CN113472020B - Novel AC/DC hybrid data center power supply control system and control method - Google Patents
Novel AC/DC hybrid data center power supply control system and control method Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J4/00—Circuit arrangements for mains or distribution networks not specified as ac or dc
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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Abstract
The invention relates to a novel AC/DC mixed data center power supply control system, which comprises: the system comprises a DC power supply, an AC power supply, a renewable energy power generation power supply, a direct current power supply bus, an alternating current power supply bus, a DC/DC converter module, an AC/DC converter module, a storage battery pack, a multi-type alternating current/direct current conversion module and a state monitoring system; and the data center is powered by adopting any one of an efficient mode, an equalization mode and a renewable energy source consumption mode. The invention supplies power to the distribution bus by two paths of DC and AC power sources simultaneously, which not only has direct current power supply and alternating current power supply, improves the distribution efficiency and ensures the reliability of the data center power supply, but also adds a renewable energy source power generation power source on the DC side, so that the control mode has the capability of renewable energy source absorption.
Description
Technical Field
The invention belongs to the technical field of power distribution system control, and particularly relates to a novel AC/DC hybrid data center power supply control system and a control method of the data center power supply control system.
Background
A UPS alternating current power distribution scheme is adopted in a traditional data center, electric energy flows from an alternating current power supply to a server main board, and a plurality of alternating current-direct current conversion links are experienced, so that the loss is large and the efficiency is low. Since 2015, the HVDC power distribution mode is gradually popularized, a post-stage inversion link of a UPS is omitted, the efficiency is improved, and the HVDC power distribution mode is more and more widely applied in the IT industry. However, the above mode still has a plurality of transformation links, and the loss is still larger. And the bypass branch cannot be configured for communication with the HVDC power supply, and the reliability is reduced. And after the IT equipment adopts direct current power supply, a multi-stage intermediate conversion link can be gradually omitted, the efficiency is improved, and the method has wide application prospect under the background of greatly propelling new construction and 5G construction nowadays.
The data center is a specific equipment network in global collaboration, and is used for transmitting, accelerating, displaying, calculating and storing data information on an internet network infrastructure, belongs to primary load and is required to be supplied with power uninterruptedly. The current power supply mode of the data center mostly adopts an alternating current power supply main power supply and a UPS emergency power supply as an emergency standby power supply, the mode has more intermediate conversion links and larger power loss in the power transmission process, and a new power supply control system is required to be provided to better match with a direct current power transmission system under the background that direct current power supply starts to be popularized.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a novel AC/DC hybrid data center power supply control system, realizes AC/DC hybrid power supply to a data center, increases renewable energy sources on a DC power supply side to generate power and supply, and has higher power supply reliability and efficiency.
In order to solve the technical problems, the invention provides the following technical scheme.
In a first aspect, the present invention provides a novel ac/dc hybrid data center power supply control system, including: the system comprises a DC power supply, an AC power supply, a renewable energy power generation power supply, a direct current power supply bus, an alternating current power supply bus, a DC/DC converter module, an AC/DC converter module, a storage battery pack, a multi-type alternating current/direct current conversion module and a state monitoring system;
the DC power supply and the renewable energy source power supply are connected in parallel to a DC power supply bus, the DC power supply bus outputs a plurality of branches, and each branch is connected to the bus after being converted by a DC/DC converter module;
the AC power supply is directly connected to an AC power supply bus, the AC power supply bus outputs a plurality of branches, and each branch is connected to the bus after being converted by an AC/DC converter module;
a distribution bus is led out from the bus to supply power to the data center; the bus is also connected with a storage battery;
the multi-type alternating current-direct current conversion module is used for collecting branch current values of each branch of the direct current and alternating current power supply buses, and a parallel current sharing control technology is adopted to output control signals to each DC/DC converter module and each AC/DC converter module so that voltages in each input branch are equal;
the state monitoring system is used for monitoring the running states of the bus, each output branch of the distribution bus and the output port of the storage battery pack.
Optionally, the DC power supply is a 750V DC power supply.
Optionally, the AC power source is a 380V AC power source.
Optionally, the renewable energy power generation power supply is 450-850V direct current power supply.
In a second aspect, the present invention further provides a control method of the power supply control system of the data center, where three working modes are used to supply power to the data center, and the three working modes include: a high efficiency mode, an equalization mode, a renewable energy source absorption mode;
the high-efficiency mode is as follows: the AC power supply and the DC power supply simultaneously supply power, wherein the DC power supply is used as a main power supply, and the AC power supply is used as an auxiliary power supply;
the equalization mode is as follows: the AC/DC power supplies supply power simultaneously, and the two paths of power supplies have no primary and secondary division, and the DC/AC power supply is balanced;
the renewable energy consumption mode: the alternating current and direct current power supplies simultaneously, wherein the direct current power supplies simultaneously supply power for the DC power supply and the renewable energy power generation power supply.
Optionally, the control process of the high-efficiency mode is as follows:
regulating outlet voltage U of DC power supply access bus DC Outlet voltage U greater than AC power access bus AC The direct current source is used as a main power supply;
the voltage in each input branch of the DC power supply is equal by adopting a parallel current sharing control technology through a multi-type AC/DC conversion module.
Optionally, the control process of the equalization mode is:
the input voltage in each input branch of the DC power supply is equal in size and the input voltage in each input branch of the AC power supply is equal in size by adopting a parallel current sharing control technology through the multi-type AC/DC conversion module.
Optionally, the equalizing voltage in each input branch of the DC power supply by using a parallel current equalizing control technology includes:
collecting output voltage U of each DC/DC converter module DCn And calculate the average value
Calculation U DCn Average value ofThe difference is input into PI regulator to output PWM signal to DC/DC converter to be regulated to regulate its branchOutputting a voltage to approach to +.>
Optionally, the equalizing voltage in each input branch of the AC power source by adopting a parallel current equalizing control technology includes:
collecting output voltage U of each AC/DC converter module ACn And calculate the average value
Calculation U ACn Average value ofThe difference is input into the PI regulator, and PWM signal is output to the AC/DC converter to be regulated to regulate the branch output voltage to approach +.>
Optionally, the control process of the renewable energy consumption mode is as follows:
monitoring the output current I of an AC/DC converter AC When I is monitored AC <At the critical value, a limit value is set for the power output by the photovoltaic power supply, so that the photovoltaic power supply can stably output.
Compared with the prior art, the invention has the following beneficial effects: the invention is suitable for the AC/DC hybrid power supply and distribution system of primary loads such as a data center, a central control room and the like, or the DC or AC/DC hybrid power supply and distribution system of other important core areas or devices needing uninterrupted power supply, and has the following advantages:
1) The high-efficiency mode of the data center power supply control system adopts a DC main power supply and AC standby power supply mode, omits a multi-stage AC/DC conversion link and a multi-stage DC/DC conversion link which are arranged in a traditional AC main power supply and UPS power supply configuration link, and can obviously improve the power distribution efficiency;
2) The equalization mode of the data center power supply control system provided by the invention adopts a DC and AC dual-power supply mode, so that the power supply reliability of direct-current power distribution can be effectively improved;
3) The renewable energy source consumption mode of the data center power supply control system provided by the invention introduces renewable energy sources to generate electricity at the direct-current power supply side, so that the efficient full consumption of new energy sources is realized, and the operation economy of a power distribution system is improved;
4) The data center power supply control system provided by the invention adopts double power supplies to supply power, so that the flexible switching of DC and AC power supplies can be realized, and under the condition that one power supply loses power, the other power supply can independently supply power to the data center, thereby effectively improving the power supply reliability of the system.
Drawings
FIG. 1 is a schematic diagram of a topology structure of a novel AC/DC hybrid data center power supply control system in an embodiment of the invention;
FIG. 2 is a conventional power control topology; a) A UPS power supply scheme; b) HVDC power supply scheme; wherein PFC refers to power factor correction;
FIG. 3 is a schematic diagram of a system topology of a novel AC/DC hybrid data center power supply control system in an efficient mode and an equalization mode in an embodiment of the present invention;
fig. 4 is a schematic diagram of a system topology in a renewable energy source consumption mode of a novel ac/dc hybrid data center power supply control system according to an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
The power supply system of the data center in the prior art comprises a UPS power supply scheme and an HVDC power supply scheme, as shown in a) and b) in fig. 2, an alternating current power supply in the UPS power supply scheme is converted into direct current through an AC/DC converter module and a DC/DC converter module, then the direct current is supplied to the data center through the DC/DC converter module after passing through uncontrolled rectification and a PFC module, and the HVDC power supply scheme is formed by converting an alternating current power supply into direct current through the AC/DC converter module, and then supplying power to the data center through the DC/DC converter module after passing through uncontrolled rectification and the PFC module. In the prior art, the data center adopts an alternating current power supply as a power supply, the intermediate conversion links of the two power supply modes are more, and the power loss in the power transmission process is larger.
Therefore, the invention provides a novel AC/DC hybrid data center power supply control system which is applied to a primary load AC/DC hybrid power supply and distribution system requiring uninterrupted power supply, and the novel AC/DC hybrid data center power supply control system provided by the invention is described in detail below with reference to figures 1-4.
Fig. 1 is a schematic diagram of a topology structure of a novel ac/dc hybrid data center power supply control system according to an embodiment of the present invention, where the topology structure includes: a DC power supply (750V), an AC power supply (380V), a renewable energy power generation power supply (DC 450-850V), a DC power supply bus, an AC power supply bus, a DC/DC converter module, an AC/DC converter module, a storage battery pack, a multi-type AC/DC conversion module and a state monitoring system;
the DC power supply (750V) and the renewable energy power generation power supply (DC 450-850V) are used as direct-current power distribution power supplies of the data center, are connected in parallel to a direct-current power supply bus, and the AC power supply (380V) is led from an AC power grid to serve as an AC power supply and a standby power supply of the system and is connected to the AC power supply bus;
the DC power supply bus outputs a plurality of branches, each branch is connected to the bus after being transformed by the DC/DC converter module to supply power to the bus, the AC power supply bus outputs a plurality of branches, each branch is connected to the bus after being transformed by the AC/DC converter module to supply power to the bus,
the output side of each branch of the DC/AC power supply bus is provided with a current sensor, the collected current information is transmitted to a plurality of types of AC/DC conversion modules, and the current value of each input branch on the bus side is monitored. The multi-type AC/DC conversion modules adopt a parallel current sharing control technology and output control signals to each DC/DC converter module and each AC/DC converter module so that the voltages in each input branch are approximately equal.
A distribution bus is led out from the bus to supply power to the data center; the storage battery is connected with a bus and used as a standby power supply of the system and plays a role in energy storage;
the state monitoring system collects operation information, such as voltage value information, of the buses, each output branch of the distribution buses and the output ports of the storage battery pack. The power supply main control system consists of a state monitoring system and a multi-type alternating current-direct current conversion module, and is mainly used for monitoring whether power supply is normal or not and outputting a control signal to enable the voltage of a distribution bus of the data center to be stable, so that the power supply reliability and the power supply quality are ensured.
According to the circuit structure, the power supply system supplies power to the distribution bus by two paths of DC 750V power supply and AC 380V power supply simultaneously, so that direct current power supply and alternating current power supply exist, intermediate cascade links such as intermediate uncontrolled rectification and AC/DC power supply conversion are reduced, the distribution efficiency is improved, a traditional alternating current source can be introduced under the condition that the current direct current power transmission system is not applied in large-scale construction, and the reliability of power supply of a data center is ensured. And a renewable energy power generation power supply is added at the DC 750V side, and the distributed renewable energy power generation power supply such as roof photovoltaic power generation can be connected in situ, so that the control mode has the renewable energy consumption capability. The power supply control system is matched with a multi-type AC/DC conversion module parallel current sharing control system, and stable control voltage is realized by monitoring the output value of the AC/DC conversion module; and the output power is stabilized by monitoring the output value of the DC/DC conversion module.
The control method of the novel AC/DC hybrid data center power supply control system adopts three working modes for supplying power to the data center, wherein the three working modes comprise: a high efficiency mode, an equalization mode, a renewable energy source absorption mode;
the high-efficiency mode is to use DC 750V as a main power supply and AC 380V as an auxiliary power supply, and simultaneously supply power for alternating current and direct current. In order to ensure that the power consumed by the load is mainly supplied by a direct current source, i.e. the power flow direction of the system is from the direct current source to the data center, as shown in figure 3, the DC 750V direct current source outlet voltage U is set DC >AC 380V AC source outlet voltage U AC Because the direct current source is adopted as the main power supply, the electric energy loss in the electric energy conversion process is obviously reduced, and the operation efficiency of the power distribution system is effectively improved. In addition, the parallel current sharing control technology is adopted by the multi-type AC/DC conversion moduleThe voltage in each input branch of the DC power supply is approximately equal, and the output voltage U of each DC/DC module is collected DCn And calculate the average valueJudgment U DCn Mean value->The difference is input into a PI regulator, PWM signals are output to the AC/DC and DC/DC converters to be regulated to regulate the branch output voltage of the converters to correct unbalanced U DCn Values to make it approach +.>
The equalizing mode is to supply power by two paths of AC/DC power sources simultaneously, and the two paths of power sources have no primary and secondary power sources, and the DC/AC power sources are in equalizing power supply. The input voltage in each input branch is approximately equal by adopting a parallel current-sharing control technology through a multi-type alternating-current/direct-current conversion module, and the output voltage U of each DC/DC and AC/DC module is collected DCn And U ACn And calculate the average valueThe voltage on each input branch is made approximately equal by PI regulation.
The adoption of the parallel current sharing control technology makes the voltage in each input branch of the AC power supply equal in size, and the parallel current sharing control technology comprises the following steps:
collecting output voltage U of each AC/DC converter module ACn And calculate the average value
Calculation U ACn Average value ofThe difference is input into a PI regulator to output PWM signals to the AC/DC converter to be regulated to regulate the branch outputVoltage to make it approach +.>
On the basis that the renewable energy source absorption mode is a high-efficiency mode, as shown in fig. 4, a renewable energy source power generation power source, such as a roof photovoltaic power source, is added on the side of a DC 750V power supply source, and the photovoltaic power source is in a DC 450-850V state. In order to suppress the periodicity and randomness of the photovoltaic power generation, a limit value needs to be set to the power output by the photovoltaic power supply so that it can be stably output. Therefore, the output power of the photovoltaic power supply needs to be monitored in real time, and the output current I of the AC/DC converter is monitored AC Is achieved when I is monitored AC <When the critical value is reached, the output power of the alternating current source is reduced, the output power of the photovoltaic power generation is overlarge, the power limiting operation is required, and the relevant parameters of the DC/DC converter are changed to adjust.
The power supply system provided by the invention omits a multi-stage intermediate conversion link based on a traditional HVDC power distribution mode, improves the efficiency, and has a wide application prospect under the background of greatly promoting new construction and 5G construction.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (9)
1. Novel alternating current-direct current hybrid data center power supply control system, characterized by comprising: the system comprises a DC power supply, an AC power supply, a renewable energy power generation power supply, a direct current power supply bus, an alternating current power supply bus, a DC/DC converter module, an AC/DC converter module, a storage battery pack, a multi-type alternating current/direct current conversion module and a state monitoring system;
the DC power supply and the renewable energy source power supply are connected in parallel to a DC power supply bus, the DC power supply bus outputs a plurality of branches, and each branch is connected to the bus after being converted by a DC/DC converter module;
the AC power supply is directly connected to an AC power supply bus, the AC power supply bus outputs a plurality of branches, and each branch is connected to the bus after being converted by an AC/DC converter module;
a distribution bus is led out from the bus to supply power to the data center; the bus is also connected with a storage battery;
the multi-type alternating current-direct current conversion module is used for collecting branch current values of each branch of the direct current and alternating current power supply buses, and a parallel current sharing control technology is adopted to output control signals to each DC/DC converter module and each AC/DC converter module so that voltages in each input branch are equal;
the state monitoring system is used for monitoring the running states of the bus, each output branch of the distribution bus and the output port of the storage battery pack;
the control method of the novel AC/DC hybrid data center power supply control system adopts any one of a high-efficiency mode, an equalization mode and a renewable energy source consumption mode to supply power for a data center, wherein:
the high-efficiency mode is as follows: the AC power supply and the DC power supply simultaneously supply power, wherein the DC power supply is used as a main power supply, and the AC power supply is used as an auxiliary power supply;
the equalization mode is as follows: the AC/DC power supplies supply power simultaneously, and the two paths of power supplies have no primary and secondary division, and the DC/AC power supply is balanced;
the renewable energy consumption mode: the AC power supply and the DC power supply simultaneously supply power, wherein the DC power supply and the renewable energy power generation power supply are used as main power supply sources, and the AC power supply is used as an auxiliary power supply.
2. The novel ac/DC hybrid data center power control system of claim 1 wherein said DC power source is a 750V DC power source.
3. The novel AC/dc hybrid data center power control system of claim 1 wherein said AC power source is a 380V AC power source.
4. The novel alternating current-direct current hybrid data center power supply control system according to claim 1, wherein the renewable energy power generation power supply is a 450-850V direct current power supply.
5. The novel ac/dc hybrid data center power supply control system according to claim 1, wherein the control process of the high-efficiency mode is as follows:
regulating outlet voltage U of DC power supply access bus DC Outlet voltage U greater than AC power access bus AC The direct current source is used as a main power supply;
the voltage in each input branch of the DC power supply is equal by adopting a parallel current sharing control technology through a multi-type AC/DC conversion module.
6. The novel ac/dc hybrid data center power supply control system according to claim 1, wherein the control process of the equalization mode is:
the input voltage in each input branch of the DC power supply is equal in size and the input voltage in each input branch of the AC power supply is equal in size by adopting a parallel current sharing control technology through the multi-type AC/DC conversion module.
7. The novel ac/DC hybrid data center power supply control system according to claim 6, wherein the parallel current sharing control technique is adopted to equalize the voltage in each input branch of the DC power supply, and the system comprises:
collecting output voltage U of each DC/DC converter module DCn And calculate the average valueCalculation U DCn Mean value->The difference is input into PI regulator, PWM signal is output to DC/DC converter to be regulated to regulate its branch output voltage to make it approach +.>
8. The novel AC/dc hybrid data center power supply control system according to claim 6, wherein said equalizing the voltage in each input branch of the AC power supply by using the parallel current equalizing control technique, comprises:
collecting output voltage U of each AC/DC converter module ACn And calculate the average valueCalculation U ACn Mean value->The difference is input into the PI regulator, and PWM signal is output to the AC/DC converter to be regulated to regulate the branch output voltage to approach +.>
9. The novel ac/dc hybrid data center power supply control system according to claim 1, wherein the control process of the renewable energy source consumption mode is as follows:
monitoring the output current I of an AC/DC converter AC When I is monitored AC <At the critical value, a limit value is set for the power output by the photovoltaic power supply, so that the photovoltaic power supply can stably output.
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| US11967826B2 (en) | 2017-12-05 | 2024-04-23 | Sean Walsh | Optimization and management of power supply from an energy storage device charged by a renewable energy source in a high computational workload environment |
| US11962157B2 (en) | 2018-08-29 | 2024-04-16 | Sean Walsh | Solar power distribution and management for high computational workloads |
| US11929622B2 (en) | 2018-08-29 | 2024-03-12 | Sean Walsh | Optimization and management of renewable energy source based power supply for execution of high computational workloads |
| CN116960922B (en) * | 2023-09-21 | 2023-12-19 | 北京迪赛奇正科技有限公司 | Passive current-sharing power supply circuit, detection system and detection method |
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