特高压试验线段电晕损失监测系统设计与实现.docxVIP

特高压试验线段电晕损失监测系统设计与实现刘云鹏1,22 13(1. 国网电力科学研究院，武汉 430074; 2. 华北电力大学电气与电子工程学院，保定 071003; 3. 国家电网公司特高压部，北京 100031)AC UHV Corona Loss Monitoring System’s Design and RealizationLIU Yun-peng1,2, YOU Shao-hua2, WAN Qi-fa1, CHEN Wei-jiang3(1. State Electric Power Research Institute, Wuhan 430074; 2. College of Electrical Electronic Engineering, North China ElectricPower University, Baoding 071003; 3. Department of UHV, State Grid Corporation of China, Beijing 100031)摘要：为了实现对我国特高压交流试验基地单回试验线段电晕损失长期准确测量，研究我国特高压交流输电线路电晕损失规律，设计研制了一套电晕损失监测系统。采用混合型光供电电子式电流互感器采集电晕电流信号，实现特高压试验线段电流的地面安全可靠测量；采用特高压试验基地电容式电压互感器（CVT）测量电压，并采用高精度小型电压互感器进行二次分压，实现线路电压的准确可靠测量；电流和电压信号均采用光纤传输；基于虚拟仪器技术，采用高精度多通道高速同步数据采集卡，同步采集特高压线段电晕电流、电压信号，采用正弦波参数法，计算得出电压和电流的功率因数角，进而算出电晕损失值。对光电模块 OPDL-16 (Optical Data Link-16)和 1000kV CVT的误差进行了测试。经过一段时间的实际运行，表明本系统满足测量精度要求，可在不同天气条件下对特高压试验线段的电晕损失进行长期实时准确监测，可以满足特高压电晕损失的研究需要，为我国的特高压输电线路电晕损失规律的深入研究奠定了基础。关键词：特高压；电晕损失；电子式电流互感器；1000kV CVT；误差；正弦波参数法；虚拟仪器Abstract: In order to measure corona loss of single circuit test line in our country’s UHV AC test base accurately in long period, andresearch the regularity of UHV AC transmission line corona loss in our country, a corona loss monitoring system is designed anddeveloped. Hybrid type optical electric supply electronic current transformer is adopted to acquire corona current signals. Thismethod makes the UHV test line current’s ground measurement on the safe side come true. The capacitance voltage transformer(CVT) in UHV Test Base is used to measure voltage. High precision voltage transformer is used to divide voltage signal at thesecond time. This method can measure the line voltage exactly and credibility. Current and voltage signals are both transmitted byoptical fiber. Based on virtual instrument technology, a high precision multi-channel high speed synchronous data acquirement cardis used to acquire the UHV lines corona current and voltage signals synchronously. The sine wave parameter algorithm is used tocalculate the power-factor