Design And Implementation Of Microcomputer Excitation Controller For Synchronous Generator Based On DSP

The excitation controller is the important component of the control system, and it has a significant meaning to the peace and steadiness of the power system. With the development of the large-scale integrated circuit and computer technology, the excitation controller in which the microprocessor is the core component will be the trend in the future. With the improvement and development in excitation's control method, the higher request in operation and calculation ability of excitation controller is put forward. DSP (digital signal processor), which has high-speed, remarkable ability in digital signals processing and abundant external expanded function, make its application expand from communication trade to the industry-controlled field. Under this background, this thesis studies the design and implement of microcomputer excitation controller for synchronous generator based on DSP.First of all, on the basis of expatiating the important function that excitation system played in the power system this thesis explain the framework of excitation system and excitation controller, the development of them, and the advantage of the computer excitation regulator. Prove excitation control theory make excitation regulator not only regulate voltage stability and allocate inactive power, but also have function of regulating the stability of the power network. Meanwhile, the relevant operation principles of the microcomputer excitation regulator are shown, and they offer the essential theory supporting in intelligent adopting PID (Proportion Integral Differential) +PSS (power system stabilizer) and non-linear control strategy to realize microcomputer excitation regulator. Secondly, the research subject is concerning the design of he whole hardware platform realizing the computer excitation regulator with DSP, which including power and reserve power module, sample module, the level matches module, expand SRAM and FLASH ROM module, SCI and CAN communication module, keyboard and LED show module, etc. each detailed design of module. Thereafter, have told and designed with the corresponding software module of hardware, including SCI communication module, CAN communication module, PWM produced module, FFT algorithm realized module. And PWM pulse and CAN data from communication transmit that faithful record prove feasibility of the relevant hardware and software design. Finally, the test data is analyzed by use of different debug and simulation methods. Compare the data resulted from FFT algorithm operating in DSP with the data resulted from running in MATLAB and analyze them, draw data from simultaneous sampling that the faithful record, emulate PID Controlling algorithms with MATLAB, gets exactly parameter of PID. They have all proved the validity of the design. This paper is shown that it is feasibility and validity that implement microcomputer excitation controller for synchronous generator based on DSP from the theory and whole realization result of software and hardware. The research work is significant in the future.