Research on the strategy of cooperative control between photovoltaic grid-connected and reactive power compensation technology

The Journal of Engineering

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[1] State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Guangrong Road N0.8, Hongqiao District, Tianjin, People's Republic of China;

关键词: harmonics suppression;    power supply quality;    invertors;    power generation control;    power grids;    photovoltaic power systems;    reactive power control;    distributed power generation;    reactive power compensation technology;    power grid;    current distortion;    power quality;    instantaneous reactive power theory;    active current current;    reactive current current;    harmonic current;    control reactive power compensation;    converter control model;    grid-connected mode;    control strategy;    photovoltaic grid-connected inverter system;    photovoltaic grid-connected power system;    active power;   

DOI  :  10.1049/joe.2018.8905

来源: publisher

【 摘 要 】

When connecting a large number of generating sets into power grid, there will be the harmonic wave generated in power grid causing voltage and current distortion, which affects power quality seriously. Based on the instantaneous reactive power theory, the active current, reactive current and harmonic current can be real-time monitored. The P–Q method can be adopted to control reactive power compensation. By building the converter control model, the variation of reactive power of power grid between photovoltaic grid-connected inverter working under stand-alone mode and grid-connected mode can be analysed via a simulation system. The experimental analysis of reactive power compensation and harmonic suppression, the availability of the control strategy of the photovoltaic grid-connected inverter system can be proved. Using this novel strategy, the photovoltaic grid-connected power system can not only provide active power but also compensate reactive power and suppress harmonic, which will improve power quality.

【 授权许可】

CC BY