非线性负荷谐波传导的谐波系数算法与验证
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摘要
谐波在电网侧的污染量不仅取决于非线性负荷发射,更与谐波在整个系统中的传导息息相关,而目前关于谐波传导评估多采用直接的平均电流放大公式,并没有深入的研究不同谐波频次的综合影响,也鲜有明确的谐波系数算法。本文基于Parseval等式——Rayleigh能量定理,考虑谐波旁瓣频次,提出了一种针对非线性负荷谐波传导的谐波系数算法,弥补了根据单谱线平均电流放大倍数衡量谐波传导的不足。给出了基于非线性负荷的MATLAB仿真计算实例,并在EAST实验中通过与实测数据对比验证了其正确性。
The harmonic pollution on the power grid depends not only on the generation of nonlinear thyristor-based converter load,but also on the amplification of harmonics throughout the reactive power compensation system.At present,the harmonic current amplification formula is often used for the conduction evaluation,but it is difficult to characterize the mechanism of the whole spectrum conduction.Based on the Parseval-Rayleigh energy theorem criterion,a harmonic coefficient algorithm for nonlinear load is proposed.The calculation example of harmonic coefficient for the nonlinear load by MATLAB is analysed,and the correctness is validated by comparing with the measured data in the EAST experiment.
The harmonic pollution on the power grid depends not only on the generation of nonlinear thyristor-based converter load,but also on the amplification of harmonics throughout the reactive power compensation system.At present,the harmonic current amplification formula is often used for the conduction evaluation,but it is difficult to characterize the mechanism of the whole spectrum conduction.Based on the Parseval-Rayleigh energy theorem criterion,a harmonic coefficient algorithm for nonlinear load is proposed.The calculation example of harmonic coefficient for the nonlinear load by MATLAB is analysed,and the correctness is validated by comparing with the measured data in the EAST experiment.
引文
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[9]陈勇,李鹏,宋树平,等.五项最小旁瓣窗插值方法电力谐波参数估计[J].自动化仪表,2017,38(4):46-49,54.(Chen Yong,Li Peng,Song Shuping,et al.Interpolation method of 5-term minimum sidelobe window for parameter estimation of power harmonics.Process Automation Instrumentation,2017,38(4):46-49,54)
[10]何诗英,黄连生,高格,等.基于实时Linux的极向场电源主控制系统的设计[J].核聚变与等离子体物理,2018,38(1):93-98.(He Shiying,Huang Liansheng,Gao Ge,et al.Design of master control system for poloidal field power supply based on real-time Linux.Nuclear Fusion and Plasma Physics,2018,38(1):93-98)
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[13]戴珂,刘聪,李彦龙,等.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.(Dai Ke,Liu Cong,Li Yanlong,et al.Study on harmonic compensation characteristics of shunt APF to two types of nonlinear loads.Transactions of China Electrotechnical Society,2013,28(9):79-85)
[14]Wu Yanan,Ji Yue,Xu Liuwei,et al.Optimization for Tokamak reactive power compensation and filtering system[J].Journal of Fusion Energy,2015,34(1):54-61.
[15]Li Jinchao,Song Zhiquan,Xu Liuwei,et al.Current sharing analysis of arm prototype for ITER PF converter bridge[J].Plasma Science and Technology,2014,16(3):283-287.
[2]徐玉琴,李文帅,赵蓓蓓.一种大电源接入电网接入点选取合理性的评估方法[J].电力系统保护与控制,2017,45(12):94-100.(Xu Yuqin,Li Wenshuai,Zhao Beibei.An evaluation method for the rationality of the voltage level of a large power supply connected to the power network.Power System Protection and Control,2017,45(12):94-100)
[3]王兆安,杨君,刘进军,等.谐波抑制和无功功率补偿[M].北京:机械工业出版社,2010.(Wang Zhaoan,Yang Jun,Liu Jinjun,et al.Harmonic suppression and reactive power compensation.Beijing:China Machine Press,2010)
[4]肖湘宁,廖坤玉,唐松浩,等.配电网电力电子化的发展和超高次谐波新问题[J].电工技术学报,2018,33(4):707-720.(Xiao Xiangning,Liao Kunyu,Tang Songhao,et al.Development of power-electronized distribution grids and the new supraharmonics issues.Transactions of China Electrotechnical Society,2018,33(4):707-720)
[5]Garanayak P,Panda G.Fast and accurate measurement of harmonic parameters employing hybrid adaptive linear neural network and filteredx least mean square algorithm[J].Iet Generation Transmission &Distribution,2016,10(2):421-436.
[6]朱明星,胡贺军,陈兵,等.中频电源间谐波发射特性机理研究[J].电源学报,2015,13(5):41-47.(Zhu Mingxing,Hu Hejun,Chen Bing,et al.Study on inter-harmonics emission characteristics of medium-frequency power supply.Journal of Power Supply,2015,13(5):41-47)
[7]熊杰锋,李群,袁晓冬,等.电力系统谐波和间谐波检测方法综述[J].电力系统自动化,2013,37(11):125-133.(Xiong Jiefeng,Li Qun,Yuan Xiaodong,et al.Detection methods of harmonics and Inter-harmonics in power systems.Automation of Electric Power Systems,2013,37(11):125-133)
[8]张俊敏,刘开培,汪立,等.基于乘法窗函数的插值FFT的谐波分析方法[J].电力系统保护与控制,2016,44(13):1-5.(Zhang Junmin,Liu Kaipei,Wang Li,et al.An algorithm for harmonic analysis based on multiplication window function.Power System Protection and Control,2016,44(13):1-5)
[9]陈勇,李鹏,宋树平,等.五项最小旁瓣窗插值方法电力谐波参数估计[J].自动化仪表,2017,38(4):46-49,54.(Chen Yong,Li Peng,Song Shuping,et al.Interpolation method of 5-term minimum sidelobe window for parameter estimation of power harmonics.Process Automation Instrumentation,2017,38(4):46-49,54)
[10]何诗英,黄连生,高格,等.基于实时Linux的极向场电源主控制系统的设计[J].核聚变与等离子体物理,2018,38(1):93-98.(He Shiying,Huang Liansheng,Gao Ge,et al.Design of master control system for poloidal field power supply based on real-time Linux.Nuclear Fusion and Plasma Physics,2018,38(1):93-98)
[11]朱明星,夏勇,孙贺,等.电容滤波型三相桥式整流电路谐波叠加[J].电力系统及其自动化学报,2017,29(11):75-80.(Zhu Mingxing,Xia Yong,Sun He,et al.Superposition of harmonics in capacitor-filtered three-phase-bridge rectifier circuit.Proceedings of the CSU-EPSA,2017,29(11):75-80)
[12]肖雁鸿,毛筱,周靖林,等.电力系统谐波测量方法综述[J].电网技术,2002,26(6):61-64.(Xiao Yanhong,Mao Xiao,Zhou Jinglin,et al.A survey on measuring method for harmonic in power system.Power System Technology,2002,26(6):61-64)
[13]戴珂,刘聪,李彦龙,等.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.(Dai Ke,Liu Cong,Li Yanlong,et al.Study on harmonic compensation characteristics of shunt APF to two types of nonlinear loads.Transactions of China Electrotechnical Society,2013,28(9):79-85)
[14]Wu Yanan,Ji Yue,Xu Liuwei,et al.Optimization for Tokamak reactive power compensation and filtering system[J].Journal of Fusion Energy,2015,34(1):54-61.
[15]Li Jinchao,Song Zhiquan,Xu Liuwei,et al.Current sharing analysis of arm prototype for ITER PF converter bridge[J].Plasma Science and Technology,2014,16(3):283-287.
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