Research And Application Of Hybrid Active Power Filter In Harmonic Elimination Of Nanyang Lake Substation

With the rapid development of China's industry and economy,a large number of non-linear equipment are put into operation,resulting in large power harmonics in the power grid,which seriously reduces the quality of electric energy and affects the safe production of users.At the same time,it also produces stable operation of the power grid.A bigger threat.The substation is an important node in the regional power grid,which supplies power to the regional power grid.In order to effectively control the harmonic problems in the regional power grid,harmonic concentration compensation can be performed in the substation.To this end,this paper will use hybrid active power filter(HAPF,Hybrid active power filter)to compensate the harmonic current in the 110 k V Nanyang Lake substation,thereby improving the user's power quality.In the process of research,the basic structure and power quality of the 110 k V Nanyang Lake substation are analyzed in detail,and HAPF is used to centrally control the harmonics.Secondly,it analyzes the basic structure of HAPF,analyzes the existing advantages and disadvantages of HAPF basic structure,and selects the appropriate topology.Secondly,the basic principle of HAPF is analyzed.After comparing and analyzing the advantages and disadvantages of several existing HAPF structures,the appropriate topology is selected,and the existing centralized harmonic detection methods are compared.The ip-iq detection algorithm detects harmonic currents in the substation.Then the HARPF harmonic compensation and resonance suppression capability are analyzed.The corresponding mathematical model is established by the single-phase harmonic equivalent circuit.At the same time,the HAPF resonance suppression ability and harmonic compensation ability are analyzed when the grid frequency and inductance value change.To ensure that HAPF can work reliably and reliably during operation.Finally,the overall design of the hybrid active power filter device is designed.The design content mainly includes the overall structure,hardware part and software part of the system,and the corresponding experimental platform is built to verify that the designed system can effectively compensate the harmonic current.After verification,it will be put into operation in the substation to compensate the harmonics in the substation,and the efficiency of the device after commissioning will be analyzed through data comparison before and after the operation.