Economic Value Analysis on Voltage Stabilization by Reactive Power Compensation of Demand Side Equipment

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  • Takagi Masaaki
    Socio-economic Research Center, Central Research Institute of Electric Power Industry
  • Tagashira Naoto
    Socio-economic Research Center, Central Research Institute of Electric Power Industry
  • Okada Kenji
    Socio-economic Research Center, Central Research Institute of Electric Power Industry
  • Asano Hiroshi
    Socio-economic Research Center, Central Research Institute of Electric Power Industry

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  • 需要側機器の無効電力補償による電圧上昇対策の経済価値分析
  • ジュヨウガワ キキ ノ ムコウ デンリョク ホショウ ニ ヨル デンアツ ジョウショウ タイサク ノ ケイザイ カチ ブンセキ

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Recently, the installed capacity of photovoltaic (PV) systems has been increasing rapidly due to the enforcement of the feed-in tariff scheme in Japan. However, the reverse power flow from the roof-mounted PV systems could cause the voltage unbalance such as voltage-rises in distribution network. Conventionally, the voltage is adjusted by the reactive power compensation using SVC (Static Var Compensator) installed in the high-voltage distribution network. On the other hand, reactive power compensation using demand side equipment such as EV chargers in the low-voltage distribution network is promising as cost-effective. This paper proposes an evaluation method for economic value of reactive power compensation. Using this method, we evaluated the cost-effectiveness of the demand side equipment, and compared it with SVC. As a target cost, we revealed an annual equipment cost of the demand side equipment that achieves the same cost saving as SVC.

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