摘要
对220kV有效接地系统部分中性点不接地的变压器,采用经小电抗器接地的方式,既限制了单相接地短路电流,又大大降低了过电压水平,提高了运行的安全可靠性。结合河南濮阳220kV岳村变试点工程,介绍了小电抗器的结构、参数及主要技术要求。可以在220kV系统推广此项实用的新技术。
For 220 kV transformers with isolated neutral within the active grounding system, the low reactance grounding may limit single-phase grounding current and greatly reduce over-voltage level, thus promote transformer's reliable operation. The paper introduces the structure, parameters and technical requirements of the small reactor used in 220 kV Yucun Substation demonstrative project in Putang, Henan Province. It is suggested to popularize the application of this technology.
出处
《电力设备》
2000年第1期13-16,共4页
Electrical Equipment
