The Study Of Protection Strategy Of Complex Multi-supply Distribution System

With the increase of environmental awareness and the shortage of energy, wind power, photovoltaic and other new energy is applied more and more in order to reduce the use of disposable energy. At the same time, place power cogeneration has been added, which changed structure of the distribution network radiation structure of traditional, and also means the protection of traditional distribution system may not be able to meet the requirements of the complex distribution system based on, so the study of protection of multiple power supply is very necessary.The input and exit of distributed power trend will have a very big impact on the grid, this paper will according to the thinking of the theoretical analysis of distributed power to exit the fault componentâ†'experimental simulation verify the theoretical analysis resultsâ†'adaptive protection technology to achieve protection settingadaptiveâ†'the experimental simulation adaptive protection ideas, to achieve adaptive current protection of the power distribution network with distributed power. The main work and results are as follows:1) Introduced an integral part of the distribution network with distributed power theory and the mainstream of several distributed power, provide a theoretical basis for the object of this paper which contains a variety of distributed power complex distribution network;2) Get the results from the fault theoretical analysis of the system model for this article. Build the model of this system in MATLAB2007b, select a different point of failure simulation, through the simulation results obtained to verify the theoretical analysis, through the simulation results prvoe that the adaptive adaptive protection superiority;3) Based on different fault location, constructing the corresponding fault network analysis model, the application of the adaptive protection theory out of different fault location down every protection in the self-adaptive current setting expression, and use differential Fourier algorithms for fault component filtering for setting valuem. Through the simulation results prvoe that the adaptive adaptive protection superiority; 4) Finally, make a summary of the whole paper, and put forward some prospect of further research.