WO2013040975A1 - Multi-level dc conversion power source device - Google Patents

Multi-level dc conversion power source device Download PDF

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Publication number
WO2013040975A1
WO2013040975A1 PCT/CN2012/080484 CN2012080484W WO2013040975A1 WO 2013040975 A1 WO2013040975 A1 WO 2013040975A1 CN 2012080484 W CN2012080484 W CN 2012080484W WO 2013040975 A1 WO2013040975 A1 WO 2013040975A1
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Prior art keywords
voltage
unit
output
switching unit
circuit switching
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PCT/CN2012/080484
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French (fr)
Chinese (zh)
Inventor
马西田
王严军
林春清
金永辉
王田利
许立功
石洪晶
Original Assignee
辽宁省电力有限公司大连供电公司
国家电网公司
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Publication of WO2013040975A1 publication Critical patent/WO2013040975A1/en

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Classifications

    • 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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • 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
    • H02J1/108—Parallel operation of dc sources using diodes blocking reverse current flow

Definitions

  • the invention relates to an AC/DC integrated power supply device, in particular to a multi-stage DC conversion power supply device.
  • the power supply for the existing intelligent substation is generally AC/DC integrated power supply.
  • the energy storage devices of the AC/DC integrated power supply are all maintenance-free lead-acid batteries.
  • the disadvantages are as follows: 1. To ensure the reliability of use, it is often necessary. Voltage and internal resistance monitoring of the battery; 2. The battery has only 1000 cycles of charging and discharging life, which is difficult to meet the requirements of power switches such as intelligent switches and intelligent terminals in today's intelligent substation; 3. Under-voltage protection needs to be set when the battery pack is discharged Otherwise, the battery will be damaged due to over-discharge. Therefore, some of the battery cannot be released and cannot be used effectively. After a long time of use, the battery will have a memory effect, the capacity will decrease, and the life will be shortened. 4.
  • the lead plates of the battery are prone to loss and thinning during charging and discharging, and the conversion efficiency of electric energy and chemical energy is reduced. 5.
  • the battery needs to be maintained frequently and subjected to deep discharge to ensure the battery life. 6.
  • the volatilization of acidic liquids affects the environment, and the discarded batteries can also cause great harm to the environment.
  • the object of the present invention is to overcome the deficiencies of the prior art and provide a multi-stage DC conversion power supply device with a wide input voltage range, stable output, reliable operation, simple principle, light weight, high efficiency and maintenance-free.
  • a multi-stage DC conversion power supply unit is characterized in that it is composed of a super capacitor, a circuit switching unit, a multi-level voltage conversion unit and a voltage monitoring unit.
  • the total output of the super capacitor is connected to the multi-level voltage conversion unit through the circuit switching unit, and the multi-level voltage conversion unit is connected to the load, and the voltage
  • the monitoring unit is connected to the output end of the supercapacitor and the circuit switching unit for detecting the output voltage of the supercapacitor and the operation of the switching circuit of the control circuit.
  • the circuit switching unit is composed of parallel DC contactors, wherein one DC contactor is directly connected to the load, and the other contactors are respectively connected to the DC/DC module in the multi-stage voltage conversion unit.
  • the multi-level voltage conversion unit is composed of parallel DC/DC modules, each DC/DC module is serially connected between the DC contactor of the circuit switching unit and the load, and the positive output of the DC/DC module is isolated.
  • the pole tube is in direct contact with the output bus.
  • the voltage monitoring unit is composed of an auxiliary power source and a CPU controller, and the auxiliary power source supplies power to the main power of the CPU controller and the detection chip power supply, and the CPU controller controls the DC contactors in the switching unit according to the detected voltage segmentation control circuit. action.
  • the invention adopts a multi-stage DC converter, which can realize voltage stability and no-interval output, and improves stability and reliability.
  • the input voltage can be arbitrarily input within the range of 50-270V, avoiding a wide input voltage range and improving the design difficulty of the power supply, and reducing the stability of the power supply.
  • the supercapacitor has a cycle charge/discharge life of more than 500,000 times, the ultra-capacitor with a very low capacity can be configured by a multi-stage DC power supply device to meet the power supply backup delay and intelligent switch of the intelligent substation, especially the mobile intelligent substation station. Power, background monitoring and other power requirements.
  • the structure is simple and the service life is long.
  • Figure 1 is a schematic diagram of the circuit of the present invention.
  • the supercapacitor 1 can be set in groups, and this embodiment gives a group of a total of 100 series. Its total output is connected to the input terminals of the four DC contactors in the circuit switching unit 2, respectively.
  • the output terminal of the DC contactor KM1 in the circuit switching unit is directly connected to the load, and the output terminal of the DC contactor KM2 is connected to the input terminal of the module DC/DC1 in the multi-stage voltage conversion unit 3; the output terminal of the DC contactor KM3 is The input terminals of the modules DC/DC2 in the multi-level voltage conversion unit are connected; the output terminals of the DC contactor KM4 are connected to the input terminals of the modules DC/DC3 in the multi-stage voltage conversion unit.
  • the multi-level voltage conversion unit converts the voltage of 50-270V to the working voltage of 220V to supply the DC load.
  • the positive output of the DC/DC module is connected to the output bus by the isolation diodes D1, D2 and D3 to prevent the module from malfunctioning.
  • the output voltage bus is backflushed into the machine.
  • the voltage monitoring unit 4 includes two parts of an auxiliary power supply and a CPU controller.
  • the auxiliary power supply converts the voltage across the supercapacitor bank to 5V/ ⁇ 12V, which is supplied to the CPU's main power supply and detection chip power supply.
  • the input voltage range is 45-300V, and the output is 5V/ ⁇ 12V.
  • the voltage monitoring unit CPU controller adopts 8-bit CPU, the sampling speed is 2 microseconds/time, and the CPU's voltage reference parameter is 2.500V.
  • the CPU internal program uses cyclic comparison to divide the DC voltage on the detected supercapacitor into four segments.
  • the voltage mode through the high current drive circuit, adjusts each DC/DC DC input contactor according to the voltage of the supercapacitor.
  • the relay output of the voltage monitoring unit is connected to the DC contactor coil in the circuit switching unit to control the on/off of the DC contactor, and the voltage monitoring unit is also connected to the output of the DC/DC module to detect the actual value of the output voltage. Is it normal and up
  • the bit machine transmits information.
  • the working process of the present invention is: when the output voltage of the supercapacitor is less than 46V, the voltage monitoring unit controls the DC contactors KM1, KM2, KM3, and KM4 in the circuit switching unit to be completely disconnected according to the detected voltage value, and the super capacitor is not loaded to the load. Output voltage and current; When the supercapacitor output voltage is greater than 46V and less than 75V, the voltage monitoring unit controls KM4 to be turned on, KM1, KM2, KM3 are turned off, the supercapacitor outputs voltage and current to the load, and KM3 is ready to be turned on.
  • the ON condition of KM3 is that the output voltage of the super capacitor is greater than 76V and less than 125V.
  • the DC/DC3 and DC/DC2 outputs in the multi-level voltage conversion unit are connected in parallel, and no output is inverted.
  • DC/DC3 and DC/DC2 have outputs when the supercapacitor output voltage is greater than 76V and less than 85V to compensate for the threshold voltage.
  • the zero output during conversion ensures the use of the load; when the output voltage of the supercapacitor is greater than 76V and less than 125V, the voltage monitoring unit controls KM3 to be turned on and KM4 is ready to be disconnected.
  • KM3 works normally, DC/DC3 has no output, DC/DC2 has normal output, KM1, KM2, KM4 are disconnected; when supercapacitor output voltage is greater than 116V and less than 185V, voltage monitoring unit Control KM2 is turned on, KM3 is turned off when the supercapacitor output voltage is greater than 126V; when the supercapacitor output voltage is greater than 186V, the voltage monitoring unit controls KM2 to open and KM1 to be turned on. At this time, the supercapacitor directly outputs the voltage and current to the load. use.
  • the contactor switching of the circuit switching unit ensures that the power output of the supercapacitor voltage at the critical point is stable and mutually backed up to ensure continuous power supply of the DC/DC converter power supply.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Dc-Dc Converters (AREA)

Abstract

A multi-level DC conversion power source device consists of a super capacitor (1), a circuit switching unit (2), a multi-level voltage conversion unit (3), and a voltage monitoring unit (4). The output end of the super capacitor (1) is connected to the multi-level voltage conversion unit (3) through the circuit switching unit (2), the multi-level voltage conversion unit (3) is connected to a load, the voltage monitoring unit (4) is connected to the output end of the super capacitor (1) and the circuit switching unit (2) for detecting the output voltage of the super capacitor (1) and controlling the circuit switching unit (2) to in its actions. The input voltage thereof can be arbitrarily inputted within the range of 50 - 270 V, and can realize stable and constant voltage output, improving stability and reliability. The power source requirements such as backup delay of power sources used by intelligent transformers, especially mobile intelligent transformers, intelligent switch actions, background monitoring and so on can be met. The structure thereof is simple, and the service life thereof is long.

Description

说 明 书  Description
多级直流变换电源装置 Multi-stage DC conversion power supply unit
技术领域 Technical field
本发明涉及一种交直流一体化电源装置，特别是一种多级直流变换电源装 置。  The invention relates to an AC/DC integrated power supply device, in particular to a multi-stage DC conversion power supply device.
背景技术 Background technique
现有智能变电站的站用电源一般采用交直流一体化电源，交直流一体化电 源的储能装置都是采用免维护铅酸蓄电池， 其不足之处在于： 一、为保证使用 的可靠性需要经常对蓄电池进行电压、 内阻监测； 二、 蓄电池只有 1000次左 右的循环充、放电寿命， 难以满足当今智能变电站中智能开关、智能终端等电 源的需求； 三、蓄电池组放电时需要设置欠压保护， 否则蓄电池会因为过放而 损坏， 因此蓄电池有部分电能不能释放， 不能有效利用， 而且长时间使用后， 蓄电池会有记忆效应， 容量会下降， 寿命会缩短。 四、 蓄电池的铅制极板在充 电放电过程中容易损耗变薄， 电能和化学能的转装换效率降低。五、蓄电池需 要经常维护， 进行深度放电， 以保证蓄电池的寿命。六、 酸性液体挥发影响环 境， 废弃的蓄电池对环境也能带来很大危害。  The power supply for the existing intelligent substation is generally AC/DC integrated power supply. The energy storage devices of the AC/DC integrated power supply are all maintenance-free lead-acid batteries. The disadvantages are as follows: 1. To ensure the reliability of use, it is often necessary. Voltage and internal resistance monitoring of the battery; 2. The battery has only 1000 cycles of charging and discharging life, which is difficult to meet the requirements of power switches such as intelligent switches and intelligent terminals in today's intelligent substation; 3. Under-voltage protection needs to be set when the battery pack is discharged Otherwise, the battery will be damaged due to over-discharge. Therefore, some of the battery cannot be released and cannot be used effectively. After a long time of use, the battery will have a memory effect, the capacity will decrease, and the life will be shortened. 4. The lead plates of the battery are prone to loss and thinning during charging and discharging, and the conversion efficiency of electric energy and chemical energy is reduced. 5. The battery needs to be maintained frequently and subjected to deep discharge to ensure the battery life. 6. The volatilization of acidic liquids affects the environment, and the discarded batteries can also cause great harm to the environment.
发明内容 Summary of the invention
本发明的目的在于克服现有技术的不足， 提供一种输入电压范围宽， 输出 稳定， 工作可靠， 原理简单， 重量轻， 效率高， 免维护的多级直流变换电源装 置。  The object of the present invention is to overcome the deficiencies of the prior art and provide a multi-stage DC conversion power supply device with a wide input voltage range, stable output, reliable operation, simple principle, light weight, high efficiency and maintenance-free.
本发明的目的是这样实现的： 一种多级直流变换电源装置。其特征在于它 由超级电容器、 电路切换单元、 多级电压变换单元、 电压监控单元组成， 超级 电容器的总输出通过电路切换单元与多级电压变换单元连接，多级电压变换单 元与负载连接， 电压监控单元与超级电容器的输出端及电路切换单元连接， 用 以检测超级电容器的输出电压和控制电路切换单元动作。  The object of the present invention is achieved as follows: A multi-stage DC conversion power supply unit. The utility model is characterized in that it is composed of a super capacitor, a circuit switching unit, a multi-level voltage conversion unit and a voltage monitoring unit. The total output of the super capacitor is connected to the multi-level voltage conversion unit through the circuit switching unit, and the multi-level voltage conversion unit is connected to the load, and the voltage The monitoring unit is connected to the output end of the supercapacitor and the circuit switching unit for detecting the output voltage of the supercapacitor and the operation of the switching circuit of the control circuit.
所述的电路切换单元由并联的直流接触器构成，其中一个直流接触器直接 与负载连接， 其他接触器分别与多级电压变换单元中的 DC/DC模块连接。  The circuit switching unit is composed of parallel DC contactors, wherein one DC contactor is directly connected to the load, and the other contactors are respectively connected to the DC/DC module in the multi-stage voltage conversion unit.
所述的多级电压变换单元由并联的 DC/DC模块构成，每个 DC/DC模块均串 接在电路切换单元的直流接触器与负载之间，且 DC/DC模块的正输出用隔离二 极管与输出母线正相接。 The multi-level voltage conversion unit is composed of parallel DC/DC modules, each DC/DC module is serially connected between the DC contactor of the circuit switching unit and the load, and the positive output of the DC/DC module is isolated. The pole tube is in direct contact with the output bus.
所述的电压监控单元由辅助电源和 CPU控制器构成， 辅助电源给 CPU控 制器的主电源和检测芯片电源供电， CPU控制器根据检测到得电压分段控制电 路切换单元中各直流接触器的动作。  The voltage monitoring unit is composed of an auxiliary power source and a CPU controller, and the auxiliary power source supplies power to the main power of the CPU controller and the detection chip power supply, and the CPU controller controls the DC contactors in the switching unit according to the detected voltage segmentation control circuit. action.
本发明采用多级直流变换装置， 可以实现电压的稳定和无间隔输出， 提高 了稳定性和可靠性。输入电压可以在 50-270V范围内任意输入， 避免输入电压 范围宽而提高电源的设计难度， 降低电源的稳定性。 由于超级电容器具有 50 万次以上的循环充放电寿命，通过多级直流变换电源装置可以配置极低的容量 的超级电容器就可以满足智能变电站、特别是移动智能变电站站用电源后备延 时、 智能开关动作、 后台监控等电源需求。 其结构简单， 使用寿命长。  The invention adopts a multi-stage DC converter, which can realize voltage stability and no-interval output, and improves stability and reliability. The input voltage can be arbitrarily input within the range of 50-270V, avoiding a wide input voltage range and improving the design difficulty of the power supply, and reducing the stability of the power supply. Since the supercapacitor has a cycle charge/discharge life of more than 500,000 times, the ultra-capacitor with a very low capacity can be configured by a multi-stage DC power supply device to meet the power supply backup delay and intelligent switch of the intelligent substation, especially the mobile intelligent substation station. Power, background monitoring and other power requirements. The structure is simple and the service life is long.
附图说明 DRAWINGS
图 1为本发明的电路原理图。  Figure 1 is a schematic diagram of the circuit of the present invention.
具体实施方式 detailed description
下面结合附图对本发明作进一步说明：  The present invention will be further described below in conjunction with the accompanying drawings:
如图所示，超级电容器 1可以设若干组，本实施例给出的是一组，共计 100 个串联。其总输出分别与电路切换单元 2中的四个直流接触器的输入端子连接。 电路切换单元中的直流接触器 KM1 的输出端子直接与负载连接， 直流接触器 KM2的输出端子与多级电压变换单元 3中的模块 DC/DC1的输入端连接;直流接 触器 KM3的输出端子与多级电压变换单元中的模块 DC/DC2的输入端连接； 直 流接触器 KM4的输出端子与多级电压变换单元中的模块 DC/DC3的输入端连接。 多级电压变换单元将 50-270V的电压变换到 220V工作电压给直流负荷供电， 其中的 DC/DC模块的正输出用隔离二极管 Dl、 D2、 D3与输出母线正相接， 预 防模块出故障时输出电压母线反灌到机器内部。电压监控单元 4包含辅助电源 和 CPU控制器两部分电路。 辅助电源是将超级电容组两端电压转换为 5V/士 12V,提供给 CPU的主电源和检测芯片电源，输入电压范围 45-300V,输出 5V/ ± 12V。电压监控单元 CPU控制器采用 8位 CPU,采样速度为 2微秒 /次， CPU 的电压基准参数为 2.500V, CPU 内部程序采用循环比较， 将检测的超级电容 器上的直流电压分为四段调压方式， 通过大电流的驱动电路， 根据超级电容器 的电压调节每个 DC/DC的直流输入接触器。电压监控单元的继电器输出端与电 路切换单元中的直流接触器线圈连接， 用以控制直流接触器的通断， 电压监控 单元还与 DC/DC模块的输出端连接， 以检测输出电压的实际值是否正常并向上 位机传输信息。 As shown in the figure, the supercapacitor 1 can be set in groups, and this embodiment gives a group of a total of 100 series. Its total output is connected to the input terminals of the four DC contactors in the circuit switching unit 2, respectively. The output terminal of the DC contactor KM1 in the circuit switching unit is directly connected to the load, and the output terminal of the DC contactor KM2 is connected to the input terminal of the module DC/DC1 in the multi-stage voltage conversion unit 3; the output terminal of the DC contactor KM3 is The input terminals of the modules DC/DC2 in the multi-level voltage conversion unit are connected; the output terminals of the DC contactor KM4 are connected to the input terminals of the modules DC/DC3 in the multi-stage voltage conversion unit. The multi-level voltage conversion unit converts the voltage of 50-270V to the working voltage of 220V to supply the DC load. The positive output of the DC/DC module is connected to the output bus by the isolation diodes D1, D2 and D3 to prevent the module from malfunctioning. The output voltage bus is backflushed into the machine. The voltage monitoring unit 4 includes two parts of an auxiliary power supply and a CPU controller. The auxiliary power supply converts the voltage across the supercapacitor bank to 5V/±12V, which is supplied to the CPU's main power supply and detection chip power supply. The input voltage range is 45-300V, and the output is 5V/±12V. The voltage monitoring unit CPU controller adopts 8-bit CPU, the sampling speed is 2 microseconds/time, and the CPU's voltage reference parameter is 2.500V. The CPU internal program uses cyclic comparison to divide the DC voltage on the detected supercapacitor into four segments. The voltage mode, through the high current drive circuit, adjusts each DC/DC DC input contactor according to the voltage of the supercapacitor. The relay output of the voltage monitoring unit is connected to the DC contactor coil in the circuit switching unit to control the on/off of the DC contactor, and the voltage monitoring unit is also connected to the output of the DC/DC module to detect the actual value of the output voltage. Is it normal and up The bit machine transmits information.
本发明的工作过程是， 当超级电容器输出电压小于 46V时， 电压监控单 元根据检测到的电压值控制电路切换单元中的直流接触器 KM1、 KM2、 KM3、 KM4 全部断开， 超级电容器不向负载输出电压电流； 当超级电容器输出电压大于 46V且小于 75V时， 电压监控单元控制 KM4接通， KM1、 KM2、 KM3断开， 超 级电容器向负载输出电压电流， 同时 KM3准备启动接通。 KM3的接通条件是超 级电容器输出电压大于 76V且小于 125V。 多级电压变换单元中的 DC/DC3和 DC/DC2输出并联， 不会产生输出倒灌， DC/DC3和 DC/DC2在超级电容器输出 电压大于 76V且小于 85V时均有输出， 以弥补在临界电压转换时的零输出， 确保负载的使用； 当超级电容器输出电压大于 76V且小于 125V时， 电压监 控单元控制 KM3接通， KM4准备断开。 超级电容器输出电压大于 86V且小于 115V 时， KM3正常工作， DC/DC3无输出， DC/DC2正常输出， KM1、 KM2、 KM4 断开； 当超级电容器输出电压大于 116V且小于 185V时， 电压监控单元控制 KM2接通， KM3 在超级电容器输出电压大于 126V时断开； 当超级电容器输出 电压大于 186V 时， 电压监控单元控制 KM2 断开， KM1接通， 此时， 由超级 电容器直接输出电压电流给负载使用。  The working process of the present invention is: when the output voltage of the supercapacitor is less than 46V, the voltage monitoring unit controls the DC contactors KM1, KM2, KM3, and KM4 in the circuit switching unit to be completely disconnected according to the detected voltage value, and the super capacitor is not loaded to the load. Output voltage and current; When the supercapacitor output voltage is greater than 46V and less than 75V, the voltage monitoring unit controls KM4 to be turned on, KM1, KM2, KM3 are turned off, the supercapacitor outputs voltage and current to the load, and KM3 is ready to be turned on. The ON condition of KM3 is that the output voltage of the super capacitor is greater than 76V and less than 125V. The DC/DC3 and DC/DC2 outputs in the multi-level voltage conversion unit are connected in parallel, and no output is inverted. DC/DC3 and DC/DC2 have outputs when the supercapacitor output voltage is greater than 76V and less than 85V to compensate for the threshold voltage. The zero output during conversion ensures the use of the load; when the output voltage of the supercapacitor is greater than 76V and less than 125V, the voltage monitoring unit controls KM3 to be turned on and KM4 is ready to be disconnected. When the supercapacitor output voltage is greater than 86V and less than 115V, KM3 works normally, DC/DC3 has no output, DC/DC2 has normal output, KM1, KM2, KM4 are disconnected; when supercapacitor output voltage is greater than 116V and less than 185V, voltage monitoring unit Control KM2 is turned on, KM3 is turned off when the supercapacitor output voltage is greater than 126V; when the supercapacitor output voltage is greater than 186V, the voltage monitoring unit controls KM2 to open and KM1 to be turned on. At this time, the supercapacitor directly outputs the voltage and current to the load. use.
在整个切换过程当中， 电路切换单元的接触器切换保证了超级电容器电 压在临界点的电源输出稳定， 互为备份， 保证 DC/DC变换电源的持续供电。  During the whole switching process, the contactor switching of the circuit switching unit ensures that the power output of the supercapacitor voltage at the critical point is stable and mutually backed up to ensure continuous power supply of the DC/DC converter power supply.

Claims

权 利 要 求 书 Claim
1、 一种多级直流变换电源装置， 其特征在于它由超级电容器、 电路切换 单元、 多级电压变换单元、 电压监控单元组成， 超级电容器的总输出通过电路 切换单元与多级电压变换单元连接， 多级电压变换单元与负载连接， 电压监控 单元与超级电容器的输出端及电路切换单元连接，用以检测超级电容器的输出 电压和控制电路切换单元动作。 A multi-level DC conversion power supply device, characterized in that it is composed of a super capacitor, a circuit switching unit, a multi-stage voltage conversion unit, and a voltage monitoring unit, and the total output of the super capacitor is connected to the multi-level voltage conversion unit through the circuit switching unit. The multi-level voltage conversion unit is connected to the load, and the voltage monitoring unit is connected to the output end of the supercapacitor and the circuit switching unit for detecting the output voltage of the super capacitor and the operation of the switching circuit of the control circuit.
2、 根据权利要求 1所述的多级直流变换电源装置， 其特征在于所述的电 路切换单元由并联的直流接触器构成， 其中一个直流接触器直接与负载连接， 其他接触器分别与多级电压变换单元中的 DC/DC模块连接。  2. The multi-stage DC power supply device according to claim 1, wherein the circuit switching unit is composed of parallel DC contactors, wherein one DC contactor is directly connected to the load, and the other contactors are respectively multi-staged. The DC/DC modules in the voltage conversion unit are connected.
3、 根据权利要求 1所述的多级直流变换电源装置， 其特征在于所述的多 级电压变换单元由并联的 DC/DC模块构成，每个 DC/DC模块均串接在电路切换 单元的直流接触器与负载之间，且 DC/DC模块的正输出用隔离二极管与输出母 线正相接。  3. The multi-stage DC-DC power supply apparatus according to claim 1, wherein said multi-level voltage conversion unit is constituted by parallel DC/DC modules, and each DC/DC module is serially connected to the circuit switching unit. Between the DC contactor and the load, and the positive output of the DC/DC module is connected to the output bus with an isolation diode.
4、 根据权利要求 1所述的多级直流变换电源装置， 其特征在于所述的电 压监控单元由辅助电源和 CPU控制器构成， 辅助电源给 CPU控制器的主电源 和检测芯片电源供电， CPU控制器根据检测到得电压分段控制电路切换单元中 各直流接触器的动作。  4. The multi-stage DC-DC power supply apparatus according to claim 1, wherein said voltage monitoring unit is composed of an auxiliary power source and a CPU controller, and the auxiliary power source supplies power to the CPU controller main power source and the detection chip power source, and the CPU. The controller controls the action of each DC contactor in the switching unit according to the detected voltage segmentation.
PCT/CN2012/080484 2011-09-24 2012-08-23 Multi-level dc conversion power source device WO2013040975A1 (en)

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