PROJECT CASE

PROJECT CASE

Guangda Electric Is A Professional Organization Dedicated To Solving Power Quality Problems Of Users

High pressure compensation device case

Zero sequence filter device case

Filter compensation cabinet engineering case

Device level filter case

Active filtering typical case

Intelligent filter compensation module case

Shanxi Changzhi Netcom

Time：

2019-01-05

Typical Case of Harmonic Management in Communication Equipment Room II: (Shanxi Changzhi Telecom) Project Background: In communication equipment rooms, UPS (Uninterruptible Power Supply) has become an indispensable device. The UPS can provide high-quality power with high voltage regulation accuracy, stable frequency, and low waveform distortion to the load. Additionally, it can ensure uninterrupted power supply during static bypass switching. However, since the UPS is a nonlinear load, it generates a large amount of current harmonics, which not only causes harmonic pollution to the power grid but also affects other sensitive equipment in the equipment room, causing significant interference or even harm to the communication system. Therefore, all communication equipment rooms must address the issue of harmonic management.

Typical Case 2 of Harmonic Treatment in Communication Machine Room: (Shanxi Changzhi Telecom)
Project Background:
In communication machine rooms, UPS has become an indispensable device. UPS can provide high-quality power with high voltage regulation accuracy, stable frequency, and low waveform distortion to the load. Moreover, it can ensure uninterrupted power supply during static bypass switching. However, since UPS is a nonlinear load, it generates a large amount of current harmonics, causing harmonic pollution to the power grid and affecting other sensitive devices in the machine room, leading to significant interference or even harm to the communication system. Therefore, all communication machine rooms must face the issue of harmonic treatment.
Treatment Plan:
Based on the on-site working conditions and measurement results, it was found that harmonics are mainly generated by UPS and some nonlinear DC power supplies. According to a mature and complete set of harmonic treatment solutions, we use the parallel active power filter independently developed and produced by our company to automatically track and treat the harmonic current generated by the load, ensuring the safe and reliable operation of the entire system.
Treatment Effect:
GoodPower
As can be seen from the figure, the compensation effect is very significant, with the power factor compensated to 0.99; the total harmonic content decreased from 23.4% before compensation to 6.2% after compensation, and the waveform of the current has improved significantly, very close to a sine wave.

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