CN109494776A - The grid-connected bidirectional converter of energy-storage system and off-network double mode operation method - Google Patents
The grid-connected bidirectional converter of energy-storage system and off-network double mode operation method Download PDFInfo
- Publication number
- CN109494776A CN109494776A CN201811452524.9A CN201811452524A CN109494776A CN 109494776 A CN109494776 A CN 109494776A CN 201811452524 A CN201811452524 A CN 201811452524A CN 109494776 A CN109494776 A CN 109494776A
- Authority
- CN
- China
- Prior art keywords
- grid
- bidirectional converter
- connected bidirectional
- network
- mode
- Prior art date
- 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.)
- Pending
Links
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
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
A kind of grid-connected bidirectional converter of energy-storage system and off-network double mode operation method, grid-connected bidirectional converter is according to the state of dc circuit breaker and A.C. contactor inside collected grid-connected switch disconnector status feedback signal, mains voltage signal, grid-connected bidirectional converter, and the instruction that user issues, judge the operational mode of grid-connected bidirectional converter.When power grid is normal, the grid-connected bidirectional converter of the energy-storage system operates in grid-connect mode, according to the scheduling of Energy Management System, controls energy in bidirectional flow, the charge and discharge for completing energy-storage battery is electrically operated；When grid power blackout, the grid-connected bidirectional converter of the energy-storage system switches to off-network mode and runs as voltage source, maintains the normal work of energy-accumulating power station.
Description
Technical field
The present invention relates to a kind of grid-connected bidirectional converter of energy-storage system and off-network double mode operation method.
Background technique
Critical component of the energy accumulation current converter as energy-storage system plays the function of connection battery and power grid.Traditional storage
Energy power station mostly uses grid-connected bidirectional converter connection power grid and energy-storage units.Existing grid-connected bidirectional converter is normal in power grid
In the case of, according to the scheduling of Energy Management System, energy in bidirectional flow is controlled, the charge and discharge for completing energy-storage battery is electrically operated.But
When electric network fault can not power, grid-connected bidirectional converter can not start, and shutdown can not work, and entirely store up after leading to grid cut-off
It paralyses in energy power station.If buying new equipment replaces existing grid-connected bidirectional converter, need to spend a large amount of money therefore,
Existing grid-connected bidirectional converter is transformed as economical and practical selection.
A kind of method that grid-connected bidirectional converter transform double-mode converter as is proposed in patent CN102185333B, it should
Method increases one and off-network controller in micro-grid system, increases hardware cost；Meanwhile this method is for current transformer
It is no to meet grid-connected conditions and the judgement of off-network condition is excessively cumbersome, increase software calculation amount.
Summary of the invention
The shortcomings that the purpose of the present invention is bidirectional converters grid-connected for existing energy-storage system, in the premise for not increasing hardware
Under, propose a kind of grid-connected bidirectional converter and off-network double mode operation method, realize the grid-connected bidirectional converter of energy-storage system and from
The operation of net double mode.
The present invention can make the grid-connected bidirectional converter of energy-storage system have the two-way flows of the charge and discharge of energy-storage battery, energy
The functions such as simultaneously/off-grid operation mode switching.When power grid is normal, using the grid-connected bidirectional converter of energy-storage system of the invention
Grid-connect mode is operated in, according to the scheduling of Energy Management System, controls energy in bidirectional flow, completes the charge and discharge behaviour of energy-storage battery
Make；When grid power blackout, off-network mode is switched to as voltage source using the grid-connected bidirectional converter of energy-storage system of the invention and is transported
Row, maintains the normal work of energy-accumulating power station.Meanwhile to reduce duration and cost, energy-accumulating power station existing one can be kept
Secondary topological novariable.
Concrete scheme of the invention is as follows:
It include: 10kV high voltage AC bus, box type transformer, 380V low-voltage alternating-current using energy-storage system topology of the invention
Bus, grid-connected bidirectional converter, battery pack, load, high voltage side of transformer breaker, grid-connected switch disconnector, load-side open circuit
Device and AC side of converter breaker.The high-pressure side of the box type transformer passes through high voltage side of transformer breaker and 10kV high
Pressure ac bus is connected, and the low-pressure side of box type transformer is connected by grid-connected switch disconnector with 380V low-voltage alternating-current bus
It connects, 380V low-voltage alternating-current bus is connected by AC side of converter breaker with the side that exchanges of grid-connected bidirectional converter, grid-connected
The DC side of bidirectional converter is connected with battery pack, meanwhile, 380V low-voltage alternating-current bus also passes through load-side breaker and bears
Load is connected.
The invention adopts the following technical scheme:
The input that the feedback signal of the grid-connected switch disconnector of energy-storage system passes through master control borad inside grid-connected bidirectional converter
Grid-connected bidirectional converter is sent into port, and when grid-connected switch disconnector closure, it is disconnected that grid-connected bidirectional converter receives grid-connected switch
The closed state feedback signal of road device；When grid-connected switch disconnector disconnects, it is disconnected that grid-connected bidirectional converter receives grid-connected switch
The off-state feedback signal of road device.
Master control borad inside the grid-connected bidirectional converter acquires grid-connected switch disconnector status feedback signal, power grid electricity
The state of dc circuit breaker and A.C. contactor inside pressure signal, grid-connected bidirectional converter, grid-connected bidirectional converter is according to upper
It states information and instruction that user issues judges the operational mode of grid-connected bidirectional converter.
Since grid-connected switch disconnector is to manually control, grid-connected bidirectional converter is needed before simultaneously off-network pattern switching
Stop modulation operation, after grid-connected bidirectional converter receives the state feedback of grid-connected switch disconnector, again according still further to demand
Modulation operates in required mode.
Since there is no output transformers inside grid-connected bidirectional converter, if after the modulation operation of grid-connected bidirectional converter off-network
Over-current phenomenon avoidance can be occurred by reclosing its internal A.C. contactor run with load, therefore be increased in the grid-connected bidirectional converter
Hot standby mode, the mode after the dc circuit breaker closure inside grid-connected bidirectional converter to be successfully established to DC voltage are known as
Cold standby mode.
The operational mode of the grid-connected bidirectional converter of the energy-storage system is divided into: treating coldly machine, hot standby, off-grid operation and simultaneously
Net operation.
When grid-connected bidirectional converter detects the closure of the dc circuit breaker inside grid-connected bidirectional converter, grid-connected Bidirectional variable-flow
After device enters cold standby mode, if grid-connected bidirectional converter receives the grid-connected bidirectional converter internal communication of closure that user issues
The instruction of contactor, while grid-connected bidirectional converter detects that its internal A.C. contactor is in an off state, then is closed simultaneously
A.C. contactor inside net bidirectional converter, into hot standby mode.
After grid-connected bidirectional converter enters hot standby mode, if grid-connected bidirectional converter receives the modulation that user issues
Instruction, while grid-connected bidirectional converter receives the grid-connected instruction that user issues, then detects to grid-connected bidirectional converter grid-connected
When switch disconnector is in closed state and normal network voltage, grid-connected bidirectional converter is modulated with current source mode and is run,
Into grid-connect mode；The network voltage normally refers to that the amplitude of the current grid-connected collected network voltage of bidirectional converter does not surpass
The 80%-110% of voltage rating is crossed, and the frequency of network voltage is no more than 47.5Hz-52.5Hz.
After grid-connected bidirectional converter enters grid-connect mode, if grid-connected bidirectional converter detects network voltage exception, i.e.,
The amplitude of network voltage is more than the 80%-110% of voltage rating or the frequency of network voltage is more than 47.5Hz-52.5Hz, then
Grid-connected bidirectional converter stops modulation, into hot standby mode；It is detected at grid-connected switch disconnector to grid-connected bidirectional converter
In off-state, and after receiving the off-network instruction that user issues, grid-connected bidirectional converter is modulated with voltage source mode and is run,
Into off-network mode, grid-connected bidirectional converter is completed at the electric network fault moment from grid-connect mode to the unplanned of off-network pattern switching
Off-network process；If network voltage is normal, grid-connected bidirectional converter receives the off-network instruction that user issues, then grid-connected two-way change
Stream device needs first to remove flow of power, and after grid-connected bidirectional converter operation power is 0, grid-connected bidirectional converter is with voltage source mould
Formula modulation operation, into off-network mode, completes plan off-network of the grid-connected bidirectional converter from grid-connect mode to off-network pattern switching
Process.
After grid-connected bidirectional converter enters off-network mode, if grid-connected bidirectional converter detects that network voltage is normal, i.e.,
The amplitude of network voltage is no more than the 80%-110% of voltage rating, and the frequency of network voltage is no more than 47.5Hz-
52.5Hz, while grid-connected bidirectional converter detects the grid-connected instruction that user issues, and grid-connected bidirectional converter detects simultaneously
Net switch disconnector is in closed state, then grid-connected bidirectional converter stops modulation, into hot standby mode, then with current source mould
Formula modulation operation, into grid-connect mode, completes the process that grid-connected bidirectional converter switches from off-network mode to grid-connect mode.This hair
It is bright under the premise of not changing one secondary design of system and not increasing hardware in the original energy in bidirectional flow of grid-connected bidirectional converter
It completes to increase simultaneously/off-network double mode operation function on the basis of the function of the charge and discharge of energy-storage battery.When power grid is normal, and
Net bidirectional converter works in grid-connect mode；When electric network fault, off-network mode is switched to, the normal work of load is maintained, to electricity
Grid-connect mode is switched to after network recovery.
Detailed description of the invention
Fig. 1 is using system topological of the invention；
Fig. 2 is the double mode operational flow diagram of grid-connected bidirectional converter of the present invention.
Specific embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
As shown in Figure 1 using energy-storage system topology of the invention, comprising: 10kV high voltage AC bus, box type transformer T1,
380V low-voltage alternating-current bus, grid-connected bidirectional converter, battery pack, load, high voltage side of transformer breaker K1, the open circuit of grid-connected switch
Device K2, load-side breaker K3 and AC side of converter breaker K4.The high-pressure side of the box type transformer T1 passes through transformation
Device high-pressure side breaker K1 is connected with 10kV high voltage AC bus, and the low-pressure side of box type transformer T1 passes through grid-connected switch road device
K2 with 380V low-voltage alternating-current bus is connected, and 380V low-voltage alternating-current bus passes through AC side of converter breaker K4 and grid-connected two-way
The exchange side of current transformer is connected, and the DC side of current transformer is connected with battery pack, meanwhile, 380V low-voltage alternating-current bus also passes through
Load-side breaker K3 is connected with load.
The invention adopts the following technical scheme:
The feedback signal of the grid-connected switch disconnector K2 of energy-storage system is defeated by grid-connected bidirectional converter inside master control borad
Inbound port is sent into grid-connected bidirectional converter, when grid-connected switch disconnector K2 closure, grid-connected bidirectional converter receives grid-connected open
Close the closed state feedback signal of breaker K2；When grid-connected switch disconnector K2 is disconnected, grid-connected bidirectional converter is received simultaneously
The off-state feedback signal of net switch disconnector K2.
Master control borad inside the grid-connected bidirectional converter acquires grid-connected switch disconnector K2 status feedback signal, power grid
The state of dc circuit breaker and A.C. contactor inside voltage signal, grid-connected bidirectional converter, grid-connected bidirectional converter according to
The instruction that above- mentioned information and user issue judges the operational mode of grid-connected bidirectional converter.
Since grid-connected switch disconnector K2 is to manually control, grid-connected bidirectional converter is needed in simultaneously off-network pattern switching
Preceding stopping modulation operation, after grid-connected bidirectional converter receives the state feedback of grid-connected switch disconnector K2, according still further to demand
Re-modulation operates in required mode.
Since there is no output transformers inside grid-connected bidirectional converter, if after the modulation operation of grid-connected bidirectional converter off-network
Over-current phenomenon avoidance, therefore grid-connected bidirectional converter of the present invention can be occurred by reclosing its internal A.C. contactor run with load
Middle to increase hot standby mode, after the dc circuit breaker closure inside grid-connected bidirectional converter to be successfully established to DC voltage mould
Formula is known as cold standby mode.
The operational mode of the grid-connected bidirectional converter of the energy-storage system is divided into: treating coldly machine, hot standby, off-grid operation and simultaneously
Net operation.
When grid-connected bidirectional converter detects the dc circuit breaker closure of grid-connected Bidirectional inner, grid-connected bidirectional converter enters
After cold standby mode, if grid-connected bidirectional converter receives the grid-connected bidirectional converter internal communication contactor of closure that user issues
Instruction, while grid-connected bidirectional converter detects that its internal A.C. contactor is in an off state, then is closed grid-connected two-way
A.C. contactor inside current transformer, into hot standby mode.
After grid-connected bidirectional converter enters hot standby mode, if grid-connected bidirectional converter receives the modulation that user issues
Instruction, while grid-connected bidirectional converter receives the grid-connected instruction that user issues, then detects to grid-connected bidirectional converter grid-connected
When switch disconnector K2 is in closed state and normal network voltage, grid-connected bidirectional converter is modulated with current source mode and is transported
Row, into grid-connect mode；The network voltage normally refers to the amplitude of the current grid-connected collected network voltage of bidirectional converter
No more than the 80%-110% of voltage rating and the frequency of network voltage is no more than 47.5Hz-52.5Hz.
After grid-connected bidirectional converter enters grid-connect mode, if grid-connected bidirectional converter detects network voltage exception, i.e.,
The amplitude of network voltage is more than the 80%-110% of voltage rating or the frequency of network voltage is more than 47.5Hz-52.5Hz, then
Grid-connected bidirectional converter stops modulation, into hot standby mode；Grid-connected switch disconnector K2 is detected to grid-connected bidirectional converter
It is in an off state, and after receiving the off-network instruction that user issues, grid-connected bidirectional converter is modulated with voltage source mode and transported
Row completes grid-connected bidirectional converter at the electric network fault moment from grid-connect mode to the non-of off-network pattern switching into off-network mode
Plan off-network process；If network voltage is normal, grid-connected bidirectional converter receives the off-network instruction that user issues, then grid-connected double
It needs first to remove flow of power to current transformer, after grid-connected bidirectional converter operation power is 0, grid-connected bidirectional converter is with voltage
Source module modulation operation, into off-network mode, completes plan of the grid-connected bidirectional converter from grid-connect mode to off-network pattern switching
Off-network process.
After grid-connected bidirectional converter enters off-network mode, if grid-connected bidirectional converter detects that network voltage is normal, i.e.,
The amplitude of network voltage is no more than the 80%-110% of voltage rating, and the frequency of network voltage is no more than 47.5Hz-
52.5Hz, while grid-connected bidirectional converter detects the grid-connected instruction that user issues, and grid-connected bidirectional converter detects simultaneously
Net switch disconnector K2 is in closed state, then current transformer stops modulation, modulates into hot standby mode, then with current source mode
Operation, into grid-connect mode, completes the process that grid-connected bidirectional converter switches from off-network mode to grid-connect mode.
Claims (2)
1. a kind of grid-connected bidirectional converter of energy-storage system and off-network two-mode method, which is characterized in that grid-connected in energy-storage system to open
The feedback signal for closing breaker is sent into grid-connected bidirectional converter by the input port of master control borad inside grid-connected bidirectional converter, when
When grid-connected switch disconnector is closed, grid-connected bidirectional converter receives the closed state feedback signal of grid-connected switch disconnector；When
When grid-connected switch disconnector disconnects, grid-connected bidirectional converter receives the off-state feedback signal of grid-connected switch disconnector；Institute
The grid-connected bidirectional converter stated is according to the grid-connected switch disconnector status feedback signal of acquisition, mains voltage signal, grid-connected two-way
The instruction that the state of dc circuit breaker and A.C. contactor inside current transformer and user issue, judges grid-connected Bidirectional variable-flow
The operational mode of device.
2. the grid-connected bidirectional converter of energy-storage system described in accordance with the claim 1 and off-network two-mode method, which is characterized in that institute
The operational mode of the grid-connected bidirectional converter of the energy-storage system stated is divided into: treating coldly machine, hot standby, off-grid operation and is incorporated into the power networks；
When grid-connected bidirectional converter detect the dc circuit breaker inside grid-connected bidirectional converter be closed, grid-connected bidirectional converter into
After entering cold standby mode, if grid-connected bidirectional converter receives the grid-connected bidirectional converter internal communication contact of closure that user issues
The instruction of device, while grid-connected bidirectional converter detects that its internal A.C. contactor is in an off state, then is closed grid-connected double
To the A.C. contactor inside current transformer, into hot standby mode；
After grid-connected bidirectional converter enters hot standby mode, if grid-connected bidirectional converter receives the modulation that user issues and refers to
It enables, while grid-connected bidirectional converter receives the grid-connected instruction that user issues, then detects grid-connected open to grid-connected bidirectional converter
When pass breaker is in closed state and normal network voltage, grid-connected bidirectional converter is modulated with current source mode and is run, into
Enter grid-connect mode；The network voltage normally refers to that the amplitude of the current grid-connected collected network voltage of bidirectional converter is no more than
The 80%-110% of voltage rating, and the frequency of network voltage is no more than 47.5Hz-52.5Hz；
After grid-connected bidirectional converter enters grid-connect mode, if grid-connected bidirectional converter detects network voltage exception, i.e. power grid
The amplitude of voltage is more than the 80%-110% of voltage rating or the frequency of network voltage is more than 47.5Hz-52.5Hz, then grid-connected
Bidirectional converter stops modulation, into hot standby mode；Detect that grid-connected switch disconnector is in disconnected to grid-connected bidirectional converter
Open state, and after receiving the off-network instruction that user issues, grid-connected bidirectional converter is modulated with voltage source mode and is run, and is entered
Off-network mode completes unplanned off-network of the grid-connected bidirectional converter at the electric network fault moment from grid-connect mode to off-network pattern switching
Process；If network voltage is normal, grid-connected bidirectional converter receives the off-network instruction that user issues, then grid-connected bidirectional converter
It needs first to remove flow of power, after grid-connected bidirectional converter operation power is 0, grid-connected bidirectional converter is with voltage source mode tune
System operation, into off-network mode, completes plan off-network process of the grid-connected bidirectional converter from grid-connect mode to off-network pattern switching；
After grid-connected bidirectional converter enters off-network mode, if grid-connected bidirectional converter detects that network voltage is normal, i.e. power grid
The amplitude of voltage is no more than the 80%-110% of voltage rating, and the frequency of network voltage is no more than 47.5Hz-52.5Hz, together
When grid-connected bidirectional converter detect the grid-connected instruction that user issues, and grid-connected bidirectional converter detects grid-connected switch open circuit
Device is in closed state, then grid-connected bidirectional converter stops modulation, into hot standby mode, then is modulated and is transported with current source mode
Row, into grid-connect mode, completes the process that grid-connected bidirectional converter switches from off-network mode to grid-connect mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811452524.9A CN109494776A (en) | 2018-11-30 | 2018-11-30 | The grid-connected bidirectional converter of energy-storage system and off-network double mode operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811452524.9A CN109494776A (en) | 2018-11-30 | 2018-11-30 | The grid-connected bidirectional converter of energy-storage system and off-network double mode operation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109494776A true CN109494776A (en) | 2019-03-19 |
Family
ID=65698949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811452524.9A Pending CN109494776A (en) | 2018-11-30 | 2018-11-30 | The grid-connected bidirectional converter of energy-storage system and off-network double mode operation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109494776A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224432A (en) * | 2019-06-13 | 2019-09-10 | 乐山一拉得电网自动化有限公司 | A kind of box-type substation and its microgrid system control method |
| CN110635472A (en) * | 2019-08-22 | 2019-12-31 | 江苏固德威电源科技股份有限公司 | Method for increasing carrying capacity of three-phase energy storage inversion system and three-phase energy storage inversion system applying same |
| CN110752615A (en) * | 2019-11-22 | 2020-02-04 | 国网湖南省电力有限公司 | Battery energy storage power station field joint debugging device and method |
| WO2021003006A1 (en) * | 2019-07-03 | 2021-01-07 | Neworld.Energy Llc | Grid-tied electric meter adapter and systems for automated power resilience and on-demand grid balancing |
| CN112952987A (en) * | 2021-03-04 | 2021-06-11 | 江西赣锋锂电科技有限公司 | Energy storage control strategy for building fire safety standby power |
| CN113644699A (en) * | 2021-08-02 | 2021-11-12 | 许继集团有限公司 | Multi-converter off-grid starting operation method and device |
| CN113765147A (en) * | 2021-11-09 | 2021-12-07 | 万帮数字能源股份有限公司 | Switching device, system and method |
| CN113890101A (en) * | 2021-10-29 | 2022-01-04 | 阳光电源（上海）有限公司 | Energy storage transformation system and control method thereof |
| CN115776130A (en) * | 2022-12-29 | 2023-03-10 | 北京索英电气技术股份有限公司 | Grid-connected and off-grid switching method, energy storage converter, energy storage system and power system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055368A (en) * | 2010-12-20 | 2011-05-11 | 江苏省电力公司南京供电公司 | 100-KVA micro-grid energy storage bidirectional converter |
| CN102185333A (en) * | 2011-04-19 | 2011-09-14 | 河南电力试验研究院 | Method for realizing on-grid and off-grid dual-mode running of dual-directional converter in micro-grid |
| CN102843060A (en) * | 2012-09-11 | 2012-12-26 | 中船重工鹏力（南京）新能源科技有限公司 | Two-level two-direction current transformer and control method thereof |
| CN104362665A (en) * | 2014-09-28 | 2015-02-18 | 北京索英电气技术有限公司 | Microgrid on-grid to off-grid switching control system and control method thereof |
| CN104426410A (en) * | 2013-08-19 | 2015-03-18 | 北京意科能源技术有限公司 | Novel dual-mode bidirectional converter device |
| CN204441905U (en) * | 2015-02-16 | 2015-07-01 | 江苏中天科技股份有限公司 | A kind of self-starting system of energy accumulation current converter |
| CN106058910A (en) * | 2016-01-13 | 2016-10-26 | 万向钱潮股份有限公司 | Energy storage inverter dual-mode seamless intelligent switching system and switching method |
-
2018
- 2018-11-30 CN CN201811452524.9A patent/CN109494776A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055368A (en) * | 2010-12-20 | 2011-05-11 | 江苏省电力公司南京供电公司 | 100-KVA micro-grid energy storage bidirectional converter |
| CN102185333A (en) * | 2011-04-19 | 2011-09-14 | 河南电力试验研究院 | Method for realizing on-grid and off-grid dual-mode running of dual-directional converter in micro-grid |
| CN102843060A (en) * | 2012-09-11 | 2012-12-26 | 中船重工鹏力（南京）新能源科技有限公司 | Two-level two-direction current transformer and control method thereof |
| CN104426410A (en) * | 2013-08-19 | 2015-03-18 | 北京意科能源技术有限公司 | Novel dual-mode bidirectional converter device |
| CN104362665A (en) * | 2014-09-28 | 2015-02-18 | 北京索英电气技术有限公司 | Microgrid on-grid to off-grid switching control system and control method thereof |
| CN204441905U (en) * | 2015-02-16 | 2015-07-01 | 江苏中天科技股份有限公司 | A kind of self-starting system of energy accumulation current converter |
| CN106058910A (en) * | 2016-01-13 | 2016-10-26 | 万向钱潮股份有限公司 | Energy storage inverter dual-mode seamless intelligent switching system and switching method |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224432A (en) * | 2019-06-13 | 2019-09-10 | 乐山一拉得电网自动化有限公司 | A kind of box-type substation and its microgrid system control method |
| US11502514B2 (en) | 2019-07-03 | 2022-11-15 | Neworld.Energy Llc | Grid-tied variable frequency facility |
| US11251613B2 (en) | 2019-07-03 | 2022-02-15 | Neworld.Energy Llc | Grid-tied variable frequency facility |
| WO2021003006A1 (en) * | 2019-07-03 | 2021-01-07 | Neworld.Energy Llc | Grid-tied electric meter adapter and systems for automated power resilience and on-demand grid balancing |
| US10916940B2 (en) | 2019-07-03 | 2021-02-09 | Neworld.Energy Llc | Grid-tied electric meter adapter and systems for automated power resilience and on-demand grid balancing |
| US10951036B2 (en) | 2019-07-03 | 2021-03-16 | Neworld.Energy Llc | Grid-tied variable frequency facility |
| US10998724B1 (en) | 2019-07-03 | 2021-05-04 | Neworld.Energy Llc | Grid-tied electric meter adapter and systems for automated power resilience and on-demand grid balancing |
| US11502515B2 (en) | 2019-07-03 | 2022-11-15 | Neworld.Energy Llc | Grid-tied variable frequency facility |
| US11108232B1 (en) | 2019-07-03 | 2021-08-31 | Neworld.Energy Llc | Grid-tied electric meter adapter and systems for automated power resilience and on-demand grid balancing |
| US11114853B2 (en) | 2019-07-03 | 2021-09-07 | Neworld.Energy Llc | Grid-tied variable frequency facility |
| US11476666B1 (en) | 2019-07-03 | 2022-10-18 | Neworld.Energy Llc | Grid-tied electric meter adapter and systems for automated power resilience and on-demand grid balancing |
| US11777311B2 (en) | 2019-07-03 | 2023-10-03 | Neworld Energy Llc | Grid-tied variable frequency facility |
| US11502513B2 (en) | 2019-07-03 | 2022-11-15 | Neworld.Energy Llc | Variable frequency facility |
| US11374406B2 (en) | 2019-07-03 | 2022-06-28 | Neworld.Energy Llc | Grid-tied electric meter adapter and systems for automated power resilience and on-demand grid balancing |
| US11251614B2 (en) | 2019-07-03 | 2022-02-15 | Neworld.Energy Llc | Grid-tied electric meter adapter and systems for automated power resilience and on-demand grid balancing |
| CN110635472A (en) * | 2019-08-22 | 2019-12-31 | 江苏固德威电源科技股份有限公司 | Method for increasing carrying capacity of three-phase energy storage inversion system and three-phase energy storage inversion system applying same |
| CN110752615B (en) * | 2019-11-22 | 2024-02-23 | 国网湖南省电力有限公司 | On-site joint debugging device and method for battery energy storage power station |
| CN110752615A (en) * | 2019-11-22 | 2020-02-04 | 国网湖南省电力有限公司 | Battery energy storage power station field joint debugging device and method |
| CN112952987A (en) * | 2021-03-04 | 2021-06-11 | 江西赣锋锂电科技有限公司 | Energy storage control strategy for building fire safety standby power |
| CN113644699B (en) * | 2021-08-02 | 2024-04-05 | 许继集团有限公司 | Multi-converter off-grid starting operation method and device |
| CN113644699A (en) * | 2021-08-02 | 2021-11-12 | 许继集团有限公司 | Multi-converter off-grid starting operation method and device |
| CN113890101A (en) * | 2021-10-29 | 2022-01-04 | 阳光电源（上海）有限公司 | Energy storage transformation system and control method thereof |
| CN113765147A (en) * | 2021-11-09 | 2021-12-07 | 万帮数字能源股份有限公司 | Switching device, system and method |
| CN115776130B (en) * | 2022-12-29 | 2024-02-02 | 北京索英电气技术股份有限公司 | Off-grid switching method, energy storage converter, energy storage system and power system |
| CN115776130A (en) * | 2022-12-29 | 2023-03-10 | 北京索英电气技术股份有限公司 | Grid-connected and off-grid switching method, energy storage converter, energy storage system and power system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109494776A (en) | The grid-connected bidirectional converter of energy-storage system and off-network double mode operation method | |
| CN107093890B (en) | A kind of flexible direct current converter station internal fault switchgear distribution and sweep-out method | |
| CN104158282B (en) | A kind of two-way switching control power circuit and high voltage converter | |
| CN104882891A (en) | Low-voltage distribution voltage-regulation equipment | |
| CN104882890B (en) | A kind of current-limiting type dynamic electric voltage recovery device and its uninterrupted power supply method | |
| CN102623994B (en) | Substation area control method and system of microgrid operation mode | |
| CN104810922A (en) | Control cabinet with electric energy management function and electric energy management method thereof | |
| CN101969227B (en) | Self-powered automatic switching and closing high-voltage control system | |
| CN103618330A (en) | Method for multi-port flexible high voltage direct current transmission system electrified connection through disconnecting switch | |
| CN203205987U (en) | Device for remote control operation of circuit breaker for power supply of motor with isolating switch | |
| CN103762612A (en) | Live access method for multi-terminal flexible direct current transmission system through disconnecting switch | |
| CN203218895U (en) | Intelligent control device for capacity-variable energy-saving preassembled transformer substation | |
| CN209526513U (en) | A kind of anti-open circuit vacuum circuit breaker of shunt resistance type | |
| CN209247896U (en) | A kind of distribution system simulation test device | |
| CN104426232A (en) | Off-grid type photovoltaic energy storage system and intelligent conversion control method | |
| CN109842204A (en) | Stand-by heat line electricity source based on optical-fibre channel controls in-put of spare power supply method | |
| CN201656548U (en) | Double-loop power supply manual throwing device capable of preventing electric dazzling | |
| CN202797977U (en) | Power electronic system combining voltage support with fault current limiting | |
| CN204668986U (en) | A kind of battery charging and discharging device | |
| CN201018314Y (en) | Microcomputer type auto-switch-on device | |
| CN103904776A (en) | Intelligent power distribution room power system | |
| CN207281229U (en) | A kind of quick feeder fault location of power automation and shielding system | |
| CN208190265U (en) | power supply system | |
| CN109921325B (en) | Switch cabinet closing locking loop | |
| CN108695972B (en) | Switching circuit, system and method for controlling power supply of power changing station, controller and medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190319 |