- 型号:SWITCH LSA3K-1B
- 数量:1
- 制造商: 厦门兴锐达自动化设备有限公司
- 有效期:2019/2/1 0:00:00
2.2测量装置的软件设计
整个测量系统软件包括B波控制模块和传递过电压测量模块,其中B波控制系统核心部件为数字I/O NI USB-6501,它具有电压调节、电压指示、试验次数和触发等功能。其发生器的控制界面见图7。测量装置的测量系统的硬件为高速数字化板卡NI PCI-5152,它具有采集、平滑、拟合(标准B类冲击波仿真)、计算和报告自动生成功能。
sj7.JPG图7 发生器控制面板
Fig.7 Generator control panel
互感器传递过电压测量波形拟合程序如图8,图中红线为实侧波形而蓝线为标准定义波形,波形畸变率小于3%。此外还可以多次测量传递过电压,求不确定度,传递过电压测量不确定度如图9。
sj8.JPG图8 传递过电压测量界面
Fig.8 Transient over voltagemeasurements interface
sj9.JPG图9 传递过电压测量不确定度界面
Fig.9 Uncertainty of transientover voltage measurements interface
3 现场试验分析
整个测控装置构成如图10所示,装置轻便灵活,使用方便。为了减少干扰,增加了隔离滤波和屏蔽室,提高系统的稳定可靠性。
sj10.JPG图10 便携式传递过电压测量装置
Fig 10 Portable class B impulse wave measurement equipment
利用便携式传递过电压测量装置对110kV GIS电压互感器进行传递过电压测量,分别进行了单次测量和十次测量,波形如图10和图11。从图10中可以看出单次测量的B冲击波,无论波形特征,波前时间,波尾时间均符合GB 20840.1-2010要求,测得二次传递过电压小于标准要求的限值1600V,因此可判断符合要求;而图11中是相同条件下十次测量得到的二次传递过电压值,可以看出十次产生的B类冲击波幅值在100-300V之间,波前时间在8到10ns(T1)之间,波尾时间大于100 ns(T2)。十次重复测量的标准不确定度小于2%。
sj11.JPG图11 GIS电压互感器传递过电压单次测量
Fig.11 one time transient over voltage measuring of voltage transformer in GIS
sj12.JPG图12 GIS电压互感器传递过电压十次测量
Fig.12 ten times transient over voltage measuring of voltage transformer in GIS
4 结论
1.利用实验室虚拟仪器工作平台 Lab VIEW 8.6能方便快捷的设计互感器传递过电圧试验的测量控制系统;
2.本文设计的B类冲击波发生器满足GB 20840.1-2010的要求,系统重复测量不确定度小于2%,可为GIS互感器型式试验提供依据;
3.便携式传递过电压测量装置具有初步的智能功能,现场使用方便, 同時可作为互感器传递过电压远程试验终端。
参考文献
[1] GB/T18134-2000 极快速冲击高电压试验技术第一部分: 气体绝缘变电站中陡波前过电压测量系统.
GB/T18134-2000 High-voltage testing techniques with very fast impulses. Part 1:Measuring systems for very fast front over voltages generated in gas-insulatedsubstations.
[2] 岳功昌,刘卫东,等.特高压气体绝缘组合开关设备中特快速瞬态过电压测量系统的标定[J].高电压技术 第2012,38(2):342-343.
YUEGongchang, LIU Weeding, et al.Calibration of Very Fast Transient Over voltageMeasurement System for Ultra High Voltage Gas Insulated Switchgear [J]. HighVoltage Engineering, 2012, 38(2):342-343.
[3] 周瑜,李军,徐世山,等.GIS中快速瞬态过电压的测试技术[J].绝缘材料,2009,42(2):68-71.
ZHOUYu, LI Jun, XU Sheehan, et latest Technology of VFTO in GIS [J].Insulating Materials,2009, 42(2):68-71(in Chinese).
[4] 陈维江,李志兵,孙岗,等.特高压气体绝缘开关设备中特快速瞬态过电压特性的试验研究[J].中国电机工程学报,2011,31(31):38-47.
ChenBeijing, Li Shining, Sun Gang, et al.Experimen-tal resesrch on the Characteristics of very fast transient over voltagein ultra high voltage gas insulated switchgear[J].Proceedings of theCSEE,2011,31(31):38-47.
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