| Aiming at the nonlinear load in power grid and the perceptual load caused by the harmonic and reactive power problem,how to effectively filter out harmonic and reactive power compensation has important practical significance. Passive filter as filter means having a low-cost,mature technology advantages. The passive filters used alone or reactive power compensation device is difficult to meet the needs of harmonic suppression and reactive power compensation. On this basis, this paper proposes passive filtering and dynamic reactive power compensation system design. The specific content of this paper is as follows:(1)Passive filter design and dynamic reactive power compensation system structure,analysis of the structure and working principle of passive filters.Based on the double tuned filter design passive filter,using two magnetic control reactor to replace the traditional fixed reactor.Analysis of the structure and working principle of dynamic reactive power compensation device,choose the switching time of thyristor for capacitor(TSC)selected and control strategy.(2)Based on the analysis of the principle of dual magnetron reactor tunable filter.The influence of inductance on the resonance frequency are discussed,to select variable reactor device and its control strategy,conduct a detailed analysis of the sample processing reactive power and harmonic current detection method.Respectively, based on MCR double-tuned filter and TSC device control system design.(3)The use of MATLAB platform for modeling and simulation,by adjusting the value of the two reactors to correct the double-tuned filter because the fundamental frequency,capacitance value changes due to detuning.Harmonic current, harmonic distortion, power factor of each device were compared before and after the investment.Through the simulation analysis of the whole structure of system,verify the feasibility and rationality of the passive filtering and dynamic reactive power compensation device. |
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