| 引用本文: | 周 林,廖 波,龙崦平,张林强,李怀花,杜金其.基于幅值积分的光伏并网功率调节系统研究[J].电力自动化设备,2013,33(1): |
| ZHOU Lin,LIAO Bo,LONG Yanping,ZHANG Linqiang,LI Huaihua,DU Jinq.Grid-connected photovoltaic power conditioner system based on amplitude integral[J].Electric Power Automation Equipment,2013,33(1): |
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| 摘要: |
| 三相光伏并网功率调节系统控制的关键之一是谐波、无功电流的准确检测和光伏有功电流指令信号的形成。为得到与电网电压正序基波同频同相的光伏有功电流，分析了幅值积分正序基波提取方法中参数K对输出正序基波电压相位偏移的影响，推导出K与频率偏差和正序基波电压相位偏移的关系式，合理取K值可准确提取正序基波电压。该系统无需锁相环可得到同步正、余弦信号。在ip-iq法基础上，引入2个标准选择器，使光伏有功电流与谐波、无功电流任意组合形成并网指令电流，实现有功注入与谐波抑制、无功补偿的任意组合性功能。MATLAB／Simulink仿真和RT-LAB实验结果验证了理论分析的正确性。 |
| 关键词: 光伏功率调节系统 幅值积分 指令电流运算 选择器 电能质量 太阳能 |
| DOI： |
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| 基金项目:国家高技术研究发展计划（863计划）（2011AA05A-301） |
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| Grid-connected photovoltaic power conditioner system based on amplitude integral |
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ZHOU Lin, LIAO Bo, LONG Yanping, ZHANG Linqiang, LI Huaihua, DU Jinq
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State Key Laboratory of Power Transmission Equipment & System Security and New Technology，Chongqing University，Chongqing 400030，China
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| Abstract: |
| The accurate detection of harmonics and reactive currents and the generation of photovoltaic active current reference are essential for the control of three-phase grid-connected photovoltaic power conditioner system. In order to get the photovoltaic active current with same frequency and phase as the positive-sequence fundamental voltage of grid，the influence of parameter K in the amplitude integral positive-sequence fundamental extraction on the phase deviation of output positive-sequence fundamental voltage is analyzed and the relationship between K and frequency／phase deviation of positive-sequence fundamental voltage is derived. The positive-sequence fundamental voltage can be accurately extracted when K is set properly. Synchronous sine or cosine signals can be obtained without PLL. Based on ip-iq method，two standard selectors are applied，which combine randomly the photovoltaic active current with the harmonic or reactive current to form the grid-connection reference current for realizing the random functional combination of active power injection，harmonic restraint and reactive power compensation. Results of the simulation with MATLAB／Simulink and the experiment based on RT-LAB verify the correctness of theoretical analysis. |
| Key words: photovoltaic power conditioner system amplitude integral reference current calculation selector power quality solar energy |
