Research On GCFS Cascading Failure Early Warning Model And Design Of Decision Support Platform

With the rapid development of information technology,the popularization and application of Internet technology in various fields has brought new opportunities for the development of many traditional industries.At the same time,it has also brought a lot of challenges.A large number of intelligent power equipments are connected to the power grid,and the construction of large-scale power information network makes the integration of physical network and information network more and more in-depth,which brings convenience to the monitoring and control of power grid operation,but also improves the complexity of power network.Cascading failure risk is easier to communicate between two network systems.It increases the risk of blackout greatly.Therefore,it is urgent to study the control of cascading failures in power network information physical fusion system(GCPS).When cascading failures occur,whether early warning and appropriate mitigation measures can be adopted to control cascading failures is the key to ensure the safe and stable operation of power grid.At present,most of the studies focus on the evolution mechanism of cascading failures,and do not take the identification,early warning and control of cascading failures as a complete process.Firstly,this paper analyses the historical blackouts and finds out three key state factors in the operation data of cascading failures:basic network structure,physical layer factor and information layer factor.Subsequently,this paper proposes a fault path search process for cascading faults in power grid information physical fusion system.Based on the path search process,a cascading fault early warning model based on fuzzy theory is proposed.According to the probability and severity of the evolutionary path of cascading faults,the early warning level of cascading faults is determined.And the development process of the control and mitigation strategy is summarized and analyzed.Finally,based on the identification and early warning of cascading failures,the decision support platform system is analyzed and designed.The decision support process of fault control is designed too.,which can provide decision-making suggestions for dispatchers and operators when cascading failures occur.Based on the kev state factors of cascading failures,a knowledue base of cascading failures is established.It can mine the historical dispatching operation data of power grid.so as to identify cascading failures in advance and support decision-making.The function and architecture of the platform are designed in detail.