高压电压互感器的设计毕设论文.doc

摘 要 随着中国社会主义经济的飞速发展，电力技术也必须不断发展，使得它能适应中国农工商业的用电需求。电力系统输电容量的不断扩大，远距离输电迅速增加，电网等级的不断提高。为了使变电站自动化的技术进一步改善，互感器不断的改良更新，使二次系统起到更精确的测量和监控作用。 本文通过对几种电压互感器的结构分析，比较其各自的优缺点，最终选择了阻容式电压互感器作为本文的研究对象。通过初步电路设计，原理分析，参数计算，确定阻容式分压式传感器的结构组成，通过仿真和实验，证明出其测量准确度高，暂态相应特性好，线性无饱和等一系列优点。然后通过有源光学电压传感器设计，使其满足电力系统测控和继电保护对电压信号的取样要求。最后通过对传感头和信号处理器的屏蔽，系统悬浮接地，在电路板上的电源与地线间加去耦电容等方法，使其电磁兼容措施得到完善，让系统的可靠性得到进一步的保证和提高。 ：电压互感器；MATLAB仿真 Abstract With socialism in Chinas rapid economic development, power technology must continue to develop, make it to the Chinese agricultural trade demand. Power transmission system capacity continues to expand, a rapid increase in long-distance power transmission, power grids levels rising. For substation automation technology to further improve the transformer constantly improved update so that the second system has played a more precise measurement and monitoring role. Based on several voltage transformer structure analysis and comparison of their respective merits, finally chose the RCVT transformer, as this study. The initial circuit design, principle analysis, parameter calculation, to determine R-pressure sensor structure and Through simulation and experiment, has demonstrated this kind of AOVT has advantages of high accuracy, better transient response characteristics, well linearity and no saturation etc. Then through an ideal project in the design of AOVT, make it responsive to the power system protection and control of the voltage signal sampling requirements. Finally, the sensor and signal processor shielding, grounding suspension system, circuit filter into the methods, EMC measures to enable it to be perfect, so that the reliability of the system is further assured and improved. Keywords: tension transformer; count; MATLABsimilation 目 录 摘 要 I Abstract II 1绪论 1 1.1 题目背景及目的 1 1.2 国内外研究状况 2 电压互感器原理 4 2.1 电压互感器工作原理 4 2.2 电容式电压互感器工作原理 5 2.3 电阻式电压互感器工作原理 6 2.4 阻容分压型互感器工作原理及参数计算 7 2.5 电压互感器的分类 9 3 电压互感器设计计算 11 3.1 计算依据 11 3.2