分析了风光储联合发电技术在500 kV变电站站用电系统中应用的可行性，设计了不同的应用方案。风光储联合发电系统作为变电站站用电系统的备用电源目前不具有可行性，但可以作为应急电源。风光储联合发电系统为变电站提供应急电源，既充分利用了环境资源，又提高了变电站站用电系统的可靠性，在突发故障全站停电时可以保证重要负荷的供电。

The feasibility of application of wind-photovoltaic-energy storage (W-PV-ES) hybrid power generation technology in the station power system at 500 kV substation was analyzed and different schemes were designed. At present, the W-PV-ES hybrid technology is not suitable for the backup power system but can be used in the emergency power system. The W-PV-ES emergency power system can make full use of the nature energy source, improve the reliability of station power system, as well as supply power to the key equipments when all other power is lost.