The Research On Driving System Of The Reactive Power Compensator

Thanks to the rapid development of modern technology, numerous power electronic devices and the new electricity with sensitive components come up. On one hand, this brings about the distribution of the harmonic pollution, cutting down the quality of electric power and enlarging the cost. On the other hand, it also pushes up the power quality requirements, which must adopt some measures for transmission network of reactive power compensation, so as to improve the power factor and power quality. Thus, the reactive power compensation techniques emerged.Summarizing the development and the orientation of the domestic and foreign relevant reactive power compensation device and the related application of the technology, I found that there are several drawbacks in the current-using of reactive power compensation, such as big harmonic wave, poor controllability, which may cause low reliability. After summarizing the existing related technology of my laboratory, this thesis described a newly reactive power compensator-- the reactive power compensator based on variable reactor. What's more, the thesis elaborated the principle and structure of it. This thesis made the following:Firstly, the thesis described reactive power compensator based on the variable reactor, which include fixed capacitors, variable reactor, and intelligent controller reactor. The variable reactor includes variable circuit reactance converter and power electronic power converters. This kind of reactive power compensator is innovated from the traditional reactive power compensator in structure, which divided it into the primary coil and secondary coil. The resistance value of the latter can be changed through changing the resistance value of the former.Secondly, the thesis was researching and designing the driving part of intelligent controller of the IGBT-type reactive power compensator. Based on analyzing the theory and topology of the reactive power compensator, the thesis expounded the controlling of IGBT-type reactive power compensator. After analyzing the necessary characteristic of the drive system, a DSP+CPLD driving-method was chosen, which including the design of power supply module, the clock module, signal processing module, interface module, protect module, the hardware circuit driver module, etc. Finally, the thesis established the simulation model of reactive power compensator for IGBT-type reactive power compensator. The simulation results prove the validity of using PWM waves to control of IGBT-type reactive power compensator.