Research Of Automatic Quasi-Synchronization Device With Dual-CPU System Based On Fuzzy-I-Control

Synchronization manipulation of generators is quite essential in the operation of power system. In order to operate correctly and parallel rapidly, it demands higher reliability and stability to ensure it secure. With the growing of the power system, it is necessary to promote the technology of automatic control in power system. The automatic synchronize device, being used for synchronization operation, is strictly require reliability, accuracy and rapidity.In this paper, having analyzed synchronization theory and present device, the main function requests that the device need have are presented, which is indispensable to develop the new microcomputer automatic quasi-synchronization. An in-depth study has been carried on aspects of reliability, stability and performance-price ratio of the device during the period of device development.According to the electricity character of synchronization point, correct mathematics model of switching angle is built. The predicted method of switching time can make close without impact in the first slippage cyclic, when frequency difference and voltage difference are acceptable. The basic theory of fuzzy control is also introduced in this paper. A consideration of non-linearity, time-variation and lag of water turbine, Fuzzy-I-Control algorithm is adopted for adjusting the frequency difference and voltage difference in synchronization course. It can eliminate steady-state error, so the adjusting course gets into steady. The emulation of algorithm has been taken by MATLAB. The emulation result and the experiment have confirmed it effective.To meet the needs of the high reliability of large-scale water turbine switching in power line, the dual-CPU system structure is used in hardware architecture. When the working CPU system goes wrong, the device automatically switches to the standby processor system. This running pattern can strengthen the installment reliability. The motherboard, consisting of the Single-Chip computer, is bus-in-chip system. Its structure is simple, succinct and better performance of electromagnetic compatibility.This synchronization device, which is based on two Single-Chip systems whose bus is within chip, can achieve acquisition, adjustment, communications and track record and etc. Opening design idea has been utilized when designing. It has the characteristics of simple structure, accurately action, fast speed, anti-interference and reliability and etc. It has been tested by organization concerned. The solution and algorithm presented in the paper are proved correct and effective in practice.