Research On The Intelligent Excitation Control System Of Synchronous Generators

With the development of the theory of science and technology,the scale of power grid and the quality of power supply are becoming more and more demanding.The control theory has been more and more applied to excitation control,and achieved good results,so that the hydropower technology has greatly improved,the microcomputer controller of synchronous generator variety was born,and gradually replace the analog excitation controller.But most of the hydropower plant excitation control are relatively simple,functional extensions need to increase the number of peripheral devices,there is a compatibility issue between multi vendor development,water machine automation has brought a lot of inconvenience.In this context,this paper puts forward a kind of using genetic algorithm to optimize CMAC and PID type parallel excitation control algorithm in MATLAB by M function algorithm to achieve,through the research on the feasibility of the algorithm simulation,and compared with the traditional control algorithm,and the perturbation in the case,comparison the difference between the two control algorithm of anti-jamming capability.The experimental platform is closed loop control with STM32F407 as the core.On the basis of introducing the principle of the excitation control system,this paper introduces in detail the hardware circuit and the software realization method designed in this paper.Including the composition of the experimental platform,the analog sampling circuit,synchronous signal measuring circuit and so on,and the system debug procedures,synchronous sampling,signal measurement,power calculation,SCR pulse signal output,capture frequency measurement etc..Finally,the trigger signal waveform of SCR in excitation system is obtained by oscillograph.The software is implemented in C language,including the main program ideas,the implementation of sampling algorithms,frequency measurement and timing interruption,and so on.In the aspect of human-computer interaction,the designed LCD circuit board is used to replace the traditional button.The setting of parameters is more convenient,easy to operate and easy to maintain.