CN113472020A - 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
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Abstract
The invention relates to a novel AC/DC hybrid 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 AC/DC conversion module and a state monitoring system; and any one working mode of a high-efficiency mode, a balance mode and a renewable energy consumption mode is adopted to supply power to the data center. According to the invention, the DC power supply and the AC power supply simultaneously supply power to the distribution bus, so that the direct current power supply and the alternating current power supply are provided, the distribution efficiency is improved, the reliability of the power supply of the data center is ensured, and the renewable energy power generation power supply is added on the DC side, so that the control mode has the renewable energy consumption capability.
Description
Technical Field
The invention belongs to the technical field of power distribution system control, and particularly relates to a novel alternating current-direct current 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 is transmitted from an alternating current power supply to a server mainboard, a plurality of alternating current-direct current conversion links are performed, loss is large, and efficiency is low. Since 2015, the HVDC power distribution mode starts to be gradually popularized, a subsequent inversion link of a UPS power supply is omitted, the efficiency is improved, and the HVDC power distribution mode is more and more widely applied to the IT industry. However, the above method still has a plurality of conversion links, and the loss is still large. And the communication HVDC power supply can not be provided with a bypass branch circuit, so that the reliability is reduced. After the IT equipment is powered by direct current, multistage intermediate conversion links can be gradually omitted, the efficiency is improved, and the method has wide application prospect under the background of great promotion of new capital construction and 5G construction nowadays.
The data center is a global cooperative specific equipment network, is used for transmitting, accelerating, displaying, calculating and storing data information on internet network infrastructure, belongs to a first-level load, and needs to supply power uninterruptedly. Nowadays, an alternating current power supply main supply and a UPS emergency power supply are mostly adopted as emergency standby power supplies for a data center power supply mode, the mode has more intermediate conversion links and larger power loss in the electric energy transmission process, and under the background that direct current power supply is popularized, a new power supply control system needs to be provided to better match a direct current power transmission system.
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 for a data center, increases renewable energy sources on a DC power supply side for power generation and power 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 AC/DC conversion module and a state monitoring system;
the DC power supply and the renewable energy 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 the 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 the 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 pack;
the multi-type alternating current-direct current conversion module is used for acquiring branch current values of each branch of the direct current and alternating current power supply buses, and outputting control signals to each DC/DC converter module and each AC/DC converter module by adopting a parallel current-sharing control technology so as to enable the voltage in each input branch to be equal;
the state monitoring system is used for monitoring the running states of the output branches of the bus and 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 supply is a 380V AC power supply.
Optionally, the renewable energy power generation power supply is a 450-850V direct current power supply.
In a second aspect, the present invention further provides a control method of the above data center power supply control system, wherein three working modes are adopted to supply power to a data center, and the three working modes include: a high-efficiency mode, an equilibrium mode and a renewable energy consumption mode;
the high-efficiency mode is as follows: the AC power supply and the DC power supply power simultaneously, 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 alternating current and direct current power supplies supply power simultaneously, the two paths of power supplies have no primary and secondary power supplies, and the direct current and the alternating current supply power in a balanced manner;
the renewable energy consumption mode is as follows: the alternating current power supply and the direct current power supply simultaneously, wherein the direct current power supply supplies power for the DC power supply and the renewable energy power generation power supply simultaneously.
Optionally, the control procedure of the high efficiency mode is:
regulating voltage U of outlet of DC power supply access busDCVoltage U greater than AC power supply access bus wire outletACSo that the direct current source is used as a main power supply source;
the voltage in each input branch of the DC power supply is equal by the multi-type alternating current-direct current conversion module and the parallel current sharing control technology.
Optionally, the control process of the equalization mode is:
the multi-type alternating current-direct current conversion module adopts a parallel current-sharing control technology to ensure that 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.
Optionally, the equalizing the voltages in each input branch of the DC power supply by using the parallel current sharing control technique includes:
collecting output voltage U of each DC/DC converter moduleDCnAnd calculating the average value
Calculate UDCnAnd the average value
Inputting the difference into PI regulator, outputting PWM signal to DC/DC converter to regulate its branch output voltage
Optionally, the equalizing the voltages in each input branch of the AC power supply by using the parallel current sharing control technique includes:
collecting output voltage U of each AC/DC converter moduleACnAnd calculating the average value
Calculate UACnAnd the average value
Inputting the difference into PI regulator, outputting PWM signal to AC/DC converter to regulate its branch output voltage
Optionally, the control process of the renewable energy consumption mode is as follows:
monitoring the output current I of an AC/DC converterACWhen I is monitoredAC<And when the threshold value is reached, a limit value is set for the power output by the photovoltaic power supply, so that the photovoltaic power supply can stably output the power.
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 which need uninterrupted power supply, and has the advantages that:
1) the high-efficiency mode of the data center power supply control system provided by the invention adopts a mode of DC main power supply and AC standby power supply, saves the multi-stage AC/DC and DC/DC conversion links arranged in the traditional links of AC main power supply and UPS power supply configuration, and can obviously improve the power distribution efficiency;
2) the balance 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) according to the renewable energy consumption mode of the data center power supply control system, renewable energy is introduced to the DC power supply side for power generation, so that efficient full consumption of new energy is realized, and the running economy of a power distribution system is improved;
4) the data center power supply control system provided by the invention adopts double power supplies for power supply, can realize flexible switching of DC and AC power supplies, and can independently supply power to the data center by one power supply under the condition that one power supply loses power, 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 present invention;
FIG. 2 is a conventional power supply control topology; a) a UPS power supply scheme; b) an HVDC power supply scheme; wherein PFC refers to power factor correction;
fig. 3 is a schematic diagram of system topology in an efficient mode and an equilibrium mode of the novel ac/dc hybrid data center power supply control system in the embodiment of the present invention;
fig. 4 is a schematic system topology diagram of a renewable energy consumption mode of the novel ac/dc hybrid data center power supply control system in the 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 illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the prior art, a power supply system of a data center includes a UPS power supply scheme and an HVDC power supply scheme, as shown in a) and b) of fig. 2, in the UPS power supply scheme, an AC power supply is converted into a direct current through an AC/DC converter module and a DC/DC converter module, and then the direct current is supplied to the data center through the DC/DC converter module after passing through an uncontrolled rectification and a PFC module, and in the HVDC power supply scheme, the AC power supply is converted into a direct current through the AC/DC converter module, and then the direct current is supplied to the data center through the DC/DC converter module after passing through the 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 electric energy 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 detailed description of the novel AC/DC hybrid data center power supply control system provided by the invention is provided below with reference to the attached drawings 1-4.
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 present invention, where the topology structure includes: the system comprises a DC power supply (750V), an AC power supply (380V), a renewable energy power supply (DC 450-850V), 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;
a DC power supply (750V) and a renewable energy power supply (DC 450-850V) are used as direct current distribution power supplies of the data center and are connected in parallel to a direct current power supply bus, and an AC power supply (380V) is introduced from an alternating current network and is used as an alternating current power supply and a standby power supply of a system and is connected to the alternating current power supply bus;
the direct current supply bus outputs a plurality of branches, each branch is switched in the bus after being converted by the DC/DC converter module to supply power to the bus, the alternating current supply bus outputs a plurality of branches, each branch is switched in the bus after being converted by the AC/DC converter module to supply power to the bus,
and a current sensor is configured on the output side of each branch of the direct current and alternating current power supply buses, acquired current information is transmitted to the multi-type alternating current-direct current conversion module, and the current value of each input branch of the bus side is monitored. The multi-type alternating current-direct current conversion module adopts a parallel current sharing control technology, and outputs control signals to each DC/DC converter module and each AC/DC converter module so that the voltage in each input branch is approximately equal.
Leading out a power distribution bus from the bus to supply power to the data center; the storage battery is connected with the 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 bus, each output branch of the distribution bus and the output port of the storage battery pack. The power supply main control system consists of a state monitoring system and a multi-type AC-DC conversion module, and is mainly used for monitoring whether power supply is normal or not and outputting a control signal to stabilize the voltage of a power distribution bus of the data center, so that the power supply reliability and the power supply quality are guaranteed.
According to the circuit structure, the power supply system simultaneously supplies power to the power distribution bus by the DC 750V power supply and the AC 380V power supply, so that the direct current power supply and the alternating current power supply are realized, intermediate cascade links such as intermediate uncontrolled rectification, AC/DC power supply conversion and the like are reduced, the power distribution efficiency is improved, and the traditional alternating current source can be introduced under the condition that the current direct current transmission system is not constructed and applied on a large scale, so that the reliability of power supply of a data center is ensured. And a renewable energy power generation source is added at the DC 750V side, and a distributed renewable energy power generation source such as roof photovoltaic power generation can be accessed on site, so that the control mode has the renewable energy consumption capability. The power supply control system is matched with a multi-type alternating current-direct current conversion module parallel current-sharing control system, and the voltage is stably controlled by monitoring the output value of the AC/DC conversion module; 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 to supply power to the data center, and the three working modes comprise: a high-efficiency mode, an equilibrium mode and a renewable energy consumption mode;
in the high-efficiency mode, DC 750V is used as a main power supply, AC 380V is used as an auxiliary power supply, and an alternating current power supply and a direct current power supply power simultaneously. The electric energy consumed by the load being supplied primarily by a DC source, i.e. the power flow of the systemThe direction is from the DC source to the data center, as shown in FIG. 3, the DC source outlet voltage U of DC 750V is setDC>AC 380V AC source outlet voltage UACAnd because the direct current source is used as the main power supply source, 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 voltage in each input branch of the DC power supply is approximately equal by the multi-type AC-DC conversion module and adopting the parallel current-sharing control technology, and the output voltage U of each DC/DC module is collectedDCnAnd calculating the average value
Judge UDCnAnd the average value
Inputting the difference value into PI regulator, outputting PWM signal to AC/DC and DC/DC converter to regulate its branch output voltage, and correcting unbalanced UDCnValue of, make it approach to
The balance mode is that the AC and DC power supplies supply power simultaneously, and the two power supplies have no primary and secondary power supply, and the DC and AC power supplies are balanced. The input voltage in each input branch is approximately equal by adopting the parallel current-sharing control technology through the multi-type alternating current-direct current conversion modules, and the output voltage U of each DC/DC and AC/DC module is collectedDCnAnd UACnAnd calculating the average value
The voltage on each input branch is made approximately equal by PI regulation.
The adoption is parallelly connected current-sharing control technique makes the voltage size in every input branch road of AC power equal, includes:
collecting output voltage U of each AC/DC converter moduleACnAnd calculating the average value
Calculate UACnAnd the average value
Inputting the difference into PI regulator, outputting PWM signal to AC/DC converter to regulate its branch output voltage
On the basis that the renewable energy consumption mode is a high-efficiency mode, as shown in fig. 4, a renewable energy power generation power supply, such as a roof photovoltaic power supply, is added on the power supply side of DC 750V, and the photovoltaic power supply is DC 450-850V. In order to suppress the periodicity and randomness of photovoltaic power generation, a limit value needs to be set for the power output by the photovoltaic power supply so that the photovoltaic power supply can stably output the power. 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 monitoredACWhen I is monitoredAC<When the value is critical, 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 needed, and the relevant parameters of the DC/DC converter are changed for adjustment.
The power supply system provided by the invention is based on the traditional HVDC power distribution mode, omits a multi-stage intermediate conversion link, improves the efficiency, and has wide application prospect under the background of great promotion of new capital construction and 5G construction at present.
As will be appreciated by one skilled in the art, 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 flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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 above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a novel alternating current-direct current hybrid's data center power supply control system which characterized in that includes: 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 AC/DC conversion module and a state monitoring system;
the DC power supply and the renewable energy 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 the 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 the 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 pack;
the multi-type alternating current-direct current conversion module is used for acquiring branch current values of each branch of the direct current and alternating current power supply buses, and outputting control signals to each DC/DC converter module and each AC/DC converter module by adopting a parallel current-sharing control technology so as to enable the voltage in each input branch to be equal;
the state monitoring system is used for monitoring the running states of the output branches of the bus and the distribution bus and the output port of the storage battery pack.
2. The system of claim 1, wherein the DC power source is a 750V DC power source.
3. The system of claim 1, wherein the AC power source is a 380V AC power source.
4. The novel AC/DC hybrid data center power supply control system according to claim 1, wherein the renewable energy power supply is a 450-850V DC power supply.
5. The control method of the data center power supply control system according to any one of claims 1 to 4, characterized by adopting any one of an efficient mode, a balanced mode and a renewable energy consumption mode to supply power to the data center, wherein:
the high-efficiency mode is as follows: the AC power supply and the DC power supply power simultaneously, 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 alternating current and direct current power supplies supply power simultaneously, the two paths of power supplies have no primary and secondary power supplies, and the direct current and the alternating current supply power in a balanced manner;
the renewable energy consumption mode is as follows: the alternating current power supply and the direct current power supply simultaneously, wherein the direct current power supply supplies power for the DC power supply and the renewable energy power generation power supply simultaneously.
6. The control method according to claim 5, wherein the control procedure of the high-efficiency mode is:
regulating voltage U of outlet of DC power supply access busDCVoltage U greater than AC power supply access bus wire outletACSo that the direct current source is used as a main power supply source;
the voltage in each input branch of the DC power supply is equal by the multi-type alternating current-direct current conversion module and the parallel current sharing control technology.
7. The control method according to claim 5, wherein the control procedure of the equalization mode is:
the multi-type alternating current-direct current conversion module adopts a parallel current-sharing control technology to ensure that 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.
8. The control method according to claim 7, wherein the equalizing the voltage in each input branch of the DC power supply by using the parallel current-sharing control technique comprises:
collecting output voltage U of each DC/DC converter moduleDCnAnd calculating the average value
Calculate UDCnAnd the average value
Inputting the difference into PI regulator, outputting PWM signal to DC/DC converter to regulate its branch output voltage
9. The control method according to claim 7, wherein the equalizing the voltage in each input branch of the AC power source by using the parallel current-sharing control technique comprises:
collecting output voltage U of each AC/DC converter moduleACnAnd calculating the average value
Calculate UACnAnd the average value
Inputting the difference into PI regulator, outputting PWM signal to AC/DC converter to regulate its branch output voltage
10. The control method according to claim 5, wherein the control procedure of the renewable energy consumption mode is:
monitoring the output current I of an AC/DC converterACWhen I is monitoredAC<And when the threshold value is reached, a limit value is set for the power output by the photovoltaic power supply, so that the photovoltaic power supply can stably output the power.
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| 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 |
| US11962157B2 (en) | 2018-08-29 | 2024-04-16 | Sean Walsh | Solar power distribution and management for high computational workloads |
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