AHF&SVG in Data Center Industry

The Active Harmonic Filter adopts advanced power electronics technology to detect the harmonics in the grid in real time, generate the reverse phase compensation current through the converter, and dynamically filter out the harmonics in the grid.Static Var Generator can be real-time dynamic compensation, can compensate for the perceptual reactive power and the tolerance of the reactive power, and will not occur overfill, underfill, can stabilize the system voltage.

The PQ Problem

Both the switching power supply and the input of the UPS generate a harmonic current, and the final harmonic current is pooled on the total generating row.A large amount of harmonic current will cause the following harm to the communication room: harmonic current will interfere with the communication signals of adjacent wires.The harmonic current in the power grid increases the total current, which can easily lead to the misaction of the protection devices and lead to delayed work accidents.Harmonics will reduce the stability and life of equipment, cables, transformers and other equipment.Harmonic current occupies the transformer capacity, increases the load rate of the transformer, and may cause the transformer noise.If the necessary harmonic control measures are not taken, it will bring serious harmonic pollution to the input power grid.When serious, it will endanger the safe operation of the input grid and various electrical equipment across the grid in this grid.

The Solution of YTPQC-APF and YTPQC-SVG

There is a serious current harmonic problem in a data center, and the harmonic current distortion rate reaches 32.8%, mainly for 3,5 and 7 harmonics.Through field testing and simulation analysis, our technical team gives a configuration scheme of 1200A  Active Power Filter and 600Kvar Static Var Generator for harmonic filtering and reactive power compensation.

The Technical Performance

After the YTPQC-APF Active Power Filter device management, the field harmonic current decline range is very obvious, the current distortion rate on the site will decrease from 32.8% to about 1.5%, through the YTPQC-SVG Static Var Generator, and the power factor in the site is increased from 0.94 to 1.0.

The current waveform before compensation	The current waveform after compensation
Current distortion rate before compensation	Current distortion rate after compensation
Reactive power and power factor before compensation	Reactive power and power factor after compensation

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