引用本文: | 庞福滨,刘玙,嵇建飞,等.直流输电工程直流电流互感器现场暂态校验技术[J].电力系统保护与控制,2019,47(14):179-187.[点击复制] |
PANG Fubin,LIU Yu,JI Jianfei,et al.On-site transient performance calibration of DC current transformer for HVDC transmission project[J].Power System Protection and Control,2019,47(14):179-187[点击复制] |
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摘要: |
随着直流输电工程建设的不断推进,直流电流互感器的现场校验技术逐渐成为直流输电领域的一大研究热点。针对目前直流电流互感器现场暂态性能校验技术的研究空白,分析了现有直流电流互感器的工作原理及其现场校验方法,研制了一套基于信号回采和预畸调节的便携式直流电流互感器现场暂态校验系统。该系统通过修正产生接近于仿真信号的阶跃大电流,其500 kHz的高速发送和采集模块保障了暂态过程采样与波形还原的准确性。利用该测试系统,在苏南UPFC工程实现了国内首次直流电流互感器的现场暂态性能试验。对极线和阀出口侧互感器的上升时间、最大过冲和暂态延时进行了测试,试验结果为直流电流互感器的暂态性能评估提供了依据。该技术在直流电流互感器现场校验中具有重要的推广意义。 |
关键词: 直流电流互感器 现场校验 暂态性能 信号回采 预畸调节 |
DOI:10.7667/PSPC20191423 |
投稿时间:2018-07-26修订日期:2018-08-25 |
基金项目:国家自然科学基金项目资助(51707090);国家电网有限公司科技项目资助“特高压直流控制保护系统现场测试及运维优化关键技术研究与应用” |
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On-site transient performance calibration of DC current transformer for HVDC transmission project |
PANG Fubin,LIU Yu,JI Jianfei,BU Qiangsheng,ZHANG Chi |
(State Grid Jiangsu Electric Power Co., Ltd. Research Institute, Nanjing 211103, China) |
Abstract: |
With the constantly development of High-Voltage Direct Current (HVDC) transmission system construction, the on-site calibration of DC current transformer has become the major research interest in HVDC transmission field. According to the research gap of the on-site transient performance calibration technology, the working principle of the existing DC current transformer and the on-site calibration method are analyzed. A set of portable transient performance calibration system for DC current transformer is devised based on signal resampling and pre-distorting adjustment. By revision, the system produces the large step current close to the simulation signal, and its 500 kHz high speed sending and collecting modules ensure the accuracy of the sampling and waveform restoring during the transient process. Furthermore, the first on-site transient performance test of the pole and converter valve DC current transformers has been carried out with the system in Sunan UPFC Project. The rising time, maximum overshoot and the transient delay of the pole and converter valve transformers are tested, and the results provide the basis for the evaluation of the DC current transformers. The technology has a good application prospect for the on-site DC current transformer calibration. This work is supported by National Natural Science Foundation of China (No. 51707090) and Science and Technology Project of State Grid Corporation of China “Key Technical Research and Application of On-site Test and Operation Maintenance for UHVDC Control and Protection System”. |
Key words: DC current transformer on-site calibration transient performance signal resampling pre-distorting adjustment |