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针对部分钢铁企业自备电厂的发电机组容量、台数及供电网络容量不断增大情形下,在发电机出口或并网母线等处发生三相短路故障时其短路电流水平往往超过相关断路器的额定开断能力,造成故障情形下相关断路器开断困难甚至发生爆炸等严重后果。而在发电机出口或高压厂用电母线进线回路中串联高速开关同时并联限流电抗器的方法,则既可保证电力系统在上述各种故障情形下选用较低开断水平的断路器,节省电气设备投资、减少现有相关电网改造的停电时间,又可保证自备电站正常时的经济运行。
For some power plants owned by iron and steel enterprises, the capacity of generating units, the number of units and the capacity of the power supply network are constantly increasing. In the case of three-phase short-circuit faults at the generator outlets or grid busses, the short-circuit current level often exceeds the rated capacity of the relevant circuit breakers Breaking capacity, resulting in the failure of the relevant circuit breaker breaking or even the occurrence of serious consequences such as explosion. In the outlet of the generator or high-voltage power plant bus into the circuit in series with high-speed parallel switch current limiting reactor in parallel, you can ensure that the power system in the various fault conditions selected lower breaking level of the circuit breaker, Save investment in electrical equipment, reduce the power outage of the existing relevant power grids, and ensure the economic operation of the self-provided power station when it is normal.