Data center of commonly used power supply solution(section two)

The traditional UPS power supply solution
1) power frequency UPS uninterruptible power supply solution
The traditional phased rectifier of UPS "1 + 1" dual bus power supply scheme, solve the bottleneck of single point of failure, has the very good fault tolerance, improve the reliability of power supply system. Often use UPS single power capacity in 200 ~ 400 k.

Advantage: because of machine components under power frequency voltage stress is small, high reliability of the device, and control is relatively simple, therefore, the reliability of the system is relatively high.

Weakness: the whole machine volume, weight, big, big power consumption, low efficiency and low input power factor of adverse factors greatly affect the reliability of the data center power and economic indicators. General normally frequency machine efficiency at about 92%, 12 pulse models of input power factor and harmonic current in 0.8 and 10%;To meet the requirements of high index of the power supply need to increase the corresponding filter, which can lead to the increase of cost, volume and weight.
2) high frequency UPS power supply solution
IGBT power rectifier of UPS "1 + 1" dual bus power supply scheme, solve the bottleneck of single point of failure, has the very good fault tolerance and improve the reliability of power supply system.
Advantages: high input power factor, can reach 0.99;
Harmonic current is small, less than 5%;
System with high efficiency, can reach 94% ~ 94%;
The machine is small in size, light weight, reduce the difficulty of the engineering construction and construction cost;
Compared with power frequency machine equipment volume can reduce 20 ~ 30%.
Disadvantages: more high frequency harmonic ground coupling, load caused by zero to a higher voltage, it is difficult to meet the IBM, HP servers, such as manufacturers to zero voltage is less than 1 v space requirements.
At present high voltage high frequency machine, enables the device withstand voltage stress is large, device reliability is relatively low.
3.2 modular UPS power supply solution
Adopts the modular UPS of "1 + 1" double bus power supply scheme, solve the bottleneck of single point of failure, stand-alone capacity in commonly 200 ~ 480 kva is more appropriate.
Modular UPS power supply advantage
1) reliability: modular UPS N + X architecture characteristics, from the perspective of system power supply, can eliminate the system scheme of public point of failure; Mature module UPS system architecture using redundancy design - a single module power part, control part fully redundant, system without public fault bottleneck.
2) availability: high availability highlighted modular UPS have perfect protection function and the safe use of ability, make sure the system itself and the users to protect facilities load time into many times, when a module is damaged, the automatic exit system, average share the load, other modules within the redundancy allows the atmosphere does not affect the load operation. Without waiting for repair downtime when replacement maintenance without professional and technical personnel, users online condition of fault module for replacement.
3 expandable sex: modular uninterruptible power supply with N + X architecture, features of each power module are built-in redundancy intelligent individuals, when any module (including system control module, static switch module) after failure occurs, the design will achieve the greatest degree of redundancy protection. It can also allow the user to choose according to their needs more than once the redundancy of fault tolerance rate of gain and loss will not affect the system scheme of local good sex, can realize "on-demand expansion, dynamic growth".
4) the cost of the investment: module UPS in the physical size of the weight than traditional models have absolute advantages, for the user to save a lot of room for investment, bearing reinforcement.
5) high efficiency, energy saving, good input indicators, high efficiency, reduce the operation cost of users.
The input power factor can reach 0.99;The input current harmonic is less than 5%;System efficiency 94 ~ 95%. For more information, please visit www.rendapower.com.