A Shunt Active Power Filter With Method Of Hybrid Control

The industrial application of active power filter is based on the development of power devices and power electronic technology, which has the advantages of power electronic devices that can compensate for drawback of passive filter.It is a detailed summary of the cause of harmonic, and the development history of active power filter. In particular, a number of active power filter technologys (harmonic detection, control and implementation of current technology) have been described in detail for industrial applications.Based on the summary of programs at home and abroad, the hybrid control active power filter is proposed.Through theoretical analysis and experimental results, the new program is demonstrated to have the feasibility and superiority. The investigated contents are shown as follows.1) This thesis has presented the operation principles of hybrid control active power filter. The novel active power filter is consisted of voltage source inverter and seriesly link reactor.Theoretical analysis shows that the active power filter is equivalent to a harmonic high impedance in series and low impedance in parallel to a harmonic current.2) In order to have good performance for harmonic and reactive power compensation, the mathematical model and control diagram of active power filter has been established. Based on the transfer function, the criterion of selecting the parameters of control system is discussed in this paper. And the steady-state performance and dynamic performance of control parameters are anlalyzed by the simulation tools.3) The aided circuits and control systems of the prototypes are discussed.This paper analyzes the status of power device's and points out the necessary of protection circuit. At last the infection of parameters of driver circuit to performance of device is analyzed.In this paper,the prototype's control board are made with of analog chip. Experiments are carried out on the device, and gives typical data and waveforms.The experimental results further verify that the hybrid control strategy is effective.