The Design And Research Of Generator Wave Filter Based On The APF And Zig-zag Technology

With the fast development of science and technology,more and more electronic products are widely used in the controlled field of industry. The application of a large number of electric equipment not only put forward higher requirement to electric energy quality, but cause the serious wave in harmony to pollute to the power system.The formulation of a large amount of inactive power has caused great dangers to the electric apparatus and network of power transmission and distribution. So improving voltage quality,and controlling the pollution of wave in harmony become the problems of power system to be solved urgently. As the new electric and electronic apparatus compensated the pollution control of wave and inactive power in harmony of power system, active electric wave filter APF (Active Power Filter) is a new electric and electronic device that is used to suppress the dynamic harmonic, There is an important theoretical research meaning and actually use value to the research of APF.Based on the study of harmonic principles and common management strategies, the thesis analyzes active electric wave filter, further investigate the structure, principle and function of the active electric wave filter,and have explained the superiority and dependability of APF as the compensating device and analyze, prove the measure algorithms of the wave in harmony based on instantaneous inactive power theory, propose the harmonic detection method of APF based on p-q algorithm, combined with digital signal processor DSP for software and hardware design, realize high-speed, high precision detection for harmonic current with p-q,and sample, compute, control the output duty cycle and so on. Through creating simulation model by MATLAB,the thesis analyzes the filtering ability of the filter under the non-normal condition of the generator outputTo the question that the humorous wave of Line zero exists in the system of power transmission and distribution, the thesis researches the effect of the zig-zag technology for the suppression of zero sequence harmonics.The thesis adopts the zig-zag technology to suppress and control the harmonic waves and propose the superior performance of using the zig-zag technology for the suppression of zero sequence harmonics.The control of APF DC voltage is one of the key technologies for APF. The filtering function of APF depends on the APF DC side voltage expect the harmonic detection. This thesis researches the control method of the APF DC side capacitor voltage based on the fuzzy PID.The effective control of the APF DC voltage greatly improvesthe ability of the APF filter function.