新疆凤乌线过电压及暂态电流的分析
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摘要
750kV凤乌线作为新疆第一条竣工的超高压线路,其试验调试对于最终新疆750kV系统的运行有重要的参考价值。
本文依据现有的凤乌线设备参数,构建了凤乌线的计算和仿真模型。对凤乌线在不同运行状态(单端电源空载、两端电源不同负载、不同故障类型)下的工频过电压进行了理论分析,并运用凤乌线的模型进行了计算。
针对凤乌线分布参数的特性,按照不同故障类型、跳闸、(重)合闸等操作分类,通过采用T或π型电路模型,对不同运行状态下的凤乌线模型进行了简化。根据简化后的集中参数线路模型,并考虑线路带并联电抗器及状态改变前初始储能的作用,通过拉普拉斯变换对简化电路进行分析,推导得到了其各种操作过电压的近似表达式。
本文通过理论分析与大量的EMTDC仿真,总结出凤乌线工频过电压与操作过电压现象的一般规律。对多种运行状态在考虑实际开关特性下的操作过电压倍数,进行了计算汇总。对凤乌线的实际运行有很强的参考意义。
最后,本文使用PSCAD/EMTDC软件对凤乌线模型分别进行了空载合闸、线路故障及合闸于永久性故障的仿真,并利用软件中的FFT分析仪对暂态电流的谐波分量进行了分析,并总结了其一般规律;针对上述仿真分析,对暂态电流可能对继电保护造成的影响进行了简要的分析。
本文的研究对凤乌线的调试和运行具有重要的参考意义,对其它750kV线路的调试和运行分析也有一定的参考价值。
As the first UHV transmission line which had been completed, the test and debugging of the 750kV transmission line—Feng-wu has important reference value to the operation of 750kV system in Xinjiang.
In this paper, based on the existing equipment parameters of Feng-wu line, calculation and simulation models have been built. Power frequency over-voltages on different operation state have been theoretically analyzed, which also been computed by using the calculation model.
For the characteristics of distributed parameter, according to different fault types, tripping, (re-) closing classifications, such as through the use of T orπ-type circuit model, the line’s models on different operating conditions have been simplified. Under the simplified lumped parameter line model, and to consider lines with shunt reactors and the initial effect of energy storage before the change of state, by the aid of the Laplace transform, the article takes up analysis on the simplified circuit and passes to deduce but got the approximate expression of switching Over-voltage. Through theoretical analysis and a large number of EMTDC simulations, this paper summarizes the general rules of the power frequency over-voltage and switching over-voltage. Furthermore, the multiples of switching over-voltage on various line running states with actual operation characteristics of switch taken into account have been summarized. These have a strong reference value on practical operation of Feng-wu line.
Finally, simulations that include line faults, the breaker closing to no-load line and permanent fault are done with PSCAD/EMTDC. The general rules have been found by analyzing the transient current using FFT analyzer. In response to the above simulation analysis, possible influences of Transient current on relay protection have been briefly analyzed.
This study is an important reference value to Feng-wu line debugging and running as Well as other 750kV transmission line in Xinjiang
本文依据现有的凤乌线设备参数,构建了凤乌线的计算和仿真模型。对凤乌线在不同运行状态(单端电源空载、两端电源不同负载、不同故障类型)下的工频过电压进行了理论分析,并运用凤乌线的模型进行了计算。
针对凤乌线分布参数的特性,按照不同故障类型、跳闸、(重)合闸等操作分类,通过采用T或π型电路模型,对不同运行状态下的凤乌线模型进行了简化。根据简化后的集中参数线路模型,并考虑线路带并联电抗器及状态改变前初始储能的作用,通过拉普拉斯变换对简化电路进行分析,推导得到了其各种操作过电压的近似表达式。
本文通过理论分析与大量的EMTDC仿真,总结出凤乌线工频过电压与操作过电压现象的一般规律。对多种运行状态在考虑实际开关特性下的操作过电压倍数,进行了计算汇总。对凤乌线的实际运行有很强的参考意义。
最后,本文使用PSCAD/EMTDC软件对凤乌线模型分别进行了空载合闸、线路故障及合闸于永久性故障的仿真,并利用软件中的FFT分析仪对暂态电流的谐波分量进行了分析,并总结了其一般规律;针对上述仿真分析,对暂态电流可能对继电保护造成的影响进行了简要的分析。
本文的研究对凤乌线的调试和运行具有重要的参考意义,对其它750kV线路的调试和运行分析也有一定的参考价值。
As the first UHV transmission line which had been completed, the test and debugging of the 750kV transmission line—Feng-wu has important reference value to the operation of 750kV system in Xinjiang.
In this paper, based on the existing equipment parameters of Feng-wu line, calculation and simulation models have been built. Power frequency over-voltages on different operation state have been theoretically analyzed, which also been computed by using the calculation model.
For the characteristics of distributed parameter, according to different fault types, tripping, (re-) closing classifications, such as through the use of T orπ-type circuit model, the line’s models on different operating conditions have been simplified. Under the simplified lumped parameter line model, and to consider lines with shunt reactors and the initial effect of energy storage before the change of state, by the aid of the Laplace transform, the article takes up analysis on the simplified circuit and passes to deduce but got the approximate expression of switching Over-voltage. Through theoretical analysis and a large number of EMTDC simulations, this paper summarizes the general rules of the power frequency over-voltage and switching over-voltage. Furthermore, the multiples of switching over-voltage on various line running states with actual operation characteristics of switch taken into account have been summarized. These have a strong reference value on practical operation of Feng-wu line.
Finally, simulations that include line faults, the breaker closing to no-load line and permanent fault are done with PSCAD/EMTDC. The general rules have been found by analyzing the transient current using FFT analyzer. In response to the above simulation analysis, possible influences of Transient current on relay protection have been briefly analyzed.
This study is an important reference value to Feng-wu line debugging and running as Well as other 750kV transmission line in Xinjiang
引文
[1]谷定燮.我国发展特高压输电的前景[J].高电压工程,2002,28(3):28-30.
[2]陈怡,蒋平,万秋兰,等.电力系统分析[M].北京:中国电力出版社,2005:32-33.
[3]喻新强,李卫东,李新建,等.国家电网公司750kV输变电示范工程建设总结(试验调试分册)[M].北京:中国电力出版社,2006:60-96.
[4]徐玉琴,刘丽花,张丽.超(特)高压输电线路差动保护电容电流补偿[J].电力科学与技术学报,2007,22(2):16-20.
[5]李斌,李永丽,贺家李. 750kV线路保护与并联电抗器动作的研究[J].电力系统自动化,2005,29(11):40-44.
[6]贺家李,李永丽,李斌,等.特高压输电线继电保护配置方案(一)特高压输电线的结构与运行特点[J].电力系统自动化,2002,26(23):1-6.
[7]贺家李,李永丽,郭征,等.特高压输电线继电保护配置方案(二)保护配置方案[J].电力系统自动化,2002,26(24):1-6.
[8]李斌,李永丽,贺家李,等. 750kV输电线路保护与三相合闸动作的研究[J].电力系统自动化,2004,28(12):60-64.
[9]李光琦.电力系统暂态分析(第二版)[M].北京:中国电力出版社,2004.
[10]邱关源.电路(第四版)[M].北京:高等教育出版社, 1995.
[11] Olimpo Anaya-Lara, E Acha. Modeling and Analysis of Custom Power Systems by PSCAD/EMTDC[J].IEEE Transactions on Power Deliver,17,(1),January 2002,266-272.
[12]李瑞生,索南加乐.750kV输电线路的特殊问题及其对线路保护的影响[J].继电器, 2006,34(3):1-4.
[13]沈晓凡,粟小华,周春霞.750kV输电线路对继电保护的影响[J].电力设备,2006,7(1):18-19.
[14]李怀强,粟小华,张健康.750kV示范工程官亭-兰州东线路保护整定探讨[J].继电器.2006,34(14): 1-3
[15]董新洲,苏斌,薄志谦,等.特高压输电线路继电保护特殊特殊问题的研究[J].电力系统自动化.2004,28(22):19-22.
[16]李杨,李永丽.750kV特高压输电线路的暂态电流研究[J].电力系统及其自动化学报,2006,18(3):18-23.
[17]孙宏伟,李梅,寇晓括,等.基于PSCAD/EMTDC的谐波仿真分析[J].电力电子技术,2004, 3(3):22-24.
[18]张健康,粟小华,李怀强,等.西北750kV示范工程继电保护应用[J].电力系统自动化,2006,30(18):83-88.
[19]盛琨,李永丽,李斌,等.特高压输电线路过电压的研究和仿真[J].电力系统及其自动化学报,2003,15(6):13-18.
[20] Dr G Gangadharan, P Anbalagan. Microprocessor based Three Step Quadrilateral Distance Relay for The Protection of EHV/UHV Transmission Lines[J]. Transactions on Power Delivery, 7 (1), 1992, 91-97.
[21] K W Leung. Computer-Aided Setting Calculation for Distance Zone 2 and Zone 3 Protection[J]. IEEE International Conference on Advances in Power System Control, Operation and Management, November 1991, Hong Kong,152-157.
[22] Z Y Xu,S F Huang,Li Ran,etc. A Distance Protection Relay for a 1000kV UHV Transmission Line[J]. IEEE Transactions on Power Deliver, 2008, 1-10.
[23] Z Y Xu, Z Q Du, Li Ran. A Current Differential Relay for a 1000kV UHV Transmission Line. IEEE Transactions on Power Deliver,22(3),July 2007.1392-1399
[24]徐松晓,贺家李,李永丽.特高压输电线分相电流相位差动保护的研究[J].继电器,2007,35(3):1-5.
[25]周金辉,贺家李,李永丽.用于特高压输电线保护的能量方向元件[J].中国电力,2007,40(1):15-18.
[26]苏斌,董新洲,孙元章等.特高压串补线路负序方向高频保护行为分析[J].电力系统自动化,2004,28(14): 9-13.
[27]薛士敏,贺家李,李永丽.特高压输电线路负序方向纵联保护[J].电力系统自动化,2007,31(18):50-53.
[28]樊占峰,李瑞生,张红霞,等.特高压输电线路保护的方案研究——纵联差动保护[J].继电器,2005,33(19):5-9.
[29]苏斌,董新洲,孙元章.适用于特高压线路的差动保护分布电容电流补偿算法[J].电力系统自动化,2005,29(8):36-40.
[30]李斌,贺家李,杨洪平,等.特高压长线路距离保护算法改进[J].电力系统自动化,2007,31(1):43-46.
[31] Guihong Feng, Jiayun Shao, Bingyi Zhang, etc. Study on A Novel Controllable Reactor Using in Ultra-high Voltage System[J]. 12-15 Oct. 2008 Page(s):1–4
[32]李九虎,郑玉平,陈松林,等. 750kV系统继电保护研究[J].中国电力,2006,39(1):7-10.
[33]李斌,李永丽,贺家李.特高压长线路电容电流对距离的影响[J].天津大学学报,2006,39(增刊):83-87.
[34]梁思聪,王维庆,张新燕,等.基于PSCAD/EMTDC软件的空载线路工频过电压分析,华东电力,2009,2.
[35]李福寿.电力系统过电压计算[M].北京:水利电力出版社, 1988.
[36]解广润.电力系统过电压[M].北京:水利电力出版社,1985.
[37]黄佳,王钢,李海锋,等.1000kV长距离交流输电线路工频过电压仿真研究[J].继电器,2007,35(4):32-35.
[38]陈水明,许伟,何金良.1000kV交流输电线路的工频暂态过电压研究[J].电网技术, 2005,29(19):1-5.
[39]斯拉麦卡E,瓦特西W.高低压电网中的暂态过程计算原理[M].程积高,译.北京:机械工业出版社,1983.
[40]李福寿.电力系统过电压计算[M].北京:水利电力出版社,1986.
[41]周泽存.高电压技术(第三版)[M].北京:中国电力出版社,2007.
[2]陈怡,蒋平,万秋兰,等.电力系统分析[M].北京:中国电力出版社,2005:32-33.
[3]喻新强,李卫东,李新建,等.国家电网公司750kV输变电示范工程建设总结(试验调试分册)[M].北京:中国电力出版社,2006:60-96.
[4]徐玉琴,刘丽花,张丽.超(特)高压输电线路差动保护电容电流补偿[J].电力科学与技术学报,2007,22(2):16-20.
[5]李斌,李永丽,贺家李. 750kV线路保护与并联电抗器动作的研究[J].电力系统自动化,2005,29(11):40-44.
[6]贺家李,李永丽,李斌,等.特高压输电线继电保护配置方案(一)特高压输电线的结构与运行特点[J].电力系统自动化,2002,26(23):1-6.
[7]贺家李,李永丽,郭征,等.特高压输电线继电保护配置方案(二)保护配置方案[J].电力系统自动化,2002,26(24):1-6.
[8]李斌,李永丽,贺家李,等. 750kV输电线路保护与三相合闸动作的研究[J].电力系统自动化,2004,28(12):60-64.
[9]李光琦.电力系统暂态分析(第二版)[M].北京:中国电力出版社,2004.
[10]邱关源.电路(第四版)[M].北京:高等教育出版社, 1995.
[11] Olimpo Anaya-Lara, E Acha. Modeling and Analysis of Custom Power Systems by PSCAD/EMTDC[J].IEEE Transactions on Power Deliver,17,(1),January 2002,266-272.
[12]李瑞生,索南加乐.750kV输电线路的特殊问题及其对线路保护的影响[J].继电器, 2006,34(3):1-4.
[13]沈晓凡,粟小华,周春霞.750kV输电线路对继电保护的影响[J].电力设备,2006,7(1):18-19.
[14]李怀强,粟小华,张健康.750kV示范工程官亭-兰州东线路保护整定探讨[J].继电器.2006,34(14): 1-3
[15]董新洲,苏斌,薄志谦,等.特高压输电线路继电保护特殊特殊问题的研究[J].电力系统自动化.2004,28(22):19-22.
[16]李杨,李永丽.750kV特高压输电线路的暂态电流研究[J].电力系统及其自动化学报,2006,18(3):18-23.
[17]孙宏伟,李梅,寇晓括,等.基于PSCAD/EMTDC的谐波仿真分析[J].电力电子技术,2004, 3(3):22-24.
[18]张健康,粟小华,李怀强,等.西北750kV示范工程继电保护应用[J].电力系统自动化,2006,30(18):83-88.
[19]盛琨,李永丽,李斌,等.特高压输电线路过电压的研究和仿真[J].电力系统及其自动化学报,2003,15(6):13-18.
[20] Dr G Gangadharan, P Anbalagan. Microprocessor based Three Step Quadrilateral Distance Relay for The Protection of EHV/UHV Transmission Lines[J]. Transactions on Power Delivery, 7 (1), 1992, 91-97.
[21] K W Leung. Computer-Aided Setting Calculation for Distance Zone 2 and Zone 3 Protection[J]. IEEE International Conference on Advances in Power System Control, Operation and Management, November 1991, Hong Kong,152-157.
[22] Z Y Xu,S F Huang,Li Ran,etc. A Distance Protection Relay for a 1000kV UHV Transmission Line[J]. IEEE Transactions on Power Deliver, 2008, 1-10.
[23] Z Y Xu, Z Q Du, Li Ran. A Current Differential Relay for a 1000kV UHV Transmission Line. IEEE Transactions on Power Deliver,22(3),July 2007.1392-1399
[24]徐松晓,贺家李,李永丽.特高压输电线分相电流相位差动保护的研究[J].继电器,2007,35(3):1-5.
[25]周金辉,贺家李,李永丽.用于特高压输电线保护的能量方向元件[J].中国电力,2007,40(1):15-18.
[26]苏斌,董新洲,孙元章等.特高压串补线路负序方向高频保护行为分析[J].电力系统自动化,2004,28(14): 9-13.
[27]薛士敏,贺家李,李永丽.特高压输电线路负序方向纵联保护[J].电力系统自动化,2007,31(18):50-53.
[28]樊占峰,李瑞生,张红霞,等.特高压输电线路保护的方案研究——纵联差动保护[J].继电器,2005,33(19):5-9.
[29]苏斌,董新洲,孙元章.适用于特高压线路的差动保护分布电容电流补偿算法[J].电力系统自动化,2005,29(8):36-40.
[30]李斌,贺家李,杨洪平,等.特高压长线路距离保护算法改进[J].电力系统自动化,2007,31(1):43-46.
[31] Guihong Feng, Jiayun Shao, Bingyi Zhang, etc. Study on A Novel Controllable Reactor Using in Ultra-high Voltage System[J]. 12-15 Oct. 2008 Page(s):1–4
[32]李九虎,郑玉平,陈松林,等. 750kV系统继电保护研究[J].中国电力,2006,39(1):7-10.
[33]李斌,李永丽,贺家李.特高压长线路电容电流对距离的影响[J].天津大学学报,2006,39(增刊):83-87.
[34]梁思聪,王维庆,张新燕,等.基于PSCAD/EMTDC软件的空载线路工频过电压分析,华东电力,2009,2.
[35]李福寿.电力系统过电压计算[M].北京:水利电力出版社, 1988.
[36]解广润.电力系统过电压[M].北京:水利电力出版社,1985.
[37]黄佳,王钢,李海锋,等.1000kV长距离交流输电线路工频过电压仿真研究[J].继电器,2007,35(4):32-35.
[38]陈水明,许伟,何金良.1000kV交流输电线路的工频暂态过电压研究[J].电网技术, 2005,29(19):1-5.
[39]斯拉麦卡E,瓦特西W.高低压电网中的暂态过程计算原理[M].程积高,译.北京:机械工业出版社,1983.
[40]李福寿.电力系统过电压计算[M].北京:水利电力出版社,1986.
[41]周泽存.高电压技术(第三版)[M].北京:中国电力出版社,2007.
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