灵州换流站交流滤波器跳闸导致直流功率回降原因分析
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摘要
交流滤波器、断路器及控制保护设备作为换流站的主要设备,其运行状态直接影响到直流系统的安全运行,为了提高交流滤波器、断路器的可靠性,文章对某换流站交流滤波器、断路器的故障原因进行了分析。通过对断路器气体成分分析、故障波形分析、常规试验数据分析和解体检查等方法,判断断路器内部绝缘筒、合闸电阻存在质量缺陷,伴随着系统运行中交流滤波器频繁投切使断路器主断口绝缘水平不断下降产生闪络放电故障,又由于BP11/13交流滤波器电容器塔支柱绝缘子存在设计缺陷,断路器故障同时产生过电压造成多组BP11/13交流滤波器跳闸,造成绝对最小滤波器不满足导致直流功率回降。最后,针对故障原因提出对应的处理措施,消除了直流系统运行中的隐患。
The operation status of AC filter,circuit breaker and control & protection device,as the main equipment of converter station,have direct effect on the safe operation of DC system. For improving reliability of AC filter and circuit breaker,in this paper,the cause of fault for the AC filter and circuit breaker at certain converter station is analyzed. The quality defects in the inner insulation tube and the closing resistor of the circuit breaker is judged by such methods as analysis of gas composition,fault waveform,conventional test data and disassembling inspection. The flashover discharge fault is generated due to continuous reduction of insulation level across open contacts with frequent switching of AC filter during the operation. Many groups of BP11/13 AC filter are tripped due to overvoltage of the fault of the circuit breaker because of the design in the support insulator of BP11/13 AC filter capacitor tower;causing the absolute minimum filter cannot meet requirement and leading to DC power reduction. Finally,the corresponding treatment measures for the cause of the fault so to eliminate the hidden danger of the DC system in theoperation.
The operation status of AC filter,circuit breaker and control & protection device,as the main equipment of converter station,have direct effect on the safe operation of DC system. For improving reliability of AC filter and circuit breaker,in this paper,the cause of fault for the AC filter and circuit breaker at certain converter station is analyzed. The quality defects in the inner insulation tube and the closing resistor of the circuit breaker is judged by such methods as analysis of gas composition,fault waveform,conventional test data and disassembling inspection. The flashover discharge fault is generated due to continuous reduction of insulation level across open contacts with frequent switching of AC filter during the operation. Many groups of BP11/13 AC filter are tripped due to overvoltage of the fault of the circuit breaker because of the design in the support insulator of BP11/13 AC filter capacitor tower;causing the absolute minimum filter cannot meet requirement and leading to DC power reduction. Finally,the corresponding treatment measures for the cause of the fault so to eliminate the hidden danger of the DC system in theoperation.
引文
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[6]甘鹏,王林,杨健,等.兴安直流兴仁换流站交流滤波器运行分析[J].电力电容器与无功补偿,2011,32(3):66-69.GAN Peng,WANG Lin,YANG Jian,et al.Operation analysis on AC filter in Xingan HVDC project Xingren converter station[J].Power Capacitor&Reactive Power Compensation,2011,32(3):66-69.
[7]郭树永,杨洁民,蒙健明.一起交流滤波器不平衡保护跳闸事故分析[J].电力电容器与无功补偿,2012,33(1):63-68.GUO Shuyong,YANG Jiemin,MENG Jianming.Analysis on an accident of the AC filter trip due to unbalance protection[J].Power Capacitor&Reactive Power Compensation,2012,33(1):63-68.
[8]王焕新.宜都换流站5631交流滤波器不平衡保护跳闸故障处理及分析总结[J].电力建设,2007,28(7):19-23.WANG Huanxin.Analysis and summary of Yidu converter station 5631 AC filter trip due to unbalance[J].Electric Power Construction,2007,28(7):19-23.
[9]郭锐.高压直流输电系统交流侧滤波器设计与保护[D].南京:南京理工大学,2010.
[10]灵州换流站7632断路器C相返厂解体分析报告[R].
[11]LW56800罐式断路器5000A,63kABC2试验报告[R].
[12]灵州-绍兴±800 k V直流输电工程成套设计书[Z].
[13]PCS976A交流滤波器成套保护装置说明书[Z].
[14]灵绍直流工程换流站滤波器投切表[Z].
[15]±800 kV灵绍直流送端电网安全稳定控制系统说明书[Z].
[2]贺智,蔡泽祥.高压直流输电系统继电保护原理与技术[M].北京:中国电力出版社,2013.
[3]刘传铨,张焰.电力系统无功补偿点及其补偿容量的确定[J].电网技术,2007,31(12):78-81.LIU Chuanquan,ZHANG Yan.Confirmation of reactive power compensation node and its optimal compensation capacity[J].Power System Technology,2007,31(12):78-81.
[4]谢佳君,谢龙,许斌.±800 kV特高压换流站交流滤波器配置方案研究[C]//2010输变电年会论文集,2010.
[5]周登洪.直流输电用并联及交流滤波电容器装置综述[J].电力电容器,2006,27(1):5-10.ZHOU Denghong.A summary of shunt and a.c.filtering capacitor installation used in HVDC transmission domestic[J].Power Capacitor,2006,27(1):5-10.
[6]甘鹏,王林,杨健,等.兴安直流兴仁换流站交流滤波器运行分析[J].电力电容器与无功补偿,2011,32(3):66-69.GAN Peng,WANG Lin,YANG Jian,et al.Operation analysis on AC filter in Xingan HVDC project Xingren converter station[J].Power Capacitor&Reactive Power Compensation,2011,32(3):66-69.
[7]郭树永,杨洁民,蒙健明.一起交流滤波器不平衡保护跳闸事故分析[J].电力电容器与无功补偿,2012,33(1):63-68.GUO Shuyong,YANG Jiemin,MENG Jianming.Analysis on an accident of the AC filter trip due to unbalance protection[J].Power Capacitor&Reactive Power Compensation,2012,33(1):63-68.
[8]王焕新.宜都换流站5631交流滤波器不平衡保护跳闸故障处理及分析总结[J].电力建设,2007,28(7):19-23.WANG Huanxin.Analysis and summary of Yidu converter station 5631 AC filter trip due to unbalance[J].Electric Power Construction,2007,28(7):19-23.
[9]郭锐.高压直流输电系统交流侧滤波器设计与保护[D].南京:南京理工大学,2010.
[10]灵州换流站7632断路器C相返厂解体分析报告[R].
[11]LW56800罐式断路器5000A,63kABC2试验报告[R].
[12]灵州-绍兴±800 k V直流输电工程成套设计书[Z].
[13]PCS976A交流滤波器成套保护装置说明书[Z].
[14]灵绍直流工程换流站滤波器投切表[Z].
[15]±800 kV灵绍直流送端电网安全稳定控制系统说明书[Z].