WO2015096750A1 - 一种网络化的分布式高压直流供电系统 - Google Patents

一种网络化的分布式高压直流供电系统 Download PDF

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Publication number
WO2015096750A1
WO2015096750A1 PCT/CN2014/094870 CN2014094870W WO2015096750A1 WO 2015096750 A1 WO2015096750 A1 WO 2015096750A1 CN 2014094870 W CN2014094870 W CN 2014094870W WO 2015096750 A1 WO2015096750 A1 WO 2015096750A1
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power supply
power
voltage
grid
load
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PCT/CN2014/094870
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English (en)
French (fr)
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曾旭东
李治
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联方云天科技(北京)有限公司
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Publication of WO2015096750A1 publication Critical patent/WO2015096750A1/zh

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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
    • 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
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10—Parallel operation of dc sources

Definitions

  • the invention belongs to the technical field of power supply and power management of a computer room, and particularly relates to a networked distributed high voltage direct current power supply system.
  • UPS UPS
  • the floor load requirements of the room are very high, which reduces the effective use area of the data center and increases the cost; 3.
  • the data center room is limited in expansion, centralized UPS
  • the power supply capacity of the deployed system cannot be expanded at will, which limits the further expansion in the future.
  • the construction of the data center should be carried out in stages with the development of the business, and all the UPS will be used at one time. The system is deployed in place, bringing large and unnecessary expenses to the initial stage of construction.
  • the technical problem to be solved by the present invention is to provide a networked distributed high voltage DC power supply system in view of the deficiencies of the prior art.
  • a networked distributed high-voltage DC power supply system includes a plurality of AC power sources and a plurality of loads, and further includes a plurality of high-voltage DC power supply devices, a DC power grid, and a management control unit; and the plurality of high-voltage DC power supply devices and the plurality of AC power supplies respectively
  • the plurality of high voltage direct current power supply devices are further connected to the direct current power grid and the management control unit; the high voltage direct current power supply device is configured to convert alternating current power into direct current power and then supply power to the load or the direct current power grid.
  • Each of the high-voltage DC power supply devices can work independently and supply power only to the connected load; each of the high-voltage DC power supply devices can supply power to the connected load through the DC power grid and other high-voltage DC The power supply device is connected to the grid, and outputs DC power to the DC power grid, or inputs DC power from the DC power grid; each of the high voltage DC power supply devices can be in an independent working and grid-connected working state according to the instruction of the management control unit. Transform.
  • the networked distributed high voltage direct current power supply system is equipped with the number of the high voltage direct current power supply devices being greater than the number of the loads.
  • the high voltage DC power supply device includes a rectifier, a battery, a battery management module, a monitoring module, a DC power grid interface, a load interface, and a management communication interface, the rectifier is connected to the AC power source, and the rectifier and the monitoring module are simultaneously set.
  • the monitoring module is connected to the DC grid interface, the load interface, and the management communication interface, and is further configured to be connected to the battery through the battery management module;
  • the battery management module is responsible for controlling battery charging and discharging, and the load interface is used for Connected to the load, the DC grid interface is used to connect to a DC grid, the management communication interface is used to connect a management control unit, the rectifier is used to convert AC power into DC power;
  • the monitoring module is configured to a rectifier, a battery management module, The battery status, load power consumption and DC grid power supply are monitored and managed, and can be automatically adjusted according to the preset power supply mode.
  • the networked distributed high-voltage DC power supply system can initially set the high-voltage DC power supply device connected with the load to be in an independent working state, and the other high-voltage DC power supply device not connected to the load is a grid-connected working state for outputting direct current to the DC power grid;
  • the high-voltage DC power supply device in an independent working state is faulty or close to the upper limit of its load power, it is converted into the grid-connected working state of the input DC power from the DC grid, and then changed to the independent working state when it returns to normal;
  • the networked distributed high-voltage DC power supply system can also initially set all the high-voltage DC power supply devices to be connected to the DC power grid for the grid-connected working state, and the management control unit changes according to the operating current of each high-voltage DC power supply device. , adjust the output voltage of each high-voltage DC power supply device to the DC grid at any time.
  • the beneficial effects of the present invention are that on the one hand, the power supply efficiency is improved, and the networked architecture is used to improve the reliability and configuration flexibility of the entire system, occupying less space, saving energy and reducing costs.
  • FIG. 1 is a schematic structural diagram of a networked distributed high voltage direct current power supply system according to the present invention.
  • FIG. 2 is a schematic structural view of a high voltage direct current power supply device according to the present invention.
  • the present invention provides a networked distributed high voltage DC power supply system, including an AC power source 1 and a load 201-203. Also included are high voltage DC power supplies 301-304, and a DC grid 4 and a management control unit 5.
  • the high voltage DC power supply device 301-304 is connected to the AC power source 1 and each connection terminal is 101. .
  • the high voltage DC power supply unit 301 is connected to and powered by the load 201; the high voltage DC power supply unit 302 is connected to and supplied with the load 202; the high voltage DC power supply unit 303 and the load
  • the 203 is connected and powered; the high voltage DC power supply units 301-304 are also arranged to be connected to the DC grid 4 and the management control unit 5.
  • the high voltage DC power supply device 304 There is no load connection. Initially, the high-voltage DC power supply device 301-303 is in an independent working state, and converts the alternating current into direct current and supplies power to the connected load 201-203; the high-voltage direct current power supply device 304 is the grid-connected working state of direct current output to the DC grid.
  • the high voltage DC power supply devices 301-304 may be according to the management control unit 5 Instructions, between independent work and grid-connected work, so that each high-voltage DC power supply unit 301-304 It is not only a power supply unit in the power supply network, but also a power supply unit that can share power with other high-voltage DC power supply devices through the DC power grid.
  • the high voltage DC power supply device 301-304 includes an AC power source 101, a rectifier 6, a battery 7, and a battery management module. And a monitoring module 9, a DC grid interface 10, a load interface 11 and a management communication interface 12, the rectifier 6 is connected to the AC power source 101, and the rectifier 6 is set at the same time.
  • the monitoring module 9 Connected to the monitoring module 9; the monitoring module 9 is connected to the DC grid interface 10, the load interface 11 and the management communication interface 12, and is also provided through the battery management module 8 Connected to the battery 7; the battery management module 8 is responsible for controlling the charge and discharge of the battery 7, and the load interface 11 is for connecting the loads 201-203, the DC grid interface 10
  • the rectifier 6 is used to convert alternating current into direct current; the monitoring module sets 9 pairs of rectifiers 6, battery management module 8, battery 7 state, load
  • the power consumption of 201-203 and the power supply of DC grid 4 are monitored and managed, and can be automatically adjusted according to the preset power supply mode.
  • the high voltage DC power supply unit 301 fails to work, it is converted to the secondary power grid 4
  • the DC power output from the high voltage DC power supply unit 304 to the DC grid 4 is input to the high voltage DC power supply unit 301 for supplying power to the load 201.
  • the high voltage DC power supply unit 304 is to the DC grid 4
  • the load power is close to the critical value of the power supply, and the management control unit 5 will automatically be in the high voltage DC power supply device 301-303.
  • the one with the lowest current load power is selected, and it is converted into a grid-connected working state for outputting direct current to the DC grid, and DC power is output to the DC grid to supplement the high-voltage DC power supply device 304.
  • the power supply is insufficient.
  • the same processing is performed when similar problems occur in other high-voltage DC power supply devices.
  • Management control unit according to each high voltage DC power supply unit 301-304 The operating current changes to adjust the output voltage of each high-voltage DC power supply device to the DC grid.

Abstract

一种网络化的分布式高压直流供电系统，包括若干交流电源（1）、若干负载（201、202、203）、若干高压直流供电装置（301、302、303、304）以及直流电网（4）和管理控制单元（5）；若干高压直流供电装置分别与若干交流电源和若干负载相连接；若干高压直流供电装置还设置与直流电网和管理控制单元相连接；高压直流供电装置用于将交流电转化为直流电后向负载或者直流电网供电；每一个高压直流供电装置可以独立工作，仅向其所连接负载供电，也可以在向其所连接负载供电的同时，还通过直流电网与其他高压直流供电装置并网工作，向直流电网输出直流电，或者是从直流电网输入直流电；每一个高压直流供电装置可以在独立工作和并网工作两种状态之间变换。

Description

一种网络化的分布式高压直流供电系统 技术领域
本发明属于机房供电及电源管理技术领域，尤其涉及的是一种网络化的分布式高压直流供电系统。
背景技术
现在多数设备机房仍然采用传统交流 UPS 集中供电系统，传统交流 UPS 系统采用交流->直流->交流的转换，为 IT 设备供电，需要 2 次转换过程。如果能减少转换次数，就可以降低电力损耗，提高供电效率。因此出现了仅使用交流->直流的转换，然后直接用转换后的高压直流为 IT 设备供电的方式，称为高压直流供电系统或者高压直流 UPS 系统。但是目前的供电系统除了效率低之外，还存在其它问题： 1 、非模块化集中部署，如果 UPS 发生故障，容易造成全面的供电事故和整个数据中心机房断电； 2 、需要独立的 UPS 室安装 UPS 供电系统。由于需要集中放置众多的铅酸电池， UPS 室的地板承重要求很高，这样就降低了数据中心的有效使用面积，增加了成本； 3 、数据中心机房扩展受到限制，集中式 UPS 供电系统，其部署的供电能力无法随意扩容，使得未来进一步扩展受到限制。通常数据中心的建设要随着业务的发展分期进行，一次性将全部 UPS 系统部署到位，为建设初期带来很大的和不必要的费用支出。
因此，现有技术存在缺陷，需要改进。
发明内容
本发明所要解决的技术问题是针对现有技术的不足，提供一种网络化的分布式高压直流供电系统。
本发明的技术方案如下：
一种网络化的分布式高压直流供电系统，包括若干交流电源及若干负载，还包括若干高压直流供电装置、直流电网及管理控制单元；所述若干高压直流供电装置分别与所述若干交流电源和所述若干负载相连接；所述若干高压直流供电装置还设置与所述直流电网以及所述管理控制单元相连接；所述高压直流供电装置用于将交流电转化为直流电后向负载或者直流电网供电；每一个所述高压直流供电装置，可以独立工作，仅向其所连接负载供电；每一个所述高压直流供电装置，在向其所连接负载供电的同时，还可以通过直流电网与其他高压直流供电装置并网工作，向直流电网输出直流电，或者是从直流电网输入直流电；每一个所述高压直流供电装置可以根据所述管理控制单元的指令，在独立工作和并网工作两种状态之间变换。
所述网络化的分布式高压直流供电系统配备所述高压直流供电装置数量大于所述负载的数量。
所述高压直流供电装置包括整流器、电池、电池管理模块、监控模块、直流电网接口、负载接口以及管理通信接口，所述整流器与所述交流电源相连接，同时设置所述整流器与所述监控模块相连接；所述监控模块设置与直流电网接口、负载接口以及管理通信接口相连接，并且还设置通过电池管理模块与电池相连接；所述电池管理模块负责控制电池充放电，所述负载接口用于连接负载，所述直流电网接口用于连接直流电网，所述管理通信接口用于连接管理控制单元，所述整流器用于将交流电转换成直流电；所述监控模块设置对整流器、电池管理模块、电池状态、负载用电情况和直流电网供电情况进行监控和管理，并可根据预先设定的供电模式自动调整。
所述网络化的分布式高压直流供电系统可以初始设定连接有负载的高压直流供电装置为独立工作状态，其他没有连接负载的高压直流供电装置为向直流电网输出直流电的并网工作状态；当个别独立工作状态的高压直流供电装置故障或接近其负载功率上限时，则将其变换为从直流电网输入直流电的并网工作状态，当恢复正常后再变换为独立工作状态；当所有向直流电网输出直流电的高压直流供电装置的负载功率之和接近供电功率之和的临界值时，选择一台处于独立工作状态并且当前负载功率最低的高压直流供电装置变换为向直流电网输出直流电的并网工作状态。
所述网络化的分布式高压直流供电系统还可以初始设定所有所述高压直流供电装置均为向直流电网输出直流电的并网工作状态，管理控制单元根据每台高压直流供电装置工作电流的变化，随时调整各个高压直流供电装置向直流电网的输出电压。
本发明的有益效果在于一方面提高了供电效率，同时利用网络化的架构提高了整个系统的可靠性和配置的灵活性，占用空间少，节约能耗的同时也降低了成本。
附图说明
图 1 为本发明的网络化的分布式高压直流供电系统结构示意图。
图 2 为本发明的高压直流供电装置结构示意图。
具体实施方式
以下结合附图和具体实施例，对本发明进行详细说明。
如图1- 图2 所示，本发明提供一种网络化的分布式高压直流供电系统，包括交流电源1及负载201-203 ，还包括高压直流供电装置301-304 ，以及直流电网4和管理控制单元5 。所述高压直流供电装置 301-304 与交流电源 1 连接，每个连接端为 101 。高压直流供电装置 301 与负载 201 相连接并为其供电；高压直流供电装置 302 与负载 202 相连接并为其供电；高压直流供电装置 303 与负载 203 相连接并为其供电；高压直流供电装置 301-304 还设置与所述直流电网 4 以及所述管理控制单元 5 相连接。所述高压直流供电装置 304 并无负载连接。初始设置所述高压直流供电装置 301-303 为独立工作状态，将交流电转化为直流电后向其所连接负载 201-203 供电；高压直流供电装置 304 为向直流电网输出直流电的并网工作状态。所述高压直流供电装置 301-304 可以根据所述管理控制单元 5 的指令，在独立工作和并网工作两种状态之间变换，从而每个高压直流供电装置 301-304 ，既是供电网络中的一个供电单元，同时又是可以通过直流电网与其他高压直流供电装置共享电量的供电单元。
所述高压直流供电装置 301-304 包括交流电源 101 、整流器 6 、电池 7 、电池管理模块 8 、监控模块 9 ，直流电网接口 10 、负载接口 11 以及管理通信接口 12 ，所述整流器 6 与所述交流电源 101 相连接，同时设置所述整流器 6 与所述监控模块 9 相连接；所述监控模块 9 设置与直流电网接口 10 、负载接口 11 以及管理通信接口 12 相连接，并且还设置通过电池管理模块 8 与电池 7 相连接；所述电池管理模块 8 负责控制电池 7 充放电，所述负载接口 11 用于连接负载 201-203 ，所述直流电网接口 10 用于连接直流电网 4 ，所述整流器 6 用于将交流电转换成直流电；所述监控模块设置 9 对整流器 6 、电池管理模块 8 、电池 7 的状态、负载 201-203 的用电情况和直流电网 4 的供电情况进行监控和管理，并可根据预先设定的供电模式自动调整。
工作时，若高压直流供电装置 301 出现故障无法工作时，则将其变换为从直流电网 4 输入直流电的并网工作状态，高压直流供电装置 304 向直流电网 4 输出的直流电将输入给高压直流供电装置 301 ，供负载 201 供电。当高压直流供电装置 301 恢复正常后再变换为独立工作状态，不再从直流电网 4 输入直流电。若高压直流供电装置 304 向直流电网 4 供电时，其负载功率接近供电功率的临界值，管理控制单元 5 会自动在高压直流供电装置 301-303 之中选择当前负载功率最低的一个，将其变换为向直流电网输出直流电的并网工作状态，并向直流电网输出直流电，以补充高压直流供电装置 304 的供电不足。以此类推，当其他高压直流供电装置出现类似问题是也进行相同处理。
管理控制单元根据每台高压直流供电装置 301-304 的工作电流变化，调整各个高压直流供电装置向直流电网的输出电压。
应当理解的是，对本领域普通技术人员来说，可以根据上述说明加以改进或变换，而所有这些改进和变换都应属于本发明所附权利要求的保护范围。

Claims (5)

  1. 一种网络化的分布式高压直流供电系统，包括若干交流电源及若干负载，其特征在于，还包括若干高压直流供电装置、直流电网及管理控制单元；所述若干高压直流供电装置分别与所述若干交流电源和所述若干负载相连接；所述若干高压直流供电装置还设置与所述直流电网以及所述管理控制单元相连接；所述高压直流供电装置用于将交流电转化为直流电后向负载或者直流电网供电；每一个所述高压直流供电装置，可以独立工作，仅向其所连接负载供电；每一个所述高压直流供电装置，在向其所连接负载供电的同时，还可以通过直流电网与其他高压直流供电装置并网工作，向直流电网输出直流电，或者是从直流电网输入直流电；每一个所述高压直流供电装置可以根据所述管理控制单元的指令，在独立工作和并网工作两种状态之间变换。
  2. 如权利要求 1 所述的网络化的分布式高压直流供电系统，其特征在于，配备所述高压直流供电装置的数量大于所述负载的数量。
  3. 如权利要求 2 所述的网络化的分布式高压直流供电系统，其特征在于，所述高压直流供电装置包括整流器、电池、电池管理模块、监控模块、直流电网接口、负载接口以及管理通信接口，所述整流器与所述交流电源相连接，同时设置所述整流器与所述监控模块相连接；所述监控模块设置与直流电网接口、负载接口以及管理通信接口相连接，并且还设置通过电池管理模块与电池相连接；所述电池管理模块负责控制电池充放电，所述负载接口用于连接负载，所述直流电网接口用于连接直流电网，所述管理通信接口用于连接管理控制单元，所述整流器用于将交流电转换成直流电；所述监控模块设置对整流器、电池管理模块、电池状态、负载用电情况和直流电网供电情况进行监控和管理，并可根据预先设定的供电模式自动调整。
  4. 如权利要求 3 所述的网络化的分布式高压直流供电系统，其特征在于，初始设定连接有负载的高压直流供电装置为独立工作状态，其他没有连接负载的高压直流供电装置为向直流电网输出直流电的并网工作状态；当个别独立工作状态的高压直流供电装置故障或接近其负载功率上限时，则将其变换为从直流电网输入直流电的并网工作状态，当恢复正常后再变换为独立工作状态；当所有向直流电网输出直流电的高压直流供电装置的负载功率之和接近供电功率之和的临界值时，选择一台处于独立工作状态并且当前负载功率最低的高压直流供电装置变换为向直流电网输出直流电的并网工作状态。
  5. 如权利要求 3 所述的网络化的分布式高压直流供电系统，其特征在于，初始设定所有所述高压直流供电装置均为向直流电网输出直流电的并网工作状态，管理控制单元根据每台高压直流供电装置工作电流的变化，随时调整各个高压直流供电装置向直流电网的输出电压。
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