| 光伏并网系统中的无功及谐波电流检测与补偿 |
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| 引用本文： | 杨立永,王周龙,田红芳.光伏并网系统中的无功及谐波电流检测与补偿[J].北方工业大学学报,2011,23(1):48-55. |
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| 作者姓名： | 杨立永 王周龙 田红芳 |
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| 作者单位： | 北方工业大学电力电子与电气传动工程中心,100144,北京;北方工业大学电力电子与电气传动工程中心,100144,北京;北方工业大学电力电子与电气传动工程中心,100144,北京 |
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| 摘 要： | 介绍了基于瞬时无功理论的p-q方法.应用此方法从非线性负载电流中提取出无功和谐波电流分量之和,将该电流分量作为光伏并网逆变器的电流给定.逆变器的实际输出电流作为反馈,通过电流无差拍控制的PWM方法,使得光伏并网逆变器能够补偿本地负载的无功和谐波电流.使电网摆脱了向负载提供无功,并使谐波电流减少,从而避免了非线性负载引起的电流波形畸变对电网造成的污染,并增强了电力系统的稳定性.最后给出了仿真实验结果,验证了理论的可行性以及电流无差拍控制的快速性.
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| 关 键 词： | 光伏并网 无功补偿 谐波电流 |
Detection and Compensation of Reactive and Harmonic Currents for Photovoltaic Grid-connected System |
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| Yang Liyong,Wang Zhoulong,Tian Hongfang.Detection and Compensation of Reactive and Harmonic Currents for Photovoltaic Grid-connected System[J].Journal of North China University of Technology,2011,23(1):48-55. |
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| Authors: | Yang Liyong Wang Zhoulong Tian Hongfang |
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| Affiliation: | Yang Liyong Wang Zhoulong Tian Hongfang(Power Electronics and Electrical Drivers Engineering Center,North China Univ.of Tech.,100144,Beijing,China) |
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| Abstract: | The p-q method based on instantaneous reactive power theory is introduced.By means of this method,the sum of the components of reactive and harmonic currents is extracted from the nonlinear local current,which serves as the reference current value for photovoltaic grid-connected inverter,and the actual output current value of the inverter serves as the feedback.According to the PWM method of current deadbeat control,the inverter compensates the reactive and harmonic currents of local load,and frees the powe... |
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| Keywords: | photovoltaic grid-connected reactive power compensation harmonic current |
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