Research On Injection Type Shunt Hybird Power Filters

IHAPF applies to harmonic dynamic governance of the pressure system and the highpressure system with a large capacity of reactive power compensation.IHAPF has beenwidely used for its active device due to withstand smaller harmonic voltage and reducing theuse of capacity, the investment and operating costs at the grid harmonic increasingly seriousstage.This thesis analyzes the compensation characteristics, control strategy and controlalgorithm of IHAPF.To establish IHAPF mathematical model based on analysis of the robust performance andharmonic suppression. The analysis shows that IHAPF has a strong robustness for changingthe grid inductance, and effective inhibition of the string between the passive of the gridimpedance, parallel resonant phenomenon to improve the filtering effect of the passive filtergrid harmonics can get a good compensation. This thesis details parameter design methodIHAPF in the parameters design. Active power filter performance depends largely on the highquality of the harmonic current detection and effective control method, so this thesis detailsharmonic detection algorithm and research analysis.The analysis of control strategies for inverter will repeat control algorithm is appliedIHAPF system to achieve the suppression of the harmonic components of the current Analysisof the repetitive control of the improved algorithm to ensure the accuracy of the invertercontrol and fast dynamic response. Compare simulation study using Matlab/Simulinksoftware and the simulation results demonstrate the effectiveness of the control method.