Direct Current Power Supply System in Data Centers

2010 ◽  
Vol 130 (5) ◽  
pp. 289-292 ◽  
Author(s):  
Toshimitsu TANAKA ◽  
Tadatoshi BABASAKI
Keyword(s):  
Direct Current ◽  
Power Supply ◽  
Power Supply System ◽  
Data Centers ◽  
Supply System

Float-Charging Characteristics of Lithium Iron Phosphate Battery Based on Direct-Current Power Supply System in Substation

2016 ◽  
Vol 142 (1) ◽  
pp. 04015016
Author(s):  
Zengfu Wei ◽  
Guobin Zhong ◽  
Wei Su ◽  
Wenhong Wang ◽  
Yanquan Zhang ◽  
...  
Keyword(s):  
Direct Current ◽  
Power Supply ◽  
Power Supply System ◽  
Lithium Iron Phosphate ◽  
Iron Phosphate ◽  
Supply System

Power System Research for Cabled Seafloor Scientific Observatory

2014 ◽  
Vol 1030-1032 ◽  
pp. 1415-1420
Author(s):  
Ying Bin Feng ◽  
Zhi Gang Li ◽  
Xiao Hui Wang
Keyword(s):  
Power System ◽  
Direct Current ◽  
Power Supply ◽  
Power Supply System ◽  
Transmission System ◽  
Supply System ◽  
Special Importance ◽  
System Research ◽  
Underwater Environment ◽  
Maximum Voltage

The power supply system, which is totally discussed in this paper, is of special importance for the daily operation of the cabled seafloor scientific observatory. Based on the unique features of the power supply system of the cabled seafloor scientific observatory, this paper proposes the solution of parallel direct current power supply, which is suitable for the underwater environment. According to special application environment of power supply system,this paper determines the maximum voltage and current that can be applied to the transmission system of the cabled seafloor scientific observatory.

scholarly journals Research on the Application of Renewable Energy in DC Data Center

2021 ◽  
Vol 2108 (1) ◽  
pp. 012054
Author(s):  
Xingyu Bai
Keyword(s):  
Information Technology ◽  
Renewable Energy ◽  
Energy Storage ◽  
Power Supply ◽  
Data Center ◽  
Power Supply System ◽  
Data Centers ◽  
Supply System ◽  
Dc Power ◽  
Dc Power Supply

Abstract With the rapid development of the information technology industry, the demand for data centers is gradually expanding. As the foundation of carrying many information technology services, data centers have been built and put into use on a large scale. At the same time, the characteristics of huge energy consumption are more obvious. Due to the defects of low utilization rate, heavy pollution and limited reserves of traditional fossil fuels when supplying energy for data centers, the development of green renewable energy has become an inevitable demand. This paper studies the key technologies involved in supplying power to DC power supply data center with renewable energy, and makes a case to compare the DC power supply system and the AC power supply system. This paper also pays attention to the technology of energy storage in data center, and makes an analysis to prove the advantages of energy storage data center. In addition, this paper studies and summarizes the application of multi-station integration technology and other issues.

RECALCULATION OF THE LOADS CURRENT OF ACTIVE MULTI-PORT NETWORKS ON THE BASIS OF PROJECTIVE GEOMETRY

2013 ◽  
Vol 22 (05) ◽  
pp. 1350031 ◽  
Author(s):  
A. A. PENIN
Keyword(s):  
Projective Geometry ◽  
Direct Current ◽  
Power Supply ◽  
Power Supply System ◽  
Traditional Approach ◽  
Cross Ratio ◽  
Supply System ◽  
The Cross ◽  
The Given

For an active multi-port network of a direct current, as a model of a power supply system, the problem of recalculation of the changeable loads currents is considered. The approach on the basis of projective geometry is used for interpretation of changes or "kinematics" of regime parameters of a circuit. The changes of the regime parameters are introduced otherwise, through the cross ratio of four points with use of projective coordinates. Easy-to-use formulas of the recalculation of the currents, which possess the group properties at change of conductivity of the loads, are obtained. It allows expressing the final values of the currents through the intermediate changes of the currents and conductivities. Disadvantages of the traditional approach, which uses the changes of resistance in the form of increments, are shown. The given approach is applicable to the analysis of "flowed" form processes of the various physical natures.

scholarly journals Simulation of m-phase active voltage rectifier with space-vector modulation

2019 ◽  
Vol 63 (4) ◽  
pp. 455-468 ◽  
Author(s):  
S. V. Panteleev ◽  
A. N. Malashin ◽  
A. E. Kaleda
Keyword(s):  
Direct Current ◽  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Specific Power ◽  
Space Vector Modulation ◽  
Space Vector ◽  
Svm Algorithm ◽  
M Phase ◽  
Vector Modulation

The autonomous power supply system (APSS) from synchronous magnetoelectric generator and active voltage rectifier (AVR) maximally meets the requirements of the minimum specific mass and the complete coordination of the primary electric power source with the load. With multiphase (m > 3) execution of the electric machine, it is possible to obtain a trapezoidal electromotive force (EMF) and increase the specific power conversion provided that the EMF and the current at the output of the m-phase generator are fully matched. Therefore, the aim of the work is to synthesize the space-vector modulation (SVM) algorithm of the active voltage rectifier to fully match the primary source of electrical energy with the load under the condition of a trapezoidal EMF of the generator. Synthesis of the PVM algorithm for the m-phase AVR is based on the use of a vector-matrix mathematical apparatus. Using the example of a nine-phase system, a SVM algorithm has been developed, the feature of which is the transformation of the generalized voltage vector m-phase coordinate system into (m – 1)/2 voltage vectors with different angular velocities in two-phase orthogonal stationary αβ coordinate systems. At the same time, based on the developed PVM algorithm, it is possible to independently control the (m – 1)/2 voltage vectors in the corresponding αβ planes, providing a signal similar to the EMF of the generator at the input terminals of the AVR. In order to confirm the theoretical propositions, an imitation model of the space-vector modulation unit for the realization of trapezoidal signals at the terminals of a nine-phase AVR has been developed. The efficiency of the developed algorithm is confirmed by the results of simulation modelling. As a result of the evaluation of the energy parameters (operating power) of the phase of power supply system direct current, it is established that the application of the developed space-vector modulation algorithm for the active voltage rectifier in order to fully match the trapezoidal shape of the EMF and the current at the output of the m-phase generator will increase the power of the APSS by 14 % compared to a power supply system of direct current with a sinusoidal form of the EMF and the current of the generator phase. It is established that the developed measuring device can be used to establish the presence of defects like “delamination”. The influence of the depth of the defect placement on the measured parameters is shown.

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