二次设备直流电源模块低压侧绝缘检测方式研究

Low-Voltage Side Insulation Detection Method for Secondary Equipment DC Power Module

直流电源模块的低压侧如果因外部回路或内部绝缘异常等原因,造成该接地的不接地,不该接地的对地绝缘降低,很可能会导致异常干扰,甚至外部高压反击损坏设备的严重问题。针对电力二次设备直流电源模块低压侧的对地绝缘缺乏检测的问题,提出了实用可靠的检测技术,并设计了样机,现场试验证明了该方案的有效性,可有效提高电站二次电源设备的运行可靠性。

In case of abnormal external circuit or internal insulation, the low-voltage side of the DC power module may be subjected to abnormal grounding, and consequent problems of abnormal interference, or more serious damage to the equipment by the external high voltage counterattack. Aiming at the problem of lack of ground insulation detection on the low-voltage side of the DC power module of the secondary power equipment, a practical and reliable detection technology is proposed, and a prototype is designed. The field test proves the effectiveness of the scheme, which can effectively improve the operation reliability of the secondary power supply and reduce the potential accidents.