Harmonic Elimination Scheme Comparison And The Analysis Of Economic Value

Modern electricity loads appear more and more frequently in intelligent buildings,industrial buildings,traffic hub,etc.The loads have been brought convenience to production and living,but also caused power quality problems in the power distribution system.Such as the application of inverter,rectifier equipment may produce a large number of harmonics,sensitive equipment such as running motors cause low power factor,and power equipment start-stop phenomenon leads to voltage sag.All the problems will reduce the usage of the electricity economical efficiency,increase the cost,and suffer operating losses.This paper starts from the quantitative analysis of a single circuit to the whole net,which is based on the inductive actual test data of power quality.After the simulation work,the essay puts forward a technical method of solving power quality problems at the end of the distribution network.That is the optimized configuration scheme which uses harmonic distortion rate and the economic cost as the function of governance device.The thesis uses the simulation software MATLAB and PSCAD in the research of harmonic source will overlap interference problem,the effects of different equipment management,optimizing the allocation of control device.This paper combined with the industrial production of the different kinds of typical harmonic source loads waveform features,and study the harmonic source in the amplitude,frequency,phase change of the harmonic spectrum.Then the impact of the harmonic on the power distribution equipment and electrical equipment are discussed.Several kinds of power quality management equipments are analyzed include single-tuned passive filter,shunt active filter,series active filter and active power factor corrector(PFC).Finally in the economy framework of power quality,the economic cost of power quality is analyzed.The main content is optimizing the allocation of shunt active power filter(APF)and the location of the reactive power compensation problem.For the goals,an effect evaluation mode is established by MATLAB to research the results of the elimination equipment at the end of environmental.A simulation method is adopted summarizes the governance cost of equipment investment and the relationship between capacity and compensation ability.