CN110460101A - Island microgrid energy storage subsystem and control method - Google Patents
Island microgrid energy storage subsystem and control method Download PDFInfo
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- CN110460101A CN110460101A CN201910834992.0A CN201910834992A CN110460101A CN 110460101 A CN110460101 A CN 110460101A CN 201910834992 A CN201910834992 A CN 201910834992A CN 110460101 A CN110460101 A CN 110460101A
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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
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
-
- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
This application provides a kind of island microgrid control system and control method, island microgrid control system includes energy storage subsystem, photovoltaic subsystem, wind-powered electricity generation subsystem, controller, diesel-driven generator, the first power distribution cabinet, the second power distribution cabinet and load；Energy accumulation current converter in energy storage subsystem is connect with battery management system, and battery management system is connected with battery pack, and energy accumulation current converter and battery management system are connect with controller；Photovoltaic array in photovoltaic subsystem is connect with photovoltaic DC-to-AC converter；Wind machine array in wind-powered electricity generation subsystem is connect with blower inverter；Photovoltaic DC-to-AC converter and blower inverter are connect with controller；Energy accumulation current converter, photovoltaic DC-to-AC converter and blower inverter are connect with the first power distribution cabinet, and the first power distribution cabinet and diesel-driven generator are connect with the second power distribution cabinet；Load is connect by ammeter with controller.The application can balance wind light generation and energy storage, provide continual and steady power supply for the load on island.
Description
Technical field
The application belongs to energy storage control technology field, and in particular to a kind of island microgrid energy storage subsystem control method.
Background technique
There is a large amount of island in China, and 500 square metres of area or more of island just have 6536, and traditional island power supply is all
Diesel-driven generator provides.In recent years, the generated energy of diesel-driven generator was increasingly difficult to meet the needs of users, long-term diesel transport
It is also very big with the expense of consumption.In addition, countries in the world are all since non-renewable energy is increasingly depleted and environment for human survival is worsening
Using the new renewable energy of exploitation as the direction of energy development.Solar energy and wind energy are a kind of inexhaustible
Renewable energy, micro-capacitance sensor industry rapidly developed in recent years, can using solar photovoltaic generation system and wind generator system
Realize the self-sufficient of island power supply.However, one side solar photovoltaic generation system and wind generator system can not mention at any time
For continual and steady power supply, another aspect diesel-driven generator difficulty in starting.Present inventor has found in R&D process, is
It solves the above problems, needs to be equipped with energy storage subsystem.On the one hand energy storage subsystem can balance wind light generation, on the other hand
It can be used as backup power source.In order to provide good island microgrid, the control of energy storage subsystem plays most important wherein
Effect.
Summary of the invention
To be overcome the problems, such as present in the relevant technologies at least to a certain extent, this application provides a kind of island microgrids
Control system and control method.
According to the embodiment of the present application in a first aspect, this application provides a kind of island microgrid control systems comprising
Energy storage subsystem, photovoltaic subsystem, wind-powered electricity generation subsystem, controller, diesel-driven generator, the first power distribution cabinet, the second power distribution cabinet and negative
It carries；
The energy storage subsystem includes energy accumulation current converter, battery management system and battery pack；The energy accumulation current converter and electricity
The connection of pond communication, the battery management system are connected with battery pack, and the battery management system will acquire described
The status information of battery pack is sent to the energy accumulation current converter, and the energy accumulation current converter is according to the status information pair of the battery pack
Battery carries out protectiveness charge and discharge, and the energy accumulation current converter and battery management system are connect with the controller；
The photovoltaic subsystem includes photovoltaic array and photovoltaic DC-to-AC converter, and the photovoltaic array is connect with photovoltaic DC-to-AC converter；
The wind-powered electricity generation subsystem includes wind machine array and blower inverter, and the wind machine array is connect with blower inverter；The photovoltaic
Inverter and blower inverter are connect with the controller；
The energy accumulation current converter, photovoltaic DC-to-AC converter and blower inverter are connect with first power distribution cabinet, and described first
Power distribution cabinet and diesel-driven generator are connect with second power distribution cabinet；The load is connect by ammeter with the controller；Institute
The first power distribution cabinet is stated for island microgrid system with electricity output and protection, second power distribution cabinet is used for the diesel generation
Machine and island microgrid system match electricity output and protection.
It further include operator in above-mentioned island microgrid control system, the operator is connect with controller, by described
The instruction of operator input control, the control instruction is for controlling the charging and discharging state of the battery pack.
Further include wireless network card in above-mentioned island microgrid control system, the controller by the wireless network card with
External mobile intelligent terminal is communicated.
According to the second aspect of the embodiment of the present application, present invention also provides a kind of island microgrid control method, packets
Include following steps:
Generated energy is sent to controller by photovoltaic DC-to-AC converter and blower inverter, and controller obtains the electricity consumption loaded on island
Amount；
The electricity consumption loaded on the generated energy received and island is compared by controller；If generated energy is greater than electricity consumption
Amount then determines that the generated energy of photovoltaic subsystem and wind-powered electricity generation subsystem is sufficient；Otherwise, it is determined that photovoltaic subsystem and wind-powered electricity generation subsystem
Generated energy is insufficient；
When the generated energy abundance of photovoltaic subsystem and wind-powered electricity generation subsystem, controller control starting photovoltaic subsystem and wind-powered electricity generation
Subsystem, photovoltaic subsystem and wind-powered electricity generation subsystem pass through powering load；Controller controls energy storage subsystem with V/f mode fortune
Row；
When the generated energy deficiency of photovoltaic subsystem and wind-powered electricity generation subsystem, controller controls photovoltaic subsystem and wind-powered electricity generation subsystem
System powering load, while controller control energy storage subsystem is discharged with V/f mode and supplements the electricity consumption of load.
It is described when the controller control energy storage subsystem is with V/f mode operation in above-mentioned island microgrid control method
Battery pack is in charged state, and the SOC of battery pack is finally made to be maintained at 30%~90%.
Further, when the controller control energy storage subsystem is with V/f mode operation, controller obtains battery pack
SOC, and judge whether the SOC of battery pack reaches 90%；
If the SOC of battery pack reaches 90%, controller limits the generated energy of photovoltaic subsystem and wind-powered electricity generation subsystem, and
Control energy storage subsystem is charged with 5% pair of battery pack of the maximum power value of battery pack under V/f mode, until being finally charged to
The blanking voltage of battery request；
If the SOC of battery pack is not up to 90%, controller controls energy storage subsystem with the battery pack under V/f mode
Normal power charges to battery pack, until being finally charged to the blanking voltage of battery request.
Further, when generated energy is less than the electricity consumption of load, and is greater than the 50% of the electricity consumption loaded, the control
Device controls energy storage subsystem with the electricity consumption of V/f mode electric discharge supplement load.
Further, when the electricity consumption that the controller control energy storage subsystem is loaded with V/f mode electric discharge supplement, control
Whether device obtains the SOC of battery pack, and judge the SOC of battery pack less than 30%；
If the SOC of battery pack, less than 30%, controller exports alarm signal, and starts diesel-driven generator, light is controlled
Lie prostrate subsystem, wind-powered electricity generation subsystem and energy storage subsystem independent operating；
If the SOC of battery pack is greater than or equal to 30%, and the generated energy of photovoltaic subsystem and wind-powered electricity generation subsystem is promoted to
50% or more of electricity consumption is loaded, then controller exports standby signal, and controls diesel-driven generator closing, and control and switch to light
Lie prostrate subsystem, wind-powered electricity generation subsystem and the operation of energy storage subsystem.
Further, when the SOC of battery pack is restored to 70% or more, controller control energy storage subsystem shutdown is simultaneously defeated
Standby signal out closes diesel-driven generator, and controls and switch to photovoltaic subsystem, wind-powered electricity generation subsystem and the operation of energy storage subsystem.
According to the third aspect of the embodiment of the present application, present invention also provides a kind of computer storage mediums comprising meter
Calculation machine program, the computer program are executed by processor, to complete island microgrid control method described in any of the above embodiments
In the step.
According to the above-mentioned specific embodiment of the application it is found that at least having the advantages that the application passes through in sea
Energy storage subsystem, photovoltaic subsystem, wind-powered electricity generation subsystem, diesel-driven generator are set in the micro grid control system of island, pass through controller
Coordinated control photovoltaic subsystem, the power generation of wind-powered electricity generation subsystem and diesel-driven generator and energy storage subsystem, photovoltaic subsystem, wind
The power supply of electronic system and diesel-driven generator can balance wind light generation and energy storage, provide and continue surely for the load on island
Fixed power supply.
It is to be understood that above-mentioned general description and following specific embodiments are merely illustrative and illustrative, not
The range to be advocated of the application can be limited.
Detailed description of the invention
Following appended attached drawing is a part of the description of the present application, appended attached it illustrates embodiments herein
The principle for describing to be used to illustrate the application together of figure and specification.
Fig. 1 is a kind of structural schematic diagram for island microgrid control system that the application specific embodiment provides.
Fig. 2 is a kind of flow chart for island microgrid control method that the application specific embodiment provides.
Detailed description of the invention:
1, energy storage subsystem；11,PCS；12,BMS；13, battery pack；
2, photovoltaic subsystem；21, photovoltaic array；22, photovoltaic DC-to-AC converter；
3, wind-powered electricity generation subsystem；31, wind machine array；32, blower inverter；
4, controller；5, diesel-driven generator；6, the first power distribution cabinet；7, the second power distribution cabinet；8, it loads；9, interchanger；10, electric
Table；20, operator.
Specific embodiment
For the purposes, technical schemes and advantages of the embodiment of the present application are more clearly understood, below will with attached drawing and in detail
Narration clearly illustrates the spirit of content disclosed herein, and any skilled artisan is understanding teachings herein
After embodiment, when the technology that can be taught by teachings herein, it is changed and modifies, without departing from the essence of teachings herein
Mind and range.
Illustrative embodiments of the present application and the description thereof are used to explain the present application, but is not intended as the restriction to the application.
In addition, in the drawings and embodiments the use of element/component of same or like label is for representing same or like portion
Point.
About " first " used herein, " second " ... etc., not especially censure the meaning of order or cis-position,
It is non-to limit the application, only for distinguish with same technique term description element or operation.
About direction term used herein, such as: upper and lower, left and right, front or rear etc. are only the sides with reference to attached drawing
To.Therefore, the direction term used is intended to be illustrative and not intended to limit this creation.
It is open term, i.e., about "comprising" used herein, " comprising ", " having ", " containing " etc.
Mean including but not limited to.
About it is used herein " and/or ", including any of the things or all combination.
It include " two " and " two or more " about " multiple " herein；It include " two groups " about " multiple groups " herein
And " more than two ".
About term used herein " substantially ", " about " etc., to modify it is any can with the quantity of slight change or
Error, but this slight variations or error can't change its essence.In general, slight change or mistake that such term is modified
The range of difference can be 20% in some embodiments, in some embodiments can be 10%, in some embodiments can for 5% or
It is other numerical value.It will be understood by those skilled in the art that the aforementioned numerical value referred to can be adjusted according to actual demand, not as
Limit.
It is certain to describe the word of the application by lower or discuss in the other places of this specification, to provide art technology
Personnel's guidance additional in relation to the description of the present application.
As shown in Figure 1, this application provides a kind of island microgrid control systems comprising energy storage subsystem 1, photovoltaic
System 2, wind-powered electricity generation subsystem 3, controller 4, diesel-driven generator 5, the first power distribution cabinet 6, the second power distribution cabinet 7 and load 8.
Energy storage subsystem 1 includes PCS11 (Power Conversion System, energy accumulation current converter), BMS12
(Battery Management System, battery management system) and battery pack 13.
PCS11 and BMS12 is communicated to connect, and BMS12 is connect with battery pack 13, the state for the battery pack 13 that BMS12 will acquire
Information is sent to PCS11.PCS11 carries out protectiveness charge and discharge to battery according to the status information of battery pack 13, it is ensured that battery peace
It runs entirely.PCS11 and BMS12 passes through interchanger 9 and connect with controller 4.
Photovoltaic subsystem 2 includes photovoltaic array 21 and photovoltaic DC-to-AC converter 22, and photovoltaic array 21 is connect with photovoltaic DC-to-AC converter 22.
Wind-powered electricity generation subsystem 3 includes wind machine array 31 and blower inverter 32, and wind machine array 31 is connect with blower inverter 32.
Photovoltaic DC-to-AC converter 22 and blower inverter 32 are connect with controller 4.
PCS11, photovoltaic DC-to-AC converter 22 and blower inverter 32 are connect with the first power distribution cabinet 6.First power distribution cabinet 6 and diesel oil
Generator 5 is connect with the second power distribution cabinet 7.
Load 8 is connect by ammeter 10 with controller 4.
First power distribution cabinet 6 matches electricity output and protection for island microgrid system, and the second power distribution cabinet 7 is used for diesel generation
Machine 5 and island microgrid system match electricity output and protection.
Under normal condition, energy storage subsystem 1, photovoltaic subsystem 2 and wind-powered electricity generation subsystem 3 pass sequentially through 6 He of the first power distribution cabinet
Second power distribution cabinet 7 gives load 8 power supply.
Specifically, energy storage subsystem 1, photovoltaic subsystem 2 and wind-powered electricity generation subsystem 3 are connect by bus with controller 4, with
Bus protocol realizes both-way communication.
Operator 20 is additionally provided in the application island microgrid control system, operator 20 connect with controller 4, passes through
Operator 20 can be instructed with input control, and the control instruction is for controlling the charging and discharging state of battery pack 13.By right
The adjusting to 1 output voltage of energy storage subsystem is realized in the control of the charging and discharging state of battery pack 13.Specifically, operator 20 wraps
Include but be not limited to touch screen, keyboard, button etc..
Island microgrid control system provided by the present application has self-diagnostic function, is in particular in: 1) startup self-detection: being
When system is powered, internal system self diagnosis software detects hardware crucial in system and control software one by one, once detection
It can't pass, just show warning message over the display, and show trouble location, only the whole positive normal open of startup self-detection project
It crosses, system, which just enters, operates normally preparation state.2) real time self-diagnosis: when digital control system is run, at any time to internal system, servo
Other external device (ED)s of system, I/O interface and numerical control device carry out automatic test-based examination, and show off status information.Such as
Fruit detection is problematic, then shows alarm signal and alarm content immediately, and automatically decide whether that stopping acts according to nature of trouble
Or it shuts down.3) fault self-diagnosis: the failures such as communication with the outside world interruption, abnormal, the analog acquisition exception of internal communication are carried out certainly
Diagnosis, and monitoring system can be reported to.Output signal is passed through 485 buses and cable by controller 4, using in MODBUS agreement
Report extremely monitoring system.
Preset wireless network card in island microgrid control system provided by the present application, controller 4 by wireless network card with
External mobile intelligent terminal (for example, mobile phone and tablet computer etc.) is communicated.For example, number can be sent to corresponding cell-phone number
According to realize SMS prompt facility；The application island microgrid control system can also be inquired using remote supervisory and control(ling) equipment
Operating parameter, to realize remote data monitoring function.
Protocol conversion module is set in island microgrid control system provided by the present application, and protocol conversion module is for providing
Data conversion in system between communication network and wide area network realizes that data interconnection can by gateway of internet of things and Cloud Server
Sea island micro-grid information is sent in cloud platform and is shown.
In some extreme environments, for example, the generated energy and energy storage subsystem 1 of photovoltaic subsystem 2 and wind-powered electricity generation subsystem 3
Electricity be not enough to when band dynamic load 8 is run or the micro-grid systems such as 4 failure of controller, power distribution cabinet failure, system overhaul
When failure, diesel-driven generator 5 gives load 8 power supply by the second power distribution cabinet 7.The peak temperature coefficient of photovoltaic array 21 is -0.38
~0.44%/DEG C between, temperature is higher, and the generated energy of photovoltaic module is lower.Theoretically, temperature is every increases once, photovoltaic array
21 lower power production 0.44% or so.
Based on the above island microgrid control system, as shown in Fig. 2, present invention also provides a kind of controls of island microgrid
Method comprising following steps:
Generated energy is sent to controller 4 by S1, photovoltaic DC-to-AC converter 22 and blower inverter 32, and controller 4 passes through ammeter 10
Obtain the electricity consumption of load 8 on island.
The electricity consumption loaded on the generated energy received and island is compared by S2, controller 4；
If generated energy is greater than electricity consumption, then it represents that the generated energy of photovoltaic subsystem 2 and wind-powered electricity generation subsystem 3 is sufficient；Otherwise,
Indicate that the generated energy of photovoltaic subsystem 2 and wind-powered electricity generation subsystem 3 is insufficient.
S3, when the generated energy abundance of photovoltaic subsystem 2 and wind-powered electricity generation subsystem 3, controller 4 pass through the first power distribution cabinet 6 control
System starting photovoltaic subsystem 2 and wind-powered electricity generation subsystem 3, photovoltaic subsystem 2 and wind-powered electricity generation subsystem 3 pass through the first power distribution cabinet 6 and second
Power distribution cabinet 7 gives load 8 power supply；Digital output modul signal is sent to PCS11 by interchanger 9 by controller 4, and PCS11 is according to connecing
The digital output modul signal control energy storage subsystem 1 received is with V/f mode operation.Wherein, V/f mode is output voltage and frequency
Directly proportional control model, i.e. U/F=K, K are constant, and U indicates that output voltage, F indicate frequency.
Further, when energy storage subsystem 1 is with V/f mode operation, battery pack 13 is in charged state, finally makes electricity
The SOC of pond group 13 is maintained at 30%~90%.The SOC for the battery pack 13 that BMS12 will test is sent to controller 4.Wherein,
SOC indicates battery charge state, is also remaining capacity, representative be battery can discharge electricity amount and its fully charged state electricity
Ratio, commonly use percentage indicate.
Controller 4 judges whether the SOC of battery pack 13 reaches 90%.
If the SOC of battery pack 13 reaches 90%, controller 4 is by reducing the revolving speed of blower and switching off several groups of photovoltaics
The mode of array 21 limits the generated energy of photovoltaic subsystem 2 and wind-powered electricity generation subsystem 3.
Controller 4 controls energy storage subsystem 1 with 5% pair of battery pack 13 of the maximum power value of battery pack 13 under V/f mode
It charges, until being finally charged to the blanking voltage of battery request.
If the SOC of battery pack 13 is not up to 90%, controller 4 controls energy storage subsystem 1 with the battery under V/f mode
The normal power of group 13 charges to battery pack 13, until being finally charged to the blanking voltage of battery request.
S4, when the generated energy deficiency of photovoltaic subsystem 2 and wind-powered electricity generation subsystem 3, controller 4 control 2 He of photovoltaic subsystem
Wind-powered electricity generation subsystem 3 gives load 8 power supply by the first power distribution cabinet 6 and the second power distribution cabinet 7, while controlling energy storage subsystem 1 with V/f mould
The electricity consumption of formula electric discharge supplement load 8.
Specifically, when generated energy be less than load 8 electricity consumption, and be greater than load 8 electricity consumption 50% when, controller 4
It is communicated by interchanger 9 with PCS11, PCS11 carries out protectiveness electric discharge to the battery in battery pack 13, that is, loads 8 and lack
Electricity by energy storage subsystem 1 electric discharge supplement.
Whether controller 4 judges the SOC of battery pack 13 less than 30%.
If the SOC of battery pack 13, less than 30%, controller 4 exports alarm signal, and by cutting in the second power distribution cabinet 7
Switching is changed to low-grade location, starts diesel-driven generator 5, controller 4 is respectively corresponded through photovoltaic DC-to-AC converter 22, blower inverter
32 and PCS11 controls photovoltaic subsystem 2,1 independent operating of wind-powered electricity generation subsystem 3 and energy storage subsystem.Under this operating condition, photovoltaic subsystem
Not to 8 power supplies are loaded, what photovoltaic subsystem 2 and wind-powered electricity generation subsystem 3 issued lacks for system 2, wind-powered electricity generation subsystem 3 and energy storage subsystem 1
Electric energy is measured all to energy storage.
If the SOC of battery pack 13 is greater than or equal to 30%, and the generated energy of photovoltaic subsystem 2 and wind-powered electricity generation subsystem 3 mentions
50% or more of 8 electricity consumptions of load is risen to, then controller 4 exports standby signal (for example, green light), and controller 4 controls diesel oil
Generator 5 is closed, and the switch in the first power distribution cabinet 6 is resetted, wherein the switch in the first power distribution cabinet 6 is for switching diesel oil hair
Motor 5 and photovoltaic subsystem 2, wind-powered electricity generation subsystem 3 and energy storage subsystem 1.
When the SOC judgement energy storage electricity emptying by monitoring energy storage subsystem 1, photovoltaic subsystem 2, wind-powered electricity generation cannot achieve
When system 3 and energy storage subsystem 1 start, controller 4 starts diesel-driven generator 5 and switches the switch in the second power distribution cabinet 7 to low
Gear, entire sea island micro-grid system downrating.Maintenance switch closure, diesel-driven generator 5 provides a small amount of electricity, in order to right
Photovoltaic subsystem 2, wind-powered electricity generation subsystem 3 and energy storage subsystem 1 carry out starting maintenance.
When the SOC of battery pack 13 is restored to 70% or more, controller 4 controls energy storage subsystem 1 and shuts down and export prompt
Signal (for example, green light) closes diesel-driven generator 5, and the switch in the second power distribution cabinet 7 is resetted, and disconnects maintenance switch.
After stable, controller 4 exports on-off model, control starting photovoltaic subsystem 2 and wind-powered electricity generation subsystem 3, light
It lies prostrate subsystem 2, wind-powered electricity generation subsystem 3 and energy storage subsystem 1 and restores normal power supply.
In the exemplary embodiment, the embodiment of the present application also provides a kind of computer storage mediums, are computer-readable
Storage medium, it may for example comprise the memory of computer program, above-mentioned computer program can be executed by processor, aforementioned to complete
The step in island microgrid control method.
Above-mentioned the embodiment of the present application can be implemented in various hardware, Software Coding or both combination.For example, this Shen
Embodiment please can also be the execution above method in data signal processor (Digital Signal Processor, DSP)
Program code.The application can also refer to computer processor, digital signal processor, microprocessor or field-programmable gate array
Arrange the multiple functions that (Field Programmable Gate Array, FPGA) is executed.Above-mentioned processing can be configured according to the application
Device executes particular task, and machine-readable software code or the firmware generation of the ad hoc approach of the application announcement are defined by executing
Code is completed.Software code or firmware code can be developed as different program languages and different formats or form.Can also be
Different target platform composing software codes.However, executing software code and the other types configuration generation of task according to the application
Different code pattern, type and the language of code do not depart from spirit herein and range.
The foregoing is merely the schematical specific embodiments of the application, before not departing from the conceptions and principles of the application
It puts, the equivalent changes and modifications that any those skilled in the art is made, should belong to the range of the application protection.
Claims (10)
1. a kind of island microgrid control system, which is characterized in that including energy storage subsystem, photovoltaic subsystem, wind-powered electricity generation subsystem,
Controller, diesel-driven generator, the first power distribution cabinet, the second power distribution cabinet and load；
The energy storage subsystem includes energy accumulation current converter, battery management system and battery pack；The energy accumulation current converter and cell tube
System communication connection is managed, the battery management system is connected with battery pack, the battery that the battery management system will acquire
The status information of group is sent to the energy accumulation current converter, and the energy accumulation current converter is according to the status information of the battery pack to battery
Protectiveness charge and discharge are carried out, the energy accumulation current converter and battery management system are connect with the controller；
The photovoltaic subsystem includes photovoltaic array and photovoltaic DC-to-AC converter, and the photovoltaic array is connect with photovoltaic DC-to-AC converter；It is described
Wind-powered electricity generation subsystem includes wind machine array and blower inverter, and the wind machine array is connect with blower inverter；The photovoltaic inversion
Device and blower inverter are connect with the controller；
The energy accumulation current converter, photovoltaic DC-to-AC converter and blower inverter are connect with first power distribution cabinet, first distribution
Cabinet and diesel-driven generator are connect with second power distribution cabinet；The load is connect by ammeter with the controller；Described
One power distribution cabinet matches electricity output and protection for island microgrid system, second power distribution cabinet for the diesel-driven generator and
Island microgrid system matches electricity output and protection.
2. island microgrid control system according to claim 1, which is characterized in that it further include operator, the operation
Device is connect with controller, is instructed by the operator input control, and the control instruction is for the charge and discharge to the battery pack
Electricity condition is controlled.
3. island microgrid control system according to claim 1, which is characterized in that it further include wireless network card, the control
Device processed is communicated by the wireless network card with external mobile intelligent terminal.
4. a kind of island microgrid control method, which comprises the following steps:
Generated energy is sent to controller by photovoltaic DC-to-AC converter and blower inverter, and controller obtains the electricity consumption loaded on island；
The electricity consumption loaded on the generated energy received and island is compared by controller；If generated energy is greater than electricity consumption,
Then determine that the generated energy of photovoltaic subsystem and wind-powered electricity generation subsystem is sufficient；Otherwise, it is determined that the hair of photovoltaic subsystem and wind-powered electricity generation subsystem
Not enough power supply；
When the generated energy abundance of photovoltaic subsystem and wind-powered electricity generation subsystem, controller control starting photovoltaic subsystem and wind-powered electricity generation subsystem
System, photovoltaic subsystem and wind-powered electricity generation subsystem pass through powering load；Controller controls energy storage subsystem with V/f mode operation；
When the generated energy deficiency of photovoltaic subsystem and wind-powered electricity generation subsystem, controller control photovoltaic subsystem and wind-powered electricity generation subsystem are given
Load supplying, while controller control energy storage subsystem is discharged with V/f mode and supplements the electricity consumption of load.
5. island microgrid control method according to claim 4, which is characterized in that the controller controls energy storage subsystem
When system is with V/f mode operation, the battery pack is in charged state, and the SOC of battery pack is finally made to be maintained at 30%~90%.
6. island microgrid control method according to claim 5, which is characterized in that the controller controls energy storage subsystem
When system is with V/f mode operation, controller obtains the SOC of battery pack, and judges whether the SOC of battery pack reaches 90%；
If the SOC of battery pack reaches 90%, controller limits the generated energy of photovoltaic subsystem and wind-powered electricity generation subsystem, and controls
Energy storage subsystem is charged with 5% pair of battery pack of the maximum power value of battery pack under V/f mode, until being finally charged to battery
It is required that blanking voltage；
If the SOC of battery pack is not up to 90%, controller controls energy storage subsystem with the normal of the battery pack under V/f mode
Power charges to battery pack, until being finally charged to the blanking voltage of battery request.
7. island microgrid control method according to claim 5, which is characterized in that when generated energy is less than the electricity consumption of load
When measuring, and being greater than the 50% of the electricity consumption loaded, the controller control energy storage subsystem is discharged with V/f mode supplements load
Electricity consumption.
8. island microgrid control method according to claim 7, which is characterized in that the controller controls energy storage subsystem
When the electricity consumption that system is loaded with V/f mode electric discharge supplement, controller obtains the SOC of battery pack, and judges whether the SOC of battery pack is small
In 30%；
If the SOC of battery pack, less than 30%, controller exports alarm signal, and starts diesel-driven generator, control photovoltaic
System, wind-powered electricity generation subsystem and energy storage subsystem independent operating；
If the SOC of battery pack is greater than or equal to 30%, and the generated energy of photovoltaic subsystem and wind-powered electricity generation subsystem is promoted to load
50% or more of electricity consumption, then controller exports standby signal, and controls diesel-driven generator closing, and controls and switch to photovoltaic
System, wind-powered electricity generation subsystem and the operation of energy storage subsystem.
9. island microgrid control method according to claim 8, which is characterized in that when the SOC of battery pack is restored to
When 70% or more, standby signal is shut down and exported to controller control energy storage subsystem, closes diesel-driven generator, and control and switch to
Photovoltaic subsystem, wind-powered electricity generation subsystem and the operation of energy storage subsystem.
10. a kind of computer storage medium, which is characterized in that including computer program, the computer program is held by processor
Row, to complete the step in the described in any item island microgrid control methods of claim 4~9.
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Application publication date: 20191115 |