| 引用本文: | 王秀云,毛瑞鹏,田壁源,等.基于PI与准PR联合控制的光伏并网电流优化[J].电力系统保护与控制,2017,45(7):121-125. |
| WANG Xiuyun,MAO Ruipeng,TIAN Biyuan,et al.Optimal control of photovoltaic grid-connected current based on PI and quasi-PR control[J].Power System Protection and Control,2017,45(7):121-125 |
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| 摘要: |
| 针对光伏并网逆变器在采用传统比例积分(PI)控制器时不能实现无静差跟踪和并网电流逆变器直流分量注入问题，提出PI与准PR联合控制的光伏并网电流优化策略。在介绍了PI与准PR联合控制的原理的基础上，详细分析了准PR控制的原理和算法实现。准PR控制能够实现无静差跟踪，PI与准PR联合控制实现了直流的抑制。采用Matlab/Simulink进行仿真研究，结果表明能够对并网电流的无静差控制，消除了单一PI控制所产生的相位误差，抑制了直流分量，并且具有良好的并网波形质量。 |
| 关键词: 光伏并网 逆变器 联合控制 电流控制 准PR控制 无静差控制 |
| DOI：10.7667/PSPC160594 |
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| 基金项目: |
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| Optimal control of photovoltaic grid-connected current based on PI and quasi-PR control |
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WANG Xiuyun1,MAO Ruipeng1,TIAN Biyuan1,HUANG Jingli2
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(1. School of Electrical Engineering, Northeast Dianli University, Jilin 132012, China;2. Jihua Group Information Network Technology Co., Ltd.., Jilin 132000, China)
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| Abstract: |
| Photovoltaic (PV) grid inverter can’t achieve static-error-free track while using conventional proportional integral (PI) and DC component of the current injection problem of grid inverter, for which, PI and quasi-proportional resonant (PR) control strategy of PV grid current optimization is proposed. The fundamentals of PI and quasi-PR controllers are introduced, and the principle and algorithm of quasi-PR are analyzed. Quasi-PR control can achieve static-error-free tracking, and PI and quasi-PR control strategy can suppress the DC component. Results of simulative study with MATLAB/Simulink show that, the static-error-free control of grid-connected current is realized, the phase error introduced by single PI controller is eliminated, the DC component is suppressed, and the excellent grid-connected waveform is achieved. |
| Key words: photovoltaic grid-connection inverters integrated control electric current control quasi-PR control static- error-free control |
