Abstract:Through the real-time monitoring and statistics of total load of each voltage level,power plant output and plant power,power exchanges with neighboring power grids and local power companies,and network loss in the dispatching automation system,the load management of the power grid can be strengthened, the distribution and characteristics of the power grid load can be grasps, the operation loss of the power grid is analyzed, and the safety, economy, quality and environmental protection level of the power grid are improved.The engineering calculation formula of 220kV-500kV voltage level line loss, transformer loss and network loss and the means of realization in the system are put forward.The statistics and query methods of average loss in any time range in the EMS system are put forward.Analyzing the characteristics of data acquisition in the EMS system,measures to improve the accuracy of network loss statistics in daily data maintenance are explored.Dealing with the deviation caused by data synchronization and sampling accuracy is conducive to the analysis of network loss indicators in operation control,to clear the principle of loss reduction and control measures.The purpose of improving resource utilization, increasing economic efficiency, reducing energy consumption and improving the environment is achieved.