基于双闭环控制的配电网单相接地故障有源消弧方法
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摘要
阐述了配电网单相接地故障有源消弧机理,提出了一种基于双闭环控制的有源消弧方法,在配电网发生故障时,通过向中性点注入可控零序电流,控制故障相电压为零,实现故障消弧。该方法由中性点电压外环和输出电流内环构成,外环输出结果作为内环的参考信号,分别以比例—谐振(PR)和比例—积分(PI)作为控制器,并分析了内外环控制器的稳定性。仿真和实验结果表明该方法具有良好的稳态和动态性能,无需测量配电网电容电流等阻抗参数,能实现故障点电流的快速、高精度抑制。
The active arc-suppression mechanism under single-phase grounding faults in distribution networks is described.And an active arc-suppression method based on double closed-loop control is proposed.When the single-phase grounding fault occurs,the inverter device injects zero-sequence current into the neutral point to force the faulted phase voltage to zero,and the fault arcs can thus be reliably extinguished.The control system consists of a neutral voltage outer-loop and an injecting current inner-loop using aproportional-integral(PI)controller and proportional-resonant(PR)controller each,respectively.The output of the outer-loop is used as the reference signal for the inner-loop.The stability of the outer-loop and that of the innerloop controllers are analyzed.Simulation analysis and prototype testing results show that the system has good steady-state and transient response performance,and is able to quickly and precisely suppress the fault current without measuring the impedance parameters of the distribution network.
The active arc-suppression mechanism under single-phase grounding faults in distribution networks is described.And an active arc-suppression method based on double closed-loop control is proposed.When the single-phase grounding fault occurs,the inverter device injects zero-sequence current into the neutral point to force the faulted phase voltage to zero,and the fault arcs can thus be reliably extinguished.The control system consists of a neutral voltage outer-loop and an injecting current inner-loop using aproportional-integral(PI)controller and proportional-resonant(PR)controller each,respectively.The output of the outer-loop is used as the reference signal for the inner-loop.The stability of the outer-loop and that of the innerloop controllers are analyzed.Simulation analysis and prototype testing results show that the system has good steady-state and transient response performance,and is able to quickly and precisely suppress the fault current without measuring the impedance parameters of the distribution network.
引文
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[14]谢菁,薛永端,徐丙垠.小电流接地系统不对称电压有源补偿控制方法[J].电力系统自动化,2015,39(5):115-121.DOI:10.7500/AEPS20140303006.XIE Jing,XUE Yongduan,XU Bingyin.An active compensation and control method of asymmentrical voltage in non-solidly grounded system[J].Automation of Electric Power Systems,2015,39(5):115-121.DOI:10.7500/AEPS20140303006.
[15]张小凤,王孝洪,田联房,等.基于分数阶PIλ控制器的有源电力滤波器直流侧电压控制[J].电力系统自动化,2013,37(16):108-113.ZHANG Xiaofeng,WANG Xiaohong,TIAN Lianfang,et al.DC Voltage control of active filter based on fractional-order PIλcontroller[J].Automation of Electric Power Systems,2013,37(16):108-113.
[16]乔鸣忠,夏益辉,梁京辉,等.基于重复PI的复合控制应用于并联有源滤波器研究[J].电力系统保护与控制,2013,41(14):54-59.QIAO Mingzhong,XIA Yihui,LIANG Jinghui,et al.Research on PI control based compound controller applying to shunt active filter[J].Power System Protection and Control,2013,41(14):54-59.
[17]殷自力,梁海峰,李庚银,等.基于模糊自适应PI控制的柔性直流输电系统实验研究[J].电力自动化设备,2008,28(7):49-53.YIN Zili,LIANG Haifeng,LI Gengyin,et al.Exper imental study of VSC-HVDC under fuzzy adaptive PI control[J].Electric Power Automation Equipment,2008,28(7):49-53.
[18]李新泉,齐郑,杨以涵.消弧线圈与接地故障转移装置配合使用的消弧方法[J].电力系统自动化,2008,32(19):71-75.LI Xinquan,QI Zheng,YANG Yihan.Arc-suppression method for coordinated using of arc-extinguish coil with grounded-fault transfer device[J].Automation of Electric Power Systems,2008,32(19):71-75.
[19]王恩德,黄声华.三相电压型PWM整流的新型双闭环控制策略[J].中国电机工程学报,2012,32(15):24-30.WANG Ende,HUANG Shenghua.A novel double closed loops control of the three-phase voltage-sourced PWM rectifier[J].Proceedings of the CSEE,2012,32(15):24-30.
[20]李峰,徐丙垠,颜廷纯.电弧反射法电缆故障测距中的电弧建模与仿真[J].电力系统自动化,2014,38(11):104-108.DOI:10.7500/AEPS20130422004.LI Feng,XU Bingyin,YAN Tingchun.Arc modeling and simulation of arc reflection method for cable fault location[J].Automation of Electric Power Systems,2014,38(11):104-108.DOI:10.7500/AEPS20130422004.
[21]顾荣斌,蔡旭,陈海昆,等.非有效接地电网单相电弧接地故障的建模及仿真[J].电力系统自动化,2009,33(13):63-67.GU Rongbin,CAI Xu,CHEN Haikun,et al.Modeling and Simulating of single-phase arc grounding fault in noneffectiveearthed networks[J].Automation of Electric Power Systems,2009,33(13):63-67.
[22]薛永端,高旭,苏永智,等.小电流接地故障谐波分析及其对谐波选线的影响[J].电力系统自动化,2011,35(6):60-64.XUE Yongduan,GAO Xu,SU Yongzhi,et al.Analysis of harmonic in non-solidly earthed network and its influences on harmonic-based earth fault protection[J].Automation of Electric Power Systems,2011,35(6):60-64.
[2]马琳,金新民,唐芬,等.三相并网逆变器比例谐振控制及其网压前馈问题分析[J].电工技术学报,2012,27(8):56-63.MA Lin,JIN Xinmin,TANG Fen,et al.Analysis of threephase grid-connected inverter proportional resonant control and grid voltage feed-forward[J].Transactions of China Electrotechnical Society,2012,27(8):56-63.
[3]李达义,孙玉鸿,熊博,等.一种并联型有源电力滤波器的新型控制方法[J].电力系统自动化,2014,38(15):112-117.DOI:10.7500/AEPS20131030009.LI Dayi,SUN Yuhong,XIONG Bo,et al.A novel control method for shunt active power filter[J].Automation of Electric Power Systems,2014,38(15):112-117.DOI:10.7500/AEPS20131030009.
[4]陈炜,陈成,宋战锋,等.双馈风力发电系统双PWM变换器比例谐振控制[J].中国电机工程学报,2009,29(15):1-7.CHEN Wei,CHEN Cheng,SONG Zhanfeng,et al.Proportional-resonant control for dual PWM converter n doubly fed wind generation system[J].Proceedings of the CSEE,2009,29(15):1-7.
[5]唐欣,张武其,曾祥君.柔性直流输电系统的谐振问题及主动抑制方法[J].中国电机工程学报,2014,34(30):5352-5359.TANG Xin,ZHANG Wuqi,ZENG Xiangjun.Resonance problem analysis and active suppression method for VSC-HVDCtransmission system[J].Proceedings of the CSEE,2014,34(30):5352-5359.
[6]曾祥君,王媛媛,李建,等.基于配电网柔性接地控制的故障消弧与馈线保护新原理[J].中国电机工程学报,2012,32(16):137-143.ZENG Xiangjun,WANG Yuanyuan,LI Jian,et al.Novel principle of faults arc extinguishing&feeder protection based on flexible grounding control for distribution networks[J].Proceedings of the CSEE,2012,32(16):137-143.
[7]王萌,施艳艳,沈明辉.电网不对称故障下PWM整流器输入输出功率谐振控制[J].高电压技术,2014,40(2):597-603.WANG Meng,SHI Yanyan,SHEN Minghui.Input and output power resonance control strategy for PWM rectifiers under asymmetrical grid voltage faults[J].High Voltage Engineering,2014,40(2):597-603.
[8]FU Zhouxing,WANG Nan,HUANG Lingling,et al.Study on neutral point grounding modes in medium-voltage distribution network[C]//International Symposium on Computer,Consumer and Control(IS3C),June 10-12,2014,Taiwan,China:154-157.
[9]黄伟煌,付勋波,林资旭,等.LC滤波电压源型逆变器闭环控制策略综合对比与设计[J].电力系统自动化,2013,37(19):110-115.HUANG Weihuang,FU Xunbo,LIN Zixu,et al.Generalized analysis and design of closed-loop control strategies for LC-filtered voltage source inverters[J].Automation of Electric Power Systems,2013,37(19):110-115.
[10]XIN Yechun,LI Guoqing,WANG Yao,et al.The compensation control of reactive power and three phase unbalance load based on the method of sequence component[C]//China International Conference on Electricity Distribution(CICED),September 10-14,2012,Shanghai,China:5p.
[11]唐杰,罗安,欧剑波,等.配电静止同步补偿器的模糊自适应PI控制策略[J].电工技术学报,2008,23(2):120-126.TANG Jie,LUO An,OU Jianbo,et al.Voltage control strategy of D-STATCOM based on fuzzy-PI controller[J].Transactions of China Electrotechnical Society,2008,23(2):120-126.
[12]班明飞,申科,王建赜,等.基于准比例谐振控制的MMC新型环流抑制器[J].电力系统自动化,2014,38(11):85-89.DOI:10.7500/AEPS20130305005.BAN Mingfei,SHEN Ke,WANG Jianze,et al.A novel circulating current suppressor for modular multilevel converters based on quasi-proportional-resonant control[J].Automation of Electric Power Systems,2014,38(11):85-89.DOI:10.7500/AEPS20130305005.
[13]杨秋霞,梁雄国,郭小强,等.准谐振控制器在有源电力滤波器中的应用[J].电工技术学报,2009,24(7):171-176.YANG Qiuxia,LIANG Xiongguo,GUO Xiaoqiang,et al.Application of quasi resonant controller for active power filter[J].Transactions of China Electrotechnical Society,2009,24(7):171-176.
[14]谢菁,薛永端,徐丙垠.小电流接地系统不对称电压有源补偿控制方法[J].电力系统自动化,2015,39(5):115-121.DOI:10.7500/AEPS20140303006.XIE Jing,XUE Yongduan,XU Bingyin.An active compensation and control method of asymmentrical voltage in non-solidly grounded system[J].Automation of Electric Power Systems,2015,39(5):115-121.DOI:10.7500/AEPS20140303006.
[15]张小凤,王孝洪,田联房,等.基于分数阶PIλ控制器的有源电力滤波器直流侧电压控制[J].电力系统自动化,2013,37(16):108-113.ZHANG Xiaofeng,WANG Xiaohong,TIAN Lianfang,et al.DC Voltage control of active filter based on fractional-order PIλcontroller[J].Automation of Electric Power Systems,2013,37(16):108-113.
[16]乔鸣忠,夏益辉,梁京辉,等.基于重复PI的复合控制应用于并联有源滤波器研究[J].电力系统保护与控制,2013,41(14):54-59.QIAO Mingzhong,XIA Yihui,LIANG Jinghui,et al.Research on PI control based compound controller applying to shunt active filter[J].Power System Protection and Control,2013,41(14):54-59.
[17]殷自力,梁海峰,李庚银,等.基于模糊自适应PI控制的柔性直流输电系统实验研究[J].电力自动化设备,2008,28(7):49-53.YIN Zili,LIANG Haifeng,LI Gengyin,et al.Exper imental study of VSC-HVDC under fuzzy adaptive PI control[J].Electric Power Automation Equipment,2008,28(7):49-53.
[18]李新泉,齐郑,杨以涵.消弧线圈与接地故障转移装置配合使用的消弧方法[J].电力系统自动化,2008,32(19):71-75.LI Xinquan,QI Zheng,YANG Yihan.Arc-suppression method for coordinated using of arc-extinguish coil with grounded-fault transfer device[J].Automation of Electric Power Systems,2008,32(19):71-75.
[19]王恩德,黄声华.三相电压型PWM整流的新型双闭环控制策略[J].中国电机工程学报,2012,32(15):24-30.WANG Ende,HUANG Shenghua.A novel double closed loops control of the three-phase voltage-sourced PWM rectifier[J].Proceedings of the CSEE,2012,32(15):24-30.
[20]李峰,徐丙垠,颜廷纯.电弧反射法电缆故障测距中的电弧建模与仿真[J].电力系统自动化,2014,38(11):104-108.DOI:10.7500/AEPS20130422004.LI Feng,XU Bingyin,YAN Tingchun.Arc modeling and simulation of arc reflection method for cable fault location[J].Automation of Electric Power Systems,2014,38(11):104-108.DOI:10.7500/AEPS20130422004.
[21]顾荣斌,蔡旭,陈海昆,等.非有效接地电网单相电弧接地故障的建模及仿真[J].电力系统自动化,2009,33(13):63-67.GU Rongbin,CAI Xu,CHEN Haikun,et al.Modeling and Simulating of single-phase arc grounding fault in noneffectiveearthed networks[J].Automation of Electric Power Systems,2009,33(13):63-67.
[22]薛永端,高旭,苏永智,等.小电流接地故障谐波分析及其对谐波选线的影响[J].电力系统自动化,2011,35(6):60-64.XUE Yongduan,GAO Xu,SU Yongzhi,et al.Analysis of harmonic in non-solidly earthed network and its influences on harmonic-based earth fault protection[J].Automation of Electric Power Systems,2011,35(6):60-64.