| 引用本文: | 尹 璐,赵争鸣,贺凡波,鲁 挺,袁立强.具有高功率因数的三相光伏并网逆变器控制算法[J].电力自动化设备,2012,32(10): |
| YIN Lu,ZHAO Zhengming,HE Fanbo,LU Ting,YUAN Liqiang.Control algorithm for three-phase grid-connected photovoltaic inverter with high power factor[J].Electric Power Automation Equipment,2012,32(10): |
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| 摘要: |
| 对单级式三相光伏并网逆变器的数学模型进行了分析。在此基础上，将系统中的并网变压器作为无功负载引入控制系统，提出了基于电压定向矢量控制的对变压器吸收的无功功率进行补偿的控制算法，提高了系统输出电能的功率因数。另外，针对传统滑模频率偏移法在电网运行于非额定频率时输出功率因数下降的缺点，将滑模频率偏移算法曲线设计为二次曲线，提高了系统在非额定频率运行时的功率因数。最后通过仿真和实验，验证了上述算法的可行性和正确性。 |
| 关键词: 光伏 并网 逆变器 电压定向矢量控制 单位功率因数 孤岛检测 滑模频率偏移法 |
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| 基金项目:国家自然科学基金资助项目（50737002）；台达环境与教育基金会电力电子科教发展计划重大项目（DREM200902） |
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| Control algorithm for three-phase grid-connected photovoltaic inverter with high power factor |
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YIN Lu, ZHAO Zhengming, HE Fanbo, LU Ting, YUAN Liqiang
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State Key Lab of Control and Simulation of Power Systems and Generation Equipments，Department of Electrical Engineering，Tsinghua University，Beijing 100084，China
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| Abstract: |
| The mathematical model of the single-stage grid-connected photovoltaic inverter is analyzed for unity power factor output. The grid-connected transformer is considered as a reactive load in this model and a reactive power compensation algorithm based on voltage-oriented vector control is introduced for it. Under the control of conventional SMS（Slip-Mode frequency Shift） algorithm，the power factor output will decrease when the power system frequency deviates. Therefore，a quadratic curve is adopted in SMS algorithm. Simulations and experiments validate the feasibility and correctness of the proposed algorithm. |
| Key words: photovoltaic grid-connection electric inverters voltage-oriented vector control unity power factor islanding detection SMS |
