WO2011150733A1 - 电源老化系统及负载平衡控制方法 - Google Patents

电源老化系统及负载平衡控制方法 Download PDF

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Publication number
WO2011150733A1
WO2011150733A1 PCT/CN2011/073781 CN2011073781W WO2011150733A1 WO 2011150733 A1 WO2011150733 A1 WO 2011150733A1 CN 2011073781 W CN2011073781 W CN 2011073781W WO 2011150733 A1 WO2011150733 A1 WO 2011150733A1
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Prior art keywords
unit
regenerative
bus
current
power
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PCT/CN2011/073781
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English (en)
French (fr)
Inventor
黄汉基
Original Assignee
Wong Hon Ki
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Application filed by Wong Hon Ki filed Critical Wong Hon Ki
Priority to US13/701,832 priority Critical patent/US8890535B2/en
Publication of WO2011150733A1 publication Critical patent/WO2011150733A1/zh

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/40Testing power supplies
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28Testing of electronic circuits, e.g. by signal tracer
    • G01R31/2832Specific tests of electronic circuits not provided for elsewhere
    • G01R31/2836Fault-finding or characterising
    • G01R31/2849Environmental or reliability testing, e.g. burn-in or validation tests
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20The dispersed energy generation being of renewable origin
    • H02J2300/22The renewable source being solar energy
    • H02J2300/24The renewable source being solar energy of photovoltaic origin
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381Dispersed generators
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/20Climate change mitigation technologies for sector-wide applications using renewable energy

Definitions

  • the present invention relates to the field of power electronics, and in particular, to a power aging system and a load balancing control method. Background technique
  • FIG. 1 is a schematic diagram of a prior art power aging system.
  • a unit under test UUT, Unit Under Test
  • DC bus Direct Current Bus
  • the DC/AC Inverter Direct Current/Alternating Current Inverter
  • the DC/AC Inverter is used to convert the AC power back to the unit under test via the Renewable AC Bus.
  • the inventors have found that the defects of the prior art are: the existing power aging system is interfered by the commercial power grid, and an isolation transformer needs to be installed, so the approval of the power supply department is required, and the cost is increased;
  • the existing power aging system has a fixed loading power and cannot meet the needs of the tested unit.
  • the efficiency of the feedback is low, and the energy consumption is increased.
  • the present invention provides a power aging system, where the power aging system includes:
  • the system balance supply unit is configured to be connected to the mains and output a fixed voltage to the high voltage DC bus to generate direct current;
  • the regenerative load unit is configured to be connected to the unit under test, and is connected in parallel with the balanced supply unit of the system to output a constant current to the High voltage DC bus;
  • a DC conversion AC unit connected to the high voltage DC bus and output to the regenerative AC bus for converting the high voltage direct current to the alternating current required by the tested unit;
  • a switching unit one end for connecting to the tested unit, and the other end for connecting to the mains, the regenerative AC bus, for switching by a switch, selecting the mains or the regenerative AC bus
  • the unit under test provides the required alternating current.
  • the present invention also provides a load balancing control method, including the following processes;
  • the system balance supply unit and the regenerative load unit are connected in parallel through a high voltage DC bus, and the direct current is output to the DC conversion AC unit;
  • the state of the system balance supply unit, the regenerative load unit and the DC conversion AC unit is monitored in real time by the control unit, and real-time adjustment and control are made;
  • Switching by the switching unit according to the instruction of the control unit to select to access the mains, or to regenerate the AC bus to the input end of the tested unit; to provide the required AC power to the tested unit by the mains or regenerative AC bus.
  • the utility model has the beneficial effects that the system balance supply unit and the regenerative load unit are output in parallel to the DC conversion AC unit; the DC conversion AC unit returns the AC power to the regenerative AC bus, and the real-time monitoring and control of the control unit adjusts the balance supply unit of the system.
  • DC output, or the switching unit selects to connect the mains or regenerative AC bus to the tested unit; therefore, the DC load distribution balance can be realized, so that the system is not interfered by the mains grid and does not interfere with the mains grid, so it is not
  • An isolation transformer needs to be installed, eliminating the need for approval from the power supply department to reduce costs. At the same time, it simplifies application conditions and increases operational safety and reliability. In addition, it can improve the efficiency of feedback and further reduce energy consumption.
  • FIG. 1 is a diagram showing an example of a power aging system in the prior art
  • Figure 2 is a block diagram showing a configuration of a power aging system according to Embodiment 1 of the present invention
  • Figure 3 is a configuration diagram of a power aging system according to Embodiment 2 of the present invention.
  • Figure 4 is a block diagram showing a configuration of a control unit according to a second embodiment of the present invention.
  • Figure 5 is a diagram showing an example of a power aging system according to Embodiment 2 of the present invention.
  • Figure 6 is a diagram showing an example of a system balance supply unit of Embodiment 2 of the present invention.
  • Figure 7 is a view showing an example of a regenerative load unit of Embodiment 2 of the present invention.
  • Figure 8 is a diagram showing an example of a switching unit of Embodiment 2 of the present invention.
  • Figure 9 is a diagram showing an example of a DC conversion AC unit according to Embodiment 2 of the present invention.
  • 10 is a flowchart of an internal grid connection method according to Embodiment 3 of the present invention.
  • Figure 11 is a schematic diagram of a DC load distribution constant current balance according to Embodiment 3 of the present invention.
  • FIG. 12 is a flowchart of an internal grid connection method according to Embodiment 4 of the present invention.
  • FIG 13 is a flow chart showing the control process of Embodiment 4 of the present invention. detailed description
  • the embodiment of the present invention provides a power aging system.
  • the power aging system includes: a system balance supply unit 201, a regenerative load unit 202, and a DC conversion AC unit 203;
  • the system balance supply unit 201 is connected to the mains and output to the high voltage DC bus for generating the DC power required for the constant current balance of the power aging system; the system balance supply unit 201 outputs a fixed voltage, and the power supply is aged by increasing or decreasing the output current. The system maintains a constant current balance;
  • the regenerative load unit 202 is connected to the device under test 200 and connected in parallel with the system balance supply unit 201, and is boosted and output to the high voltage DC bus for converting the low voltage direct current outputted by the test unit 200 into high voltage direct current; Constant current
  • the DC conversion AC unit 203 is connected to the high voltage DC bus and output to the regenerative AC bus for converting the high voltage DC power into the AC power required by the test unit 200, and then returns the AC power to the device under test 200 through the regenerative AC bus.
  • the system share supply unit (System Share Supply) 201 may include an AC/DC conversion unit configured to be a fixed voltage output, and the input of the system balance supply unit 201 is connected to an AC line. Extracting electricity from the commercial power
  • the renewable load unit (Renewable Load) 202 may include a DC/DC conversion unit set to a constant current output, and the output voltage of the regenerative load unit may be set higher than the system balance supply unit.
  • the fixed voltage of 201 is 3-5%;
  • the regenerative load unit 202 may be one or more, each regenerative load unit 202 is connected to one tested unit 200; the regenerative load unit 202 may be programmed, and the input terminals may be connected to different voltages and currents, and thus, may be tested according to The specifications of unit 200 are loaded with different currents to meet the needs of unit under test 200.
  • the system balance supply unit 201 and the regenerative load unit 202 can be output in parallel to a high voltage DC bus (HVDC Bus, High Voltage DC Bus); therefore, DC load distribution can be realized.
  • HVDC Bus High Voltage DC Bus
  • DC load distribution can be realized.
  • the principle of DC load distribution balance is adopted to balance the automatic balancing operation of the feedback energy of the whole machine, and the hardware is automatically balanced at a high speed, thereby reducing the communication busy caused by using the software and reducing the occurrence of errors.
  • a DC/AC Inverter 203 can be used to convert the high voltage DC power into a voltage and frequency required by the test unit 200, and generate a digital sine wave by digital signal processing (DSP).
  • DSP digital signal processing
  • the power has different options, such as 1KW, 2KW or 3KW, to meet the needs of different products. Therefore, the efficiency of feedback can be improved, and energy consumption can be further reduced.
  • the power aging system adopts an internal grid-connecting method, and the DC load distribution constant current balance replaces the grid-connecting method in the prior art, which simplifies the application conditions, increases the safety and reliability of the operation.
  • the system balance supply unit and the regenerative load unit are output in parallel to the DC conversion AC unit through the high voltage DC bus; the DC conversion AC unit returns the AC power to the tested unit through the regenerative AC bus; therefore, the DC load can be realized.
  • the balance is distributed, there is no need to install an isolation transformer, and the approval of the power supply department is not required, which reduces the cost; in addition, the efficiency of feedback can be improved, and the energy consumption can be further reduced.
  • the embodiment of the present invention provides a power aging system.
  • the power aging system includes: a system balance supply unit 301, a regenerative load unit 302, and a DC conversion AC unit 303.
  • the present invention does not Let me repeat.
  • the power aging system may further include: a switching unit 304;
  • One end of the switching unit 304 is connected to the unit under test 300, and the other end is connected to a mains or regenerative AC bus for switching by a switch to supply the mains or regenerative AC bus with the required alternating current for the unit under test 300.
  • the switching unit 304 can connect the input end of the tested unit to the system sharing power (System Share Power), or connect to the regenerative AC bus to obtain the regenerative energy that is fed back; therefore, the power loss of the system can be improved, and the power can be increased.
  • System Share Power system sharing power
  • the power aging system may further include: a control unit 305;
  • the control unit 305 is configured to monitor the state of the system balance supply unit 301, the regenerative load unit 302 DC conversion AC unit 303, and the switching unit 304 in real time, and make real-time adjustment and control.
  • the control unit 305 may include a digital signal processing (DSP) unit, which can be controlled in real time by using the TMS320F2808. Therefore, the input voltage/current, output voltage/current of each unit can be monitored; Monitor the switching current of the Power Stage power tube.
  • DSP digital signal processing
  • control unit 305 can adopt RS 422 as a communication method, and can perform monitoring and data logging (Data Logging) through software setting and reading parameters.
  • Data Logging monitoring and data logging
  • control unit 305 may specifically include: a value obtaining unit 401, a balance determining unit 402, and a signal transmitting unit 403;
  • the value obtaining unit 401 is configured to acquire currents and voltages of the system balance supply unit 301, the regenerative load unit 302, the DC conversion AC unit 303, and the switching unit 304;
  • the balance determining unit 402 is configured to determine, according to the value obtained by the value obtaining unit 401, whether the power aging system operates in balance; the signal sending unit 403 is configured to send a control signal to the system balancing supply unit 301 when the balance determining unit 402 determines that there is no balanced operation, The output power of the system balance supply unit 301 is adjusted, and therefore, the constant current balance of the system can be re-implemented.
  • the balance determining unit and the signal sending unit of the control unit 305 can also be implemented by a Micro Control Unit (MCU), and specific implementation manners can be determined according to specific situations.
  • MCU Micro Control Unit
  • the power aging system may include a plurality of switching units 304, each of which is connected to a unit under test.
  • the signal sending unit 403 is further configured to: when the balance determining unit 402 determines that there is no balanced operation, send a control signal to at least one of the plurality of switching units 304 to enable the at least one switching unit to switch, and thus, may also be re-implemented The constant current balance of the system.
  • FIG. 5 is a diagram showing an example of a power aging system.
  • the power aging system includes: a system balance supply unit, 52 regenerative load units, and a DC conversion AC unit; and further includes a control unit, each regenerative load unit corresponding to one tested unit and One switching unit 3 ⁇ 4, 13 switching units are connected to the mains and the tested unit, and the other 39 switching units are connected to the regenerative AC bus and the unit under test.
  • the power of the DC conversion AC unit is 3KW
  • the efficiency is 902 ⁇ 4
  • the output power of the tested unit is 60W
  • the efficiency is 88%
  • the input power consumption is 68. 2W
  • the efficiency of the system balance supply unit is 90%.
  • the output power is 22. 5W
  • the input power consumption is 25W
  • the efficiency of the regenerative load unit is 94%.
  • the power aging system can be divided into four parts for convenience of calculation and detailed description: A) comprising a system balanced supply unit, 13 switching units, 13 tested units, and 13 regenerative load units; the part of the input is connected to the mains and output to the high voltage DC bus;
  • B) includes 39 switching units, 39 tested units and 39 regenerative load units; the input is connected to the regenerative AC bus and output to the high voltage DC bus;
  • D) includes a control unit, the micro control unit (MCU, Micro Control Unit) of the control unit communicates with each unit of the system in the manner of RS422 via a communication bus, and sends control commands to each unit; Monitor (PC Monitor) or host computer.
  • the host computer can use the communication bus such as RS422 to monitor the MCU, record data, and set parameters.
  • the system balance supply unit may include a Pulse Width Modulation (PIC) controller, an AC/DC converter, and a rectifier ( Rectifier), etc., but not limited to this, the specific implementation of the system balance supply unit can be determined according to the specific situation.
  • the input commercial power is rectified by the rectifier, and then converted into a constant voltage DC output to the regenerative DC bus by the AC/DC converter, and the P-controller receives the control signal of the control unit to provide the P-signal for the AC/DC converter.
  • the P-controller samples the voltage signal output by the AC/DC converter and feeds it back to the control unit.
  • FIG. 7 is a diagram showing an example of the switching unit in FIG. 5.
  • the switching unit may include a switch SW1, a switch SW2, and the like, but is not limited thereto, and a specific implementation manner of the switching unit may be determined according to a specific situation.
  • the switch SW1 has two input contacts, one input contact is connected to the mains, and the other input is connected to the regenerative AC bus. The input contact is switched according to the control signal of the control unit to select the mains or regenerative AC to be connected to the tested unit.
  • the regenerative load unit may include a DC/DC converter or the like. However, it is not limited thereto, and a specific implementation manner of the regenerative load unit may be determined according to a specific situation.
  • the DC/DC converter comprises a P-controller, a switch module, a transformer and a rectifier. Under the control of the control unit, the P-signal generated by the P-controller drives the switch module to resonate, and the resonant signal is converted by a transformer. The smoothed DC output to the regenerative DC bus is rectified by the rectifier.
  • the DC conversion AC unit may include a DC/AC converter or the like, and the DC/AC converter includes an IGBT driver, an IGBT switch, and an LC. Filters, etc., but are not limited thereto, and specific implementations of the DC conversion AC unit may be determined according to specific conditions.
  • the digital signal processing DSP of the control unit generates a digital sine wave, drives the IGBT driver, the IGBT driver further drives the IGBT switch tube, and then filters the high frequency portion through the LC filter to output the sine wave alternating current; and then returns the alternating current through the regenerative AC bus. To the unit being tested. Therefore, the efficiency of feedback can be improved, and energy consumption can be further reduced.
  • the numerical value obtaining unit includes a plurality of voltage sensors and current sensors for real-time sampling, which are respectively used for a sampling system balance supply unit, a regenerative load unit, a DC conversion AC unit, and The voltage and current of the switching unit; the functions of the balance determining unit and the signal transmitting unit are implemented by one of the micro control unit MCU or the digital signal processing unit DSP.
  • the constant current balance is realized, and the isolation transformer is not required to be installed; and the load current of the tested unit can be independently controlled to meet the needs of the tested unit; in addition, the efficiency of feedback can be improved, and the energy consumption can be further reduced.
  • control unit can determine whether the system is balanced according to the current and voltage detected in real time; when it is determined that there is no balanced operation, the control signal can be sent to the system balancing supply unit or the switching unit for real-time control, To re-implement the system's constant current balance.
  • the control unit can determine that the entire system has no balanced operation;
  • the control unit can re-implement the constant current balance of the system in two ways: (1) send a control signal to the system balance supply unit, so that the system balances the supply unit to increase the output power; or (2) to the remaining 38 parts of the B part.
  • One of the switching units for example, the 22nd switching unit #PSCS_22 transmits a control signal, causes the switching unit to switch, and switches the corresponding tested unit from the regenerative AC bus connection to the mains connection. Therefore, the constant current balance of the system can be re-implemented.
  • the system balance supply unit and the regenerative load unit are output in parallel to the DC conversion AC unit through the high voltage DC bus; the DC conversion AC unit returns the AC power to the tested unit through the regenerative AC bus; therefore, the DC load can be realized.
  • Distribution balance no need to install isolation transformer, no need for power supply department approval, reduce cost; and can independently control the load current of the tested unit to meet the needs of the tested unit; In addition, it can improve the efficiency of feedback, further reduce energy Consumption.
  • the power aging system of this embodiment is basically as described in Embodiment 2, and details are not described herein again.
  • the main difference from Embodiment 2 is that in addition to the analog signal such as sampling current and voltage and the function of AC/DC conversion is implemented by hardware, other functions of the control unit are implemented by software function modules, by the upper computer. Run each software function module to realize online control of the system balance supply unit, regenerative load unit, DC conversion AC unit and switching unit; also modify and set the system according to different tested units through the man-machine dialogue window of the host computer
  • the control parameters of the balance supply unit, the regenerative load unit, the DC conversion AC unit, and the balance determination unit and the signal transmission unit are balanced. Therefore, the operation of the system is more intuitive and adaptable, and it can be applied to the tested units of different shapes and specifications.
  • An embodiment of the present invention provides a load balancing control method for internal grid connection. As shown in FIG. 10, the method includes: Step 1001: Connect a system balance supply unit and a regenerative load unit in parallel through a high voltage DC bus, and pass a high voltage DC bus. Output DC power to the DC conversion AC unit;
  • Step 1002 The DC conversion AC unit returns AC power to the tested unit through the regenerative AC bus.
  • the system balance supply unit is connected to the mains and outputs a fixed voltage, and the regenerative load unit is connected to the unit under test and outputs a constant current; the system balance supply unit is used to generate DC power required for system constant current balance; the regenerative load unit is used for The low-voltage direct current outputted by the test unit is converted into high-voltage direct current; the direct-current conversion alternating current unit is used to convert the high-voltage direct current into the alternating current required by the tested unit.
  • the system balance supply unit is set to a fixed voltage output; the regenerative load unit is set to output a constant current, and the output voltage of the regenerative load unit can be set to be higher than a fixed voltage of the system balance supply unit by 3-5%.
  • the output current of the system balanced supply unit can be: Total current minus the sum of the constant current outputs in parallel.
  • Figure 11 is a schematic diagram of the DC Load Share using Constant Current Balance Method, which shows how to set the system balance supply unit and the current and voltage of the regenerative load unit.
  • the load in Figure 11 is a 12 ohm resistor
  • the current on the DC bus is 1 A
  • the fixed voltage of the system balance supply unit is 12 V
  • the output current of the regenerative load unit is constant at 0.2 A.
  • the system balance supply unit and the regenerative load unit are output in parallel to the DC conversion AC unit through the high voltage DC bus; the DC conversion AC unit returns the AC power to the tested unit through the regenerative AC bus; therefore, the DC load can be realized.
  • the balance is distributed, there is no need to install an isolation transformer, and the approval of the power supply department is not required, which reduces the cost; in addition, the efficiency of feedback can be improved, and the energy consumption can be further reduced.
  • An embodiment of the present invention provides a load balancing control method for internal grid connection. As shown in FIG. 12, the method includes: Step 1201: Connect a system balance supply unit and a regenerative load unit in parallel through a high voltage DC bus, and pass the high voltage The DC bus outputs DC power to the DC conversion AC unit;
  • the system balance supply unit is connected to the mains and outputs a fixed voltage, and the regenerative load unit is connected to the unit under test and outputs a constant current; the system balance supply unit is used to generate high voltage direct current required for system constant current balance; The load unit is used to convert the low voltage direct current outputted by the tested unit into high voltage direct current.
  • Step 1202 The DC conversion AC unit returns AC power to the tested unit through the regenerative AC bus.
  • the DC conversion AC unit is used to convert the high voltage DC power into the AC power required by the unit under test.
  • Step 1203 Switching by the switching unit to connect the tested unit to the mains, or to connect the tested unit to the regenerative AC bus; the mains or regenerative AC bus provides the required AC power to the tested unit.
  • step 1204 the status of the system balance supply unit, the regenerative load unit, the DC conversion AC unit, and the switching unit is monitored in real time, and real-time adjustment and control are performed.
  • step 1204 may further include:
  • Step 1301 according to the DC load constant current balance principle, increase/decrease the current of the system balance supply unit.
  • Step 1302 Determine whether the currents of the regenerative load unit, the DC conversion AC unit, and the switching unit change; if yes, perform step 1301; if not, perform step 1303.
  • Step 1303 Acquire current and voltage of the system balance supply unit, the regenerative load unit, the DC conversion AC unit, and the switching unit through the communication bus.
  • Step 1304 Determine whether the power aging system operates in equilibrium according to the current and the voltage; if the operation is balanced, perform step 1303 to continue real-time monitoring; if there is no balanced operation, perform step 1305 or step 1306.
  • Step 1305 sending a control signal to the system balance supply unit to adjust the output power of the system balance supply unit.
  • Step 1306 Send a control signal to at least one of the plurality of switching units of the power aging system, so that the at least one switching unit performs switching.
  • the system balance supply unit and the regenerative load unit are output in parallel to the DC conversion AC unit through the high voltage DC bus; the DC conversion AC unit returns the AC power to the tested unit through the regenerative AC bus; therefore, the DC load can be realized.
  • Distribution balance no need to install isolation transformer, no need for power supply department approval, reduce cost; Moreover, it can independently control the load current of the tested unit to meet the needs of the tested unit; In addition, it can improve the efficiency of feedback and further reduce Energy consumption.
  • RAM random access memory
  • ROM read-only memory
  • EEPROM electrically programmable ROM
  • EEPROM electrically erasable programmable ROM
  • registers hard disk, removable disk, CD-ROM, or technical field Any other form of storage medium known.

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Description

Figure imgf000003_0001
电源老化系统及负载平衡控制方法 技术领域
本发明涉及电力电子技术领域, 特别涉及一种电源老化系统及负载平衡控制方法。 背景技术
为了达到很高的可靠性, 电子产品在出厂前通常需要进行全功率的老化过程, 一般老化系统 使用电阻作为功率负载, 电能被转化为热能浪费掉; 并且, 为了控制室内温度、 还需大量排气系 统将热量排出室外, 使环境升温。
目前, 已经出现将能源循环利用的电源老化方法及系统, 通过对老化的能量进行回馈, 可降 低能量损耗, 减少热量排放。 如图 1所示, 图 1为现有技术中电源老化系统的实例图, 在图 1中, 被 测试单元 (UUT, Unit Under Test ) 通过直流总线 (DC Bus , Direct Current Bus ) 输出直流 电至直流转换交流变换器 (DC/AC Inverter, Direct Current/Alternating Current Inverter), 直流转换交流变换器再通过再生交流总线 (Renewable AC Bus ) 将交流电回输至被测试单元。
但是在实现本发明的过程中, 发明人发现现有技术的缺陷在于: 现有的电源老化系统受市电 电网干扰, 需要安装隔离变压器, 因此, 需要供电部门的批核, 增加成本; 并且, 现有的电源老 化系统的加载功率固定, 不能满足被测试单元的需要; 此外, 回馈的效率低, 增加了能耗。 发明内容
为实现负载的平衡控制, 本发明提供一种电源老化系统, 该电源老化系统包括:
系统平衡供应单元, 用于与市电连接且输出固定电压至高压直流总线, 产生直流电; 再生负载单元, 用于与被测试单元连接, 且与所述系统平衡供应单元并联, 输出恒定电流至 所述高压直流总线;
直流转换交流单元, 与所述高压直流总线连接且输出至再生交流总线, 用于将高压直流电转 换为所述被测试单元所需要的交流电;
切换单元, 一端用于与所述被测试单元连接, 另一端用于与所述市电、 所述再生交流总线连 接, 用于通过开关进行切换, 选择所述市电或者所述再生交流总线为所述被测试单元提供所需的 交流电。
控制单元,用于实时监测所述系统平衡供应单元、 再生负载单元、 直流转换交流单元和切换 单元的状态, 并做出实时调整和控制; 通过增减所述系统平衡供应单元输出电流、和 /或选择所述 市电或者所述再生交流总线为所述被测试单元供电, 使所述电源老化系统保持恒流平衡。 同时, 本发明也提供了一种负载平衡控制方法, 包括如下进程;
由系统平衡供应单元、 再生负载单元通过高压直流总线并联,并将直流电输出至所述直流转 换交流单元;
由直流转换交流单元将所述直流电变换为用于回输至被测试单元的交流电,通过再生交流总 线输出;
由控制单元实时监测系统平衡供应单元、 再生负载单元和直流转换交流单元的状态,并做出 实时调整和控制;
由切换单元根据所述控制单元的指令进行切换,以选择接入市电、 或者再生交流总线至被测 试单元的输入端; 由市电或者再生交流总线为被测试单元提供所需的交流电。
本发明有益效果在于, 系统平衡供应单元、 以及再生负载单元并联输出至直流转换交流单 元; 直流转换交流单元回输交流电至再生交流总线, 通过控制单元的实时监测与控制, 调整系统 平衡供应单元的直流输出, 或由切换单元选择将市电或再生交流总线接入被测试单元; 因此, 可 实现直流负载分配平衡, 使系统不受市电电网的干扰, 也不会干扰市电电网, 故不需要安装隔离 变压器, 不需要供电部门的批核, 减少成本; 同时, 简化了应用条件、 增加了操作的安全性及可 靠性。 此外, 还可提高回馈的效率, 进一步降低能耗。 附图说明
此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部分, 并不构成对本发 明的限定。 在附图中:
图 1是现有技术中电源老化系统的实例图;
图 2是本发明实施例 1的电源老化系统的构成图;
图 3是本发明实施例 2的电源老化系统的构成图;
图 4是本发明实施例 2的控制单元的构成图;
图 5是本发明实施例 2的电源老化系统的一个实例图;
图 6是本发明实施例 2的系统平衡供应单元的一个实例图;
图 7是本发明实施例 2的再生负载单元的一个实例图;
图 8是本发明实施例 2的切换单元的一个实例图;
图 9是本发明实施例 2的直流转换交流单元的一个实例图; 图 10是本发明实施例 3的内部并网方法的流程图;
图 11是本发明实施例 3的直流负载分配恒流平衡的原理图;
图 12是本发明实施例 4的内部并网方法的流程图;
图 13是本发明实施例 4的控制过程的流程图。 具体实施方式
为使本发明的目的、 技术方案和优点更加清楚明白,下面结合附图对本发明实施例作进一步 详细说明。 在此, 本发明的示意性实施例及其说明用于解释本发明, 但并不作为对本发明的限定 实施例 1
本发明实施例提供一种电源老化系统, 如图 2所示, 该电源老化系统包括: 系统平衡供应单 元 201、 再生负载单元 202和直流转换交流单元 203; 其中,
系统平衡供应单元 201与市电连接且输出至高压直流总线, 用于产生电源老化系统恒流平衡 所需的直流电; 系统平衡供应单元 201输出固定电压,通过增加或者减少输出电流使所述电源老化 系统保持恒流平衡;
再生负载单元 202与被测试单元 200连接, 且与系统平衡供应单元 201并联, 升压后输出至高 压直流总线, 用于将被测试单元 200输出的低压直流电转换为高压直流电; 再生负载单元 202输出 恒定电流;
直流转换交流单元 203与高压直流总线连接且输出至再生交流总线, 用于将高压直流电转换 为被测试单元 200所需要的交流电, 再通过再生交流总线将交流电回输至被测试单元 200。
在本实施例中, 系统平衡供应单元 (System Share Supply) 201可包括 AC/DC转换单元, 设 定为固定电压输出, 该系统平衡供应单元 201的输入端与市电 (AC Line) 连接, 可从市电提取电 在本实施例中, 再生负载单元 (Renewable Load) 202可包括 DC/DC转换单元, 设定为恒定电 流输出, 并且再生负载单元的输出电压可设定高于系统平衡供应单元 201的固定电压 3-5%;
此外, 再生负载单元 202可为一个或多个, 每个再生负载单元 202连接一个被测试单元 200; 再生负载单元 202可以是程控的, 输入端可连接不同电压及电流, 因此, 可按照被测试单元 200的 规格加载不同电流, 从而满足被测单元 200的需求。
在本实施例中 , 系统平衡供应单元 201、 再生负载单元 202可并联输出至高压直流总线 ( HVDC Bus , High Voltage DC Bus ) ; 因此 , 可实现直流负载分配 (DC Constant Current Balance Load Share ), 达到整个系统的恒流平衡, 由于使用内部并网方 法, 使系统不受市电电网的干扰, 也不会干扰市电电网; 不需要安装隔离变压器, 不需要供电部 门的批核, 减少成本。
此外, 在本实施例中, 采用了直流负载分配平衡的原理平衡整机回馈电能的自动平衡运作, 通过硬件高速自适应平衡, 因此, 可减轻使用软件所导致的通讯繁忙, 减少错误的发生。
在本实施例中, 直流转换交流单元 (DC/AC Inverter ) 203可用于将高压直流电转换为被测 试单元 200所需要的电压及频率, 通过数字信号处理 (DSP, Digital Signal Processing) 产生数 字正弦波去推动 IGBT开关管, 再通过 LC滤波将高频部分滤掉, 输出纯正正弦波交流电; 再通过再 生交流总线 (Renewable AC Line ) 将交流电回输至被测试单元 200; 该直流转换交流单元 203的功 率有不同选配, 如 1KW、 2KW或者 3KW, 去配合不同产品的需要。 因此, 可提高回馈的效率, 进一步 降低能耗。
在本实施例中, 电源老化系统采用了内部并网方法, 通过直流负载分配恒流平衡代替现有技 术中的并网方法, 简化了应用条件、 增加了操作的安全性及可靠性。
由上述实施例可知,通过高压直流总线将系统平衡供应单元、 以及再生负载单元并联输出至 直流转换交流单元; 直流转换交流单元通过再生交流总线回输交流电至被测试单元; 因此, 可实 现直流负载分配平衡, 不需要安装隔离变压器, 不需要供电部门的批核, 减少成本; 此外, 还可 提高回馈的效率, 进一步降低能耗。
实施例 2
本发明实施例提供一种电源老化系统, 如图 3所示, 该电源老化系统包括: 系统平衡供应单 元 301、 再生负载单元 302和直流转换交流单元 303; 如实施例 1所述, 此处不再赘述。
如图 3所示, 电源老化系统还可包括: 切换单元 304;
切换单元 304的一端与被测试单元 300连接, 另一端与市电或者再生交流总线连接, 用于通过 开关进行切换, 使市电或者再生交流总线为被测试单元 300提供所需的交流电。
因此, 切换单元 304可将被测试单元的输入端连接到市电产生系统共享能源 (System Share Power), 或者, 连接到再生交流总线得到回馈的再生能源; 因此, 可提高系统损耗的功率, 提高 系统的整机效率。
如图 3所示, 电源老化系统还可包括: 控制单元 305;
控制单元 305用于实时监测系统平衡供应单元 301、 再生负载单元 302直流转换交流单元 303 和切换单元 304的状态, 并做出实时调整和控制。 在本实施例中, 控制单元 305可包括数字信号处理 (DSP, Digital Signal Processing) 单 元, 可采用 TMS320F2808来进行实时控制, 因此, 可监测各个单元的输入电压 /电流、 输出电压 / 电流; 还可监测 Power Stage功率管的开关电流。
在本实施例中, 控制单元 305可采用 RS 422作为通信方式, 可以通过软件设定、 以及读取参 数来进行监测及数据记录 (Data Logging) 。 但不限于此, 可根据实际情况确定具体实施方式。
如图 4所示, 该控制单元 305具体可包括: 数值获取单元 401、 平衡确定单元 402和信号发送单 元 403; 其中,
数值获取单元 401用于获取系统平衡供应单元 301、 再生负载单元 302、 直流转换交流单元 303和切换单元 304的电流和电压;
平衡确定单元 402用于根据数值获取单元 401获取的数值确定电源老化系统是否平衡运行; 信号发送单元 403用于在平衡确定单元 402确定没有平衡运行时, 向系统平衡供应单元 301发 送控制信号, 以调节系统平衡供应单元 301的输出功率, 因此, 可重新实现系统的恒流平衡。
在本实施例中, 控制单元 305的平衡确定单元和信号发送单元还可通过微控制单元 (MCU, Micro Control Unit ) 实现, 可根据具体情况确定具体的实施方式。
如图 3所示, 电源老化系统可包括多个切换单元 304, 每个切换单元 304连接一个被测试单元
300;
信号发送单元 403还用于在平衡确定单元 402确定没有平衡运行时, 向多个切换单元 304中的 至少一个切换单元发送控制信号, 以使该至少一个切换单元进行切换, 因此, 也可重新实现系统 的恒流平衡。
以下通过实例、 结合图 5至图 9对该电源老化系统、 以及该电源老化系统的工作流程进行进 一步的详细说明。
图 5是一个电源老化系统的实例图。 如图 5所示, 该电源老化系统中包括: 一个系统平衡供应 单元、 52个再生负载单元、 一个直流转换交流单元; 此外, 还包括一个控制单元, 每个再生负载 单元对应一个被测试单元以及一个切换单 ¾ 其中, 13个切换单元连接市电与被测试单元,另外 39 个切换单元连接再生交流总线与被测试单元。
在本实施例中,该直流转换交流单元的功率为 3KW,效率为 90¾被测试单元的输出功率为 60W, 效率为 88%, 输入消耗功率为 68. 2W; 系统平衡供应单元的效率为 90%, 输出功率为 22. 5W,输入消耗 功率为 25W; 再生负载单元的效率为 94%。
在本实施例中, 为方便计算及详细说明, 可将该电源老化系统划分为四部分: A)包括 1个系统平衡供应单元、 13个切换单元、 13个被测试单元、 13个再生负载单元; 该部 分输入端与市电连接, 输出至高压直流总线;
在恒流平衡的情况下, 部分 A的输入所需的功率为: 68. 2W*13 + 25W = 911. 6W; 输出到高压 直流总线的功率为: (60W*94%) *13 + 22. 5W = 755. 7W;
B ) 包括 39个切换单元、 39个被测试单元和 39个再生负载单元; 该部分输入端与再生交流总 线连接, 输出至高压直流总线;
在恒流平衡的情况下, 部分 B的输入所需功率为: 68. 2W*39 = 2659. 8W; 输出到高压直流总 线的功率为: (60W*94%) *39 = 2199. 6W;
C)包括 1个直流转换交流单元; 该部分输入端与高压直流总线连接, 输出至再生交流总线; 在恒流平衡的情况下,部分 C的输入功率为: 755. 7W + 2199. 6W = 2955. 3¾输出功率为 2659. 8W
D) 包括 1个控制单元, 该控制单元的微控制单元 (MCU, Micro Control Unit ), 通过通信总 线 (Communication Bus ) 以 RS422的方式与系统各个单元通信, 向各个单元发送控制指令; 还可 连接监视器 (PC Monitor) 或上位计算机。 上位计算机可采用 RS422等通信总线, 对 MCU进行监测 及数据记录、 进行参数设定等。
由上述电源老化系统可知, 该电源老化系统从市电获得的电量为 911. 6W; 若 52个被测试单元 直接连接市电则需耗电: 68. 2W*52 = 3546. 4W; 因此, 通过该电源老化系统, 可节省电能: ( 3546. 4-911. 6) /3546. 4 = 74. 29%。
图 6为图 5中的系统平衡供应单元的一个实例图, 如图 6所示, 系统平衡供应单元可包括脉冲 宽度调制 (P丽, Pulse Width Modulation) 控制器、 AC/DC转换器、 整流器 (Rectifier) 等, 但 不限于此, 可根据具体情况确定系统平衡供应单元的具体实施方式。 由整流器对输入的市电进行 整流, 再通过 AC/DC转换器转换为恒压直流输出至再生直流总线, P丽控制器则接受控制单元的控 制信号, 为 AC/DC转换器提供 P丽信号, 以实现对 AC/DC转换器输出的恒压控制; 同时, P丽控制器 采样 AC/DC转换器输出的电压信号, 反馈给控制单元。
图 7为图 5中的切换单元的一个实例图, 如图 7所示, 切换单元可包括切换开关 SW1、 开关 SW2 等,但不限于此,可根据具体情况确定切换单元的具体实施方式。 切换开关 SW1具有两个输入接点, 一个输入接点连接市电, 另一个输入接点连接再生交流总线, 根据控制单元的控制信号切换输入 接点, 以选择市电或再生交流电接入被测试单元中。
图 8为图 5中的再生负载单元的一个实例图,如图 8所示,再生负载单元可包括 DC/DC转换器等, 但不限于此,可根据具体情况确定再生负载单元的具体实施方式。 该 DC/DC转换器包括 P丽控制器、 开关模块、 变压器和整流器等, 在控制单元的控制下, P丽控制器产生的 P丽信号驱动开关模块作 谐振, 该谐振信号由变压器实现电压变换, 由整流器整流输出平滑的直流至再生直流总线。
图 9为图 5中的直流转换交流单元的一个实例图, 如图 9所示, 直流转换交流单元可包括 DC/AC 转换器等, 该 DC/AC转换器包括 IGBT驱动器、 IGBT开关管和 LC滤波器等, 但不限于此, 可根据具体 情况确定直流转换交流单元的具体实施方式。 通过控制单元的数字信号处理 DSP产生数字正弦波, 推动 IGBT驱动器, IGBT驱动器进一步驱动 IGBT开关管, 再通过 LC滤波将高频部分滤掉, 输出正弦 波交流电; 再通过再生交流总线将交流电回输至被测试单元。 因此, 可提高回馈的效率, 进一步 降低能耗。
结合图 5至图 9, 本实施例的控制单元中, 数值获取单元包括用于实时采样的多个电压传感器 和电流传感器, 分别用于采样系统平衡供应单元、 再生负载单元、 直流转换交流单元和切换单元 的电压和电流; 平衡确定单元和信号发送单元的功能由微控制单元 MCU或数字信号处理单元 DSP之 一来实现。
通过上述电源老化系统, 实现了恒流平衡, 不需要安装隔离变压器; 并且可独立控制被测试 单元的加载电流, 满足被测试单元的需要; 此外, 还可提高回馈的效率, 进一步降低能耗。
此外, 当系统的状态发生变化时, 控制单元根据实时监测到的电流和电压可确定系统是否平 衡运行; 在确定没有平衡运行时, 可向系统平衡供应单元或者切换单元发送控制信号进行实时控 制, 以重新实现系统的恒流平衡。
例如, 图 5中的第 14个被测试单元突然损坏, 控制单元实时监测到该被测试单元对应的再生 负载单元# -14的输出电流为 0, 则控制单元可确定整个系统没有平衡运行; 此时, 控制单元可采 用两种方法重新实现系统的恒流平衡: (1 ) 向系统平衡供应单元发送控制信号, 使系统平衡供应 单元增大输出功率; 或者 (2 ) 向 B部分的其余 38个切换单元中的一个切换单元, 例如第 22个切换 单元 #PSCS_22发送控制信号, 使该切换单元进行切换, 将对应的被测试单元从与再生交流总线连 接切换到与市电连接。 因此, 可重新实现系统的恒流平衡。
由上述实施例可知,通过高压直流总线将系统平衡供应单元、 以及再生负载单元并联输出至 直流转换交流单元; 直流转换交流单元通过再生交流总线回输交流电至被测试单元; 因此, 可实 现直流负载分配平衡, 不需要安装隔离变压器, 不需要供电部门的批核, 减少成本; 并且可独立 控制被测试单元的加载电流, 满足被测试单元的需要; 此外, 还可提高回馈的效率, 进一步降低 能耗。 实施例 3
本实施例的电源老化系统, 基本如实施例 2所述, 此处不再赘述。 与实施例 2主要的不同之处 在于,除了采样电流和电压等模拟信号并将其作 AC/DC转换的功能由硬件实施外,控制单元的其他 功能由软件功能模块来实现, 籍由上位计算机运行各软件功能模块, 实现对系统平衡供应单元、 再生负载单元、 直流转换交流单元和切换单元的在线控制; 还可以根据不同的被测试单元, 通过 上位计算机的人机对话窗口修改、 设定系统平衡供应单元、 再生负载单元、 直流转换交流单元及 平衡确定单元和信号发送单元的各控制参数。 因此, 使系统的操作更为直观, 适应性更强, 可适 用于不同形态、 规格的被测试单元。
实施例 4
本发明实施例提供一种内部并网的负载平衡控制方法, 如图 10所示, 该方法包括: 步骤 1001, 通过高压直流总线将系统平衡供应单元、 以及再生负载单元并联, 并通过高压直 流总线将直流电输出至直流转换交流单元;
步骤 1002, 直流转换交流单元通过再生交流总线回输交流电至被测试单元;
其中, 系统平衡供应单元与市电连接且输出固定电压, 再生负载单元与被测试单元连接且输 出恒定电流; 系统平衡供应单元用于产生系统恒流平衡所需的直流电; 再生负载单元用于将被测 试单元输出的低压直流电转换为高压直流电; 直流转换交流单元用于将高压直流电转换为被测试 单元所需要的交流电。
在本实施例中,系统平衡供应单元设定为固定电压输出; 再生负载单元设定为输出恒定电流, 并且再生负载单元的输出电压可设定高于系统平衡供应单元的固定电压 3-5%; 系统平衡供应单元 的输出电流可为: 总电流减去并联的恒定电流输出之和。
以下通过实例、 结合图 11对如何设定系统平衡供应单元、 以及再生负载单元的电流和电压 进行详细说明。
图 11为直流负载恒流平衡 (DC Load Share using Constant Current Balance Method) 的 原理图, 用于说明如何设定系统平衡供应单元、 以及再生负载单元的电流和电压。 为简化起见, 图 11中的负载采用 12欧姆的电阻, DC总线上的电流为 1A,系统平衡供应单元输出的固定电压为 12V, 再生负载单元的输出电流恒定为 0. 2A, 输出电压可设定高于固定电压 5%, BP 12V + 12V *5% = 12. 6V 。 但不限于此, 还可根据实际情况确定具体实施方式。
如图 11中步骤 1所示, 当仅有系统平衡供应单元输出到 DC总线时, 系统平衡供应单元的输出 电流 A1=1A; 如图 11中步骤 2所示, 当并联一个再生负载单元后, 系统平衡供应单元的输出电流 A1=1A - 0. 2A = 0. 8A;
如图 11中步骤 3所示 , 当再并联一个再生负载单元后 , 系统平衡供应单元的输出电流 A1=1A - 0. 2A-0. 2A = 0. 6A;
如图 11中步骤 4所示 , 当并联 n-1个再生负载单元后 , 系统平衡供应单元的输出电流 A1=1A - 0. 2A* ( n-1 ) 。
以上实例仅为如何设定系统平衡供应单元、 以及再生负载单元的电流和电压的示意性说明, 但不限于此, 可根据实际情况确定具体的实施方式。
由上述实施例可知,通过高压直流总线将系统平衡供应单元、 以及再生负载单元并联输出至 直流转换交流单元; 直流转换交流单元通过再生交流总线回输交流电至被测试单元; 因此, 可实 现直流负载分配平衡, 不需要安装隔离变压器, 不需要供电部门的批核, 减少成本; 此外, 还可 提高回馈的效率, 进一步降低能耗。
实施例 5
本发明实施例提供一种内部并网的负载平衡控制方法, 如图 12所示, 该方法包括: 步骤 1201, 通过高压直流总线将系统平衡供应单元、 以及再生负载单元并联, 并通过所述高 压直流总线将直流电输出至直流转换交流单元;
在本实施例中, 系统平衡供应单元与市电连接且输出固定电压, 再生负载单元与被测试单元 连接且输出恒定电流; 系统平衡供应单元用于产生系统恒流平衡所需的高压直流电; 再生负载单 元用于将被测试单元输出的低压直流电转换为高压直流电。
步骤 1202, 直流转换交流单元通过再生交流总线回输交流电至被测试单元;
在本实施例中, 直流转换交流单元用于将高压直流电转换为被测试单元所需要的交流电。 步骤 1203,通过切换单元进行切换以连接被测试单元与市电、 或者连接被测试单元与再生交 流总线; 市电或者再生交流总线为被测试单元提供所需的交流电。
步骤 1204,实时监测系统平衡供应单元、 再生负载单元、 直流转换交流单元和切换单元的状 态, 并做出实时调整和控制。
如图 13所示, 步骤 1204还可具体包括:
步骤 1301, 根据直流负载恒流平衡原理, 增加 /减少系统平衡供应单元的电流。
步骤 1302, 判断再生负载单元、 直流转换交流单元和切换单元的电流是否改变; 若改变, 则 执行步骤 1301 ; 若没有改变, 则执行步骤 1303。 步骤 1303,通过通信总线获取系统平衡供应单元、 再生负载单元、 直流转换交流单元和切换 单元的电流和电压。
步骤 1304,根据电流和电压确定电源老化系统是否平衡运行; 若平衡运行,则执行步骤 1303, 继续实时监测; 若没有平衡运行, 则执行步骤 1305或者步骤 1306。
步骤 1305, 向系统平衡供应单元发送控制信号, 以调节系统平衡供应单元的输出功率。 步骤 1306, 向电源老化系统的多个切换单元中的至少一个切换单元发送控制信号, 以使该至 少一个切换单元进行切换。
由上述实施例可知,通过高压直流总线将系统平衡供应单元、 以及再生负载单元并联输出至 直流转换交流单元; 直流转换交流单元通过再生交流总线回输交流电至被测试单元; 因此, 可实 现直流负载分配平衡, 不需要安装隔离变压器, 不需要供电部门的批核, 减少成本; 并且, 可独 立控制被测试单元的加载电流, 满足被测试单元的需要; 此外, 还可提高回馈的效率, 进一步降 低能耗。
专业人员还可以进一步意识到, 结合本文中所公开的实施例描述的各示例的单元及算法步 骤, 能够以电子硬件、 计算机软件或者二者的结合来实现, 为了清楚地说明硬件和软件的可互换 性, 在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。 这些功能究竟以硬件还是 软件方式来执行, 取决于技术方案的特定应用和设计约束条件。 专业技术人员可以对每个特定的 应用来使用不同方法来实现所描述的功能, 但是这种实现不应认为超出本发明的范围。
结合本文中所公开的实施例描述的方法或算法的步骤可以用硬件、 处理器执行的软件模块, 或者二者的结合来实施。 软件模块可以置于随机存储器 (RAM) 、 内存、 只读存储器 (ROM) 、 电 可编程 R0M、 电可擦除可编程 R0M、 寄存器、 硬盘、 可移动磁盘、 CD-R0M、 或技术领域内所公知的 任意其它形式的存储介质中。
以上所述的具体实施方式, 对本发明的目的、 技术方案和有益效果进行了进一步详细说明, 所应理解的是, 以上所述仅为本发明的具体实施方式而已, 并不用于限定本发明的保护范围, 凡 在本发明的精神和原则之内, 所做的任何修改、 等同替换、 改进等, 均应包含在本发明的保护范 围之内。

Claims

1.一种电源老化系统, 其特征在于, 所述电源老化系统包括:
系统平衡供应单元, 用于与市电连接且输出固定电压至高压直流总线, 产生直流电; 再生负载单元, 用于与被测试单元连接, 且与所述系统平衡供应单元并联, 输出恒定电流至 所述高压直流总线;
直流转换交流单元, 与所述高压直流总线连接且输出至再生交流总线, 用于将高压直流电转 换为所述被测试单元所需要的交流电;
切换单元, 一端用于与所述被测试单元连接, 另一端用于与所述市电、 所述再生交流总线连 接, 用于通过开关进行切换, 选择所述市电或者所述再生交流总线为所述被测试单元提供所需的 交流电。
控制单元,用于实时监测所述系统平衡供应单元、 再生负载单元、 直流转换交流单元和切换 单元的状态, 并做出实时调整和控制; 通过增减所述系统平衡供应单元输出电流、和 /或选择所述 市电或者所述再生交流总线为所述被测试单元供电, 使所述电源老化系统保持恒流平衡。
2. 根据权利要求 1所述的电源老化系统, 其特征在于, 所述控制单元具体包括: 数值获取单元,用于获取所述系统平衡供应单元、 再生负载单元和直流转换交流单元的电流 和电压;
平衡确定单元,用于根据所述数值获取单元获取的电流和电压确定所述电源老化系统是否平 衡运行;
信号发送单元, 用于在所述平衡确定单元确定没有平衡运行时, 向所述系统平衡供应单元发 送控制信号, 以调节所述系统平衡供应单元的输出功率。
3. 根据权利要求 1所述的电源老化系统, 其特征在于, 所述控制单元具体包括: 电流传感器, 采样所述系统平衡供应单元、 再生负载单元或直流转换交流单元的电流; 电压传感器, 采样所述系统平衡供应单元、 再生负载单元或直流转换交流单元的电压; 微控制单元 MCU或数字信号处理单元 DSP二者之一或之二, 根据采样数据, 判断 所述电源老化系统是否平衡运行; 实时调节所述系统平衡供应单元的输出功率, 和 /或选择 所述市电或者所述再生交流总线为所述被测试单元供电,
4. 根据权利要求 2或 3所述的电源老化系统, 其特征在于, 所述电源老化系统包括多个切换 单元, 每个切换单元连接一个被测试单元;
所述控制单元确定没有平衡运行时,向所述多个切换单元中的至少一个切换单元发送控制信 号, 以使所述至少一个切换单元进行切换。
5. 根据权利要求 2或 3所述的电源老化系统, 其特征在于, 所述系统平衡供应单元包括: 整流器, 对市电进行整流;
AC/DC转换器, 对所述整流器的输出进一步转化为固定电压输出至所述高压直流总线;
P丽控制器, 根据所述控制单元的控制信号实现对 AC/DC转换器输出电压和 /或电流的控制。
6. 根据权利要求 2或 3所述的电源老化系统, 其特征在于, 所述再生负载单元包括 :
DC/DC转换器, 在所述控制单元的控制下, 输出恒流到所述高压直流总线。
7. 根据权利要求 2或 3所述的电源老化系统, 其特征在于, 所述直流转换交流单元包括: DC/AC转换器, 将由所述高压直流总线输入的直流转换为交流电, 输出到所述再生交流总线。
8. 根据权利要求 2或 3所述的电源老化系统, 其特征在于, 所述控制单元通过通信总线实现 对所述系统平衡供应单元、 再生负载单元、 直流转换交流单元和切换单元的监测、 控制与数据记 录。
9. 根据权利要求 4所述的电源老化系统, 其特征在于, 所述再生负载单元具有多个; 每个再 生负载单元对应一个被测试单元以及一个切换单元。
10. 根据权利要求 4所述的电源老化系统, 其特征在于, 所述切换单元包括切换开关, 该切 换开关具有两个输入接点, 一个输入接点连接市电, 另一个输入接点连接再生交流总线, 根据控 制单元的控制信号切换输入接点, 以选择市电或再生交流电接入被测试单元中。
11. 根据权利要求 6所述的电源老化系统, 其特征在于, 所述 DC/DC转换器包括 P丽控制器、 开关模块、 变压器和整流器;
在所述控制单元的控制下, 所述 P丽控制器产生的 P丽信号驱动所述开关模块作谐振; 该谐振信号由所述变压器实现电压变换;
由所述整流器整流输出直流至所述再生直流总线。
12. 根据权利要求 7所述的电源老化系统, 其特征在于, 所述 DC/AC转换器包括 IGBT驱动器、 IGBT开关管和 LC滤波器;
通过所述控制单元推动 IGBT驱动器, IGBT驱动器进一步驱动
IGBT开关管, 再通过 LC滤波输出正弦波交流电;
由再生交流总线将交流电回输至所述切换单元输入端。
13. 一种负载平衡控制方法, 包括如下进程;
由系统平衡供应单元、 再生负载单元通过高压直流总线并联,并将直流电输出至所述直流转 换交流单元;
由直流转换交流单元将所述直流电变换为用于回输至被测试单元的交流电,通过再生交流总 线输出;
由控制单元实时监测系统平衡供应单元、 再生负载单元和直流转换交流单元的状态,并做出 实时调整和控制;
由切换单元根据所述控制单元的指令进行切换,以选择接入市电、 或者再生交流总线至被测 试单元的输入端; 由市电或者再生交流总线为被测试单元提供所需的交流电。
14. 如权利要求 13所述的负载平衡控制方法, 其特征在于,
所述控制单元实时监测系统平衡供应单元、 再生负载单元和直流转换交流单元的电流和 /或 电压;
根据直流负载恒流平衡原理, 所述控制单元控制所述系统平衡供应单元增加 /减少其输出电 流。
15. 如权利要求 13所述的负载平衡控制方法, 其特征在于,
所述控制单元实时监测系统平衡供应单元、 再生负载单元和直流转换交流单元的电流和 /或 电压;
根据直流负载恒流平衡原理, 所述切换单元根据所述控制单元的指令进行切换, 以选择一个 或多个被测试单元接入市电、 或者接入再生交流总线。
16. 如权利要求 13所述的负载平衡控制方法, 其特征在于,
所述控制单元实时获取系统平衡供应单元、 再生负载单元和直流转换交流单元的电流和电 压;
根据直流负载恒流平衡原理, 所述控制单元控制所述系统平衡供应单元增加 /减少其输出电 流; 同时, 所述切换单元根据所述控制单元的指令进行切换, 以选择连接一个或多个被测试单元 接入市电、 或者接入再生交流总线。
17. 如权利要求 14-16中任一项所述的负载平衡控制方法, 其特征在于, 所述再生负载单元、 切换单元与被测试单元一一对应; 所述再生负载单元在所述控制单元的控制下, 适用不同的电压 及电流输入。
18. 如权利要求 14-16中任一项所述的负载平衡控制方法, 其特征在于, 设定所述系统平衡 供应单元为固定电压输出, 所述系统平衡供应单元的输出电流为: 总电流减去并联的恒定电流输 出之和。
19. 如权利要求 18所述的负载平衡控制方法, 其特征在于, 设定所述再生负载单元为恒流输 出, 且输出电压高于所述系统平衡供应单元的固定电压 3-5%。
PCT/CN2011/073781 2010-06-04 2011-05-06 电源老化系统及负载平衡控制方法 WO2011150733A1 (zh)

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