Research on Harmonic Suppression of Microgrid Based on Improved Droop Control

2nd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Zhao, Deren^1 ; Ji, Peng^1 ; Xia, Fei^1 ; Xia, Zongze^1 ; Huang, Xiaobo^1 ; Cong, Peixian^1 ; Yang, Zhixiong^2 ; Di, Zhuo^1 ; Song, Li^1

State Grid Liaoyang Electric Power Supply Company, Liaoyang

111000, China^1

Kunming Institute of Physics, Kunming

650223, China^2

关键词: Controller outputs;    Droop control strategies;    Fundamental domain;    Harmonic contents;    Harmonic frequency;    Harmonic suppression;    Improved droop controls;    Superposition theorem;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/170/4/042164/pdf
DOI  :  10.1088/1755-1315/170/4/042164

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Previous harmonic suppression system is generally through the system detection for harmonic content in the system and corresponding harmonic frequency is obtained by active filter unit but in the opposite direction of harmonic signal to offset the harmonic wave of output voltage and current. This paper embarks from the internal system, according to the superposition theorem in the basic of the original, on the basis of improved droop control of a harmonic domain droop control strategy, finally through every harmonic controller output signal and fundamental domain prolaose controller output signal superposition for inverter input signal. This method from harmonic source in order tu reduce the system harmonic content, effectively reduce the use of filter equipment, improve the effiviency of the system, and increase the response speed of the system, to a certain extent, to reduce the harmonic THD has certain significance.