Reactive Power Optimization And Harmonic Suppression Strategy In Substation

In recent years,the wide application of non-linear equipment such as power electronics has made it the main harmonic source of the power system,and at the same time it will consume a large amount of reactive power.As an important part of the power system,substations have important engineering significance for reactive power optimization and harmonic suppression.This paper first elaborates on the basic principles of reactive power optimization and harmonic suppression,including the necessity and common methods of reactive power optimization and harmonic control.The harmonics are analyzed based on the study of typical harmonic sources such as traction substation locomotive load,operating principle and structural characteristics of the intermediate frequency furnace,and a mathematical simulation model is established to analyze the causes of harmonic generation and the corresponding characteristic harmonics.Aiming at the multiple harmonics generated by the integrated harmonic source of the substation,taking into account the site constraints,harmonic characteristics,and economic constraints of the substation site,this paper adopts a passive filter-based filter and reactive power compensation scheme.Through the analysis and analysis of the actual measured data of the substation,it is concluded that the damage of the supplementary capacitor is caused by a large number of harmonic currents injected into the high-pressure side of the nonlinear load.In order to improve the voltage quality of substation,reduce the harmonic level and ensure the economical efficiency of electrical equipment,this paper makes use of ETAP's best capacitor position module to optimize the capacitor position selection,and compares the optimization result of capacitor position with the optimized compensation capacity of the filter.Filtering effect,compensation performance,and economy;Finally,the filter parameters of the two optimization results were simulated and compared.Finally,the filter compensation device was installed on the 10 kV side to reduce the harmonic voltage level of the substation.Load power factor to improve the operating environment of electrical equipment in substations.This paper takes the design of 110 kV substation reactive power compensation and filter device system as the research background,and chooses the best compensation position from three aspects: filter performance,economy,and optimization planning of reactive power compensation device.Through simulation and comparison analysis,the reactive power compensation and filtering scheme is determined,and the problem of frequent damage to the compensation equipment of the substation is finally solved.Finally,the feasibility of reactive power compensation and harmonic suppression strategy is verified,and the improvement basis for optimizing the matching of capacitors and filter inductor parameters is provided.It provides a theoretical basis for the study of improving the voltage quality problems caused by nonlinear loads,and has a certain practical reference value.