应用串联校正解决有源滤波器稳定性问题
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摘要
分析了系统电抗和负荷电抗对基于检测系统电流的并联型有源滤波器(APF)控制算法稳定性的影响,并给出了基于串联校正的解决方案。对于电压源型非线性负载,由于系统电抗和负荷电抗的影响,在使用并联型APF进行谐波补偿时不但会出现谐波放大现象,而且影响并联型APF电流跟踪控制算法的稳定性。建立了并联型APF,系统电抗和负荷电抗的详细电路模型,并通过闭环传递函数控制模型分析了电流跟踪控制算法的稳定性。使用比例谐振(PR)控制验证了该数学模型的合理性,并提出了串联校正解决方案,实验结果验证了该模型和解决方案的正确性。
A detail circuit model based on voltage source type harmonic source is built for shunt active power filter(APF)considering the line impedance, and the stability problem caused by harmonic amplification based on close loop transfer function is analyzed according to this circuit model.In order to verify this stability problem,proportional resonance(PR)controller based on series correction scheme is proposed to solve this stability problem caused by harmonic amplification.The experimental results confirm the validity of the circuit model,and prove that harmonic amplification will produce stability problem for voltage source type harmonic source.
A detail circuit model based on voltage source type harmonic source is built for shunt active power filter(APF)considering the line impedance, and the stability problem caused by harmonic amplification based on close loop transfer function is analyzed according to this circuit model.In order to verify this stability problem,proportional resonance(PR)controller based on series correction scheme is proposed to solve this stability problem caused by harmonic amplification.The experimental results confirm the validity of the circuit model,and prove that harmonic amplification will produce stability problem for voltage source type harmonic source.
引文
[1] Pengpai Dang,Thomas Ellinger,Jurgen Petzlodt.Dynanmic Interaction Anslysis of APF Systems[J].IEEE Trans. on Industrial Electronics,2014,61(9):4467-4474.
[2]戴珂,刘聪,李彦龙.并联型APF对两类非线性负载的谐波补偿特性研究[J].电工技术学报,2013,28(9):79-85.
[3]任磊,姜齐荣.基于傅里叶级数的多时间尺度同步旋转坐标系电流跟踪控制方案[J].电工技术学报,2017,32(14):45-55.
[4] Wu Wei-min,Liu Yuan,He Yuan-bin.Damjping Methods for Resonances Caused by LCL-Filter-Based Currentcontrolled Grid-Tied Power Inverters:An Overvies[J].IEEE Trans. on Industrial Electronics, 2017,64(9):7402-7416.
[5] Li Xiao-qing, Fang Jing-yang, Tang Yi.Capactor-voltage Feedforward With Full Delay Compensation to Improve Weak Grids Adapatability of LCL-filter Grid-connected Converters for Distributed Generation Systems[J]. IEEE Trans. on Power Electronics,2018,33(1):749-754.
[6]任磊,姜齐荣,魏应冬.有源滤波器对电压源型非线性负荷稳定性分析[J].电力电子技术,2016,50(10):52-56.
[2]戴珂,刘聪,李彦龙.并联型APF对两类非线性负载的谐波补偿特性研究[J].电工技术学报,2013,28(9):79-85.
[3]任磊,姜齐荣.基于傅里叶级数的多时间尺度同步旋转坐标系电流跟踪控制方案[J].电工技术学报,2017,32(14):45-55.
[4] Wu Wei-min,Liu Yuan,He Yuan-bin.Damjping Methods for Resonances Caused by LCL-Filter-Based Currentcontrolled Grid-Tied Power Inverters:An Overvies[J].IEEE Trans. on Industrial Electronics, 2017,64(9):7402-7416.
[5] Li Xiao-qing, Fang Jing-yang, Tang Yi.Capactor-voltage Feedforward With Full Delay Compensation to Improve Weak Grids Adapatability of LCL-filter Grid-connected Converters for Distributed Generation Systems[J]. IEEE Trans. on Power Electronics,2018,33(1):749-754.
[6]任磊,姜齐荣,魏应冬.有源滤波器对电压源型非线性负荷稳定性分析[J].电力电子技术,2016,50(10):52-56.