Research On The Model Of Voltage Stability Of Power System Early-Warning Based On Artificial Immune

In recent years, in the world scope, it have been occurred many the voltage to lose steady and the voltage collapse accident, enabled the voltage stable problem become an important branch electrical of power system stable question. Already entered big electrical network, high voltage, big unit, the long-distance range electric transmission time in our country electrical power system, the electrical power system macro-horizontality interconnection and the efficient consideration tendency in the electric power market reorganization process, causes the system movement to approach its stable boundary, this aggravated the threat which constitutes to the power system safe operation by the voltage stability. In order to prevent the voltage loses steady and the voltage collapse accident, guaranteed the electrical power system safe stable running, it promptly needs to grasp the voltage stability of the electrical power system to have the vital significance. So long as the dispatched people fully understand the system voltage stability and has grasped the electrical power system voltage stable development tendency, it was allowed him to make the correct judgments, this is good prevented the large-scale power cut accident the occurrence.This topic is suppoted by Natiural Science Foundation Project of CQ CSTC (CSTC2007BB6171). In this paper principle of natural immune system is applied; model of voltage stability early-warning based on artificial immune is advanced; the problem about early-warring of voltage stability of the power system is studied.According to the system failure, the non-breakdown and the environmental factor have defined three groups of characteristics targets subset, the utilization relevance analysis and the fail-safe analysis principle, the indexes of voltage stability of the power system based on artificial immune are built. And the early warning system structure and function are elaborated.The model of voltage stability of the power system based on artificial immune is advanced by application of principle of artificial immune system for the first time.The voltage stability of the power system early-warning model is used for the actual power system, and the results are analyzed.