電力需要家外部の情報処理装置と通信を行うわけではなく、電力需要家２の家屋内に入らない非侵入的な方法で対象者の安否を確認することができるので、対象者に第三者から監視されている等の意識を極力もたれないように構成できる。
【００５５】
また、本実施形態で採用した非侵入型モニタリングシステム１によれば、インバータ機器を含む複数の電気機器３の動作状態を推定することができ、特定電気機器の動作情報のみならず、他の電気機器３の動作情報をも加えた総合的な対象者の安否判断が可能となる利点がある。更に、特定電気機器の消費電力が他の電気機器３と比較して相対的に小さくしかも高調波をあまり発生さないために非侵入型モニタリングシステム１のみでは動作状況の識別が比較的難しい場合でも、高調波信号注入装置６を接続して特定電気機器がオン動作するときに特徴的な高調波を屋内配線回路１７に流すことで、非侵入型モニタリングシステム１が特定電気機器の動作状態を確実に識別することができる。
【００５６】
なお、上述の実施形態は本発明の好適な実施の一例ではあるがこれに限定されるものではなく、本発明の要旨を逸脱しない範囲において種々変形実施可能である。例えば、本発明の適用は、戸建て住宅のみばかりが対象ではなく、アパート等の集合住宅、高齢者施設、病院等にも適用可能である。この場合、例えば、各戸（部屋）内の特定電気機器に高調波信号注入装置６を取り付け、各戸（部屋）の分電盤に非侵入型モニタリングシステム１を取り付ければ良い。さらに、各戸（部屋）毎に非侵入型モニタリングシステム１を取り付けず、例えば、各戸（部屋）の高調波信号注入装置６がそれぞれユニークな高調波電流を発生させるようにして、複数戸（部屋）一括の非侵入型モニタリングシステム１を給電線の上流に設置するようにしても良い。
【００５７】
また、上述の実施形態では、特定電気機器は電力需要家２内に一つであったが、二つ以上であっても良い。この場合、例えば、注入信号（交流電流）の周波数、振幅、基本波電圧に対する位相差を適宜調整できるように高調波信号注入装置６を構成して、複数の特定電気機器のそれぞれに取り付ける高調波信号注入装置６がそれぞれユニークな高調波電流を発生させるようにすれば良い。これにより、非侵入型モニタリングシステム１では、複数の特定電気機器が単独あるいは同時に動作したときの状態を特定電気機器個別に一意に確定的に識別できる。
【００５８】
また、上述の実施形態では、非侵入型モニタリングシステム１として、電力需要家２内の複数の電気機器３の個別の動作状態を推定することができるものを採用したが、必ずしも複数の電気機器３の個別の動作状態を推定する必要はなく、特定電気機器のみの動作状態を推定するものであっても良い。この場合、例えばニューラルネットワーク１３の学習を次のようにして行うようにする。即ち、図３に示す複数の電気機器３個々につけられたスイッチ１８〜２３を入り切りして、更にはインバータ機器の電流を任意に設定して、複数の電気機器３が種々の動作状態となる状況を作る。当該状況のそれぞれについて、即ち複数の電気機器３の種々の動作状態の各組み合わせについて、測定センサーであるＰＴ１１１ａ，１１１ｂ及びＣＴ１１２ａ，１１２ｂとデータ抽出手段１２とを用いて、高調波電流と高調波電流の基本波電圧に対する位相に関するデータを測定する。当該測定したデータと、当該測定したデータに対応する状況における特定電気機器の動作状態（即ち、特定電気機器の電源がオンの状態であったかオフの状態であったか）とを、教師データとしてニューラルネットワークに与えて学習を行う。これにより、非侵入型モニタリングシステム１では、特定電気機器の動作の有無（即ち、高調波信号注入装置６の動作の有無）に起因する高調波電流のパターンの差異を認識し、当該差異から特定電気機器の動作状態を、一意に確定的に識別することができる。
【００５９】
また、上述の実施形態では、パターン認識手段としてニューラルネットワークを用いた例について主に説明したがこれに特に限定されるものではなく、例えば最も近くの範例を探す最近傍法や、ラージ・マージン・クラスファイア、その他既知又は新規の推定アルゴリズムを採用しても良い。
【００６０】
さらに、本発明は、特定電気機器の動作状態の推定方法及びシステムとして構成することもできる。即ち、特定電気機器の動作状態の推定方法では、電力需要家内の特定の電気機器の動作に伴って、電力需要家内の電気機器が発生する高調波電流にはない特徴を有する高調波電流が電力需要家内の屋内配線回路に流れるようにし、電力需要家の給電線引込口付近で総負荷電流及び電圧を測定し、当該測定した総負荷電流及び電圧から当該総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差を求め、当該求めた総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差に基づいて特定電気機器の動作状態を推定するようにする。また、上記方法を装置化した特定電気機器の動作状態の推定システムは、電力需要家２内の電気機器３のうち特定の電気機器に取り付けられて、特定電気機器の動作に伴い電力需要家２内の電気機器３が発生する高調波電流にはない特徴を有する高調波電流を電力需要家２内の屋内配線回路１７に流す高調波信号注入装置６と、電力需要家２の給電線引込口付近で測定した総負荷電流及び電圧から当該総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差を求め、当該求めた総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差に基づいて特定電気機器の動作状態を推定する非侵入型モニタリングシステム１とを有するようにする。
【００６１】
この場合、特定電気機器の動作状態の推定結果は、需要家在室者の安否確認に用いられるものには限らない。例えば、電気事業者や電気機器の製造業者や販売業者等にとって電力需要家２の側の重要な情報の一つに電力需要家２が保有する電気機器の構成や使用実態に関する情報がある。これらの情報は、ＤＳＭ（Ｄｅｍａｎｄ　Ｓｉｄｅ　Ｍａｎａｇｅｍｅｎｔ）の効果評価、潜在需要の予測、負荷率低下の要因分析、きわめて細かな季時別料金システムの構築、需要家への各種サービスの提供等を行う上で必要不可欠である。従って、特定電気機器の動作状態の推定結果を、電力需要家２が保有する電気機器の構成や使用実態に関する有用な情報の１つとして活用することができる。尚、この場合の特定電気機器は、需要家在室者が健常に生活しているか否かを推測できるものである必要はない。
【００６２】
また、上述の実施形態では、高調波信号注入装置６を電気機器とは別体として構成したが、高調波信号注入装置６を電気機器に内蔵させても良い。従来は低減させることが常識であった高調波を、電気機器の動作に影響を及ぼさない範囲であえて発生させる電気機器は、従来ない新規なものである。そして、高調波信号注入装置６を備えた電気機器によれば、上述したように当該電気機器の動作状態を非侵入的に且つ高い信頼性で推定することが可能になる。更に当該推定結果は、需要家在室者の安否確認や、電力需要家２が保有する電気機器の構成や使用実態に関する有益情報等として活用できる。
【００６３】
【発明の効果】
以上の説明から明らかなように、請求項１記載の特定電気機器の動作状態推定方法および請求項２記載の特定電気機器の動作状態推定システムによれば、同一あるいは類似の高調波電流を発生する複数の電気機器が電力需要家内に接続されている場合であっても、特定の電気機器の動作状態を非侵入的に推定することができる。
【００６４】
また、請求項３記載の電力需要家在室者の安否確認方法および請求項４記載の電力需要家在室者の安否確認システムによれば、特定電気機器にマイクロコンピュータ等の情報処理機能や無線通信装置等の通信機能を付加または内蔵することなく、簡易な構成で特定電気機器の動作状態を把握することができる。さらに、電力需要家の家屋内に入らない非侵入的な方法で当該電力需要家の在室者の安否を確認することができ、電気機器自体が電力需要家外部の情報処理装置と通信を行うわけではないので、電力需要家在室者に第三者から監視されている等の意識を極力もたれないように構成できる。
【００６５】
さらに、請求項５記載の電力需要家在室者の安否確認システムによれば、一般の電気機器が発生する高調波電流にはない特徴的な高調波電流を確実に発生させることができる。
【００６６】
さらに、請求項６記載の電力需要家在室者の安否確認システムによれば、高調波信号注入装置を特定電気機器や屋内配線回路に組み込む必要はなく、既存の特定電気機器と既存の屋内配線回路との間に高調波信号注入装置を簡単に取り付けることができる。
【００６７】
さらに、請求項７記載の高調波信号注入装置を備えた電気機器によれば、特徴的な高調波の有無に基づいて当該電気機器の動作状態を推定することができ、更に当該推定結果に基づいて電力需要家在室者が健常に生活しているか否かを判断することができる。
【図面の簡単な説明】
【図１】本発明の実施の形態に係る電力需要家在室者の安否確認方法及びシステムが適用された電力需要家の電気系を示す図である。
【図２】非侵入型モニタリングシステムの構成の一例を示す概略構成図である。
【図３】図１における電気回路だけを取り出した概略ブロック図である。
【図４】非侵入型モニタリングシステムの教師データとして使用する入力データ例を示し、特定電気機器が動作してない状態を示す図である。
【図５】非侵入型モニタリングシステムの教師データとして使用する入力データ例を示し、特定電気機器が動作している状態を示す図である。
【図６】特定電気機器と並列となるように高調波信号注入装置を屋内配線回路に取り付けた場合を示す概略ブロック図である。
【図７】特定電気機器と直列となるように高調波信号注入装置を屋内配線回路に取り付けた場合を示す概略ブロック図である。
【符号の説明】
１　非侵入型モニタリングシステム
２　電気需要家
３　電気機器
４　引込線
４ａ　Ａ相
４ｂ　Ｂ相
４ｎ　中性線
１２　データ抽出手段
１３　パターン認識手段としてのニューラルネットワーク
１４　通知手段
１５　安否情報管理手段
１６　情報端末機
１１１ａ、１１１ｂ　ＰＴ（計器用変成器）
１１２ａ、１１２ｂ　ＣＴ（計器用変流器）
１２１　Ａ／Ｄ変換器
１２２　高速フーリエ変換器
１３１　推定手段[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and a system for estimating an operation state of a specific electric device, a method and a system for confirming the safety of an occupant of a power consumer, and an electric device including a harmonic signal injection device. More specifically, the present invention provides a method and system for estimating the operation state of a specific electrical device in a non-invasive manner that does not enter the house of a power consumer, and the method and system for applying the estimation method and system. The present invention relates to a method and a system for confirming the safety of a occupant of an electric power consumer, and an electric device including a harmonic signal injection device used in the method and the system.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a monitoring system for non-invasively estimating an operation state of an electric device has been proposed (see Japanese Patent Application Laid-Open No. 2000-292465). This monitoring system focuses on the pattern of the harmonic current generated by the electric equipment installed in the electric power consumer, and calculates the fundamental wave of the total load current and the total load current from the total load current and voltage measured near the feed line entrance. The phase difference between the current and the voltage of the harmonic is obtained, and the operating state of each of the electric equipment used indoors and the electric equipment is estimated from the pattern.
[0003]
On the other hand, there has been proposed a technology related to a life monitor system capable of monitoring the safety of an elderly person or a physically handicapped person living alone over a long distance (see JP-A-2002-78034). This life monitoring system detects an operation or an operation of an electric appliance (for example, an electric pot) and stores a monitoring unit that stores information such as a transmission destination, and transmits the information detected by the monitoring unit to outside the home via a communication network. Transmitting means for transmitting, information storing means for receiving the information of the electric appliance from the transmitting means and centrally managing information of a large number of persons to be monitored, and processing means for processing the stored information of the information storing means so as to be displayed And display means for displaying the data processed by the processing means so that the data can be viewed from the outside.
[0004]
[Problems to be solved by the invention]
However, in the monitoring system disclosed in Japanese Patent Application Laid-Open No. 2000-292465, when a plurality of electrical devices that generate the same or similar harmonic current are connected, the operating state of a specific electrical device is uniquely determined. It is difficult to discriminate deterministically.
[0005]
Further, in the life monitoring system disclosed in JP-A-2002-78034, it is necessary to add or incorporate an information processing function such as a microcomputer and a communication function such as a wireless communication device to an electric product to be monitored. For this reason, it is necessary to make the electrical products themselves intelligent, which increases the cost. Also, the fact that an electric appliance connected to the interior of a power consumer communicates with an information processing device outside the power consumer seems to be constantly monitored by a third party to the power consumer occupants. Not comfortable.
[0006]
Therefore, the present invention provides a method capable of non-invasively estimating the operation state of a specific electric device even when a plurality of electric devices generating the same or similar harmonic currents are connected in the power consumer. The purpose is to provide a system. It is another object of the present invention to provide a method and a system for confirming the safety of the occupants of a power consumer by applying the estimation method and the system. It is another object of the present invention to provide an electric device including a harmonic signal injection device used in these methods and systems.
[0007]
[Means for Solving the Problems]
In order to achieve such an object, a method for estimating an operation state of a specific electric device according to claim 1 includes a method for calculating a harmonic current generated by an electric device in the electric power consumer with the operation of the specific electric device in the electric power consumer. To measure the total load current and voltage in the vicinity of the power line entrance of the power customer, and measure the total load current and voltage from the measured total load current and voltage. The phase difference of the harmonic current with respect to the harmonic current and the voltage of the total load current is obtained, and the operation of the specific electric device is determined based on the phase difference of the harmonic current and the harmonic current with respect to the obtained total load current. The state is estimated.
[0008]
In addition, the system for estimating the operating state of a specific electric device according to claim 2 is attached to a specific electric device in a power consumer, and a harmonic current generated by the electric device in the power consumer with the operation of the specific electric device. And a harmonic signal injection device for flowing a harmonic current having a characteristic not present in an indoor wiring circuit in a power consumer, and a harmonic of the total load current based on a total load current and a voltage measured in the vicinity of a power supply line entrance of the power consumer. The phase difference of the harmonic current with respect to the wave current and the voltage is obtained, and the operation state of the specific electric device is estimated based on the obtained phase difference of the harmonic current with respect to the harmonic current and the voltage of the total load current. It has an invasive monitoring system.
[0009]
Therefore, a characteristic harmonic flows in the indoor wiring circuit with the operation of the specific electric device. The characteristic harmonic has a characteristic influence on the harmonic component of the total load current and the phase difference of the harmonic current with respect to the voltage. For this reason, if the phase difference of the harmonic current and the harmonic current with respect to the voltage of the total load current is calculated from the total load current and the voltage measured near the power supply line entrance of the power consumer, the characteristic harmonic The operation state of the specific electric device can be estimated based on the presence or absence of the specific electric device.
[0010]
Further, the invention according to claim 3 is a method for confirming the safety of the occupants of the target power consumer, and the operation of the specific electrical equipment within the power consumer causes the electrical equipment within the power consumer to operate. A harmonic current having characteristics not present in the generated harmonic current is caused to flow in the indoor wiring circuit in the power customer, and the total load current and voltage are measured near the power supply line entrance of the power customer, and the measured total From the load current and the voltage, the phase difference of the harmonic current with respect to the harmonic current and the voltage of the total load current is obtained, and based on the obtained phase difference of the harmonic current with respect to the harmonic current and the voltage of the total load current. Thus, the operation state of the specific electric device is estimated, and the estimated result is notified to means for managing the safety information of the occupants or a predetermined information terminal corresponding to the occupants.
[0011]
Further, the invention according to claim 4 is a system for confirming the safety of the occupants of the target power consumer, which is attached to a specific electrical appliance in the power consumer, and is provided with the operation of the specific electrical appliance. A harmonic signal injection device that flows a harmonic current, which has characteristics that are not found in the harmonic current generated by the electric equipment in the customer, into the indoor wiring circuit in the power consumer, and a total measured near the power supply inlet of the power consumer. From the load current and the voltage, the phase difference of the harmonic current with respect to the harmonic current and the voltage of the total load current is obtained, and based on the obtained phase difference of the harmonic current with respect to the harmonic current and the voltage of the total load current. A non-invasive monitoring system for estimating the operating state of a specific electrical device, and safety information management means for managing estimation result information of the non-invasive monitoring system or a predetermined corresponding to the occupant. The distribution terminal, and to have a notification unit that notifies the estimation result of the non-intrusive monitoring system.
[0012]
Therefore, a characteristic harmonic flows in the indoor wiring circuit with the operation of the specific electric device, and the operation state of the specific electric device can be estimated based on the presence or absence of the characteristic harmonic. This estimation result is notified to the safety information management means or a predetermined information terminal. The safety confirmation business or the family members of the occupants, the doctor in charge, etc. who perform the occupancy confirmation of the occupants as a business, use the safety information management means or the information terminal, the operation frequency, operation time, operation time of the specific electrical equipment It is possible to determine whether or not the occupants are living healthy from the obi and the like.
[0013]
According to a fifth aspect of the present invention, in the safety confirmation system for an occupant of a power consumer in the fourth aspect, the harmonic signal injection device generates harmonic currents of any order singly or in combination. Like that.
[0014]
Therefore, it is possible to generate a characteristic harmonic current that is not included in the harmonic current generated by a general electric device. For example, in the harmonic currents generated by general electric equipment, odd-ordered harmonic currents predominate, even-ordered harmonic currents are small, and the third-, fifth-, and seventh-order harmonic currents are dominant. The proportions of higher harmonic currents such as ninth, eleventh, and thirteenth are very small in the total load current. Therefore, the harmonic current generated by the harmonic signal injection device matches one of the frequencies of the even-order or the ninth or higher odd-order, or one of the frequencies of the even-order and the ninth or higher odd-order. Those composed of parts or all combinations are preferred.
[0015]
According to a sixth aspect of the present invention, in the safety confirmation system for an occupant of a power consumer according to the fourth or fifth aspect, the harmonic signal injection device is electrically connected to a current intake unit of the specific electric device. An interface and an interface electrically connected to the current supply unit of the indoor wiring circuit are provided. In this case, the harmonic signal injection device can be attached between the existing specific electric device and the existing indoor wiring circuit.
[0016]
Further, according to the invention of claim 7, in the electric equipment connected to the indoor wiring circuit in the electric power consumer and used, there is no harmonic current generated by the electric equipment in the electric power consumer when the electric equipment operates. There is provided a harmonic signal injection device for flowing a characteristic harmonic current to an indoor wiring circuit in a power consumer. Therefore, a characteristic harmonic flows into the indoor wiring circuit with the operation of the electric device. The operation state of the electric device can be estimated based on the presence or absence of this characteristic harmonic, and it is further determined whether or not the occupant of the power consumer is living a healthy life based on the estimation result. Can be.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the configuration of the present invention will be described in detail based on an embodiment shown in the drawings.
[0018]
FIG. 1 to FIG. 7 show an embodiment of a method and system for confirming the safety of the occupants of a power consumer according to the present invention. The method for confirming the safety of the occupants of the target power consumer according to the present invention has a feature that is not included in the harmonic current generated by the electrical equipment in the power consumer with the operation of the specific electrical equipment in the power consumer. Make the harmonic current having flow in the indoor wiring circuit in the power customer, measure the total load current and voltage near the power line entrance of the power customer, and from the measured total load current and voltage, Obtain the phase difference of the harmonic current with respect to the harmonic current and the voltage, and estimate the operating state of the specific electric device based on the phase difference of the harmonic current with respect to the harmonic current and the voltage of the obtained total load current. The result of the estimation is notified to a means for managing the safety information of the occupants or a predetermined information terminal corresponding to the occupants.
[0019]
This method of confirming the safety of the occupant of the power customer is implemented as a system for confirming the safety of the occupant of the power customer. This safety confirmation system for the occupants of the electric power consumer is attached to a specific electric equipment 3f among the electric equipments 3 in the electric power consumer 2, and the electric equipment 3 in the electric power consumer 2 in accordance with the operation of the specific electric equipment. The harmonic signal injection device 6 that supplies a harmonic current having a characteristic not present in the harmonic current generated by the indoor wiring circuit 17 in the power consumer 2 and the total measured in the vicinity of the feed line inlet of the power consumer 2 From the load current and the voltage, the phase difference of the harmonic current with respect to the harmonic current and the voltage of the total load current is obtained, and based on the obtained phase difference of the harmonic current with respect to the harmonic current and the voltage of the total load current. A non-invasive monitoring system 1 for estimating the operating state of a specific electrical device by using the safety information management means 15 for managing estimation result information of the non-invasive monitoring system 1 or predetermined information corresponding to the occupants. To the terminal 16, and a notification unit 14 for notifying the estimated results of the non-intrusive monitoring system 1.
[0020]
In the present embodiment, the occupants of the power consumer 2 who are targets of the safety confirmation system are simply referred to as the target persons. The subject is, for example, an elderly person living alone (elderly person living alone), a disabled person, or the like. With the safety confirmation system of the present invention, the subject's family or a doctor in charge can remotely determine whether or not the subject is living properly. Can be confirmed from.
[0021]
The specific electric device is the electric device 3 to which the harmonic signal injection device 6 is attached. The specific electric device is, for example, the electric device 3 used in close connection with the living behavior of the subject, and based on the operation frequency, operation time, operation time zone, and the like of the electric device 3, the target person can live a healthy life. It is preferable to be able to infer whether or not it is performing. For example, in the present embodiment, in order to simplify the explanation, the television receiver 3a, the refrigerator 3b, the inverter air, and the like are provided in the indoor wiring circuit 17 (downstream of the power supply line) in the power consumer 2 of the subject as the electric equipment 3. It is assumed that only the living room lighting device including the conditioner 3c, the fluorescent lamp 3d, and the incandescent lamp 3e and the toilet lighting device including the incandescent lamp 3f are connected, and the toilet lighting device including the incandescent lamp 3f is a specific electric device. The indoor wiring circuit 17 is connected to a power system of an electric utility or the like via a power supply line (that is, an electric wire installed on the service line 4 and the electric pole 5). It is needless to say that the electric device 3 connected to the indoor wiring circuit 17 in the power consumer 2 of the subject is not limited to the electric device 3 illustrated in the present embodiment. Further, in the present embodiment, an example will be described in which the specific electric device is only the toilet lighting device including the incandescent lamp 3f, but the specific electric device is not necessarily limited to a single device and may be a plurality.
[0022]
The harmonic signal injection device 6 of the present embodiment is a device that causes a characteristic harmonic current to flow through the indoor wiring circuit 17 when the specific electric device is in a power-on state. In the present embodiment, the non-intrusive monitoring system 1 can estimate whether or not the specific electrical device is in a power-on state from the presence or absence of the characteristic harmonic current.
[0023]
The harmonic current (that is, the harmonic component of the AC current) generated by the harmonic signal injection device 6 is transmitted to the electric equipment 3 (for example, the television receiver 3a, the refrigerator 3b, the inverter air in the present embodiment) in the power consumer 2. It is assumed that the harmonic currents generated by the conditioner 3c, the fluorescent lamp 3d, the living room lighting device including the incandescent lamp 3e, and the toilet lighting device including the incandescent lamp 3f) have characteristics that are not included in the harmonic current generated. The characteristics are expressed as, for example, the order of the harmonic current, the intensity of the harmonic current, the phase difference of the harmonic current with respect to the fundamental voltage, or a combination thereof. As for the harmonic currents generated by the general electric equipment 3, odd-numbered ones predominantly appear, even-numbered ones are small, and the third-, fifth-, and seventh-ordered ones are dominant. Higher harmonic currents such as the ninth, eleventh, and thirteenth orders have a very small proportion included in the total load current. Therefore, the harmonic current generated by the harmonic signal injection device 6 is equal to any one of the even-order or the ninth or higher odd-numbered frequencies, or the harmonic current of the even-order and ninth or higher odd-numbered frequencies. Those composed of a part or all of the combinations are preferable. For example, in the harmonic signal injection device 6 of the present embodiment, when the specific electric device is in a power-on state, the 13th harmonic current is 0.5 A and the phase difference is 0 ° with respect to the fundamental voltage, It flows to the indoor wiring circuit 17. However, the characteristic harmonic current generated by the harmonic signal injection device 6 is not limited to the example of the present embodiment. For example, the phase difference of the harmonic current generated by the harmonic signal injection device 6 with respect to the fundamental voltage may have a feature that is not present in all the electric devices 3 in the power consumer 2. Further, within a range that does not affect the operation of the electric equipment 3 in the power consumer 2, the harmonic current generated by the harmonic signal injection device 6 is set to be higher than that of the thirteenth order, and the power consumer 2 A feature that does not exist in all the electric devices 3 may be displayed.
[0024]
The harmonic signal injection device 6 may be attached to the indoor wiring circuit 17 so as to be in parallel with the specific electric device (the incandescent lamp 3f in this embodiment) or the indoor wiring circuit 17 so as to be in series with the specific electric device. 17 may be attached.
[0025]
As shown in FIG. 6, for example, the parallel-type harmonic signal injection device 6 generates a single or combined electric signal of harmonics of an arbitrary order, and a signal generator 25 that is output from the signal generator 25. A voltage amplifying unit 26 and a power amplifying unit 27 for amplifying an electric signal, a voltage detecting unit 29 for detecting that the switch 18 is turned on, and a signal generating unit based on an output signal from the voltage detecting unit 29. 25, a control unit 28 that controls the operations of the voltage amplification unit 26 and the power amplification unit 27, and an impedance matching unit 30. The impedance matching unit 30 is a circuit for equalizing the output impedance of the power amplification unit 27 and the impedance of the indoor wiring circuit 17 in order to efficiently send the signal power amplified by the power amplification unit 27 to the indoor wiring circuit 17. .
[0026]
In addition, as shown in FIG. 7, for example, the series-type harmonic signal injection device 6 includes a signal generator 25 that generates single or combined electric signals of harmonics of an arbitrary order, and a signal generator 25. A voltage amplifying unit 26 and a power amplifying unit 27 for amplifying an output electric signal; a current detecting unit 31 for detecting that the switch 18 is turned on; and a signal based on an output signal from the current detecting unit 31. A control unit 28 that controls the operation of the generation unit 25, the voltage amplification unit 26, and the power amplification unit 27, and a signal mixing unit 32 that superimposes the generated harmonic current on the load current flowing through the specific electric device Is done.
[0027]
However, the configuration of the harmonic signal injection device 6 is not limited to those illustrated in FIG. 6 and FIG. For example, the parallel harmonic signal injection device 6 may be constituted by a circuit for generating an AC current of a specific frequency or a circuit for generating a combination of AC currents of a specific frequency, and a current amplifier. Further, for example, a series-type harmonic signal injection device 6 is configured to use a nonlinear element having a low impedance with respect to a fundamental frequency and a low-order harmonic frequency, and to use a high-order load current flowing through a specific electric device. The distortion may be applied to the harmonic frequency region to generate a characteristic harmonic pattern. Both the parallel-type and series-type harmonic signal injection devices 6 are configured to operate when a current flows through a specific electric device (the incandescent lamp 3 f in the present embodiment) by operating the switch 18, and started operation. The harmonic signal injection device 6 supplies the above-described characteristic harmonic current to the indoor wiring circuit 17. This characteristic harmonic current is superimposed on the load current flowing through the specific electric device.
[0028]
For example, in the present embodiment, a parallel type harmonic signal injection device 6 is employed. In addition, the parallel harmonic signal injection device 6 according to the present embodiment includes an interface that is electrically connected to a current intake unit (for example, a power plug or a portion corresponding to a power plug) of a specific electric device, and an indoor wiring circuit 17. And an interface electrically connected to a current supply unit (for example, an outlet or a portion corresponding to an outlet). In this case, there is no need to incorporate the harmonic signal injection device 6 into the specific electric device or the indoor wiring circuit 17, and the harmonic signal injection device 6 can be easily mounted between the existing specific electric device and the existing indoor wiring circuit 17. be able to.
[0029]
As the non-intrusive monitoring system 1, for example, in the present embodiment, an electric device monitoring system disclosed in Japanese Patent Application Laid-Open No. 2000-292465 is employed. According to the non-intrusive monitoring system 1, attention is paid to the fundamental and harmonic currents generated by the electric equipment 3 installed in the power consumer 2 and the phase patterns with respect to those voltages, and the pattern of the neural network or the like is used. By applying the recognition method, it is possible to estimate the individual operating states of the plurality of electric devices 3 including the inverter device from the measurement results of the total load current and the voltage near the power supply line entrance.
[0030]
Here, the toilet lighting device including the incandescent lamp 3f is suitable as a specific electrical device that can estimate whether or not the subject is living a healthy life based on the operation frequency, operation time, operation time zone, and the like. Since the power consumption is smaller than that of the electric device 3 and less harmonics are generated, it is difficult to accurately identify the operation state of the toilet lighting device including the incandescent lamp 3f using only the non-intrusive monitoring system 1. It is. In addition, although there are two incandescent lamps 3e and 3f in the electric power consumer 2 of the present embodiment, it is difficult to identify only the operating state of a specific incandescent lamp 3f only by the non-intrusive monitoring system 1. . Therefore, in the present invention, by using the harmonic signal injection device 6, the operation state of the toilet lighting device including the incandescent lamp 3f can be reliably identified.
[0031]
In addition, according to the non-intrusive monitoring system 1 of the present embodiment, not only the operation state of the specific electric device but also the individual operation state of the electric device 3 other than the specific electric device in the power consumer 2 is estimated. can do. For example, the television receiver 3a can also estimate whether or not the subject is living a healthy life from the operation frequency, operation time, operation time zone, and the like. For example, in the present embodiment, in addition to the operation information of the toilet lighting device including the incandescent lamp 3f, the operation information of the television receiver 3a is also obtained. Hereinafter, in the present embodiment, the electric device 3 including the specific electric device to be determined for the safety confirmation of the target person is referred to as a target electric device.
[0032]
This non-intrusive monitoring system 1 basically includes a measurement sensor, data extraction means 12 for extracting data on the fundamental wave and harmonic currents and their phases with respect to their voltages from the measurement data detected by the measurement sensor, It comprises pattern recognition means for estimating the operation state of the electric equipment 3 used by the power consumer 2 based on the above-mentioned data from the extraction means 12, for example, a neural network 13.
[0033]
Here, the above-described measurement sensor is installed at one location near the entrance of the service line 4 of the power consumer 2. By adopting a configuration in which the measurement sensor is installed at one location near the entrance, a non-invasive system can be provided. Specifically, the measuring sensor includes, for example, an instrument transformer (PT) electrically connected in parallel to the service line 4 near the service entrance, and an instrument current transformer connected in series to the service service line 4 near the service port. (CT). More specifically, the primary side of the PT is connected in parallel to the service line 4 so that the voltage waveform of the service line 4 can be measured. Similarly, the primary side of the CT is connected in series with the service line 4 so that the current waveform of the service line 4 can be measured. Each secondary side of these PT and CT is connected to the input terminal of the data extracting means 12.
[0034]
The above-mentioned data extracting means 12 extracts data relating to the fundamental wave and harmonic current and data relating to the phase of the fundamental wave and the harmonic current with respect to the voltage from the measurement data detected by the PT and CT which are the measurement sensors. Can be. The data relating to the fundamental wave and the harmonic current from the data extracting means 12 and the data relating to the phase of the fundamental current (also referred to as the fundamental current) and the phase of the harmonic current (also referred to as the harmonic current) with respect to the voltage are: It is provided to a neural network 13 as one of the above-mentioned pattern recognition means.
[0035]
The neural network 13 described above is an information processing system that imitates the nerve cells of the human brain, and processes information while exchanging information by connecting several nerve cells (neurons) via a medium called a synapse. Is a parallel distributed processing system that performs The neural network 13 includes estimating means 131 for estimating the operation state of the electric device 3 including the inverter device used by the power consumer 2.
[0036]
First, teacher data is given to the estimating means 131. The teacher data includes, for various combinations of a plurality of electric devices 3 and various combinations of operating states of the electric devices 3, currents of some fundamental waves and harmonics measured in advance and phases with respect to those voltages. And data on the operating state of the electric device 3 which is the answer at that time. The estimating unit 131 inputs data on the harmonic components and the phase of the total load current measured by the measurement sensor of the electric power consumer 2, and performs individual patterning of the plurality of electric devices 3 including the inverter device by pattern recognition. The operation state can be estimated.
[0037]
FIG. 2 shows a specific configuration example of the non-intrusive monitoring system 1. In this figure, when the service line 4 drawn into the electric power consumer 2 is a single-phase three-wire system, in Japan, the service line 4 has an alternating current of 100 [V] between the A-phase 4a and the neutral line 4n. , 100 V between the B phase 4b and the neutral wire 4n, and 200 V between the A phase 4a and the B phase 4b. Between the A-phase 4a and the neutral wire 4n, the current I A1 , I A2 , ..., I A6 And the phase difference of voltage and current φ A1 , Φ A2 ,…, Φ A6 Is connected. Similarly, the current I is applied between the phase B 4b and the neutral wire 4n. B1 , I B2 , ..., I B6 And the phase difference of voltage and current φ B1 , Φ B2 ,…, Φ B6 Is connected. And the primary side of PT111a is connected between A phase 4a and neutral wire 4n. The secondary side of the PT 111a has a voltage V similar to the voltage of the A-phase 4a. A Is output. The primary side of the PT 111b is connected between the B phase 4b and the neutral wire 4n. A voltage V similar to the voltage of the B phase 4b is provided on the secondary side of the PT 111b. B Is output. If it is assumed that a penetration type is used for the CTs 112a and 112b, the CT 112a measures the current flowing through the A-phase 4a and outputs a current I similar to the A-phase current from the secondary side. A The CT 112b measures the current flowing in the B-phase 4b and outputs a current I similar to the B-phase current from the secondary side. B Is output. Here, the voltage V A And I A Is in principle equal to the phase relationship between the A-phase voltage and the A-phase current. B And I B Is maintained in principle equal to the phase relationship between the B-phase voltage and the B-phase current. These voltages V A , V B And the current I A , I B Is input to the data extracting means 12.
[0038]
The data extraction means 12 includes an analog / digital (A / D) converter 121 and a fast Fourier converter 122. The A / D converter 121 outputs the voltage V A , V B And current I A , I B Can be converted into digital data. The output of the A / D converter 121 is provided to the fast Fourier converter 122. The fast Fourier converter 122 converts the digital data from the A / D converter 121 into current data I A (1-13) , I B (1-13) , Phase difference data φ A (1-13) , Φ B (1-13) Can be obtained. Here, the current data I A1 , I B1 , Phase difference data φ A1 , Φ B1 Indicates the current and phase difference of the fundamental wave, respectively, and the current data I A (2-13) , I B (2-13) , Phase difference data φ A (2-13) , Φ B (2-13) The subscripts (2 to 13) indicate the harmonic current and the phase difference representing the second to thirteenth order of the harmonic, respectively, and multiply the fundamental frequency of the AC power supplied to the feed line by the numerical value of the order. Represents the frequency of the harmonic. For example, when the fundamental frequency is 50 Hz, the third harmonic current refers to a current component having only a frequency component of 150 Hz. Also, in general, odd-order harmonics appear predominantly, and even-order harmonics are small, so here, odd-order data of the second to thirteenth orders is given as input to the neural network 13 as harmonic data. I have.
[0039]
These fundamental and harmonic current data I A (1-13) , I B (1-13) , Phase difference data φ A (1-13) , Φ B (1-13) Are given to the neural network 13. The neural network 13 has already completed learning with the teacher data. The learning is performed as follows, for example. That is, the switches 18 to 23 provided to each of the plurality of electric devices 3 in the electric power consumer 2 shown in FIG. 3 are turned on and off, and further, the current of the inverter device is arbitrarily set (for example, if the inverter air conditioner 3c is used). The current can be changed by changing the indoor set temperature or the set wind speed.), And a situation is created in which the plurality of electric devices 3 are in various operating states. For each of the situations, that is, for each combination of various operating states of the plurality of electric devices 3, the fundamental current and the harmonic current are measured using the PT 111 a and 111 b and the CT 112 a and 112 b as the measurement sensors and the data extracting unit 12. And the data on the phases of the fundamental current and the harmonic current with respect to the fundamental voltage are measured. The measured data and the operating state of the electric device 3 in a state corresponding to the measured data (that is, whether the power of each electric device 3 was on or off, or if the power was on) Learning (how much power is consumed) is given to the neural network 13 as teacher data.
[0040]
For example, a fundamental wave when an electric device 3 (a living room lighting device including a television receiver 3a, a refrigerator 3b, an inverter air conditioner 3c, a fluorescent lamp 3d, and an incandescent lamp 3e) other than the toilet lighting device including the incandescent lamp 3f is operated. In addition, the current patterns of the harmonics and their phase difference patterns with respect to the fundamental wave voltage are obtained, for example, as shown in FIG. Further, for example, the basics when the electric equipment 3 other than the living room lighting equipment including the incandescent lamp 3e (the toilet lighting equipment including the television receiver 3a, the refrigerator 3b, the inverter air conditioner 3c, the fluorescent light 3d, and the incandescent light 3f) operate. The wave and harmonic current patterns and their phase difference patterns with respect to the fundamental voltage are obtained, for example, as shown in FIG. 4 and 5, the horizontal axis indicates the order of the current, and the vertical axis indicates the current value [A] and the phase difference. The current value is represented by an effective value of each order, and the phase difference is represented by a sine function value. The current values of the fundamental wave and the harmonics are indicated by thick lines in a bar shape, and the phase differences are indicated by thin lines. Here, it is preferable to normalize each current value and phase difference to a range from 0 to 1 or a range from -1 to 1 in order to equalize the weight of the information.
[0041]
The difference between the magnitude of the current and the phase difference appearing in the 13th harmonic current in FIGS. 4 and 5 is due to the presence or absence of operation of the harmonic signal injection device 6. The non-intrusive monitoring system 1 recognizes such a difference in the pattern, and can uniquely and definitely identify the operation state of the electric device 3 including the specific electric device from the difference.
[0042]
As described above, the data obtained when the plurality of electric devices 3 as shown in FIGS. 4 and 5 are operated in various combinations of the operation states and the operation state of the electric device 3 as the answer at that time are the teacher data. Is given to the neural network 13 so that the neural network 13 is learned. It is needless to say that the teacher data is not limited to the data shown in this example, and some data for a suitable combination of the electric devices 3 and a proper combination of operating states may be prepared.
[0043]
After learning the neural network 13 with the teacher data in this way, the operation state of the specific electric device of the power consumer 2 is actually measured non-invasively as shown in FIG. In the non-intrusive monitoring system 1, learning for improving the estimation accuracy by the neural network 13 can be performed from outside the power consumer 2 using a telephone line, an optical fiber dedicated line, or the like.
[0044]
The notification unit 14 of the present embodiment is a device that transmits operation information of a specific electrical device to the safety information management unit 15 or a predetermined information terminal 16 as an estimation result of the non-intrusive monitoring system 1. Furthermore, the notifying unit 14 of the present embodiment also transmits the operation information of the electric device 3 other than the specific electric device, for example, the television receiver 3a, as the estimation result of the non-intrusive monitoring system 1, to the safety information managing unit 15 or the predetermined information. The information is transmitted to the information terminal 16. The notifying unit 14 of the present embodiment transmits the operation information to the safety information when the power of the target electric device (the toilet lighting device including the incandescent lamp 3f or the television receiver 3a) is turned on from off or from on to off. The information is transmitted to the management means 15 or a predetermined information terminal 16. The operation information includes, for example, a target person ID for specifying the target person (the power consumer 2) and an electric device ID for specifying the target electric device (for example, in the present embodiment, the incandescent lamp 3f and the television receiver 3a). And a code specifying the operation state of the electric device 3 (for example, in the present embodiment, a code indicating whether the power has been turned on from off or from on to off) ) Is included.
[0045]
The safety information management unit 15 includes, for example, a unit that receives the operation information of the target electric device transmitted from the notification unit 14, a unit that records and manages the received operation information of the target electric device, and a unit that records and manages the received operation information. The computer has means for outputting a part or all of the operation information of the target electric device to an output device such as a display. The safety information management means 15 is operated by a safety confirmation company that performs safety confirmation of the target person. Based on the operation information of the target electric device received by the safety information management means 15, the safety confirmation business operator determines the operation frequency, operation time, operation time zone, and the like of the toilet lighting device including the incandescent lamp 3f or the television receiver 3a. The subject can be grasped, and it can be determined whether or not the subject is living a healthy life. As a result, if any abnormality is confirmed (for example, the toilet lighting device including the incandescent lamp 3f or the power of the television receiver 3a is turned off for one day or more), the safety confirmation business operator For example, it is possible to take measures such as contacting the subject by telephone or the like to directly confirm the safety or requesting the family of the subject or a doctor in charge to confirm the safety of the subject by telephone or the like. It is to be noted that the operation function of the computer as the safety information management means 15 determines whether or not the operation frequency, operation time, and operation time period of the target electric device are within the allowable value range, and determines whether the target electric device is out of the allowable value range. In some cases, a warning sound, a warning light, a warning message, or the like may be output to alert the safety confirmation business operator, the family of the target person, the doctor in charge, or the like.
[0046]
The information terminal 16 includes a unit that receives the operation information of the target electric device transmitted from the notifying unit 14 and a unit that outputs the received operation information of the target electric device to an output device such as a display or a speaker. For example, a personal computer, a telephone, a mobile telephone, or the like owned by the family of the subject, the doctor in charge, or the like. When the information terminal 16 corresponding to the target person is set in advance, information on the information terminal 16 to which the operation information of the target electric device should be transmitted (for example, telephone number, e-mail, Address, IP address, etc.) are stored in advance. In this case, a system can be constructed in which the notification means 14 directly notifies the target person's family, the doctor in charge, and the like of the operation information of the target electric device without the intervention of the safety information management means 15 and the safety confirmation business operator. When it is inconvenient to communicate between the notifying unit 14 and the information terminal 16 every time the operation state of the target electric device changes, the notifying unit 14 sets the notification unit 14 at a certain time interval within the certain time period. The operation information of the target electric device may be transmitted to the information terminal 16 collectively. Further, in this case, the operation information of the target electric device may be processed (for example, a temporal change in the operation state of the target electric device is represented by a graph) and transmitted to the information terminal 16.
[0047]
The notifying means 14 is not limited to directly transmitting the operation information of the target electric device to the information terminal 16, and the safety information management means 15 transmits the operation information of the target electric device to the predetermined information terminal 16. For example, it may be transmitted as an e-mail or a voice message. Further, the safety information management means 15 is configured as a WWW server, and the family or the doctor in charge of the subject accesses the safety information management means 15 using the browser software of the information terminal 16 owned by the subject, and the target electric device May be able to be browsed.
[0048]
Communication between the notification unit 14 and the safety information management unit 15 or the information terminal 16 is performed using a known wired or wireless communication technology and communication line (for example, a telephone line, an Internet dedicated line, or a PHS (Personal Handy phone System)). Network, a mobile telephone network, a cable television line, etc.) as appropriate. The notification unit 14, the safety information management unit 15, and the information terminal 16 are configured to include the adopted communication technology and hardware or software that enables communication via a communication line.
[0049]
According to the safety confirmation system for the occupants of the power consumers configured as described above, it is possible to non-invasively confirm the safety of the target person as follows. That is, the measurement sensors PT111a and 111b and the CTs 112a and 112b are arranged at the service entrance of the power consumer 2 on the service line 4, and the non-invasive monitoring system 1 is actually operated to control the target electrical equipment of the power consumer 2. Estimate the operating state. Note that the combination of the operation states of the electric devices 3 of the power consumer 2 may be a combination of the operation states of the electric devices 3 different from the above-described teacher data.
[0050]
The measurement data of the electric device 3 in the power consumer 2, that is, the measurement data (voltage V) from the measurement sensors PT111a, 111b and CT112a, 112b. A , V B , Current I A , I B ) Is data not used for learning as teacher data, for example. The measurement data from the PTs 111a and 111b and the CTs 112a and 112b are input to the data extracting unit 12.
[0051]
In the data extracting means 12, the analog voltage data V A , V B And analog current data I A , I B Is converted into digital data by the A / D converter 121. Using the digital data from the A / D converter 121, the fast Fourier converter 122 outputs the current data I A (1-13) , I B (1-13) And phase difference data φ A (1-13) , Φ B (1-13) Get.
[0052]
These fundamental and harmonic current data I A (1-13) , I B (1-13) And phase difference data φ A (1-13) , Φ B (1-13) Is supplied to the neural network 13. In the neural network 13, the estimation unit 131 refers to the pattern of the currently input measurement data, recognizes the pattern based on the estimation ability obtained by learning, and determines the result of the pattern recognition by the estimation result of the neural network 13 (in FIG. ("Operation state of target electrical equipment" is displayed).
[0053]
The notifying unit 14 transmits the operation information of the target electric device to the safety information managing unit 15 or the predetermined information terminal 16 as the estimation result of the non-intrusive monitoring system 1 by a known communication technology. Based on the operation information of the target electric device received by the safety information management means 15, the safety confirmation business operator determines the operation frequency, operation time, operation time zone, and the like of the toilet lighting device including the incandescent lamp 3f or the television receiver 3a. By grasping, it can be determined whether or not the subject is living a healthy life. Also, based on the operation information of the target electric device received by the information terminal 16, the family of the target person, the doctor in charge, and the like also determine the operation frequency, operation time, and the like of the toilet lighting device including the incandescent lamp 3f or the television receiver 3a. By grasping the operation time zone and the like, it is possible to directly determine whether or not the subject is living a healthy life without going through a safety confirmation business operator.
[0054]
According to the method and system for confirming the safety of the occupants of the power consumers of the present invention, the non-invasive monitoring system 1 is installed at the feed line entrance position, and the harmonic signal injection device 6 is attached to the specific electric equipment. The operation state of a specific electric device can be grasped with a simple configuration without adding or incorporating an information processing function such as a microcomputer or a communication function such as a wireless communication device to the electric device. Furthermore, the present invention does not mean that the electric equipment itself communicates with the information processing device outside the power consumer, but confirms the safety of the subject by a non-invasive method that does not enter the house of the power consumer 2. Can be configured so as to minimize the awareness that the subject is being monitored by a third party.
[0055]
Further, according to the non-intrusive monitoring system 1 adopted in the present embodiment, it is possible to estimate the operation state of the plurality of electric devices 3 including the inverter device, and not only the operation information of the specific electric device but also other electric devices. There is an advantage that it is possible to judge the safety of the target person comprehensively by adding the operation information of the device 3. Furthermore, even when the power consumption of the specific electric device is relatively small compared to the other electric devices 3 and does not generate much harmonics, it is relatively difficult to identify the operation state only by the non-intrusive monitoring system 1. The non-invasive monitoring system 1 ensures the operating state of the specific electric device by flowing the characteristic harmonic to the indoor wiring circuit 17 when the specific electric device is turned on by connecting the harmonic signal injection device 6. Can be identified.
[0056]
The above embodiment is an example of a preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications can be made without departing from the gist of the present invention. For example, the application of the present invention is applicable not only to detached houses, but also to apartment houses such as apartments, facilities for the elderly, hospitals, and the like. In this case, for example, the harmonic signal injection device 6 may be attached to a specific electric device in each house (room), and the non-invasive monitoring system 1 may be attached to the distribution board of each house (room). Further, the non-intrusive monitoring system 1 is not attached to each house (room), and for example, the harmonic signal injection device 6 of each house (room) generates a unique harmonic current, and thus a plurality of houses (rooms). The collective non-intrusive monitoring system 1 may be installed upstream of the power supply line.
[0057]
Further, in the above-described embodiment, the number of specific electric devices is one in the power consumer 2, but may be two or more. In this case, for example, the harmonic signal injection device 6 is configured so that the frequency, amplitude, and phase difference of the injection signal (AC current) with respect to the fundamental voltage can be appropriately adjusted, and the harmonics attached to each of the plurality of specific electric devices What is necessary is just to make each signal injection device 6 generate a unique harmonic current. Thereby, in the non-intrusive monitoring system 1, the state when a plurality of specific electric devices operate independently or simultaneously can be uniquely and definitely identified for each specific electric device.
[0058]
In the above-described embodiment, the non-intrusive monitoring system 1 employs a system capable of estimating the individual operating states of the plurality of electric devices 3 in the power consumer 2. It is not necessary to estimate the individual operation state of the specific electric device, and the operation state of only the specific electric device may be estimated. In this case, for example, learning of the neural network 13 is performed as follows. That is, the switches 18 to 23 provided to each of the plurality of electric devices 3 shown in FIG. 3 are turned on and off, and furthermore, the current of the inverter device is arbitrarily set, so that the plurality of electric devices 3 enter various operating states. make. For each of the situations, that is, for each combination of various operating states of the plurality of electric devices 3, the harmonic current and the harmonic current are measured using the PT 111 a and 111 b and the CT 112 a and 112 b as the measurement sensors and the data extraction unit 12. Is measured with respect to the phase with respect to the fundamental voltage. The measured data and the operating state of the specific electric device in a state corresponding to the measured data (that is, whether the power of the specific electric device is on or off) are transmitted to the neural network as teacher data. Give and learn. Thereby, the non-intrusive monitoring system 1 recognizes the difference in the pattern of the harmonic current caused by the operation of the specific electric device (that is, the operation of the harmonic signal injection device 6), and identifies from the difference. The operation state of the electric device can be uniquely and definitely identified.
[0059]
In the above-described embodiment, an example in which a neural network is used as a pattern recognition means has been mainly described. However, the present invention is not particularly limited to this. For example, a nearest neighbor method for searching for a nearest example, a large margin A class fire or other known or new estimation algorithm may be employed.
[0060]
Furthermore, the present invention can also be configured as a method and a system for estimating the operation state of a specific electric device. That is, in the method for estimating the operation state of a specific electric device, the harmonic current having a characteristic not present in the harmonic current generated by the electric device in the electric power consumer in accordance with the operation of the specific electric device in the electric power consumer is generated. Make it flow to the indoor wiring circuit in the customer, measure the total load current and voltage near the power line entrance of the power customer, and use the measured total load current and voltage to calculate the harmonic current and voltage of the total load current. , And the operating state of the specific electric device is estimated based on the obtained phase difference between the harmonic current and the voltage relative to the total load current. In addition, a system for estimating the operating state of a specific electric device in which the above-described method is implemented is attached to a specific electric device among the electric devices 3 in the electric power consumer 2, and the electric power consumer 2 is operated in accordance with the operation of the specific electric device. Signal injection device 6 for flowing a harmonic current having characteristics that are not included in the harmonic current generated by the electric equipment 3 in the interior to the indoor wiring circuit 17 in the power consumer 2, and a feed line entrance of the power consumer 2 From the total load current and voltage measured in the vicinity, the phase difference between the harmonic current and the harmonic current of the total load current is calculated, and the harmonic current and the harmonic current of the calculated total load current are calculated. And a non-intrusive monitoring system 1 for estimating the operation state of the specific electric device based on the phase difference of
[0061]
In this case, the estimation result of the operating state of the specific electric device is not limited to the one used for confirming the safety of the occupant of the customer. For example, one of the important information on the side of the power consumer 2 for an electric power company, a manufacturer or a distributor of the electric appliance includes information on the configuration and actual use of the electric appliance held by the electric power consumer 2. This information can be used to evaluate the effect of demand side management (DSM), predict potential demand, analyze the factors that reduce the load factor, build an extremely detailed seasonal tariff system, and provide various services to consumers. Indispensable. Therefore, the estimation result of the operation state of the specific electric device can be used as one of useful information on the configuration and actual use of the electric device held by the power consumer 2. In this case, the specific electrical device does not need to be able to estimate whether or not the customer occupant is living a healthy life.
[0062]
Further, in the above-described embodiment, the harmonic signal injection device 6 is configured separately from the electric device, but the harmonic signal injection device 6 may be built in the electric device. Conventionally, an electric device that generates harmonics, which has conventionally been considered to be reduced, within a range that does not affect the operation of the electric device, is a novel device that has never existed before. Then, according to the electric device including the harmonic signal injection device 6, it is possible to non-invasively and highly reliably estimate the operation state of the electric device as described above. Furthermore, the estimation result can be used as confirmation of the safety of the occupants of the customer, useful information on the configuration and use of the electric equipment held by the electric power consumer 2, and the like.
[0063]
【The invention's effect】
As is apparent from the above description, according to the method for estimating the operating state of a specific electric device according to claim 1 and the system for estimating the operating state of a specific electric device according to claim 2, the same or similar harmonic current is generated. Even when a plurality of electric devices are connected in the electric power consumer, the operating state of a specific electric device can be estimated non-invasively.
[0064]
Further, according to the method for confirming the safety of the occupants of the power consumer according to claim 3 and the system for confirming the safety of the occupants of the power customer, the information processing function such as a microcomputer or the wireless It is possible to grasp the operating state of a specific electric device with a simple configuration without adding or incorporating a communication function such as a communication device. Furthermore, the safety of the occupants of the power consumer can be confirmed by a non-invasive method that does not enter the house of the power consumer, and the electric device itself communicates with an information processing device outside the power consumer. Since it is not necessarily the case, it is possible to configure so that the occupants of the electric power consumer are not conscious of being monitored by a third party as much as possible.
[0065]
Further, according to the safety confirmation system for the occupants of the electric power consumers, it is possible to reliably generate a characteristic harmonic current which is not included in the harmonic current generated by general electric equipment.
[0066]
Further, according to the system for confirming the safety of the occupants of the electric power demander according to claim 6, it is not necessary to incorporate the harmonic signal injection device into the specific electric equipment or the indoor wiring circuit. A harmonic signal injection device can be easily mounted between the circuit and the circuit.
[0067]
Furthermore, according to the electric device provided with the harmonic signal injection device according to claim 7, the operation state of the electric device can be estimated based on the presence or absence of a characteristic harmonic, and further, based on the estimation result. Thus, it can be determined whether or not the occupants of the power consumer are living healthy.
[Brief description of the drawings]
FIG. 1 is a diagram showing an electric system of a power consumer to which a method and a system for confirming the safety of the occupants of a power consumer according to an embodiment of the present invention are applied.
FIG. 2 is a schematic configuration diagram illustrating an example of a configuration of a non-intrusive monitoring system.
FIG. 3 is a schematic block diagram showing only an electric circuit in FIG. 1;
FIG. 4 is a diagram showing an example of input data used as teacher data of the non-intrusive monitoring system, and showing a state where a specific electric device is not operating.
FIG. 5 is a diagram showing an example of input data used as teacher data of the non-intrusive monitoring system and showing a state in which a specific electric device is operating.
FIG. 6 is a schematic block diagram showing a case where a harmonic signal injection device is attached to an indoor wiring circuit so as to be in parallel with a specific electric device.
FIG. 7 is a schematic block diagram showing a case where a harmonic signal injection device is attached to an indoor wiring circuit so as to be in series with a specific electric device.
[Explanation of symbols]
1 Non-intrusive monitoring system
2 Electricity consumers
3 electrical equipment
4 Service lines
4a Phase A
4b B phase
4n neutral wire
12 Data extraction means
13 Neural Network as Pattern Recognition Means
14 Notification means
15 Safety information management means
16 Information terminals
111a, 111b PT (Transformer for instrument)
112a, 112b CT (current transformer for instrument)
121 A / D converter
122 Fast Fourier Transformer
131 Estimation means

Claims (7)

電力需要家内の特定の電気機器の動作に伴って、前記電力需要家内の電気機器が発生する高調波電流にはない特徴を有する高調波電流が前記電力需要家内の屋内配線回路に流れるようにし、前記電力需要家の給電線引込口付近で総負荷電流及び電圧を測定し、当該測定した総負荷電流及び電圧から当該総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差を求め、当該求めた前記総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差に基づいて前記特定電気機器の動作状態を推定するようにしたことを特徴とする特定電気機器の動作状態の推定方法。With the operation of the specific electric device in the power consumer, a harmonic current having a characteristic not present in the harmonic current generated by the electric device in the power consumer flows through the indoor wiring circuit in the power consumer, A total load current and a voltage are measured in the vicinity of the power supply line entrance of the power consumer, and a phase difference of a harmonic current and a harmonic current with respect to the harmonic current and the voltage of the total load current is obtained from the measured total load current and voltage. Operating state of the specific electric device, wherein the operation state of the specific electric device is estimated based on a phase difference of a harmonic current with respect to a harmonic current and a voltage of the total load current. Estimation method. 電力需要家内の特定の電気機器に取り付けられて、前記特定電気機器の動作に伴い前記電力需要家内の電気機器が発生する高調波電流にはない特徴を有する高調波電流を前記電力需要家内の屋内配線回路に流す高調波信号注入装置と、前記電力需要家の給電線引込口付近で測定した総負荷電流及び電圧から当該総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差を求め、当該求めた前記総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差に基づいて前記特定電気機器の動作状態を推定する非侵入型モニタリングシステムとを有することを特徴とする特定電気機器の動作状態推定システム。Attached to a specific electric device in the power consumer, the harmonic current generated by the electric device in the power consumer with the operation of the specific electric device has a characteristic that is not in the harmonic current generated by the indoor device in the power consumer. From the harmonic signal injection device flowing in the wiring circuit, and the total load current and voltage measured near the power line entrance of the power consumer, the phase difference of the harmonic current with respect to the harmonic current and voltage of the total load current And a non-intrusive monitoring system for estimating the operating state of the specific electrical device based on the calculated and calculated phase difference of the harmonic current with respect to the harmonic current and voltage of the total load current. An operating state estimation system for specific electrical equipment. 対象となる電力需要家の在室者の安否を確認する方法であり、前記電力需要家内の特定の電気機器の動作に伴って、前記電力需要家内の電気機器が発生する高調波電流にはない特徴を有する高調波電流が前記電力需要家内の屋内配線回路に流れるようにし、前記電力需要家の給電線引込口付近で総負荷電流及び電圧を測定し、当該測定した総負荷電流及び電圧から当該総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差を求め、当該求めた前記総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差に基づいて前記特定電気機器の動作状態を推定し、当該推定した結果を、前記在室者の安否情報を管理する手段または前記在室者に対応する予め定められた情報端末機に通知するようにしたことを特徴とする電力需要家在室者の安否確認方法。This is a method for confirming the safety of the occupants of the target power consumer, and the operation of a specific electrical device in the power consumer does not include the harmonic current generated by the electrical equipment in the power consumer. The harmonic current having the characteristic is caused to flow in the indoor wiring circuit in the power consumer, the total load current and the voltage are measured in the vicinity of the power supply line entrance of the power consumer, and the measured total load current and the voltage are used from the measured total load current and voltage. A phase difference between a harmonic current and a voltage relative to a harmonic current and a voltage of a total load current is determined, and the specific electric device is determined based on the determined phase difference between a harmonic current and a harmonic current relative to a voltage of the total load current. The operation state of the occupant is estimated, and the estimated result is notified to a means for managing the safety information of the occupant or a predetermined information terminal corresponding to the occupant. Electricity demand Safety confirmation method of occupants. 対象となる電力需要家の在室者の安否を確認するシステムであり、前記電力需要家内の特定の電気機器に取り付けられて、前記特定電気機器の動作に伴い前記電力需要家内の電気機器が発生する高調波電流にはない特徴を有する高調波電流を前記電力需要家内の屋内配線回路に流す高調波信号注入装置と、前記電力需要家の給電線引込口付近で測定した総負荷電流及び電圧から当該総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差を求め、当該求めた前記総負荷電流の高調波の電流及び電圧に対する高調波の電流の位相差に基づいて前記特定電気機器の動作状態を推定する非侵入型モニタリングシステムと、前記非侵入型モニタリングシステムの推定結果情報を管理する安否情報管理手段または前記在室者に対応する予め定められた情報端末機に、前記非侵入型モニタリングシステムの推定結果を通知する通知手段とを有することを特徴とする電力需要家在室者の安否確認システム。It is a system for confirming the safety of the occupants of the target electric power consumer, and is attached to a specific electric appliance in the electric power consumer, and the electric appliance in the electric power consumer is generated with the operation of the specific electric appliance. A harmonic signal injection device that flows a harmonic current having characteristics not present in the harmonic current to an indoor wiring circuit in the power consumer, and a total load current and a voltage measured in the vicinity of a power supply line inlet of the power consumer. The phase difference of the harmonic current with respect to the harmonic current and the voltage of the total load current is obtained, and the specific electric current is determined based on the obtained phase difference of the harmonic current with respect to the harmonic current and the voltage of the total load current. A non-intrusive monitoring system for estimating the operation state of the device; safety information management means for managing estimation result information of the non-intrusive monitoring system; The obtained information terminals, safety confirmation systems electric power consumer occupants, characterized in that it comprises a notifying means for notifying the estimated results of the non-intrusive monitoring system. 前記高調波信号注入装置は、任意の次数の高調波電流を単一で又は組み合わせて発生させることを特徴とする請求項４記載の電力需要家在室者の安否確認システム。The safety confirmation system according to claim 4, wherein the harmonic signal injection device generates harmonic currents of any order singly or in combination. 前記高調波信号注入装置は、前記特定電気機器の電流取込部に電気的に接続するインターフェースと、前記屋内配線回路の電流供給部に電気的に接続するインターフェースとを有することを特徴とする請求項４または５記載の電力需要家在室者の安否確認システム。The said harmonic signal injection device has the interface electrically connected to the electric current intake part of the said specific electric equipment, and the interface electrically connected to the electric current supply part of the said indoor wiring circuit, Claims characterized by the above-mentioned. Item 4. The system for confirming the safety of occupants of a power consumer according to item 4 or 5. 電力需要家内の屋内配線回路に接続されて使用される電気機器において、該電気機器の動作時に、前記電力需要家内の電気機器が発生する高調波電流にはない特徴を有する高調波電流を前記電力需要家内の屋内配線回路に流す高調波信号注入装置を備えたことを特徴とする電気機器。In an electric device used by being connected to an indoor wiring circuit in a power consumer, when the electric device operates, a harmonic current having a characteristic not present in a harmonic current generated by the electric device in the power consumer is generated by the electric power. An electric device comprising a harmonic signal injection device for flowing into an indoor wiring circuit in a customer.
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