电网畸变不平衡条件下基于MAF-ANF的谐波检测方法研究
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摘要
有源电力滤波器(Active Power Filter,APF)补偿电流检测环节对其补偿性能有着重要的影响。三相电网电压不对称且畸变时,传统的p-q法和i_p-i_q法无法准确实现对负荷综合补偿。为此文中引入基于滑动平均滤波器-自适应陷波滤波器(MAF-ANF)的方法实现对非理想电网电压条件下网侧电压的处理,得到平衡无畸变的电网电压,并对负载电流处理,得到准确的基波电流正序分量。然后对传统p-q法进行改进,得到了基于MAF-ANF的谐波检测方法,该方法较传统方法谐波检测精度提高,取得了更好的补偿效果。最后通过Simulink仿真证明了在非理想电网电压条件下所提检测算法的正确性和有效性。
The detection of compensation current has an important impact on the performance of active power filter. The traditional method of p-q and ip-iqcannot be accurately achieve the comprehensive compensation of load with the unbalanced and distorted three-phase voltage. In this paper,the method based on MAF-ANF is introduced which processes the distorted grid voltage in order to obtain an undistorted and balanced voltage. The load current is also processed to get the correct fundamental positive component. The traditional p-q method is improved,and the harmonic detection method based on MAF-ANF is deduced. This method improves the accuracy of harmonics detection and obtains better compensation effect. Finally,the correctness and effectiveness of the proposed detection algorithm under the condition of non-ideal grid voltage are proved by Simulink simulation.
The detection of compensation current has an important impact on the performance of active power filter. The traditional method of p-q and ip-iqcannot be accurately achieve the comprehensive compensation of load with the unbalanced and distorted three-phase voltage. In this paper,the method based on MAF-ANF is introduced which processes the distorted grid voltage in order to obtain an undistorted and balanced voltage. The load current is also processed to get the correct fundamental positive component. The traditional p-q method is improved,and the harmonic detection method based on MAF-ANF is deduced. This method improves the accuracy of harmonics detection and obtains better compensation effect. Finally,the correctness and effectiveness of the proposed detection algorithm under the condition of non-ideal grid voltage are proved by Simulink simulation.
引文
[1]王兆安.谐波抑制和无功功率补偿[M].北京:机械工业出版社,2016.
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[10]赵贵龙,曹玲玲,祝龙记.基于光伏并网逆变系统的改进锁相环设计[J].电力系统保护与控制,2015,43(2):108-112.Zhao Guilong,Cao Lingling,Zhu Longji.Improved PLL design of PVgrid inverter system[J].Power System Protection and Control,2015,43(2):108-112.
[11]Yazdani D,Mojiri M,Bakhshai A,et al.A fast and accurate synchronization technique for extraction of symmetrical components[J].IEEETransactions on Power Electronics,2009,24(3):674-684.
[12]Dinh N D,Tuyen N D,Fujita G,et al.Adaptive notch filter solution under unbalanced and/or distorted point of common coupling voltage for three-phase four-wire shunt active power filter with sinusoidal utility current strategy[J].IET Generation,Transmission&Distribution,2015,9(13):1580-1596.
[13]Robles E,Pou J,Ceballos S,et al.Frequency-adaptive stationary-reference-frame grid voltage sequence detector for distributed generation systems[J].IEEE Transactions on Industrial Electronics,2011,58(9):4275-4287.
[14]吴晓波,赵仁德,马帅.电网畸变条件下基于滑动平均-自适应陷波滤波器的基波相位提取[J].电网技术,2013,37(12):3528-3533.Wu Xiaobo,Zhao Rende,Ma Shuai.Fundamental phase extraction based on moving average-adaptive notch filter under distorted grid conditions[J].Power System Technology,2013,37(12):3528-3533.
[2]王璐,唐杰,耿运涛,等.非理想电网电压情况下有源电力滤波器补偿电流检测技术研究[J].仪表技术,2014,(12).Wang Lu,Tang Jie,Geng Yuntao,et al.Research on Compensation Current Detection Technology of Active Power Filter in Non-ideal Voltage of Electrified Wire Netting[J].Instrumentation Technology,2014.
[3]徐海亮,章玮,胡家兵,等.电网电压不平衡及谐波畸变时基波电压同步信号的检测[J].电力系统自动化,2012,36(5):90-95.Xu Hailiang,Zhang Wei,Hu Jiabing,et al.Synchronizing Signal Detection of Fundamental Voltage Under Unbalanced and/or Distorted Grid Voltage Conditions[J].Automation of Electric Power Systems,2012,36(5):90-95.
[4]张培远,高晓军,董晓岽.基于正序基波提取器定向的Adaline谐波电流检测[J].电测与仪表,2013,50(7):35-40.Zhang Peiyuan,Gao Xiaojun,Dong Xiaodong.Harmonic Detecting Based on Adaptive Linear Neural Network with Positive Sequence Fundamental Extractor Orientation[J].Electrical Measurement&Instrumentation,2013,50(7):35-40.
[5]游小杰,李永东,Victor Valouch,等.并联型有源电力滤波器在非理想电源电压下的控制[J].中国电机工程学报,2004,24(2):55-60.You Xiaojie,Li Yongdong,Victor Valouch,et al.SAPF Control Strategy Under The Condition of Non-ideal Source Voltages[J].Proceedings of the CSEE,2004,24(2):55-60.
[6]陈东华,谢少军,周波.用于有源电力滤波器谐波和无功电流检测的一种改进同步参考坐标法[J].中国电机工程学报,2005,25(20):62-67.Chen Donghua,Xie Shaojun,Zhou Bo.An Improved Synchronous Reference Frame Method For Harmonics And Reactive Currents Detection of Active Power Filters[J].Proceedings of the CSEE,2005,25(20):62-67.
[7]Kale M,Ozdemir E.Harmonic and reactive power compensation with shunt active power filter under non-ideal mains voltage[J].Electric Power Systems Research,2005,74(3):363-370.
[8]Ucar M,Ozdemir E.Control of a 3-phase 4-leg active power filter under non-ideal mains voltage condition[J].Electric Power Systems Research,2008,78(1):58-73.
[9]Biricik S,Redif S,Ozerdem O C,et al.Real-time control of shunt active power filter under distorted grid voltage and unbalanced load condition using self-tuning filter[J].IET Power Electronics,2014,7(7):1895-1905.
[10]赵贵龙,曹玲玲,祝龙记.基于光伏并网逆变系统的改进锁相环设计[J].电力系统保护与控制,2015,43(2):108-112.Zhao Guilong,Cao Lingling,Zhu Longji.Improved PLL design of PVgrid inverter system[J].Power System Protection and Control,2015,43(2):108-112.
[11]Yazdani D,Mojiri M,Bakhshai A,et al.A fast and accurate synchronization technique for extraction of symmetrical components[J].IEEETransactions on Power Electronics,2009,24(3):674-684.
[12]Dinh N D,Tuyen N D,Fujita G,et al.Adaptive notch filter solution under unbalanced and/or distorted point of common coupling voltage for three-phase four-wire shunt active power filter with sinusoidal utility current strategy[J].IET Generation,Transmission&Distribution,2015,9(13):1580-1596.
[13]Robles E,Pou J,Ceballos S,et al.Frequency-adaptive stationary-reference-frame grid voltage sequence detector for distributed generation systems[J].IEEE Transactions on Industrial Electronics,2011,58(9):4275-4287.
[14]吴晓波,赵仁德,马帅.电网畸变条件下基于滑动平均-自适应陷波滤波器的基波相位提取[J].电网技术,2013,37(12):3528-3533.Wu Xiaobo,Zhao Rende,Ma Shuai.Fundamental phase extraction based on moving average-adaptive notch filter under distorted grid conditions[J].Power System Technology,2013,37(12):3528-3533.