Design And Application Of Micro-grid System On Station Power In LiZhou Substation

With the development of photovoltaic,wind power and other renewable energy power generation technology,distributed Generation(DG)is becoming an effective way to meet the demand of load growth,it improve energy efficiency and improve power supply reliability.It has been widely applied in distribution network.Micro-grid technology of substation provides a flexible and efficient platform for the integration and utilization of distributed generation technology and renewable energy generation technology.Based on the actual situation of 500 k V Lizhou substation in Chaoyang City,Liaoning Province,this paper puts forward the design scheme of the substation power microgrid system.Considering the characteristics and properties of the substation power load,the AC grid-connected mode is adopted.Through the research and analysis of the distributed generating units and energy storage devices,the lightning protection grounding scheme of the equipment is determined and the lightning protection grounding scheme of the equipment is determined.According to the operation mode of micro-grid system,the corresponding control strategy is determined.In view of the natural resource conditions and load demand characteristics of substation.This paper completes the configuration scheme design of the micro-grid system,including the configuration of each part of the system,system operation mode and control and protection,in order to realize the functions of the micro-grid system.Micro-grid control system is used to monitor the operation data of existing distributed generation,and can adjust the control status and operation strategy.The application of several key technologies in Lizhou substation micro-grid system can ensure the on-line state switching of the whole equipment and the uninterrupted power supply of the important loads;at the same time,it can improve the speed and quality of data collection,ensure the real-time monitoring of the electrical parameters of the equipment and key positions,and accurately locate the fault location and fault type.The construction and operation of substation micro-grid system in Lizhou substation show that the application of micro-grid technology in substation power consumption can not only save the construction cost of substation backup power supply and obtain actual benefits,but also ensure the reliability of power supply for key loads in substation and improve the ability of substation to resist risks.