CN204993091U - High -power two -way multichannel direct current analog power supply - Google Patents
High -power two -way multichannel direct current analog power supply Download PDFInfo
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- CN204993091U CN204993091U CN201520406617.3U CN201520406617U CN204993091U CN 204993091 U CN204993091 U CN 204993091U CN 201520406617 U CN201520406617 U CN 201520406617U CN 204993091 U CN204993091 U CN 204993091U
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Abstract
The utility model discloses a high -power two -way multichannel direct current analog power supply, its characterized in that comprises the simulation DC power supply unit of two at least mutual isolations, and each simulates the DC power supply unit including a ACDC converter and a DCDC converter of each other establishing ties, and input transformer's a secondery side winding is connected respectively to the input of each ACDC converter, and the input of each DCDC converter is parallelly connected electric capacity respectively, the output end positive electrode diode of establishing ties respectively, and each diode both ends is parallelly connected switch respectively. The utility model discloses the function is diversified, only needs to adopt different control strategy, need not change hardware, just can expand the function. The problem of present direct current equipment test cost high, the little difficult expansion of capacity, electric pressure and function singleness etc is solved.
Description
Technical field
The utility model belongs to convertor equipment technical field of measurement and test, is 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 purpose of this utility model is to provide a kind of DC simulation power supply for convertor equipment field tests, and 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 utility model 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 utility model has following beneficial effect:
1. the utility model functional diversities, 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 utility model 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.
Fig. 7 (a) is two-way DC power supply terminal connection scheme figure when independently exporting.
DC power supply terminal connection scheme figure when Fig. 7 (b) is two-way Parallel opertation.
DC power supply terminal connection scheme figure when Fig. 7 (c) is two-way series connection output.
Embodiment
Below in conjunction with specific embodiment, the utility model 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 (a)-Fig. 7 (c) 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 the utility model DC power supply, can adjust according to actual testing requirement, both can isolate independent output, also can use, as shown in Fig. 7 (a)-Fig. 7 (b) by series and parallel.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.
The utility model DC simulation power supply 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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| CN201520406617.3U CN204993091U (en) | 2015-06-12 | 2015-06-12 | High -power two -way multichannel direct current analog power supply |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868755A (en) * | 2015-06-12 | 2015-08-26 | 江苏同芯电气科技有限公司 | High-power bidirectional multi-way direct-current simulation power supply |
| CN105871244A (en) * | 2016-05-06 | 2016-08-17 | 钛白金科技（深圳）有限公司 | Single-phase AC-DC/DC-AC dual-purpose circuit and three-phase AC-DC/DC-AC dual-purpose circuit |
| CN108039763A (en) * | 2017-12-29 | 2018-05-15 | 上海瑞伯德智能系统股份有限公司 | A kind of high power DC charging circuit |
| CN110492748A (en) * | 2019-06-24 | 2019-11-22 | 华北电力大学 | A kind of reciprocating isolated form DC/DC converter topology of output based on DAB |
-
2015
- 2015-06-12 CN CN201520406617.3U patent/CN204993091U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868755A (en) * | 2015-06-12 | 2015-08-26 | 江苏同芯电气科技有限公司 | High-power bidirectional multi-way direct-current simulation power supply |
| CN105871244A (en) * | 2016-05-06 | 2016-08-17 | 钛白金科技（深圳）有限公司 | Single-phase AC-DC/DC-AC dual-purpose circuit and three-phase AC-DC/DC-AC dual-purpose circuit |
| CN108039763A (en) * | 2017-12-29 | 2018-05-15 | 上海瑞伯德智能系统股份有限公司 | A kind of high power DC charging circuit |
| CN110492748A (en) * | 2019-06-24 | 2019-11-22 | 华北电力大学 | A kind of reciprocating isolated form DC/DC converter topology of output based on DAB |
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