基于闭环负反馈高精度电流光学传感器技术的研究 - 电力系统保护与控制.PDFVIP

第 38 卷 第 19 期 电力系统保护与控制 Vol.38 No.19 2010 年 10 月 1 日 Power System Protection and Control Oct. 1, 2010 基于闭环负反馈高精度电流光学传感器技术的研究 季遥遥，李岩松，刘 君，孟 璐 （华北电力大学电气与电子工程学院，北京 102206） 摘要：光学电流互感器在实际运行中因易受温漂影响而不能长期稳定工作，导致这种传感器一直没有得到大范围实用化。为 了解决基于Faraday磁光效应的光学电流传感器温漂问题，在系统分析温度因素如何对其数学模型进行影响的基础上，首次 提出引入闭环量，实现闭环负反馈系统的思路，来进一步增强系统的测量精度。对其中关键技术高稳定度光源可控直流源控 制系统进行了硬件实现，结果达到了实验预期。验证了通过闭环负反馈来提高光学电流传感器精度方法的可行性。 关键词：光学电流互感器；数字化变电站；温漂；闭环负反馈；电力系统 Study on the high precision optical current transformer based on closed loop negative feedback JI Yao-yao ，LI Yan-song ，LIU Jun ，MENG Lu （School of Electrical and Electronic Engineering，North China Electric Power University ，Beijing 102206 ，China ） Abstract ： Susceptible to temperature drift in actual operation ，optical current transformer can not work in long-term stable situation, so it has not achieved practical results in a large range ．Aiming at the temperature drift problem of optical current transformer based on the Faraday magneto-optical effect ，the temperature factor of how it affects the mathematical model has been systematically analyzed and the idea of closed loop negative feedback has been introduced into the system to further enhance the measurement accuracy ．The key technology ，i.e. high stability DC source control system with controllable light source，has been implemented in hardware ．The experimental results have reached the expected target and also verify the feasibility of the method for improving the measurement accuracy of optical current transformer through the closed loop negative feedback ． Key words ：optical current transformer ；digital substion ；temperature drift ；closed loop negative feedback ；power system 中图分类号： TM452 文献标识码：A 文章编号： 1674-3415(2010)19-0165-05 扰、动态