Impact of harmonics on electricity consumption at airports

        With the development of society, power electronics technology has also been continuously developing, and the power system of airports has also been deeply affected by harmonics. The harmonic sources of airports are extensive, mainly generated by loads such as lighting systems, MRT systems, and baggage systems. The harmonic control solution provided by Xixing Technology can effectively solve the power quality problems of airports and create a green, healthy, safe, and stable power consumption environment.

Where do harmonics come from in airports

        The harmonic sources of airports are extensive, mainly including lighting systems such as fluorescent lamps, LED lamps and other single-phase harmonic source loads; variable frequency speed regulation equipment such as air conditioners; the main harmonics generated are mainly 3rd harmonics.

        The locomotives of the MRT system rely on AC to DC conversion for traction during operation, and many harmonics will appear during this period; the main harmonics generated are mainly 5th and 7th harmonics.

        The baggage system is a large system inside the airport, consisting of tens of thousands of motors, which is a large number, and the superimposed harmonics are also relatively large. The main harmonics generated are mainly 5th and 7th harmonics.

        The harmonic current distortion rate of the power distribution system of airports generally reaches about 20~40%.

The pain points of harmonics in airports

         Many harmonic source loads of lighting systems in airports will generate many 3rd harmony. Since the vector angles of the 3rd harmonic currents are the same, the three-phase vector sum cannot be offset, and can only be superimposed on the neutral line, making the current on the neutral line more than twice that of the phase line, causing the neutral line to become seriously hot, and the outer protective rubber to age rapidly. In severe cases, there may even be fire hazards!

        At the same time, the harmonics generated by the harmonic source loads of the MRT system and the baggage system will cause electrical equipment to overheat, generate vibration and noise, and age the insulation, shorten the service life, and even cause failure or burnout.

Comprehensive harmonic control solutions for commercial buildings 

at civil aviation airports

        EasyPQ-APF series active power filters of Xixing Technology can control 2nd-50th harmonics, and the harmonic filtering rate of low-order harmonics (harmonics lower than 13th) can reach more than 95%. The harmonics generated by airports are mainly 3rd, 5th, and 7th.

        In view of the harmonic problems existing in this industry, the EasyPQ-APF series active power filters can be used to control harmonics and adjust the imbalance of three-phase currents, comprehensively improve the power quality of the system, and ensure the safety.