Stability Control Strategy Study Of Large Power Grids Under Extreme Fault Conditions

The paper is based on the trend of network stability control decentralized collection, coordination of scheduling and centralized control as well as the ultra-high pressure and long-term practical experience in running the front line. By introducing the traditional underlying mathematical model, the paper presents a new control strategy as well as its control model and optimization algorithm, which can get into entirely in a short term, and can be able to make macro-control in the respect of the entire network. The control strategy, which is used in extreme failure situation in the system, is based on the scope of the steady-state energy balance principle. It takes emergency control in the system both after the failure or failure in the development, enabling the damaged system to resume to the stable state of the operation.In aspect of enhancing the effectiveness of numerical calculation, in order to greatly reduce the computation of system stability analysis model in power system fault conditions, according to the characteristics of the power system and fully taken into account the characteristics of the power system, the paper, which has refers to heuristic algorithm such as particle swarm optimization, fish-swarm algorithm, ant colony algorithm and so on, tentatively puts forward the 'shopping' algorithm to narrowing the scope of the search while solving.At last, the paper takes advantage of VC language to build a simulation platform and take the classic example as a blueprint to verify its correctness. In the simulation stage, the paper takes transient phase of the simulation analys on Henan power network "6.25" incident and it proves the practical feasibility of transient analysis theory put forward by the paper. Secondly, having the real-time process and data of Hainan power grid collapse in 2005 as the background, by adding the control strategy, the paper has taken advantage of the simulation to replay the whole process of Hainan fault. From the results of the simulation, by using the control strategy in large power grids under extreme fault conditions which is put forward by the paper, in spite of the same as the real experience of reaptly consistent failure, the eventually adjusted Hainan power grid is still able to meet the parameters of the conditions of stable operation, so does the Hainan power is still in a good operation condition. Therefore, the power grid stability control strategy proposed by this paper, which has been well verified in the steady-state phase, is feasible.