等电位屏蔽电容器分压器测量特性的仿真研究

IF 2.9 3区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Fanghui Yin;Shilin Shi;Jianchao Li;Bo Li;Liming Wang;Jianchao Zheng;Masoud Farzaneh
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引用次数: 0

摘要

暂态电压的在线测量对于维护交流电力系统的可靠性和安全性至关重要。随着特高压/超高压交流电力系统的建设,交流设备的电压等级不断提高,传统的电容分压器因其接地电容不稳定而变得不可靠。本文提出了一种等电位屏蔽CVD (ES-CVD),并对其测量特性进行了仿真研究。结果表明,当距离地面的距离大于测量球面导体直径的十倍时,可以保证稳定的测量。ES-CVD能有效防止被测球形导体表面电场强度超过临界放电场强。被测高压导线和相邻高压导线对测量球面导体的接地电容有重大影响。然而,屏蔽电极可以显著降低它们的影响。与不带屏蔽电极的CVD相比,带屏蔽电极的分压器可将测量误差降低一个数量级,满足瞬态电压的测量要求。本文的研究成果可为高压交流暂态电压的测量提供参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Simulation Study of the Measurement Characteristics of Equipotential Shielding Capacitor Voltage Divider
The online measurement of transient voltages is crucial for maintaining the reliability and safety of ac power systems. With the construction of UHV/EHV ac power systems, the voltage levels of ac equipment continue to increase, and traditional capacitor voltage dividers (CVDs) become unreliable due to the instability of their ground capacitance. This article proposes an equipotential shielding CVD (ES-CVD) and conducts simulation research on its measurement characteristics. The results show that a stable measurement can be guaranteed when the distance to the ground is greater than ten times the diameter of the measuring spherical conductor. The ES-CVD can effectively prevent the electric field strength on the surface of the measuring spherical conductor from exceeding the critical discharge field strength. The high-voltage wire to be measured and adjacent high-voltage wires have a significant impact on the ground capacitance of the measuring spherical conductor. However, the shielding electrode can significantly reduce their impact. Compared to a CVD without a shielding electrode, a divider with a shielding electrode can reduce the measurement error by one order of magnitude, which meets the measurement requirements of transient voltage. The research results in this article can provide a reference for measuring high-voltage ac transient voltage.
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来源期刊
IEEE Transactions on Dielectrics and Electrical Insulation
IEEE Transactions on Dielectrics and Electrical Insulation 工程技术-工程:电子与电气
CiteScore
6.00
自引率
22.60%
发文量
309
审稿时长
5.2 months
期刊介绍: Topics that are concerned with dielectric phenomena and measurements, with development and characterization of gaseous, vacuum, liquid and solid electrical insulating materials and systems; and with utilization of these materials in circuits and systems under condition of use.
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