Power Quality Problem
By the end of 2020, China railway operating mileage reached 146,000 kilometers, and the high-speed railway operating mileage reached 37,900 kilometers, ranking first in the world. High-speed rail traction transformers generally use 12 or 24 pulse rectification, which will generate 11th and 13th harmonics; power distribution transformer loads mainly include inverters, UPS, elevators, lighting, etc., which will generate 3rd, 5th, 7th, and 11th harmonics. , 13th harmonic.
Hazards and Influence
Because the transportation power grid system contains a large number of nonlinear equipment, a large number of harmonics will be generated when the equipment is running. When the harmonic content of the power grid is high, it will cause certain harm to the transportation power and lighting system.
YT Power Quality Solutions
The transportation power distribution system is mainly composed of the 3rd, 5th, 7th, 11th, and 13th harmonics, which have great harm to the power system and need to be treated with Active Harmonic Filters. The Active Harmonic Filter device adopts advanced power electronic technology to detect the harmonics in the power grid in real time, and generates an inverse compensation current through the converter to dynamically filter out the harmonics in the power grid.
Project List Examples
Projects( Some examples) |
Products |
Model |
Distribution station of the high-speed rail from Shanghai to Zhangjiagang |
YTPQC-AHF |
|
Beijing Fengtai High-speed Railway Station Project |
Active Harmonic Filter |
YTPQC-AHF |
CRRC Guangdong Transportation Vehicle Project |
Active Harmonic Filter |
YTPQC-AHF |
Wind Tower of Wuhan Metro Transportation Line 7 |
Active Harmonic Filter |
YTPQC-AHF |
Kunming Changshui Airport Power Distribution Station |
YTPQC-SVG |
In a subway line in Shanghai, due to the large on-site harmonics, in order to ensure the normal operation of the capacitors in the on-site reactive power compensation cabinet, a 100A Active Harmonic Filter was installed on-site to control the harmonics. After treatment, the on-site harmonic problem has been well improved, and the current distortion rate has been reduced from about 16% to about 3%.
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