Fast Equivalent Modeling of Cascaded Static Synchronous Compensator Under Higher Voltage

4th International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Xiong, Yi^1 ; Tang, Xuejun^1 ; Zhang, Yang^2 ; Yang, Xiaopin^2 ; Wen, Wu^3 ; Xie, Dong^1 ; Sun, Lipin^1 ; Zhou, Qiupeng^1 ; Liao, Xiaohong^1 ; Ming, Yue^1 ; Guo, Ting^1 ; Zou, Yuxin^1 ; Liao, Shuang^1 ; Ma, Li^1 ; Li, Lupin^4 ; Jin, Fenghua^4 ; Chen, Xiangming^4

State Grid Hubei Electric Power Company, Economic Technology Research Institute, Hubei Province, Wuhan, China^1

Nanchang Institute of Technology, Nanchang, Jiangxi Province, China^2

Wuhan University, Hubei Province, Wuhan, China^3

Changsha University of Technology, Hunan Province, Changsha, China^4

关键词: Analysis and simulation;    Equivalent electric circuits;    Equivalent model;    Equivalent resistance;    Iterative algorithm;    Iterative calculation;    Mathematical properties;    Variable resistors;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/237/3/032123/pdf
DOI  :  10.1088/1755-1315/237/3/032123

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Cascaded STATCOM including huge number of sub-modules under higher voltage needs rapid modeling to analyze efficiently. This paper presents a discrete iterative algorithm based on equivalent modeling method, which can greatly simplify mathematical model of STATCOM under higher voltage. According to the mathematical properties of the sub-module DC capacitor, it is equivalent to a historical series branch voltage source with an equivalent resistance. By simplifying IGBT to equivalent variable resistor, H-bridge is simplified to an equivalent branch with PWMs. Control system can calculate each IGBT PWM pulse signal by embedding to the equivalent electric circuit. Created an iterative calculation algorithm for the equivalent circuit, and evaluated the two basic errors that are algorithm error and parameter error. By comparing ±100MVar STATCOM's waves between field data and simulation data, it is proved correct that the rapid equivalent modeling method. In-depth comparison of the key parameters of the theory and simulation instructions, it is very close between the theory and the practice, and methods can greatly simplify the analysis and simulation calculations.