JP5933857B1 - 電圧制御装置および電圧計測装置 - Google Patents
電圧制御装置および電圧計測装置 Download PDFInfo
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Abstract
Description
図1は、本発明の実施の形態にかかる配電系統電圧制御システムの構成例を示す図である。図1において、配電用変圧器1は、例えば変電所に設置され、負荷電流を流した状態で二次側電圧を変更できる配電用変圧器としてのLRT(Load Ratio Control Transformer:負荷時タップ切替変圧器)およびこのLRTのタップ位置を調整することによりLRTを制御する電圧制御装置を備えている。
Δp(i)>aのとき、
G(i)=b×Δv(i)/Δp(i)+(1−b)G(i−1)
Δp(i)≦aのとき、
G(i)=G(i−1)
…(1)
aは、0より大きい値であり、変換係数Gの算出の際にPが有意に変化した場合のΔv(i)/Δp(i)のみを考慮するためのしきい値である。bは1未満の定数である。
ΔVmax=ΔPmax×G …(2)
ΔVmax´=ΔPmax´×G …(3)
換算電圧裕度
=依頼元の電圧裕度×自端の電圧感度/依頼元の電圧感度 …(4)
上限値=適正電圧上限値−換算電圧裕度 …(5)
下限限値=適正電圧下限値+換算電圧裕度 …(6)
Claims (7)
- 高圧系統の配電線に接続され前記配電線の電圧を制御する複数の電圧制御機器を備える配電系統電圧制御システムにおいて、適正電圧上限値および適正電圧下限値の範囲内に電圧が維持されるように前記電圧制御機器を制御する電圧制御装置であって、
前記電圧制御機器により計測された電圧および有効電力を用いて、前記電圧制御機器により計測された電圧と適正電圧上限値または適正電圧下限値との差である電圧裕度と、有効電力の変動量と電圧の変動量との比である電圧感度と、を算出する変動算出部と、
他の電圧制御装置の制御目標範囲の上限値または下限値の変更を依頼するための上下限変更依頼情報を生成する上下限変更依頼情報生成部と、
上下限変更依頼情報を自装置外から受信したとき当該上下限変更依頼情報の内容に応じて自装置の制御目標範囲の上限値または下限値の変更を行う上下限変更処理部と、
上下限変更依頼情報を自装置外から受信し、上下限変更依頼情報を自装置以外の電圧制御装置へ送信する通信処理部と、
を備え、
前記上下限変更依頼情報は、前記電圧裕度と前記電圧感度とを示す情報を含むことを特徴とする電圧制御装置。 - 前記上下限変更処理部は、上下限変更依頼情報を自装置外から受信したとき当該上下限変更依頼情報に含まれる前記電圧裕度および前記電圧感度に基づいて、自装置の制御目標範囲の上限値または下限値の変更を行うことを特徴とする請求項1に記載の電圧制御装置。
- 前記変動算出部は、前記電圧制御機器により計測された電圧および有効電力を用いて、単位時間当たりの電圧の正側の最大の変動量の予測値である第1の予測値と単位時間当たりの電圧の負側の最大の変動量の予測値である第2の予測値とを算出し、
前記上下限変更依頼情報生成部は、前記電圧制御機器により計測された電圧に前記第1の予測値を加算した値が適正電圧上限値を超える場合、または前記電圧制御機器により計測された電圧から前記第2の予測値を減算した値が適正電圧下限値を下回る場合、前記上下限変更依頼情報を生成することを特徴とする請求項1または2に記載の電圧制御装置。 - 前記電圧制御機器により計測された電圧および有効電力を用いて、単位時間当たりの有効電力の変動量を単位時間当たりの電圧の変動量に換算するための変換係数を算出する変換係数算出部、
を備え、
前記変動算出部は、前記電圧制御機器により計測された有効電力を用いて、単位時間当たりの有効電力の正側の変動量の一定期間内の最大値である第1の最大値と、単位時間当たりの有効電力の負側の変動量の一定期間内の最大値である第2の最大値とを算出し、前記第1の最大値に前記変換係数を乗じた値を前記第1の予測値として算出し、前記第2の最大値に前記変換係数を乗じた値を前記第2の予測値として算出することを特徴とする請求項3に記載の電圧制御装置。 - 前記変動算出部は、前記電圧制御機器により計測された有効電力を一次遅れフィルタにより平滑化した値または移動平均値または区間平均値に基づいて前記第1の最大値および前記第2の最大値を算出することを特徴とする請求項4に記載の電圧制御装置。
- 前記電圧制御機器が列車の減速時に生成される回生電力を交流電力に変換して前記配電線に供給する電圧制御機器を制御する場合は、前記一定期間を第1の期間とし、
太陽電池に接続される電圧制御機器であるパワーコンディショナを制御する場合は、前記一定期間を第1の期間より短い第2の期間とすることを特徴とする請求項4または5に記載の電圧制御装置。 - 高圧系統の配電線に接続され前記配電線の電圧を制御する電圧制御機器と適正電圧上限値および適正電圧下限値の範囲内に電圧が維持されるように前記電圧制御機器を制御する電圧制御装置とを備える配電系統電圧制御システムにおいて、前記配電線に接続される電圧計測装置であって、
前記配電線の電圧および有効電力を計測する計測部と、
前記計測部により計測された電圧および有効電力を用いて、前記計測部により計測された電圧と適正電圧上限値または適正電圧下限値との差である電圧裕度と、有効電力の変動量と電圧の変動量との比である電圧感度と、を算出する変動算出部と、
電圧制御装置の制御目標範囲の上限値または下限値の変更を依頼するための上下限変更依頼情報を生成する上下限変更依頼情報生成部と、
上下限変更依頼情報を前記電圧制御装置へ送信する通信処理部と、
を備え、
前記上下限変更依頼情報は、前記電圧裕度と前記電圧感度とを示す情報を含むことを特徴とする電圧計測装置。
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