Distributed cooperative control algorithm for optimal power sharing for AC microgrids using Cournot game theory
- PDF / 965,509 Bytes
- 11 Pages / 595.276 x 790.866 pts Page_size
- 52 Downloads / 215 Views
(0123456789().,-volV)(0123456789(). ,- volV)
S.I. : ATCI 2020
Distributed cooperative control algorithm for optimal power sharing for AC microgrids using Cournot game theory Hong Zhou1 • Chang Yu1 Received: 26 May 2020 / Accepted: 21 August 2020 Ó Springer-Verlag London Ltd., part of Springer Nature 2020
Abstract Research on the optimal power allocation of large-scale distributed generator (DG) units based on user power generation to access microgrids (MGs) in a multi-agent system framework has recently become the focus of modern grid and energy concerns. In this paper, according to the Cournot oligopoly game, the Nash equilibrium point between the power generation company and power generation user of the MG operating in island mode is obtained. According to the obtained Nash equilibrium point, the optimal ratio of power generated by the power generation company and by the power generation user in the model is calculated. At the same time, to achieve the maximum benefit and stable operation of the MG, a distributed cooperative control algorithm based on consensus theory is proposed. This control algorithm can cause each DG to generate power according to the total consumption load. The optimal power generation ratio distribution based on the Nash equilibrium point eliminates the steady-state frequency deviation of each DG in the MG, thereby ensuring the user’s power quality. The simulation results show that the control algorithm can achieve the above research goals. Keywords Microgrid Distributed control Game theory Islanded Power sharing
1 Introduction The operation of microgrids (MGs) in island mode can solve the problem of failure in a large power grid or the inability to access a large power grid in remote areas. However, in island mode, the MG must maintain grid frequency and voltage stability [1, 2]. At the same time, when there are a large number of distributed generator (DG) units based on user power generation to access the MG, it is necessary to balance the competition between the user power generation and the power generation company in the MG. Therefore, optimal power generation for an islanded MG is a complex and challenging task. When the MG is operating in island mode, the traditional droop control method has the disadvantage of causing a slight deviation between the actual frequency and the voltage value and the expected value [3–7]. How to restore voltage and frequency to certain reference values is & Chang Yu [email protected] 1
The School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
critical for MG control issues. To solve this problem, a layered control algorithm based on sagging is introduced [8, 9], which includes primary, secondary, and tertiary control to promote AC MG [10–12] and DC MG [13, 14]. In general, hierarchical control can be divided into three levels, primary control, secondary control, and tertiary control, and each hierarchical control has its own control objectives: (1) the primary control mainly ensures the voltage and frequency
Data Loading...
