CN107276119A - A kind of energy accumulation current converter black-start method - Google Patents
A kind of energy accumulation current converter black-start method Download PDFInfo
- Publication number
- CN107276119A CN107276119A CN201710412166.8A CN201710412166A CN107276119A CN 107276119 A CN107276119 A CN 107276119A CN 201710412166 A CN201710412166 A CN 201710412166A CN 107276119 A CN107276119 A CN 107276119A
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- China
- Prior art keywords
- current converter
- energy accumulation
- accumulation current
- contactor
- circuit breaker
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- 238000009825 accumulation Methods 0.000 title claims abstract description 108
- 238000000034 method Methods 0.000 title claims abstract description 13
- 241001672018 Cercomela melanura Species 0.000 title claims abstract description 11
- 239000003990 capacitor Substances 0.000 claims abstract description 24
- 238000004146 energy storage Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
Classifications
-
- H02J3/382—
-
- 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
Abstract
A kind of energy accumulation current converter black-start method, the power supply of its dc circuit breaker actuating coil is provided by energy accumulation current converter AC output voltage.Close after pre-charge contactor, direct voltage source is powered by pre-charge resistance for DC capacitor.After DC capacitor voltage meets condition, start modulation, energy accumulation current converter off-grid operation, now energy accumulation current converter output AC voltage provide supply voltage for dc circuit breaker actuating coil, DC side is powered by band pre-charge resistance and pre-charge contactor series arm.Receive after the dc circuit breaker close command that user sends, dc circuit breaker closure simultaneously switches off pre-charge contactor and pre-charge resistance is cut out into current supply circuit, be that energy accumulation current converter DC side is powered by dc circuit breaker.
Description
Technical field
The present invention relates to a kind of startup method of energy accumulation current converter.
Background technology
With the extensive utilization of regenerative resource and the raising to customer power supply reliability requirement, distributed power generation and micro- electricity
Network technology is developed rapidly.In micro-grid system, energy accumulation current converter is to ensure that micro-capacitance sensor is normally run, and adjusts micro-grid power source
Can, it is ensured that the important step of load power supply quality.Energy accumulation current converter is that bidirectional energy is carried out between energy-storage system and AC network
The key equipment of transmission.In recent years, the research on energy accumulation current converter increasingly attracts attention.
Have in microgrid energy accumulation current converter as the conventional actuating coil of the dc circuit breaker of direct voltage source power switch
Two kinds of 220VAC AC startings coil and 24VDC direct currents actuating coil.The power supply of 24V direct current actuating coils is by energy storage unsteady flow
Switching Power Supply in device system is provided；220V AC startings coil is typically carried by the uninterrupted power source (UPS) in converter system
For.
Exist in the microgrid energy accumulation current converter that dc circuit breaker startup power supply is provided using UPS and automatic consumption is not used for a long time
Electricity is to feeding, so as to cause the shortcoming that UPS can not start.And in grassland, mountain top, seashore etc. more than the microgrid power station of China's layout
Remote field place, if now occurring the phenomenon that UPS Long-time Shut-downs lead to not start, due to being difficult to find in wild environment
Power supply charges for UPS, then can not close the dc circuit breaker faced in energy accumulation current converter, cause current transformer can not open machine.
The Starting mode of traditional energy accumulation current converter is as shown in Figure 1.Energy accumulation current converter self-inspection is completed, and confirms fault-free, this
When detect direct voltage source voltage more than self-starting voltage, and receive the pre-charge contactor closure that user sends and refer to
Order, then close pre-charge contactor, charged by pre-charge resistance to DC capacitor.It is more than setting value to DC capacitor voltage
Afterwards, dc circuit breaker is closed, pre-charge contactor is simultaneously switched off, the Voltage Establishment of energy accumulation current converter DC side is now completed.So
Start modulation afterwards, current transformer off-network starts, and untill now, energy accumulation current converter AC voltage is successfully established.
In this flow, once cause for the UPS that dc circuit breaker actuating coil is powered because Long-time Shut-down is fed straight
Stream breaker can not be closed, then this interruption can not be performed the flow for causing energy accumulation current converter to downwards.Therefore, carried using UPS
For there is UPS in the microgrid energy accumulation current converter of dc circuit breaker startup power supply, unused automatic power consumption to feed causes directly for a long time
The shortcoming that stream breaker can not be closed.
The content of the invention
The purpose of the present invention is the shortcoming for overcoming prior art, proposes a kind of black-start method of energy accumulation current converter.Adopting
In the energy accumulation current converter for the dc circuit breaker for being 220VAC with actuating coil supply voltage, the present invention can avoid generation direct current from breaking
Road device actuating coil power supply UPS Long-time Shut-downs cause feed, the phenomenon for causing dc circuit breaker not close.
Hardware configuration using the energy accumulation current converter of the present invention includes：Direct voltage source, pre-charge resistance, preliminary filling electrical contact
Device, dc circuit breaker, DC capacitor, energy accumulation current converter bridge circuit, LC wave filters, main contactor, grid-connected contactor and power network
Voltage source.
Direct voltage source connects direct current by pre-charge resistance series connection pre-charge contactor, or by dc circuit breaker
Hold, be DC capacitor charging.The series arm of pre-charge resistance and pre-charge contactor is in parallel with dc circuit breaker, DC voltage
Source is energy storage battery group.The rear class connection energy accumulation current converter bridge circuit of DC capacitor, after DC capacitor charging complete, energy storage
Current transformer bridge circuit can start modulation.After the rear class connection LC wave filters of energy accumulation current converter bridge circuit, LC wave filters
Level connection main contactor, is load supplying.Start the alternating voltage that energy accumulation current converter bridge circuit is exported after modulation to filter through LC
The stable three phase sine alternating voltage of device output.If now energy accumulation current converter receives the main contactor closure that user sends and referred to
Order, closes main contactor, energy accumulation current converter output voltage is transported to load end by main contactor, is load supplying.Main contact
The rear class of device connects grid-connected contactor, the rear class connection line voltage source of grid-connected contactor.After main contactor closure, if receiving
The grid-connected instruction that user sends, and line voltage is normal, then closes grid-connected contactor, energy accumulation current converter is incorporated into the power networks.
In energy accumulation current converter using the present invention, the actuating coil supply voltage of its dc circuit breaker is 220VAC；Preliminary filling
Electric contactor actuating coil supply voltage is 24VDC；The power grade of pre-charge resistance meets the impact that its off-network starts moment
The requirement of electric current.
The present invention need not increase the hardware facility of energy accumulation current converter, and the starting step for only changing energy accumulation current converter is that can be achieved
The black starting-up of energy accumulation current converter, improves the operational reliability of energy accumulation current converter on the basis of hardware cost is not increased.
The present invention is applied to the energy accumulation current converter using 220VAC coils as the dc circuit breaker of actuating coil.The present invention is opened
Dynamic method and step is as follows：
When energy accumulation current converter self-inspection is completed, confirm after fault-free, if energy accumulation current converter receives the precharge that user sends
The close command that contactor is sent, at the same energy accumulation current converter detect direct voltage source voltage more than energy accumulation current converter set from
Start voltage, then close pre-charge contactor, now direct voltage source is charged by pre-charge resistance for DC capacitor；Work as direct current
Capacitance voltage is more than the threshold value that energy accumulation current converter is set, and meets after condition, if energy accumulation current converter receives the startup that user sends
Modulation instructions, then energy accumulation current converter, which starts, modulates, energy accumulation current converter off-grid operation, and now the AC output of energy accumulation current converter is single
Phase RMS voltage is 220V alternating current, and DC side is powered by pre-charge resistance and pre-charge contactor series arm；Adopt
Startup voltage is provided for the actuating coil of dc circuit breaker with energy accumulation current converter output AC voltage, if now energy accumulation current converter connects
Dc circuit breaker close command is received, then closes dc circuit breaker, pre-charge contactor is simultaneously switched off, pre-charge resistance is cut out
Current supply circuit, is that DC side sets up voltage by dc circuit breaker.It is to avoid energy accumulation current converter band pre-charge resistance long-term simultaneously
Operation, causes pre-charge resistance to damage, it should issue time interval by what startup modulation instructions and closure dc circuit breaker were instructed
Foreshorten within 10s.
Energy accumulation current converter black-start method of the present invention, in the absence of UPS Long-time Shut-downs, causes dc circuit breaker actuating coil to supply
Electric electric power is not enough, so as to cause the situation that dc circuit breaker can not be closed.In the present invention, after closure pre-charge contactor,
Direct voltage source is powered by pre-charge resistance for DC capacitor.Met to DC capacitor voltage after condition, energy accumulation current converter is opened
Dynamic modulation off-grid operation., now energy accumulation current converter output AC voltage provides for dc circuit breaker actuating coil starts voltage, storage
Energy current transformer DC side is powered by pre-charge resistance and pre-charge contactor series arm.Energy accumulation current converter receives user's hair
After the dc circuit breaker close command gone out, dc circuit breaker is closed, pre-charge contactor is simultaneously switched off and cuts out pre-charge resistance
Current supply circuit, is that energy accumulation current converter DC side is powered by dc circuit breaker.
The effect of the present invention：
The present invention only carries out phase on the basis of energy accumulation current converter hardware facility is not increased to energy accumulation current converter starting step
The black starting-up that can be achieved with energy accumulation current converter should be changed, the development cost of energy accumulation current converter is reduced, energy storage unsteady flow is improved
Reliability.
Brief description of the drawings
Fig. 1 energy accumulation current converters tradition Starting mode flow chart；
Fig. 2 energy accumulation current converter structure charts；
The flow chart of Fig. 3 energy accumulation current converter black-start methods of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Energy accumulation current converter black-start method of the present invention can avoid, in UPS Long-time Shut-downs, causing dc circuit breaker
Actuating coil power supply electric power is not enough, so that the situation appearance for causing dc circuit breaker not close.Direct current breaks in the present invention
The power supply of road device actuating coil is provided by energy accumulation current converter AC output voltage.
Using the structure of energy accumulation current converter of the invention as shown in Fig. 2 energy accumulation current converter includes：Direct voltage source Udc, it is pre-
Charging resistor R1, pre-charge contactor K1, dc circuit breaker K2, DC capacitor C1, energy accumulation current converter bridge circuit Inv, LC filtering
Device, main contactor K3, load resistance Rload, grid-connected contactor K4, line voltage source Ug。
Direct voltage source UdcPass through pre-charge resistance R1Connect pre-charge contactor K1, or pass through dc circuit breaker K2Even
Meet DC capacitor C1, it is DC capacitor C1Charging.Pre-charge resistance R1With pre-charge contactor K1Series arm and direct current interruption
Device K2It is in parallel.Direct voltage source UdcFor energy storage battery group.Dc circuit breaker K2Actuating coil supply voltage be 220VAC.In advance
Charging contactor K1Actuating coil supply voltage be 24VDC.Pre-charge resistance R1Power grade meet its off-network start moment
Dash current requirement.DC capacitor C1Rear class meet energy accumulation current converter bridge circuit Inv, DC capacitor C1After charging complete
Energy accumulation current converter bridge circuit Inv can start modulation.Energy accumulation current converter bridge circuit Inv rear class connection LC wave filters, LC
The rear class connection main contactor K of wave filter3, for load RloadPower supply.Start energy accumulation current converter bridge circuit Inv after modulation to export
Alternating voltage through LC wave filters, export stable three phase sine alternating voltage.If now energy accumulation current converter receives user's hair
The main contactor K gone out3Close command, then close main contactor K3, energy accumulation current converter output voltage is by main contactor K3It is transported to
Load end, for load RloadPower supply.Main contactor K3Rear class connect grid-connected contactor K4, grid-connected contactor K4Rear class connection
Line voltage source Ug.Main contactor K3If grid-connected instruction is received after closure, and line voltage source UgNormally, then grid-connected contact
Device K4Closure, energy accumulation current converter is incorporated into the power networks.
The flow of energy accumulation current converter black-start method of the present invention is as shown in Figure 3.When energy accumulation current converter self-inspection is completed, nothing is confirmed
After failure, if energy accumulation current converter receives the pre-charge contactor K that user sends1Close command, is detected simultaneously by DC voltage
Source UdcVoltage is more than the self-starting voltage that energy accumulation current converter is set, then closes pre-charge contactor K1, now direct voltage source Udc
Pass through pre-charge resistance R1For DC capacitor C1Power supply；It is more than the threshold value bar that energy accumulation current converter is set when meeting DC capacitor voltage
After part, if energy accumulation current converter receives the startup modulation instructions that user sends, energy accumulation current converter bridge circuit Inv, which starts, to be adjusted
System, energy accumulation current converter off-grid operation, now energy accumulation current converter AC output single-phase RMS voltage is 220V alternating current, directly
Stream side passes through pre-charge resistance R1With pre-charge contactor K1Series arm is powered.Energy accumulation current converter output AC voltage is direct current
Breaker K2Actuating coil provide start voltage；If now receiving the dc circuit breaker K that user sends2Close command, energy storage
Current transformer then closes dc circuit breaker K2, simultaneously switch off pre-charge contactor K1, by pre-charge resistance R1Current supply circuit is cut out, is led to
Cross dc circuit breaker K2Voltage is set up for the DC side of energy accumulation current converter.To avoid energy accumulation current converter band pre-charge resistance R1For a long time
Operation, causes pre-charge resistance R1Damage, it should modulation instructions and closure dc circuit breaker K will be started2Instruction was issued between the time
Every foreshortening within 10s.
The present invention is not on the premise of energy accumulation current converter hardware facility is increased, and the starting step only to energy accumulation current converter is carried out
Processing, you can solving UPS Long-time Shut-downs feed causes the problem of dc circuit breaker can not be closed, improve energy accumulation current converter can
By property, the development cost of energy accumulation current converter is reduced.
Claims (3)
1. a kind of energy accumulation current converter black-start method, the energy accumulation current converter includes：Direct voltage source (Udc), pre-charge resistance
(R1), pre-charge contactor (K1), dc circuit breaker (K2), DC capacitor (C1), energy accumulation current converter bridge circuit (Inv), filtering
Device (LC), main contactor (K3), load resistance (Rload), grid-connected contactor (K4), and line voltage source (Ug)；Described is straight
Flow voltage source (Udc) pass through pre-charge resistance (R1) series connection pre-charge contactor (K1), or pass through dc circuit breaker (K2) connection
DC capacitor (C1), it is DC capacitor (C1) charging；Pre-charge resistance (R1) and pre-charge contactor (K1) series connection and direct current break
Road device (K2) in parallel；Direct voltage source (Udc) it is energy storage battery group；DC capacitor (C1) rear class connect energy accumulation current converter bridge-type
Circuit (Inv), the rear class connection wave filter (LC) of energy accumulation current converter bridge circuit (Inv), the rear class connection master of wave filter (LC)
Contactor (K3), for load (Rload) power supply, main contactor (K3) the grid-connected contactor (K of rear class connection4), grid-connected contactor (K4) after
Cascade gets access to grid voltage source (Ug), it is characterised in that：When described energy accumulation current converter self-inspection is completed, confirm after fault-free, if storage
Energy current transformer receives the pre-charge contactor (K that user sends1) close command, it is detected simultaneously by direct voltage source (Udc) electricity
Pressure is more than the self-starting voltage that energy accumulation current converter is set, then closes pre-charge contactor (K1), now direct voltage source (Udc) logical
Cross pre-charge resistance (R1) it is DC capacitor (C1) power supply；It is more than the threshold value that energy accumulation current converter is set when meeting DC capacitor voltage
After condition, if energy accumulation current converter receives the startup modulation instructions that user sends, energy accumulation current converter bridge circuit (Inv) starts
Modulation, energy accumulation current converter off-grid operation, now the AC output single-phase RMS voltage of energy accumulation current converter is 220V exchange
Electricity, the DC side of energy accumulation current converter passes through pre-charge resistance (R1) and pre-charge contactor (K1) series arm powers；Energy storage unsteady flow
Device bridge circuit (Inv) output AC voltage is dc circuit breaker (K2) actuating coil provide start voltage；If now receiving
Dc circuit breaker (the K sent to user2) close command, energy accumulation current converter then closes dc circuit breaker (K2), simultaneously switch off preliminary filling
Electric contactor (K1), by pre-charge resistance (R1) current supply circuit is cut out, pass through dc circuit breaker (K2) be energy accumulation current converter direct current
Voltage is set up in side.
2. according to the energy accumulation current converter black-start method described in claim 1, it is characterised in that：Described energy accumulation current converter is sent
Current transformer bridge circuit (Inv) starts modulation instructions and sends closure dc circuit breaker (K2) instruction time interval for 10s with
It is interior.
3. according to the energy accumulation current converter black-start method described in claim 1, it is characterised in that：Described energy accumulation current converter it is pre-
Start modulation after charging contactor closure, make the simple alternating current that energy accumulation current converter modulation operation output single-phase virtual value is 220V
Voltage provides supply voltage for the actuating coil of dc circuit breaker, is then closed again dc circuit breaker, while by pre-charge resistance
Direct current power supply loop is cut out with pre-charge contactor series loop.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710412166.8A CN107276119A (en) | 2017-06-02 | 2017-06-02 | A kind of energy accumulation current converter black-start method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710412166.8A CN107276119A (en) | 2017-06-02 | 2017-06-02 | A kind of energy accumulation current converter black-start method |
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| CN107276119A true CN107276119A (en) | 2017-10-20 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109802558A (en) * | 2019-03-11 | 2019-05-24 | 中天昱品科技有限公司 | A kind of soft starting system of the DC side of energy accumulation current converter and its method |
| CN114567004A (en) * | 2022-02-24 | 2022-05-31 | 江苏阿诗特能源科技有限公司 | Photovoltaic energy storage system-based black start control system and method |
| WO2022143276A1 (en) * | 2020-12-30 | 2022-07-07 | 华为数字能源技术有限公司 | Energy storage system |
| CN116742679A (en) * | 2023-08-10 | 2023-09-12 | 上海百竹成航新能源有限责任公司 | Reverse starting energy storage system and reverse starting method |
| CN117439230A (en) * | 2023-10-31 | 2024-01-23 | 广东首航智慧新能源科技有限公司 | Energy storage module and starting method thereof, energy storage system and starting method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203457068U (en) * | 2013-08-19 | 2014-02-26 | 北京意科能源技术有限公司 | Novel dual-mode bidirectional converter |
-
2017
- 2017-06-02 CN CN201710412166.8A patent/CN107276119A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203457068U (en) * | 2013-08-19 | 2014-02-26 | 北京意科能源技术有限公司 | Novel dual-mode bidirectional converter |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109802558A (en) * | 2019-03-11 | 2019-05-24 | 中天昱品科技有限公司 | A kind of soft starting system of the DC side of energy accumulation current converter and its method |
| WO2022143276A1 (en) * | 2020-12-30 | 2022-07-07 | 华为数字能源技术有限公司 | Energy storage system |
| CN114567004A (en) * | 2022-02-24 | 2022-05-31 | 江苏阿诗特能源科技有限公司 | Photovoltaic energy storage system-based black start control system and method |
| CN114567004B (en) * | 2022-02-24 | 2024-04-02 | 江苏阿诗特能源科技股份有限公司 | Black start control system and method based on photovoltaic energy storage system |
| CN116742679A (en) * | 2023-08-10 | 2023-09-12 | 上海百竹成航新能源有限责任公司 | Reverse starting energy storage system and reverse starting method |
| CN117439230A (en) * | 2023-10-31 | 2024-01-23 | 广东首航智慧新能源科技有限公司 | Energy storage module and starting method thereof, energy storage system and starting method thereof |
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