CN209311592U - A kind of high pressure direct screening energy accumulation current converter modular testing platform and test circuit - Google Patents
A kind of high pressure direct screening energy accumulation current converter modular testing platform and test circuit Download PDFInfo
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- CN209311592U CN209311592U CN201821822752.6U CN201821822752U CN209311592U CN 209311592 U CN209311592 U CN 209311592U CN 201821822752 U CN201821822752 U CN 201821822752U CN 209311592 U CN209311592 U CN 209311592U
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Abstract
The utility model discloses a kind of high pressure direct screening energy accumulation current converter modular testing platform and test circuits, it selects to switch by three-phase, two-winding transformer, four winding transformers, three-phase converter system and high pressure direct screening energy accumulation current converter head and the tail are successively serially connected circlewise, the primary side of two-winding transformer is connected with power grid, its mesohigh direct screening energy accumulation current converter includes abc three phase power converter unit chain and three-phase grid reactor, every phase power conversion unit chain includes the power conversion unit chain link that the exchange side of equivalent amount is successively serially connected, the input terminal of every phase power conversion unit chain is connected with three-phase grid reactor, the output end of every phase power conversion unit chain homogeneously connects, wherein each power conversion unit chain link is in series by isolated form DC/DC unit and H-bridge unit.The utility model realizes the energy feedback low-power consumption of high pressure direct screening energy accumulation current converter, battery simulation low cost, the purpose of multi-voltage grade high efficiency test.
Description
Technical field
The utility model relates to a kind of high pressure direct screening energy accumulation current converter modular testing platform and test circuits, belong to big function
Rate power electronics field.
Background technique
Currently, by national grid Zhangbei County wind-light storage transmission demonstration project energy-accumulating power station and south electric network Shenzhen Baoqing energy-accumulating power station
Two most representative extensive battery energy storage system case histories are visible: China's high power battery energy storage project generally uses
Distributed low pressure energy storage technology route, by numerous middle low power energy accumulation current converters (general single machine maximum power is 0.5MW at present)
Boosting access power grid, pain spot are step by step after confluence is surveyed in exchange: system cable route and communication line are long, ancillary equipment
It is more, it takes up a large area；Circulation caused by more low pressure energy accumulation current converter parallel connections increases system active loss；By numerous
Reactive loss brought by transformer boosting is larger, reduces running efficiency of system；Multi-controller coordinated control, control system are multiple
Miscellaneous, difficult coordination, response speed are slow；The optional equipments such as reactive compensation need to be configured, energy-accumulating power station construction cost is increased.Therefore,
Existing low pressure energy storage technology route does not adapt to the construction demand of the following extensive energy-accumulating power station, needs technical breakthrough and wound
Newly.
Chinese invention patent " a kind of combined bidirectional DC/AC converter topologies " (publication number CN103178742A) mentions
The topology for the combination tandem type bidirectional converter that a kind of " isolated form half-bridge DC/DC " is combined with " H bridge tandem type DC/AC " is gone out
Structure；Chinese invention patent " the combination tandem type energy accumulation current converter structure of the DC/DC containing full-bridge " (publication number CN105871238A)
Propose a kind of " isolated form full-bridge DC/DC " opening up with " H bridge tandem type DC/AC " the combination tandem type bidirectional converter combined
Structure is flutterred, for such high pressure direct screening energy accumulation current converter combined based on " isolated form DC/DC " with " H bridge tandem type DC/AC "
Since 10/35kV power grid can be directly accessed without step-up transformer, cost is saved, efficiency is improved, simultaneously because H bridge
Multi-stage cascade capacity is big, the construction demand particularly suitable for extensive energy-accumulating power station.
But since high pressure direct screening energy accumulation current converter is made of H bridge multi-stage cascade, cascade H-bridge unit quantity is many
It is more, if H-bridge unit quantity needs 36 with regard in 10kV high pressure direct screening energy accumulation current converter, each unit how is quickly carried out until whole
The test of a energy accumulation current converter, saving the electricity charge consumed in test process becomes one of difficult point；Meanwhile for energy accumulation current converter
For charge-discharge test, generally requires and give test platform configuration energy-storage battery, and energy-storage battery higher cost, this gives energy storage unsteady flow
The building of device test platform brings huge cost pressure, becomes the two of difficult point.
Therefore, it needs to provide for high pressure direct screening energy accumulation current converter a kind of quick with low-power consumption, low battery cost, high efficiency
The test platform of power of test.
Utility model content
Purpose: in order to overcome the deficiencies in the prior art, the utility model provides a kind of high pressure direct screening energy storage unsteady flow
Device modular testing platform and test circuit realize that the energy feedback low-power consumption of high pressure direct screening energy accumulation current converter, battery simulation are low
Cost, the purpose of multi-voltage grade high efficiency test.
Technical solution: in order to solve the above technical problems, the technical solution adopted by the utility model is:
A kind of high pressure direct screening energy accumulation current converter modular testing platform, comprising: three-phase selection switch, two-winding transformer
T1, four winding transformer T2, three-phase converter system, the three-phase selection are switched including contact 1, contact 2, contact 3 three each other
Independent input terminal and 1 output end, contact 1 are connected with the secondary side three-phase tap 1 of two-winding transformer T1, contact 2 and double wrap
The secondary side three-phase tap 2 of group transformer T1 is connected, and contact 3 is connected with the secondary side three-phase tap 3 of two-winding transformer T1；Described four
Winding transformer T2 includes that primary side winding and secondary three-phase windings B, pair side three-phase windings C, four windings in three-phase windings A, pair become
The primary side of depressor T2 is connected with the primary side of two-winding transformer T1；The three-phase converter system includes 3 three-phases independent of each other
Current transformer A, 3-phase power converter B and 3-phase power converter C, the three-phase alternating current input terminal of 3-phase power converter A and four winding transformer T2
Secondary side three-phase windings A be connected, the secondary side three-phase windings of the three-phase alternating current input terminal of 3-phase power converter B and four winding transformer T2
B is connected, and the three-phase alternating current input terminal of 3-phase power converter C is connected with the secondary side three-phase windings C of four winding transformer T2.
Preferably, the primary side line voltage of the two-winding transformer T1 is 400V, the line electricity of secondary side three-phase tap 1
Pressure is 690V, and the line voltage of secondary side three-phase tap 2 is 2.5kV, and the line voltage of secondary side three-phase tap 3 is 10kV, four winding transformations
The secondary three-phase windings B and pair side three-phase windings C in three-phase windings A, pair of device T2 is 400V.
A kind of high pressure direct screening energy accumulation current converter modular testing circuit, it is characterised in that: three-phase selection switch, double winding become
Depressor T1, four winding transformer T2, three-phase converter system and high pressure direct screening energy accumulation current converter head and the tail are successively serially connected circlewise,
The primary side of two-winding transformer is connected with power grid；
The three-phase selection switch includes contact 1, contact 2, the input terminal independent of each other of contact 3 three and 1 output end,
Contact 1 is connected with the secondary side three-phase tap 1 of two-winding transformer T1, the secondary side three-phase tap 2 of contact 2 and two-winding transformer T1
It is connected, contact 3 is connected with the secondary side three-phase tap 3 of two-winding transformer T1；
The four winding transformers T2 includes primary side winding and secondary three-phase windings B, secondary side three-phase in three-phase windings A, pair
Winding C, the primary side of four winding transformer T2 are connected with the primary side of two-winding transformer T1；
The three-phase converter system includes 3 3-phase power converter A, 3-phase power converter B and 3-phase power converters independent of each other
The three-phase alternating current input terminal of C, 3-phase power converter A are connected with the secondary side three-phase windings A of four winding transformer T2,3-phase power converter B
Three-phase alternating current input terminal be connected with the secondary side three-phase windings B of four winding transformer T2, the input of the three-phase alternating current of 3-phase power converter C
End is connected with the secondary side three-phase windings C of four winding transformer T2；
The a phase direct-flow input end of high pressure direct screening energy accumulation current converter is connected with the DC output end of 3-phase power converter A, high straightening
The b phase direct-flow input end for hanging energy accumulation current converter is connected with the DC output end of 3-phase power converter B, high pressure direct screening energy accumulation current converter
C phase direct-flow input end is connected with the DC output end of 3-phase power converter C, the exchange side input terminal of high pressure direct screening energy accumulation current converter with
The three-phase output end of three-phase selection switch is connected.
Preferably, the primary side line voltage of the two-winding transformer T1 is 400V, the line electricity of secondary side three-phase tap 1
Pressure is 690V, and the line voltage of secondary side three-phase tap 2 is 2.5kV, and the line voltage of secondary side three-phase tap 3 is 10kV, four winding transformations
The secondary three-phase windings B and pair side three-phase windings C in three-phase windings A, pair of device T2 is 400V.
Preferably, the high pressure direct screening energy accumulation current converter is by a phase power conversion unit chain, b phase power conversion list
First chain, c phase power conversion unit chain and three-phase grid reactor are in series, and the every phase power conversion unit chain of a, b, c includes
The power conversion unit chain link of equivalent amount；
The a phase power conversion unit chain includes multiple power conversion unit chain links, multiple power conversion unit chain links
The input of exchange side, output port are successively serially connected；The DC side input anode of multiple power conversion unit chain links, cathode point
After parallel with one another, a phase direct-flow input end as the high pressure direct screening energy accumulation current converter direct current output with 3-phase power converter A respectively
Rectify pole, cathode is connected；
The b phase power conversion unit chain includes multiple power conversion unit chain links, multiple power conversion unit chain links
The input of exchange side, output port are successively serially connected；The DC side input anode of multiple power conversion unit chain links, cathode point
After parallel with one another, b phase direct-flow input end as the high pressure direct screening energy accumulation current converter direct current output with 3-phase power converter B respectively
Proper pole, cathode are connected,
The c phase power conversion unit chain includes multiple power conversion unit chain links, multiple power conversion unit chain links
The input of exchange side, output port are successively serially connected；The DC side input anode of multiple power conversion unit chain links, cathode point
After parallel with one another, c phase direct-flow input end as the high pressure direct screening energy accumulation current converter direct current output with 3-phase power converter C respectively
Rectify pole, cathode is connected；
The last one power conversion unit chain link of a phase exchanges the last one power conversion unit chain link of side output end and b phase
Exchange side output end exchanges side output end with c phase the last one power conversion unit chain link and homogeneously connects；
First power conversion unit chain link exchange side input terminal of a phase is defeated with a phase reactance La's of three-phase grid reactor
Outlet is connected, and first power conversion unit chain link exchange side input terminal of b phase is defeated with the b phase reactance Lb's of three-phase grid reactor
Outlet is connected, and first power conversion unit chain link exchange side input terminal of c phase is defeated with the c phase reactance Lc's of three-phase grid reactor
Outlet is connected；
The input terminal of a phase reactance La of three-phase grid reactor, the b phase reactance Lb of three-phase grid reactor input terminal,
Exchange side input terminal and three of the input terminal of the c phase reactance Lc of three-phase grid reactor collectively as high pressure direct screening energy accumulation current converter
Mutually the three-phase output end of selection switch is connected.
Preferably, the 3-phase power converter A of the three-phase converter system, 3-phase power converter B and 3-phase power converter C are complete
It is exactly the same, using three phase full bridge current transformer, the three phase full bridge current transformer include 6 same models power device switch K1,
K2, K3, K4, K5, K6, a phase ac input end as three phase full bridge current transformer after the input terminal of K1 is connected with the output end of K2,
B phase ac input end as three phase full bridge current transformer after the input terminal of K3 is connected with the output end of K4, the input terminal and K6 of K5
Output end be connected after c phase ac input end as three phase full bridge current transformer, the output end of K1, the output end of K3 and K5 it is defeated
Outlet be connected after as three phase full bridge current transformer DC output end anode, the input terminal of K2, the input terminal of K4 and K6 it is defeated
Enter the cathode after end is connected as the DC output end of three phase full bridge current transformer.
Preferably, the power conversion unit chain link includes: isolated form DC/DC unit and H-bridge unit series connection, institute
It states isolated form DC/DC unit and is preferably isolated type full-bridge DC/DC unit, including capacitor C1, capacitor C2,8 power device switches
S1, S2, S3, S4, S5, S6, S7, S8, high-frequency isolation transformer T, S1 input terminal be connected with S2 output end after again with high-frequency isolation
The input terminal 1 of transformer T is connected, S3 input terminal be connected with S4 output end after again with the input terminal 2 of high-frequency isolation transformer T
It is connected, direct current as power conversion unit chain link after the output end of S1 is connected with the output end of S3, capacitor C1 positive terminal
Side anode, the input terminal of S2 be connected with the input terminal of S4, capacitor C1 negative terminal after as the straight of power conversion unit chain link
Side cathode is flowed, S5 input terminal is connected with the output terminal 3 of high-frequency isolation transformer T again after being connected with S6 output end, S7 input terminal
Output terminal 4 after being connected with S8 output end again with high-frequency isolation transformer T is connected, the output end of S5 and output end, the electricity of S7
Hold and is used as isolated form DC/DC unit DC output side anode in power conversion unit chain link after C2 positive terminal is connected, S6's
Input terminal is mono- as isolated form DC/DC in power conversion unit chain link after being connected with the input terminal of S8, capacitor C2 negative terminal
First DC output side cathode；
The H-bridge unit includes 4 power device switches S9, S10, S11, S12, and S9 input terminal is connected with S10 output end
Afterwards as the exchange side input terminal of power conversion unit chain link, S11 input terminal is used as power conversion list after being connected with S12 output end
The exchange side output end of first chain link, the output end of S9 and output end, the isolated form DC/DC unit DC output side anode of S11 are equal
It is connected, the input terminal of S10 is connected with the input terminal of S12, isolated form DC/DC unit DC output side cathode.
The utility model has the advantages that a kind of high pressure direct screening energy accumulation current converter modular testing platform provided by the utility model and test electricity
Road, advantage are as follows:
1) energy feedback low-power consumption: due to a kind of high pressure direct screening energy accumulation current converter modular testing platform of the utility model by
Three-phase select switch, two-winding transformer, four winding transformers, three-phase converter system and high pressure direct screening energy accumulation current converter from beginning to end according to
Secondary to be serially connected circlewise, the primary side of two-winding transformer is connected with power grid, by controlling the inversion of three-phase converter system or whole
The charge or discharge operating condition of the true energy storage battery system of flow field simulation, the charge and discharge for carrying out each module of high pressure direct screening energy accumulation current converter are electrical
It can test, there is energy feedback performance, such as when the work of three-phase converter system is in rectification mode, from two-winding transformer absorption electricity
The electric energy of net is through four winding transformers, by after the rectification of three-phase converter system and high pressure direct screening energy accumulation current converter inversion and through three-phase
Selection switch, two-winding transformer have fed back to power grid；When the work of three-phase converter system is in inverter mode, from double winding transformation
Device absorbs the electric energy of power grid after three-phase selection switch, by the rectification of high pressure direct screening energy accumulation current converter and three-phase converter system inversion
Power grid is fed back to through four winding transformers again, the electric energy loss of entire test platform is only oneself of each component of test platform itself
Power consumption greatly reduces power consumption of the test platform in entire test process, saves the electricity charge.
2) battery simulation low cost: the utility model passes through power conversion unit chain link a1, power conversion unit chain link
After the DC side of a2 ... power conversion unit chain link aN is parallel with one another, a phase direct current as high pressure direct screening energy accumulation current converter is defeated
Enter end to be connected with the DC output end of 3-phase power converter A, power conversion unit chain link b1, power conversion unit chain link b2 ... function
B phase direct-flow input end and three after the DC side of rate converter unit chain link bN is parallel with one another, as high pressure direct screening energy accumulation current converter
The DC output end of phase current transformer B is connected, power conversion unit chain link c1, power conversion unit chain link c2 ... power conversion list
C phase direct-flow input end and 3-phase power converter C after the DC side of first chain link cN is parallel with one another, as high pressure direct screening energy accumulation current converter
DC output end be connected, realize only by control three identical low costs 3-phase power converter A, 3-phase power converter
B, the inversion or rectification of 3-phase power converter C is the charge or discharge operating condition of the true energy storage battery system of analog, carries out high straightening
The charge-discharge performance test for hanging each module in energy accumulation current converter, saves the input cost of true energy-storage battery.
3) multi-voltage grade high efficiency: the utility model is using tri- voltage class gear difference of 690V, 2.5kV, 10kV
The charge-discharge performance of three-phase single strand module, four chain module of three-phase, 12 chain module of three-phase in testing high voltage direct screening energy accumulation current converter,
Specifically when phase power conversion unit chain every in high pressure direct screening energy accumulation current converter includes 1 power conversion unit chain link, three-phase
Selection switch selection 690V ac bus simulates true energy storage battery system by the inversion or rectification that control three-phase converter system
Charge or discharge operating condition, carry out high pressure direct screening energy accumulation current converter in three-phase single strand module charge-discharge performance test；Work as high pressure
When every phase power conversion unit chain includes 4 power conversion unit chain links in direct screening energy accumulation current converter, three-phase selection switch choosing
Select 2.5kV ac bus, by the inversion or rectification that control three-phase converter system simulate true energy storage battery system charging or
Electric discharge operating condition carries out the charge-discharge performance test of four chain module of three-phase in high pressure direct screening energy accumulation current converter；When high pressure direct screening energy storage
When every phase power conversion unit chain includes 12 power conversion unit chain links in current transformer, three-phase selection switch selection 10kV is handed over
Bus is flowed, the charge or discharge operating condition of true energy storage battery system is simulated by the inversion or rectification that control three-phase converter system,
The charge-discharge performance test for carrying out 12 chain module of three-phase in high pressure direct screening energy accumulation current converter, so passes through building blocks under multi-voltage grade
The test for changing module improves testing efficiency.
Detailed description of the invention
Fig. 1 is the test circuit topological structure block diagram of the utility model；
Fig. 2 is the 3-phase power converter topology diagram of the utility model；
Fig. 3 is the power conversion unit chain link topology diagram of the utility model.
Specific embodiment
The utility model is further described with reference to the accompanying drawing.
A kind of high pressure direct screening energy accumulation current converter modular testing platform, comprising: three-phase selection switch, two-winding transformer
T1, four winding transformer T2, three-phase converter system, three-phase selection switch close include contact 1, contact 2, contact 3 three that
This independent input terminal and 1 output end, contact 1 are connected with the secondary side three-phase tap 1 of two-winding transformer T1, contact 2 and double
The secondary side three-phase tap 2 of winding transformer T1 is connected, and contact 3 is connected with the secondary side three-phase tap 3 of two-winding transformer T1；It is described
Four winding transformer T2 include primary side winding and secondary three-phase windings B, pair side three-phase windings C, four windings in three-phase windings A, pair
The primary side of transformer T2 is connected with the primary side of two-winding transformer T1；The three-phase converter system includes 3 independent of each other three
Phase current transformer A, 3-phase power converter B and 3-phase power converter C, the three-phase alternating current input terminal and four winding transformers of 3-phase power converter A
The secondary side three-phase windings A of T2 is connected, the secondary side three-phase of the three-phase alternating current input terminal of 3-phase power converter B and four winding transformer T2 around
Group B is connected, and the three-phase alternating current input terminal of 3-phase power converter C is connected with the secondary side three-phase windings C of four winding transformer T2.
When in use, the primary side of two-winding transformer T1 is connected with power grid for test platform, by test object high pressure direct screening
The direct-flow input end of energy accumulation current converter is connected with the output end of three-phase converter system；The exchange of high pressure direct screening energy accumulation current converter is defeated
Enter end to be connected with the three-phase output end of three-phase selection switch, completes the charge-discharge performance of each module of high pressure direct screening energy accumulation current converter
Test, simulates the charge or discharge operating condition of true energy storage battery system.
As shown in Figure 1, a kind of high pressure direct screening energy accumulation current converter modular testing circuit, by three-phase selection switch, double winding
Transformer T1, four winding transformer T2, three-phase converter system and high pressure direct screening energy accumulation current converter head and the tail are successively serially connected cyclization
The primary side of shape, two-winding transformer is connected with power grid；
Wherein, three-phase selection switch includes contact 1, contact 2, the input terminal independent of each other of contact 3 three and 1 output
End, contact 1 are connected with the secondary side three-phase tap 1 of two-winding transformer T1, and the secondary side three-phase of contact 2 and two-winding transformer T1 are taken out
First 2 are connected, and contact 3 is connected with the secondary side three-phase tap 3 of two-winding transformer T1；
Four winding transformer T2 include primary side winding and secondary three-phase windings B, secondary side three-phase windings in three-phase windings A, pair
The primary side of C, four winding transformer T2 are connected with the primary side of two-winding transformer T1；
Preferably, the primary side line voltage of two-winding transformer T1 is 400V, and the line voltage of secondary side three-phase tap 1 is 690V,
The line voltage of secondary side three-phase tap 2 is 2.5kV, and the line voltage of secondary side three-phase tap 3 is 10kV, the secondary side of four winding transformer T2
Three-phase windings A, the secondary three-phase windings C in three-phase windings B and pair are 400V；
Three-phase converter system includes 3 3-phase power converter A independent of each other, 3-phase power converter B and 3-phase power converter C, and three
The three-phase alternating current input terminal of phase current transformer A is connected with the secondary side three-phase windings A of four winding transformer T2, and the three of 3-phase power converter B
Phase ac input end is connected with the secondary side three-phase windings B of four winding transformer T2, the three-phase alternating current input terminal of 3-phase power converter C with
The secondary side three-phase windings C of four winding transformer T2 is connected；
The a phase direct-flow input end of high pressure direct screening energy accumulation current converter is connected with the DC output end of 3-phase power converter A, high straightening
The b phase direct-flow input end for hanging energy accumulation current converter is connected with the DC output end of 3-phase power converter B, high pressure direct screening energy accumulation current converter
C phase direct-flow input end is connected with the DC output end of 3-phase power converter C, the exchange side input terminal of high pressure direct screening energy accumulation current converter with
The three-phase output end of three-phase selection switch is connected.
The high pressure direct screening energy accumulation current converter is become by a phase power conversion unit chain, b phase power conversion unit chain c phase power
It changes cellular chain and three-phase grid reactor is in series, the every phase power conversion unit chain of a, b, c includes the power of equivalent amount
Converter unit chain link；
The a phase power conversion unit chain includes power conversion unit chain link a1, power conversion unit chain link a2 ... function
Rate converter unit chain link aN, N=3,4,5 ..., N take the integer more than or equal to 3, and power conversion unit chain link a1, power become
Change the exchange side input of unit chain link a2 ... power conversion unit chain link aN, output port is successively serially connected；Power conversion
Unit chain link a1, the DC side input anode of power conversion unit chain link a2 ... power conversion unit chain link aN, cathode point
After parallel with one another, a phase direct-flow input end as the high pressure direct screening energy accumulation current converter direct current output with 3-phase power converter A respectively
Proper pole, cathode are connected,
The b phase power conversion unit chain includes power conversion unit chain link b1, power conversion unit chain link b2 ... function
Rate converter unit chain link bN, N=3,4,5 ..., N take the integer more than or equal to 3, and power conversion unit chain link b1, power become
Change the exchange side input of unit chain link b2 ... power conversion unit chain link bN, output port is successively serially connected；Power conversion
Unit chain link b1, the DC side input anode of power conversion unit chain link b2 ... power conversion unit chain link bN, cathode point
After parallel with one another, b phase direct-flow input end as the high pressure direct screening energy accumulation current converter direct current output with 3-phase power converter B respectively
Proper pole, cathode are connected,
The c phase power conversion unit chain includes power conversion unit chain link c1, power conversion unit chain link c2 ... function
Rate converter unit chain link cN, N=3,4,5 ..., N take the integer more than or equal to 3, and power conversion unit chain link c1, power become
Change the exchange side input of unit chain link c2 ... power conversion unit chain link cN, output port is successively serially connected；Power conversion
Unit chain link c1, the DC side input anode of power conversion unit chain link c2 ... power conversion unit chain link cN, cathode point
After parallel with one another, c phase direct-flow input end as the high pressure direct screening energy accumulation current converter direct current output with 3-phase power converter C respectively
Rectify pole, cathode is connected.
Power conversion unit chain link aN exchange side output end and work as a phase power conversion unit chain exchange side output end
Side output end is exchanged for the power conversion unit chain link bN that b phase power conversion unit chain exchanges side output end, is become as c phase power
The power conversion unit chain link cN exchange side output end for changing cellular chain exchange side output end homogeneously connects；
Power conversion unit chain link a1 as a phase power conversion unit chain exchange side input terminal exchanges side input terminal and three
The output end of a phase reactance La of mutually grid-connected reactor is connected, and the power as b phase power conversion unit chain exchange side input terminal becomes
It changes unit chain link b1 exchange side input terminal to be connected with the output end of the b phase reactance Lb of three-phase grid reactor, become as c phase power
Change the c phase reactance of power conversion unit chain link c1 exchange the side input terminal and three-phase grid reactor of cellular chain exchange side input terminal
The output end of Lc is connected；
The input terminal of a phase reactance La of three-phase grid reactor, the b phase reactance Lb of three-phase grid reactor input terminal,
Exchange side input terminal and three of the input terminal of the c phase reactance Lc of three-phase grid reactor collectively as high pressure direct screening energy accumulation current converter
Mutually the three-phase output end of selection switch is connected.
As shown in Fig. 2, the 3-phase power converter A of the three-phase converter system, 3-phase power converter B and 3-phase power converter C are complete
Identical, topological structure is preferably three phase full bridge current transformer,
The three phase full bridge current transformer includes power device switch K1, K2, K3, K4, K5, K6 of 6 same models, K1's
A phase ac input end as three phase full bridge current transformer after input terminal is connected with the output end of K2, the input terminal of K3 and K4's is defeated
B phase ac input end after outlet is connected as three phase full bridge current transformer, conduct after the input terminal of K5 is connected with the output end of K6
The c phase ac input end of three phase full bridge current transformer, output end, the output end of K3 of K1 are used as three-phase after being connected with the output end of K5
The anode of the DC output end of full-bridge current transformer, input terminal, the input terminal of K4 of K2 are used as three-phase after being connected with the input terminal of K6
The cathode of the DC output end of full-bridge current transformer.
As shown in figure 3, power conversion unit chain link a1, power conversion unit chain link in a phase power conversion unit chain
Power conversion unit chain link b1, power conversion unit chain in a2 ... power conversion unit chain link aN, b phase power conversion unit chain
Save power conversion unit chain link c1, power conversion unit in b2 ... power conversion unit chain link bN, c phase power conversion unit chain
Chain link c2 ... power conversion unit chain link cN is same topological structure, is connected by isolated form DC/DC unit and H-bridge unit
It constitutes.
The isolated form DC/DC unit is preferably isolated type full-bridge DC/DC unit, including capacitor C1, capacitor C2,8 function
Rate devices switch S1, S2, S3, S4, S5, S6, S7, S8, high-frequency isolation transformer T, S1 input terminal be connected with S2 output end after again
Be connected with the input terminal 1 of high-frequency isolation transformer T, S3 input terminal be connected with S4 output end after again with high-frequency isolation transformer T
Input terminal 2 be connected, the output end of S1 be connected with the output end of S3, capacitor C1 positive terminal after be used as power conversion unit
The DC side anode of chain link, the input terminal of S2 are used as power conversion list after being connected with the input terminal of S4, capacitor C1 negative terminal
The DC side cathode of first chain link, S5 input terminal be connected with S6 output end after again with 3 phase of output terminal of high-frequency isolation transformer T
Even, S7 input terminal is connected with the output terminal 4 of high-frequency isolation transformer T again after being connected with S8 output end, the output end and S7 of S5
Output end, capacitor C2 positive terminal be connected after as isolated form DC/DC unit direct current output in power conversion unit chain link
Side anode, the input terminal of S6 are used as power conversion unit chain link interval after being connected with the input terminal of S8, capacitor C2 negative terminal
Release DC/DC unit DC output side cathode.
The H-bridge unit includes 4 power device switches S9, S10, S11, S12, and S9 input terminal is connected with S10 output end
Afterwards as the exchange side input terminal of power conversion unit chain link, S11 input terminal is used as power conversion list after being connected with S12 output end
The exchange side output end of first chain link, the output end of S9 and output end, the isolated form DC/DC unit DC output side anode of S11 are equal
It is connected, the input terminal of S10 is connected with the input terminal of S12, isolated form DC/DC unit DC output side cathode.
Embodiment:
A kind of high pressure direct screening energy accumulation current converter test platform application method: when phase power every in high pressure direct screening energy accumulation current converter
When converter unit chain includes 1 power conversion unit chain link, three-phase selection switch selection 690V ac bus passes through control three
The charge or discharge operating condition of true energy storage battery system is simulated in the inversion or rectification of phase converter system, is carried out high pressure direct screening energy storage and is become
Flow the charge-discharge performance test of three-phase single strand module in device；
When phase power conversion unit chain every in high pressure direct screening energy accumulation current converter includes 4 power conversion unit chain links,
Three-phase selection switch selection 2.5kV ac bus, simulates true energy storage electricity by the inversion or rectification that control three-phase converter system
The charge or discharge operating condition of cell system carries out the charge-discharge performance test of four chain module of three-phase in high pressure direct screening energy accumulation current converter；
When phase power conversion unit chain every in high pressure direct screening energy accumulation current converter includes 12 power conversion unit chain links,
Three-phase selection switch selection 10kV ac bus, simulates true energy-storage battery by the inversion or rectification that control three-phase converter system
The charge or discharge operating condition of system carries out the charge-discharge performance test of 12 chain module of three-phase in high pressure direct screening energy accumulation current converter.
A kind of high pressure direct screening energy accumulation current converter modular testing platform provided by the utility model and test circuit, realize
The energy feedback low-power consumption of high pressure direct screening energy accumulation current converter, battery simulation low cost, the purpose of multi-voltage grade high efficiency test.
The above is only the preferred embodiment of the utility model, it should be pointed out that: for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the protection scope of the utility model.
Claims (7)
1. a kind of high pressure direct screening energy accumulation current converter modular testing platform, it is characterised in that: include: three-phase selection switch, double wrap
Group transformer T1, four winding transformer T2, three-phase converter system, three-phase selection switch include the first contact, the second contact,
The secondary side three of the first of the input terminal independent of each other of third contact three and 1 output end, the first contact and two-winding transformer T1
Phase tap is connected, and the second contact is connected with the second secondary side three-phase tap of two-winding transformer T1, and third contact and double winding become
The third pair side three-phase tap of depressor T1 is connected；The four winding transformers T2 includes primary side winding and pair side three-phase windings A, pair
Three-phase windings C while three-phase windings B, secondary, the primary side of four winding transformer T2 are connected with the primary side of two-winding transformer T1；It is described
Three-phase converter system includes 3 3-phase power converter A, 3-phase power converter B and 3-phase power converter C independent of each other, 3-phase power converter A
Three-phase alternating current input terminal be connected with the secondary side three-phase windings A of four winding transformer T2, the input of the three-phase alternating current of 3-phase power converter B
End is connected with the secondary side three-phase windings B of four winding transformer T2, the three-phase alternating current input terminal of 3-phase power converter C and four winding transformations
The secondary side three-phase windings C of device T2 is connected.
2. a kind of high pressure direct screening energy accumulation current converter modular testing platform according to claim 1, it is characterised in that: described
The primary side line voltage of two-winding transformer T1 is 400V, and the line voltage of the first secondary side three-phase tap is 690V, the second secondary side three-phase
The line voltage of tap is 2.5kV, and the line voltage of third pair side three-phase tap is 10kV, the secondary side three-phase of four winding transformer T2 around
Group A, the secondary three-phase windings C in three-phase windings B and pair are 400V.
3. a kind of high pressure direct screening energy accumulation current converter modular testing circuit, it is characterised in that: three-phase selection switch, double winding transformation
Device T1, four winding transformer T2, three-phase converter system and high pressure direct screening energy accumulation current converter head and the tail are successively serially connected circlewise, double
The primary side of winding transformer is connected with power grid；
The three-phase selection switch includes that the first contact, the second contact, the input terminal independent of each other of third contact three and 1 are defeated
Outlet, the first contact are connected with the first secondary side three-phase tap of two-winding transformer T1, the second contact and two-winding transformer T1
The second secondary side three-phase tap be connected, third contact is connected with the third pair side three-phase tap of two-winding transformer T1；
The four winding transformers T2 includes primary side winding and secondary three-phase windings B, secondary side three-phase windings in three-phase windings A, pair
The primary side of C, four winding transformer T2 are connected with the primary side of two-winding transformer T1；
The three-phase converter system includes 3 3-phase power converter A independent of each other, 3-phase power converter B and 3-phase power converter C, and three
The three-phase alternating current input terminal of phase current transformer A is connected with the secondary side three-phase windings A of four winding transformer T2, and the three of 3-phase power converter B
Phase ac input end is connected with the secondary side three-phase windings B of four winding transformer T2, the three-phase alternating current input terminal of 3-phase power converter C with
The secondary side three-phase windings C of four winding transformer T2 is connected；
The a phase direct-flow input end of high pressure direct screening energy accumulation current converter is connected with the DC output end of 3-phase power converter A, high pressure direct screening storage
The b phase direct-flow input end of energy current transformer is connected with the DC output end of 3-phase power converter B, the c phase of high pressure direct screening energy accumulation current converter
Direct-flow input end is connected with the DC output end of 3-phase power converter C, the exchange side input terminal and three of high pressure direct screening energy accumulation current converter
Mutually the three-phase output end of selection switch is connected.
4. a kind of high pressure direct screening energy accumulation current converter modular testing circuit according to claim 3, it is characterised in that: described
The primary side line voltage of two-winding transformer T1 is 400V, and the line voltage of the first secondary side three-phase tap is 690V, the second secondary side three-phase
The line voltage of tap is 2.5kV, and the line voltage of third pair side three-phase tap is 10kV, the secondary side three-phase of four winding transformer T2 around
Group A, the secondary three-phase windings C in three-phase windings B and pair are 400V.
5. a kind of high pressure direct screening energy accumulation current converter modular testing circuit according to claim 3, it is characterised in that: described
High pressure direct screening energy accumulation current converter is by a phase power conversion unit chain, b phase power conversion unit chain, c phase power conversion unit chain and three
Mutually grid-connected reactor is in series, and the every phase power conversion unit chain of a, b, c includes the power conversion unit chain link of equivalent amount；
The a phase power conversion unit chain includes multiple power conversion unit chain links, the exchange of multiple power conversion unit chain links
Side input, output port are successively serially connected；The DC side input anode of multiple power conversion unit chain links, cathode distinguish phase
Mutually after parallel connection, a phase direct-flow input end as high pressure direct screening energy accumulation current converter is rectified with the direct current output of 3-phase power converter A respectively
Pole, cathode are connected；
The b phase power conversion unit chain includes multiple power conversion unit chain links, the exchange of multiple power conversion unit chain links
Side input, output port are successively serially connected；The DC side input anode of multiple power conversion unit chain links, cathode distinguish phase
Mutually after parallel connection, the b phase direct-flow input end as high pressure direct screening energy accumulation current converter is rectified with the direct current output of 3-phase power converter B respectively
Pole, cathode are connected,
The c phase power conversion unit chain includes multiple power conversion unit chain links, the exchange of multiple power conversion unit chain links
Side input, output port are successively serially connected；The DC side input anode of multiple power conversion unit chain links, cathode distinguish phase
Mutually after parallel connection, the c phase direct-flow input end as high pressure direct screening energy accumulation current converter is rectified with the direct current output of 3-phase power converter C respectively
Pole, cathode are connected；
The last one power conversion unit chain link of a phase exchanges side output end, and the last one power conversion unit chain link exchanges with b phase
Side output end exchanges side output end with c phase the last one power conversion unit chain link and homogeneously connects；
The output end of a phase first power conversion unit chain link exchange side input terminal and a phase reactance La of three-phase grid reactor
It is connected, the output end of b phase first power conversion unit chain link exchange side input terminal and the b phase reactance Lb of three-phase grid reactor
It is connected, the output end of c phase first power conversion unit chain link exchange side input terminal and the c phase reactance Lc of three-phase grid reactor
It is connected；
Input terminal, the three-phase of the input terminal of a phase reactance La of three-phase grid reactor, the b phase reactance Lb of three-phase grid reactor
The input terminal of the c phase reactance Lc of grid-connected reactor is selected collectively as the exchange side input terminal and three-phase of high pressure direct screening energy accumulation current converter
The three-phase output end for selecting switch is connected.
6. a kind of high pressure direct screening energy accumulation current converter modular testing circuit according to claim 3, it is characterised in that: described
3-phase power converter A, the 3-phase power converter B of three-phase converter system are identical with 3-phase power converter C, using three phase full bridge unsteady flow
Device, the three phase full bridge current transformer include power device switch K1, K2, K3, K4, K5, K6 of 6 same models, the input of K1
Hold a phase ac input end after being connected with the output end of K2 as three phase full bridge current transformer, the input terminal of K3 and the output end of K4
B phase ac input end after being connected as three phase full bridge current transformer, the input terminal of K5 are used as three-phase after being connected with the output end of K6
The c phase ac input end of full-bridge current transformer, output end, the output end of K3 of K1 are used as three phase full bridge after being connected with the output end of K5
The anode of the DC output end of current transformer, input terminal, the input terminal of K4 of K2 are used as three phase full bridge after being connected with the input terminal of K6
The cathode of the DC output end of current transformer.
7. a kind of high pressure direct screening energy accumulation current converter modular testing circuit according to claim 5, it is characterised in that: described
Power conversion unit chain link include: isolated form DC/DC unit and H-bridge unit series connection, the isolated form DC/DC unit be set as every
Release full-bridge DC/DC unit, including capacitor C1, capacitor C2,8 power device switch S1, S2, S3, S4, S5, S6, S7, S8, height
Frequency isolating transformer T, S1 input terminal is connected with the first input end of high-frequency isolation transformer T again after being connected with S2 output end,
S3 input terminal is connected with the second input terminal of high-frequency isolation transformer T again after being connected with S4 output end, the output end and S3 of S1
Output end, capacitor C1 positive terminal be connected after as power conversion unit chain link DC side anode, the input terminal of S2 and
DC side cathode as power conversion unit chain link after the input terminal of S4, capacitor C1 negative terminal are connected, S5 input terminal and
S6 output end is connected with the third output terminal of high-frequency isolation transformer T again after being connected, after S7 input terminal is connected with S8 output end
It is connected again with the 4th output terminal of high-frequency isolation transformer T, the output end of S5 and output end, the capacitor C2 positive terminal of S7 are equal
As isolated form DC/DC unit DC output side anode in power conversion unit chain link after being connected, the input terminal of S6 and S8's is defeated
Enter negative as isolated form DC/DC unit DC output side in power conversion unit chain link after end, capacitor C2 negative terminal are connected
Pole；
The H-bridge unit includes 4 power device switches S9, S10, S11, S12, and S9 input terminal is made after being connected with S10 output end
For the exchange side input terminal of power conversion unit chain link, S11 input terminal is used as power conversion unit chain after being connected with S12 output end
The output end of the exchange side output end of section, S9 is connected with the output end of S11, isolated form DC/DC unit DC output side anode,
The input terminal of S10 is connected with the input terminal of S12, isolated form DC/DC unit DC output side cathode.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188156A (en) * | 2018-11-06 | 2019-01-11 | 威凡智能电气高科技有限公司 | A kind of high pressure direct screening energy accumulation current converter modular testing platform and test circuit |
| CN111722036A (en) * | 2020-06-11 | 2020-09-29 | 天津瑞能电气有限公司 | Cascade type power module test platform |
| CN117434369A (en) * | 2023-10-26 | 2024-01-23 | 南京国电南自新能源科技有限公司 | High-voltage direct-hanging energy storage variable-current power unit testing system and method |
-
2018
- 2018-11-06 CN CN201821822752.6U patent/CN209311592U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188156A (en) * | 2018-11-06 | 2019-01-11 | 威凡智能电气高科技有限公司 | A kind of high pressure direct screening energy accumulation current converter modular testing platform and test circuit |
| CN111722036A (en) * | 2020-06-11 | 2020-09-29 | 天津瑞能电气有限公司 | Cascade type power module test platform |
| CN117434369A (en) * | 2023-10-26 | 2024-01-23 | 南京国电南自新能源科技有限公司 | High-voltage direct-hanging energy storage variable-current power unit testing system and method |
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