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With the promotion of energy-saving technology and automation technology , power electronic devices such as converter equipment , frequency conversion device capacity expanding , an increasing number of high harmonics in the power grid is becoming more and more serious . Harmonics on power system security , stability and economic operation posed a potential threat to the electrical environment , harmonic has been considered a major hazard to the grid , power system harmonic pollution and governance , has become the research focus of the scientific community of the past two decades electrician , and the emergence of a lot of good research . Through learning and understanding , the majority of existing research and theoretical articles is introduce harmonics governance methods , and harmonic analysis methods papers are generally for large-scale power system analysis and research , these harmonic analysis methods usually make use of harmonic wave mathematical model of the network ( the harmonic network node admittance matrix) analysis , due to the asymmetry of certain components in the power system , making complex mathematical model , the calculation is extremely tedious , therefore , generally combined with a computer is used to analyze large power system . Relatively simple power system harmonic analysis and harmonic filtering works , be able to find a simple , but also meet the needs of engineering practice , most electricity users need . It is precisely this purpose , the papers use a simple and practical method of harmonic analysis harmonic impedance method , this method is simple in principle , easy to apply , especially suitable for industrial and mining enterprises grid harmonic analysis and governance . Reality the papers from the scene of the subordinates of Guizhou Branch of China Aluminum electrolytic aluminum plant grid harmonics measurement and analysis , according to the measurement results , the design of passive power filter governance harmonics several options , with the harmonic impedance method filter power system harmonic analysis , to filter system harmonics governance effect . The paper also using MATLAB / SIMULINK simulation , by comparing the simulation results and analysis of the results is consistent , thus indicating that the method can be applied to harmonic analysis works correctly .
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