CN108123463A - A kind of energy accumulation current converter based on multiplex DC/DC converters - Google Patents
A kind of energy accumulation current converter based on multiplex DC/DC converters Download PDFInfo
- Publication number
- CN108123463A CN108123463A CN201611073303.1A CN201611073303A CN108123463A CN 108123463 A CN108123463 A CN 108123463A CN 201611073303 A CN201611073303 A CN 201611073303A CN 108123463 A CN108123463 A CN 108123463A
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- CN
- China
- Prior art keywords
- multiplex
- converters
- control
- grid
- current transformer
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a kind of current transformer based on multiplex DC/DC converters, including multiplex DC/DC converters, grid-connect mode control, off-network scheme control three parts.The present invention is using the topology parallel more DC/DC of twin-stage.Each DC/DC modules use the design of multiplex, optimize current ripples and its harmonic wave；Converting Unit uses the Three-phase PWM Voltage Rectifier that principle is simple, is easily achieved.By to energy accumulation current converter it is grid-connected/off-network difference operating mode under functional study formulate corresponding control strategy, and droop control and SOC feedback controls are introduced into control.For designed energy accumulation current converter while normal function is completed, the operation characteristic of itself is also very good.
Description
Technical field
The present invention relates to a kind of energy accumulation current converter more particularly to a kind of current transformers based on multiplex DC/DC converters.
Background technology
The environmental problem for excessively using and its bringing of non-renewable energy resources allows people that sight is focused more on ether
Sun can be on the distributed energy of representative.But distributed power generation be there are problems that in developing and challenge, for example, wind energy, the sun
Can in itself there are randomness, it is intermittent the features such as, it is difficult to artificial Accurate Prediction, energy output are unstable etc., largely reduced point
The effect of cloth power supply
Micro-capacitance sensor, self-contr ol, protection and the autonomous system of management can be realized by being one, generally by distributed generation resource, energy storage
The part such as device, power conversion unit, load, monitoring system and protective device forms, and is the important component of intelligent grid.
Micro-capacitance sensor can both be considered as a controllable in bulk power grid, meet the needs of external transmission and distribution networks；It can also provide not
Uninterruptible power keeps local voltage stabilization, reduces feeder loss, increases local reliability etc..Realize these functions, microgrid system
Energy storage section is particularly important in system.
Energy storage section in micro-grid system needs to complete diversified function, the structure of energy accumulation current converter, topology and
The selection of control strategy is most important.In micro-grid system, light storage joint micro-capacitance sensor is most commonly seen.
The content of the invention
In order to overcome the problems, such as that common energy accumulation current converter cannot meet light storage micro-capacitance sensor requirement, the present invention proposes a kind of base
In the current transformer of multiplex DC/DC converters.
The technical solution adopted by the present invention to solve the technical problems is：
Based on the current transformer of multiplex DC/DC converters, including multiplex DC/DC converters, grid-connect mode control, off-network pattern
Control three parts.
The multiplex DC/DC converters can realize the independent control to multiple battery packs, and circulation is avoided to occur；It can be with
The capacity of flexible configuration battery system realizes the flexible switching of battery pack, facilitates operational management.
The grid-connect mode control undertakes power smooth and the function of peak load shifting in microgrid, can timely respond to microgrid
The power instruction of system, makes system reach stable state.
The off-network scheme control be using droop control, can be by including sagging discharge mode and sagging charge mode
Carry out responding power according to the sagging curve automatic adjustment set to give
The beneficial effects of the invention are as follows：The present invention is using the topology parallel more DC/DC of twin-stage.Each DC/DC modules are using more
The design changed again optimizes current ripples and its harmonic wave；Converting Unit uses the three-phase voltage type that principle is simple, is easily achieved
PWM rectifier.By to energy accumulation current converter it is grid-connected/off-network difference operating mode under functional study formulate corresponding control strategy, and
Droop control and SOC feedback controls are introduced into control.Designed energy accumulation current converter is while normal function is completed, certainly
The operation characteristic of body is also very good.
Description of the drawings
Fig. 1 multiplex DC/DC converters.
Fig. 2 grid-connect mode control block diagrams.
Fig. 3 off-network scheme control block diagrams.
Specific embodiment
As shown in Figure 1, changing the amperometry of DC/DC modules again for m, the agreement unit converter switches cycle is TS,
Switching frequency is.Circuit uses PWM modulation systems, and switching tube begins to turn on time mutual mistake TS/m.If in a switch periods TS
In, the duty cycle D of m converter unit switching device is identical, then each circuit inductance electric current iL1 (t), iL2 (t), iL3
(t) ..., iLm (t) is phase difference TS/m, the identical pulsating current of waveform.
As shown in Figure 2 and Figure 3, under grid-connect mode, energy storage undertakes power smooth and the function of peak load shifting in microgrid, needs
The power instruction of micro-grid system is timely responded to, system is made to reach stable state.Under grid-connect mode, DC/AC current transformers are in whole
Stream or inverter mode are completed to be responsible for controlling the constant of DC voltage while power grid energy interaction；DC/DC single electric current ring controls
System, the instruction given by the impulse electricity power for controlling accumulator come response system.The single electric current that DC/DC is used in such a mode
Closed loop is identical per road given value of current, and first via pulse signal is maintained as former state, with tri- road signals of Zhe after delay after being adjusted by PI
Trigger switch device respectively makes also to make while actual current trace command electric current electric current on each inductance to meet wanting for triple modular redundant
It asks.DC/AC current transformers are using the voltage oriented control (VOC) based on voltage on line side.Voltage oriented control uses direct current
Outer shroud, the double circle structure of current on line side inner ring are pressed, outer voltage can maintain the stabilization of intermediate dc side voltage, current inner loop
Carry out current control.By Double closed-loop of voltage and current, it can realize that net side unity power factor is grid-connected.
Under off-network pattern, electrical breakdown, the DC/AC current transformers of energy accumulation current converter no longer possess stable intermediate dc side voltage
Ability, DC voltage needs are stablized by DC/DC converters, but in view of each module automatic current equalizing, inhibit circulation etc. because
Droop control is introduced the control of DC/DC converters by element, the present invention.The principle of droop control is in DC/DC control strategies
" DC voltage Vdc-inductive current IL " sagging curve is write, inductive current IL set-points are according to direct current during order control
The size of side voltage Vdc is carried out responding power according to the sagging curve automatic adjustment set and is given.Droop control includes sagging fill
Two kinds of power mode, sagging discharge mode.
Claims (4)
1. a kind of current transformer based on multiplex DC/DC converters, it is characterised in that：Including multiplex DC/DC converters, grid-connected
Scheme control, off-network scheme control three parts.
2. the current transformer as described in claim 1 based on multiplex DC/DC converters, it is characterised in that the multiplex DC/
DC converters can realize the independent control to multiple battery packs, and circulation is avoided to occur；It can be with the appearance of flexible configuration battery system
Amount, realizes the flexible switching of battery pack, facilitates operational management.
3. the current transformer as described in claim 1 based on multiplex DC/DC converters, it is characterised in that the grid-connect mode control
The function that power smooth and peak load shifting are undertaken in microgrid is made, the power instruction of micro-grid system can be timely responded to, make system
Reach stable state.
4. the current transformer as described in claim 1 based on multiplex DC/DC converters, it is characterised in that the off-network pattern control
System is to use droop control, can be automatic according to the sagging curve set including sagging discharge mode and sagging charge mode
Adjusting carrys out responding power and gives.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611073303.1A CN108123463A (en) | 2016-11-29 | 2016-11-29 | A kind of energy accumulation current converter based on multiplex DC/DC converters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611073303.1A CN108123463A (en) | 2016-11-29 | 2016-11-29 | A kind of energy accumulation current converter based on multiplex DC/DC converters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108123463A true CN108123463A (en) | 2018-06-05 |
Family
ID=62226758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611073303.1A Pending CN108123463A (en) | 2016-11-29 | 2016-11-29 | A kind of energy accumulation current converter based on multiplex DC/DC converters |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108123463A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109116752A (en) * | 2018-08-31 | 2019-01-01 | 北京交通大学 | A kind of the dynamic model analogue system and control method of urban track traffic |
| CN112838657A (en) * | 2021-01-28 | 2021-05-25 | 国网河北省电力有限公司电力科学研究院 | Control method and device of charging system and terminal equipment |
-
2016
- 2016-11-29 CN CN201611073303.1A patent/CN108123463A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109116752A (en) * | 2018-08-31 | 2019-01-01 | 北京交通大学 | A kind of the dynamic model analogue system and control method of urban track traffic |
| CN112838657A (en) * | 2021-01-28 | 2021-05-25 | 国网河北省电力有限公司电力科学研究院 | Control method and device of charging system and terminal equipment |
| CN112838657B (en) * | 2021-01-28 | 2023-09-26 | 国网河北省电力有限公司电力科学研究院 | Control method and device of charging system and terminal equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180605 |
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| WD01 | Invention patent application deemed withdrawn after publication |