With the gradual improvement of the rack of power distribution system and the requirements of broadcasting station for uninterrupted power supply, closed loop operation mode is introduces into power grid dispatching operation, so as to ensure the normal maintenance and load transfer and not affect the continuous power supply to the radio.%随着配电系统网架的日趋完善，以及广播电台对不间断电源的要求，电网调度操作引入合环运行方式，从而保证了正常检修、负荷转移过程中，不影响对广播电台的连续供电。
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