特高压电容式电压互感器阻抗测量及参数灵敏度分析

发布时间：2018-06-07 13:41

本文选题：特高压 + 电容式电压互感器　；参考：《高电压技术》2014年06期

【摘要】：为改善特高压电容式电压互感器(CVT)的工艺结构,提高其瞬态性能和可靠性,研究了其宽频阻抗特性的测量和建模方法。首先,通过不同的测量方法获得了压接型和焊接型工艺结构的1 000 kV特高压CVT电容分压器的宽频阻抗特性,并相互验证了测量方法的有效性;其次,基于特高压CVT电容分压器的宽频阻抗测量数据,建立了具有物理意义的宽频等效电路模型,通过宽频阻抗仿真结果与测量结果的比较验证了模型的正确性和有效性;最后,定义了评价CVT性能的网络函数,并对特高压CVT电容分压器的蓄积电阻与蓄积电感、电容器电容与电导、均压环对地电容等电路参数进行了灵敏度分析,为特高压CVT的优化设计、瞬态分析和工艺改进等提供了依据。
[Abstract]:In order to improve the process structure of UHV capacitive voltage transformer (CVT) and improve its transient performance and reliability, the measurement and modeling method of its wide band impedance characteristics was studied. Firstly, the wide band impedance characteristics of the 1 000 kV UHV CVT capacitor divider with the welding and pressure type process structures are obtained through different measurement methods, and the validity of the measurement method is verified. Based on the measurement data of broadband impedance of UHV CVT capacitor divider, a physical broadband equivalent circuit model is established. The validity and validity of the model are verified by comparing the simulation results of broadband impedance with those of measurement results. The network function for evaluating the performance of CVT is defined. The circuit parameters such as accumulative resistance and accumulative inductance, capacitor capacitance and conductance, voltage-to-earth capacitance of UHV CVT capacitor divider are analyzed, which is used to optimize the design of UHV CVT. The transient analysis and process improvement are provided.
【作者单位】：中国电力科学研究院;华北电力大学新能源电力系统国家重点实验室;西安西电电力电容器有限责任公司;桂林电力电容器有限责任公司;
【基金】：国家“十二五”科技支撑计划(2011BAA01B01) 国家电网公司科技项目(SGTGYJSFW[2012]304)~~
【分类号】：TM451

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