JP2000224766A - Time synchronizing method in distributed power monitoring control system - Google Patents
Time synchronizing method in distributed power monitoring control systemInfo
- Publication number
- JP2000224766A JP2000224766A JP11019265A JP1926599A JP2000224766A JP 2000224766 A JP2000224766 A JP 2000224766A JP 11019265 A JP11019265 A JP 11019265A JP 1926599 A JP1926599 A JP 1926599A JP 2000224766 A JP2000224766 A JP 2000224766A
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- Prior art keywords
- time
- master
- slave
- current time
- distributed power
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、電力系統の監視
制御を複数のコンピュータ等により行う分散型電力監視
制御システムにおける時刻同期方式に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a time synchronization system in a distributed power monitoring and control system in which a plurality of computers monitor and control a power system.
【０００２】[0002]
【従来の技術】図１は分散型電力監視制御システムの構
成を示し、１−１，１−２は常用系のデータ中継装置、
１−３，１−４は待機系のデータ中継装置である。電力
系統、電力設備等の監視制御対象は、ＴＣ（遠方監視制
御装置）等を介して監視制御側と接続される。各データ
中継装置１−１〜１−４はＴＣと監視制御側とのインタ
フェースの役目をし、ＴＣの機種毎に異なる伝送フォー
マットと監視制御側で取り扱う共通データフォーマット
との交換を行う。２−１，２−２はイーサネット等のＬ
ＡＮ３を介してデータ中継装置１−１，１−３とそれぞ
れ接続された常用系及び待機系の監視制御サーバであ
り、監視制御対象の状態を監視し、それらの事故、故障
等をオペレータに通知する。又、監視制御対象の状態を
最適に維持するための制御を実行し、この監視制御の実
行の結果を操作、故障記録として保存する。又、必要に
応じてプリンタに印刷する。2. Description of the Related Art FIG. 1 shows the configuration of a distributed power monitoring and control system, where 1-1 and 1-2 are ordinary data relay devices,
1-3, 1-4 are standby data relay devices. Monitoring and control targets such as a power system and power equipment are connected to a monitoring and control side via a TC (distant monitoring and control device) or the like. Each of the data relay devices 1-1 to 1-4 serves as an interface between the TC and the monitoring control side, and exchanges a transmission format different for each TC model with a common data format handled by the monitoring control side. 2-1 and 2-2 are L such as Ethernet
It is a regular and standby supervisory control server connected to the data relay devices 1-1 and 1-3 via the AN3, respectively, monitors the status of the supervisory control target, and notifies the operator of those accidents and failures. I do. Also, control is performed to maintain the state of the monitoring control target optimally, and the result of the execution of the monitoring control is stored as an operation and failure record. Further, printing is performed on a printer as necessary.
【０００３】４−１，４−２はＬＡＮ３を介してデータ
中継装置１−２，１−４と接続された常用系及び待機系
の実績データサーバであり、監視制御対象の運転実績を
日報、月報、年報等の形式で蓄積、保存し、また必要に
応じてプリンタに印刷する。[0003] Reference numerals 4-1 and 4-2 denote service data servers of a normal system and a standby system connected to the data relay devices 1-2 and 1-4 via the LAN 3, and provide daily reports on the operation results of the monitored and controlled objects. It is stored and stored in the form of a monthly report, annual report, etc., and printed on a printer as needed.
【０００４】５−１〜５−３はＬＡＮ６を介して監視制
御サーバ２−１，２−２及び実績データサーバ４−１，
４−２と接続されたＣＲＴ制御卓用ＣＰＵであり、監視
制御対象を監視制御するＣＲＴ制御卓を制御する。７は
当該システムの基準時計として設けられた親局時計装置
であり、ＦＭアンテナ８を介してＦＭ電波をキャッチす
る。各構成要素１−１〜１〜４、２−１，２−２、４−
１，４−２、５−１〜５−３はコンピュータにより構成
されている。[0004] 5-1 to 5-3 are monitoring control servers 2-1 and 2-2 and performance data servers 4-1 and 4-1 via LAN6.
The CPU for a CRT control console connected to 4-2 controls a CRT control console that monitors and controls a monitoring control target. Reference numeral 7 denotes a master station clock device provided as a reference clock of the system, and catches an FM radio wave via an FM antenna 8. Each component 1-1 to 1-4, 2-1 to 2-2, 4-
1, 4-2 and 5-1 to 5-3 are configured by a computer.
【０００５】上記構成において、親時計装置７は、ＦＭ
電波を利用して、１日に１回程度時刻補正を行うことに
より、システムの運用に支障のない範囲で動作する。二
重化された監視制御サーバ２−１，２−２のうち常用系
の監視制御サーバ２−１は親時計装置７から時刻を取り
込み、他の装置、即ち待機系の監視制御サーバ２−２、
データ中継装置１−１〜１−４、実績データサーバ４−
１，４−２、及びＣＰＵ５−１〜５−３に対して時刻通
知を行い、各装置の内部時計を同期させる。[0005] In the above configuration, the master clock device 7 is an FM
By performing time correction once a day using radio waves, the system operates within a range that does not hinder system operation. Of the redundant monitoring control servers 2-1 and 2-2, the monitoring monitoring server 2-1 of the service system fetches the time from the master clock device 7, and the other devices, that is, the monitoring control server 2-2 of the standby system,
Data relay devices 1-1 to 1-4, performance data server 4-
1, 4-2 and the CPUs 5-1 to 5-3 are notified of time, and the internal clocks of the respective devices are synchronized.
【０００６】[0006]
【発明が解決しようとする課題】上記したように常用系
の監視制御サーバ２−１からシステムを構成する他の装
置へ現在時刻を通知する場合、各ＬＡＮ３，６を介して
通知することになるが、ＬＡＮ３，６の負荷変動を予測
できないため、時刻通知の際にＬＡＮ３，６の負荷が高
い場合には伝送遅れが生じ、この伝送遅れ分だけ時刻が
ずれることになった。しかも、送信側の常用系の監視制
御サーバ−２−１では、この伝送遅れを検出できないた
め、次回の時刻同期の実行時まで各装置の時刻はずれた
ままになってしまった。As described above, when the current time is notified from the monitoring and control server 2-1 of the service system to other devices constituting the system, the notification is made via the LANs 3 and 6. However, since the load fluctuation of the LANs 3 and 6 cannot be predicted, a transmission delay occurs when the load on the LANs 3 and 6 is high at the time of time notification, and the time is shifted by the amount of the transmission delay. In addition, since the transmission-side supervisory control server-2-1 cannot detect this transmission delay, the time of each device remains off until the next time synchronization is executed.
【０００７】この発明は上記のような課題を解決するた
めに成されたものであり、システムを構成する各構成要
素の時計を正確に同期させることができる分散型電力監
視制御システムにおける時刻同期方式を得ることを目的
とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has a time synchronization method in a distributed power monitoring and control system capable of accurately synchronizing clocks of components constituting the system. The purpose is to obtain.
【０００８】[0008]
【課題を解決するための手段】この発明に係る分散型電
力監視制御システムにおける時刻同期方式は、複数の構
成要素のうちの一つをマスタとするとともに、他の一つ
をスレーブとし、マスタは親時計装置から取り込んだ現
在時刻Ｔ１を保存するとともに、スレーブに対して現在
時刻の受信要求を送信し、この受信要求を受信したスレ
ーブは自己の現在時刻Ｔ２をマスタに送信し、現在時刻
Ｔ２を受信したマスタは自己の現在時刻Ｔ３を保存する
とともに、Ｔ３−Ｔ１＜ｔ0×２＋α（ただし、ｔ0は設
計値から得られる最短伝送遅れ時間、αは処理遅れ時間
等を考慮した調整時間である。）の関係が成立するか否
かの判定を行い、この関係が成立した場合にはΔＴ＝Ｔ
１＋ｔ0−Ｔ2からマスタとスレーブの時刻のずれΔＴを
演算し、このΔＴを時刻補正値としてスレーブの時計を
補正するようにしたものである。According to a time synchronization system in a distributed power monitoring and control system according to the present invention, one of a plurality of components is used as a master, the other is used as a slave, and the master is used as a master. The current time T1 fetched from the master clock device is stored, and a reception request of the current time is transmitted to the slave. The slave receiving this reception request transmits its own current time T2 to the master and sets the current time T2. The received master saves its own current time T3, and T3−T1 <t 0 × 2 + α (where t 0 is the shortest transmission delay time obtained from the design value, and α is an adjustment time considering the processing delay time and the like. It is determined whether or not the relationship is established. If this relationship is established, ΔT = T
A time difference ΔT between the master and the slave is calculated from 1 + t 0 −T 2 , and the time of the slave is corrected using the ΔT as a time correction value.
【０００９】又、請求項２に係る分散型電力監視制御シ
ステムにおける時刻同期方式は、上記した複数の構成要
素をコンピュータにより構成したものである。Further, a time synchronization system in a distributed power monitoring and control system according to a second aspect of the present invention is a system in which a plurality of the above-described components are configured by a computer.
【００１０】[0010]
【発明の実施の形態】以下、この発明の実施の形態を図
面とともに説明する。分散型電力監視制御システムの構
成は図１と同じである。次に、時刻を同期させるための
制御動作を監視制御サーバ２−１をマスタとし、実績デ
ータサーバ４−１をスレーブとした例について図２のタ
イムチャートを用いて説明する。まず、監視制御サーバ
２−１は親時計装置７から取り込んだ現在時刻Ｔ１を保
存し、実績データサーバ４−１にＬＡＮ６を介して現在
時刻の受信要求を送信する。実績データサーバ４−１
は、現在時刻受信要求を受信すると、直ちに自装置の現
在時刻Ｔ２を監視制御サーバ２−１に返送する。ここ
で、実績データサーバ４−１から返送されてくる時刻Ｔ
２は、Ｔ２＝Ｔ１＋伝送遅れ時間となり、監視制御サー
バ２−１と実績データサーバ４−１との時刻のずれΔＴ
は、ΔＴ＝Ｔ１＋伝送遅れ時間−Ｔ２となる。そこで、
以下の方法により伝送遅れ時間を決定し、ΔＴを求め
る。Embodiments of the present invention will be described below with reference to the drawings. The configuration of the distributed power monitoring and control system is the same as that of FIG. Next, an example in which the control operation for synchronizing the time is set as the monitoring control server 2-1 as the master and the performance data server 4-1 as the slave will be described with reference to the time chart of FIG. First, the monitoring control server 2-1 saves the current time T1 fetched from the master clock device 7, and transmits a request for receiving the current time via the LAN 6 to the performance data server 4-1. Performance data server 4-1
Immediately returns the current time T2 of the own device to the monitoring control server 2-1 upon receiving the current time reception request. Here, the time T returned from the performance data server 4-1.
2 is T2 = T1 + transmission delay time, and the time difference ΔT between the monitoring control server 2-1 and the actual data server 4-1
Is ΔT = T1 + transmission delay time−T2. Therefore,
The transmission delay time is determined by the following method, and ΔT is obtained.
【００１１】監視制御サーバ２−１は上記したように実
績データサーバ４−１から時刻Ｔ２の返送を受信する
と、自装置の現在時刻Ｔ３を保存し、Ｔ３−Ｔ１＜最短
伝送遅れ時間（ｔ0）×２＋αの関係が成立するか否か
を判定する。ここで、最短伝送遅れ時間ｔ0は設計値か
ら得られ、αは処理遅れ時間等を考慮した調整時間であ
る。上記の判定式（不等式）が成立しない場合には、Ｌ
ＡＮ６の伝送遅れ時間が最短伝送遅れ時間ｔ0でないこ
とになり、監視制御サーバ２−１と実績データサーバ４
−１の時刻のずれΔＴが特定されなくなり、今回の時刻
同期処理を中止する。When the monitoring control server 2-1 receives the return of the time T2 from the performance data server 4-1 as described above, the monitoring control server 2-1 stores the current time T3 of its own device, and T3-T1 <shortest transmission delay time (t 0 It is determined whether or not the relationship of (2) × 2 + α is established. Here, the shortest transmission delay time t 0 is obtained from a design value, and α is an adjustment time in consideration of a processing delay time or the like. If the above determination equation (inequality) does not hold, L
Since the transmission delay time of the AN 6 is not the shortest transmission delay time t 0 , the monitoring control server 2-1 and the actual data server 4
The time deviation ΔT of −1 is no longer specified, and the current time synchronization process is stopped.
【００１２】上記の判定式が成立した場合には、ＬＡＮ
６の伝送遅れ時間が最短伝送遅れ時間ｔ0であったこと
が確認され、上記したΔＴ＝Ｔ１＋伝送遅れ時間
（ｔ0）−Ｔ２の式から時刻のずれΔＴを演算し、この
ΔＴを時刻補正値として監視制御サーバ２−１は実績デ
ータサーバ４−１に時計補正要求を送信する。実績デー
タサーバ４−１は時計補正要求を受信すると、この時刻
補正値に応じて自装置の時計を補正する。図３は上記し
た時刻同期制御の制御動作を示すフローチャートであ
る。なお、他の装置を次々とスレーブとして上記と同様
の時刻同期制御を行うことにより、すべての装置の時刻
を同期させることができる。If the above determination formula is satisfied, the LAN
6 was the shortest transmission delay time t 0 , and a time deviation ΔT was calculated from the above equation ΔT = T 1 + transmission delay time (t 0 ) −T 2, and this ΔT was corrected for time. As a value, the monitoring control server 2-1 transmits a clock correction request to the performance data server 4-1. Upon receiving the clock correction request, the performance data server 4-1 corrects its own clock in accordance with the time correction value. FIG. 3 is a flowchart showing the control operation of the time synchronization control described above. The time of all the devices can be synchronized by performing the same time synchronization control as above with other devices as slaves one after another.
【００１３】上記実施形態においては、マスタ側からス
レーブ側へ現在時刻Ｔ２を要求し、これとマスタ側の現
在時刻Ｔ１及び設計値から得られる所定の最短伝送遅れ
時間ｔ0からマスタとスレーブ間の時計のずれΔＴを演
算し、このΔＴを補正値としてスレーブの時計の補正を
行っており、コンピュータからなる構成要素間の時計の
ずれを特定することができ、各構成要素の時計を正確に
同期させることができる。In the above embodiment, the master side requests the current time T2 to the slave side, which with a predetermined minimum transmission delay time t 0 obtained from the current time T1 and the design value of the master side between the master and slave The clock shift ΔT is calculated, and the slave clock is corrected using the ΔT as a correction value. The clock shift between the components including the computer can be specified, and the clocks of the respective components can be accurately synchronized. Can be done.
【００１４】なお、上記した時刻同期方式は、複数のコ
ンピュータ間の時刻同期方式としてシステム構成に依存
しないために、いずれの分野にも適用可能である。The time synchronization method described above can be applied to any field since it does not depend on the system configuration as a time synchronization method between a plurality of computers.
【００１５】[0015]
【発明の効果】以上のようにこの発明によれば、各構成
要素間の時計のずれを特定し、この時計のずれを補正値
としてスレーブ側の構成要素の時計の補正を行ってお
り、正確な時計補正を行うことができる。As described above, according to the present invention, the clock skew between the components is specified, and the clock skew of the components on the slave side is corrected using the clock skew as a correction value. Clock correction can be performed.
【図１】この発明による分散型電力監視制御システムの
構成図である。FIG. 1 is a configuration diagram of a distributed power monitoring and control system according to the present invention.
【図２】この発明による分散型電力監視制御システムの
時刻同期の制御動作を示すタイムチャートである。FIG. 2 is a time chart showing a time synchronization control operation of the distributed power monitoring and control system according to the present invention.
【図３】この発明による分散型電力監視制御システムの
時刻同期の制御動作を示すフローチャートである。FIG. 3 is a flowchart showing a time synchronization control operation of the distributed power monitoring and control system according to the present invention.
１−１〜１−４…データ中継装置 ２−１，２−２…監視制御サーバ ３，６…ＬＡＮ ４−１，４−２…実績データサーバ ５−１〜５−３…ＣＰＵ ７…親時計装置 1-1 to 1-4 Data relay device 2-1 and 2-2 Monitoring and control server 3, 6 LAN 4-1 and 4-2 Performance data server 5-1 to 5-3 CPU 7 Parent Clock device
Claims (2)
接続された複数の構成要素により監視制御するととも
に、基準時計としての親時計装置を有する分散型電力監
視制御システムであって、各構成要素の時刻を同期させ
る時刻同期方式において、複数の構成要素のうちの一つ
をマスタとするとともに、他の一つをスレーブとし、マ
スタは親時計装置から取り込んだ現在時刻Ｔ１を保持す
るとともに、スレーブに対して現在時刻の受信要求を送
信し、この受信要求を受信したスレーブは自己の現在時
刻Ｔ２をマスタに送信し、現在時刻Ｔ２を受信したマス
タは自己の現在時刻Ｔ３を保存するとともに、Ｔ３−Ｔ
１＜ｔ0×２＋α（ただし、ｔ0は設計値から得られる最
短伝送遅れ時刻、αは処理遅れ時間等を考慮した調整時
間である。）の関係が成立するか否かの判定を行い、こ
の関係が成立した場合にはΔＴ＝Ｔ１＋ｔ0−Ｔ２から
マスタとスレーブの時刻のずれΔＴを演算し、このΔＴ
を時刻補正値としてスレーブの時計を補正するようにし
たことを特徴とする分散型電力監視制御システムにおけ
る時刻同期方式。1. A distributed power monitoring and control system which monitors and controls a monitoring and control target of a power system by a plurality of components connected via a transmission line and has a master clock device as a reference clock. In a time synchronization method for synchronizing the time of components, one of a plurality of components is used as a master, the other is used as a slave, and the master holds a current time T1 taken from a master clock device. Sends a request for receiving the current time to the slave, the slave receiving this request transmits its current time T2 to the master, and the master receiving the current time T2 saves its current time T3 and , T3-T
It is determined whether or not a relationship of 1 <t 0 × 2 + α (where t 0 is the shortest transmission delay time obtained from the design value and α is an adjustment time in consideration of the processing delay time or the like) is established. When this relationship is established, the time difference ΔT between the master and the slave is calculated from ΔT = T1 + t 0 −T2, and this ΔT
A time synchronization method in a distributed power monitoring and control system, wherein the clock of a slave is corrected as a time correction value.
により構成したことを特徴とする請求項１記載の分散型
電力監視制御システムにおける時刻同期方式。2. A time synchronization method in a distributed power monitoring and control system according to claim 1, wherein said plurality of components are constituted by a computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11019265A JP2000224766A (en) | 1999-01-28 | 1999-01-28 | Time synchronizing method in distributed power monitoring control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11019265A JP2000224766A (en) | 1999-01-28 | 1999-01-28 | Time synchronizing method in distributed power monitoring control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000224766A true JP2000224766A (en) | 2000-08-11 |
Family
ID=11994621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11019265A Pending JP2000224766A (en) | 1999-01-28 | 1999-01-28 | Time synchronizing method in distributed power monitoring control system |
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| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100813799B1 (en) | 2006-12-29 | 2008-03-13 | 엘에스산전 주식회사 | Apparatus and method for synchronizing time of electronic device in power equipments |
| JP2009011124A (en) * | 2007-06-29 | 2009-01-15 | Chugoku Electric Power Co Inc:The | Power supply system, and method for controlling power supply system |
| JP2012129718A (en) * | 2010-12-14 | 2012-07-05 | Mitsubishi Electric Corp | Communication apparatus, data processing method, and program |
| US10197974B2 (en) | 2012-09-11 | 2019-02-05 | Mitsubishi Electric Corporation | Correction parameter calculation system and method |
-
1999
- 1999-01-28 JP JP11019265A patent/JP2000224766A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100813799B1 (en) | 2006-12-29 | 2008-03-13 | 엘에스산전 주식회사 | Apparatus and method for synchronizing time of electronic device in power equipments |
| JP2009011124A (en) * | 2007-06-29 | 2009-01-15 | Chugoku Electric Power Co Inc:The | Power supply system, and method for controlling power supply system |
| JP2012129718A (en) * | 2010-12-14 | 2012-07-05 | Mitsubishi Electric Corp | Communication apparatus, data processing method, and program |
| US10197974B2 (en) | 2012-09-11 | 2019-02-05 | Mitsubishi Electric Corporation | Correction parameter calculation system and method |
| US10353346B2 (en) | 2012-09-11 | 2019-07-16 | Mitsubishi Electric Corporation | Correction parameter calculation device, system, correction parameter calculation method, and computer program |
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