新型配电网电压互感器的研究

为消除配电网中常见的铁磁谐振现象，防止其对配电网电压互感器造成的严重危害，国内外一些研究工作主要从电压互感器外部着手来解决谐振问题，起到了一定效果，但仍存在不同程度的问题。通过借鉴这些研究工作的经验和不足，提出在互感器内部进行改进：在电压互感器开口三角内部短接形成稳定绕组、高压绕组中性点对地串接零序绕组和铁心采用平面形六柱四绕组及对称式四柱四绕组结构等新措施，探讨设计新型原理的电压互感器。从消谐原理、等值电路等方面进行理论分析，表明以上改进措施能够有效防止和消除铁磁谐振，且制样机挂网运行效果良好，证明了新型原理电压互感器研究的成功。

Research on new voltage transformer for electric power distribution network

For eliminating the ferro-resonance in the electric power distribution networks and avoiding the gravely endangerment on voltage transformer, the research both in China and abroad mostly took measures from the outside of voltage transformer. It took effect in a degree, but exists problems. Using for its experiences and shortages, the improvements inside voltage transformer were presented, such as the stability coil formed by connecting the open-delta, the zero sequence coil from the neutral point of high voltage coil to ground and new structures of iron core, and a new type of voltage transformer was devised. The theory of ferro-resonance elimination and equivalent circuit of transformer was analyzed, which shows the above measures are efficiency. The sample equipment runs well, and the research on new type of voltage transformer is successful.