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| 110kV变电站过电压在线监测系统及其波形分析 | |
| 引用本文： | 杜林,李欣,司马文霞,席世友,杨庆,袁涛.110kV变电站过电压在线监测系统及其波形分析[J].高电压技术,2012,38(3):535-543. |
| 作者姓名： | 杜林 李欣 司马文霞 席世友 杨庆 袁涛 |
| 作者单位： | 1. 重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆,400030 2. 重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030／湖南省电力公司科学研究院,长沙410007 3. 重庆市电力公司,重庆,401420 |
| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划) |
| 摘 要： | 过电压是造成电网绝缘损害的主要原因之一,也是选择电气设备绝缘强度的决定性因素,电力系统过电压在线监测对分析过电压事故原因和改善系统绝缘配合具有重要的现实意义。在研制成功110kV过电压传感器以及高速变频采集系统的基础上,重庆110kV先锋过电压在线监测系统可自动捕获10、35、110kV电网中出现的外部和内部过电压。另外还介绍了该系统的结构、用于过电压信号采集的低阻尼阻容分压器和套管式分压器、变频采集系统及系统软件等关键模块。根据现场采集到的典型过电压波形样本,结合值班室记录,分析了雷电、操作及暂时等过电压的波形特点和产生原因,监测结果可为输电线路防雷、变电站过电压防护、电力系统规划和设计提供科学依据。 |
| 关 键 词： | 在线监测 过电压传感器 波形分析 雷电过电压 操作过电压 暂时过电压 |
Overvoltage On-line Monitoring System for 110 kV Substation and Its Waveforms Analysis |
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| DU Lin,LI Xin,SIMA Wenxia,XI Shiyou,YANG Qing,YUAN Tao.Overvoltage On-line Monitoring System for 110 kV Substation and Its Waveforms Analysis[J].High Voltage Engineering,2012,38(3):535-543. | |
| Authors: | DU Lin LI Xin SIMA Wenxia XI Shiyou YANG Qing YUAN Tao |
| Affiliation: | 1(1.State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University,Chongqing 400030,China; 2.Hunan Electric Power Corporation Research Institute,Changsha 410007,China; 3.Chongqing Electric Power Corporation,Chongqing 401420,China) |
| Abstract: | Overvoltage is one of the main reasons to cause insulation damage and is also the decisive factor to choose insulation coordination for electrical accessory in power system,and overvoltage on-line monitoring system is of great importance for the analysis of origins of overvoltage failures and improvement of the electrical apparatus insulation coordination in the power system.We introduced an overvoltage on-line system monitoring system for 110 kV Xianfeng substation in Chongqing,which was developed successfully based on the divider and high,variable sampling speed data acquisition card.Moreover,we presented key modules of this system,including two low damping capacitance-resistance dividers,a transformer bushing divider,a variable sampling speed system,and a software system,and so on,and then analyzed overvoltage type and its forming causes by running records.The monitoring results can be utilized for transmission lines lightning protection,substation voltage protection,electrical grid layout,and design. |
| Keywords: | on-line monitoring overvoltage sensor waveform analysis lightning overvoltage switching overvoltage temporary overvoltage |
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