| The theme of the paper is researching and developing of a new kind of automatic quasi-synchronization device based on DSP chip. The paper has elaborated the important status of microprocessor-based automatic quasi-synchronization device in power system,exhausted the principles of synchronism, analysed the deficiency of handraulic and analogue devices. According to the real researching course,the paper has described the hardware and software designing ways. We have tested our device with equipment and the testing result is satisfying. In a synchronization course ,when the voltage-difference,the frequency-difference,the rate of change of frequency-difference comply with the requirements ,our device will grasp the first synchronization opportunity and plunge the generator into system with a smallest impact.
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