电网随机扰动下的光伏微网逆变器建模及控制研究

doi:10.16088/j.issn.1001-6600.2020.01.003

Abstract

Abstract: In order to study the control method and performance of the PV microgrid inverter system when applying random disturbance, random disturbance is applied to the common connection point signal of the PV microgrid inverter system, and modeling is carried out in consideration of random disturbance. The predictive control method of integral compensation can not only predict the future output state of the system, but also eliminate the static error, effectively suppress the current and voltage distortion phenomenon of the inverter output, and maintain the stability of the system.The simulation model of the inverter system was built by using Simulink platform of MATLAB.The simulation results showed that the total harmonic distortion (THD) of the current and voltage output by the inverter is 0.57% and 2.57%, respectively, which meets the national grid’s standard for total harmonic distortion (THD ≤5%) and guarantees the stability of the output waveform.The research shows that this improved control method keeps the single-phase PV microgrid inverter system stable under random disturbances,which has certain reference value for the theory and application research of photovoltaic microgrid.

Key words: photovoltaic, photovoltaic microgrid inverter, random disturbance, predictive control, integral compensation

CLC Number:

TM74

XIANG Qinqin, LIAO Zhixian, LI Tinghui, JIANG Pinqun, HUANG Guoxian. Research on Modeling and Control of Photovoltaic Microgrid Inverter under Random Disturbance of Power Grid[J].Journal of Guangxi Normal University(Natural Science Edition), 2020, 38(1): 19-25.

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Research on Modeling and Control of Photovoltaic Microgrid Inverter under Random Disturbance of Power Grid

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