JP2004343922A

JP2004343922A - Distribution system monitoring and controlling device

Info

Publication number: JP2004343922A
Application number: JP2003139088A
Authority: JP
Inventors: Koji Hikita; 孝治疋田; Yumiko Kosakata; 由美子小坂田
Original assignee: TMT & D KK
Current assignee: TMT & D KK
Priority date: 2003-05-16
Filing date: 2003-05-16
Publication date: 2004-12-02
Anticipated expiration: 2023-05-16
Also published as: JP4094483B2

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that, if a configuration change in a distribution system causes protective functions to be put into an unharmonious state among fault-current detecting relays, it becomes hardly possible to correctly follow which path the fault current flowed in, and consequently situations are brought about that a failure point cannot be determined or it is wrongly determined. <P>SOLUTION: When the distribution system is changed, a setting value monitoring means 107 monitors setting values of fault-current detecting relays of switches after the change of the system. When the setting values are found inconsistent to the setting values of fault-current detecting relays provided on distribution breakers, an appropriate setting value calculating means 104 resets the setting values of the fault-current detecting relays of the switches so as to make them consistent. A setting value setting means 103 sets and controls the relay setting values outputted from the appropriate setting value calculating means 104 to the fault-current detecting relays provided on the switches that the setting values are set for via a remote monitoring and controlling device 102. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は配電系統の系統状態を監視制御する配電系統監視制御装置に関する。
【０００２】
【従来の技術】
従来、配電系統に故障が発生した場合、一般に次のような故障地点判定方法が採用されている。すなわち、各開閉器の故障電流検出リレーの故障検出信号と、配電区間相互が電気的にどのように接続されているかを示すつながり情報とから故障電流の流れた経路を把握し、この経路の末端部分が故障地点であると判定する方法である。
【０００３】
ここで、つながり情報とは、配電区間相互がどのように接続されているかを示す情報、配電線用遮断器の投入・遮断状態信号および開閉器の開閉状態信号から得られる情報である。
【０００４】
各開閉器に装備した故障電流検出リレーの整定値設定は、故障電流検出リレーを開閉器に新たに装備する場合や、故障電流検出リレーの不正動作が度重なった場合などに実施しており、配電系統の一時的な変化に伴う整定値設定は実施していなかった。
【０００５】
このため、配電系統が系統操作などによって変化した場合または配電系統が拡張または変更などによって変化した場合など、配電線用遮断器の故障電流検出リレーおよび配電系統を構成する各開閉器の故障電流検出故障電流検出リレー間の保護協調がとれていない状態（故障電流を検出できない故障電流検出リレーや正常な範囲であっても故障電流として検出してしまう故障電流検出リレーが存在する状態）で配電系統の運用が長い時間継続されることが懸念される。
【０００６】
また、配電系統に流れる電流が電力需要の推移により変化した場合は、配電線用遮断器の故障電流検出リレーおよび配電系統を構成する各開閉器の故障電流検出リレーに当初設定した整定値が不適切な値となり、この場合も故障電流を検出できないかまたは正常な電流でも故障電流として検出してしまうという事態を招くことも懸念される。
【０００７】
【発明が解決しようとしている課題】
このように各故障電流検出リレー間で保護協調がとれていない状態になったり、電力需要の推移により当初設定した整定値が不適切な状態になると、故障電流の流れた経路を正しく把握することができなくなり、その結果として故障地点が判定できないとか、もしくは故障地点を誤判定するといった事態を招くことが懸念されていた。
【０００８】
本発明の目的は、配電系統が系統操作、拡張または変更などによって変化した場合、あるいは配電系統に流れる電流が電力需要の推移により変化した場合であっても、配電線用遮断器および各開閉器にそれぞれ装備した故障電流検出リレー間で常に保護協調がとるようにして、故障地点判定の誤りを防止することのできる配電系統監視制御装置を提供することにある。
【０００９】
【課題を解決するための手段】
上記の目的を達成するため、請求項１に係る配電系統監視制御装置の発明は、配電線用遮断器に接続され区分開閉器によって適宜の配電区間に区分された配電系統における前記配電線用遮断器の投入遮断状態信号と、前記区分開閉器の開閉状態信号と、配電線の連係点に位置する開閉器の開閉状態信号と、前記配電線用遮断器、各区分開閉器および連係点に位置する開閉器にそれぞれ装備されて各配電区間に流れる故障電流を検出する故障電流検出リレーの故障検出信号と、配電区間相互がどのように接続されているかを示す情報および前記配電線用遮断器の投入遮断状態信号および前記各開閉器の開閉状態信号から得られる配電区間相互が電気的にどのように接続されているかを示すつながり情報と、各配電線の負荷電流情報と、予め設定されているかあるいは遠方監視制御装置を介して取得した区間負荷電流情報と、配電系統を構成する各設備機器の諸元情報と、過去の実績あるいは予測から導出した将来の負荷電流の変化を単位時間毎に表した負荷曲線情報とを用いて配電系統の運用を行う配電系統監視制御装置において、遠方監視制御装置が取得した各配電線用遮断器の故障電流検出リレーの整定値を入力して保持するリレー整定値設定情報ファイルと、予め定義された整定値監視条件のもとで、前記遠方監視制御装置を介して監視制御対象配電系統の状態情報を監視し、系統状態の変化によって配電線用遮断器のリレー整定値と開閉器のリレー整定値との間に不整合が生じるか否かを判定する整定値監視手段と、この整定値監視手段によって不整合と判定されたとき、前記リレー整定値設定情報ファイルに格納されているリレー整定値設定情報を用いて該当する故障電流検出リレーの整定値を、前記リレー整定値設定情報と整合するように算出する適正整定値算出手段と、前記適正整定値算出手段が算出したリレー整定値を、遠方監視制御装置を介して対象開閉器の故障電流検出リレーに設定制御する整定値設定手段と、を有することを特徴とする。
【００１０】
また、請求項２に係る配電系統監視制御装置の発明は、配電線用遮断器に接続され区分開閉器によって適宜の配電区間に区分された配電系統における前記配電線用遮断器の投入遮断状態信号と、前記区分開閉器の開閉状態信号と、配電線の連係点に位置する開閉器の開閉状態信号と、前記配電線用遮断器、各区分開閉器および連係点に位置する開閉器にそれぞれ装備されて各配電区間に流れる故障電流を検出する故障電流検出リレーの故障検出信号と、配電区間相互がどのように接続されているかを示す情報および前記配電線用遮断器の投入遮断状態信号および前記各開閉器の開閉状態信号から得られる配電区間相互が電気的にどのように接続されているかを示すつながり情報と、各配電線の負荷電流情報と、予め設定されているかあるいは遠方監視制御装置を介して取得した区間負荷電流情報と、配電系統を構成する各設備機器の諸元情報と、過去の実績あるいは予測から導出した将来の負荷電流の変化を単位時間毎に表した負荷曲線情報とを用いて配電系統の運用を行う配電系統監視制御装置において、遠方監視制御装置が取得した各配電線用遮断器の故障電流検出リレーの整定値を入力して保持するリレー整定値設定情報ファイルと、前記遠方監視制御装置を介して監視制御対象配電系統の拡張や変更などによる設備機器の増設・変更が検出された場合、監視制御対象系統内の開閉器のリレー整定値の再設定が必要か否かを、予め定められたまたは運用者が任意に設定した条件のもとで判定する設備変更内容判定手段と、この設備変更内容判定手段によってリレー整定値の再設定が必要と判定された場合、前記リレー整定値設定情報ファイルに格納されているリレー整定値設定情報を用いて該当する故障電流検出リレーの整定値を、前記リレー整定値設定情報と整合するように算出する適正整定値算出手段と、前記適正整定値算出手段が算出したリレー整定値を、遠方監視制御装置を介して対象開閉器の故障電流検出リレーに設定制御する整定値設定手段と、を有することを特徴とする。
【００１１】
さらに、請求項４に係る配電系統監視制御装置の発明は、配電線用遮断器に接続され区分開閉器によって適宜の配電区間に区分された配電系統の各配電区間相互がどのように接続されているかを示す情報および配電線用遮断器の投入遮断状態信号および開閉器の開閉状態信号から得られる配電区間相互が電気的にどのように接続されているかを示すつながり情報と、各配電線の負荷電流情報と、予め設定されているかあるいは遠方監視制御装置を介して取得した区間負荷電流情報と、配電系統を構成する各設備機器の諸元情報とを用いて、任意の系統故障について故障電流計算を行う故障電流計算手段と、前記任意の系統の故障情報を設定する故障情報設定手段と、故障電流計算手段を実行する時刻または周期を設定する時刻周期設定手段と、前記故障電流計算手段が算出した故障電流値から前記配電線用遮断器および開閉器に装備されている故障電流検出リレーの適正整定値を算出する適正整定値算出手段と、を有することを特徴とする。
【００１２】
【発明の実施の形態】
以下、図面を参照して本発明の実施の形態について説明する。なお、各実施の形態の図を通して同一の要素および機能については、同一符号または関連符号をつけて対応させることにより説明を省略する。
【００１３】
（第１の実施の形態）
図１は、本発明による配電系統監視制御装置の第１の実施の形態を示す構成図である。
図１において、ＤＡ、ＤＢは配電線用遮断器ＦＣＢ−ＡおよびＦＣＢ−Ｂによって図示しない変電所母線に接続された配電系統であり、一方の配電系統ＤＡは区分開閉器ＳＷ−Ａ、ＳＷ−ＢおよびＳＷ−Ｃにより複数の配電区間ＤＡ１、ＤＡ２、ＤＡ３およびＤＡ４に区分され、また他方の配電系統ＤＢは区分開閉器ＳＷ−Ｅにより配電区間ＤＢ１、ＤＢ２に区分されている。そしてこれら配電系統ＤＡ、ＤＢの末端区間ＤＡ４、ＤＢ２は区分開閉器ＳＷ−Ｄにより連係接続されている。この末端の接続部を連係点と言う。
【００１４】
図示した配電系統の運用時は、連係点（黒丸印）の区分開閉器ＳＷ−Ｄは常開に、他の白丸印の区分開閉器は常閉にそれぞれ設定されている。このため、配電区間ＤＡ１、ＤＡ２、ＤＡ３およびＤＡ４には配電線用遮断器ＦＣＢ−Ａを通して電力が供給され、一方配電区間ＤＢ１およびＤＢ２には配電線用遮断器ＦＣＢ−Ｂを通して電力が供給される。
【００１５】
また、各配電線用遮断器ＦＣＢ−ＡおよびＦＣＢ−Ｂ、各区分開閉器ＳＷ−Ａ、ＳＷ−Ｂ、ＳＷ−Ｃ、ＳＷ−ＤおよびＳＷ−Ｅにはそれぞれ故障電流検出リレーＲｙ−ＦＡ、Ｒｙ−ＦＢ、Ｒｙ−Ａ、Ｒｙ−Ｂ〜Ｒｙ−Ｅを装備している。
【００１６】
１０２は遠方監視制御装置であり、配電線用遮断器ＦＣＢ−Ａ、ＦＣＢ−Ｂの投入遮断状態信号、各開閉器ＳＷ−Ａ、ＳＷ−Ｂ、ＳＷ−Ｃ、ＳＷ−Ｄ、ＳＷ−Ｅの開閉状態信号、各配電線の区間負荷電流、配電線用遮断器ＦＣＢ−Ａ、ＦＣＢ−Ｂに装備した故障電流検出リレーＲｙ−ＦＡ、Ｒｙ−ＦＢの整定値等の入力情報を監視するとともに、各区間負荷電流情報、リレー整定値を後述する配電系統監視制御装置１０１に渡し、逆に後述する配電系統監視制御装置１０１からのリレー整定値設定情報を前記各故障電流検出リレーに渡すように機能する。
【００１７】
前記配電系統監視制御装置１０１は、電子計算機等のディジタル演算装置によって構成される各種の機能実現手段の他に各種情報を格納する複数の情報ファイルを備えている。この機能実現手段は、前記遠方監視制御装置１０２を介して取得した上記配電線用遮断器の投入遮断状態信号、各開閉器の開閉状態信号および投入遮断信号と開閉器状態信号から作成する配電系統のつながり情報、配電線の各区間負荷電流情報および前記各故障電流検出リレーの情報や予め設定されている各種情報を用いて前記各配電線用遮断器および各開閉器を監視し、その監視結果に基づいて前記遠方監視制御装置１０２を介して前記故障電流検出リレーＲｙ−Ａ、Ｒｙ−Ｂ〜Ｒｙ−Ｅに対して整定値制御を行うように機能する。
【００１８】
以下、配電系統監視制御装置１０１について詳細に説明する。配電系統監視制御装置１０１は、各種の情報を格納するファイルとして、リレー整定値設定情報ファイル１０５、負荷電流情報ファイル１０８、区間負荷電流情報ファイル１０９、負荷曲線情報ファイル６０３、つながり情報ファイル１１０および諸元情報ファイル１１１等の各種情報ファイルを備えている。
【００１９】
ここで、前記リレー整定値設定情報ファイル１０５は、前記遠方監視制御装置１０２を介して取得した各配電線用遮断器ＦＣＢ−ＡおよびＦＣＢ−Ｂの故障電流検出リレーＲｙ−ＦＡ、Ｒｙ−ＦＢの整定値を保持するファイルであり、負荷電流情報ファイル１０８とは、各配電線の負荷電流値を保存するファイルである。
【００２０】
また、区間負荷電流情報ファイル１０９とは予め設定されているかあるいは前記遠方監視制御装置１０２を介して取得した配電線各区間の負荷電流情報をするファイルであり、負荷曲線情報ファイル６０３とは過去の実績または予測から導出した将来の負荷電流の変化を単位時間毎に表した情報を格納するファイルであり、諸元情報ファイル１１１とは配電系統を構成する各設備機器の定格値などの諸元情報を格納するファイルである。
【００２１】
さらに、つながり情報ファイル１１０とは配電区間相互がどのように接続されているかを示す情報、配電線用遮断器の投入遮断状態信号および開閉器の開閉状態信号から得られる配電区間相互が電気的にどのように接続されているかを示すつながり情報を格納するファイルである。
【００２２】
一方、配電系統監視制御装置１０１は、各種の機能実現手段として、整定値監視手段１０７、適正整定値算出手段１０４および整定値設定手段１０３等の機能実現手段を備えている。
【００２３】
ここで、前記整定値監視手段１０７は、整定値監視条件１０６によって定められた周期や動作条件で監視制御対象の配電系統の状態変化を監視し、系統状態の変化によって、配電線用遮断器のリレー整定値と開閉器のリレー整定値との間に不整合が生じるかどうかを判定する。
【００２４】
適正整定値算出手段１０４は、この整定値監視手段１０７から出力される前記故障電流検出リレーＲｙ−Ａ、Ｒｙ−Ｂ〜Ｒｙ−Ｅの整定値と前記ファイル１０５に設定されているリレー整定値設定情報とを比較して両者の保護協調がとれているかどうかの確認、すなわち、整定値監視手段１０７の出力とリレー整定値設定情報ファイル１０５の記憶内容とが同値であるか否かを確認し、同値の場合その整定値をそのまま出力し、同値でない場合開閉器のリレー整定値を遮断器のリレー整定値に合せるように整定値を算出して出力する。
【００２５】
整定値設定手段１０３は、この適正整定値算出手段１０４から出力されたリレー整定値を前記遠方監視制御装置１０２に出力し、この遠方監視制御装置１０２から整定値設定対象の開閉器に装備されている故障電流検出リレーの設定制御を行う。
【００２６】
図２は前記負荷電流情報ファイル１０８の構成の一例を示す図であり、各配電線遮断器ＦＣＢ−Ａ、ＦＣＢ−Ｂ、ＦＣＢ−Ｃ…ＦＣＢ−ｎに接続される配電線ＤＡ、ＤＢ、ＤＣ…Ｄｎに流れる負荷電流の値を格納している。図３は区間負荷電流情報ファイル１０９の構成の一例を示す図であり、図ではＦＣＢ−Ａに接続される配電系統ＤＡの各配電線ＤＡ１、ＤＡ２、ＤＡ３…ＤＡｎに流れる各区間負荷電流情報を格納している。また、図４は諸元情報を格納するファイルの構成の一例を示す図であり、配電系統を構成する各設備機器（配電線遮断器ＦＣＢ，区分開閉器ＳＷ，区間…）毎に定格値等の諸元情報、例えば配電線遮断器ＦＣＢであれば、その結線方式、周波数、電圧…が、区分開閉器ＳＷであれば容量…が、また各配電区間であれば経路長、インピーダンス、断面積…が、それぞれ格納されている。
【００２７】
そして図６は負荷曲線情報ファイル６０３の構成の一例を示す図であり、各配電線ＤＡ、ＤＢ…、Ｄｎ、そして区分された各区間ＤＡ１、ＤＡ２…ＤＡｌは単位時間（０：００、１：００、…２３：００）毎に過去の実績または予測から導出した将来の負荷電流値を記憶している。
【００２８】
次に、以上のように構成した配電系統監視制御装置１０１の作用について説明する。整定値監視条件１０６によって動作条件が定義された整定値監視手段１０７は、遠方監視制御装置１０２が取得した監視制御対象である配電系統の状態情報を監視する。ここで配電系統の状態情報とは、遠方監視制御装置１０２を介して入力される配電系統構成設備機器（配電線遮断器、開閉器、各区間等）の入切状態情報、運用状態情報、異常状態情報や、運転員からの連絡を元に配電系統監視制御装置１０１内の設備機器情報を設定した内容およびリレー整定値などである。
【００２９】
整定値監視手段１０７は、遠方監視制御装置１０２を介して入力される系統状態に変化があった場合、その変化により配電系統のリレー整定値に不整合が生じるかどうかを判定する。
【００３０】
図１に示すように、当初配電系統ＤＡおよびＤＢの連係点は区分開閉器ＳＷ−Ｄであったが、系統操作による配電系統状態の変化または系統操作を伴わない配電系統状態の変化により連係点が区分開閉器ＳＷ−ＤからＳＷ−Ｂに変更されたとき、区分開閉器ＳＷ−Ｃの所属は当初の配電線用遮断器ＦＣＢ−Ａ側からＦＣＢ−Ｂ側に移り替わる。
【００３１】
整定値監視手段１０７は、区分開閉器の所属替えが行われたとき、配電線用遮断器ＦＣＢ−Ａの故障電流検出リレーの整定値と、ＦＣＢ−Ｂの故障電流検出リレーの整定値とが互いに異なっていたとすると、リレー整定値に不整合が生じると判定し、適正整定値算出手段１０４に対して整定値の更新が必要であることを通知する。例えば、ＦＣＢ−Ａ側の配電線は整定値が３０［Ａ］、ＦＣＢ−Ｂ側の配電線は整定値が３５［Ａ］に設定されているものとする。そして前述のように区分開閉器ＳＷ−Ｃの所属が当初の配電線用遮断器ＦＣＢ−Ａ側からＦＣＢ−Ｂ側に変化したときに、区分開閉器ＳＷ−Ｃに装備されている故障電流検出リレーの整定値は、３５［Ａ］に切替わるべきところ、３０［Ａ］の状態になっている。
そこで、整定値監視手段１０７は区分開閉器ＳＷ−Ｃの故障電流検出リレーの整定値が３０［Ａ］という内容を出力する。
【００３２】
適正整定値算出手段１０４は、整定値監視手段１０７の出力を入力して、この入力情報と前記リレー整定値設定情報ファイル１０５に格納されている情報とを比較し、前記区分開閉器ＳＷ−Ｃに対して該当するリレー整定値設定情報ファイル１０５に格納されている情報に基づいて、３５［Ａ］というリレー整定値を算出し、出力する。
【００３３】
整定値設定手段１０３は、この適正整定値算出手段１０４の算出結果を受けて遠方監視制御装置１０２を介して該当する区分開閉器ＳＷ−Ｃに装備された故障電流検出リレーの整定値を３５［Ａ］という適正な値に設定制御する。
【００３４】
以上述べたように、第１の実施の形態によれば、配電系統に変化が発生し、変化後において区分開閉器に装備された故障電流検出リレーの整定値が変化しても、速やかに変化後の配電系統側の配電線用遮断器に装備された故障電流検出リレーと整合する整定値に再設定することができるため、配電系統に変化後も故障電流検出リレー間の保護協調がとれた状態を保持することができる。このように、常に故障電流検出リレー間の保護協調がとれるため、配電線用遮断器が遮断したのに、区分開閉器に装備した故障電流検出リレーが故障電流を検出しないというような不一致になる事態を防止することができ、故障地点判定の誤りを防止することができる。
【００３５】
（第２の実施の形態）
図６は、本発明による配電系統監視制御装置の第２の実施の形態を示す構成図である。本実施の形態は、図６で示すように前記第１の実施の形態の一部の機能を変更したもので、前記第１の実施の形態がリレー整定値設定情報ファイル１０５の情報を遠方監視制御装置１０２を介して実際の配電系統からの情報を取り入れるのに対し、本実施の形態の場合は配電系統監視制御装置２０１に整定値入力手段２０２を新たに設けて、この整定値入力手段２０２から整定値を取り入れるように構成したものである。
【００３６】
この整定値入力手段２０２は、配電系統毎に監視制御対象系統内の配電線用遮断器ＦＣＢ−Ａ、ＦＣＢ−Ｂ、区分開閉器ＳＷ−Ａ、ＳＷ−Ｂ、ＳＷ−Ｃ、ＳＷ−Ｄ、ＳＷ−Ｅにそれぞれ装備した故障電流検出リレーＲｙ−ＦＡおよびＲｙ−ＦＢ、Ｒｙ−Ａ、Ｒｙ−Ｂ〜Ｒｙ−Ｅの整定値を各配電区間単位ＤＡ１〜ＤＡ４、ＤＢ２に入力して設定するように構成されている。
その他については第１の実施の形態の場合と同じなので説明を省略する。
【００３７】
次に、本実施の形態の作用について説明する。
整定値入力手段２０２は、監視制御対象系統内の配電線用遮断器ＦＣＢ−Ａ、ＦＣＢ−Ｂ、区分開閉器ＳＷ−Ａ、ＳＷ−Ｂ〜ＳＷ−Ｅにそれぞれ装備された故障電流検出リレーＲｙ−ＦＡ、Ｒｙ−ＦＢ、Ｒｙ−Ａ、Ｒｙ−Ｂ〜Ｒｙ−Ｅの整定値を各配電区間単位に入力して設定し、この設定した情報をリレー整定値設定情報ファイル１０５に保存する。
【００３８】
なお、この他の作用すなわち整定値監視手段１０７が配電系統の状態を監視し、リレー整定値の不整合発生を予想して適正整定値算出手段１０４に通知し、該当機器に対してリレー整定値を再設定する方法については、第１の実施の形態で述べたとおりであるので説明を省略する。
【００３９】
以上のように、第２の実施の形態によれば、配電系統に変化が発生しても、変化があった配電系統に所属する配電線用遮断器および各区分開閉器の故障電流検出リレーは、速やかにそれぞれが整合した整定値に設定し直すことができるため、故障電流検出リレー間の保護協調がとれた状態を保持することができる。
【００４０】
このように常にリレーの保護協調がとれているため、ある区分開閉器の故障電流検出リレーが、故障電流を検出しているのに、別の区分開閉器の故障電流検出リレーが故障電流を検出していないというような不一致になる事態を防止することができ、故障地点判定の誤りを防止することができる。
【００４１】
また、再設定するリレー整定値を、運用者が運用状況に応じて整定値入力手段２０２を介して任意に設定できるため、故障検出の精度をきめ細かく調整することができる。
【００４２】
（第３の実施の形態）
図７は、本発明による配電系統監視制御装置の第３の実施の形態を示す構成図である。本実施の形態の配電系統監視制御装置３０１は、図７で示すように、図１の整定値監視条件１０６および整定値監視手段１０７の替わりに設備変更内容判定条件３０１および設備変更内容判定手段３０２を新たに備えるように構成したものである。その他は図１の場合と同じなので説明は省略する。
【００４３】
本実施の形態による配電系統監視制御装置３０１は、配電系統の拡張や変更などにより配電系統を構成する設備機器が増設または変更された場合に、それに伴って監視制御対象系統内の区分開閉器に装備した故障電流検出リレーの整定値の再設定が必要かどうかを予め定められた条件または運用者が任意に設定した条件に基づいて判定する設備変更内容判定手段３０２を設け、さらにこの設備変更内容判定手段３０２の動作する条件を定義する設備変更内容判定条件３０３を備えるように構成したものである。
【００４４】
前記設備変更内容判定条件３０３は、監視制御対象系統内の開閉器のリレー整定値に対して再設定が必要となる配電系統を構成する設備機器の増設あるいは変更内容を前記設備変更内容判定手段３０２が動作する条件として定義するものである。
【００４５】
前記設備変更内容判定手段３０２は、遠方監視制御装置１０２を介して入力する入切情報、および前記設備変更内容判定条件３０３によって定義された動作条件に基づいて、監視制御対象である配電系統に対する拡張や変更などによる配電系統を構成する設備機器（区分開閉器）の増設あるいは変更を監視する。
【００４６】
図７に示すように、当初区分開閉器ＳＷ−Ｄが配電系統ＤＡおよびＤＢの連係であったが、その後連係点が開閉器ＳＷ−ＤからＳＷ−Ｂに変更になると、変更範囲に含まれる開閉器ＳＷ−Ｃへの電力供給配電線がＤＡからＤＢに変更になる。
【００４７】
設備変更内容判定手段３０２は、変更前の配電線遮断器ＦＣＢ−Ａと変更後の配電線遮断器ＦＣＢ−Ｂの故障電流検出リレーＲｙ−ＦＡ、Ｒｙ−ＦＢの整定値が互いに異なっている場合、故障電流検出リレーの整定状態に不整合が生じるおそれがあることを理由にリレー整定値の再設定が必要であると判定し、その結果を適正整定値算出手段１０４に対して整定値の更新が必要であることを通知する。
【００４８】
また、設備変更内容判定手段３０２は、設備機器の変更内容が開閉器ＳＷ−Ｅの取替えのように、リレー整定値に影響を及ぼさないものであれば、故障電流検出リレーの整定値の再設定は不要であると判定するが、設備機器変更によりリレー整定値の再設定が必要であると判断した場合、適正整定値算出手段１０４に対して整定値の更新が必要であることを通知する。
【００４９】
適正整定値算出手段１０４は、適正整定値算出手段１０４からの通知を受けて整定値の算出が必要なＳＷ−Ｃに対して、該当するリレー整定値設定情報１０５に基づいたリレー整定値を算出し出力する。
整定値設定手段１０３は、設備変更内容判定手段３０２の算出結果に基づいて開閉器ＳＷ−Ｃに装備された故障電流検出リレーＲｙＣの整定値を設定制御する。
【００５０】
以上述べたように第３の実施の形態によれば、配電系統に拡張または変更があっても、当該配電系統に所属する全区分開閉器に装備された故障電流検出リレーは、速やかに当該配電線の配電線用遮断器に装備された故障電流検出リレーと整合した整定値に設定することができるため、故障電流検出リレー間の保護協調がとれた状態を保持することができる。
【００５１】
このように常に故障電流検出リレー間の保護協調がとれているため、配電線用遮断器が遮断したのに、開閉器は故障電流を検出していないというような不一致になる事態を防止することができ、故障地点判定の誤りを防止することができる。
【００５２】
（第４の実施の形態）
図８は、本発明による配電系統監視制御装置の第４の実施の形態を示す構成図である。この第４の実施の形態による配電系統監視制御装置４０１は、第２の実施の形態の一部と第３の実施の形態の一部とを併せて構成したものである。
【００５３】
すなわち、本実施の形態による配電系統監視制御装置４０１の整定値入力手段２０２およびこの整定値入力手段２０２によって入力された整定値を保存するリレー整定値設定情報１０５は、第２の実施の形態で述べた整定値入力手段２０２およびリレー整定値設定情報１０５と同じである。また、設備変更内容判定手段３０２が配電系統の拡張や変更などにより配電系統を構成する設備機器が増設あるいは変更された場合に、その増設あるいは変更により監視制御対象系統内の開閉器のリレー整定値を再設定する要否を判定し、さらに判定結果を適正整定値算出手段１０４に通知し、該当機器に対してリレー整定値を再設定する方法は、第３の実施の形態に述べたとおりである。
【００５４】
以上のように本実施の形態によれば、配電系統の拡張または変更があっても、変更があった配電線に所属する配電線用遮断器および各区分開閉器に装備した故障電流検出リレーを、速やかに整合した整定値に再設定することができ、故障電流検出リレー間の保護協調がとれている状態を保持することができる。
【００５５】
この結果、ある開閉器の故障電流検出リレーは、故障電流を検出しているのに、別の開閉器の故障電流検出リレーは、故障電流を検出していないというような不一致になる事態を防止することができ、故障地点判定の誤りを防止することができる。
【００５６】
また、再設定するリレー整定値を、運用状況に応じて整定値入力手段により運用者が任意に設定できるため、故障検出の精度をきめ細かく調整することができる。
【００５７】
（第５の実施の形態）
図９は、本発明による配電系統監視制御装置の第５の実施の形態を示す構成図である。
本実施の形態は、配電系統を流れる電流の状況に応じて開閉器の故障電流検出リレー整定値を設定制御することができるようにしたものである。このために、本実施の形態による配電系統監視制御装置５０１は、整定値監視手段１０７および整定値監視条件１０６に代えて故障電流計算手段５０３および故障情報設定手段５０４を設け、さらに故障電流計算手段５０３の実行する時刻または周期を設定するための時刻周期設定手段５０２を設けている。また、故障電流計算手段５０３は負荷電流情報ファイル１０８、区間負荷電流ファイル１０９、つながり情報ファイル１１０および諸元情報ファイル１１１からそれぞれの格納情報を入力するように構成している。
【００５８】
以上の構成において、配電系統監視制御装置５０１は、遠方監視制御装置１０２により配電線用遮断器ＦＣＢ−Ａの投入・遮断状態および開閉器ＳＷ−Ａ〜ＳＷ−Ｄの開閉状態を監視し、この監視結果から配電区間相互がどのように接続されているかを示すつながり情報を作成しファイル１１０に格納する。
【００５９】
故障電流計算手段５０３は、前記時刻周期設定手段５０２によって設定された時刻または周期で、故障情報設定手段５０４による想定故障内容（１線地絡、三相短絡、線間短絡等の故障様相および故障地点）と、つながり情報１１０、負荷電流情報１０８、区間負荷電流情報１０９および諸元情報１１１とを用いて故障電流計算法により故障電流値を算出する。
【００６０】
適正整定値算出手段１０４は、前記故障電流計算手段５０３により算出された故障電流値から設定すべき故障電流検出リレーの整定値を求める。この適正整定値算出手段１０４が得た故障電流検出リレーの整定値は整定値設定手段１０３へ通知される。整定値設定手段１０３は、この通知を受けて遠方監視制御装置１０２を介して故障電流検出リレー整定値を適正整定値へ設定制御する。
【００６１】
以上述べたように第５の実施の形態によれば、配電系統を流れる電力の状況に応じたリレー整定値を故障電流検出リレーへ設定制御することができる。これにより故障電流の検出が正確にできるようになり、故障地点の判定を正確に実施できる。
【００６２】
（第６の実施の形態）
図１０は、本発明による配電系統監視制御装置の第６の実施の形態を示す構成図である。本実施の形態による配電系統監視制御装置６０１は、第５の実施の形態（図９）に対して、過去の実績または予測から導出した将来の負荷電流の変化を単位時間毎に表した負荷曲線情報６０３と、この負荷曲線情報６０３から将来の任意の時刻における負荷電流情報１０８´および区間負荷電流情報１０９´を予測する負荷予測手段６０２とを追加したものである。
【００６３】
配電系統監視制御装置６０１が、遠方監視制御装置１０２により配電線用遮断器の投入遮断状態、開閉器の開閉状態を監視し、この結果から配電区間相互がどのように接続されているかを示すつながり情報１１０を作成することは既に述べた実施の形態と同じである。
【００６４】
負荷予測手段６０２は、負荷曲線情報ファイル６０３に格納されている負荷曲線情報から将来の任意の時刻における負荷電流情報および区間負荷電流情報を予測する。なお、１０８´は負荷電流情報ファイル、１０９´は区間負荷電流情報ファイルである。また、負荷曲線情報６０３は一例を既に図５で示したように、各配電線ＤＡ、ＤＢ…、Ｄｎ、そして区分された各区間ＤＡ１、ＤＡ２…ＤＡｌは単位時間（０：００、１：００、…２３：００）毎に過去の実績または予測から導出した将来の負荷電流値を記憶している。
【００６５】
故障情報設定手段５０４は、想定する故障内容を（１線地絡、三相短絡、線間短絡といった故障様相および故障地点）を設定し、故障電流計算手段５０３は、時刻周期設定手段５０２によって設定された時刻または周期で故障電流計算を実行する。
【００６６】
このとき故障電流計算手段５０３は、時刻周期設定手段５０２によって設定された任意の時刻または任意の周期で故障情報設定手段５０４が設定した想定故障内容と、つながり情報ファイル１１０に格納されている情報と、負荷予測手段６０２が予測した将来の任意の時刻における負荷電流情報ファイル１０８´に格納されている情報と、区間負荷電流情報ファイル１０９´に格納されている情報と、諸元情報ファイル１１１に格納されている情報とを用いて故障電流値を算出する。
【００６７】
適正整定値算出手段１０４は、故障電流計算手段５０３が算出した故障電流値から設定すべき故障電流検出リレーの整定値を求める。適正整定値算出手段１０４が得た故障電流検出リレーの整定値は、整定値設定手段１０３へ通知される。整定値設定手段１０３は、遠方監視制御装置１０２を介して、故障電流検出リレー整定値を適正整定値へ設定制御する。
【００６８】
以上述べたように、第６の実施の形態によれば、将来の任意の時刻に配電系統を流れる電力の状況に応じたリレー整定値を把握することができ、電力状況の推移に遅滞なく、故障電流検出リレーの整定値を適正値へ設定制御することができる。この結果、故障電流の検出が正確にできるようになり、故障地点の判定を正確に実施することができる。
【００６９】
（第７の実施の形態）
図１１は、本発明による配電系統監視制御装置の第７の実施の形態を示す構成図である。本実施の形態による配電系統監視制御装置７０１は、図１１の構成図で示すように、１台で第１の実施の形態から第６の実施の形態に係わる配電系統監視制御装置の機能すなわち各種機能実現手段および各種情報ファイルを全て備え、かつこれら複数の機能の中から任意所望の機能を選択して実現できるように、機能活殺手段７０２を新たに設けるように構成したものである。
【００７０】
すなわち、配電系統監視制御装置７０１は、第１の実施の形態に係わる配電系統監視制御装置１０１、第２の実施の形態に係わる配電系統監視制御装置２０１、…第６の実施の形態に係わる配電系統監視制御装置６０１の機能を実現できるように遠方監視制御装置１０２、各種手段１０３〜１０７、２０２、３０２，３０３、５０２〜５０４、７０２、７０３、６０２、６０３および情報１０８´〜１１１まで全て備えている。そして機能活殺手段７０２によっていずれか一つの実施の形態の機能あるいは２つ以上の実施の形態を併せた場合の機能を選択して実現することができるように構成したものである。
【００７１】
以上述べたように第７の実施の形態によれば、１台の装置に第１の実施の形態から第６の実施の形態に係わる配電系統監視制御装置の機能を全て備え、かつ機能活殺手段７０２によりこれら複数の機能の中から必要により任意に選択した機能を実現できるように構成したので、配電系統の運用方法または各故障電流検出リレーの特性に応じて、故障電流検出リレーの使い分けを可能とすることができる。
【００７２】
【発明の効果】
以上述べたように、本発明によれば、配電系統が系統操作、拡張または変更などによって変化した場合、あるいは配電系統に流れる電流が電力需要の推移により変化した場合であっても、変化後において区分開閉器に装備された故障電流検出リレーの整定値が変化しても、速やかに変化後の配電系統側の配電線用遮断器に装備された故障電流検出リレーと整合する整定値に再設定し、常に故障電流検出リレー間の保護協調をとるように構成したので、配電線用遮断器が遮断したのに、区分開閉器に装備した故障電流検出リレーが故障電流を検出しないというような不一致になる事態を防止することができ、故障地点判定の誤りを防止することができる。
【図面の簡単な説明】
【図１】本発明による配電系統監視制御装置の第１の実施の形態を示す構成図。
【図２】第１の実施の形態における負荷電流情報ファイルの構成を示す図。
【図３】第１の実施の形態における区間負荷電流情報ファイルの構成を示す図。
【図４】第１の実施の形態における諸元情報ファイルの構成を示す図。
【図５】第１の実施の形態における負荷曲線情報ファイルの構成を示す図。
【図６】本発明による配電系統監視制御装置の第２の実施の形態を示す構成図。
【図７】本発明による配電系統監視制御装置の第３の実施の形態を示す構成図。
【図８】本発明による配電系統監視制御装置の第４の実施の形態を示す構成図。
【図９】本発明による配電系統監視制御装置の第５の実施の形態を示す構成図。
【図１０】本発明による配電系統監視制御装置の第６の実施の形態を示す構成図。
【図１１】本発明による配電系統監視制御装置の第７の実施の形態を示す構成図。
【符号の説明】
１０１…配電系統監視制御装置、１０２…遠方監視制御装置、１０３…整定値設定手段、１０４…適正整定値算出手段、１０５…リレー整定値設定情報、１０６…整定値監視条件、１０７…整定値監視手段、１０８、１０８´…負荷電流情報、１０９、１０９´…区間負荷電流情報、１１０…つながり情報、１１１…諸元情報、２０１…配電系統監視制御装置、２０２…整定値入力手段、３０１…配電系統監視制御装置、３０２…設備変更内容判定手段、３０３…設備変更内容判定条件、４０１…配電系統監視制御装置、５０１…配電系統監視制御装置、５０２…時刻周期設定手段、５０３…故障電流計算手段、５０４…故障情報設定手段、６０１…配電系統監視制御装置、６０２…負荷予測手段、６０３…負荷曲線情報、７０１…配電系統監視制御装置、７０２…機能活殺手段、ＦＣＢ−Ａ，ＦＣＢ−Ｂ…配電線用遮断器、ＳＷ−Ａ〜ＳＷ−Ｅ…開閉器、ＤＡ，ＤＢ…配電系統、ＤＡ１〜ＤＢ２…配電区間、Ｒｙ−ＦＡ，Ｒｙ−ＦＢ，Ｒｙ−Ａ〜Ｒｙ−Ｅ…故障電流検出リレー。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a distribution system monitoring and control device that monitors and controls the system state of a distribution system.
[0002]
[Prior art]
Conventionally, when a failure occurs in a power distribution system, the following failure point determination method is generally employed. In other words, the path through which the fault current flows is grasped from the fault detection signal of the fault current detection relay of each switch and the connection information indicating how the distribution sections are electrically connected to each other. This is a method for determining that a part is a failure point.
[0003]
Here, the connection information is information indicating how the distribution sections are connected to each other, information obtained from an ON / OFF state signal of a distribution line circuit breaker, and an ON / OFF state signal of a switch.
[0004]
The set value of the fault current detection relay provided for each switch is set when a fault current detection relay is newly installed on the switch or when the fault current detection relay is repeatedly operated improperly. No setting was made for temporary changes in the distribution system.
[0005]
For this reason, when the distribution system changes due to system operation or when the distribution system changes due to expansion or change, etc., the fault current detection relay of the distribution line breaker and the fault current detection of each switch constituting the distribution system Distribution system in a state where protection coordination between fault current detection relays is not taken (fault current detection relay that cannot detect fault current or fault current detection relay that detects fault current even in the normal range) There is a concern that the operation of the system will continue for a long time.
[0006]
If the current flowing in the distribution system changes due to changes in power demand, the set values initially set for the fault current detection relay of the breaker for distribution lines and the fault current detection relay of each switch constituting the distribution system will not be correct. The value becomes an appropriate value. In this case, there is a concern that a fault current cannot be detected or a normal current may be detected as a fault current.
[0007]
[Problems to be solved by the invention]
If the protection coordination between the fault current detection relays is not established or the set value initially set becomes inappropriate due to the change in power demand, it is necessary to correctly grasp the path through which the fault current has flowed. It has been feared that as a result, a failure point cannot be determined or a failure point is erroneously determined.
[0008]
An object of the present invention is to provide a distribution line breaker and each switch even when the distribution system changes due to system operation, expansion or change, or even when the current flowing in the distribution system changes due to changes in power demand. It is an object of the present invention to provide a distribution system monitoring and control device capable of always performing protection coordination between the fault current detection relays respectively provided in the power distribution system and preventing errors in fault point determination.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, an invention of a distribution system monitoring and control device according to claim 1 is a method for controlling a distribution line in a distribution system which is connected to a distribution line circuit breaker and divided into appropriate distribution sections by a division switch. Switching on / off state signal of the switch, the open / closed state signal of the segmented switch, the open / closed state signal of the switch located at the connection point of the distribution line, and the circuit breaker for the distribution line, located at each section switch and the connection point A failure detection signal of a fault current detection relay that is provided in each switch to detect a fault current flowing in each distribution section, information indicating how the distribution sections are connected to each other, and the breaker for the distribution line. Connection information indicating how the distribution sections are electrically connected to each other obtained from the on / off state signal and the switching state signal of each switch, load current information of each distribution line, and preset values. The unit load current information obtained through the remote monitoring control device or obtained through the remote monitoring control device, the specification information of each equipment that composes the distribution system, and the future load current change derived from past results or prediction are calculated in unit time. In the distribution system monitoring and control device that operates the distribution system using the load curve information expressed for each, input and hold the set value of the fault current detection relay of each circuit breaker acquired by the remote monitoring and control device A relay setting value setting information file to be monitored and the status information of the distribution system to be monitored and controlled via the remote monitoring and control device under the previously settled value monitoring condition, and for the distribution line according to a change in the system status. Setting value monitoring means for determining whether or not there is a mismatch between the relay setting value of the circuit breaker and the relay setting value of the switch; and Appropriate setting value calculation means for calculating a setting value of a corresponding fault current detection relay using the relay setting value setting information stored in the relay setting value setting information file so as to match the relay setting value setting information, Setting value setting means for setting and controlling the relay setting value calculated by the appropriate setting value calculation means to a fault current detection relay of the target switch via a remote monitoring control device.
[0010]
In addition, the invention of the distribution system monitoring and control device according to claim 2 is an ON / OFF state signal of the distribution line circuit breaker in the distribution system connected to the distribution line circuit breaker and divided into appropriate distribution sections by a division switch. And the switching state signal of the section switch, the switching state signal of the switch located at the link point of the distribution line, and the distribution line breaker, each section switch and the switch located at the link point, respectively. A fault detection signal of a fault current detection relay that detects a fault current flowing through each distribution section, information indicating how the distribution sections are connected to each other, and an ON / OFF state signal of the circuit breaker for the distribution line, and Connection information indicating how the distribution sections obtained from the switching state signals of the respective switches are electrically connected to each other, load current information of each distribution line, and whether they are preset or Section load current information obtained through the monitoring and control device, the specification information of each equipment constituting the distribution system, and the change of the future load current derived from past results or forecasts are expressed per unit time. In a distribution system monitoring and control device that operates the distribution system using load curve information, a relay setting value that inputs and holds the setting value of the fault current detection relay for each distribution line breaker obtained by the remote monitoring and control device When an extension or change of equipment due to extension or change of the distribution system to be monitored and controlled is detected via the setting information file and the remote monitoring control device, the relay setting value of the switch in the monitoring and control target system is reset. Equipment change content determination means for determining whether or not setting is necessary under conditions predetermined or arbitrarily set by an operator. If the setting is determined to be necessary, the setting value of the corresponding fault current detection relay is matched with the relay setting value setting information using the relay setting value setting information stored in the relay setting value setting information file. A suitable set value calculating means for calculating the relay set value calculated by the appropriate set value calculating means, a set value setting means for setting and controlling the fault current detection relay of the target switch via the remote monitoring control device, It is characterized by having.
[0011]
Further, the invention of the distribution system monitoring and control device according to claim 4 is based on how the respective distribution sections of the distribution system that are connected to the distribution line breaker and divided into appropriate distribution sections by the division switch are connected to each other. Information indicating whether the distribution sections are electrically connected to each other, and information about how the distribution sections are electrically connected to each other, and the load on each distribution line. Fault current calculation for an arbitrary system fault using current information, section load current information set in advance or obtained through a remote monitoring control device, and specification information of each equipment constituting a distribution system. Fault current calculating means for performing, fault information setting means for setting the fault information of the arbitrary system, time period setting means for setting the time or cycle to execute the fault current calculating means A proper setting value calculation means for calculating a proper setting value of a fault current detection relay provided in the distribution line breaker and the switch from the fault current value calculated by the fault current calculation means, I do.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the same elements and functions are denoted by the same reference numerals or related reference numerals throughout the drawings of the embodiments, and descriptions thereof will be omitted.
[0013]
(First Embodiment)
FIG. 1 is a configuration diagram showing a first embodiment of a distribution system monitoring and control device according to the present invention.
In FIG. 1, DA and DB are distribution systems connected to a substation bus (not shown) by distribution line breakers FCB-A and FCB-B, and one distribution system DA is a segment switch SW-A, SW-. B and SW-C are divided into a plurality of distribution sections DA1, DA2, DA3 and DA4, and the other distribution system DB is divided into distribution sections DB1 and DB2 by a division switch SW-E. The terminal sections DA4 and DB2 of the distribution systems DA and DB are linked and connected by a sectional switch SW-D. This terminal connection is referred to as a link point.
[0014]
At the time of operation of the illustrated distribution system, the sectional switch SW-D at the link point (black circle) is set to normally open, and the other white switch is marked normally closed. Therefore, power is supplied to the distribution sections DA1, DA2, DA3, and DA4 through the distribution line breaker FCB-A, while power is supplied to the distribution sections DB1 and DB2 through the distribution line breaker FCB-B. .
[0015]
In addition, each of the circuit breakers FCB-A and FCB-B for distribution lines and each of the sectional switches SW-A, SW-B, SW-C, SW-D and SW-E are provided with a fault current detection relay Ry-FA, respectively. It is equipped with Ry-FB, Ry-A, Ry-B to Ry-E.
[0016]
Reference numeral 102 denotes a remote monitoring and control device, which is a switch-on / off state signal of the circuit breakers FCB-A and FCB-B, and a switch SW-A, SW-B, SW-C, SW-D, and SW-E. While monitoring input information such as switching status signal, section load current of each distribution line, and fault current detection relays Ry-FA, Ry-FB equipped on circuit breakers FCB-A and FCB-B, A function to pass the load current information of each section and the relay set value to the distribution system monitoring and control device 101 described later, and conversely, pass the relay set value setting information from the distribution system monitoring and control device 101 described later to each of the fault current detection relays. I do.
[0017]
The power distribution system monitoring and control device 101 includes a plurality of information files for storing various information in addition to various function realizing means constituted by digital arithmetic devices such as electronic computers. This function realizing means is a distribution system created from the on / off state signal of the distribution line breaker, the on / off state signal of each switch, and the on / off signal and the switch state signal obtained through the remote monitoring control device 102. The connection information of each section, the load current information of each section of the distribution line, the information of each of the fault current detection relays, and various kinds of preset information are used to monitor each of the circuit breakers and each switch for the distribution line, and the monitoring result On the basis of the above, the controller performs a set value control on the fault current detection relays Ry-A, Ry-B to Ry-E via the remote monitoring control device 102.
[0018]
Hereinafter, the distribution system monitoring and control device 101 will be described in detail. The distribution system monitoring and control apparatus 101 includes relay setting value setting information file 105, load current information file 108, section load current information file 109, load curve information file 603, connection information file 110, Various information files such as the original information file 111 are provided.
[0019]
Here, the relay setting value setting information file 105 stores the fault current detection relays Ry-FA and Ry-FB of the circuit breakers FCB-A and FCB-B obtained through the remote monitoring control device 102. The load current information file 108 is a file for storing the set values, and is a file for storing the load current value of each distribution line.
[0020]
In addition, the section load current information file 109 is a file that stores the load current information of each section of the distribution line that is set in advance or obtained through the remote monitoring control device 102, and the load curve information file 603 is a file in the past. It is a file for storing information representing, for each unit time, a future change in load current derived from actual results or forecasts. The specification information file 111 is specification information such as the rated value of each equipment constituting the distribution system. Is a file that stores
[0021]
Further, the connection information file 110 is information indicating how the distribution sections are connected to each other, and the distribution sections obtained from the ON / OFF state signal of the distribution line circuit breaker and the switching state signal of the switch are electrically connected to each other. This file stores connection information indicating how the connection is established.
[0022]
On the other hand, the distribution system monitoring and control device 101 includes function realizing means such as a settling value monitoring means 107, an appropriate settling value calculating means 104, and a setting value setting means 103 as various function realizing means.
[0023]
Here, the settling value monitoring means 107 monitors a change in the state of the distribution system to be monitored and controlled at a cycle or an operating condition determined by the settling value monitoring condition 106, and changes in the system state causes the breaker of the distribution line breaker to change. It is determined whether or not a mismatch occurs between the relay setting value and the switch setting value.
[0024]
The appropriate set value calculating means 104 calculates the set values of the fault current detection relays Ry-A, Ry-B to Ry-E output from the set value monitoring means 107 and the relay set value set in the file 105. And confirming whether or not the protection coordination between the two has been achieved, that is, confirming whether the output of the settling value monitoring means 107 and the storage content of the relay settling value setting information file 105 have the same value, If the value is the same, the set value is output as it is. If the value is not the same, the set value is calculated and output so that the relay set value of the switch matches the relay set value of the circuit breaker.
[0025]
The set value setting means 103 outputs the relay set value output from the appropriate set value calculation means 104 to the remote monitoring control device 102, and is provided in the switch to be set with the set value from the remote monitoring control device 102. Control the setting of the fault current detection relay.
[0026]
FIG. 2 is a diagram showing an example of the configuration of the load current information file 108. The distribution lines DA, DB, and DC connected to the distribution line breakers FCB-A, FCB-B, FCB-C,. ... The value of the load current flowing through Dn is stored. FIG. 3 is a diagram showing an example of the configuration of the section load current information file 109. In FIG. 3, section load current information flowing through each distribution line DA1, DA2, DA3... DAn of the distribution system DA connected to the FCB-A is shown. Stored. FIG. 4 is a diagram showing an example of the configuration of a file for storing specification information. The rating values and the like are provided for each equipment (distribution line breaker FCB, section switch SW, section...) Constituting the distribution system. For example, in the case of the distribution line breaker FCB, the connection method, frequency, voltage,..., In the case of the segmented switch SW, the capacity, and in each distribution section, the path length, impedance, cross-sectional area. ... are stored respectively.
[0027]
FIG. 6 is a diagram showing an example of the configuration of the load curve information file 603. Each distribution line DA, DB..., Dn, and each section DA1, DA2. 00,... 23:00), a future load current value derived from past results or prediction is stored.
[0028]
Next, the operation of the distribution system monitoring and control device 101 configured as described above will be described. The set value monitoring means 107 in which the operation condition is defined by the set value monitoring condition 106 monitors the status information of the power distribution system which is the monitoring control target acquired by the remote monitoring control device 102. Here, the status information of the distribution system includes the on / off status information, the operation status information, and the abnormal status of the distribution system component equipment (distribution line breaker, switch, each section, etc.) input via the remote monitoring control device 102. The information includes the state information, the contents of setting the equipment information in the power distribution system monitoring and control apparatus 101 based on the communication from the operator, and the relay set values.
[0029]
The setting value monitoring means 107 determines whether a change in the system state input via the remote monitoring control device 102 causes a mismatch in the relay setting value of the distribution system due to the change.
[0030]
As shown in FIG. 1, initially, the link point between the distribution systems DA and DB was the partitioning switch SW-D, but the link point was changed due to a change in the distribution system state due to system operation or a change in the distribution system state without system operation. Is changed from the section switch SW-D to the section switch SW-B, the assignment of the section switch SW-C is changed from the original distribution line breaker FCB-A side to the FCB-B side.
[0031]
The setting value monitoring means 107, when the classification switch is changed, determines whether the setting value of the fault current detection relay of the distribution line breaker FCB-A and the setting value of the fault current detection relay of the FCB-B are different. If they are different from each other, it is determined that inconsistency occurs in the relay set value, and the appropriate set value calculating means 104 is notified that the set value needs to be updated. For example, it is assumed that the setting value of the FCB-A side distribution line is set to 30 [A], and the setting value of the FCB-B side distribution line is set to 35 [A]. As described above, when the assignment of the segment switch SW-C changes from the original distribution line breaker FCB-A side to the FCB-B side, the fault current detection provided in the segment switch SW-C is detected. The set value of the relay is in the state of 30 [A] where it should be switched to 35 [A].
Then, the set value monitoring means 107 outputs the content that the set value of the fault current detection relay of the segment switch SW-C is 30 [A].
[0032]
The appropriate set value calculating means 104 receives the output of the set value monitoring means 107, compares the input information with the information stored in the relay set value setting information file 105, and outputs The relay setting value of 35 [A] is calculated and output based on the information stored in the corresponding relay setting value setting information file 105.
[0033]
The set value setting means 103 receives the calculation result of the appropriate set value calculation means 104, and sets the set value of the fault current detection relay provided in the corresponding segment switch SW-C via the remote monitoring control device 102 to 35 [ A] is set and controlled to an appropriate value.
[0034]
As described above, according to the first embodiment, even if a change occurs in the power distribution system and the set value of the fault current detection relay provided in the segment switch changes after the change, the change quickly occurs. Since the reset value can be reset to a value that matches the fault current detection relay mounted on the distribution circuit breaker on the distribution system side, protection coordination between fault current detection relays can be achieved even after the distribution system changes State can be maintained. In this way, the protection coordination between the fault current detection relays can always be taken, so that there is a mismatch such that the fault current detection relay mounted on the sectional switch does not detect the fault current even though the distribution line breaker is shut off. The situation can be prevented, and an error in the failure point determination can be prevented.
[0035]
(Second embodiment)
FIG. 6 is a configuration diagram showing a second embodiment of the distribution system monitoring and control device according to the present invention. In this embodiment, as shown in FIG. 6, a part of the functions of the first embodiment is changed, and the first embodiment remotely monitors the information of the relay set value setting information file 105. In contrast to the fact that information from the actual distribution system is taken in via the control device 102, in the case of the present embodiment, a new set value input means 202 is provided in the distribution system monitoring and control device 201, and this set value input means 202 is provided. It is configured to take in the set value from.
[0036]
The setting value input means 202 is provided for each distribution system, for each of the distribution control circuit breakers FCB-A and FCB-B, and for the switchgears SW-A, SW-B, SW-C, SW-D, The set values of the fault current detection relays Ry-FA and Ry-FB, Ry-A, Ry-B to Ry-E respectively provided in the SW-E are input to and set in the respective distribution section units DA1 to DA4, DB2. Is configured.
The other parts are the same as those in the first embodiment, and a description thereof will be omitted.
[0037]
Next, the operation of the present embodiment will be described.
The set value input means 202 is provided with a fault current detection relay Ry provided in each of the circuit breakers FCB-A, FCB-B, and the sectional switches SW-A, SW-B to SW-E in the monitoring and control target system. -Set values of FA, Ry-FB, Ry-A, Ry-B to Ry-E are inputted and set for each distribution section, and the set information is stored in the relay set value setting information file 105.
[0038]
The other operation, that is, the settling value monitoring means 107 monitors the state of the power distribution system, predicts the occurrence of inconsistency in the relay setting value, notifies the appropriate setting value calculating means 104, and notifies the appropriate device of the relay setting value. Is reset as described in the first embodiment, and a description thereof will be omitted.
[0039]
As described above, according to the second embodiment, even if a change occurs in the distribution system, the distribution circuit breaker belonging to the changed distribution system and the fault current detection relay of each of the sectional switches are provided with: Since it is possible to quickly reset the set values to match each other, it is possible to maintain a state in which protection coordination between the fault current detection relays is taken.
[0040]
In this way, the relay protection protection is always coordinated, so that the fault current detection relay of one section switch detects fault current while the fault current detection relay of another section switch detects fault current. It is possible to prevent a situation in which a mismatch does not occur, and it is possible to prevent an erroneous determination of a failure point.
[0041]
Further, the operator can arbitrarily set the relay set value to be reset via the set value input means 202 according to the operation situation, so that the accuracy of failure detection can be finely adjusted.
[0042]
(Third embodiment)
FIG. 7 is a configuration diagram showing a third embodiment of the distribution system monitoring and control device according to the present invention. As shown in FIG. 7, the distribution system monitoring and control apparatus 301 according to the present embodiment replaces the set value monitoring condition 106 and the set value monitoring means 107 shown in FIG. Is newly provided. Other details are the same as those in FIG.
[0043]
The distribution system monitoring and control apparatus 301 according to the present embodiment, when the equipment constituting the distribution system is added or changed due to expansion or change of the distribution system, etc. Equipment change content determination means 302 for determining whether the reset value of the installed fault current detection relay needs to be reset based on predetermined conditions or conditions arbitrarily set by an operator; It is configured to include a facility change content determination condition 303 that defines a condition under which the determination unit 302 operates.
[0044]
The equipment change content determination condition 303 is the equipment change content determination means 302, which is for adding or changing the equipment constituting the power distribution system that requires resetting the relay setting value of the switch in the monitoring control target system. Is defined as a condition under which the operation of.
[0045]
The equipment change content determination unit 302 is configured to extend the distribution system to be monitored and controlled based on on / off information input via the remote monitoring control device 102 and the operating conditions defined by the equipment change content determination condition 303. Monitors the addition or change of equipment (segmented switches) that make up the distribution system due to changes or changes.
[0046]
As shown in FIG. 7, the segmented switch SW-D was initially a link between the distribution systems DA and DB, but if the link point subsequently changes from the switch SW-D to the switch SW-B, it is included in the change range. The power supply distribution line to the switch SW-C is changed from DA to DB.
[0047]
The equipment change content determination means 302 determines that the setting values of the fault current detection relays Ry-FA and Ry-FB of the distribution line breaker FCB-A before the change and the distribution line breaker FCB-B after the change are different from each other. It is determined that resetting of the relay settling value is necessary because there is a possibility of inconsistency in the settling state of the fault current detection relay, and the result is sent to the appropriate settling value calculating means 104 to update the settling value. Notify that is required.
[0048]
The equipment change content determining means 302 resets the set value of the fault current detection relay if the change of the equipment does not affect the relay set value, such as replacement of the switch SW-E. Is determined to be unnecessary, but if it is determined that the relay setting value needs to be reset due to a change in the equipment, the appropriate setting value calculation means 104 is notified that the setting value needs to be updated.
[0049]
The proper setting value calculating means 104 calculates a relay setting value based on the corresponding relay setting value setting information 105 for the SW-C which needs to calculate the setting value in response to the notification from the proper setting value calculating means 104. And output.
The set value setting unit 103 sets and controls the set value of the fault current detection relay RyC provided in the switch SW-C based on the calculation result of the equipment change content determination unit 302.
[0050]
As described above, according to the third embodiment, even if the distribution system is expanded or changed, the fault current detection relays provided in all the section switches belonging to the distribution system can immediately operate the fault current detection relay. Since the set value can be set to a value that matches the fault current detection relay provided in the circuit breaker for distribution of electric wires, a state in which protection coordination between the fault current detection relays can be maintained.
[0051]
In this way, the protection coordination between the fault current detection relays is always taken, so that even if the distribution line breaker shuts down, the switch does not detect the fault current, which prevents inconsistency. Therefore, it is possible to prevent the failure point determination error.
[0052]
(Fourth embodiment)
FIG. 8 is a configuration diagram showing a fourth embodiment of the distribution system monitoring and control device according to the present invention. The distribution system monitoring and control device 401 according to the fourth embodiment is configured by combining a part of the second embodiment and a part of the third embodiment.
[0053]
That is, the setting value input means 202 of the distribution system monitoring and control apparatus 401 according to the present embodiment and the relay setting value setting information 105 for storing the setting value input by the setting value input means 202 are the same as those of the second embodiment. This is the same as the setting value input means 202 and the relay setting value setting information 105 described above. Also, when the facility change content determining means 302 adds or changes the equipment constituting the distribution system due to expansion or change of the distribution system, the relay setting value of the switch in the system to be monitored and controlled by the addition or change is added. The method of determining whether to reset the relay setting value, notifying the determination result to the appropriate setting value calculating unit 104, and resetting the relay setting value for the corresponding device is as described in the third embodiment. is there.
[0054]
As described above, according to the present embodiment, even if the distribution system is expanded or changed, a fault current detection relay provided in each of the distribution circuit breaker and each of the divided switches belonging to the changed distribution line is provided. Thus, it is possible to quickly reset the set value to the matched set value, and to maintain a state in which protection coordination between the fault current detection relays is taken.
[0055]
As a result, the fault current detection relay of one switch detects the fault current, while the fault current detection relay of another switch does not detect the fault current. It is possible to prevent a failure point determination error.
[0056]
Further, the operator can arbitrarily set the relay set value to be reset by the set value input means according to the operation situation, so that the accuracy of failure detection can be finely adjusted.
[0057]
(Fifth embodiment)
FIG. 9 is a configuration diagram showing a fifth embodiment of the distribution system monitoring and control device according to the present invention.
In the present embodiment, the fault current detection relay set value of the switch can be set and controlled according to the state of the current flowing through the distribution system. For this purpose, the distribution system monitoring and control apparatus 501 according to the present embodiment includes a fault current calculation means 503 and a fault information setting means 504 in place of the set value monitoring means 107 and the set value monitoring condition 106, and further includes a fault current calculation means There is provided a time period setting unit 502 for setting a time or a period at which the operation 503 is executed. Further, the fault current calculation means 503 is configured to input respective storage information from the load current information file 108, the section load current file 109, the connection information file 110, and the specification information file 111.
[0058]
In the above configuration, the distribution system monitoring and control device 501 monitors the on / off state of the distribution line circuit breaker FCB-A and the open / closed state of the switches SW-A to SW-D by the remote monitoring and control device 102. Based on the monitoring result, connection information indicating how the distribution sections are connected to each other is created and stored in the file 110.
[0059]
The fault current calculation means 503 determines the contents of the supposed fault (failure mode such as one-line ground fault, three-phase short-circuit, line-to-line short-circuit, etc.) and the fault at the time or cycle set by the time cycle setting means 502. A fault current value is calculated by a fault current calculation method using the (point), the connection information 110, the load current information 108, the section load current information 109, and the specification information 111.
[0060]
The proper setting value calculating means 104 obtains a setting value of the fault current detection relay to be set from the fault current value calculated by the fault current calculating means 503. The set value of the fault current detection relay obtained by the appropriate set value calculating means 104 is notified to the set value setting means 103. The setting value setting means 103 receives this notification and sets and controls the fault current detection relay setting value to an appropriate setting value via the remote monitoring control device 102.
[0061]
As described above, according to the fifth embodiment, it is possible to set and control the relay setting value according to the state of the power flowing through the distribution system to the fault current detection relay. As a result, the fault current can be accurately detected, and the fault location can be accurately determined.
[0062]
(Sixth embodiment)
FIG. 10 is a configuration diagram showing a sixth embodiment of the distribution system monitoring and control device according to the present invention. The distribution system monitoring and control apparatus 601 according to the present embodiment is different from the fifth embodiment (FIG. 9) in that a load curve representing a change in a future load current derived from past results or prediction per unit time. Information 603 and load prediction means 602 for predicting load current information 108 'and section load current information 109' at an arbitrary time in the future from the load curve information 603 are added.
[0063]
The distribution system monitoring and control device 601 monitors the on / off state of the distribution line circuit breaker and the open / closed state of the switch by the remote monitoring and control device 102, and based on the results, indicates the connection between the distribution sections. The creation of the information 110 is the same as the embodiment described above.
[0064]
The load prediction unit 602 predicts load current information and section load current information at an arbitrary time in the future from the load curve information stored in the load curve information file 603. Reference numeral 108 'denotes a load current information file, and 109' denotes a section load current information file. As shown in FIG. 5, an example of the load curve information 603 indicates that each of the distribution lines DA, DB,..., Dn and each of the divided sections DA1, DA2,. ,... 23:00), a future load current value derived from past results or prediction is stored.
[0065]
The failure information setting means 504 sets the assumed failure contents (failure aspects such as one-line ground fault, three-phase short-circuit, and line-to-line short-circuit and a failure point), and the fault current calculation means 503 sets by the time period setting means 502. Execute the fault current calculation at the specified time or cycle.
[0066]
At this time, the fault current calculation means 503 determines the contents of the assumed fault set by the fault information setting means 504 at an arbitrary time or an arbitrary cycle set by the time cycle setting means 502 and the information stored in the connection information file 110. The information stored in the load current information file 108 'at any future time predicted by the load prediction means 602, the information stored in the section load current information file 109', and the information stored in the specification information file 111. The fault current value is calculated using the information thus obtained.
[0067]
The proper setting value calculation means 104 obtains a setting value of the fault current detection relay to be set from the fault current value calculated by the fault current calculation means 503. The set value of the fault current detection relay obtained by the appropriate set value calculating means 104 is notified to the set value setting means 103. The setting value setting means 103 controls the fault current detection relay setting value to an appropriate setting value via the remote monitoring control device 102.
[0068]
As described above, according to the sixth embodiment, it is possible to grasp the relay setting value according to the state of the power flowing through the distribution system at an arbitrary time in the future, and without delay in the transition of the power state, The set value of the fault current detection relay can be set and controlled to an appropriate value. As a result, the fault current can be accurately detected, and the fault location can be accurately determined.
[0069]
(Seventh embodiment)
FIG. 11 is a configuration diagram showing a seventh embodiment of the distribution system monitoring and control device according to the present invention. As shown in the configuration diagram of FIG. 11, the distribution system monitoring and control device 701 according to the present embodiment includes a single function of the distribution system monitoring and control device according to the first to sixth embodiments, that is, various functions. A function killing means 702 is newly provided so as to include all the function realizing means and various information files and to select and realize any desired function from the plurality of functions.
[0070]
That is, the distribution system monitoring and control device 701 includes the distribution system monitoring and control device 101 according to the first embodiment, the distribution system monitoring and control device 201 according to the second embodiment,... The power distribution according to the sixth embodiment. In order to realize the function of the system monitoring control device 601, the remote monitoring control device 102, various units 103 to 107, 202, 302, 303, 502 to 504, 702, 703, 602, 603 and information 108 ′ to 111 are all provided. ing. The function killing means 702 can select and realize a function of any one of the embodiments or a function of a combination of two or more embodiments.
[0071]
As described above, according to the seventh embodiment, one device has all the functions of the power distribution system monitoring and control device according to the first to sixth embodiments, and a function killing means. The function 702 allows the user to select any of these functions as needed, so that the fault current detection relay can be used properly according to the operation method of the distribution system or the characteristics of each fault current detection relay. It can be.
[0072]
【The invention's effect】
As described above, according to the present invention, even if the distribution system changes due to system operation, expansion or change, or even if the current flowing in the distribution system changes due to a change in power demand, after the change, Even if the setting value of the fault current detection relay installed in the segment switch changes, the setting value is immediately reset to the setting value that matches the fault current detection relay installed in the distribution circuit breaker on the distribution system side after the change However, since the protection coordination is always performed between the fault current detection relays, there is an inconsistency that the fault current detection relay provided in the sectional switch does not detect the fault current even though the distribution line breaker has shut down. Can be prevented, and an erroneous determination of a failure point can be prevented.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a first embodiment of a distribution system monitoring and control device according to the present invention.
FIG. 2 is a diagram showing a configuration of a load current information file according to the first embodiment.
FIG. 3 is a diagram showing a configuration of a section load current information file according to the first embodiment.
FIG. 4 is a diagram showing a configuration of a specification information file according to the first embodiment.
FIG. 5 is a diagram showing a configuration of a load curve information file according to the first embodiment.
FIG. 6 is a configuration diagram showing a second embodiment of the distribution system monitoring and control device according to the present invention.
FIG. 7 is a configuration diagram showing a third embodiment of the distribution system monitoring and control device according to the present invention.
FIG. 8 is a configuration diagram showing a fourth embodiment of the distribution system monitoring and control device according to the present invention.
FIG. 9 is a configuration diagram showing a fifth embodiment of the distribution system monitoring and control device according to the present invention.
FIG. 10 is a configuration diagram showing a sixth embodiment of the distribution system monitoring and control device according to the present invention.
FIG. 11 is a configuration diagram illustrating a power distribution system monitoring and control apparatus according to a seventh embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 101 ... Distribution system monitoring and control apparatus, 102 ... Remote monitoring control apparatus, 103 ... Setting value setting means, 104 ... Appropriate setting value calculating means, 105 ... Relay setting value setting information, 106 ... Setting value monitoring condition, 107 ... Setting value monitoring Means, 108, 108 ': load current information, 109, 109': section load current information, 110: connection information, 111: specification information, 201: distribution system monitoring and control device, 202: set value input means, 301: power distribution System monitoring and control device, 302: facility change content determination means, 303: facility change content determination condition, 401: distribution system monitoring and control device, 501: distribution system monitoring and control device, 502: time cycle setting means, 503: fault current calculation means 504: failure information setting means, 601: distribution system monitoring and control device, 602: load prediction means, 603: load curve information, 701: distribution system monitoring Visual control device, 702: Function killing means, FCB-A, FCB-B: Circuit breaker for distribution line, SW-A to SW-E: Switch, DA, DB: Distribution system, DA1 to DB2: Distribution section, Ry -FA, Ry-FB, Ry-A to Ry-E: Fault current detection relays.

Claims

Linkage between the on / off state signal of the distribution line breaker, the on / off state signal of the divided switch, and the distribution line in the distribution system connected to the distribution line circuit breaker and divided into appropriate distribution sections by the divisional switch. Switching status signal of a switch located at a point, and a fault current detection relay that is provided in each of the circuit breaker for the distribution line, each segmented switch and the switch located at a link point, and detects a fault current flowing in each distribution section. The failure detection signal, the information indicating how the distribution sections are connected to each other, and the distribution section obtained from the ON / OFF state signal of the distribution line circuit breaker and the switching state signal of each switch are electrically connected. Connection information indicating how the connection is made, load current information of each distribution line, and section load current information that is set in advance or obtained through the remote monitoring control device. A power distribution system that operates the power distribution system by using the specification information of each equipment that composes the power distribution system and the load curve information that indicates the change of the load current in the future per unit time derived from past performance or prediction In the monitoring control device,
A relay setting value setting information file that inputs and holds the setting value of the fault current detection relay of each distribution line breaker obtained by the remote monitoring control device,
Under the settling value monitoring conditions defined in advance, the status information of the distribution system to be monitored and monitored is monitored via the remote monitoring control device. Setting value monitoring means for determining whether there is a mismatch with the relay set value,
When the settling value monitoring means determines that there is an inconsistency, the setting value of the corresponding fault current detection relay is set using the relay settling value setting information stored in the relay setting value setting information file. An appropriate setting value calculating means for calculating so as to match the information;
A setting value setting means for setting and controlling the relay setting value calculated by the appropriate setting value calculation means to a fault current detection relay of the target switch via the remote monitoring control device,
A distribution system monitoring and control device, comprising:

Linkage between the on / off state signal of the distribution line breaker, the on / off state signal of the divided switch, and the distribution line in the distribution system connected to the distribution line circuit breaker and divided into appropriate distribution sections by the divisional switch. Switching status signal of a switch located at a point, and a fault current detection relay that is provided in each of the circuit breaker for the distribution line, each segmented switch and the switch located at a link point, and detects a fault current flowing in each distribution section. The failure detection signal, the information indicating how the distribution sections are connected to each other, and the distribution section obtained from the ON / OFF state signal of the distribution line circuit breaker and the switching state signal of each switch are electrically connected. Connection information indicating how the connection is made, load current information of each distribution line, and section load current information that is set in advance or obtained through the remote monitoring control device. A power distribution system that operates the power distribution system by using the specification information of each equipment that composes the power distribution system and the load curve information that indicates the change of the load current in the future per unit time derived from past performance or prediction In the monitoring control device,
A relay setting value setting information file that inputs and holds the setting value of the fault current detection relay of each distribution line breaker obtained by the remote monitoring control device,
If the addition or change of equipment due to the expansion or change of the monitored and controlled distribution system is detected via the remote monitoring and control device, it is necessary to reset the relay setting of the switch in the monitored and controlled system. The equipment change content determination means for determining whether or not under predetermined conditions or arbitrarily set by the operator,
If it is determined by the equipment change content determination means that resetting of the relay setting value is necessary, the setting value of the corresponding fault current detection relay is set using the relay setting value setting information stored in the relay setting value setting information file. A suitable set value calculating means for calculating the relay set value to match the relay set value setting information,
A setting value setting means for setting and controlling the relay setting value calculated by the appropriate setting value calculation means to a fault current detection relay of the target switch via the remote monitoring control device,
A distribution system monitoring and control device, comprising:

The setting value of the fault current detection relay of each distribution line breaker stored in the relay setting value setting information file is input by setting value input means instead of being obtained and input by the remote monitoring control device. The distribution system monitoring and control device according to claim 1 or 2, wherein:

Information indicating how each distribution section of the distribution system is connected to the distribution line breaker and divided into appropriate distribution sections by the section switch, and how the distribution line breaker is turned on and off, and Connection information indicating how the distribution sections are electrically connected to each other obtained from the switching state signal of the switch, load current information of each distribution line, and a preset or remote monitoring control device. Fault current calculating means for calculating a fault current for an arbitrary system fault using the section load current information obtained in step S1 and the specification information of each equipment constituting the power distribution system; and Fault information setting means for setting, time cycle setting means for setting the time or cycle for executing the fault current calculation means, and the fault current value calculated by the fault current calculation means. Distribution system monitoring and control device characterized by having a proper setting value calculating means for calculating an appropriate set value of the fault current detection relay that has been installed on the circuit breaker and switch wires, the.

Load curve information that represents, for each unit time, the change in future load current derived from past results or predictions, and based on this load curve information, the load current information of each distribution line at any future time and future 6. The power distribution system monitoring and control device according to claim 5, further comprising a load prediction unit that predicts the section load current information at the time.

A file for storing various information according to claim 1 to claim 5 and a function realizing means are all provided, and a relay setting value setting function killing means for individually killing any appropriate setting value calculating means is provided. The power distribution system monitoring and control device according to claim 1, wherein: