Research And Implementation Of Parallel Hybrid Active Power Filter

With the development of industrial technology,the large number of nonlinear power electronic devices is used,resulting in more serious harmonic pollution in power grid,and the quality of power supply and operation safety are threatened.So the governance of harmonics is imminent.Active power filter and passive filter have their own advantages and disadvantages,and the hybrid active power filter composed of them can take up the two lengths,make up for both of them,reduce the cost of harmonic compensation,and at the same time,can improve the cost performance of harmonic compensation device.Therefore,the research of hybrid active power filter is of great significance.In this paper,a three phase parallel hybrid active power filter is used as the research object.First,the harmonic correlation definition,principle,research purpose and current research situation of hybrid oil source power filter are discussed.The basic principle,classification.The advantages and disadvantages of all kinds of filters are analyzed and compared,and the hybrid active power filter is analyzed emphatically.Secondly,the d-q harmonic current detection method and adaptive harmonic current detection method based on instantaneous reactive power are analyzed in detail.On this basis,an adaptive d-q detection method based on instantaneous reactive power is put forward.Finally,through MATLAB simulation software simulation model of each part of the shunt hybrid active power filter is designed,especially the power supply,the harmonic detection circuit,passive filter and load part,then the combination of each part of that the parallel hybrid active power filter is designed in this paper.Can effectively suppress the harmonic current generated by the load.