Research On The Algorithm Of Operational And Dispatching Reliability Of Power Network And Software Implementation

With the development of power system and the emerging of power market, the operation of power network is nearer to its limit than it is before. The evaluation of current security and reliability of the system is important and necessary.In this paper, principle and calculation methods for reliability evaluation are discussed. According to the features of on-line application, this paper found the reliability assessment models of power transmission network. An algorithm integrating the fault enumeration and probabilistic sampling is established and carried out by parallel processing. In the proposed algorithm the features of power network operation and dispatching are adequately considered. The regulating speed of generating equipment is simulated. And several dispatching strategies are offered. This paper also simulates cascading failures caused by power flow transferring. The hidden risks of power network operation are fast searched by means of the comprehensive analysis of faults consequences and probability of occurring. The set of serious fault modes is automatically refreshed. The risk indices are built in three layers, i.e., in systematic, regional and load node layers. And the risk information of power network is distributed on webpage.A database using in operational reliability assessment of power network is built in this paper. And a simple and practical software interface is designed. The practicality of the proposed algorithm and stability of the software are verified by the calculation results of IEEE RTS test system and a large-scale regional power network.