Adaptive Coordination Protection System Based On MAS

With the expansion of China’s power grid scale, local fault in the power system may affect the range more widely, and the damage will also increase. Therefore, cooperation and coordination within the power system protection between the various proposed higher requirements. Traditional power system protection devices used a fixed setpoint to deal with the various operation conditions of power grid setting analysis, and the method usually used local information as a criterion for the protection of actions. When the power grid operation mode dramatic changes, the protection setting value is difficultly to match with the current power grid operation mode, in severe cases even cause protection tripping or malfunction, resulting in a large area blackout. So, analysis the grid current operating state, adaptive real-time seting and adjustment protection setting value, so that the protection is in the best operating condition, and ultimately the fast, reliable, precise excision the fault is becoming the main contents of the current study.In this paper, through the research of relay protection development present situation at home and abroad, analyzes the traditional relay protection method, summarizes the key problems to be solved at present. Combined with the power grid real-time running status, put forward the adaptive coordinated protection method based on MAS. Considering the complexity of network structure, the paper in order to reduce the time of the topology analysis, use sparse matrix techniques to optimize the power grid network topology, so as to improve the speed of analysis and calculation, and to reduce the data storage space. Meanwhile, this paper MAS stratified system partition processing, making the system decentralized computing tasks, and the time required for each calculation will also be reduced, thereby further improving the computational speed of the system. In order to avoid overload protection devices in the system malfunction occurs under fault conditions, the use of power flow calculation method for allocating forecast, anticipation ahead of the fault line, in order to ensure the correct operation of adaptive relay protection.The paper based on the 35 k V transmission system as a model, the MAS adaptive coordinate grid and the protection of traditional current protection to be compared.Analysis the topology of the transmission line, and when a line to line fault occurs, the system according to the method of power flow distribution forecast, prejudgment of fault occurrence sequence analysis, application of multi Agent technology decision on the fault, and finally use the adaptive protection action of the fault. Research shows that the coordinated adaptive protection MAS power system can not only improve the computing speed, but also can make the system reliability enhanced.At the same time, the protection device to prevent malfunction and refuse has been significantly improved.