CN102570521A - Power system used for container type data center - Google Patents

Abstract

A power supply system for a container-type data center includes an uninterruptible power supply module, a power supply device and an energy storage capacitor. The uninterruptible power supply module converts external AC power into DC power to supply power to the power supply device. The power supply device includes a DC-DC converter, and the DC-DC converter converts the voltage signal at the input end of the power supply device into a voltage signal required for subsequent components to work. The energy storage capacitor is connected between the input terminal of the power supply device and the ground terminal. By moving the larger energy storage capacitor to the outside of the power supply device, the wind resistance inside the power supply device is reduced, and the heat dissipation efficiency is improved.

Description

The power-supply system that is used for counter formula data center

Technical field

The present invention relates to a kind of power-supply system, relate in particular to a kind of power-supply system that is used for counter formula data center.

Background technology

Counter formula data center (Container Data Center) is a kind of equipment that can carry out data processing and storage to a large amount of network communication datas.In the design process of counter formula data center, (Power Utilization Efficiency PUE) is the problem that people often pay close attention to the energy utilization efficiency of its power supply.

The power-supply system of counter formula data center generally includes a uninterrupted power supply module (Uninterruptible Power Supply; UPS), power distribution unit (Power Distribution Unit; PDU) and power supply device (Power Supply Unit, PSU).Generally include a DC-to-dc converter and a bigger storage capacitor in power supply device inside.In the process of voltage transitions, have the loss of energy, the loss of this energy is dispersed into external environment with the mode of heat energy.In the ordinary course of things, need on power supply device, install a fan additional to improve its heat dispersion.But because the capacity and the volume of storage capacitor are bigger, can certain influence be arranged to the windage of power supply device, influence the power supply device radiating efficiency.

Summary of the invention

In view of this, be necessary to provide a kind of power-supply system with better heat dispersion.

A kind of power-supply system that is used for counter formula data center comprises:

The uninterrupted power supply module, the uninterrupted power supply module comprises AC-DC converter and battery modules, AC-DC converter converts extraneous ac voltage signal into d. c. voltage signal;

Power supply device; Power supply device comprises DC-to-dc converter; The input of DC-to-dc converter is connected with the output of uninterrupted power supply module, and DC-to-dc converter converts the voltage signal of power supply device input into follow-up load elements work required voltage signal; And

Storage capacitor, storage capacitor are connected between the input and earth terminal of power supply device, and are arranged on the outside of power supply device.

Because the capacity and the volume of storage capacitor are bigger, it is shifted out power supply device inside help to improve the inner performance of ventilating of power supply device, improve the radiating efficiency of power supply device.Simultaneously, because the outside temperature of power supply device will be lower than the power supply device temperature inside, said storage capacitor can adopt the lower electric capacity of heat resisting temperature, thereby provides cost savings.

With reference to the accompanying drawings, in conjunction with specific embodiment the present invention is done further description.

Description of drawings

Fig. 1 is the functional block diagram of the power-supply system of the embodiment of the invention.

The main element symbol description

Power-supply system 10

Uninterrupted power supply module 110

AC-DC converter 111

Battery modules 112

Power distribution unit 120

Switching device 121

Power supply device 130

DC-to-dc converter 131

Filter capacitor 132

Storage capacitor 140

Load 150

Embodiment

See also Fig. 1, the power-supply system 10 that is used for counter formula data center of the embodiment of the invention comprises uninterrupted power supply module 110, power distribution unit 120, power supply device 130, storage capacitor 140 and load 150.

Uninterrupted power supply module 110 comprises AC-DC converter 111 and battery modules 112, the input of AC-DC converter 111 with extraneous ac voltage signal is linked to each other, be used for converting extraneous ac voltage signal into d. c. voltage signal.The size of said extraneous ac voltage signal be 400V between the 480V, it can come the generator of generator, combustion gas turbine or fuel driven to the power supply facilities.The output voltage of said AC-DC converter 111 is that 320V is between the 400V.Said battery modules 112 is connected with the output electricity of AC-DC converter 111.When extraneous power supply broke down, the subsequent conditioning circuit that said battery modules 112 can continue as uninterrupted power supply module 110 provided electric energy.As required, said battery modules 112 is a storage battery module, and when uninterrupted power supply module 110 operate as normal, said AC-DC converter 111 can be these storage battery module 112 chargings in the output dc voltage signal.

Power distribution unit 120 comprises switching device 121.The input of switching device 121 is connected with the output of AC-DC converter 111.Opening and closing state through control switch device 121 comes optionally to be 130 power supplies of follow-up power supply device.Switching device 121 can comprise many group switch elements, and each switch element is power supply device 130 of control separately.As required, thus uninterrupted power supply module 110 also can be directly be connected with power supply device 130 through power distribution unit 120 supplies power for power supply device 130.In the present embodiment, storage capacitor 140 is arranged on the inside of this power distribution unit 120.When power distribution unit 120 not being set, storage capacitor 140 can be arranged among the uninterrupted power supply module 110.

Power supply device 130 comprises DC-to-dc converter 131 and filter capacitor 132.The input of DC-to-dc converter 131 is connected with the output of switching device 121; This DC-to-dc converter 131 is used for converting the voltage signal of switching device 121 outputs to follow-up load 150 operate as normal required normal voltage signal, like the voltage signal of 5V or 12V.Load 150 can be unit such as inner memory of counter formula data center or processor.In the present embodiment, DC-to-dc converter 131 converts the voltage signal of the 400V of switching device 121 outputs to the voltage signal of the 12V of DC-to-dc converter 131 outputs.One end of said filter capacitor 132 is connected on the output of power distribution unit 120, and its other end is connected with earth terminal.The effect of this filter capacitor 132 is the deviate of input voltage is maintained within certain scope.For general power-supply system, its ripple voltage (RippleVoltage) is defined as about 1% of input voltage usually.Be under the situation of 400V promptly, generally need utilize filter capacitor 132 that input voltage is maintained in the voltage range of 400V ± 4V for the standard input voltage.

One end of storage capacitor 140 links to each other with the input of power supply device 130, and its other end is connected with earth terminal.The effect of said storage capacitor 140 is behind system cut-off, storage capacitor 140 still can be in a period of time (like 20ms) for subsequent conditioning circuit provides electric energy, thereby normally closing the buffer time that provides certain for subsequent conditioning circuit.Need to prove that the effect of storage capacitor 140 and battery modules 112 is also inconsistent.The effect of battery modules 112 is when meeting the situation of unexpected power failure; Battery modules 112 inner stored electric energy can continue to be supplied to power supply device 130; Make it keep operate as normal, its duration reaches dozens of minutes or more than the several hrs usually.And the effect of storage capacitor 140 mainly is under the situation that system normally closes, and makes subsequent conditioning circuit that certain closing buffer time (like 20ms) can be arranged, and preserves or carry out closing motion etc. to realize data in closing buffer time at this.

Particularly, said DC-to-dc converter 131 is the full-bridge direct current change-over circuit, and it generally includes the switch that direct voltage just converts high-frequency ac voltage into, and high-frequency ac voltage is carried out the transformer coil of step-down and follow-up regulator rectifier circuit.Recently control the ratio that voltage changes through the main coil of selection transformer coil and the number of turn of secondary coil.In the present embodiment, the turn ratio of said transformer coil is N _p: N _s=40: 2, N wherein _pRepresent the number of turn of main coil, N _sRepresent the number of turn of secondary coil.

In the above-mentioned power-supply system 10 that is used for counter formula data center, storage capacitor 140 is transferred to the inside of power distribution unit 120 from the inside of power supply device 130.Because the capacity and the volume of storage capacitor 140 are bigger, storage capacitor 140 is shifted out power supply device 130 after, can effectively improve the inner performance of ventilating of power supply device 130, thereby improve its radiating efficiency.Under the situation of utilizing fan that power supply device 130 is dispelled the heat, use lower rotation speed of the fan still can play better radiating effect.The technique effect of embodiment of the present invention will be described with the Practical Calculation value of storage capacitor 140 and filter capacitor 132 below.

For storage capacitor 140, its capacitance C _HoldUsually satisfy following formula:

Formula 1: $\frac{P_{\mathrm{Out}}}{\mathrm{Eff}}\×T_{\mathrm{Hold}}=\frac{1}{2}\×C_{\mathrm{Hold}}\×(V_{\mathrm{In}-\mathrm{Normal}}^2-V_{\mathrm{In}-\mathrm{Min}}^2)$

In formula 1, V _In-normalRepresent normal input voltage; V _In-minRepresent minimum operating voltage; P _OutRepresent power output; Eff represents conversion efficiency; T _HoldThe representative outage is held time.

Formula 1 is put in order, can be obtained the capacitance C of storage capacitor 140 _HoldComputing formula:

Formula 2: $C_{\mathrm{Hold}}=\frac{P_{\mathrm{Out}}}{\mathrm{Eff}}\×\frac{T_{\mathrm{Hold}}\×2}{(V_{\mathrm{In}-\mathrm{Normal}}^2-V_{\mathrm{In}-\mathrm{Min}}^2)}$

If set V _In-normal=400V; V _In-min=320V; P _Out=900W; Eff=0.97; T _Hold=20ms; Then learn C through calculating _Hold=644.3 μ F.Consider the normal capacity and the error amount thereof of electric capacity, selecting nominal capacity for use is 680 μ F, and operating voltage is that the electric capacity of 420V is as storage capacitor 140.With NCC (Nippon Chemi-Con) KMQ of company series aluminum electrochemical capacitor is example, and the electric capacity of its 680 μ F/420V (105 ℃) is of a size of: 35mm (Φ) * 50mm (L).It is thus clear that the volume of said storage capacitor 140 is about 4.8 * 10 ⁴Mm ³It is thus clear that, if said storage capacitor 140 is arranged at the inside of power supply device 130,, make power supply device 130 inside have bigger windage because its volume is bigger, be unfavorable for the heat dispersion of power supply device 130 inside.

For filter capacitor 132, its capacitance C _InUsually satisfy following formula:

Formula 3: $\mathrm{\Δ}{V}_{\mathrm{Cin}}=\frac{I_{\mathrm{In}}\×(D-D^2)\×T_s}{C_{\mathrm{In}}}=\frac{I_{\mathrm{Out}}^{\mathrm{In}}\×N_s}{2\×N_p}\×\frac{(D-D^2)\×T_s}{C_{\mathrm{In}}}$

In formula 3, Δ V _CinRepresent ripple voltage; I _InRepresent the input current of power supply device 130 inputs; T _sThe representation switch switching cycle; I _OutRepresent the output current of power supply device 130; N _pRepresent the number of turn of transformer main coil; N _sRepresent the number of turn of transformer secondary coil; D represents duty ratio;

Generally speaking, need be with ripple voltage Δ V _CinBe arranged to input voltage V _In1%.At V _In=400V, 1/T _s=140kHz, N _s=2, N _p=40, I _OutUnder the situation of=75A, D=0.375, can draw according to formula 3:

$C_{\mathrm{in}}=\frac{I_{\mathrm{out}}\×N_s}{2\×N_p}\×\frac{(D-D^2)\×T_s}{\mathrm{\Δ}{V}_{\mathrm{cin}}}=\frac{I_{\mathrm{out}}\×N_s}{2N_p}\×\frac{(D-D^2)\×T_s}{V_{\mathrm{in}}\×1\%}$

Through calculating C _In=0.78 μ F.Consider the nominal capacity and the error amount of electric capacity, selecting nominal capacity for use is 1 μ F, and operating voltage is that the electric capacity of 450V is as filter capacitor 132.With NCC (NipponChemi-Con) YXA of company series electric capacity is example, and the electric capacity of its 1 μ F/450V (105 ℃) is of a size of: 8mm (Φ) * 11.5mm (L).It is thus clear that the volume of said filter capacitor 132 is about 5.78 * 10 ²Mm ³This shows; The volume of the volume ratio storage capacitor 140 of filter capacitor 132 is wanted little two one magnitude; Storage capacitor 140 is transferred to the inside of power distribution unit 120 from the inside of power supply device 130, can effectively reduce the inner windage of power supply device 130, improve its radiating efficiency.And, because power distribution unit 120 temperature inside will be lower than power supply device 130 temperature inside, said storage capacitor 140 can adopt the lower electric capacity of heat resisting temperature (as heat-resisting be 85 ℃), thereby provide cost savings.

Be noted that above-mentioned execution mode is merely preferred embodiments of the present invention, those skilled in the art also can do other variation in spirit of the present invention.These all should be included within the present invention's scope required for protection according to the variation that the present invention's spirit is done.

Claims (8)

1. A power supply system for a containerized data center, comprising: An uninterruptible power supply module, the uninterruptible power supply module includes an AC-DC converter and a battery module, and the AC-DC converter converts an external AC voltage signal into a DC voltage signal; A power supply device, the power supply device includes a DC-DC converter, the input end of the DC-DC converter is connected to the output end of the uninterruptible power supply module, and the DC-DC converter connects the input end of the power supply device The voltage signal is converted to the voltage signal required for the operation of the subsequent load element; and An energy storage capacitor, the energy storage capacitor is connected between the input terminal of the power supply device and the ground terminal, and is arranged outside the power supply device. 2. The power supply system according to claim 1, wherein the uninterruptible power supply module further comprises a battery module, and the battery module is connected to the output terminal of the DC-DC converter for external Provides power to subsequent circuits during power failures. 3. The power supply system according to claim 2, wherein the battery module is a storage battery module, and the AC-DC converter charges the battery module while outputting a DC voltage signal during normal operation. 4. The power supply system according to claim 2 or 3, wherein the battery module comprises a plurality of battery cells electrically connected in parallel. 5. The power supply system according to claim 1, characterized in that, the power supply system further comprises a power distribution unit, the power distribution unit is connected between the uninterruptible power supply module and the power supply device, thereby selectively Supply power to the power supply unit. 6. The power supply system according to claim 5, wherein the energy storage capacitor is arranged inside the power distribution unit. 7. The power supply system according to claim 6, wherein the power distribution unit includes a switching device connected in series between the output terminal of the uninterruptible power supply module and the input terminal of the power supply device, and the energy storage capacitor Connected between the output of the switching device and ground. 8. The power supply system according to claim 1, wherein the power supply device further comprises a filter capacitor, and the filter capacitor is connected between the input terminal of the DC-DC converter and the ground terminal.

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