CN108054775A - A kind of microgrid control method - Google Patents
A kind of microgrid control method Download PDFInfo
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- CN108054775A CN108054775A CN201711348211.4A CN201711348211A CN108054775A CN 108054775 A CN108054775 A CN 108054775A CN 201711348211 A CN201711348211 A CN 201711348211A CN 108054775 A CN108054775 A CN 108054775A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000004146 energy storage Methods 0.000 claims abstract description 39
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 230000005611 electricity Effects 0.000 claims description 31
- 238000010248 power generation Methods 0.000 claims description 22
- 230000007812 deficiency Effects 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 3
- 230000009931 harmful effect Effects 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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- H02J3/383—
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
-
- 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
-
- H02J3/386—
-
- 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
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a kind of microgrid control method, this method monitors power grid in real time including (1) piconet controller；(2) when detecting electric network fault, honourable power prediction is carried out, according to real-time honourable power prediction value and battery capacity, carries out classification load control；Simultaneously wind light generation is controlled to enter off-grid operation pattern；If wind light generation is insufficient, control energy-storage battery electric discharge；(3) when detecting power system restoration, control wind light generation enters grid-connect mode operation, and charges to energy storage；Recover load supplyings at different levels simultaneously；(4) piconet controller adjusts operational mode in time by monitoring wind light generation, maintains power-balance of the power supply with load, inhibits power swing with reference to energy storage, wind light generation fluctuation is avoided to generate harmful effect to power grid.The present invention realizes and off-network pattern automatically switches, and control is coordinated in photovoltaic, wind turbine, energy storage, and power grid operation, power supply is reliable and stable, and power quality is met the requirements；Sufficient battery capacity, can deal with emergency case.
Description
Technical field
The present invention relates to a kind of microgrid control method more particularly to a kind of microgrid controls applied to steel tower base station micro-capacitance sensor
Method.
Background technology
Present Global energy-saving and emission-reduction, energy security huge challenge under, photovoltaic, wind-force, biomass, combustion will be greatly developed
Useful supplement of the distributed power generation mode as centralization power generation including material battery etc., so can not only reduce power transmission
When power loss and by the expense brought of power distribution network upgrading, and for user bring relatively low expense, it is higher can
By property, preferable power quality, higher energy utilization rate and independence.
Distributed generation resource needs the management and control of rational energy, and the development in domestic and international presently relevant field is also relatively more slow
Slowly, achievement and actual effect are all smaller, and tremendous development and application implementation also need to more study.There are wind in intelligent micro-grid
The disturbing sources such as power power generation, solar energy power generating, diversity load at any time can in power distribution station, feeder line and substation's outlet
There are various forms of power swings.
Micro-capacitance sensor based on steel tower base station communication has its particularity, it is necessary to meet the requirement of steel tower base station micro-capacitance sensor：1st, supply
Electricity is reliable, stablize, power quality is met the requirements；2nd, to ensure sufficient battery capacity, deal with emergency case；3rd, multichannel is accurate
Metering, meets the efficiency to become more meticulous and accounting management；4th, load rating controls；5th, the automatic switchover of grid-connect mode, off-network pattern,
Photovoltaic, wind turbine, the coordination control of energy storage, can realize off-network stable operation.
The content of the invention
Goal of the invention：In view of the above problems, the present invention proposes a kind of microgrid controlling party applied to steel tower base station micro-capacitance sensor
Method.
Technical solution：Purpose to realize the present invention, the technical solution adopted in the present invention are：A kind of microgrid controlling party
Method, including step：
(1) piconet controller monitors power grid in real time；
(2) when detecting electric network fault, honourable power prediction is carried out, according to real-time honourable power prediction value and battery electricity
Amount carries out classification load control；Simultaneously wind light generation is controlled to enter off-grid operation pattern；If wind light generation is insufficient, control storage
It can battery discharge；
(3) when detecting power system restoration, control wind light generation enters grid-connect mode operation, and charges to energy storage；It is extensive simultaneously
Multiple load supplyings at different levels；
(4) piconet controller monitoring wind light generation, adjusts operational mode in time, maintains the power-balance of power supply and load,
Inhibit power swing with reference to energy storage.
Photovoltaic generation flow includes step：
(1) during irradiation deficiency, supplied and loaded by power grid；
(2) when irradiation meets inverter startup condition, photovoltaic generation powering load；
(3) when photovoltaic power generation quantity is more than load electricity consumption, charge to energy-storage battery；
(4) when energy-storage battery is full of, remaining photovoltaic electricity is counter in the form of remaining electricity online to give power grid.
Wind-power electricity generation flow includes step：
(1) during wind-force deficiency, supplied and loaded by power grid；
(2) when wind speed reaches threshold wind velocity, wind turbine power generation charges to energy-storage battery；
(3) when energy-storage battery is full of, surplus generation powering load；
(4) remaining capacity is counter in the form of remaining electricity online gives power grid；
(5) when controller of fan voltage is more than 60V, wind-driven generator brake stops power generation.
Microgrid spatial load forecasting process includes step：
(1) when distributed new power generation is more than all bearing powers of microgrid, piconet controller controls extra electricity to storage
It can charge；
(2) distributed new power generation is more than all bearing powers of microgrid, and when energy storage is full of, piconet controller control light
It lies prostrate inverter and reduces power output, power generation is maintained to be balanced with electric power；
(3) distributed new power generation is less than bearing power, and during alternating current power-off, piconet controller control load switch,
Cut-out three-level loads, while piconet controller control energy-storage units are contributed, and maintain bearing power steady；
(4) distributed new power generation is less than bearing power, and energy storage uses more than 50%, and when alternating current does not recover yet, it is micro-
Net controller controls cut-out secondary loads, retains important load, while notifies maintenance personnel.
Advantageous effect：The present invention realizes load rating control, and off-network pattern automatically switches, photovoltaic, wind turbine, energy storage association
Regulation and control system, power grid operation, power supply is reliable and stable, and power quality is met the requirements；Sufficient battery capacity, can deal with burst
Situation.
Description of the drawings
Fig. 1 is and off-network switches schematic diagram；
Fig. 2 is photovoltaic generation schematic diagram；
Fig. 3 is wind-power electricity generation schematic diagram；
Fig. 4 is microgrid spatial load forecasting process schematic.
Specific embodiment
Technical scheme is further described with reference to the accompanying drawings and examples.
The present invention is applied to the microgrid control method of steel tower base station micro-capacitance sensor, comprises the following steps：
(1) piconet controller monitors power grid in real time；
(2) as shown in Figure 1, when piconet controller detects electric network fault, piconet controller is according to real-time honourable power
Predicted value and battery capacity, judgement can undertake bearing power, cut away unnecessary load, carry out classification load supplying；It controls simultaneously
Photovoltaic generation, wind-power electricity generation enter off-grid operation pattern, if wind-power electricity generation, photovoltaic generation not enough load use, control energy storage
Battery is contributed.
Under abnormal and fault condition, the preferential safe and reliable power supply for ensureing important load, can to reduce fault incidence
Rapid sub-load of cutting away ensures microgrid energy balance.Consider regenerative resource consumption, meeting allows to pass through in power bracket
Adjust energy storage charge and discharge strategy and optimization load electricity consumption strategy, regenerative resource maximum output.Primary goal is important load
Safe and reliable power supply, improves the safety and reliability of electricity consumption, and all scheduling need to check security.
(3) as shown in Fig. 2, when piconet controller detects power system restoration, piconet controller control photovoltaic generation, wind-force
Power generation is run into grid-connect mode, and is charged to energy storage；Recover load supplyings at different levels simultaneously.
As shown in figure 3, the flow of photovoltaic generation, specifically includes following steps：
(1) during irradiation deficiency, alternating current is for load；
(2) when irradiation meets inverter startup requirement, photovoltaic system starts to generate electricity, preferential powering load；
(3) when photovoltaic generation is more than load, charge to energy storage；
(4) it is counter in the form of remaining electricity online to give power grid when energy-storage battery is full of, and photovoltaic generation still has residue.
As shown in figure 4, the flow of wind-power electricity generation, specifically includes following steps：
(1) during wind-force deficiency, alternating current is for load；
(2) after wind speed reaches threshold wind velocity, wind-driven generator starts to generate electricity, and preferentially charges to energy-storage system；
(3) if battery is full of, surplus generation charges to load；
(4) it is counter in the form of remaining electricity online to send alternating current if still there is residue；
(5) if controller of fan voltage is more than 60V, wind-driven generator brake stops power generation.
When the grid collapses, important load power supply is preferentially ensured, micro-capacitance sensor enters the state of emergency, storages at different levels at this time
Energy, distributed generation resource and load respond rapidly to emergency control policy, if necessary the autonomous operation of off-grid.In general, primary mesh
Mark is the safe and reliable power supply of important load, should ensure that important load possesses the power supply point of 2 or 2 or more.
To improve the economy of the whole network operation, in network load peak phase, regenerative resource maximum output, energy storage uses
Discharge mode controls load electricity consumption；In the network load ebb period, energy storage uses charge mode, the abundant accumulation of energy of system.
(4) piconet controller can maintain power supply by monitoring wind-force, photovoltaic generation output to adjust operational mode in time
With the power-balance of load, inhibit power swing with reference to energy storage, wind-force, photovoltaic generation fluctuation is avoided to generate bad shadow to power grid
It rings.
(5) by the control method, can realize the safe and stable operation of micro-capacitance sensor, can realize micro-capacitance sensor simultaneously, off-network
The steady switching of state.
To improve power supply quality, the switching of micro-capacitance sensor operational modal is taken seamless switching, is estimated by power grid cognition technology
Following operation of power networks trend, reduces switching times to the greatest extent.
As shown in figure 4, microgrid spatial load forecasting process includes step：
(1) when wind-force, the generation of electricity by new energy of photovoltaic distributed are more than all bearing powers of microgrid, piconet controller can be with
Extra electricity is controlled to charge to energy storage；
(2) it is micro- when wind-force, the generation of electricity by new energy of photovoltaic distributed are more than all bearing powers of microgrid, and energy storage is full of
Net controller can control photovoltaic DC-to-AC converter to reduce power output, and power generation is maintained to be balanced with electric power；
(3) when wind-force, the generation of electricity by new energy of photovoltaic distributed are less than bearing power, and alternating current powers off, piconet controller
Control load switch, cut-out three-level load (i.e. the environmental loads such as air-conditioning, illumination), while piconet controller control energy storage list
Member is contributed, and maintains bearing power steady；
(4) when wind-force, the generation of electricity by new energy of photovoltaic distributed are less than bearing power, energy storage uses more than 50%, and alternating current
When not recovering yet, piconet controller control cut-out secondary loads only retain communication apparatus important load, while pass through fortune
Dimension APP notifies maintenance personnel, carries Portable diesel generator and does the standby energy.
Claims (4)
1. a kind of microgrid control method, it is characterised in that：Including step：
(1) piconet controller monitors power grid in real time；
(2) when detecting electric network fault, honourable power prediction is carried out, according to real-time honourable power prediction value and battery capacity, into
Row classification load control；Simultaneously wind light generation is controlled to enter off-grid operation pattern；If wind light generation is insufficient, energy-storage battery is controlled
Electric discharge；
(3) when detecting power system restoration, control wind light generation enters grid-connect mode operation, and charges to energy storage；Recover simultaneously each
Grade load supplying；
(4) piconet controller monitoring wind light generation, adjusts operational mode in time, maintains the power-balance of power supply and load, with reference to
Energy storage inhibits power swing.
2. microgrid control method according to claim 1, it is characterised in that：Photovoltaic generation flow includes step：
(1) during irradiation deficiency, supplied and loaded by power grid；
(2) when irradiation meets inverter startup condition, photovoltaic generation powering load；
(3) when photovoltaic power generation quantity is more than load electricity consumption, charge to energy-storage battery；
(4) when energy-storage battery is full of, remaining photovoltaic electricity is counter in the form of remaining electricity online to give power grid.
3. microgrid control method according to claim 1, it is characterised in that：Wind-power electricity generation flow includes step：
(1) during wind-force deficiency, supplied and loaded by power grid；
(2) when wind speed reaches threshold wind velocity, wind turbine power generation charges to energy-storage battery；
(3) when energy-storage battery is full of, surplus generation powering load；
(4) remaining capacity is counter in the form of remaining electricity online gives power grid；
(5) when controller of fan voltage is more than 60V, wind-driven generator brake stops power generation.
4. microgrid control method according to claim 1, it is characterised in that：Microgrid spatial load forecasting process includes step：
(1) when distributed new power generation is more than all bearing powers of microgrid, piconet controller controls extra electricity to be filled to energy storage
Electricity；
(2) distributed new power generation is more than all bearing powers of microgrid, and when energy storage is full of, piconet controller control photovoltaic is inverse
Become device and reduce power output, power generation is maintained to be balanced with electric power；
(3) distributed new power generation is less than bearing power, and during alternating current power-off, piconet controller control load switch, excision
Part three-level load, while piconet controller control energy-storage units are contributed, and maintain bearing power steady；
(4) distributed new power generation is less than bearing power, and energy storage uses more than 50%, and when alternating current does not recover yet, microgrid control
Device processed controls cut-out secondary loads, retains important load, while notifies maintenance personnel.
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| CN201711348211.4A CN108054775A (en) | 2017-12-15 | 2017-12-15 | A kind of microgrid control method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492500A (en) * | 2019-09-11 | 2019-11-22 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | A kind of load dispatching method, device, electronic equipment and storage medium |
| CN111082507A (en) * | 2019-12-27 | 2020-04-28 | 北京双登慧峰聚能科技有限公司 | Hybrid power supply system and hybrid power supply method for 5G base station |
| CN111276960A (en) * | 2019-05-13 | 2020-06-12 | 中国矿业大学 | Energy storage module prediction control method in light-storage direct current micro-grid system |
| CN111404197A (en) * | 2020-03-11 | 2020-07-10 | 国网辽宁省电力有限公司大连供电公司 | Method for island microgrid control strategy in grid-connected operation |
| FR3104843A1 (en) * | 2019-12-11 | 2021-06-18 | Electricite De France | Micro-grid with a sophisticated balance between consumption and production |
| CN113268527A (en) * | 2021-05-27 | 2021-08-17 | 中清能绿洲科技股份有限公司 | Intelligent photovoltaic energy storage scheduling analysis method and device, server and storage medium |
| CN114362243A (en) * | 2021-12-10 | 2022-04-15 | 江苏镇安电力设备有限公司 | Battery charging control method for micro-grid system |
| CN115378015A (en) * | 2022-09-07 | 2022-11-22 | 上海玫克生储能科技有限公司 | Method, system, device and medium for controlling operation of microgrid |
| CN117977664A (en) * | 2024-04-02 | 2024-05-03 | 国网山东省电力公司诸城市供电公司 | Micro-grid energy storage control system, method, equipment and medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111276960A (en) * | 2019-05-13 | 2020-06-12 | 中国矿业大学 | Energy storage module prediction control method in light-storage direct current micro-grid system |
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| CN111082507A (en) * | 2019-12-27 | 2020-04-28 | 北京双登慧峰聚能科技有限公司 | Hybrid power supply system and hybrid power supply method for 5G base station |
| CN111404197A (en) * | 2020-03-11 | 2020-07-10 | 国网辽宁省电力有限公司大连供电公司 | Method for island microgrid control strategy in grid-connected operation |
| CN113268527A (en) * | 2021-05-27 | 2021-08-17 | 中清能绿洲科技股份有限公司 | Intelligent photovoltaic energy storage scheduling analysis method and device, server and storage medium |
| CN114362243A (en) * | 2021-12-10 | 2022-04-15 | 江苏镇安电力设备有限公司 | Battery charging control method for micro-grid system |
| CN115378015A (en) * | 2022-09-07 | 2022-11-22 | 上海玫克生储能科技有限公司 | Method, system, device and medium for controlling operation of microgrid |
| CN115378015B (en) * | 2022-09-07 | 2023-09-05 | 上海玫克生储能科技有限公司 | Operation control method, system, equipment and medium of micro-grid |
| CN117977664A (en) * | 2024-04-02 | 2024-05-03 | 国网山东省电力公司诸城市供电公司 | Micro-grid energy storage control system, method, equipment and medium |
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Inventor after: Tang Ping Inventor after: Liang Xun Inventor before: Pei Chunchuan Inventor before: Liang Xun Inventor before: Gu Yongsheng Inventor before: Yu Caijin |
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Application publication date: 20180518 |