CN104868755A - High-power bidirectional multi-way direct-current simulation power supply - Google Patents
High-power bidirectional multi-way direct-current simulation power supply Download PDFInfo
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Abstract
The invention discloses a high-power bidirectional multi-way direct-current simulation power supply. The high-power bidirectional multi-way direct-current simulation power supply is characterized by consisting of at least two mutually insulated simulation direct-current power supply units, wherein each simulation direct-current power supply unit comprises an AC/DC converter and a DC/DC converter which are connected in series; an input end of each AC/DC converter is connected with a secondary side winding of an input transformer; an input end of each DC/DC converter is connected with a capacitor in parallel, and a positive electrode of an output end of each DC/DC converter is connected with a diode in series; two ends of each diode are respectively connected with a switch in parallel. The high-power bidirectional multi-way direct-current simulation power supply is universal in function, only needs to adopt different control strategies, can widen the functions without replacing hardware, and solves the problems of high testing cost of existing DC equipment, small capacity, difficulty in expansion, single voltage level and functions and the like.
Description
Technical field
The invention belongs to convertor equipment technical field of measurement and test, being specifically related to the analog DC power supply for testing the great power conversion circuit equipment property indices such as various DC/DC, DC/AC.
Background technology
21 century is environmental protection and energy-conservation century, during this period of time various new energy technology is (as photovoltaic generation, electric automobile, double source trolley bus) and large power energy storage equipment (as super capacitor group, NaS battery pack) all get a lot of applications.And in these applications, DC/DC unit and DC/AC unit are one of core component, its property relationship is to the technical indicator such as function, utilance, reliability of each system.Therefore need a comprehensive test platform, the property indices of various DC/AC, DC/DC convertor equipment can be detected, ensure that the performance of these convertor equipments meets relevant criterion and user's requirement.
But test platform major part is in the market dedicated testing platform, namely only a certain series products is tested (as photovoltaic battery array battery analog power), if to number of different types product test, then multiple stage dedicated testing platform need be needed.This can increase testing of equipment cost undoubtedly.
The shortcoming of prior art:
At present, analog DC power supply general both at home and abroad, is generally special equipment, namely can only simulate single chemical energy battery or solar panel array, and these power-supply device capacity are less, and the market price is higher.Along with the development of energy storage technology, the battery of increasing high-energy-density obtains application in the industry, make the power demand of DC conversion equipment more larger, this just requires that the power of the test platform testing these convertor equipments is also increasing, voltage is more and more higher, and some high-power photovoltaic inverters need two-way (or multichannel) independently DC simulation power supply, simulate two (or many) independently photovoltaic array voltage-current curve.In addition the electric pressure variation of common DC suppling equipment, makes test platform be difficult to meet these requirements simultaneously.Such as photovoltaic DC-to-AC converter has 1kV and 1.5kV two kinds of DC voltage level, and metro traction inverter has 750V and 1500V two kinds of DC voltage level, and the electric pressure each department of double source trolley bus are all not identical (Beijing adopts 600V).
Summary of the invention
The object of the present invention is to provide a kind of DC simulation power supply for convertor equipment field tests, with solving, current DC equipment testing cost is high, and capacity is little not easily to be expanded, the problem such as electric pressure and function singleness, to meet more testing requirement.
The present invention specifically adopts following technical scheme:
A kind of great power bidirectional multi-channel DC analog power, it is characterized in that being made up of at least two mutually isolated analog DC power subsystems, each analog DC power subsystem comprises an AC/DC converter and a DC/DC converter of series connection mutually, the input of each AC/DC converter connects one limit winding of input transformer respectively, an input electric capacity in parallel respectively of each DC/DC converter, output head anode is connected a diode respectively, and each diode two ends are a switch in parallel respectively.
Preferably, described DC/DC converter is made up of the two-way DC/DC converter of two-phase or multiphase crisscross parallel Buck type.
Further preferably, described DC/DC converter comprises LCL type filter circuit, and its prime inductance adopts magnetic coupling inductance in parallel to export.
The present invention has following beneficial effect:
1. functional diversities of the present invention, only need adopt different control strategies according to practical application, does not need to change hardware, just can extended function.First can use (as simulation photovoltaic battery array volt-ampere characteristic and NaS battery, electrokinetic cell and super capacitor charging and discharging curve) as simulation chemical energy or photovoltaic cell power-supply system; Second charging/discharging apparatus that can be used as rechargeable type chemical energy battery (lithium battery, nickel-cadmium cell, Ni-MH battery) uses; 3rd analog machine that can be used as direct current network (such as subway direct current network, double source electric vehicle DC electrical network), the 4th can be used as DC electronic fictitious load uses.
2. the present invention uses by adopting the connection in series-parallel between isolation DC power subsystem, expand capacity and electric pressure, by the problem that simple way solves the electric pressure diversification of demand, capacity maximizes, wherein Multiple isolated outputs, every road exports and adopts the standardized power subsystem composition of same structure, realizes isolation, can go here and there between multiple-channel output, can be also by input transformer time limit winding, also independently can use, be easy to the expansion realizing analog power capacity and voltage.
3. two-way direct current export with the use of time, a road simulation normal voltage, another road simulation interference voltage, can test direct current input equipment in most closing to reality situation, or different current/voltage (or photovoltaic array) curves is simulated on every road.
4. the front end of each power subsystem adopts PWM controlled rectifier, is convenient to the two-way flow realizing power, stablizes the DC input voitage of rear end DC/DC, greatly reduces the current harmonics exchanging input, improves power factor (PF).
5. the rear end DC/DC converter of each power subsystem adopts two-way or multichannel two-way small-power DC/DC module by magnetic-coupled LCL filter inductance Parallel opertation, the decoupling zero magnetic achieving DC inductance is integrated integrated with coupling magnetic that is AC inductance, under the condition that each IGBT switching frequency is constant, improve equivalent switching frequency, greatly reduce current ripples and the noise of output.
6. multiphase interleaving Technology application can reduce output ripple, thus reduces the size of output filter, reduces the current stress of power device, easily introduces some outstanding control methods, to improve transducer effciency.
7. series diode and with diode and the by-pass switch connect on the output head anode of each power subsystem, series diode can prevent the positive and negative termination of circuit anti-on the one hand, damages equipment under test; Be that tested equipment needs anti-inverse time on the other hand, power reverse flow can be prevented; When not needing counnter attack or required power two-way flow, by-pass switch is closed.
Accompanying drawing explanation
Fig. 1 is two-way high power DC analog power structure chart.
Fig. 2 is multi-path large power DC simulation power supply architecture figure.
Fig. 3 is three-phase PWM rectification module topology diagram.
Fig. 4 is the two-way DC/DC converter of two-phase crisscross parallel Buck type.
Fig. 5 is two-way coupling induction structure schematic diagram.
Fig. 6 is the two-way DC/DC converter of multiphase interleaving Buck type.
DC power supply terminal connection scheme figure when Fig. 7 is two-way output.
Embodiment
Below in conjunction with specific embodiment, the present invention is further detailed.
Embodiment one
As shown in Figure 1, a kind of great power bidirectional two-way analog power, the analog DC power subsystem 3 identical by two line structures forms, and realizes isolation by the double winding on input transformer time limit.Each analog DC power subsystem 3 comprises an AC/DC converter 1 and a DC/DC converter 2 of series connection mutually.The input of each AC/DC converter 1 connects one limit winding of input transformer respectively, and AC/DC converter 1 is made up of three-phase PWM controllable rectifier module, and its topological structure as shown in Figure 3.The input of each DC/DC converter 2 is an electric capacity in parallel respectively, and output head anode is connected a diode respectively, and each diode two ends are a by-pass switch in parallel respectively.DC/DC converter 2 is made up of the two-way DC/DC converter of crisscross parallel Buck type.The output of each DC/DC converter is connected to a mode of connection selected cell, mode of connection selected cell utilizes different switches to connect and realizes the independent, in parallel of each DC/DC converter output terminal or series connection output (as DC power output end connection scheme figure when Fig. 7 is two-way output), and the direct current that mode of connection selected cell exports is for providing the DC power supply of equipment under test.
The topological structure of the two-way DC/DC converter of two-phase crisscross parallel Buck type as shown in Figure 4.As can be seen from Figure 4, the two-way DC/DC converter of two-phase crisscross parallel Buck type is composed in parallel by two-way small-power Buck converter, this converter adopts LCL filter structure, and prime inductance selects is coupling inductance, inductance main in topological structure is concentrated in together, realize with a magnetic device, two-way coupling induction structure figure as shown in Figure 5, thus improves the power density of this power module.Utilize the magnetic circuit principle of equal effects, then easily show that the magnetic flux of under equal conditions two-way coupling inductance and the flux value of single-phase inductance are identical.Therefore known overall magnetic flux density be less than discrete magnetic cell magnetic flux density and, to reduce volume and the quality of magnetic element.The current sharing inductor of parallel branch can be improved simultaneously, make parallel branch current sharing better.The Main Function of DC/DC module is exactly the electric pressure of coupling input and output side, makes the level and smooth continuously adjustabe of output voltage.If load demand power strengthens further, then can adopt Multiphase Parallel structure, its topological structure as shown in Figure 6.
For two-way output, the output connected mode of DC power supply of the present invention, can adjust according to actual testing requirement, both can isolate independent output, also can use by series and parallel, as shown in Figure 7.Electric pressure can be improved on the one hand when series connection uses; The operating state that two-way can be made to export on the other hand is different, and namely normal output is done on a road, and another road is done interference and exported, thus can simulate under different exceptional condition (as surge, transient state etc.), the operating state of tested equipment, to reduce the possibility of equipment depot repair.Series diode and with diode and the by-pass switch connect on output head anode, series diode can prevent the positive and negative termination of circuit anti-on the one hand, damages equipment under test; Be that tested equipment needs anti-inverse time on the other hand, power reverse flow can be prevented; When not needing counnter attack or required power two-way flow, by-pass switch is closed.
Embodiment two
A kind of great power bidirectional multichannel (three tunnels and three tunnels more than) analog power, the analog DC power subsystem identical by multichannel structure forms, and realizes isolation by the Multiple coil on input transformer time limit.Each analog DC power subsystem structure and the way of output thereof are with embodiment one.
DC simulation power supply of the present invention roughly can be operated in two kinds of operating states: inverter test mode, DC power supply device test mode.When this power supply is tested as contravariant equipment, use need be cooperated with AC analogue power supply.The connected mode of two outputs can be determined by the voltage and current grade of tested inverter apparatus; When working in DC power supply device performance test, connected mode and the control strategy of DC output end can be selected according to the power of tested power-supply device and performance requirement, to improve outfit of equipment utilance.
Claims (6)
1. a great power bidirectional multi-channel DC analog power, it is characterized in that being made up of at least two mutually isolated analog DC power subsystems, each analog DC power subsystem comprises an AC/DC converter and a DC/DC converter of series connection mutually, the input of each AC/DC converter connects one limit winding of input transformer respectively, an input electric capacity in parallel respectively of each DC/DC converter, output head anode is connected a diode respectively, and each diode two ends are a switch in parallel respectively.
2. great power bidirectional multi-channel DC analog power as claimed in claim 1, is characterized in that described AC/DC converter is made up of three-phase PWM controllable rectifier module.
3. great power bidirectional multi-channel DC analog power as claimed in claim 1, is characterized in that described DC/DC converter is made up of the two-way DC/DC converter of two-phase or multiphase crisscross parallel Buck type.
4. great power bidirectional multi-channel DC analog power as claimed in claim 3, is characterized in that described DC/DC converter comprises LCL type filter circuit, and its prime inductance adopts magnetic coupling inductance in parallel to export.
5. great power bidirectional multi-channel DC analog power as claimed in claim 1, is characterized in that independent, the in parallel or series connection of the output of each DC/DC converter exports.
6. great power bidirectional multi-channel DC analog power as claimed in claim 1, is characterized in that being made up of two described analog DC power subsystems, and a simulation normal voltage, another simulates interference voltage.
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| CN105119334A (en) * | 2015-08-31 | 2015-12-02 | 深圳驿普乐氏科技有限公司 | Voltage transformation circuit with wide voltage output range and DC charging pile |
| CN105197023A (en) * | 2015-10-15 | 2015-12-30 | 珠海格力电器股份有限公司 | Train power supply system, train air conditioning system using train power supply system and control method of train air conditioning system |
| CN105301404A (en) * | 2015-11-16 | 2016-02-03 | 国家电网公司 | Solar cell simulator used for photovoltaic grid-connected inverter detection |
| CN105391321A (en) * | 2015-12-16 | 2016-03-09 | 中国科学院上海应用物理研究所 | Ultra-large current source |
| CN105471298A (en) * | 2015-12-22 | 2016-04-06 | 深圳茂硕电气有限公司 | Multilevel inverter |
| CN107800300A (en) * | 2017-09-26 | 2018-03-13 | 钛白金科技（深圳）有限公司 | Multiphase staggered bi-directional DC converter |
| CN108292844A (en) * | 2015-11-19 | 2018-07-17 | Abb瑞士股份有限公司 | Use the converter device of current changer module |
| CN108649664A (en) * | 2018-07-07 | 2018-10-12 | 深圳驿普乐氏科技有限公司 | A kind of DC power supply and series-parallel circuit |
| CN109307842A (en) * | 2018-10-17 | 2019-02-05 | 湖南恩智测控技术有限公司 | A kind of analog power that circuit is realized |
| CN109474189A (en) * | 2017-09-08 | 2019-03-15 | 株洲中车时代电气股份有限公司 | A kind of high-power DC power supply |
| CN109617406A (en) * | 2018-12-19 | 2019-04-12 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of coupling multiphase DC-DC converter |
| CN109947001A (en) * | 2019-03-13 | 2019-06-28 | 北京宇航系统工程研究所 | A kind of electromagnetic valve energy-saving control circuit |
| CN110168897A (en) * | 2016-12-12 | 2019-08-23 | 李斯特内燃机及测试设备公司 | For testing the device of electrical energy storage system |
| WO2020010729A1 (en) * | 2018-07-07 | 2020-01-16 | 深圳驿普乐氏科技有限公司 | Direct-current power supply and series and parallel circuit |
| CN111032423A (en) * | 2017-07-10 | 2020-04-17 | Abb瑞士股份有限公司 | Variable power charging |
| CN113581223A (en) * | 2021-08-17 | 2021-11-02 | 中车株洲电力机车有限公司 | Hybrid power locomotive and energy balance control method and system thereof |
| CN113746191A (en) * | 2021-09-24 | 2021-12-03 | 中国北方车辆研究所 | Method for constructing direct current +/-28V power supply by adopting permanent magnet motor |
| CN118137833A (en) * | 2024-03-07 | 2024-06-04 | 上海鲲悟丰电科技有限公司 | Direct current conversion system, bidirectional DC/DC converter and conversion method |
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| CN105119334A (en) * | 2015-08-31 | 2015-12-02 | 深圳驿普乐氏科技有限公司 | Voltage transformation circuit with wide voltage output range and DC charging pile |
| CN105197023A (en) * | 2015-10-15 | 2015-12-30 | 珠海格力电器股份有限公司 | Train power supply system, train air conditioning system using train power supply system and control method of train air conditioning system |
| CN105197023B (en) * | 2015-10-15 | 2018-06-22 | 珠海格力电器股份有限公司 | Control method of train air conditioner |
| CN105301404A (en) * | 2015-11-16 | 2016-02-03 | 国家电网公司 | Solar cell simulator used for photovoltaic grid-connected inverter detection |
| CN108292844A (en) * | 2015-11-19 | 2018-07-17 | Abb瑞士股份有限公司 | Use the converter device of current changer module |
| CN108292844B (en) * | 2015-11-19 | 2021-07-16 | Abb电网瑞士股份公司 | Inverter device using inverter module |
| CN105391321A (en) * | 2015-12-16 | 2016-03-09 | 中国科学院上海应用物理研究所 | Ultra-large current source |
| CN105471298B (en) * | 2015-12-22 | 2019-04-23 | 深圳茂硕电气有限公司 | A kind of multi-electrical level inverter |
| CN105471298A (en) * | 2015-12-22 | 2016-04-06 | 深圳茂硕电气有限公司 | Multilevel inverter |
| CN110168897A (en) * | 2016-12-12 | 2019-08-23 | 李斯特内燃机及测试设备公司 | For testing the device of electrical energy storage system |
| CN111032423A (en) * | 2017-07-10 | 2020-04-17 | Abb瑞士股份有限公司 | Variable power charging |
| CN109474189A (en) * | 2017-09-08 | 2019-03-15 | 株洲中车时代电气股份有限公司 | A kind of high-power DC power supply |
| CN107800300A (en) * | 2017-09-26 | 2018-03-13 | 钛白金科技（深圳）有限公司 | Multiphase staggered bi-directional DC converter |
| WO2020010729A1 (en) * | 2018-07-07 | 2020-01-16 | 深圳驿普乐氏科技有限公司 | Direct-current power supply and series and parallel circuit |
| CN108649664A (en) * | 2018-07-07 | 2018-10-12 | 深圳驿普乐氏科技有限公司 | A kind of DC power supply and series-parallel circuit |
| CN109307842A (en) * | 2018-10-17 | 2019-02-05 | 湖南恩智测控技术有限公司 | A kind of analog power that circuit is realized |
| CN109307842B (en) * | 2018-10-17 | 2024-04-12 | 湖南恩智测控技术有限公司 | Analog power supply for circuit realization |
| CN109617406A (en) * | 2018-12-19 | 2019-04-12 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of coupling multiphase DC-DC converter |
| CN109947001A (en) * | 2019-03-13 | 2019-06-28 | 北京宇航系统工程研究所 | A kind of electromagnetic valve energy-saving control circuit |
| CN113581223A (en) * | 2021-08-17 | 2021-11-02 | 中车株洲电力机车有限公司 | Hybrid power locomotive and energy balance control method and system thereof |
| CN113581223B (en) * | 2021-08-17 | 2022-07-19 | 中车株洲电力机车有限公司 | Hybrid power locomotive and energy balance control method and system thereof |
| CN113746191A (en) * | 2021-09-24 | 2021-12-03 | 中国北方车辆研究所 | Method for constructing direct current +/-28V power supply by adopting permanent magnet motor |
| CN118137833A (en) * | 2024-03-07 | 2024-06-04 | 上海鲲悟丰电科技有限公司 | Direct current conversion system, bidirectional DC/DC converter and conversion method |
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Inventor after: Wu Yibing Inventor after: Zhou Xiwen Inventor after: Zhang Hui Inventor after: Liu Tao Inventor after: Tan Haonan Inventor after: Ma Huafeng Inventor before: Zhou Xiwen Inventor before: Zhang Hui Inventor before: Liu Tao Inventor before: Tan Haonan Inventor before: Ma Huafeng |
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Application publication date: 20150826 |