并联型直流电源在110 kV变电站的应用

Study on the Application of Parallel DC Power Supply in a 110 kV Substation

与传统串联型蓄电池直流电源不同,并联型直流电源采用新的设计思路,提高了可靠性,并可远程在线核容,免去了周期性的现场放电工作,为变电站直流系统增添了另一种选择。介绍了并联型直流电源主电路原理、并联型电池模块工作原理、核容工作原理,对比了串联型、并联型直流电源系统的优劣,结合并联型直流电源在某变电站的应用,开展了相关试验工作,并制定远程遥测策略,实现了蓄电池的远方在线核容及其可视化,为开展直流设备状态检修提供了重要手段。

Different from the traditional series battery DC power supply,the parallel DC power supply adopts a new design idea,which improves the reliability,has remote online core capacity,eliminates the periodic field discharge work,and adds another option to the substation DC system.In this paper,the principle of the main circuit of the parallel DC power supply,the working principles of the parallel battery module and the core capacitor are introduced,the advantages and disadvantages of series type and parallel type DC power supply system are compared,relevant experimental work has been carried out based on the application of parallel DC power supply in a substation.What’s more,remote telemetry strategy is developed and the remote on-line core capacity of the battery and its visualization are realized,which provides an important means to carry out the condition maintenance of DC equipment.