Research Of Automatic Quasi-synchronization Algorithm And Device Of Synchronous Generators

Automatic quasi-synchronizing is an basic operation in the power system. It request the frequency difference,differential voltage between the generator and the grid in allows conditions,when the phase difference close to zero or in allows conditions, the device sends out the dictation to put the dynamoin to the power system smoothly and rapidly. ensure minor current in the armature winding of generator, avoiding the impact to the coupling shaft. With the progress of science and technology, Because modern quasi-synchronizing devices develop to high stability and computer automatic control. So, my work about simulation and design application research is base on microcomputer automatic quasi-synchronizing devices.In order to further understanding the principle and process of automatic quasi-synchronizing, Based on MATLAB/Simulink software, this thesis set up a detailed simulation model of automatic quasi-synchronizing of synchronous generators, including: the model of no-load synchronous generator,the model of Machine infinite-bus system,the model of excitation system,the model of turbine and regulator, the model of automatic quasi-synchronizing devices. Making the experiment of the automatic quasi-synchronizing process simulation base on all of the modle.This thesis research the algorithm of automatic quasi-synchronizing, Grey prediction algorithm is introduced to quasi-synchronizing control systerm, Established automatic quasi-synchronizing devices based on the grey prediction model by Using the improved GM(l,l)model.and making simulation experiment base on machine infinite-bus system,Frequency wave system to inspect the effects. Simulation results show that, Grey prediction can effectively judge the switch on opportunity, speed the peocess of quasi synchronizing. In the frequency wave system, Grey prediction of quasi synchronizing improve the switch on effect.Designing a automatic quasi-synchronizing devices of synchronous generator by DSP, design the control circuit of the device, including signal preprocessing circuit of AD sampling,frequency detection circuit,the switch quantity in/out circuit and pulse amplifier circuit etc. Software of automatic quasi-synchronizing devices system is programmed by C and assembly language under the developing environment of CCS2.0 (Code Composer Studio) produced by TI company.