CN102723737A - Control method based on micro-grid multi-energy - Google Patents

Control method based on micro-grid multi-energy Download PDF

Info

Publication number
CN102723737A
CN102723737A CN2012102293614A CN201210229361A CN102723737A CN 102723737 A CN102723737 A CN 102723737A CN 2012102293614 A CN2012102293614 A CN 2012102293614A CN 201210229361 A CN201210229361 A CN 201210229361A CN 102723737 A CN102723737 A CN 102723737A
Authority
CN
China
Prior art keywords
microgrid
grid
micro
incorporated
starts
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.)
Granted
Application number
CN2012102293614A
Other languages
Chinese (zh)
Other versions
CN102723737B (en
Inventor
盛德刚
顾磊
魏敏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guodian Nanjing Automation Co Ltd
Original Assignee
Guodian Nanjing Automation Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guodian Nanjing Automation Co Ltd filed Critical Guodian Nanjing Automation Co Ltd
Priority to CN201210229361.4A priority Critical patent/CN102723737B/en
Publication of CN102723737A publication Critical patent/CN102723737A/en
Application granted granted Critical
Publication of CN102723737B publication Critical patent/CN102723737B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/14—District level solutions, i.e. local energy networks

Abstract

The invention relates to a control method based on micro-grid multi-energy, which is mainly used for grid control of micro-grid isolated network starting, off network operation transferring to grid connection operation and grid connection operation transferring to off network operation; when the micro-grid is started or switched, a power supply is set as a reference power supply; in the processes of micro-grid isolated network starting, off network operation transferring to grid connection operation and grid connection operation transferring to off network operation isolated network, the set reference power supply is respectively used as the reference to perform starting or switching step. The control method provided by the invention solves the selection problem of system frequency in a micro-grid system under the condition that various power supplies exist, thus, the frequency of the micro-grid system is kept stable, and the stability of the frequency of the micro-grid system can be ensured when sub-micro-grids are connected. The method provided by the invention can be used for ensuring stable operation of the micro-grid system when the micro-grid is started or switched, and the adjustment of nonlinear load and circuits by harmonic wave caused can be favored.

Description

A kind of control method based on little electrical network multipotency source
Technical field
The present invention relates to the control method in a kind of little electrical network multipotency source, specifically relate to a kind of single master control method that is mainly used in many power supplys in little grid distribution formula energy, belong to little electric power network technique field.
Background technology
In the distributed energy micro-grid system, generally have various ways power supplys such as wind-force, photovoltaic, waterpower, natural gas, diesel engine generator.System frequency is a benchmark with the Power Plant Side frequency generally in the tradition electrical network.In distribution declines electrical network, generating side in many places is arranged, the control method of traditional electrical network is not suitable for little electrical network.
In order to guarantee the stable operation of microgrid system, it is particularly important that the control strategy of power supply seems.The various control methods of present little electric network source have principal and subordinate's control strategy, reciprocity control strategy.Principal and subordinate's control strategy is very big to main power source and communication dependence, in case main power source or communication apparatus break down, will cause very big influence to the operation of system; The equity control strategy need not communication, plug and play; But steady-state error can not reach 0, and can not correctly regulate the Harmonic Distribution that nonlinear load and circuit cause.
Summary of the invention
For solving the deficiency of prior art, the present invention proposes the control method in a kind of little electrical network multipotency source, guaranteed the stable operation of distributed power source in little electrical network.
For reaching above purpose, the present invention is that the technical scheme below adopting realizes:
A kind of control method based on little electrical network multipotency source; It is characterized in that; Microgrid is all set a power supply when starting or switch be reference power supply, the lonely net of microgrid starts, change from net be incorporated into the power networks, being incorporated into the power networks leaves in the network process, is that benchmark is carried out the step that starts or switch with the reference power supply of setting respectively.
Comprise following steps:
The setting up procedure of microgrid under the lonely net state: under the lonely net state; The microgrid system at first starts diesel engine generator; When diesel engine generator normally moves, be main power source with the diesel engine generator, photovoltaic generator and/or wind-driven generator are that reference power supply generates electricity by way of merging two or more grid systems with the diesel engine generator; After this, load equipment normally starts;
The step that is incorporated into the power networks from microgrid under the net starting state: after the lonely net of microgrid starts; The microgrid system belongs to from network operation; This moment be if need be incorporated into the power networks, and is reference power supply with the electric power incoming line on netting twine road, city, and each generating equipment of microgrid is adjusted into and the operation of being incorporated into the power networks after civil power is consistent;
Be incorporated into the power networks microgrid under the starting state from the net step: after microgrid starts and is incorporated into the power networks; The microgrid system belongs to and is incorporated into the power networks, and this moment is if need from network operation, then through PCC static switch Switching power; Energy storage device starts afterwards; Is reference power supply according to field condition with diesel engine generator or energy storage device such as ultracapacitor, drives the whole network operation, and each generating equipment adjustment state is taken over said energy storage device work at last.
Said energy storage device comprises ultracapacitor, lithium battery or lead-acid battery.
Behind the PCC static switch Switching power, ultracapacitor starts in 10 milliseconds, drives whole network operation 10-60 second, during lithium battery or lead-acid battery start in succession, each generating equipment adjustment state is taken over energy storage device work at last.
Said generating equipment comprises diesel engine generator, photovoltaic generator, wind-driven generator or natural gas generator.
The beneficial effect that the present invention reached:
The control method in little electrical network multipotency of the present invention source; Be mainly used in the lonely net of little electrical network start, change from net be incorporated into the power networks, being incorporated into the power networks leaves the power grid control in the net; In the distributed energy micro-grid system, confirm main power source and be benchmark with this power supply; Making little electrical network is benchmark with the main power source when starting or switch all the time, has solved the selection problem of system frequency under the situation that multiple power supply exists in the micro-grid system, makes the microgrid system frequency keep stable; When having guaranteed that sub-microgrid is incorporated into the power networks, microgrid system frequency stable.Method of the present invention can guarantee the stable operation of microgrid system when little electrical network starts or switch, be beneficial to the harmonic wave that adjusting nonlinear load and circuit cause.
Embodiment
Further describe in the face of the present invention down.Following examples only are used for technical scheme of the present invention more clearly is described, and can not limit protection scope of the present invention with this.
Control method based on little electrical network multipotency source of the present invention may further comprise the steps:
The startup method of microgrid under the lonely net state: under the lonely net state; What the microgrid system at first started is diesel engine generator; When diesel engine generator normally moves, be main power source with the diesel engine generator, photovoltaic generator and wind-driven generator are that reference power source generates electricity by way of merging two or more grid systems with the diesel engine generator; After this, its load equipment normally starts.
From the combination method of microgrid under the net starting state: after the lonely net of microgrid started, system belonged to from network operation, and this moment be if need be incorporated into the power networks, and was standard with the electric power incoming line on netting twine road, city, and each generating equipment of microgrid is adjusted into and the operation of being incorporated into the power networks after civil power is consistent.
Be incorporated into the power networks microgrid under the starting state from network method: after microgrid starts and is incorporated into the power networks; System belongs to and is incorporated into the power networks; This moment, then through the quick Switching power of PCC static switch, ultracapacitor started in 10 milliseconds afterwards if need from network operation; Is reference power supply according to field condition with diesel engine generator or ultracapacitor; Drive whole network operation 10-60 second, during lithium battery or lead-acid battery energy storage device start in succession, each generating equipment adjustment match state finishes and takes over energy storage device work at last.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from know-why of the present invention; Can also make some improvement and distortion, these improvement and distortion also should be regarded as protection scope of the present invention.

Claims (5)

1. control method based on little electrical network multipotency source; It is characterized in that; Microgrid is all set a power supply when starting or switch be reference power supply, the lonely net of microgrid starts, change from net be incorporated into the power networks, being incorporated into the power networks leaves in the network process, is that benchmark is carried out the step that starts or switch with the reference power supply of setting respectively.
2. the control method based on little electrical network multipotency source according to claim 1 is characterized in that, comprises following steps:
The setting up procedure of microgrid under the lonely net state: under the lonely net state; The microgrid system at first starts diesel engine generator; When diesel engine generator normally moves, be main power source with the diesel engine generator, photovoltaic generator and/or wind-driven generator are that reference power supply generates electricity by way of merging two or more grid systems with the diesel engine generator; After this, load equipment normally starts;
The step that is incorporated into the power networks from microgrid under the net starting state: after the lonely net of microgrid starts; The microgrid system belongs to from network operation; This moment be if need be incorporated into the power networks, and is reference power supply with the electric power incoming line on netting twine road, city, and each generating equipment of microgrid is adjusted into and the operation of being incorporated into the power networks after civil power is consistent;
Be incorporated into the power networks microgrid under the starting state from the net step: after microgrid starts and is incorporated into the power networks; The microgrid system belongs to and is incorporated into the power networks, and this moment is if need from network operation, then through PCC static switch Switching power; Energy storage device starts afterwards; With diesel engine generator or energy storage device is reference power supply, drives the whole network operation, and each generating equipment adjustment state is taken over said energy storage device work at last.
3. the control method based on little electrical network multipotency source according to claim 2 is characterized in that said energy storage device comprises ultracapacitor, lithium battery or lead-acid battery.
4. the control method based on little electrical network multipotency source according to claim 3; It is characterized in that; Behind the PCC static switch Switching power, ultracapacitor starts in 10 milliseconds, drives whole network operation 10-60 second; Lithium battery or lead-acid battery start in succession during this time, and each generating equipment adjustment state is taken over energy storage device work at last.
5. the control method based on little electrical network multipotency source according to claim 2 is characterized in that said generating equipment is diesel engine generator, photovoltaic generator, wind-driven generator, natural gas generator or hydroelectric generator.
CN201210229361.4A 2012-07-04 2012-07-04 Control method based on micro-grid multi-energy Active CN102723737B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210229361.4A CN102723737B (en) 2012-07-04 2012-07-04 Control method based on micro-grid multi-energy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210229361.4A CN102723737B (en) 2012-07-04 2012-07-04 Control method based on micro-grid multi-energy

Publications (2)

Publication Number Publication Date
CN102723737A true CN102723737A (en) 2012-10-10
CN102723737B CN102723737B (en) 2014-07-30

Family

ID=46949435

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201210229361.4A Active CN102723737B (en) 2012-07-04 2012-07-04 Control method based on micro-grid multi-energy

Country Status (1)

Country Link
CN (1) CN102723737B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103560538A (en) * 2013-11-08 2014-02-05 东南大学 Microgrid protection and switchover integrated control method based on storing energy at PCC
CN105515209A (en) * 2016-01-28 2016-04-20 山东鲁能智能技术有限公司 Microgrid hybrid energy storage system and control method thereof
CN106953356A (en) * 2017-04-07 2017-07-14 南京邮电大学 Under a kind of island mode without energy storage wind-solar-diesel complementary electric power system and method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080169704A1 (en) * 2006-09-11 2008-07-17 Coffman Electrical Equipment Co. Advanced mobile power system
CN102170134A (en) * 2011-05-05 2011-08-31 许继集团有限公司 Microgrid synchronization and off-grid control method and seamless switching method
CN102315645A (en) * 2011-09-09 2012-01-11 中国科学院电工研究所 Energy router for distributed power generation
CN102355057A (en) * 2011-09-25 2012-02-15 国网电力科学研究院 Computer monitoring method for microgrid system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080169704A1 (en) * 2006-09-11 2008-07-17 Coffman Electrical Equipment Co. Advanced mobile power system
CN102170134A (en) * 2011-05-05 2011-08-31 许继集团有限公司 Microgrid synchronization and off-grid control method and seamless switching method
CN102315645A (en) * 2011-09-09 2012-01-11 中国科学院电工研究所 Energy router for distributed power generation
CN102355057A (en) * 2011-09-25 2012-02-15 国网电力科学研究院 Computer monitoring method for microgrid system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103560538A (en) * 2013-11-08 2014-02-05 东南大学 Microgrid protection and switchover integrated control method based on storing energy at PCC
CN103560538B (en) * 2013-11-08 2015-09-02 东南大学 Micro-capacitance sensor protection and the switching integrated control method of Based PC C place's energy storage
CN105515209A (en) * 2016-01-28 2016-04-20 山东鲁能智能技术有限公司 Microgrid hybrid energy storage system and control method thereof
CN105515209B (en) * 2016-01-28 2017-09-22 山东鲁能智能技术有限公司 A kind of micro-capacitance sensor mixed energy storage system and its control method
CN106953356A (en) * 2017-04-07 2017-07-14 南京邮电大学 Under a kind of island mode without energy storage wind-solar-diesel complementary electric power system and method

Also Published As

Publication number Publication date
CN102723737B (en) 2014-07-30

Similar Documents

Publication Publication Date Title
CN108736500B (en) Optimized tripping method and device for regional power grid surplus power direct current delivery system
CN103560538B (en) Micro-capacitance sensor protection and the switching integrated control method of Based PC C place's energy storage
CN104882906A (en) Distributed micro-grid black-start control system and method based on photovoltaic and energy storage
CN101552462A (en) Black-start method
CN102427226A (en) Optimization method for safety and stability control measure of multi-direct-current power system
Katiraei et al. Planned islanding on rural feeders—utility perspective
Alatrash et al. Enabling large-scale PV integration into the grid
CN105226657B (en) A kind of series-parallel comprehensive compensation device administered for power distribution network low-voltage
CN104218568A (en) Power grid black-start method with participation of regional small hydropower stations and new energy hybrid micro-grids
CN105098775A (en) Micro-grid voltage stabilizing and controlling method and system
WO2015096519A1 (en) Method for paralleling power grid black-start subsystem having external support
CN102723737B (en) Control method based on micro-grid multi-energy
CN205123280U (en) Topological structure of wind -powered electricity generation field, step up controlling means and system
CN104392275A (en) Planning method for active power distribution network comprising distributed photovoltaic grid-connected network
CN103580052A (en) Compound energy storage power station for active distribution network and power distribution method of compound energy storage power station
CN103532224A (en) Method for configuring UPS (uninterrupted power supply) in offshore wind plant
CN104078970B (en) The network-building method of dual power supply commutation system DC side networking operation
CN203607862U (en) A diesel generator parallel connection control system
CN108376997A (en) A kind of probabilistic active power distribution network isolated island division methods of consideration distributed generation resource
DE202011102374U1 (en) Energy storage and / or supply device
CN204905877U (en) Mountain area low voltage distribution system with reactive compensation function
Miller et al. Energy storage can enable wider deployment of distributed generation
CN104578123B (en) A kind of micro-grid system control method for improving robustness
CN204761029U (en) Connect electric system temporarily with phase shifting transformer
CN202978407U (en) Double-power-supply switching control circuit

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant