Power Quality Problems in Data Center
Due to the uninterrupted power supply of the load in the data center room, a large number of UPS, switching power supplies and inverter air conditioners are used. The input stages of these devices are all three-phase arrangements, which generate a lot of harmonics when used. The switching power supply and UPS equipment first rectify the AC into DC, and then convert it into the corresponding DC and AC through secondary conversion. During the period, the switching tube is used to control the opening and closing of the primary current of the transformer, which not only generates harmonics during rectification, but also reflects high-frequency harmonics to the power supply when the switching tube is turned on and off, causing the neutral current of the distribution transformer to remain high. Harmonics also pollute the grid through distribution transformers.
Hazards and Influence
The input terminals of the switching power supply and the UPS all generate harmonic currents, which eventually converge on the total busbar. A large amount of harmonic current will cause the following harm to the communication room:
If the necessary harmonic control measures are not taken, it will bring serious harmonic pollution to the input grid. In severe cases, it may also endanger the safe operation of the input power grid and various electrical equipment connected across the power grid.
YT Power Quality Solutions
The main loads of the data center are UPS and switching power supplies, which are traditional harmonic source loads, which will seriously affect the stability of the power system. At the same time, due to the existence of a large number of UPSs in data centers, most of the reactive loads in data centers are capacitive. According to the current situation of harmonics and reactive power in the data center, the best solution is to use Active Harmonic Filter devices to compensate for harmonics, and Static Var Generators to compensate for reactive power. The AHF 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. The SVG can dynamically compensate in real time, and can compensate inductive reactive power and capacitive reactive power without over-compensation and under-compensation, and can stabilize the system voltage.
Projects( Some examples) |
Products |
Model |
Johnson Road Traffic Card Data Center Project |
YTPQC-SVG |
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YTPQC-AHF |
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China Electronics Technology Group Corporation The 50th Research Institute |
Active Harmonic Filter |
YTPQC-AHF |
Huaye International Data Center Project |
Active Harmonic Filter |
YTPQC-AHF |
China Unicom Cloud Computing Service Data Center Power Distribution Project |
Active Harmonic Filter |
YTPQC-AHF |
One Project
A data center has serious current harmonic problems. The harmonic current distortion rate reaches 32.8%, mainly the 3rd, 5th, and 7th harmonics. After the YTPQC-AHF Active Harmonic Filter device treatment, the reduction of the harmonic current on site is very obvious, the current distortion rate on site will be reduced from 32.8% to about 1.5%, and the power factor on site will be increased from 0.94 to 1.0, the compensation effect See below.
More Applications
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