Summary
Data center is one of the most popular technology for recent years. The power substation of the data center provides reliable and stable power source to the devices in the engine room. To the whole data center system, the reliability of the power distribution is the main task of the power substation. Even a few minutes power cut may cause millions of USD lost.
Benefit from the technology of electronic power innovation, great changes happened of the power load of the modern IDC engine room, reliable, efficient and clear energy becomes the new trend of the power supply business trend. As the widely use of the HVDC, UPS, a higher utilize of energy efficiency is realized by using the frequency converter. But the side effect of the HVDC, UPS, converter and switching power supply is the capacitive reactive power harmonic. The power quality problems duce to the harmonic and reactive power becomes the crucial issue to strict the liability of the data center.
Reference standards
GB/T14549-93 《Power quality: public grid harmonics》
GB/T15543-1995 《Power quality: allowable unbalance of three-phase voltage》
GB/T15945-1995 《Power quality: allowable deviation of power system frequency》
GB/T12326-2000 《Power quality: voltage fluctuation and flicker》
GB/T12325-2003 《Power quality: allowable deviation of power supply voltage》
GB/T18481-2001 《Power quality: temporary overvoltage and transient overvoltage》
GB/T15576-1995 《General specification for low-voltage reactive power static compensation devices》
GB7625.11998 《Limits of harmonic current emitted by low-voltage electrical and electronic products》
GB4208-93 《Classification of Degrees of Protection Provided by Enclosures》
Application of data center
Solution of data center engine room
For the situation of the IDC engine room, the reactive power is serious, Sfere Electric provides the Static Var Generator (SVG). It has bidirectional compensation ability to maintain the system at 0.99 power factor. Meanwhile apply the Active Power Filter(APF) to solve the harmonic issue of the data center, release the damage of the harmonic damage to the power supply system, avoide the risk of resonance oscillation, improve the power environment of the data center engine room, enhance the power reliability.
This solution is specialized for the data center power substation. Because the load of the engine room is provide from the UPS, the amount of the capacitive reactive power is quiet big in the process of the UPS rectification, so the SVG was being used. It has bidirectional reactive power compensation ability, it keeps the unit power factor close to 1. Meanwhile apply the Active Power Filter(APF) to solve the harmonic issue of the data center, release the damage of the harmonic damage to the power supply system, avoid the risk of resonance oscillation, improve the power environment of the data center engine room, enhance the power reliability.
Data center infrastructure solution
For the data center infrastructure, the major nonlinear loading is the air conditioners and the office equipment. Use the dynamic dynamic harmonic elimination reactive power compensation lifting system power factor, use the active power filter module to solve the harmonic issue in the same time. Release the damage of the harmonic to the power system, avoid the risk of resonance oscillation, improve the power environment of the data center engine room, enhanced the power reliability.
