Optimization And Implementation Research Of The Detection And Control Algorithms For SAPF

Shunt Active Power Filter SAPF is the main trend for harmonic governance.In this paper, in order to meet the real-time,accuracy for harmonic compensation of SAPF,Mainly to optimize and realize the three part key technologies for SAPF,that is the problem of phase-locked for DQ detection,the problem of real-time for SVPWM control and the problem of resonance peaks for LCL filter.In this paper mainly to do the work of analysis-. improvement and implementation with respect to the detection technology、control technology and grid-connected inverter technology. In terms of the phase detection problem for DQ detection method,Proposed a single-phase digital software phase-locked loop PLL with robustness, that phase detection results are not affected by grid voltage distortion,which has a good adaptability to grid;In terms of the real-time problem for traditional SVPWM control, Proposed a optimized SVPWM algorithm.Traditional SVPWM algorithm has the characteristics of high effective rate, low dissipation and good dynamic performance, on the basis of these advantages,Put forward an improved calculation method which has a high computing speed,in order to improve the real-time of harmonic compensation;In terms of the resonance peaks problem for LCL filter,Proposed a RC parallel LCL damping method with the characteristics of high damping, low loss, low cost, good filter characteristics etc,in order to improve the waveform quality and system efficiency for grid-connected SAPF.At the same time proposed the optimization key technologies in this paper, Conduct the MATLAB simulation,DSP programming, prototype testing,In order to make sure the feasibility of each improved program and the actual effect of the SAPF for dynamic harmonic suppression.Research findings of this paper,provide a theory basis for realizing harmonic and reactive power dynamic compensation of coal mine effectively.also has a certain practical value and important research significance for cleansing distortion grid as well as improving system quality.