CN110350558A - A kind of PCS accumulator and device - Google Patents
A kind of PCS accumulator and device Download PDFInfo
- Publication number
- CN110350558A CN110350558A CN201910770213.5A CN201910770213A CN110350558A CN 110350558 A CN110350558 A CN 110350558A CN 201910770213 A CN201910770213 A CN 201910770213A CN 110350558 A CN110350558 A CN 110350558A
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- pcs
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- energy
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- 238000004146 energy storage Methods 0.000 claims abstract description 46
- 230000033228 biological regulation Effects 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000002955 isolation Methods 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 claims description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 206010010774 Constipation Diseases 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000006549 dyspepsia Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of PCS accumulator and device, PCS accumulator includes: the first PCS module；The DC terminal of 2nd PCS module, the 2nd PCS module is connect with the DC terminal of the first PCS module, and the exchange end of the 2nd PCS module is connect with the exchange end of the first PCS module；Energy-storage module, the input/output terminal of the energy-storage module are connect with the DC terminal of the first PCS module；Voltage regulator module, the input terminal of the voltage regulator module is for connecting AC network.The present invention provides DC voltage support by energy-storage module for the first PCS module and the 2nd PCS module, and set that there are two PCS modules in parallel, between first PCS module and the 2nd PCS module can mutual charge and discharge, realize the fully loaded of the first PCS module and the 2nd PCS module under any power grid.
Description
Technical field
The present invention relates to power supply system technical field more particularly to a kind of PCS accumulators and device.
Background technique
With with big function such as the propulsion of the change of renewable energy substitution fossil energy, energy internet and electric cars
The development of rate load, it is many-sided to stability, safety of power grid etc. worth thinking deeply about, to have intelligent control in hair, defeated, electricity consumption side
The huge challenge of system and optimal coordination；Energy storage technology has potential advantage for the flexible modulation of electric system, in frequency modulation, adjusts
Peak, demand response, micro-capacitance sensor, there are biggish popularization and application for the multiple fields such as provide multiple forms of energy to complement each other, and energy accumulation current converter (PCS) is in energy storage
It is to realize the core of energy in bidirectional flow, therefore the demand of energy accumulation current converter (PCS) will increase year by year in.
In PCS device in use, the fully loaded performance to PCS device, reliability performance etc. is needed to test, current is big
In power energy storage pcs system, is needed in specific power grid in the performance test to PCS device, be not applied for any electricity
Net, test environment are limited.
Summary of the invention
The embodiment of the invention provides a kind of PCS accumulator and devices, it is intended to solve at present to survey the performance of PCS device
The problem of examination cannot carry out under any power grid.
First aspect of the embodiment of the present invention provides a kind of PCS accumulator, comprising:
First PCS module；
The DC terminal of 2nd PCS module, the 2nd PCS module is connect with the DC terminal of the first PCS module, described
The exchange end of 2nd PCS module is connect with the exchange end of the first PCS module；
Energy-storage module, the input/output terminal of the energy-storage module are connect with the DC terminal of the first PCS module, for pair
The first PCS module and the 2nd PCS module provide DC voltage support；
Voltage regulator module, the input terminal of the voltage regulator module adjust mould for connecting AC network, the voltage
Block is for the voltage of the AC network to be converted into charging to the energy-storage module after DC voltage.
In embodiments of the present invention, the voltage regulator module includes:
Pressure regulation unit, the input terminal of the pressure regulation unit are the input terminal of the voltage regulator module, are used for the friendship
Stream network voltage is adjusted to preset alternating voltage；
Voltage conversion unit, the input terminal of the voltage conversion unit is connected with the output end of the pressure regulation unit, described
The output end of voltage conversion unit is the output end of the voltage regulator module, for the preset alternating voltage to be converted into
DC voltage.
In embodiments of the present invention, the pressure regulation unit includes:
Pressure regulator, the input terminal of the pressure regulator are the input terminal of the pressure regulation unit；
Transformer, the input terminal of the transformer are connected with the output end of the pressure regulator, the output end of the transformer
For the output end of the pressure regulation unit.
In embodiments of the present invention, the voltage conversion unit is rectifier circuit.
In embodiments of the present invention, the energy-storage module includes super capacitor.
It in embodiments of the present invention, further include isolation module, the DC terminal of the first PCS module and the 2nd PCS
DC terminal connect and realize isolation by the isolation module.
In embodiments of the present invention, the isolation module includes: at least two reactors, wherein at least one reactor
Between the first port of the DC terminal of the first port and the 2nd PCS module of the DC terminal of the first PCS module；
At least one reactor is located at the second port of the DC terminal of the first PCS module and the DC terminal of the 2nd PCS module
Second port between.
In embodiments of the present invention, the maximum rated voltage of the energy-storage module is greater than the specified of the first PCS module
DC voltage maximum value；And the maximum rated voltage of the energy-storage module is greater than the rated direct voltage maximum of the 2nd PCS module
Value.
In embodiments of the present invention, the first PCS module is identical with the 2nd PCS module.
Second aspect of the embodiment of the present invention provides a kind of PCS energy storage device, including above-described PCS accumulator.
The present invention provides DC voltage support by energy-storage module for the first PCS module and the 2nd PCS module,
And set there are two PCS module in parallel, the mutual charge and discharge of energy between the first PCS module and the 2nd PCS module are realized any
The first PCS module and the 2nd PCS module is fully loaded under power grid.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to needed in the embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without any creative labor, it can also be obtained according to these attached drawings others
Attached drawing.
Fig. 1 is the structural schematic diagram for the PCS accumulator that one embodiment of the present of invention provides.
Wherein: 1, the first PCS module；2, the 2nd PCS module；3, energy-storage module；4, voltage regulator module；5, pressure regulation list
Member；6, voltage conversion unit.
Specific embodiment
In order to make those skilled in the art more fully understand this programme, below in conjunction with attached in this programme embodiment
Figure, is explicitly described the technical solution in this programme embodiment, it is clear that described embodiment is this programme a part
Embodiment, instead of all the embodiments.Based on the embodiment in this programme, those of ordinary skill in the art are not being made
The range of this programme protection all should belong in every other embodiment obtained under the premise of creative work.
The specification and claims of this programme and term " includes " and other any deformations in above-mentioned attached drawing are
Refer to " including but not limited to ", it is intended that cover and non-exclusive include.In addition, term " first " and " second " etc. are for distinguishing
Different objects, not for description particular order.
Realization of the invention is described in detail below in conjunction with specific attached drawing:
Fig. 1 shows a kind of PCS accumulator and device provided by one embodiment of the invention, for ease of description, only
Part related to the embodiment of the present invention is shown, details are as follows:
As shown in Figure 1, a kind of PCS accumulator provided by the embodiment of the present invention, comprising:
First PCS module 1；
The DC terminal of 2nd PCS module 2, the 2nd PCS module 2 is connect with the DC terminal of the first PCS module 1,
The exchange end of the 2nd PCS module 2 is connect with the exchange end of the first PCS module 1；
Energy-storage module 3, the input/output terminal of the energy-storage module 3 are connect with the DC terminal of the first PCS module 1, are used
It is supported in providing DC voltage to the first PCS module 1 and the 2nd PCS module 2；
Voltage regulator module 4, the input terminal of the voltage regulator module 4 are adjusted for connecting AC network, the voltage
Module 4 is for the voltage of the AC network to be converted into charging to the energy-storage module 3 after DC voltage.
In the present embodiment, power grid is continuously the charging of energy-storage module 3, maintains 3 DC voltage of energy-storage module constant.
In the present embodiment, setting for the first PCS module 1 and the 2nd PCS module 2 can be replenished in time in energy-storage module 3
Received shipment row power consumption.
It is that the first PCS module 1 and the 2nd PCS module 2 provide by energy-storage module 3 in the embodiment of the present invention
DC voltage support, and set that there are two PCS modules in parallel, it can be mutually between the first PCS module 1 and the 2nd PCS module 2
The fully loaded of the first PCS module 1 and the 2nd PCS module 2 under any power grid is realized in charge and discharge, for PCS device be fully loaded with performance test and
Reliability test provides help.
By the first PCS module 1 and the 2nd PCS module 2 and off-network both of which liquidate, PCS device and power grid
It is detached from and is in island state, since PCS is high-power active equipment, when this state can be avoided equipment overcurrent or remaining failure pair
Power grid generates extreme shock, reduces the voltage current impact to power grid；It can be carried out when plant area's transformer capacity is smaller big
The test of power charging and discharging.
In use, AC network is the charging of energy-storage module 3 by voltage regulator module 4.Energy-storage module 3 is the first PCS mould
Block 1 and the 2nd PCS module 2 do DC voltage support.For example, 1 off-network mode operation of the first PCS module, the 2nd PCS module 2 with
The mode that is incorporated into the power networks is grid-connected in the first PCS module 1, grid-connection device can be carried out with constant power mode or constant current mode charging or
Electric discharge, when the 2nd PCS module 2 being incorporated into the power networks projects active electric discharge, off-grid first PCS module 1 absorbs active filled
Electricity, so that DC voltage kept stable；
Namely energy-storage module 3 is respectively that the first PCS module 1 and the 2nd PCS module 2 provide DC voltage and support, and first
The mutual charge and discharge of PCS module 1 and the 2nd PCS module 2, when it is inverter mode that the first PCS module 1, which is in electric discharge, the first PCS
The exchange side energy that module 1 comes out from DC side inversion is rectified for the charging of the 2nd PCS module 2 and is used；When the first PCS mould
Block 1 be in charging be rectification state when, the 2nd PCS module 2 be in electric discharge be inverter mode, 2 inversion of the 2nd PCS module come out
The charging rectifier that side energy is the first PCS module 1 is exchanged to use.In this way energy the first PCS module 1 and the 2nd PCS module 2 it
Between by rectification, inversion form constantly recycle, formed charging and discharging currents, can make at the first PCS module 1 and the 2nd PCS module 2
In full load condition.
The PCS module that is connected of energy-storage module one is given it to charge, and one is given it to discharge, and the two charging and discharging currents mutually support
Treatment for relieving indigestion and constipation causes energy-storage module to be in a stable state, substantially without electric current output input.But because two PCS modules exist
The problem of consistency such as loss, accuracy error, the charge-discharge electric power that can have very little is poor, this difference power determines energy-storage module
In being charged or discharged state.But because the energy of two PCS modules is mentioned all from energy-storage module without other energy
For so difference power can only be negative, i.e., electric discharge PCS DC side power is greater than charging PCS DC side power, causes at energy-storage module
In discharge condition, this difference is mainly the loss of two PCS devices, it is therefore desirable to which voltage regulator module is filled to energy-storage module
Electricity supplements the energy of the energy-storage module consumed by PCS module loss, guarantees the stabilization of DC voltage.
In an embodiment of the present invention, the voltage regulator module 4 includes:
Pressure regulation unit 5, the input terminal of the pressure regulation unit 5 are the input terminal of the voltage regulator module 4, and being used for will be described
Ac grid voltage is adjusted to preset alternating voltage；
Voltage conversion unit 6, the input terminal of the voltage conversion unit 6 are connected with the output end of the pressure regulation unit 5, institute
The output end for stating voltage conversion unit 6 is the output end of the voltage regulator module 4, for turning the preset alternating voltage
Change DC voltage into.
In an embodiment of the present invention, the pressure regulation unit 5 includes:
Pressure regulator, the input terminal of the pressure regulator are the input terminal of the pressure regulation unit 5；
Transformer, the input terminal of the transformer are connected with the output end of the pressure regulator, the output end of the transformer
For the output end of the pressure regulation unit 5.
In an embodiment of the present invention, the voltage conversion unit 6 is rectifier circuit.
In the present embodiment, preset alternating voltage is converted into DC voltage by rectifier bridge.
In an embodiment of the present invention, the energy-storage module 3 includes super capacitor.
In the present embodiment, PCS DC side cell apparatus is simulated using super capacitor group.
It in an embodiment of the present invention, further include isolation module, the DC terminal and described second of the first PCS module 1
The DC terminal of PCS connects by the isolation module and realizes isolation.
In the present embodiment, the DC current radio-frequency component that the 2nd PCS module generates is isolated module barrier, makes it can not
It is flowed between two PCS modules, guarantees the stabilization of system.
In an embodiment of the present invention, the isolation module includes: at least two reactors, wherein at least one reactance
Device is located at the first port of the first port of the DC terminal of the first PCS module 1 and the DC terminal of the 2nd PCS module 2
Between；At least one reactor is located at the second port and the 2nd PCS module 2 of the DC terminal of the first PCS module 1
Between the second port of DC terminal.
In the present embodiment, the first port of the DC terminal of the first PCS module 1 is anode, the direct current of the first PCS module 1
The second port at end is cathode.
In an embodiment of the present invention, the maximum rated voltage of the energy-storage module 3 is greater than the first PCS module 1
Rated direct voltage maximum value；And the maximum rated voltage of the energy-storage module 3 is greater than the rated DC current of the 2nd PCS module 2
Press maximum value.
In the present embodiment, the maximum rated voltage of energy-storage module 3 is greater than the rated DC current of the first PCS module 1
Press maximum value；And the maximum rated voltage of the energy-storage module 3 is greater than the rated direct voltage maximum value of the 2nd PCS module 2, protects
Having demonstrate,proved energy-storage module 3 can charge for the first PCS module 1 and the 2nd PCS module 2, make the first PCS module 1 and the 2nd PCS module 2
In full load condition.
In an embodiment of the present invention, the first PCS module 1 and the 2nd PCS module 2 are identical.
In the present embodiment, the first PCS module 1 and the 2nd PCS module 2 must all have grid-connected and off-grid operation function.
In an embodiment of the present invention, the rated capacity of the first PCS module 1 and the 2nd PCS module 2 can phase
It is same to can also be different.
A kind of PCS energy storage device, including above-described PCS accumulator.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although referring to before
Stating embodiment, invention is explained in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of PCS accumulator characterized by comprising
First PCS module；
The DC terminal of 2nd PCS module, the 2nd PCS module is connect with the DC terminal of the first PCS module, and described second
The exchange end of PCS module is connect with the exchange end of the first PCS module；
Energy-storage module, the input/output terminal of the energy-storage module are connect with the DC terminal of the first PCS module, for described
First PCS module and the 2nd PCS module provide DC voltage support；
Voltage regulator module, the input terminal of the voltage regulator module are used for connecting AC network, the voltage regulator module
It charges after the voltage of the AC network is converted into DC voltage to the energy-storage module.
2. PCS accumulator as described in claim 1, which is characterized in that the voltage regulator module includes:
Pressure regulation unit, the input terminal of the pressure regulation unit are the input terminal of the voltage regulator module, are used for the alternating current
Net voltage is adjusted to preset alternating voltage；
Voltage conversion unit, the input terminal of the voltage conversion unit are connected with the output end of the pressure regulation unit, the voltage
The output end of converting unit is the output end of the voltage regulator module, for the preset alternating voltage to be converted into direct current
Voltage.
3. PCS accumulator as claimed in claim 2, which is characterized in that the pressure regulation unit includes:
Pressure regulator, the input terminal of the pressure regulator are the input terminal of the pressure regulation unit；
Transformer, the input terminal of the transformer are connected with the output end of the pressure regulator, and the output end of the transformer is institute
State the output end of pressure regulation unit.
4. PCS accumulator as claimed in claim 2, which is characterized in that the voltage conversion unit is rectifier circuit.
5. PCS accumulator as described in claim 1, which is characterized in that the energy-storage module includes super capacitor.
6. PCS accumulator as described in claim 1, which is characterized in that it further include isolation module, the first PCS module
DC terminal connected with the DC terminal of the 2nd PCS by the isolation module and realize isolation.
7. PCS accumulator as claimed in claim 6, which is characterized in that the isolation module includes: at least two reactance
Device, wherein at least one reactor is located at the first port and the 2nd PCS module of the DC terminal of the first PCS module
DC terminal first port between；At least one reactor be located at the DC terminal of the first PCS module second port and
Between the second port of the DC terminal of the 2nd PCS module.
8. PCS accumulator as described in claim 1, which is characterized in that the maximum rated voltage of the energy-storage module is greater than
The rated direct voltage maximum value of the first PCS module；And the maximum rated voltage of the energy-storage module is greater than the 2nd PCS mould
The rated direct voltage maximum value of block.
9. PCS accumulator as described in claim 1, which is characterized in that the first PCS module and the 2nd PCS mould
Block is identical.
10. a kind of PCS energy storage device, including the PCS accumulator described in claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910770213.5A CN110350558A (en) | 2019-08-20 | 2019-08-20 | A kind of PCS accumulator and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910770213.5A CN110350558A (en) | 2019-08-20 | 2019-08-20 | A kind of PCS accumulator and device |
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| Publication Number | Publication Date |
|---|---|
| CN110350558A true CN110350558A (en) | 2019-10-18 |
Family
ID=68180918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910770213.5A Pending CN110350558A (en) | 2019-08-20 | 2019-08-20 | A kind of PCS accumulator and device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111025057A (en) * | 2019-12-06 | 2020-04-17 | 平高集团有限公司 | Energy storage PCS test platform |
| CN111208365A (en) * | 2020-01-06 | 2020-05-29 | 平高集团有限公司 | PCS test system |
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