基于电力电子开关的快速调匝式消弧线圈研究

Research of fast adjustable arc suppression coil based on power electronic switch

伊拉克某油田配电系统采用电阻接地形式,由于支线电网所处环境恶劣以及部分设施老化,接地故障频繁,使得油田设备供电可靠性急剧下降。针对这一问题提出了一种消弧线圈接地改造技术方案,该方案基于传统调匝式消弧线圈技术,用电力电子开关替代了机械负载开关,以克服原始有载机械开关动态响应差、补偿不及时的问题,同时保留了传统调匝式消弧线圈的经济性、可靠性的特点。多工况MATLAB仿真验证和物理实验证明,本技术方案经济可行、有效,可以实施配电系统的技术改造。

The power distribution system of an oil field in Iraq adopts resistance grounding.Due to the harsh environment of the branch power grid,the aging of some facilities,and frequent grounding faults,the reliability of the oil field equipment power supply has dropped sharply.To solve this problem,this paper proposes a technical solution for the grounding of the arc suppression coil.The solution is based on the traditional turn-adjustable arc suppression coil technology.The mechanical load switch is replaced by a power electronic switch to overcome the problems of poor dynamic response and delayed compensation of original on-load mechanical switches while retaining the economical and reliable characteristics of traditional turn-adjusting arc suppression coils.Multi-condition MATLAB simulation verification and physical experiments prove that this technical solution is economical,feasible and effective,and can implement the technical transformation of the power distribution system.