Optimal pricing algorithm to suppress voltage rise caused by reverse load flow in power distribution grid

摘要

This paper deals with an optimal pricing problem in a day-ahead electricity market to suppress voltage rise caused by reverse load flow in power distribution grid. Each consumer who has a PV system determines the amount of power consumption and selling electricity to maximize their own profit, and generator acts the same to determine the amount of power generation. However, much selling electricity causes voltage rise in distribution power grid. Therefore, this paper proposes reactive power market to give consumers an incentive to supply reactive power by Power Conditioning System. Reactive power market is modeled players, consumer, grid operator, and market. In this paper, the dual decomposition is applied to each market problem to maximize the social welfare based on selfish behavior of consumer and generator. Next, we propose an algorithm using Steepest Decent Method in order to solve each distributed problem, in addition, we show the convergence of the algorithm using Lyapunov stability theorem. Finally, simulation results show that the proposed algorithm levels power load keeping system voltage within proper value.