| Zhaoqing district grid existing 110 kv and above, including substation total 71 seat 110kv substations 64 seat, basic adopts closed loop design, open loop operation mode, JuShu 110kv substations basically are installed have automatic switch device or circuit for maintransformer for switch device. Prepare automatic switch device used in power system ofsubstations and important user substation inside, increase in power supply reliability receivefull affirmation. But as partition fragmentation power grid is concerned, the area for automaticswitch device control strategy must be conducted for local power grid study separately. Thispaper saddled automatic switch device operation situation of 110 kv substations is proposedfor the standby power auto-switching units wide-area control strategy, ensure the grid security,improve the power network operation reliability.
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