基于谐波阻抗的单调谐滤波器在线监测及失谐辨识
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摘要
本文提出了一种通过计算谐波阻抗实现单调谐滤波器元件参数的在线监测方法,将实时测量得到的滤波器电压和电流通过傅里叶分解,进而求得滤波器的各次谐波阻抗,结合滤波器的结构计算得到该滤波器各元件的实时参数,实现滤波器元件参数在线监测的目的。该方法无需对现有滤波器进行任何改造、计算简单、实现方便。扩展了现场电压/电流互感器的功能,并可及时准确确定滤波器的失谐元件。通过PSCAD仿真验证了所提出方法的正确性和有效性。
In this paper,a kind of on line monitoring method by the calculation of harmonic reactance to achieve the element parameters of single-tuning filter.Each harmonic impedance of the filter is obtained through Fourier decomposition of the filter voltage and current which is obtained by real time measurement,the real time parameters of each element of the filter is obtained with combination of structure calculation of the filter with purpose of on line monitoring of the element parameters of the filter.The method is simple to calculate and convenient to achieve without any modification of the existing filter.The function of voltage/current transformer at site is expanded and the detuning elements of the filter can be defined timely and accurately.The correctness and effectiveness of the proposed method is verified by the PSCAD simulation.
In this paper,a kind of on line monitoring method by the calculation of harmonic reactance to achieve the element parameters of single-tuning filter.Each harmonic impedance of the filter is obtained through Fourier decomposition of the filter voltage and current which is obtained by real time measurement,the real time parameters of each element of the filter is obtained with combination of structure calculation of the filter with purpose of on line monitoring of the element parameters of the filter.The method is simple to calculate and convenient to achieve without any modification of the existing filter.The function of voltage/current transformer at site is expanded and the detuning elements of the filter can be defined timely and accurately.The correctness and effectiveness of the proposed method is verified by the PSCAD simulation.
引文
[1]崔国强,张鹏,成小胜. 1 000kV特高压站电容器组桥差不平衡保护的应用[J].电力电容器与无功补偿,2012,33(3):49-55.CUI Guoqiang,ZHANG Peng,CHENG Xiaosheng. Application of unbalance protection of capacitor bank in 1 000kV ultra-high voltage station[J]. Power Capacitor&Reactive Power Compensation,2012,33(3):49-55.
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[9]毛涛,乐健,黄银龙,等.参数失谐对基于滤波器的高压直流输电系统直流侧谐波电压测量的影响[J].电力自动化设备,2015,31(12):95-100.MAO Tao,YUE Jian,HUANG Yinlong,et al. The influence of the parameter detuning on the AC harmonic voltage measurement based on filter[J]. Transactions of China Electrotechnical Society,2015,31(12):95-100.
[10]陈静.凃梦洁,王一飞,等.大容量无功快速补偿方法的研究[J].电力电容器与无功补偿,2017,38(6):1-6.CHEN Jing, TU Mengjie, WANG Yifei, et al. Study on high capacity reactive power fast compensation method[J]. Power Capacitor&Reactive Power Compensation,2017,38(6):1-6.
[11]黄金海,冯雷,李曼丽,等.糯扎渡送电广东特高压直流输电工程直流滤波器C1不平衡保护研究[J].电力系统保护与控制,2012,40(15):46-51.HUANG Jinhai,FENG Lei,LI Manli,et al. Study of DC filter C1unbalance protection for Nuozhadu-Guangdong ultra HVDC transmission project[J]. Power System Protection and Control,2012,40(15):46-51.
[12]王侄.特高压直流输电控制与保护技术的研究[J].电力系统保护与控制,2009,37(15):53-58.WANG Zhi. Study on the control and protection system of ultra high voltage direct current transmission[J]. Power System Protection and Control,2009,37(15):53-58.
[13]余江,周红阳,赵曼勇.高压电容器不平衡保护的相关问题[J].电力系统自动化,2006,30(13):85-89.YU Jiang,ZHOU Hongyang,ZHAO Manyong. Related problems of unbalance protection for high voltage capacitor[J].Automation of Electric Power Systems,2006,30(13):85-89.
[14]梁旭明,张平,常勇.高压直流输电技术现状及发展前景[J].电网技术,2012,36(4):1-9.LIANG Xuming,ZHANG Ping,CHANG Yong. Recent advances in high-voltage direct-current power transmission and its developing potential[J]. Power System Technology,2012,36(4):1-9.
[15]黄银龙,乐健,毛涛,等.基于谐波电流变化率的高压直流输电系统直流侧滤波器参数的在线辨识[J].电工技术学报,2016,31(6):162-170.HUANG Yinlong,YUE Jian,MAO Tao,et al. The online parameters identification of the DC-side filter of high-voltage direct current system based on harmonic current change ratio[J]. Transactions of China Electrotechnical Society,2016,31(6):162-170.
[16]罗汉武,黄银龙,姜国义,等.适用于单调谐滤波器的失谐元件在线监测方法[J].电力系统保护与控制,2015,43(1):34-39.LUO Hanwu,HUANG Yinlong,JIANG Guoyi,et al. Online identification method of detuning element of single-tuned filter[J]. Power System Protection and Control,2015,43(1):34-39.
[2]毛涛,乐健,黄银龙,等.一种新型的高压直流输电系统交流侧谐波电压测量方法[J].中国电机工程学报,2015,2(4):796-803.MAO Tao,YUE Jian,HUANG Yinlong,et al. A novel AC side harmonic voltage measurement scheme of high-voltage DC power systems[J]. Proceedings of the CSEE,2015,2(4):796-803.
[3]程江平,周全.直流滤波器保护的研究和改进[J].电力系统保护与控制,2011,39(4):105-109.CHENG Jiangping,ZHOU Quan. Study and improvement of DC filter protection[J]. Power System Protection and Control,2011,39(4):105-109.
[4]黄银龙,乐健,毛涛,等.一种新型的高压直流输电系统直流侧谐波电压测量方法[J].电工技术学报,2015,30(22):144-152.HUANG Yinlong,YUE Jian,MAO Tao,et al. A novel measurement method of the harmonic voltage on the DC-side of HVDC transmission system[J]. Transactions of China Electrotechnical Society,2015,30(22):144-152.
[5]瞿绪龙,王恒,陈颖.简析集成式无功补偿装置的技术特点[J].电力电容器与无功补偿,2015,36(2):15-18.QU Xulong,WANG Heng,CHEN Ying. Brief analysis on the technical characteristics of integrated reactive compensation installation[J]. Power Capacitor&Reactive Power Compensation,2015,36(2):15-18.
[6]李勇,罗隆福,贺达江,等.新型直流输电系统典型谐波分布特性分析[J].电力系统自动化,2009,33(10):59-63.LI Yong,LUO Longfu,HE Dajiang,et al. Analysis of harmonic distribution characteristics of a new DC transmission system[J]. Automation of Electric Power Systems,2009,33(10):59-63.
[7]罗隆福,李勇,刘福生,等.基于新型换流变压器的直流输电系统滤波装置[J].电工技术学报,2006,21(12):108-115.LUO Longfu,LI Yong,LIU Fusheng,et al. Design of HVDC filter device based on new-type converter transformer[J]. Transactions of China Electrotechnical Society,2006,21(12):108-115.
[8]赫巍,李兴源,金小明,等.直流输电引起的谐波不稳定及其相关问题[J].电力系统自动化,2006,30(19):94-99.HE Wei,LI Xingyuan,JIN Xiaoming,et al. A survey ifharmonic instability and related problem caused by HVDC[J].Automation of Electric Power Systems,2006,30(19):94-99.
[9]毛涛,乐健,黄银龙,等.参数失谐对基于滤波器的高压直流输电系统直流侧谐波电压测量的影响[J].电力自动化设备,2015,31(12):95-100.MAO Tao,YUE Jian,HUANG Yinlong,et al. The influence of the parameter detuning on the AC harmonic voltage measurement based on filter[J]. Transactions of China Electrotechnical Society,2015,31(12):95-100.
[10]陈静.凃梦洁,王一飞,等.大容量无功快速补偿方法的研究[J].电力电容器与无功补偿,2017,38(6):1-6.CHEN Jing, TU Mengjie, WANG Yifei, et al. Study on high capacity reactive power fast compensation method[J]. Power Capacitor&Reactive Power Compensation,2017,38(6):1-6.
[11]黄金海,冯雷,李曼丽,等.糯扎渡送电广东特高压直流输电工程直流滤波器C1不平衡保护研究[J].电力系统保护与控制,2012,40(15):46-51.HUANG Jinhai,FENG Lei,LI Manli,et al. Study of DC filter C1unbalance protection for Nuozhadu-Guangdong ultra HVDC transmission project[J]. Power System Protection and Control,2012,40(15):46-51.
[12]王侄.特高压直流输电控制与保护技术的研究[J].电力系统保护与控制,2009,37(15):53-58.WANG Zhi. Study on the control and protection system of ultra high voltage direct current transmission[J]. Power System Protection and Control,2009,37(15):53-58.
[13]余江,周红阳,赵曼勇.高压电容器不平衡保护的相关问题[J].电力系统自动化,2006,30(13):85-89.YU Jiang,ZHOU Hongyang,ZHAO Manyong. Related problems of unbalance protection for high voltage capacitor[J].Automation of Electric Power Systems,2006,30(13):85-89.
[14]梁旭明,张平,常勇.高压直流输电技术现状及发展前景[J].电网技术,2012,36(4):1-9.LIANG Xuming,ZHANG Ping,CHANG Yong. Recent advances in high-voltage direct-current power transmission and its developing potential[J]. Power System Technology,2012,36(4):1-9.
[15]黄银龙,乐健,毛涛,等.基于谐波电流变化率的高压直流输电系统直流侧滤波器参数的在线辨识[J].电工技术学报,2016,31(6):162-170.HUANG Yinlong,YUE Jian,MAO Tao,et al. The online parameters identification of the DC-side filter of high-voltage direct current system based on harmonic current change ratio[J]. Transactions of China Electrotechnical Society,2016,31(6):162-170.
[16]罗汉武,黄银龙,姜国义,等.适用于单调谐滤波器的失谐元件在线监测方法[J].电力系统保护与控制,2015,43(1):34-39.LUO Hanwu,HUANG Yinlong,JIANG Guoyi,et al. Online identification method of detuning element of single-tuned filter[J]. Power System Protection and Control,2015,43(1):34-39.