JP3917467B2

JP3917467B2 - Power system monitoring control system and program

Info

Publication number: JP3917467B2
Application number: JP2002161020A
Authority: JP
Inventors: 義尚炭田; 秀樹鳥越; 啓一金田; 幸一都丸
Original assignee: Toshiba Corp
Current assignee: Toshiba Corp
Priority date: 2002-06-03
Filing date: 2002-06-03
Publication date: 2007-05-23
Anticipated expiration: 2022-06-03
Also published as: JP2004007930A

Description

【０００１】
【発明の属する技術分野】
本発明は、電力系統の主回路設備毎に回線単位制御装置を分散配置して主回路設備の状態変化を検出し、その状態変化情報をネットワークを介して監視制御装置に送信し電力系統全体を監視制御するようにした電力系統監視制御システムおよびプログラムに関する。
【０００２】
【従来の技術】
一般に、電力系統を構成する各種設備の監視制御は、電力系統の主回路設備に設けられた回線単位制御装置からの状態変化信号をネットワークを介して上位の監視制御装置に送信し、監視制御装置で監視制御することにより行われる。
【０００３】
このような電力系統監視制御システムにおいては、回線単位制御装置は電力系統の回線単位の監視制御機能を有し、監視制御装置により電力系統全体を監視制御する分散形システムとなっている。
【０００４】
すなわち、電力系統監視制御システムの適用拡大に伴い、回線単位制御装置に監視制御装置の一部機能を分散させ、監視制御装置にはさらに上位制御所内の制御システムの一部機能を分散させるようにしている。このことから、最適な機能分担を持った電力系統監視制御システムの構築が要求されるようになってきている。
【０００５】
近年のディジタル技術の進展に伴い、プロセッサの高性能化、低コスト化、およびメモリの小型化、低コスト化が進み、上記の分散処理が可能となり、最適な機能分担を可能とした電力系統監視制御システムを構築することができるようになった。これにより、監視制御装置あるいは上位制御装置への機能集中によるソフトウェアの複雑化や装置の大型化を抑制し、さらには高コスト化を抑制する。
【０００６】
この機能分担の一環として、従来は状態変化の検出を回線単位制御装置または監視制御装置で行い、状態変化情報の保存は監視制御装置で実施していたが、検出から保存まで回線単位制御装置で行うことができるようになった。
【０００７】
【発明が解決しようとする課題】
ところが、状態変化情報を回線単位制御装置で保存するようにしたことに伴い、回線単位制御装置内で保存した状態変化情報を上位の監視制御装置へ確実に送信できる信頼性の高い伝送方式の確立が要求されるようになってきた。すなわち、回線単位制御装置内で保存した状態変化情報を伝送系装置の異常や伝送異常が発生しても確実に上位の監視制御装置へ送信できる伝送方式の確立が要求されている。
【０００８】
本発明の目的は、回線単位制御装置と監視制御装置との間の伝送系装置の異常あるいはネットワーク異常中に起きた状態変化情報を喪失させることなく伝送できる電力系統監視制御システムおよびプログラムを提供することである。
【０００９】
【課題を解決するための手段】
請求項１の発明に係る電力系統監視制御システムは、電力系統の主回路設備毎に分散配置され主回路および関連装置の状態変化を検出する回線単位制御装置と、前記回線単位制御装置からの状態変化情報をネットワークを介して入力し電力系統全体を監視制御する監視制御装置とを備えた電力系統監視制御システムにおいて、回線単位制御装置は、電力系統の設備の状態信号を入力し状態変化を検出する状態変化検出手段と、前記状態変化検出手段が検出した状態変化情報を記憶する記憶手段と、前記状態変化検出手段が検出した状態変化情報を前記ネットワークを介して前記監視制御装置に送信すると共に異常の発生で前記状態変化情報の送信が失敗しその後にその異常が復帰したときは異常復帰通知を前記監視制御装置に送信し前記監視制御装置から異常状態中に起きた状態変化情報の送信要求を受信したときは異常中に起きた状態変化情報を前記監視制御装置に送信する送信手段を備えたことを特徴とする。
【００１０】
請求項１の発明に係る電力系統監視制御システムにおいては、回線単位制御装置の状態変化検出手段が検出した状態変化情報は、記憶手段に記憶されると共に、送信手段により、ネットワークを介して監視制御装置に送信される。送信手段は、伝送系の異常発生で状態変化情報の送信が失敗しその後にその異常が復帰したときは異常復帰通知を監視制御装置に送信する。そして、監視制御装置から異常状態中に起きた状態変化情報の送信要求を受信したときは異常中に起きた状態変化情報を監視制御装置に送信する。これにより、伝送系の異常中に起きた状態変化情報を喪失させることなく監視制御装置に伝送できる。
【００１１】
請求項２の発明に係る電力系統監視制御システムは、請求項１の発明において、前記監視制御装置は、前記異常復帰通知を受信したときは前記回線単位制御装置に対し、時刻を指定しその指定時刻以降の前記回線単位制御装置内の前記記憶手段に保存されている状態変化情報の送信要求を送出することを特徴とする。
【００１２】
請求項２の発明に係る電力系統監視制御システムにおいては、請求項１の発明の作用に加え、監視制御装置は、回線単位制御装置から異常復帰通知を受信したときはその回線単位制御装置に対し、時刻を指定しその指定時刻以降の回線単位制御装置内の記憶手段に保存されている状態変化情報の送信要求を送出する。回線単位制御装置は、その送信供給に応じて、その指定時刻以降の状態変化情報を監視制御装置に送信する。これにより、必要な情報のみ効率良く送信することができる。
【００１３】
請求項３の発明に係る電力系統監視制御システムは、電力系統の主回路設備毎に分散配置され主回路および関連装置の状態変化を検出する回線単位制御装置と、前記回線単位制御装置からの状態変化情報をネットワークを介して入力し電力系統全体を監視制御する監視制御装置とを備えた電力系統監視制御システムにおいて、回線単位制御装置は、電力系統の設備の状態信号を入力し状態変化を検出する状態変化検出手段と、前記状態変化検出手段が検出した状態変化情報を記憶する記憶手段と、前記状態変化検出手段が検出した状態変化情報を前記ネットワークを介して前記監視制御装置に送信し前記監視制御装置からの受信通知を受信すると共に異常の発生で前記受信通知の受信がなくその後に前記監視制御装置から異常復帰通知を受信したときは前記監視制御装置に対し異常状態中に起きた状態変化情報を送信する送信手段とを備えたことを特徴とする。
【００１４】
請求項３の発明に係る電力系統監視制御システムにおいては、回線単位制御装置の状態変化検出手段が検出した状態変化情報は記憶手段に記憶されると共に、送信手段により、ネットワークを介して監視制御装置に送信される。送信手段は、監視制御装置からの受信通知を受信する。そして、伝送系異常の発生で受信通知の受信がなくその後に監視制御装置から異常復帰通知を受信したときは、監視制御装置に対し異常状態中に起きた状態変化情報を送信する。これにより、伝送系の異常中に起きた状態変化情報を喪失させることなく監視制御装置に伝送できる。
【００１５】
請求項４の発明に係る電力系統監視制御システムは、請求項３の発明において、前記回線単位制御装置の送信手段は、前記監視制御装置からの受信通知を受信したときは前記記憶手段に送信完了フラグを記憶し、前記監視制御装置から異常復帰通知を受信したときは前記記憶手段の送信完了フラグをチェックし送信未完了の状態変化情報を前記監視制御装置に送信することを特徴とする。
【００１６】
請求項４の発明に係る電力系統監視制御システムにおいては、請求項３の発明の作用に加え、回線単位制御装置の送信手段は、監視制御装置からの受信通知を受信したときは記憶手段に送信完了フラグを記憶する。これにより、監視制御装置に状態変化情報が伝送されたことを記憶する。そして、監視制御装置からの受信通知がなく異常復帰通知を受信したときは、記憶手段の送信完了フラグをチェックし送信未完了の状態変化情報を監視制御装置に送信する。これにより、送信未完了の状態変化情報を確実に監視制御装置に送信できる。
【００１７】
請求項５の発明に係る電力系統監視制御システムは、請求項１乃至請求項４のいずれか１項の発明において、前記回線単位制御装置と前記監視制御装置との間に、二重化された常用系および待機系の伝送中継装置が設けられ、前記回線単位制御装置は、前記伝送中継装置の運転モードの切り替えの際に、その運転モード切り替え中に発生した状態変化情報をモード切り替え終了時に前記監視制御装置に対して送信することを特徴とする。
【００１８】
請求項５の発明に係る電力系統監視制御システムにおいては、請求項１乃至請求項４のいずれか１項の発明の作用に加え、二重化された伝送中継装置の運転モードの切り替えの際には、その運転モード切り替え中に発生した状態変化情報をモード切り替え終了時に監視制御装置に対して送信する。これにより、二重化された伝送中継装置の運転モードの切り替えの際に起きた状態変化情報を喪失させることなく監視制御装置に伝送できる。
【００１９】
請求項６の発明に係るプログラムは、コンピュータを、電力系統の設備の状態信号を入力し状態変化を検出する手段と、検出した状態変化情報を記憶する手段と、検出した状態変化情報をネットワークを介して電力系統を監視制御する監視制御装置に送信する手段と、異常の発生で状態変化情報の送信が失敗しその後にその異常が復帰したときは異常復帰通知を前記監視制御装置に送信する手段と、監視制御装置から異常状態中に起きた状態変化情報の送信要求を受信したときは異常中に起きた状態変化情報を監視制御装置に送信する手段として機能させることを特徴とする。
【００２０】
請求項６の発明に係わるプログラムをコンピュータに入力し、コンピュータを作動させる。これにより、電力系統の設備の状態信号を入力し状態変化を検出し、検出した状態変化情報を記憶すると共に、検出した状態変化情報をネットワークを介して電力系統を監視制御する監視制御装置に送信する。そして、異常の発生で状態変化情報の送信が失敗しその後にその異常が復帰したときは異常復帰通知を監視制御装置に送信し、監視制御装置から異常状態中に起きた状態変化情報の送信要求を受信したときは異常中に起きた状態変化情報を監視制御装置に送信する。
【００２１】
請求項７の発明に係るプログラムは、コンピュータを、電力系統の設備の状態信号を入力し状態変化を検出する手段と、検出した状態変化情報を記憶する手段と、検出した状態変化情報をネットワークを介して電力系統を監視制御する監視制御装置に送信し前記監視制御装置からの受信通知を受信する手段と、異常の発生で前記受信通知の受信がなくその後に前記監視制御装置から異常復帰通知を受信したときは前記監視制御装置に対し異常状態中に起きた状態変化情報を送信する手段として機能させることを特徴とする。
【００２２】
請求項７の発明に係わるプログラムをコンピュータに入力し、コンピュータを作動させる。これにより、電力系統の設備の状態信号を入力し状態変化を検出し、検出した状態変化情報を記憶すると共に、検出した状態変化情報をネットワークを介して電力系統を監視制御する監視制御装置に送信し監視制御装置からの受信通知を受信する。そして、異常の発生で受信通知の受信がなくその後に前記監視制御装置から異常復帰通知を受信したときは監視制御装置に対し異常状態中に起きた状態変化情報を送信する。
【００２３】
【発明の実施の形態】
以下、本発明の実施の形態を説明する。図１は本発明の第１の実施の形態に係る電力系統監視制御システムのブロック構成図である。図１に示すように、電力系統監視制御システムは、電力系統全体を監視制御する複数台の監視制御装置１１ａ〜１１ｎと、電力系統の設備単位に主回路および関連装置からの入力信号の状態変化を検出する複数台の回線単位制御装置１２ａ〜１２ｍとをネットワーク１３で結合して構成されている。そして、ネットワーク１３はＬＡＮで構成されている。
【００２４】
回線単位制御装置１２ａ〜１２ｍは、電力系統の主回路設備毎に分散配置される。回線単位制御装置１２ａ〜１２ｍの状態変化検出手段１４ａ〜１４ｍは、設備の主回路や関連装置の状態信号を入力し状態変化を検出する。状態変化検出手段１４ａ〜１４ｍで検出された状態変化情報は記憶手段１５ａ〜１５ｍに記憶されると共に、送信手段１６ａ〜１６ｍにより、ネットワーク１３を介して監視制御装置１２ａ〜１２ｍに送信される。
【００２５】
伝送系の異常発生で状態変化情報の送信が失敗したときは、送信の失敗した送信手段１６ｊは、その異常の復帰を待ち、その異常が復帰したときは異常復帰通知をネットワーク１３を介して状態変化情報の送信失敗した監視制御装置１１ｉに送信する。異常復帰通知を受信した監視制御装置１１ｉは異常状態中に起きた状態変化情報の送信要求を送信失敗した回線単位制御装置１２ｊに送信する。送信失敗した送信手段１６ｊは、送信要求を受信したときは異常中に起きた状態変化情報を監視制御装置１１ｉに送信する。
【００２６】
図２は、図１の×印の箇所の伝送系異常が発生し、その異常復帰後にその異常中に起きた状態変化情報を回線単位制御装置１２ａから監視制御装置１１ｎに送信する場合の伝送シーケンスを示したシーケンス図である。図２では、監視制御装置１１ｎから回線単位制御装置１２ａに対して送信要求して状態変化情報を回線単位制御装置１２ａから監視制御装置１１ｎに送信する場合を示している。
【００２７】
図２に示すように、時刻ｔ１に発生した状態変化Ｐ１は回線単位制御装置１２ａから監視制御装置１１ａ〜１１ｎに送信される。その後、図１に示す×印の箇所で伝送系異常が発生し、伝送異常が復帰するまでの間の時刻ｔ２で状態変化Ｐ２が発生したとすると、回線単位制御装置１２ａはその状態変化Ｐ２を記憶手段１５ａに保存するとともに、ネットワーク１３に送信する。しかし、監視制御装置１１ｎは伝送異常のためその状態変化情報は伝送されない。
【００２８】
そこで、伝送異常が復帰するのを待ち、伝送異常が復帰した時には回線単位制御装置１２ａから送信失敗した監視制御装置１１ｎに対して、異常が復帰した異常復帰通知を行う。それに対して監視制御装置１１ｎは、回線単位制御装置１２ａに対して送信失敗した状態変化情報の送信を要求する。その状態変化情報の送信要求を受け取った回線単位制御装置１２ａは時刻ｔ１以降の保存状態変化データである状態変化Ｐ２を送信元である監視制御装置１１ｎに返信する。
【００２９】
このように、伝送系異常状態中に発生した状態変化情報を異常復帰後に回線単位制御装置１２ａから送信失敗した監視制御装置１１ｎへ送信するので、システム全体の伝送負荷と回線単位制御装置１２ａの処理負荷を大きく上げること無く、システムとして状態変化情報の取得機能を向上させることが可能となる。
【００３０】
図３は、システムの伝送系異常が発生した場合の他の伝送シーケンスを示したシーケンス図である。図２に示したものに対し回線単位制御装置１２ａは送信テーブル１７を有し、送信した状態変化Ｐを監視制御装置１１ａ〜１１ｎが受信したか否かを判断できるようにし、監視制御装置１１ａ〜１１ｎからの送信要求がなくても状態変化情報を回線単位制御装置１２ａから監視制御装置１１ａ〜１１ｎに送信できるようにしている。
【００３１】
送信テーブル１７は送信した状態変化Ｐ毎に有し、監視制御装置１１ａ〜１１ｎからの状態変化情報の受信通知により送信フラグを記憶するようにしている。いま、図１の×印の箇所の伝送系異常が発生し、その異常復帰後に、その異常中に起きた状態変化情報を回線単位制御装置１２ａから監視制御装置１１ｎに対して送信する場合について説明する。図３において、図１の×印の箇所で伝送系異常が発生している間に、回線単位制御装置１２ａが状態変化Ｐ１を検出したとする。回線単位制御装置１２ａが検出した状態変化Ｐ１はネットワークを介して各々の監視制御装置１１ａ〜１１ｎに送信される。監視制御装置１１ａは正常に状態変化Ｐ１を受信するので、送信元の回線単位制御装置１２ａに対して受信通知を送信する。これにより送信元の回線単位制御装置１２ａは、状態変化Ｐ１送信フラグを送信完了とする。
【００３２】
一方、監視制御装置１１ｎは状態変化Ｐ１を受信できないので送信失敗となる。この場合、監視制御装置１１ｎから受信通知が送信されて来ないので、回線単位制御装置１２ａは、状態変化Ｐ１送信フラグを送信完了とできない。つまり、監視制御装置１１ｎに対しては未送信のままの状態となる。このように、回線単位制御装置１２ａは、送信テーブル１７により、どの監視制御装置１１ａ〜１１ｎにどの状態変化情報を送っているのか否かを把握している。
【００３３】
そして、伝送系異常が復帰し、異常復帰通知が監視制御装置１１ｎから回線単位制御装置１２ａに対して送信されると、これを受けた回線単位制御装置１２ａは、まだ送信完了していない監視制御装置１１ｎに対して状態変化Ｐ１を送信する。監視制御装置１１ｎからその受信通知を受けると、状態変化Ｐ１のデータ送信フラグを送信完了とすることにより、全ての監視制御装置１１ａ〜１１ｎに対して送信済みとの認識を持つことができる。
【００３４】
このように、回線単位制御装置１２に送信テーブルを設けることにより、回線単位制御装置１２と監視制御装置１１との間で発生した伝送系異常の復帰時に回線単位制御装置１２から送信失敗した監視制御装置１１に対し、監視制御装置１１からの送信要求なしに、異常状態中に発生した状態変化情報を送信することができる。
【００３５】
以上述べたように、第１の実施の形態によれば、回線単位制御装置１２と監視制御装置１１との間で発生した伝送系異常の復帰時に、回線単位制御装置１２から監視制御装置１１に状態変化情報を送信できる。すなわち、システム全体の伝送負荷と監視制御装置の処理負荷を大きく上げること無く、システム中の全監視制御装置にて漏れなく状態変化情報を自動的に送信することができ、システムとして情報取得機能を向上させることが可能となる。
【００３６】
次に、本発明の第２の実施の形態を説明する。図４は本発明の第２の実施の形態に係る電力系統監視制御システムのブロック構成図である。この第２の実施の形態は、図１に示した第１の実施の形態に対し、回線単位制御装置１２と監視制御装置１１との間に、二重化された常用系および待機系の伝送中継装置１８Ａ、１８Ｂを追加して設けたものである。
【００３７】
図４において、電力系統全体を監視制御する複数台の監視制御装置１１ａ〜１１ｎと電力系統の設備単位に入力信号の状態変化を検出する回線単位制御装置１２ａ〜１２ｍとの間に、伝達される情報を中継する伝送中継装置１８Ａ、１８Ｂが設けられている。これらはＬＡＮを介してネットワーク１３Ａ、１３Ｂを形成している。伝送中継装置１８Ａ、１８Ｂは常用モードと待機モードとが一対となっており、それらは電線１９による接点信号にてモードの情報をやり取りする。また、図４中において、×印の箇所で伝送系異常が発生し、伝送中継装置１８Ａが常用モードであるとして以下説明する。
【００３８】
図５は、図４の×印の箇所で伝送系異常が発生し、その異常復帰後にその異常中に起きた状態変化Ｐ２を回線単位制御装置１２ａから送信失敗した監視制御装置１１ａに送信する場合の伝送シーケンスを示したシーケンス図である。図５では、監視制御装置１１ａから回線単位制御装置１２ａに対して送信要求して状態変化情報を回線単位制御装置１２ａから監視制御装置１１ａに送信する場合を示している。
【００３９】
図５に示すように、時刻ｔ１に発生した状態変化Ｐ１は回線単位制御装置１２ａから伝送中継装置１８Ａを介して監視制御装置１１ａ〜１１ｎに送信される。その後、図４に示すように監視制御装置１１ａの伝送系に異常が発生し、その伝送系異常が復帰するまでの間に状態変化Ｐ２が発生したとする。
【００４０】
回線単位制御装置１２ａはその状態変化Ｐ２を記憶手段１５ａに保存すると共に伝送中継装置１８Ａを介して監視制御装置１１ａ〜１１ｎに送信する。監視制御装置１１ａには、伝送系異常のため状態変化情報が伝送されない。そこで、伝送系異常の復帰時には回線単位制御装置１２ａから監視制御装置１１ａに対して、異常が復帰した異常復帰通知を行う。それに対して、監視制御装置１１ａは伝送異常中の状態変化情報を回線単位制御装置１２ａに対して要求する。例えば、監視制御装置１１ａが持っている最後の状態変化情報に付加されている時刻ｔ１以降の状態変化情報を回線単位制御装置１２ａに対して要求し、それを受け取った回線単位制御装置１２ａは時刻ｔ１以降の保存状態変化データである状態変化Ｐ２を送信元である監視制御装置１１ａに返信する。
【００４１】
次に、図６は、システムの伝送系異常が発生した場合の他の伝送シーケンスを示したシーケンス図である。図５に示したものに対し回線単位制御装置１２ａは送信テーブル１７を有し、送信した状態変化Ｐを監視制御装置１１ａ〜１１ｎが受信したか否かを判断できるようにし、監視制御装置１１ａ〜１１ｎからの送信要求がなくても状態変化情報を回線単位制御装置１２ａから監視制御装置１１ａ〜１１ｎに送信できるようにしている。なお、図６では監視制御装置１１ｎの伝送系異常が発生した場合を示している。
【００４２】
図６に示すように、監視制御装置１１ｎの伝送系に異常が発生している間に、状態変化Ｐ１を回線単位制御装置１２ａが検出したとすると、回線単位制御装置１２ａは、その状態変化Ｐ１をまず伝送中継装置１８Ａを介して監視制御装置１１１ａ〜１１ｎに送信する。状態変化Ｐ１を正常に受信した監視制御装置１１ａは送信元の回線単位制御装置１２ａ宛てに受信通知を送信する。
【００４３】
一方、伝送系異常の監視制御装置１１ｎは状態変化Ｐ１を受信することはできないので送信失敗となる。回線単位制御装置１２ａは送信テーブル１７を有しており、状態変化Ｐ１送信フラグにより、どの監視制御装置１１ａ〜１１ｎにどの状態変化情報を送っていないのかを把握している。
【００４４】
その後、監視制御装置１１ｎの伝送系異常が復帰し、異常復帰通知が監視制御装置１１ｎから回線単位制御装置１２ａに対して送信されると、これを受けた回線単位制御装置１２ａはまだ送信していない監視制御装置１１ｎに対して状態変化Ｐ１を送信する。そして、その受信通知を監視制御装置１１ｎから受けることにより、状態変化Ｐ１のデータ送信フラグを送信完了とする。これにより、全ての監視制御装置１１ａ〜１１ｎに対して送信済みとの認識を持つことができる。
【００４５】
次に、図７は待機モードと常用モードとで二重化された伝送中継装置１８Ａ、１８Ｂがモードを切り替る間に発生した状態変化情報を回線単位制御装置１２ａから監視制御装置１１ａ〜１１ｎに対して送信する伝送シーケンスを示したシーケンス図である。
【００４６】
図７において、いま、伝送中継装置１８Ａが待機モードで、伝送中継装置１８Ｂが常用モードである状態で、運転モードの切り替えが行われる場合について説明する。運転モード切り替え中に状態変化Ｐ１が起こったとすると、回線単位制御装置１２ａは、常用モードの伝送中継装置１８Ｂに状態変化Ｐ１を送信する。これは運転モードの切り替えが完了していないので、回線単位制御装置１２ａは伝送中継装置１８Ｂを常用モードと認識しているからである。
【００４７】
運転モードの切り替え中は、今まで常用モードであった伝送中継装置１８Ｂも待機モードとなるため、運転モードを切り替えている途中の伝送中継装置１８Ａ、１８Ｂ共に待機モードになり、伝送中継装置１８Ｂからは監視制御装置１１ａ〜１１ｎに状態変化情報を送信できない。
【００４８】
その後、運転モードの切り替えが終了し、常用モードと待機モードとが切り替わると、２つの伝送中継装置１８Ａ、１８Ｂがモードの切り替え通知を監視制御装置１１ａ〜１１ｎに対して送信する。その送信情報を起点に監視制御装置１１ａ〜１１ｎから回線単位制御装置１２ａに対してデータの送信要求を行い、回線単位制御装置１２ａがそれに応答して未送信の状態変化Ｐ１を要求送信元の監視制御装置１１ａ〜１１ｎに送る。
【００４９】
従って、伝送中継装置の運転モード中に送信が中断した状態変化情報についても漏れなく監視制御装置１１ａ〜１１ｎに送信でき、システムとして情報取得機能を向上させることが可能となる。
【００５０】
以上の説明では、伝送系異常中に１つの状態変化が起きた場合について説明したが、複数の状態変化が起きた場合には伝送異常復帰後の監視制御装置１１からの送信要求に対してそれらの状態変化情報を纏めて送信する。また、送信失敗した監視制御装置１１が保有している最後に受信した状態変化データに付加されている時刻以降のデータを要求するようしたが、監視制御装置１１が保有している不良発生データに付加されている時刻を元に回線単位制御装置１２ａに対してデータを要求するようにすることも可能である。
【００５１】
また、伝送異常復帰後に状態変化情報を取得するようにしたが、監視制御装置１１から周期的に状態変化情報の送信を回線単位制御装置１２に要求したり、伝送異常復帰後、回線単位制御措置１２が保有している全情報を監視制御装置１１が要求し、取得した全情報と既に保有してる情報とを比較後、既存のものには上書きすることも可能である。
【００５２】
そして、監視制御装置１１と回線単位制御装置１２との間で状態変化情報の伝送確認を行っているが、監視制御装置１１と伝送中継装置１８との間、伝送中継装置１８と回線単位制御装置１２との間で分担して行うことも可能である。
【００５３】
なお、上述した各実施の形態において記載した手法は、コンピュータに実行させることのできるプログラムとして、記憶媒体に記憶し各装置に応用したり、通信媒体により伝送して各種装置に適用することも可能である。
【００５４】
本発明における記憶媒体としては、磁気ディスク、フレキシブルディスク、光ディスク（ＣＤ−ＲＯＭ、ＣＤ−Ｒ、ＤＶＤなど）、光磁気ディスク（ＭＯなど）、半導体メモリなど、プログラムを記憶でき、かつコンピュータが読み取り可能な記憶媒体であれば、その記憶形式はいずれの形態であっても良い。また、ここで記憶媒体とは、コンピュータと独立した媒体に限らず、ＬＡＮやインターネットなどにより伝送されたプログラムをダウンロードして記憶または一時記憶した記憶媒体も含まれる。
【００５５】
【発明の効果】
以上述べたように、本発明によれば、伝送系の異常状態中に発生した状態変化情報を異常復帰後に回線単位制御装置から監視制御装置へ送信できるので、システム全体の伝送負荷と回線単位制御装置の処理負荷を大きく上げること無く、システムとして情報取得機能を向上させることが可能となる。
【００５６】
また、回線単位制御装置内に保存されている状態変化情報に発生時の時刻を付加した場合には、監視制御装置より時刻を指定して送信要求を行うことが可能であるので、その場合には、必要な情報のみ効率良く送信することが可能となる。
【図面の簡単な説明】
【図１】本発明の第１の実施の形態に係る電力系統監視制御システムのブロック構成図。
【図２】本発明の第１の実施の形態に係る電力系統監視制御システムで伝送系異常が発生した場合の伝送シーケンスを示したシーケンス図。
【図３】本発明の第１の実施の形態に係る電力系統監視制御システムで伝送系異常が発生した場合の他の伝送シーケンスを示したシーケンス図。
【図４】本発明の第２の実施の形態に係る電力系統監視制御システムのブロック構成図。
【図５】本発明の第２の実施の形態に係る電力系統監視制御システムで伝送系異常が発生した場合の伝送シーケンスを示したシーケンス図。
【図６】本発明の第２の実施の形態に係る電力系統監視制御システムで伝送系異常が発生した場合の他の伝送シーケンスを示したシーケンス図。
【図７】本発明の第２の実施の形態に係る電力系統監視制御システムで待機モードと常用モードとで二重化された伝送中継装置が運転モードを切り替る間に発生した状態変化情報を送信する伝送シーケンスを示したシーケンス図。
【符号の説明】
１１…監視制御装置、１２…回線単位制御装置、１３…ネットワーク、１４…状態変化検出手段、１５…記憶手段、１６…送信手段、１７…送信テーブル、１８…伝送中継装置、１９…電線[0001]
BACKGROUND OF THE INVENTION
The present invention distributes and arranges line unit control devices for each main circuit facility of a power system, detects a state change of the main circuit facility, transmits the state change information to the monitoring control device via a network, and transmits the entire power system. The present invention relates to a power system monitoring and control system and a program which are to be monitored and controlled.
[0002]
[Prior art]
In general, monitoring control of various facilities constituting a power system is performed by transmitting a state change signal from a line unit control device provided in a main circuit facility of the power system to a higher-level monitoring control device via a network. This is done by monitoring and controlling.
[0003]
In such a power system monitoring and control system, the line unit control device has a monitoring control function for each line of the power system, and is a distributed system in which the entire power system is monitored and controlled by the monitoring control device.
[0004]
In other words, along with the expansion of the application of the power system monitoring control system, some functions of the monitoring control device are distributed to the line unit control devices, and some functions of the control system in the host control station are further distributed to the monitoring control device. ing. For this reason, the construction of a power system monitoring and control system having an optimal function sharing has been required.
[0005]
With the progress of digital technology in recent years, higher performance and lower cost of processors, miniaturization and cost reduction of memory have progressed, and the above distributed processing becomes possible, and power system monitoring that enables optimal function sharing A control system can be constructed. As a result, the complexity of software and the increase in size of the device due to the concentration of functions in the monitoring control device or the host control device are suppressed, and further, the increase in cost is suppressed.
[0006]
As part of this sharing of functions, the status change detection is conventionally performed by the line unit control device or the monitoring control device, and the state change information is stored by the monitoring control device. Now you can do it.
[0007]
[Problems to be solved by the invention]
However, as the state change information is stored in the line unit control device, establishment of a highly reliable transmission method that can reliably transmit the state change information stored in the line unit control device to the host supervisory control device. Has come to be required. In other words, it is required to establish a transmission method that can reliably transmit the state change information stored in the line unit control device to the host supervisory control device even if a transmission system device abnormality or a transmission abnormality occurs.
[0008]
An object of the present invention is to provide a power system monitoring and control system and a program that can transmit without losing state change information that has occurred during an abnormality of a transmission system device or a network abnormality between a line unit control device and a monitoring control device. That is.
[0009]
[Means for Solving the Problems]
The power system monitoring and control system according to the invention of claim 1 includes a line unit control device that is distributed and arranged for each main circuit facility of the power system and detects a state change of the main circuit and related devices, and a state from the line unit control device. In a power system monitoring and control system that includes a monitoring control device that inputs change information via a network and monitors and controls the entire power system, the line unit control device inputs a status signal of the equipment of the power system and detects a state change State change detecting means, storage means for storing state change information detected by the state change detecting means, and state change information detected by the state change detecting means are transmitted to the monitoring control device via the network. When the transmission of the state change information fails due to the occurrence of an abnormality, and then the abnormality is recovered, an abnormality return notification is transmitted to the monitoring control device and the monitoring is performed. When receiving a transmission request for the state change information that occurred from your device in the abnormal state we are characterized by comprising a transmitting means for transmitting the status change information that occurred during abnormality in the monitoring control unit.
[0010]
In the power system monitoring and control system according to the first aspect of the invention, the state change information detected by the state change detecting means of the line unit control device is stored in the storage means and monitored and controlled via the network by the transmitting means. Sent to the device. The transmission means transmits an abnormality return notification to the monitoring control apparatus when the transmission of the state change information fails due to the occurrence of an abnormality in the transmission system and the abnormality is recovered thereafter. When a transmission request for state change information that has occurred during an abnormal state is received from the monitoring control device, the state change information that has occurred during the abnormality is transmitted to the monitoring control device. Thereby, it is possible to transmit the state change information that has occurred during the abnormality of the transmission system to the monitoring control device without losing it.
[0011]
According to a second aspect of the present invention, in the power system monitoring and control system according to the first aspect of the present invention, when the monitoring and control apparatus receives the abnormal return notification, the monitoring and control apparatus specifies a time for the line unit control apparatus. A transmission request for state change information stored in the storage means in the line unit control apparatus after the time is sent.
[0012]
In the power system supervisory control system according to the invention of claim 2, in addition to the operation of the invention of claim 1, the supervisory control device, when receiving an abnormal return notification from the line unit control device, The time is specified, and a transmission request for the state change information stored in the storage means in the line unit control apparatus after the specified time is sent. In response to the transmission supply, the line unit control device transmits the state change information after the designated time to the monitoring control device. Thereby, only necessary information can be efficiently transmitted.
[0013]
A power system monitoring and control system according to a third aspect of the invention includes a line unit control device that is distributed and arranged for each main circuit facility of the power system and detects a state change of the main circuit and related devices, and a state from the line unit control device In a power system monitoring and control system that includes a monitoring control device that inputs change information via a network and monitors and controls the entire power system, the line unit control device inputs a status signal of the equipment of the power system and detects a state change State change detection means, storage means for storing state change information detected by the state change detection means, and state change information detected by the state change detection means are transmitted to the monitoring control device via the network, and Receives a reception notification from the monitoring and control device, and does not receive the reception notification when an abnormality occurs, and then receives an abnormality return notification from the monitoring and control device. When the is characterized in that a transmission means for transmitting the status change information that occurred during the abnormal state to the monitor control apparatus.
[0014]
In the power system monitoring and control system according to the invention of claim 3, the state change information detected by the state change detection means of the line unit control device is stored in the storage means, and is also transmitted by the transmission means via the network. Sent to. The transmission means receives a reception notification from the monitoring control device. Then, when the reception notification is not received due to the occurrence of the transmission system abnormality, and the abnormality return notification is subsequently received from the monitoring control device, the state change information that occurred during the abnormal state is transmitted to the monitoring control device. Thereby, it is possible to transmit the state change information that has occurred during the abnormality of the transmission system to the monitoring control device without losing it.
[0015]
According to a fourth aspect of the present invention, in the power system monitoring control system according to the third aspect of the present invention, when the transmission unit of the line unit control device receives the reception notification from the monitoring control device, the transmission is completed to the storage unit. A flag is stored, and when an abnormal return notification is received from the monitoring control device, a transmission completion flag of the storage means is checked, and incomplete transmission state change information is transmitted to the monitoring control device.
[0016]
In the power system monitoring control system according to the invention of claim 4, in addition to the operation of the invention of claim 3, the transmission means of the line unit control apparatus transmits to the storage means when receiving the reception notification from the monitoring control apparatus. The completion flag is stored. As a result, the fact that the state change information has been transmitted to the monitoring control device is stored. When there is no reception notification from the monitoring control device and an abnormal return notification is received, the transmission completion flag of the storage means is checked and the incomplete transmission state change information is transmitted to the monitoring control device. Thereby, the state change information that has not been transmitted can be reliably transmitted to the monitoring control device.
[0017]
A power system supervisory control system according to a fifth aspect of the present invention is the utility system according to any one of the first to fourth aspects, wherein a duplex system is provided between the line unit control device and the supervisory control device. And a standby transmission relay device, the line unit control device, when switching the operation mode of the transmission relay device, the state change information generated during the switching of the operation mode, the monitoring control at the end of the mode switching It transmits to an apparatus, It is characterized by the above-mentioned.
[0018]
In the power system monitoring and control system according to the invention of claim 5, in addition to the operation of the invention of any one of claims 1 to 4, when switching the operation mode of the duplex transmission relay device, The state change information generated during the operation mode switching is transmitted to the monitoring control device at the end of the mode switching. Thereby, it can transmit to the monitoring control apparatus, without losing the state change information which occurred at the time of the switching of the operation mode of the duplexed transmission relay apparatus.
[0019]
According to a sixth aspect of the present invention, there is provided a program for inputting a state signal of a power system facility to detect a state change, a means for storing the detected state change information, and a network for storing the detected state change information. Means for transmitting to the monitoring control device for monitoring and controlling the power system, and means for transmitting an abnormality return notification to the monitoring control device when the transmission of the state change information fails due to the occurrence of an abnormality and then the abnormality is recovered When a request for transmission of state change information that has occurred during an abnormal state is received from the monitoring control device, it functions as means for transmitting state change information that has occurred during the abnormality to the monitoring control device.
[0020]
A program according to the invention of claim 6 is input to a computer to operate the computer. As a result, the state signal of the facility of the power system is input, the state change is detected, the detected state change information is stored, and the detected state change information is transmitted to the monitoring control device that monitors and controls the power system via the network. To do. Then, when the transmission of the state change information fails due to the occurrence of an abnormality and then the abnormality is recovered, an abnormality return notification is transmitted to the monitoring control device, and the monitoring control device sends a request for transmitting the state change information during the abnormal state. Is received, the state change information that occurred during the abnormality is transmitted to the monitoring control device.
[0021]
According to a seventh aspect of the present invention, there is provided a program for inputting a state signal of a power system facility to detect a state change, a means for storing the detected state change information, and a network for storing the detected state change information. Means for receiving and receiving a reception notification from the monitoring control device via a monitoring control device that monitors and controls the power system, and receiving an abnormality return notification from the monitoring control device after the reception notification is not received due to the occurrence of an abnormality. When received, the monitoring control device is made to function as a means for transmitting state change information that occurred during an abnormal state.
[0022]
A program according to the invention of claim 7 is input to a computer to operate the computer. As a result, the state signal of the facility of the power system is input, the state change is detected, the detected state change information is stored, and the detected state change information is transmitted to the monitoring control device that monitors and controls the power system via the network. The reception notification from the monitoring control device is received. Then, when there is no reception notification due to the occurrence of an abnormality and an abnormality return notification is received from the monitoring and control apparatus, state change information that occurred during the abnormal state is transmitted to the monitoring and control apparatus.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below. FIG. 1 is a block configuration diagram of a power system monitoring control system according to a first embodiment of the present invention. As shown in FIG. 1, the power system monitoring control system includes a plurality of monitoring control devices 11a to 11n that monitor and control the entire power system, and state changes of input signals from the main circuit and related devices in units of the power system. A plurality of line unit control devices 12 a to 12 m for detecting the network are connected by a network 13. The network 13 is composed of a LAN.
[0024]
The line unit control devices 12a to 12m are distributedly arranged for each main circuit facility of the power system. The state change detecting means 14a-14m of the line unit control devices 12a-12m receive state signals of the main circuit of the equipment and related devices and detect the state change. The state change information detected by the state change detection units 14a to 14m is stored in the storage units 15a to 15m, and transmitted to the monitoring control devices 12a to 12m via the network 13 by the transmission units 16a to 16m.
[0025]
When the transmission of the state change information fails due to the occurrence of an abnormality in the transmission system, the transmission means 16j that failed to transmit waits for the abnormality to return, and when the abnormality is recovered, the abnormality return notification is sent via the network 13. The change information is transmitted to the monitoring control apparatus 11i that has failed to transmit. The supervisory control device 11i that has received the abnormal return notification transmits a transmission request for state change information that occurred during the abnormal state to the line unit control device 12j that has failed to transmit. The transmission unit 16j that has failed to transmit transmits state change information that has occurred during the abnormality to the monitoring control device 11i when receiving a transmission request.
[0026]
FIG. 2 shows a transmission sequence in the case where a transmission system abnormality occurs at the location marked with X in FIG. 1, and the state change information generated during the abnormality is transmitted from the line unit control device 12a to the monitoring control device 11n after the abnormality is recovered. FIG. FIG. 2 shows a case where the supervisory control device 11n sends a transmission request to the line unit control device 12a to transmit the state change information from the line unit control device 12a to the supervisory control device 11n.
[0027]
As shown in FIG. 2, the state change P1 generated at time t1 is transmitted from the line unit control device 12a to the monitoring control devices 11a to 11n. Thereafter, assuming that a transmission system abnormality occurs at a location indicated by an X in FIG. 1 and a state change P2 occurs at time t2 until the transmission abnormality is recovered, the line unit control device 12a determines the state change P2 as follows. The data is stored in the storage unit 15 a and transmitted to the network 13. However, the state change information is not transmitted to the supervisory control device 11n due to transmission abnormality.
[0028]
Therefore, waiting for the transmission abnormality to recover, and when the transmission abnormality recovers, the line unit control device 12a notifies the monitoring control device 11n that failed to transmit the abnormality recovery notification that the abnormality has been recovered. On the other hand, the monitoring control device 11n requests the line unit control device 12a to transmit the state change information that has failed to be transmitted. The line unit control device 12a that has received the transmission request for the status change information returns a status change P2 that is the saved status change data after time t1 to the monitoring control device 11n that is the transmission source.
[0029]
As described above, since the state change information generated in the abnormal state of the transmission system is transmitted from the line unit control device 12a to the monitoring control device 11n that has failed to be transmitted after the abnormality is restored, the transmission load of the entire system and the processing of the line unit control device 12a The state change information acquisition function can be improved as a system without greatly increasing the load.
[0030]
FIG. 3 is a sequence diagram showing another transmission sequence when a transmission system abnormality occurs in the system. 2, the line unit control device 12a has a transmission table 17, which enables the monitoring control devices 11a to 11n to determine whether or not the transmitted state change P has been received. Even if there is no transmission request from 11n, the state change information can be transmitted from the line unit control device 12a to the monitoring control devices 11a to 11n.
[0031]
The transmission table 17 is provided for each state change P that is transmitted, and stores a transmission flag by receiving notification of state change information from the monitoring control devices 11a to 11n. Now, a description will be given of a case where a transmission system abnormality occurs at the location marked with x in FIG. 1, and after the abnormality is recovered, the state change information generated during the abnormality is transmitted from the line unit control device 12a to the monitoring control device 11n. To do. In FIG. 3, it is assumed that the line unit control device 12a detects the state change P1 while the transmission system abnormality is occurring at the location indicated by the cross in FIG. The state change P1 detected by the line unit control device 12a is transmitted to each of the monitoring control devices 11a to 11n via the network. Since the monitoring control apparatus 11a normally receives the state change P1, it transmits a reception notification to the transmission line unit control apparatus 12a. As a result, the transmission-source line unit control device 12a completes transmission of the state change P1 transmission flag.
[0032]
On the other hand, since the monitoring control device 11n cannot receive the state change P1, transmission fails. In this case, since the reception notification is not transmitted from the monitoring control device 11n, the line unit control device 12a cannot complete the transmission of the state change P1 transmission flag. In other words, the state remains untransmitted to the monitoring control device 11n. In this way, the line unit control device 12a knows which state change information is sent to which monitoring control devices 11a to 11n from the transmission table 17.
[0033]
Then, when the transmission system abnormality is recovered and an abnormality return notification is transmitted from the monitoring control apparatus 11n to the line unit control apparatus 12a, the line unit control apparatus 12a that has received this notification has not yet completed transmission. A state change P1 is transmitted to the device 11n. When the reception notification is received from the monitoring control device 11n, the transmission of the data transmission flag of the state change P1 is completed, so that it can be recognized that all the monitoring control devices 11a to 11n have been transmitted.
[0034]
In this way, by providing a transmission table in the line unit control device 12, the supervisory control that failed to transmit from the line unit control device 12 when the transmission system abnormality occurred between the line unit control device 12 and the monitor control device 11 is recovered. The state change information generated during the abnormal state can be transmitted to the device 11 without a transmission request from the monitoring control device 11.
[0035]
As described above, according to the first embodiment, when the transmission system abnormality that occurs between the line unit control device 12 and the monitor control device 11 is recovered, the line unit control device 12 changes to the monitor control device 11. State change information can be transmitted. In other words, state change information can be automatically transmitted without omission in all supervisory control devices in the system without greatly increasing the transmission load of the entire system and the processing load of the supervisory control device. It becomes possible to improve.
[0036]
Next, a second embodiment of the present invention will be described. FIG. 4 is a block diagram of a power system monitoring control system according to the second embodiment of the present invention. The second embodiment is different from the first embodiment shown in FIG. 1 in that a duplex transmission system and standby system transmission relay apparatus between the line unit control apparatus 12 and the monitoring control apparatus 11 are used. 18A and 18B are additionally provided.
[0037]
In FIG. 4, it is transmitted between a plurality of monitoring control devices 11a to 11n that monitor and control the entire power system and line unit control devices 12a to 12m that detect a change in the state of an input signal for each equipment unit of the power system. Transmission relay apparatuses 18A and 18B for relaying information are provided. These form networks 13A and 13B via a LAN. The transmission relay devices 18 </ b> A and 18 </ b> B have a pair of a normal mode and a standby mode, and they exchange mode information by a contact signal by the electric wire 19. Further, in FIG. 4, the following description will be given assuming that a transmission system abnormality occurs at a location marked with × and the transmission relay device 18A is in the normal mode.
[0038]
FIG. 5 shows a case in which a transmission system abnormality occurs at the location marked with X in FIG. 4 and the state change P2 occurring during the abnormality is transmitted from the line unit control device 12a to the monitoring control device 11a that has failed to transmit after the abnormality recovery. It is the sequence diagram which showed the transmission sequence of. FIG. 5 shows a case where the monitoring control device 11a sends a transmission request to the line unit control device 12a and the state change information is transmitted from the line unit control device 12a to the monitoring control device 11a.
[0039]
As shown in FIG. 5, the state change P1 generated at time t1 is transmitted from the line unit control device 12a to the monitoring control devices 11a to 11n via the transmission relay device 18A. Thereafter, as shown in FIG. 4, it is assumed that an abnormality occurs in the transmission system of the supervisory control device 11a, and a state change P2 occurs until the abnormality of the transmission system is recovered.
[0040]
The line unit control device 12a stores the state change P2 in the storage unit 15a and transmits it to the monitoring control devices 11a to 11n via the transmission relay device 18A. The state change information is not transmitted to the monitoring controller 11a due to a transmission system abnormality. Therefore, when the transmission system abnormality is recovered, the line unit control device 12a notifies the monitoring control device 11a that the abnormality has been recovered. On the other hand, the supervisory control device 11a requests the line unit control device 12a for state change information during abnormal transmission. For example, the line unit control device 12a requests the state change information after the time t1 added to the last state change information held by the supervisory control device 11a to the line unit control device 12a. A state change P2 that is stored state change data after t1 is returned to the monitoring control apparatus 11a that is the transmission source.
[0041]
Next, FIG. 6 is a sequence diagram showing another transmission sequence when a transmission system abnormality occurs in the system. In contrast to what is shown in FIG. 5, the line unit control device 12a has a transmission table 17, which allows the monitoring control devices 11a to 11n to determine whether or not the transmitted state change P has been received. Even if there is no transmission request from 11n, the state change information can be transmitted from the line unit control device 12a to the monitoring control devices 11a to 11n. FIG. 6 shows a case where a transmission system abnormality has occurred in the monitoring control device 11n.
[0042]
As shown in FIG. 6, if the line unit control device 12a detects the state change P1 while an abnormality occurs in the transmission system of the supervisory control device 11n, the line unit control device 12a detects the state change P1. Is first transmitted to the monitoring control devices 111a to 11n via the transmission relay device 18A. The monitoring control device 11a that has normally received the state change P1 transmits a reception notification to the transmission line unit control device 12a.
[0043]
On the other hand, since the monitoring control device 11n for transmission system abnormality cannot receive the state change P1, transmission fails. The line unit control device 12a has a transmission table 17, and grasps which state change information is not sent to which monitoring control devices 11a to 11n by the state change P1 transmission flag.
[0044]
Thereafter, when the transmission system abnormality of the supervisory control device 11n is recovered and an abnormality return notification is transmitted from the supervisory control device 11n to the line unit control device 12a, the line unit control device 12a that has received this notice has not yet transmitted. The state change P1 is transmitted to the monitoring control device 11n that is not present. Then, when the reception notification is received from the monitoring control device 11n, the transmission of the data transmission flag of the state change P1 is completed. Thereby, it can be recognized that transmission has been completed for all the monitoring control devices 11a to 11n.
[0045]
Next, FIG. 7 shows the state change information generated while the transmission relay apparatuses 18A and 18B duplexed in the standby mode and the normal mode are switched from the line unit control apparatus 12a to the monitoring control apparatuses 11a to 11n. It is the sequence diagram which showed the transmission sequence to transmit.
[0046]
In FIG. 7, the case where the operation mode is switched while the transmission relay device 18A is in the standby mode and the transmission relay device 18B is in the normal mode will be described. If the state change P1 occurs during the operation mode switching, the line unit control device 12a transmits the state change P1 to the transmission relay device 18B in the normal mode. This is because the line unit control device 12a recognizes the transmission relay device 18B as the normal mode because the switching of the operation mode is not completed.
[0047]
During the switching of the operation mode, the transmission relay device 18B that has been in the normal mode until now is also in the standby mode. Therefore, both the transmission relay devices 18A and 18B that are switching the operation mode are in the standby mode, and the transmission relay device 18B Cannot transmit the state change information to the monitoring control devices 11a to 11n.
[0048]
Thereafter, when the switching of the operation mode is completed and the normal mode and the standby mode are switched, the two transmission relay devices 18A and 18B transmit mode switching notifications to the monitoring control devices 11a to 11n. From the transmission information, the monitoring control devices 11a to 11n make a data transmission request to the line unit control device 12a, and the line unit control device 12a monitors the request transmission source for an untransmitted state change P1 in response thereto. It sends to the control devices 11a to 11n.
[0049]
Therefore, state change information whose transmission is interrupted during the operation mode of the transmission relay apparatus can be transmitted to the monitoring control apparatuses 11a to 11n without omission, and the information acquisition function can be improved as a system.
[0050]
In the above description, the case where one state change has occurred during the transmission system abnormality has been described. However, when a plurality of state changes have occurred, these are in response to a transmission request from the monitoring control apparatus 11 after the transmission abnormality is restored. The state change information is sent together. In addition, data after the time added to the last received state change data held by the supervisory control device 11 that failed to transmit is requested, but the failure occurrence data held by the supervisory control device 11 is requested. It is also possible to request data from the line unit control device 12a based on the added time.
[0051]
In addition, the state change information is acquired after the transmission abnormality is recovered. However, the monitoring control apparatus 11 periodically requests the line unit control apparatus 12 to transmit the state change information, or after the transmission abnormality is recovered, the line unit control measure is taken. It is also possible for the supervisory control device 11 to request all the information held by 12, and after overwriting all the acquired information with the information already held, the existing information can be overwritten.
[0052]
The state change information transmission is confirmed between the supervisory control device 11 and the line unit control device 12, but between the supervisory control device 11 and the transmission relay device 18, the transmission relay device 18 and the line unit control device. It is also possible to share with 12.
[0053]
The method described in each of the above embodiments can be stored in a storage medium as a program that can be executed by a computer and applied to each device, or transmitted through a communication medium and applied to various devices. It is.
[0054]
As a storage medium in the present invention, a magnetic disk, a flexible disk, an optical disk (CD-ROM, CD-R, DVD, etc.), a magneto-optical disk (MO, etc.), a semiconductor memory, etc. can be stored and can be read by a computer. As long as it is a simple storage medium, the storage format may be any form. Here, the storage medium is not limited to a medium independent of the computer, but also includes a storage medium in which a program transmitted via a LAN or the Internet is downloaded and stored or temporarily stored.
[0055]
【The invention's effect】
As described above, according to the present invention, since the state change information generated during the abnormal state of the transmission system can be transmitted from the line unit control unit to the monitoring control unit after returning from the abnormal state, the transmission load and the line unit control of the entire system can be transmitted. The information acquisition function can be improved as a system without greatly increasing the processing load of the apparatus.
[0056]
In addition, when the time of occurrence is added to the state change information stored in the line unit control device, it is possible to specify the time from the monitoring control device and make a transmission request. Can efficiently transmit only necessary information.
[Brief description of the drawings]
FIG. 1 is a block configuration diagram of a power system monitoring control system according to a first embodiment of the present invention.
FIG. 2 is a sequence diagram showing a transmission sequence when a transmission system abnormality occurs in the power system monitoring control system according to the first embodiment of the present invention.
FIG. 3 is a sequence diagram showing another transmission sequence when a transmission system abnormality occurs in the power system monitoring control system according to the first embodiment of the present invention.
FIG. 4 is a block configuration diagram of a power system monitoring control system according to a second embodiment of the present invention.
FIG. 5 is a sequence diagram showing a transmission sequence when a transmission system abnormality occurs in the power system monitoring control system according to the second embodiment of the present invention.
FIG. 6 is a sequence diagram showing another transmission sequence when a transmission system abnormality occurs in the power system monitoring control system according to the second embodiment of the present invention.
FIG. 7 transmits state change information generated while the transmission relay apparatus duplexed in the standby mode and the normal mode switches between the operation modes in the power system monitoring control system according to the second embodiment of the present invention. The sequence diagram which showed the transmission sequence.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Monitoring control apparatus, 12 ... Line unit control apparatus, 13 ... Network, 14 ... State change detection means, 15 ... Memory | storage means, 16 ... Transmission means, 17 ... Transmission table, 18 ... Transmission relay apparatus, 19 ... Electric wire

Claims

A line-by-line control device that is distributed for each main circuit facility in the power system and detects state changes of the main circuit and related devices, and the state change information from the line-unit control device is input via the network to monitor the entire power system In a power system monitoring control system including a monitoring control device to control, a line unit control device receives a status signal of a power system facility and detects a status change, and the status change detection means detects Storage means for storing the state change information, and the state change information detected by the state change detection means are transmitted to the monitoring control device via the network, and the transmission of the state change information fails due to the occurrence of an abnormality and thereafter When the abnormality is recovered, an abnormality return notification is transmitted to the monitoring control device, and the state change information generated during the abnormal state is transmitted from the monitoring control device. Power system monitoring control system comprising the transmitting means when receiving a seek is to transmit the state change information that occurred during abnormality in the monitoring control unit.

When the supervisory control device receives the abnormal recovery notification, the supervisory control device designates a time for the line unit control device and state change information stored in the storage means in the line unit control device after the designated time The power system monitoring and control system according to claim 1, wherein a transmission request is transmitted.

A line-by-line control device that is distributed for each main circuit facility in the power system and detects state changes of the main circuit and related devices, and the state change information from the line-unit control device is input via the network to monitor the entire power system In a power system monitoring control system including a monitoring control device to control, a line unit control device receives a status signal of a power system facility and detects a status change, and the status change detection means detects Storage means for storing the state change information, the state change information detected by the state change detection means is transmitted to the monitoring control device via the network, and a reception notification from the monitoring control device is received and an abnormality occurs. In the case where no reception of the reception notification is received and an abnormal recovery notification is received from the monitoring and control device, this occurs in an abnormal state for the monitoring and control device. Power system monitoring control system characterized by comprising a transmission means for transmitting the status change information.

The transmission unit of the line unit control device stores a transmission completion flag in the storage unit when receiving a reception notification from the monitoring control device, and the storage unit when receiving an abnormal return notification from the monitoring control device 4. The power system monitoring and control system according to claim 3, wherein the transmission completion flag is checked and the state change information not yet transmitted is transmitted to the monitoring control device.

Between the line unit control device and the monitoring control device, a duplexed normal and standby transmission relay device is provided, and the line unit control device is configured to switch the operation mode of the transmission relay device. 5. The power system monitoring control according to claim 1, wherein state change information generated during the operation mode switching is transmitted to the monitoring control device at the end of the mode switching. system.

Means for detecting a change in state by inputting a state signal of equipment in the power system, means for storing the detected state change information, and supervisory control for monitoring and controlling the detected power supply via the network Means for transmitting to the apparatus, means for transmitting an abnormal return notification to the monitoring control apparatus when the transmission of the state change information fails due to the occurrence of an abnormality, and the abnormality is subsequently recovered, and an abnormal state from the monitoring control apparatus A program that, when receiving a request for transmission of state change information that has occurred, functions as means for transmitting state change information that has occurred during an abnormality to a monitoring control device.

Means for detecting a change in state by inputting a state signal of equipment in the power system, means for storing the detected state change information, and supervisory control for monitoring and controlling the detected power supply via the network Means for transmitting to the device and receiving the reception notification from the monitoring control device, and when receiving an abnormal return notification from the monitoring control device without receiving the reception notification due to occurrence of abnormality, to the monitoring control device A program that functions as means for transmitting state change information that has occurred during an abnormal state.