Scholarlink

The proliferation of distributed renewable energy sources integrated with power electronic converters introduces high-frequency oscillations (near-integer multiples of switching frequencies) into power grids, rendering traditional voltage sensors inadequate for accurate wide-dynamic-range (both time and frequency domain) voltage measurement. This inaccuracy impacts power metering and protection systems, threatening grid stability. Capacitive voltage dividers (CVDs), particularly those employing high-voltage gas standard capacitors as the high-voltage arm, are increasingly favored for harmonic measurement due to their potential for wider bandwidth. This paper focuses on the wideband measurement characteristics of a developed 110 kV SF6 gas-insulated standard capacitor-based CVD system. The system’s structural design, including the high-voltage arm (SF6 capacitor with optimized shielding and electrode structure) and low-voltage arm (cage structure using NPO ceramic capacitors), is detailed. A wide-frequency equivalent circuit model is established, incorporating key distributed parameters (stray capacitances and inductances), to analyze its voltage transformation characteristics. Comprehensive experimental tests are conducted to evaluate the system’s performance under varying conditions.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Research on Measurement Characteristics of 110 kV Standard Capacitor Voltage Division System

  • 会议论文

  • 发表日期：

    2026年

查看全文
  • Mingzhu Yao,
  • Fuchang Lin,
  • Ruiqi Liu,
  • Zhaozhi Long,
  • Li Ding

摘要

The proliferation of distributed renewable energy sources integrated with power electronic converters introduces high-frequency oscillations (near-integer multiples of switching frequencies) into power grids, rendering traditional voltage sensors inadequate for accurate wide-dynamic-range (both time and frequency domain) voltage measurement. This inaccuracy impacts power metering and protection systems, threatening grid stability. Capacitive voltage dividers (CVDs), particularly those employing high-voltage gas standard capacitors as the high-voltage arm, are increasingly favored for harmonic measurement due to their potential for wider bandwidth. This paper focuses on the wideband measurement characteristics of a developed 110 kV SF6 gas-insulated standard capacitor-based CVD system. The system’s structural design, including the high-voltage arm (SF6 capacitor with optimized shielding and electrode structure) and low-voltage arm (cage structure using NPO ceramic capacitors), is detailed. A wide-frequency equivalent circuit model is established, incorporating key distributed parameters (stray capacitances and inductances), to analyze its voltage transformation characteristics. Comprehensive experimental tests are conducted to evaluate the system’s performance under varying conditions.