500 kV变电站站用电源设置方案比较

变电站站用电源的设置方案关系到变电站工程建设投资、运行的可靠性和经济性。目前,站用电源的引接方式有主变低压侧母线引接、站外低压专线引接、站外低压线路T接、高抗抽能线圈和站内高压母线上引接等。这几种引接方式没有绝对的优劣之分,应根据变电站的性质、地理位置及当地电力系统的状况合理选择和组合,既节省投资,又保障变电站安全可靠运行。

Comparison on Configuration Options for Local Power Supply at 500 kV Substation

The configuration options for station power supply at substations have direct relation to the construction investment,operation reliability and economy of the substation projects.At present several leading wiring modes used for the station power supply include bus leads at LV side of the main transformer,special leads at LV side outside the station,T-connection of LV line outside station,high-impedance extracted coil and leads from HV bus at station.These modes have no obvious differences in advantages and disadvantages and they should be selected rationally and combined according to the natures, geographical location of the substations and local power system in order to save investment and guarantee the safe and reliable operation of substations.