A Decomposition Method for Security Constrained Economic Dispatch of a Three-Layer Power System

2017 3rd International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Yang, Junfeng^1 ; Luo, Zhiqiang^1 ; Dong, Cheng^2 ; Lai, Xiaowen^2 ; Wang, Yang^2

Power Dispatch and Control Center, State Grid Corporation of China, Beijing

100084, China^1

Dept. of Electrical Engineering, Tsinghua University, Beijing

100084, China^2

关键词: Computational time;    Decomposition methods;    Information exchanges;    Large-scale power systems;    Network reduction;    Price-response functions;    Security-constrained economic dispatch;    Signal information;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/108/5/052088/pdf
DOI  :  10.1088/1755-1315/108/5/052088

来源: IOP

【 摘 要 】

This paper proposes a new decomposition method for the security-constrained economic dispatch in a three-layer large-scale power system. The decomposition is realized using two main techniques. The first is to use Ward equivalencing-based network reduction to reduce the number of variables and constraints in the high-layer model without sacrificing accuracy. The second is to develop a price response function to exchange signal information between neighboring layers, which significantly improves the information exchange efficiency of each iteration and results in less iterations and less computational time. The case studies based on the duplicated RTS-79 system demonstrate the effectiveness and robustness of the proposed method.