The Design Of Reactive Power Compensation Controller Based On ARM Processor

The fast growth of national economy has created a great demand for electric energy, and the reactive power required for electrical equipments continues to increase as well. The distribution of reactive power in power grid becomes more and more complicated, which will result in an appalling waste to electric energy. Based on these facts, the reactive power compensation in power system becomes a very important and significant research subject in power system and the field of automation.This thesis begins with an introduction of the realistic meaning of reactive power compensation to analyzes its necessity, then gives an outline of current research situation of the techniques of reactive power compensation at home and abroad, which is followed by a discussion of several ways to compensate the reactive power and underlying fundamental principles, hereafter makes a detailed elaboration on the hardware and software design of the reactive power compensation control system for low-voltage power grid based on ARM.With regard to the hardware design, AD's energy measurement chip ADE7758 will be used to acquire the power grid's parameters. Then combined with the application of LPC2134 of ARM7 series featuring high processing speed and pipeline organization, the whole system will be able for functions such as electric energy aquisition, data storage, malfunction alarm, automatic switching of capacitors, etc. Meanwhile, LCD is used to display the menu, which will provide a good man-computer interface to facilitate the inquiry of power grid's parameters and the setting of related parameters. In addition, this system is available for the function of U-meter-reading. For the data stored in the memory, U-meter is used to get them and background software is employed to process and interpret them. As a result, the reliability of the system further increases.As to the software design, ADS1.2, based on ARM development platform, uses the modular design method which puts driving-function of chips with different functions into different files. It is good for the software's modification and debugging. The reactive power compensation control system presented in this thesis has been applied to the practice which proves that the controller can measure and display the power grid's parameters correctly, and switch capacitors automatically according to the power grid's parameters. Its functions can meet the design requirements.