報告書番号

T03050

タイトル（和文）

需要地系統におけるループコントローラの開発 -―自端情報による分散制御方式の実証と評価―-

タイトル（英文）

Development of loop power flow controller for autonomous demand area power system-Demonstration and estimation of distributed control using local information-

概要 （図表や脚注は「報告書全文」に掲載しております）

配電系統の効率的な運用による分散型電源の有効利用を実現するため、当所は樹枝状配電系統の常開点にループコントローラ（LPC）を設置し、ループ・メッシュ運用を行うことを提案している。LPCには、回線間の潮流不平衡の解消および発電と需要の瞬時変化による電圧変動を抑制する即応性が求められる。一方、系統内の故障に対しては、樹枝状の保護システムと協調し、故障区間を局限化する機能が求められる。このため、様々な需給条件で適切に動作可能な自端情報による制御方式の開発が必要となる。既提案の自端制御方式に電圧変動の抑制制御と系統の故障制御を追加化し、基本機能の実証およびシミュレーション解析による分散制御動作を評価する。

概要 （英文）

To smooth introduction of the distributed generations, we proposed the loop or mesh structure for the distribution systems using loop power flow controller (LPC) at the opened switch which can connect the adjoining feeder. LPC is able to optimal control for distribution systems in the points of reducing voltage rise, voltage fluctuation and loss minimum power flow control, and so on, with acquisition of state of distribution systems. Adapting to the area that cannot use communication system, points of view at the power quality for the transition phenomena and limiting the fault area, we also required the distributed control using local voltage information for the LPC control.The purposes of this paper demonstrate basic functions of LPC and estimation of the control method using simulation analysis.We make a small change of the distributed control that we proposed. The change of the control method aims the cooperation with voltage controller at substation transformers and improvement of the voltage stability. We added functions (PQ cont.) of loop power flow and reactive power control by voltage drops of the feeders to the original control (P cont.).(1) Demonstration of basic functionPower flow control functions:The basic function of the distributed control was demonstrated by testing facility of distributed system located at the Akagi testing center in CRIEPI. We confirms the voltage control function that restrain the voltage rise from 4% to under 1% occurrence by power generation and increase of the load. For transition of power generation, the LPC response within 2 cycle and restrain the voltage rise compare with radial distribution system.Fault area limiting functions:We propose a basic function to separate the fault section that require in loop operation and demonstrate the function of LPC for fault control in case of observation zero phase voltage and not.(2) Estimation of distributed controlWe compare the voltage rise, voltage fluctuation and total line losses for radial distribution system, distributed control with LPC and optimal control with LPC. In case of the distributed control (PQ cont.), the voltage raises decrease with in half of radial system. The voltage fluctuation with PQ control about 1/3 of radial. The effects of added function show reduce the voltage rise and voltage fluctuation became half of P control. The voltage rise voltage fluctuation and the total line losses became as same as optimal control.Therefore, we expected expanding the area that is able to install LPC and improvement of transition response.

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