JP6420457B2 - 電力変換装置、分電盤及び運転切替方法 - Google Patents
電力変換装置、分電盤及び運転切替方法 Download PDFInfo
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- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
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- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
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- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
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- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00028—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment involving the use of Internet protocols
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- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/10—The network having a local or delimited stationary reach
- H02J2310/12—The local stationary network supplying a household or a building
- H02J2310/14—The load or loads being home appliances
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- H—ELECTRICITY
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- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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- H—ELECTRICITY
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- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
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Description
電力変換装置は、分散電源の出力の抑制を指示するメッセージ(以下、出力抑制メッセージ)を外部サーバから受信する必要があるため、外部サーバと電力変換装置との間の通信が切断されると、分散電源の出力を停止することが想定される。詳細には、電力変換装置は、外部サーバと電力変換装置との間の通信異常が一定期間(例えば、5分)に亘って継続する場合に、分散電源の出力を停止する。
以下において、実施形態に係る電力管理システムについて説明する。図1は、実施形態に係る電力管理システム1を示す図である。
以下において、実施形態に係る電力変換装置について説明する。図2は、実施形態に係るPCS130を示す図である。
実施形態では、自立運転状態においてインバータから出力される電力が連系運転状態においてインバータ133に接続されていた負荷150に対して供給されることを前提としている。このような前提下において、PCS130は、太陽電池110の動作停止を指示するメッセージ(動作停止指示)を受信した場合に、連系運転状態から自立運転状態への変更を行う。自立運転状態においては、外部サーバ400とPCS130との間の通信が切断された状態であっても、インバータ133の動作を停止しなくてもよい。すなわち、太陽電池110の出力を停止しなければならない事象が生じても、蓄電池120の充電及び放電を継続することができる。さらには、太陽電池110の発電も継続することができる。
以下において、他の実施形態について説明する。以下においては、上述した実施形態に対する差異について説明する。
以下において、他の実施形態に係る制御方法について説明する。図6及び図7は、他の実施形態に係る制御方法を示すフロー図である。
他の実施形態では、自立運転状態においてインバータから出力される電力が連系運転状態においてインバータ133に接続されていた負荷150に対して供給されることを前提としている。このような前提下において、PCS130は、外部サーバ400とPCS130との間の通信の切断を検出した場合に、連系運転状態から自立運転状態への変更を行う。自立運転状態においては、外部サーバ400とPCS130との間の通信が切断された状態であっても、インバータ133の動作を停止しなくてもよい。すなわち、太陽電池110の出力を停止しなければならない事象が生じても、蓄電池120の充電及び放電を継続することができる。さらには、太陽電池110の発電も継続することができる。
以下において、他の実施形態について説明する。以下においては、上述した実施形態に対する差異について説明する。
本発明は上述した実施形態によって説明したが、この開示の一部をなす論述及び図面は、この発明を限定するものであると理解すべきではない。この開示から当業者には様々な代替実施形態、実施例及び運用技術が明らかとなろう。
Claims (12)
- 電力指令メッセージを外部サーバとの通信により受信する通信部と、
前記外部サーバとの通信状態が所定の閾値以下であると判断された場合に、電力系統と連系された連系運転状態から電力系統と解列された自立運転状態に運転状態を変更する制御部とを備えることを特徴とする電力変換装置。 - 分散電源から入力されるDC電力の電圧を変換する第1直流コンバータと、
蓄電池から入力されるDC電力の電圧を変換する第2直流コンバータと、
前記第1直流コンバータから入力されるDC電力及び前記第2直流コンバータから入力されるDC電力をAC電力に変換するインバータとを備え、
前記自立運転状態において前記インバータから出力される電力は、前記連系運転状態において前記インバータに接続されていた負荷に対して連続的に供給されることを特徴とする請求項1に記載の電力変換装置。 - 前記連系運転状態から前記自立運転状態への変更期間においても、前記インバータから出力される電力は、前記負荷に対して連続的に供給されることを特徴とする請求項2に記載の電力変換装置。
- 前記制御部は、前記インバータから出力可能な電力によって前記負荷の消費電力を賄える場合に、前記連系運転状態から前記自立運転状態への変更を行うことを特徴とする請求項2又は請求項3に記載の電力変換装置。
- 前記制御部は、前記外部サーバと前記電力変換装置との間の通信が復帰した場合に、前記自立運転状態から前記連系運転状態に前記電力変換装置の動作状態を変更することを特徴とする請求項2乃至請求項4のいずれかに記載の電力変換装置。
- 前記制御部は、前記外部サーバと前記電力変換装置との間の通信が復帰した場合に、前記自立運転状態から前記連系運転状態に前記電力変換装置の動作状態を自動的に変更しないことを特徴とする請求項2乃至請求項4のいずれかに記載の電力変換装置。
- 前記インバータと電力系統とを接続する第1電力線上に設けられる第1リレースイッチと、
前記インバータと負荷とを接続する第2電力線上に設けられる第2リレースイッチと、
前記第1電力線と前記第2電力線とを接続する第3電力線上に設けられる第3リレースイッチとを備え、
前記制御部は、
前記電力変換装置の動作状態を前記連系運転状態から前記自立運転状態に変更する場合に、前記第3リレースイッチが閉状態のまま、前記第1リレースイッチを閉状態から開状態に切替えるとともに、前記第2リレースイッチを開状態から閉状態に切替えた後に、前記第3リレースイッチを閉状態から開状態に切り替えることを特徴とする請求項2乃至請求項6のいずれかに記載の電力変換装置。 - 前記制御部は、前記自立運転状態から前記連系運転状態に前記電力変換装置の動作状態を変更する場合に、前記第3リレースイッチを開状態から閉状態に切り替えた後に、前記第2リレースイッチを閉状態から開状態に切替えるとともに、前記第1リレースイッチを開状態から閉状態に切替えることを特徴とする請求項7に記載の電力変換装置。
- 前記制御部は、前記第1直流コンバータ、前記第2直流コンバータ及び前記インバータの動作を停止せずに、前記連系運転状態から前記自立運転状態への変更を行うことを特徴とする請求項2乃至請求項8のいずれかに記載の電力変換装置。
- 前記制御部は、前記分散電源の出力の抑制が正しく実行されたか否かを検証するための検証記録を出力し、
前記制御部は、前記連系運転状態から前記自立運転状態への変更を行った場合に、前記検証記録としてゼロを出力することを特徴とする請求項2乃至請求項9のいずれかに記載の電力変換装置。 - 分散電源と電力系統との接続を連系又は解列する切替部を備え、
前記切替部は、電力指令メッセージを送信するサーバと前記分散電源を制御する電力変換装置との通信状態が所定の閾値以下であると判断された場合に、電力系統と連系された連系運転状態から電力系統と解列された自立運転状態に運転状態を切り替えることを特徴とする分電盤。 - 電力指令メッセージを外部サーバとの通信により電力変換装置が受信するステップと、
前記外部サーバと前記電力変換装置との間の通信状態が所定の閾値以下であると判断された場合に、電力系統と連系された連系運転状態から電力系統と解列された自立運転状態に運転状態を変更するステップとを備えることを特徴とする運転切替方法。
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