The PRS-3000 power distribution automation system completely follows IEC61970/IEC61968, which can be used to import models and graphics, and provide interfaces and data interaction with other systems. The system spans the operating systems of Unix, Linux, and Windowswith such a hybrid environment ，it can ensure higher security and reliability.

Thelocalized-centralized combinationallayered composite protection method is adopted to upgrade the protection level from point protection to surface protection, forming a theoretical and technical system for security early warning and defense of intelligent power grid.Thequick judgment method of power grid and the early warning index system are used to classify the operating state of power grid, andbysearching for a reasonable cut set of the quasi splitting oflarge power grid online, the fault areacan be finally reduced.The whole solution can meet the requirements for fault judgment, accurate isolation and rapid self-healing of sections or equipment in distribution network line, so as to realize self-perception, self-diagnosis, self-decision, and self-recovery of the intelligent power distribution network, and improve the operational reliability of the power distribution system.

Distribution automation advanced application (DPAS) is a powerful tool for dispatchers and planners to simulate, analyze, monitor and controlthedistribution system. The PRS-3000 distribution network system DPAShas themain functions to optimize the economic operation mode ofentire network, analyze the security of power grid, and reduce or eliminate unsafe factors of power grid, whichis an important new functional module in the power distribution management system. Byfully considering the difference between the distribution network and the transmission network, the advanced applicationhas developed several practical algorithmsaccording to the structure and operation characteristics of the distribution network, mainly including network topology, state estimation,load flow calculation, fault analysis, recovery control, and network restoration.