Design And Development Of Reactive Power Compensation Network Control System Based On DsPIC

Reactive power compensation is effective on improving the power factor and reducing line depletion, but the traditional reactive power compensation devices in china are divided. They can not monitor or control the whole system, or meet the requirements of power-automation with the low arithmetic capability. A reactive power compensation network control system based on dsPIC is designed in the paper to solve those problems.Firstly, by analyzing the research situation and developmental tendency of reactive power compensation, the disadvantages of traditional reactive power compensation and advantages of using dsPIC on reactive power compensation network control system are presented.Secondly, the supporting technology of reactive power compensation network control system is researched, such as reactive power compensation control by voltage or reactive power, and other two strategies, FFT sampling and CAN bus. Then the structure of the whole system and the design of slave nodes and host computer platform are proposed.Thirdly, the design and development of slave computer is presented, and the hardware and software of it is analyzed in detail. The signal detection and processing module,CAN communication module and complex switch export module are given. Software flow chart of slave computer is proposed and the improved control strategy with reactive power factor and voltage is analyzed in detail. Then the optimum position of slave computer devices in different tidal current distribution is pointed out in use.Fourthly, the composition and structure of host control system is given,including the module of the man-machine interface, communication interface of remote detection and control ,and the process of inputting and checking data in SQL Server 2000 database, to meet the functional requirements of host computer control system. The networking of reactive power compensation is realized.Fifthly, the system takes a protection action test and an on-line test on the designed platform, and the test results are introduced. The data of test is analyzed in detail and errors of the soft and hardware design are presented.With the testing data, it can be seen that the designed system has realized protection under the condition of phase failure, shot-voltage and overt-voltage. The power factor of system and load ability of distribution network is improved; the loss of power grids is reduced; remote communication and data display of reactive power compensation is realized, so the designed system has achieved the anticipated result.