【作者】 赵伟；

【导师】 李宝树；

【作者基本信息】 华北电力大学（河北） ， 电工理论与新技术， 2004， 硕士

【摘要】 本文介绍了一套新型的过电压在线监测分析系统。整个系统由光纤电压传感器、数据采集卡及一台微机组成。该系统利用Labview虚拟仪器软件开发了所有的软件部分,以实现对过电压的数据的处理及分析,包括单次过电压参数计算,多次记录的统计分析、过电压概率分布规律以及简单过电压类型的判断等。系统的传感器采用光纤电压传感器,该传感器是利用具有Pockels效应的BGO晶体(Bi4Ge3O12)作为传感头来感受电压变化,光纤作为光信号的传输介质的一种新型电压测量装置。系统的数据采集部分由高速数据采集卡PCI-9812完成,该卡配有4个20MHz同步采样频率的A/D转换器和32K的FIFO缓存,可同步完成4通道的高速采集。试验证明,该装置能满足对过电压的监测,即将投入现场试运行。该系统在电力系统故障分析及绝缘设计放面有很高的实用价值。更多还原

【Abstract】 In this paper we bring forward a new method of transient over-voltage monitoring for substation. The system is made up of an optical voltage sensor, a high-speed data acquire board and a computer. We devised a system for analyzing over-voltage data by LabVIEW. The analyses include calculating all parameters of once over-voltage, statistics of over-voltages and distinguishing the type of once over-voltage. In this system, we monitor over-voltage by optical voltage sensor. Optical voltage sensor is a new kind of voltage measuring appliance, which measure voltage by crystal electro optic effect (Pockels effect) and transmit data through optical fiber. And we get the data by a high speed data acquire board PCI-9812. The board has 4 20MHz A/D converters, one converter for each analog channel and 32K FIFO memory, so it can transfer data with four channels synchronously. There are many facts proof that this system can satisfy the requirement of over-voltage monitoring. And it will be applied in practical operation.更多还原