Harmonic Testing And Analysis Of Shuangliu Airport Power Supply System

The airport is an important part of the transportation network and the security of its power supply system is of great importance.The first consideration of the reliable operation of the airport is the stability of the power supply system.With the advancement of science and technology,the degree of airport automation and the accuracy of the equipment are getting higher and higher,making it necessary for power security with higher power quality.Coupled with a large number of modern airport use frequency conversion speed control equipment,UPS power supply,power electronic equipment,etc,harmonic pollution problems are increasingly prominent,harmonic management is imperative.Shuangliu Airport is the fourth largest aviation hub in the country.It has a huge daily passenger flow and plays an important role in the layout of China’s civil airports.However,there have been problems with switching failure,caused by suspected excessive levels of harmonics,and for the existence of potential harmonic harm at Shuangliu Airport,it is urgent to conduct comprehensive harmonic testing and analysis of its power supply system.Domestic researches on airport harmonics are limited,mostly concentrated in Guangzhou Baiyun Airport.Harmonic analysis for Shuangliu Airport is basically absent.Based on the importance of Shuangliu Airport and its existing harmonic hazards,this paper has formulated a Its targeted test plan,in order to more clearly analyze the operation of the Shuangliu airport power supply system,this paper starts from reality and uses the power quality test system independently developed by Southwest Jiaotong University.Completed the harmonic test of the 110 kV civil aviation substation of the Shuangliu Airport and the lower load of 10 kV and 0.4kV.Through the statistical analysis of the test data,the key data such as voltage and current distortion rate and effective value were calculated to measure the harmonic pollution of each load in the airport.From the analysis results,it is shown that the 5th and 7th harmonics of the No.5 transformer in Terminal T1 exceed the standard,and harmonic oscillations and high harmonics are relatively high in some of the lighting stations,and there is no harmonic pollution in other loads in the Shuangliu Airport.At the end of this paper,according to the existing harmonic control plan,the author puts forward specific suggestions for the harmonic pollution problems existing in Shuangliu Airport.