Analysis And Adaptive Protectiong Of More Power Distribution System With Distributed Generation

The safe and stable operation of the power system is the national economy and society theimportant basis of the people’s livelihood. Protection of power system is an extremely importantaspect as the quality and scheme of protection decides system reliability, controllability andstability, cogeneration of power is also widely used in the client. However, more and moredistributed energy to penetrate to the distribution network system with the development of thedistributed power generation, which change the traditional distribution network of single radiusstructure, it means that based on the traditional protection mechanism may be with failure,therefore, the application in the distribution network adaptive protection to have the importantmeaning.A significant increase in the penetration of distributed generation has resulted in apossibility of operation of distributed system with distributed generation, This paper studied thecomplex electronic systems which contains wind farms and thermoelectric power factory, whichfollowing the idea of “Build system model→System failure analysis→the application of theadaptive protection→Simulation prove→results analysis”. realize adaptive protection applied tocontain the power distribution network distributed power more.The main work and achievements are as follows:1) are frequently used in wind power generator used the advantages and disadvantages ofthe model is studied in this paper according to choose the appropriate wind generator model, andthe mathematical model and control mode analysis for the whole distribution network modelanalysis to provide the theory basis;2) Eatablish the distributed power moer than the power supply with power distributeionnetwork system model in this paper, it is concluded that the theoretical analysis of the circuitprinciple diagram, and constructs the Matlab/Simulink simulation model. Explore wind farms tothe influence of the access system, analyzes on the whole distribution network fault position ofinfluence, especially line fault current and the influence of busbar voltage, and through thesimulation results prove the correctness of the theory analysis;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 downevery protection in the self-adaptive current setting expression, and through the simulationresults prvoe that the adaptive adaptive protection superiority;4) Finally, make a summary of the whole paper, and put forward some prospect of furtherresearch.Simulation results show that the theoretical analysis in the paper is effective.