JP4412865B2

JP4412865B2 - Transmission power control method and transmission power control system

Info

Publication number: JP4412865B2
Application number: JP2001199675A
Authority: JP
Inventors: 淳一横田; 進大川; 泰基久保田; 幹也石井
Original assignee: Osaka Gas Co Ltd
Current assignee: Osaka Gas Co Ltd
Priority date: 2001-03-28
Filing date: 2001-06-29
Publication date: 2010-02-10
Anticipated expiration: 2021-06-29
Also published as: JP2002359926A

Description

【０００１】
【発明の属する技術分野】
電力負荷へ送電線を介して送電する電力を発電する発電機の送電電力制御方法、及びその方法を適用した送電電力制御システムに関し、特に一般電気事業者が管理する送電線を用いた送電を行う場合に、電力負荷が消費する電力に一致させるべく発電機から送電する電力を制御する送電電力制御方法及び送電電力制御システムに関する。
【０００２】
【従来の技術】
電力の小売事業を行う特定規模電気事業者は、一般電気事業者である電力会社が管理する送電線を使用して、発電所に設置されている発電機が発電した電力を消費者が管理する電力負荷へ送電する。
そして発電所から送電する電力量が電力負荷にて消費される電力量より小さい場合、その不足分については電力会社から送電することで賄われ、大きい場合、過剰分については電力会社へ送電される。
【０００３】
発電所から送電する電力量及び電力負荷にて消費される電力量は３０分単位の積算値にて集計されており、その差が予め契約している±３％等の所定値内であれば、発電所から送電する電力が電力負荷にて消費されたものとして決済が行われる。
【０００４】
送電電力量及び消費電力量の差が所定値を外れた場合で、送電電力量が消費電力量より大きいとき、特定規模電気事業者は電力会社へ無料で送電したことになり、送電電力量が消費電力量より小さいとき、電力会社から割高な電力を購入することとなり、いずれにしても経済的な損失が生じる。
そのため発電所から送電する電力量は、電力負荷にて消費される電力量と一致するように制御されており、例えば５分等の所定の周期で消費電力の瞬時値を発電所へ送信し、発電所では受信した瞬時値に基づいて送電量を制御する。
【０００５】
【発明が解決しようとする課題】
しかしながら瞬時値による制御では、発電機の追従性、短時間での消費電力変動、及び消費電力と送電電力との計測誤差等の要因により、送電電力量及び消費電力量の差が生じ易いという問題があり、このことは経済的な損失に繋がるという問題がある。
【０００６】
本発明は斯かる事情に鑑みてなされたものであり、消費電力の瞬時値だけでなく、消費電力量の積算値及び送電電力量の積算値の差に基づいても送電電力を制御し、特に積算値の差を０にすべく消費電力の瞬時値を補正することで送電電力の制御目標値を決定することにより、送電電力量及び消費電力量の差を低減し、経済的な損失を防止する送電電力制御方法、及びその方法を適用した送電電力制御システムの提供を主たる目的とする。
即ち最新の消費電力の情報を得やすいという瞬時値に基づく制御の利点を生かしながらも、消費電力量及び送電電力量の偏差を小さくすることができるという積算値に基づく制御の利点をとりいれることにより、応答性及び精度共に優れた送電電力制御システムを構築する。
これにより瞬時値のみで制御した場合に生じる消費電力及び送電電力の計測誤差等の要因による送電電力量及び消費電力量の差の発生を抑えることも可能であり、さらに積算値のみで制御した場合に生じる積算値の蓄積不十分による制御遅れを要因とする送電電力量及び消費電力量の差の発生を抑えることも可能である。
【０００７】
また電力負荷から受け付けた消費電力の瞬時値を積算して、消費電力量の積算値を算出することにより、電力負荷から消費電力量の積算値が得られない場合でも、経済的な損失を防止する送電電力の制御を行うことが可能な送電電力制御方法及び送電電力制御システムの提供を他の目的とする。
【０００８】
【課題を解決するための手段】
第１発明に係る送電電力制御方法は、電力負荷へ送電する電力を発電する発電機の送電電力制御方法において、電力負荷が消費した所定期間の電力量の積算値及び発電機が送電した前記所定期間の電力量の積算値の差を示す偏差積算値を算出し、算出した偏差積算値を微分した微分値を求め、電力負荷が消費した消費電力の瞬時値及び偏差積算値の微分値に基づき送電電力の目標値を決定し、決定した目標値に近付けるべく送電電力を制御することを特徴とする。
【０００９】
本発明に係る送電電力制御方法では、消費電力に係る瞬時値及び偏差積算値に基づいて決定した目標値に近付けるべく送電電力を制御することにより、短時間での消費電力変動等の要因により、送電電力量及び消費電力量の差を低減し、経済的な損失を防止することが可能である。しかも、瞬時値に基づいて目標値を決定している従来のシステムに、偏差積算値を微分した微分値を加減算して目標値を決定する処理を加えるだけでよいので、従来のシステムに簡単な改造を行うだけで、経済的な損失を防止するシステムを実現することが可能である。
【００１０】
第２発明に係る送電電力制御システムは、電力負荷へ送電線を介して送電する電力を発電する発電機の送電電力制御システムにおいて、電力負荷が消費した消費電力の瞬時値を受け付ける手段と、電力負荷が消費した所定期間の電力量を示す消費電力積算値を受け付ける積算値受付手段と、発電機が送電した前記所定期間の電力量を示す送電電力積算値を受け付ける手段と、受け付けた消費電力積算値及び送電電力積算値の差を示す偏差積算値を算出する手段と、算出した偏差積算値を微分した微分値を求める手段と、受け付けた瞬時値及び求めた微分値に基づいて送電電力の目標値を決定する決定手段と、該決定手段が決定した目標値に基づいて送電電力を制御する手段とを備えることを特徴とする。
【００１１】
本発明に係る送電電力制御システムでは、消費電力に係る瞬時値及び偏差積算値に基づき送電電力の目標値を決定して制御することにより、短時間での消費電力変動等の要因による送電電力量及び消費電力量の差を低減し、しかも電力会社との決済単位である３０分より短い５分等の周期にて偏差積算値を算出するように処理を行えば、補正のために発電機の出力を急激に変動させることなく、また決済単位を計時する時計にずれが生じている場合でも、送電電力量及び消費電力量の差を低減し、経済的な損失を防止することが可能である。しかも、瞬時値に基づいて目標値を決定している従来のシステムに、偏差積算値を微分した微分値を加減算して目標値を決定する処理を加えるだけでよいので、従来のシステムに簡単な改造を行うだけで、経済的な損失を防止するシステムを実現することが可能である。
【００１４】
第３発明に係る送電電力制御システムは、第２発明において、受け付けた消費電力の瞬時値を積分して消費電力積算値を算出する積算値算出手段を備え、前記積算値受付手段は、前記積算値算出手段が算出した消費電力積算値を受け付けるべくなしてあることを特徴とする。
【００１５】
本発明に係る送電電力制御システムでは、受け付けた瞬時値から消費電力積算値を算出することにより、電力負荷から消費電力積算値が得られないシステムにおいても、送電電力量及び消費電力量の差を低減し、経済的な損失を防止することが可能である。
【００１６】
第４発明に係る送電電力制御システムは、第２発明又は第３発明において、前記送電線は、一般電気事業者が管理し、前記発電機は、特定規模電気事業者が管理し、前記発電機が発電した電力の送電は、前記一般電気事業者が管理する送電線を用いた託送であることを特徴とする。
【００１７】
本発明に係る送電電力制御システムでは、電力の託送に適用することで、送電電力量及び消費電力量の差を低減し、経済的な損失を防止することが可能である。
【００１８】
【発明の実施の形態】
以下、本発明のその実施の形態を示す図面に基づいて詳述する。
実施の形態１．
図１は本発明の実施の形態１における送電電力制御システムを概念的に示す説明図である。
図中１００は特定規模電気事業者が管理する発電設備であり、発電設備１００には発電機１０が設置されており、発電機１０にて発電された電力は、一般電気事業者である電力会社が管理する送電線２０を使用して、複数の消費者が夫々管理する消費設備３００，３００，…に設置された電力負荷３０，３０，…へ送電される。
【００１９】
発電機１０及び電力負荷３０，３０，…は通信機能を備えており、インターネット等の公衆通信網ＮＷに接続し、発電機１０にて発電した電力を消費者に小売りする特定規模電気事業者が管理する管理設備４００に設置された管理装置４０と通信を行い、管理装置４０では、各電力負荷３０，３０，…が消費した電力に関する情報を前記特定規模電気事業者又は発電事業者が管理する発電設備１００へ送信する。
【００２０】
さらに送電線２０には、電力会社が管理する図示しない外部発電機等の装置及び設備も接続されており、各電力負荷３０，３０，…が消費する電力を発電機１０にて賄えない場合は、電力会社から不足分の電力が送電され、また発電機１０から送電した電力が各電力負荷３０，３０，…にて消費される電力を超える場合は、過剰分の電力が電力会社へ送電される。
【００２１】
図２は本発明の実施の形態１における送電電力制御システムの構成を模式的に示すブロック図である。
発電設備１００は、発電機１０にて発電された電力を送電すべく送電線２０に接続する内部電線１１を備え、内部電線１１には送電した電力の瞬時値を測定する電力計１２及び所定期間に送電した電力量の積算値を測定する電力量計１３が配設されている。
【００２２】
電力計１２が測定した送電電力の瞬時値は、発電機１０から送電される送電電力を目標値に近付けるべく発電機１０を制御する送電電力一定制御を行う発電機制御盤１４、及び発電機１０の各種制御に用いられるＰＬＣ(Programmable Logic Controller) １５へ送られる。
また電力量計１３が測定した送電電力量の積算値はＰＬＣ１５へ送られる。
【００２３】
発電機制御盤１４及びＰＬＣ１５は、ネットワークコンピュータ１６により管理されるＬＡＮ(Local Area Network)等の内部通信網１７に接続しており、内部通信網１７に接続するハブ１８を介してＴＡ(Terminal Adapter)等の通信装置１９により、公衆通信網ＮＷに接続する。
そして外部と各種情報通信を行う。
【００２４】
消費設備３００は、発電機１０にて発電された電力を受電すべく送電線２０に接続する内部電線３１を備え、内部電線３１により受電した電力は消費電力として電力負荷３０へ送電される。
内部電線３１には消費電力の瞬時値を測定する電力計３２及び所定期間に消費した電力量の積算値を測定する電力量計３３が配設されており、電力計３２及び電力量計３３が測定した消費電力の瞬時値である消費電力及び積算値である消費電力量は、ＰＬＣ３４へ送られる。
【００２５】
ＰＬＣ３４はネットワークコンピュータ３５により管理されるＬＡＮ等の内部通信網３６に接続しており、内部通信網３６に接続するハブ３７を介してＴＡ等の通信装置３８により、公衆通信網ＮＷに接続する。
そして外部と各種情報通信を行う。
【００２６】
管理設備４００は、サーバコンピュータ等の各種コンピュータを用いた管理装置４０，４０，…が設置されており、管理装置４０，４０，…はＬＡＮ等の内部通信網４１に接続し、内部通信網４１に接続するハブ４２を介してＴＡ等の通信装置４３により、公衆通信網ＮＷに接続する。
そして外部と各種情報通信を行う。
【００２７】
図３は本発明の実施の形態１における送電電力制御システムの処理を示すブロック線図である。
各消費設備３００，３００，…に夫々設置された電力負荷３０，３０，…にて消費された電力を、夫々の電力計３２，３２，…により測定して得られた消費電力の瞬時値、及び各電力負荷３０，３０，…にて消費された所定期間の電力量を、夫々の電力量計３３，３３，…により測定して得られた消費電力量の積算値は、５分等の所定の周期で公衆通信網ＮＷを介して管理設備４００へ送られる。
【００２８】
管理設備４００では、各電力負荷３０，３０，…から送られた各消費電力の瞬時値を受け付け（ステップＳ１）、受け付けた瞬時値の総和を求め（ステップＳ２）、求めた瞬時値の総和を、送電損失等の減衰率を考慮した定数にて除す補正を行い（ステップＳ３）、更に消費電力の動向を予測する補正ロジックにて算出した補正値による補正を行い（ステップＳ４）、ステップＳ３及びＳ４による補正後の瞬時値の総和を給電指令として、公衆通信網ＮＷを介して発電設備１００へ送る。
【００２９】
また各電力負荷３０，３０，…から送られた消費電力量の積算値を受け付け（ステップＳ５）、受け付けた消費電力量の積算値の総和を求め（ステップＳ６）、求めた積算値の総和を、ステップＳ３にて用いた定数にて除す補正を行い（ステップＳ７）、ステップＳ６及びＳ７による補正後の積算値の総和を、公衆通信網ＮＷを介して発電設備１００へ送る。
【００３０】
発電設備１００では、発電機１０から送電した電力量の積算値を電力量計１３により測定して得られた送電電力量の積算値をＰＬＣ１５へ送り、ＰＬＣ１５で送電電力積算値として受け付け（ステップＳ８）、更に管理設備４００から送られた補正後の消費電力の総和を、消費電力積算値として受け付け（ステップＳ９）、ステップＳ８で受け付けた送電電力積算値及びステップＳ９で受け付けた消費電力積算値の差を偏差積算値として算出し（ステップＳ１０）、算出した偏差積算値を微分する（ステップＳ１１）。
ステップＳ１１の微分処理は、偏差積算値を所定値、例えば０に近付けるべく、変動を抑制する補正値を求めるための処理である。
【００３１】
そして管理設備４００から給電指令として瞬時値の総和を受け付け（ステップＳ１２）、受け付けた瞬時値の総和及びステップＳ１１にて微分した偏差積算値に基づいて、発電機１０の送電電力の目標値を決定し（ステップＳ１３）、決定した送電電力の目標値を送電指令として発電制御盤１４へ送り（ステップＳ１４）、発電機制御盤１４では受け付けた目標値に送電電力を近付けるべく発電機１０を制御する送電電力一定制御を行う（ステップＳ１５）。
なお発電機１０から送電する送電電力の瞬時値は、発電機制御盤１４へ送られ、フィードバック制御がなされる。
【００３２】
またステップＳ８、Ｓ１０、Ｓ１３、Ｓ１４、及びＳ１５については、公衆通信網ＮＷを介さずに行われる処理であるため、測定した送電電力積算値に基づく実時間に近い状態で高精度の制御を行うことができる。
【００３３】
そして送電電力積算値は、発電設備１００から公衆通信網ＮＷを介して管理設備４００へも送られ（ステップＳ１６）、管理設備４００では、発電設備１００から受け付けた送電電力積算値、並びにステップＳ６及びＳ７による補正後の積算値の総和により示される消費電力積算値の差を偏差積算値として算出し（ステップＳ１７）、算出した偏差積算値に基づいて、消費電力の動向を予測する補正ロジックにて補正値を算出し（ステップＳ１８）、算出した補正値をステップＳ４の補正に用いる。
【００３４】
次に本発明の実施の形態１における送電電力制御システムにて送電電力一定制御を行った場合の送電電力の変化を説明する。
図４は送電電力一定制御を行った場合の送電電力の変化を示すグラフであり、図４（ａ）が瞬時値のみで制御を行う従来の送電電力制御方法での変化を示し、図４（ｂ）が積算値を含めた制御を行う本発明の送電電力制御方法での変化を示している。
【００３５】
図４（ａ），（ｂ）のいずれも横軸に時間をとり、縦軸に電力をとってその関係を示したものであり、実線が送電電力一定制御の目標値を示し、点線が実績値として送電電力の瞬時値を示し、そして実線及び点線で囲まれた斜線の領域がその差を示している。
図４（ａ）では、瞬時値に基づいて送電制御を行っているため、発電機の追従性等の要因により、目標値と実績値との差が解消されない状態が継続し、図４（ａ）に示す例では送電電力が消費電力に対して小さい状態が継続している。
図４（ｂ）では、積算値を加味しているため、追従性等の要因により、送電電力が過小である状態の直後に送電電力を過剰にして、所定期間での電力量が一定になるように補正されている。
即ち、目標値を低い値から高くした場合、目標値が高くなった時点においては、実績値は、目標値より低い状態であり、そこから上昇して目標値を超えた後、目標値と一致する値まで下がり、目標値と一致した値で推移することにより、所定期間での電力量を示す目標値の積算値と実績値の積算値とは同値又は近似値を示す。
このことは図４（ｂ）において、目標値を低い値から高くした場合、実績値が目標値より低い時に目標値の下方に出現する目標値及び実績値の差異を示す実線及び点線で囲まれた斜線の領域と、実績値が目標値より高い時に目標値の上方に出現する斜線の領域とが当面積であることによっても示される。
なお目標値を高い値から低くした場合、実績値は目標値より高い状態から目標値より低くなった後、目標値と一致する。
【００３６】
実施の形態２．
実施の形態２は、実施の形態１において、管理設備４００から発電設備１００へ、瞬時値の総和を給電指令として送るが、積算値の総和は送らない形態であり、発電設備１００にて、受け付けた瞬時値を積算することにより、積算値の総和を代替する形態である。
なお実施の形態２における送電電力制御システムの構成は、実施の形態１と同様であるので、実施の形態１を参照するものとし、その説明を省略する。
【００３７】
図５は本発明の実施の形態２における送電電力制御システムの処理を示すブロック線図である。
実施の形態２では、実施の形態１のステップＳ９にて行われる消費電力積算値を管理設備４００から発電設備１００へ送り、発電設備１００にて受け付ける処理は行われず、ステップＳ１２にて受け付けた瞬時値の総和を積分し（ステップＳ１９）、得られた値を消費電力積算値として、ステップＳ８にて受け付けた送電電力積算値との差を偏差積算値として算出する（ステップＳ１０）。
なお実施の形態１と同様の処理については、実施の形態１と同一符号を付し、その説明を省略する。
【００３８】
前記実施の形態では、発電設備１００及び管理設備４００を公衆通信網ＮＷにて接続する形態を示したが、両設備を管理する事業体が同一の事業体である場合、内部通信網にて接続することで、高速な通信環境を実現し、より精度の高い制御を行うことも可能である。
【００３９】
また前記実施の形態では、電力負荷における消費電力の瞬時値及び積算値、又は瞬時値のみにおいて制御する形態を示したが、本発明はこれに限らず積算値のみを電力負荷から受信し、基準となる目標値に対して過不足を決定する処理により、送電目標値を決定して制御する形態でもよい。
【００４０】
さらに前記実施の形態では、消費電力積算値及び送電電力積算値の差を示す偏差積算値を０に近付けるべく、微分を行う形態を示したが、本発明はこれに限らず、偏差積算値を０に近付けることができれば、他の演算及び／又は制御を用いてもよい。
【００４１】
【発明の効果】
以上詳述した如く本発明に係る送電電力制御方法及び送電電力制御システムでは、消費電力量の積算値及び送電伝電力量の積算値の差を示す偏差積算値を所定値、例えば０に近付けるべく送電電力の目標値を決定して制御することにより、短時間での消費電力変動等の要因による送電電力量及び消費電力量の差を低減し、しかも電力会社との決済単位である３０分より短い５分等の周期にて偏差積算値を算出するように処理を行えば、補正のために発電機の出力を急激に変動させることなく、また決済単位を計時する時計にずれが生じている場合でも、送電電力量及び消費電力量の差を低減し、経済的な損失を防止することが可能である等、優れた効果を奏する。
【００４２】
また本発明では、消費電力の瞬時値から消費電力積算値を算出することにより、電力負荷から消費電力積算値が得られないシステムにおいても、送電電力量及び消費電力量の差を低減し、経済的な損失を防止することが可能である等、優れた効果を奏する。
【図面の簡単な説明】
【図１】本発明の実施の形態１における送電電力制御システムを概念的に示す説明図である。
【図２】本発明の実施の形態１における送電電力制御システムの構成を模式的に示すブロック図である。
【図３】本発明の実施の形態１における送電電力制御システムの処理を示すブロック線図である。
【図４】送電電力一定制御を行った場合の送電電力の変化を示すグラフである。
【図５】本発明の実施の形態２における送電電力制御システムの処理を示すブロック線図である。
【符号の説明】
１０発電機
１００発電設備
２０送電線
３０電力負荷
３００消費設備
４０管理装置
４００管理設備[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transmission power control method for a generator that generates power to be transmitted to a power load via a transmission line, and a transmission power control system to which the method is applied, and in particular, performs transmission using a transmission line managed by a general electric utility. In this case, the present invention relates to a transmission power control method and a transmission power control system for controlling power transmitted from a generator to match power consumed by a power load.
[0002]
[Prior art]
A specific-scale electric power company that conducts electricity retail business uses a transmission line managed by a power company that is a general electric power company, and the consumer manages the power generated by the generator installed at the power plant. Transmit power to the load.
If the amount of power transmitted from the power plant is smaller than the amount of power consumed by the power load, the shortage is covered by power transmission from the power company, and if large, the excess is transmitted to the power company. .
[0003]
The amount of power transmitted from the power plant and the amount of power consumed by the power load are tabulated by the integrated value in units of 30 minutes, and if the difference is within a predetermined value such as ± 3% that is contracted in advance The settlement is made assuming that the power transmitted from the power plant is consumed by the power load.
[0004]
When the difference between the amount of transmitted power and the amount of consumed power is outside the specified value, and the amount of transmitted power is greater than the amount of consumed power, the specific-scale electric power company has transmitted power to the power company free of charge. When it is smaller than the amount of power consumption, expensive power is purchased from an electric power company, and in any case, economic loss occurs.
Therefore, the amount of power transmitted from the power plant is controlled to match the amount of power consumed by the power load, and for example, an instantaneous value of power consumption is transmitted to the power plant at a predetermined cycle such as 5 minutes, The power plant controls the amount of power transmission based on the received instantaneous value.
[0005]
[Problems to be solved by the invention]
However, in the control based on the instantaneous value, there is a problem that the difference between the transmission power amount and the power consumption amount is likely to occur due to factors such as the followability of the generator, fluctuations in power consumption in a short time, and measurement errors between the power consumption and the transmission power. There is a problem that this leads to economic loss.
[0006]
The present invention has been made in view of such circumstances, and controls transmission power not only based on the instantaneous value of power consumption but also based on the difference between the integrated value of power consumption and the integrated value of transmission power. By determining the transmission power control target value by correcting the instantaneous value of power consumption so that the difference between the integrated values is zero, the difference between the transmission power amount and the power consumption amount is reduced, and economic loss is prevented. The main object is to provide a transmission power control method and a transmission power control system to which the method is applied.
In other words, while taking advantage of the control based on the instantaneous value that makes it easy to obtain the latest power consumption information, the advantage of the control based on the integrated value that can reduce the deviation between the power consumption and the transmission power amount can be adopted. In addition, a transmission power control system with excellent responsiveness and accuracy is constructed.
As a result, it is possible to suppress the difference between the transmission power consumption and the power consumption due to factors such as the power consumption and transmission power measurement error that occur when only the instantaneous value is controlled. It is also possible to suppress the occurrence of a difference between the amount of transmitted power and the amount of power consumed due to a control delay due to insufficient accumulation of integrated values.
[0007]
Also, by integrating the instantaneous value of power consumption received from the power load and calculating the integrated value of power consumption, even if the integrated value of power consumption cannot be obtained from the power load, economic loss is prevented Another object is to provide a transmission power control method and a transmission power control system capable of controlling transmission power to be transmitted.
[0008]
[Means for Solving the Problems]
The transmission power control method according to the first aspect of the present invention is the transmission power control method for a power generator that generates power to be transmitted to a power load, wherein the integrated value of the amount of power for a predetermined period consumed by the power load and the predetermined power transmitted by the power generator Calculate the deviation integrated value indicating the difference between the integrated values of the amount of power during the period, obtain the differential value obtained by differentiating the calculated deviation integrated value, and based on the instantaneous value of the power consumed by the power load and the differential integrated value of the deviation A target value of the transmission power is determined, and the transmission power is controlled to approach the determined target value .
[0009]
In the transmission power control method according to the present invention, by controlling the transmission power to approach the target value determined based on the instantaneous value and deviation integrated value related to power consumption, due to factors such as power consumption fluctuation in a short time, It is possible to reduce the difference between the amount of transmitted power and the amount of consumed power and prevent economic loss. In addition, it is only necessary to add a process for determining the target value by adding / subtracting the differential value obtained by differentiating the deviation integrated value to the conventional system that determines the target value based on the instantaneous value. It is possible to realize a system that prevents economic loss simply by remodeling.
[0010]
A transmission power control system according to a second aspect of the present invention is a transmission power control system for a generator that generates power to be transmitted to a power load via a transmission line, a means for receiving an instantaneous value of power consumption consumed by the power load, Integrated value receiving means for receiving a power consumption integrated value indicating the amount of power consumed by the load for a predetermined period; means for receiving a transmitted power integrated value indicating the amount of power transmitted by the generator for the predetermined period; and received power consumption integrated Means for calculating a deviation integrated value indicating a difference between the value and the transmission power integrated value, means for obtaining a differential value obtained by differentiating the calculated deviation integrated value , and a target of transmission power based on the received instantaneous value and the obtained differential value It is characterized by comprising a determining means for determining a value and a means for controlling the transmission power based on the target value determined by the determining means.
[0011]
In the transmission power control system according to the present invention, by determining and controlling the target value of transmission power based on the instantaneous value and deviation integrated value related to power consumption, the amount of transmission power due to factors such as power consumption fluctuation in a short time If the processing is performed to reduce the difference in power consumption and calculate the deviation integrated value in a cycle such as 5 minutes shorter than 30 minutes, which is a settlement unit with the electric power company, the generator It is possible to reduce the difference between the amount of transmitted power and the amount of power consumption and prevent economic loss without causing a sudden change in output and when there is a lag in the clock that counts the settlement unit. . In addition, it is only necessary to add a process for determining the target value by adding / subtracting the differential value obtained by differentiating the deviation integrated value to the conventional system that determines the target value based on the instantaneous value. It is possible to realize a system that prevents economic loss simply by remodeling.
[0014]
A transmission power control system according to a third aspect of the present invention is the transmission power control system according to the second aspect , further comprising integrated value calculating means for calculating an integrated power consumption value by integrating instantaneous values of the received power consumption, wherein the integrated value receiving means is the integrated value The power consumption integrated value calculated by the value calculating means is received.
[0015]
In the transmission power control system according to the present invention, by calculating the power consumption integrated value from the received instantaneous value, even in a system where the power consumption integrated value cannot be obtained from the power load, the difference between the transmission power amount and the power consumption amount is calculated. It is possible to reduce and prevent economic loss.
[0016]
A transmission power control system according to a fourth aspect of the present invention is the transmission system according to the second or third aspect , wherein the transmission line is managed by a general electric company, the generator is managed by a specific scale electric company, and the generator Transmission of the electric power generated by is a consignment using a transmission line managed by the general electric utility.
[0017]
In the transmission power control system according to the present invention, it is possible to reduce the difference between the transmission power amount and the power consumption amount by applying to the consignment of power, and to prevent economic loss.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.
Embodiment 1 FIG.
FIG. 1 is an explanatory diagram conceptually showing a transmission power control system according to Embodiment 1 of the present invention.
In the figure, reference numeral 100 denotes a power generation facility managed by a specific scale electric power company. A power generator 10 is installed in the power generation equipment 100, and the electric power generated by the power generator 10 is an electric power company that is a general electric power company. Are transmitted to the power loads 30, 30,... Installed in the consumption facilities 300, 300,... Managed by a plurality of consumers, respectively.
[0019]
The generator 10 and the power loads 30, 30,... Have a communication function, are connected to a public communication network NW such as the Internet, and a specific scale electric power company that retails the power generated by the generator 10 to consumers. It communicates with the management apparatus 40 installed in the management equipment 400 to be managed, and the specific scale electric power company or the power generation company manages the information regarding the power consumed by each power load 30, 30,. It transmits to the power generation equipment 100.
[0020]
In addition, the power line 20 is connected to devices and facilities such as an external generator (not shown) managed by the electric power company, and the power consumed by each of the power loads 30, 30,. In the case where a shortage of power is transmitted from the power company and the power transmitted from the generator 10 exceeds the power consumed by each power load 30, 30, ..., the excess power is transmitted to the power company. Is done.
[0021]
FIG. 2 is a block diagram schematically showing the configuration of the transmission power control system according to Embodiment 1 of the present invention.
The power generation facility 100 includes an internal electric wire 11 connected to the transmission line 20 to transmit electric power generated by the generator 10, and the internal electric wire 11 includes a wattmeter 12 for measuring an instantaneous value of the transmitted electric power and a predetermined period. A watt-hour meter 13 for measuring the integrated value of the amount of power transmitted to is disposed.
[0022]
The instantaneous value of the transmission power measured by the wattmeter 12 is a generator control panel 14 that performs transmission power constant control for controlling the generator 10 to bring the transmission power transmitted from the generator 10 close to the target value, and the generator 10. To a PLC (Programmable Logic Controller) 15 used for various controls.
Further, the integrated value of the transmission power amount measured by the watt hour meter 13 is sent to the PLC 15.
[0023]
The generator control panel 14 and the PLC 15 are connected to an internal communication network 17 such as a LAN (Local Area Network) managed by the network computer 16, and are connected to a TA (Terminal Adapter) via a hub 18 connected to the internal communication network 17. ) Or the like is connected to the public communication network NW.
Various information communication is performed with the outside.
[0024]
The consumption facility 300 includes an internal electric wire 31 connected to the power transmission line 20 to receive the electric power generated by the generator 10, and the electric power received by the internal electric wire 31 is transmitted to the electric power load 30 as electric power consumption.
The internal electric wire 31 is provided with a power meter 32 that measures an instantaneous value of power consumption and a watt hour meter 33 that measures an integrated value of the amount of power consumed during a predetermined period. The measured power consumption is an instantaneous value of power consumption and the power consumption amount that is an integrated value is sent to the PLC 34.
[0025]
The PLC 34 is connected to an internal communication network 36 such as a LAN managed by the network computer 35, and is connected to the public communication network NW by a communication device 38 such as TA via a hub 37 connected to the internal communication network 36.
Various information communication is performed with the outside.
[0026]
The management equipment 400 includes management devices 40, 40,... Using various computers such as server computers. The management devices 40, 40,... Are connected to an internal communication network 41 such as a LAN. The communication device 43 such as TA is connected to the public communication network NW through the hub 42 connected to the network.
Various information communication is performed with the outside.
[0027]
FIG. 3 is a block diagram showing processing of the transmission power control system according to Embodiment 1 of the present invention.
... Instantaneous values of power consumption obtained by measuring the power consumed by the power loads 30, 30,... Installed in the respective consumption facilities 300, 300,. And the integrated value of the power consumption obtained by measuring the power consumption of each power load 30, 30,... By a respective watt hour meter 33, 33,. The data is sent to the management facility 400 via the public communication network NW at a predetermined cycle.
[0028]
In the management facility 400, the instantaneous value of each power consumption sent from each power load 30, 30,... Is received (step S1), the sum of the received instantaneous values is obtained (step S2), and the sum of the obtained instantaneous values is obtained. Then, correction by dividing by a constant considering the attenuation rate such as transmission loss is performed (step S3), and further correction is performed by the correction value calculated by the correction logic for predicting the trend of power consumption (step S4). And the sum of the instantaneous values corrected by S4 is sent to the power generation facility 100 via the public communication network NW as a power supply command.
[0029]
Further, the integrated value of the power consumption sent from each power load 30, 30,... Is received (step S5), the sum of the integrated values of the received power consumption is obtained (step S6), and the sum of the obtained integrated values is obtained. Then, correction by dividing by the constant used in step S3 is performed (step S7), and the sum total of the integrated values after correction in steps S6 and S7 is sent to the power generation facility 100 via the public communication network NW.
[0030]
In the power generation facility 100, the integrated value of the transmitted electric energy obtained by measuring the integrated value of the electric energy transmitted from the generator 10 by the watt hour meter 13 is sent to the PLC 15, and is received as the integrated transmitted power value by the PLC 15 (step S8). ) Further, the sum of the corrected power consumption sent from the management facility 400 is accepted as a power consumption integrated value (step S9), the transmission power integrated value received in step S8 and the power consumption integrated value received in step S9. The difference is calculated as a deviation integrated value (step S10), and the calculated deviation integrated value is differentiated (step S11).
The differentiation process in step S11 is a process for obtaining a correction value that suppresses fluctuations so that the integrated deviation value approaches a predetermined value, for example, 0.
[0031]
Then, the sum of instantaneous values is received from the management facility 400 as a power supply command (step S12), and the target value of the transmission power of the generator 10 is determined based on the received sum of instantaneous values and the integrated deviation value differentiated in step S11. (Step S13), the determined target value of the transmitted power is sent to the power generation control panel 14 as a power transmission command (Step S14), and the generator control panel 14 controls the generator 10 to bring the transmitted power closer to the received target value. Transmission power constant control is performed (step S15).
The instantaneous value of transmitted power transmitted from the generator 10 is sent to the generator control panel 14 for feedback control.
[0032]
Steps S8, S10, S13, S14, and S15 are processes that are performed without going through the public communication network NW, and therefore, high-precision control is performed in a state close to real time based on the measured transmission power integrated value. be able to.
[0033]
The transmission power integrated value is also sent from the power generation facility 100 to the management facility 400 via the public communication network NW (step S16). In the management facility 400, the transmission power integrated value received from the power generation facility 100, and steps S6 and The difference between the power consumption integrated values indicated by the sum of the integrated values corrected in S7 is calculated as a deviation integrated value (step S17), and the correction logic predicts the power consumption trend based on the calculated deviation integrated value. A correction value is calculated (step S18), and the calculated correction value is used for the correction in step S4.
[0034]
Next, changes in transmission power when transmission power constant control is performed in the transmission power control system according to Embodiment 1 of the present invention will be described.
FIG. 4 is a graph showing changes in transmission power when transmission power constant control is performed. FIG. 4A shows changes in a conventional transmission power control method in which control is performed using only instantaneous values. b) shows the change in the transmission power control method of the present invention in which the control including the integrated value is performed.
[0035]
4 (a) and 4 (b), the time is plotted on the horizontal axis and the power is plotted on the vertical axis, and the relationship is shown. The solid line shows the target value for constant transmission power control, and the dotted line shows the results. The instantaneous value of the transmission power is shown as the value, and the hatched area surrounded by the solid line and the dotted line shows the difference.
In FIG. 4A, since power transmission control is performed based on the instantaneous value, the state in which the difference between the target value and the actual value is not eliminated due to factors such as the followability of the generator continues. In the example shown in (2), the state in which the transmitted power is smaller than the consumed power continues.
In FIG. 4B, since the integrated value is taken into account, due to factors such as followability, the transmitted power is made excessive immediately after the state where the transmitted power is too low, and the amount of power in a predetermined period becomes constant. It has been corrected as follows.
In other words, when the target value is increased from a low value, the actual value is lower than the target value when the target value becomes high. After the target value rises and exceeds the target value, it matches the target value. The integrated value of the target value indicating the amount of electric power in the predetermined period and the integrated value of the actual value indicate the same value or approximate value by transitioning to a value that matches the target value.
In FIG. 4B, this is surrounded by a solid line and a dotted line that indicate the difference between the target value and the actual value that appear below the target value when the actual value is lower than the target value when the target value is increased from a low value. The hatched area and the hatched area that appears above the target value when the actual value is higher than the target value are also indicated by this area.
When the target value is lowered from a higher value, the actual value becomes lower than the target value from a state higher than the target value, and then coincides with the target value.
[0036]
Embodiment 2. FIG.
The second embodiment is a form in which the sum of instantaneous values is sent as a power supply command from the management facility 400 to the power generation facility 100 in the first embodiment, but the sum of integrated values is not sent. In other words, the sum of the integrated values is substituted by integrating the instantaneous values.
In addition, since the structure of the transmission power control system in Embodiment 2 is the same as that of Embodiment 1, it shall refer to Embodiment 1 and the description is abbreviate | omitted.
[0037]
FIG. 5 is a block diagram showing processing of the transmission power control system according to Embodiment 2 of the present invention.
In the second embodiment, the integrated value of power consumption performed in step S9 of the first embodiment is sent from the management facility 400 to the power generation facility 100, and the process accepted by the power generation facility 100 is not performed. The sum of the values is integrated (step S19), the obtained value is used as the power consumption integrated value, and the difference from the transmitted power integrated value received in step S8 is calculated as the deviation integrated value (step S10).
In addition, about the process similar to Embodiment 1, the same code | symbol as Embodiment 1 is attached | subjected and the description is abbreviate | omitted.
[0038]
In the above-described embodiment, the power generation facility 100 and the management facility 400 are connected via the public communication network NW. However, when the entities that manage both facilities are the same entity, they are connected via the internal communication network. By doing so, it is possible to realize a high-speed communication environment and perform control with higher accuracy.
[0039]
Further, in the above-described embodiment, the control is performed based on the instantaneous value and integrated value of the power consumption in the power load, or only the instantaneous value. However, the present invention is not limited to this, and only the integrated value is received from the power load. The power transmission target value may be determined and controlled by the process of determining excess or deficiency with respect to the target value.
[0040]
Further, in the above-described embodiment, a mode is shown in which differentiation is performed in order to bring the deviation integrated value indicating the difference between the power consumption integrated value and the transmission power integrated value closer to 0, but the present invention is not limited to this, and the deviation integrated value is not limited to this. Other operations and / or controls may be used as long as they can approach 0.
[0041]
【The invention's effect】
As described above in detail, in the transmission power control method and the transmission power control system according to the present invention, the deviation integrated value indicating the difference between the integrated value of the power consumption amount and the integrated value of the transmission power transmission amount should be close to a predetermined value, for example, 0. By determining and controlling the target value of transmitted power, the difference between the transmitted power amount and the consumed power amount due to factors such as power consumption fluctuations in a short time is reduced, and moreover from 30 minutes, which is the unit of settlement with the power company If processing is performed so that the deviation integrated value is calculated in a short cycle such as 5 minutes, the output of the generator does not fluctuate abruptly for correction, and there is a shift in the clock that counts the settlement unit. Even in such a case, it is possible to reduce the difference between the amount of transmitted power and the amount of consumed power, and it is possible to prevent economic loss.
[0042]
Further, in the present invention, by calculating the power consumption integrated value from the instantaneous value of the power consumption, even in a system in which the power consumption integrated value cannot be obtained from the power load, the difference between the transmission power amount and the power consumption amount is reduced. It is possible to prevent a typical loss, and so on.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram conceptually showing a transmission power control system in Embodiment 1 of the present invention.
FIG. 2 is a block diagram schematically showing a configuration of a transmission power control system according to Embodiment 1 of the present invention.
FIG. 3 is a block diagram showing processing of a transmission power control system in Embodiment 1 of the present invention.
FIG. 4 is a graph showing changes in transmission power when transmission power constant control is performed.
FIG. 5 is a block diagram showing processing of a transmission power control system in Embodiment 2 of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Generator 100 Power generation equipment 20 Transmission line 30 Electric power load 300 Consumption equipment 40 Management apparatus 400 Management equipment

Claims

In a transmission power control method for a generator that generates electric power to be transmitted to an electric load,
Calculating a deviation integrated value indicating a difference between an integrated value of the electric energy consumed by the power load for a predetermined period and an integrated value of the electric energy transmitted by the generator for the predetermined period;
Find the differential value by differentiating the calculated deviation integrated value ,
Determine the target value of transmitted power based on the instantaneous value of the power consumed by the power load and the differential value of the integrated deviation value,
A transmission power control method, wherein transmission power is controlled to approach a determined target value .

In a transmission power control system for a generator that generates power to be transmitted to a power load via a transmission line,
Means for receiving an instantaneous value of power consumption consumed by the power load;
Integrated value receiving means for receiving a power consumption integrated value indicating the amount of power consumed by the power load for a predetermined period;
Means for receiving a transmission power integrated value indicating the amount of power of the predetermined period transmitted by the generator;
Means for calculating a deviation integrated value indicating a difference between the received power consumption integrated value and the transmission power integrated value;
Means for obtaining a differential value obtained by differentiating the calculated deviation integrated value ;
Determining means for determining a target value of transmission power based on the received instantaneous value and the obtained differential value ;
Means for controlling transmission power based on the target value determined by the determination means.

Integrated value calculation means for calculating the power consumption integrated value by integrating the instantaneous value of the received power consumption,
The transmission power control system according to claim 2 , wherein the integrated value receiving unit is configured to receive the power consumption integrated value calculated by the integrated value calculating unit.

The transmission line is managed by a general electric utility,
The generator is managed by a specific scale electric utility,
The transmission power control system according to claim 2 or 3 , wherein transmission of electric power generated by the generator is consignment using a transmission line managed by the general electric utility.