Coordinated Optimization of Energy Sharing and Voltage Regulation Service for PV prosumers in the Distribution Network

Abstract

The access of large-scale photovoltaics and the continuous development of distributed photovoltaic technology have gradually attracted more attention to the energy sharing and auxiliary service market. The significant relationship between active and reactive power in the low-voltage distribution network (DN) makes it difficult to consider energy sharing or voltage regulation in the auxiliary service market independently. This paper proposes a coordinated optimization method of energy sharing and voltage regulation service for PV prosumers in the DN, which uses the Stackelberg game to build a coordination mechanism between distribution network operator (DSO) and prosumers: DSO acts as the leader to determine the price and voltage regulation signals; PV prosumers acts as the follower to make energy management and reactive voltage regulation strategies based on prices and signals. In addition, the relationship between active and reactive power is studied through the amortized coefficients of DN operation cost. The effectiveness of the proposed method is verified in the IEEE 33-bus test system in terms of the prosumers' profits, DN operation cost, and node voltage.