CN109494796A - A kind of light stores up network control method on the invariable power of micro-grid system - Google Patents
A kind of light stores up network control method on the invariable power of micro-grid system Download PDFInfo
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- CN109494796A CN109494796A CN201811431114.6A CN201811431114A CN109494796A CN 109494796 A CN109494796 A CN 109494796A CN 201811431114 A CN201811431114 A CN 201811431114A CN 109494796 A CN109494796 A CN 109494796A
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- 238000004146 energy storage Methods 0.000 claims abstract description 91
- 230000005611 electricity Effects 0.000 claims abstract description 12
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- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
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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
- H02J3/28—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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- 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
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- 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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- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A kind of light stores up network control method on the invariable power of micro-grid system, and after consideration photovoltaic generating system generated output meets micro-grid system internal loading electricity consumption first, whether generated output has residue;Secondly consider energy storage system storage battery residual capacity situation, consider whether photovoltaic generating system dump power meets invariable power online demand again.There is residue after photovoltaic generating system generated output meets the electricity consumption of micro-grid system internal loading and invariable power online, while energy storage system storage battery is in a saturated state, photovoltaic generating system limits Power operation, and energy-storage system is standby;If photovoltaic generating system dump power is unsatisfactory for invariable power online demand, energy-storage system investment;When energy storage system storage battery residual capacity is inadequate, photovoltaic generating system charges to energy-storage system.When photovoltaic generating system generated output is unsatisfactory for micro-grid system internal loading demand, the operation of photovoltaic generating system maximum power, energy-storage system combination remaining battery capacity situation investment.
Description
Technical field
The present invention relates to network control methods on a kind of invariable power of light storage micro-grid system.
Background technique
In light storage micro-grid system, since photovoltaic power generation is influenced by ambient temperature and intensity of illumination, output has fluctuation
Property, randomness, determine that energy-storage system needs to implement control energy and power output, maintain supply and demand in light storage micro-grid system flat
Weighing apparatus.The present invention makes full use of each distributed generation resource characteristic, finds effective power coordination control method, can maximumlly meet
Micro-grid system internal loading and invariable power online demand, realize effective management of output power.
CN 201510656707 " a kind of method and system of distributed generation grid-connected point power control ", discloses one kind
Distributed generation grid-connected point Poewr control method: when distributed generation resource is distributed light storage control, grid entry point power control mode
It include: grid-connected not limit control model, peak load shifting control model, control model of generating power for their own use and dispatching of power netwoks response control mould
Formula.Wherein dispatching of power netwoks response control mode be adjust energy-storage battery charge-discharge electric power and photovoltaic power generation power output so that with
Family meets the dispatch command that power grid is assigned with the power that exchanges of power grid, but does not provide specific control method and process.In addition, existing
The control method for other the most of light-preserved systems having all concentrates on the control such as peak load shifting and smooth power, on invariable power
The specific control method of net, which rarely has, to be referred to.
Summary of the invention
The purpose of the present invention is overcoming the prior art, network control on a kind of invariable power of light storage micro-grid system is proposed
Method processed.
When bulk power grid has invariable power scheduling requirement, using light storage micro-grid system of the invention in addition to meeting load power supply
Outside, moreover it is possible to meet requirement of the scheduling to micro-capacitance sensor online power.The present invention makes full use of each distributed generation resource characteristic, control spirit
It is living, it realizes simple.
Technical scheme is as follows:
It include photovoltaic generating system, energy-storage system and load using light storage micro-grid system of the invention.
Network control method on the invariable power of light storage micro-grid system of the present invention, first consideration photovoltaic generating system generated output
After meeting micro-grid system internal loading electricity consumption, whether generated output has residue;Secondly consider energy storage system storage battery residual capacity
Situation, considers whether photovoltaic generating system dump power meets invariable power online demand again.It is specific as follows:
1, while having residue after photovoltaic generating system generated output meets micro-grid system internal loading electricity consumption, consider storage
Whether energy system remaining battery capacity is in a saturated state:
When energy storage system storage battery residual capacity is in a saturated state, i.e. remaining battery capacity SOC is more than or equal to electric power storage
Pond residual capacity saturation threshold SOC1, if power has a residue after the online of photovoltaic generating system invariable power, i.e. net load Pnet and
The difference of invariable power online setting value is greater than 0, and photovoltaic generating system is on meeting micro-grid system load power and invariable power at this time
Power operation is limited after net power demand, the generated output output valve of photovoltaic generating system is invariable power online setting value and load function
The difference of rate, energy-storage system are standby;If the dump power of photovoltaic generating system is unsatisfactory for invariable power online demand, i.e. net load
The difference of Pnet and invariable power online setting value is less than 0, and photovoltaic generating system is run with maximum power, at this time energy storage system discharges,
Meet invariable power online demand, energy-storage system charge-discharge electric power is the difference of net load and invariable power online setting value, reaches electric discharge
Energy-storage system is standby after blanking voltage;
When energy storage system storage battery residual capacity unsaturation, i.e. remaining battery capacity SOC is surplus less than or equal to battery
Covolume amount unsaturation threshold value SOC2, if power has residue, i.e. net load Pnet and perseverance after the online of photovoltaic generating system invariable power
The difference of power online setting value is greater than 0, and photovoltaic generating system is meeting micro-grid system load power and invariable power online at this time
After power, surplus power charges to energy-storage system.After energy-storage system is full of, photovoltaic generating system limits Power operation, energy-storage system
Charge-discharge electric power is the difference of net load and invariable power online setting value.If photovoltaic generating system dump power is unsatisfactory for invariable power
Online demand, the operation of photovoltaic generating system maximum power, while energy storage system discharges meet invariable power online demand, reach electric discharge
Blanking voltage Uth1, energy-storage system is out of service.Battery discharge cut-off voltage Uth1It is determined by battery characteristics.
Determine energy storage system storage battery remaining capacity saturation threshold SOC1 and battery remaining capacity unsaturation threshold value SOC2
When, stagnant ring need to be designed, i.e., so that battery remaining capacity saturation threshold SOC1 and battery remaining capacity unsaturation threshold value SOC2
Certain threshold difference interval is kept, to prevent frequent switching between adjacent states.
2, when photovoltaic generating system generated output is unsatisfactory for micro-grid system internal loading demand, photovoltaic generating system is with most
High-power operation.When energy-storage system residual capacity abundance, energy-storage system is put into, is met on micro-grid system load and invariable power
Net demand, the power P if net load Pnet and invariable power are surfed the InternetCONWhen less than energy-storage system rated power, i.e. net load Pnet and
Invariable power online setting value PCONThe sum of be less than energy-storage system rated power Ppcs_rate, then energy-storage system charge-discharge electric power is net negative
The difference of lotus and invariable power online setting value;The power P if net load Pnet and invariable power are surfed the InternetCONMore than or equal to energy-storage system volume
When determining power, then energy-storage system charge power is energy-storage system rated power Ppcs_rate.When energy-storage system residual capacity deficiency,
Energy-storage system jumps to automatic charging mode, is charged by power grid to energy storage system storage battery.
Detailed description of the invention
Fig. 1 light of the present invention stores up micro-capacitance sensor topology schematic diagram;
Fig. 2 invariable power online control flow chart.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and detailed description.
As shown in Figure 1, light storage micro-capacitance sensor topology schematic diagram of the invention is as follows:
Light stores up micro-grid system 101 and is mainly made of photovoltaic generating system 102, energy-storage system 103 and load 104, system
By 105 United Dispatching management of Energy Management System when operation, invariable power online control grid entry point is PCC node 106.Institute of the present invention
The light storage micro-grid system stated is grid type micro-grid system.
The present invention is as follows to network control method on the invariable power of light storage micro-grid system:
The power flow direction positive direction of regulation light storage each provenance of micro-grid system first is as shown in Figure 1.Provide photovoltaic power generation system
The positive direction of system 102, energy-storage system 103 and load 104 is to flow to power grid, is positive, i.e. the power generation of photovoltaic generating system 102 is
Just, energy storage system discharges are positive, and charging is negative, and load electricity consumption is negative.All calculating are both needed on the basis of this positive direction when control
It carries out.
Light store up micro-grid system invariable power surf the Internet control when, first consideration photovoltaic generating system generated output meet it is micro-
After network system internal loading electricity consumption, whether generated output has residue;Secondly consider energy storage system storage battery residual capacity situation, then
Whether secondary consideration photovoltaic generating system dump power meets invariable power online demand.Specific control flow is as shown in Figure 2.
Used input quantity in following light storage micro-grid system controls are as follows: photovoltaic generating system instantaneous power Ppv, photovoltaic
Electricity generation system rated power Ppv_rate, load power PR, energy-storage system rated power Ppcs_rate, remaining battery capacity SOC, store
Battery remaining power saturation threshold SOC1, remaining battery capacity unsaturation threshold value SOC2, battery discharge cut-off voltage Uth1、
Invariable power online setting value PCON;Output quantity is photovoltaic generating system power given value Ppv_set, photovoltaic generating system switching on and shutting down refer to
Enable Ppv_start, energy-storage system charge-discharge electric power given value Ppcs_set, energy-storage system switching on and shutting down instruct Ppcs_start, energy-storage system waits for
Machine instructs Ppcs_wait.Wherein remaining battery capacity saturation threshold SOC1, remaining battery capacity unsaturation threshold value SOC2, electric power storage
Tank discharge blanking voltage Uth1It is determined by the characteristic of battery.The switching on and shutting down of photovoltaic DC-to-AC converter instruct Ppv_startValue be 1 indicate open
The switching on and shutting down of machine, photovoltaic DC-to-AC converter instruct Ppv_startValue be 0 indicate shutdown.Energy-storage system switching on and shutting down instruct Ppcs_startValue
Indicate that booting, energy-storage system switching on and shutting down instruct P for 1pcs_startValue 0 indicate shutdown.Standby command Ppcs_waitValue be 1 indicate
It is standby.
Step of the invention is as follows:
The net load Pnet for calculating light storage micro-grid system first, is preferentially generated electricity using photovoltaic generating system, i.e., photovoltaic is sent out
Electric system switching on and shutting down instruct Ppv_startValue is 1, meets micro-grid load demand, therefore net load is that photovoltaic generation power satisfaction is negative
Remaining load power after lotus demand, i.e. net load Pnet are photovoltaic generating system instantaneous power PpvWith bearing power PRThe sum of.
(1) there are residue, i.e. net load after photovoltaic generating system generated output meets micro-grid system internal loading electricity consumption
When Pnet >=0, determine to operate in next step further according to energy storage system storage battery remaining capacity situation.
When energy storage system storage battery residual capacity is in a saturated state, i.e. remaining battery capacity SOC is more than or equal to electric power storage
Pond residual capacity saturation threshold SOC1, SOC >=SOC1, if power has residue after the online of photovoltaic generating system invariable power, i.e., only
The difference of load Pnet and invariable power online setting value is greater than 0, Pnet-PCON> 0, photovoltaic generating system is meeting micro-capacitance sensor system at this time
Power operation is limited after system load power and invariable power online power demand, the generated output output valve of photovoltaic generating system is
Ppv_set=PCON-PR, energy-storage system is standby, i.e. Ppcs_waitValue is 1;If the dump power of photovoltaic generating system is unsatisfactory for permanent function
Rate online demand, i.e. net load PnetDifference with invariable power online setting value is less than 0, Pnet-PCON< 0, photovoltaic generating system is with most
High-power operation, i.e. Ppv_set=Ppv_rate, energy storage system discharges, i.e. P at this timepcs_startValue is 1, meets invariable power online need
It asks, energy-storage system charge-discharge electric power is Ppcs_set=Pnet-PCON, energy-storage system is standby after reaching discharge cut-off voltage, i.e.,
Ppcs_waitValue is 1;
When energy storage system storage battery residual capacity unsaturation, i.e. remaining battery capacity SOC is surplus less than or equal to battery
Covolume amount unsaturation threshold value SOC2, SOC≤SOC2, it is if power has residue after the online of photovoltaic generating system invariable power, i.e., net negative
Lotus PnetIt is greater than 0, P with the difference of invariable power online setting valuenet-PCON> 0, photovoltaic generating system is to meet micro-grid system negative at this time
After lotus power and invariable power online power, surplus power charges to energy-storage system.After energy-storage system is full of, photovoltaic generating system limit
Power operation, energy-storage system charge-discharge electric power are Ppcs_set=Pnet-PCON.If photovoltaic generating system dump power is unsatisfactory for perseverance
Power online demand, i.e. Pnet-PCON< 0, the operation of photovoltaic generating system maximum power, i.e. Ppv_set=Ppv_rate, while energy storage system
System electric discharge meets invariable power online demand, reaches discharge cut-off voltage Uth1, energy-storage system is out of service.The cut-off of electric power storage tank discharge
Voltage Uth1It is determined by battery characteristics.
Determine energy storage system storage battery remaining capacity saturation threshold SOC1 and battery remaining capacity unsaturation threshold value SOC2
When, stagnant ring need to be designed, i.e., so that battery remaining capacity saturation threshold SOC1 and battery remaining capacity unsaturation threshold value SOC2
Certain threshold difference interval is kept, to prevent frequent switching between adjacent states.
(2) when photovoltaic generating system generated output is unsatisfactory for micro-grid system internal loading demand, i.e. net load Pnet<0
When, photovoltaic generating system is run with maximum power, i.e. Ppv_set=Ppv_rate.When energy-storage system residual capacity abundance, energy storage system
System investment meets micro-grid system load and invariable power online demand, if net load PnetWith invariable power online power PCONIt is small
When energy-storage system rated power, i.e. net load PnetWith invariable power online setting value PCONThe sum of be less than energy-storage system rated power
Ppcs_rate, Pnet+PCON<Ppcs_rate, then energy-storage system charge-discharge electric power is Ppcs_set=Pnet-PCON;If net load PnetWith
Invariable power online power PCONWhen more than or equal to energy-storage system rated power, then Pnet+PCON≥Ppcs_rate, then energy-storage system charge and discharge
Electrical power is Ppcs_set=Ppcs_rate.When energy-storage system residual capacity deficiency, energy-storage system jumps to automatic charging mode, by
Power grid charges to energy storage system storage battery.
Claims (2)
1. network control method on a kind of invariable power of light storage micro-grid system, consideration photovoltaic generating system generated output is full first
After sufficient micro-grid system internal loading electricity consumption, whether generated output has residue;Secondly consider energy storage system storage battery residual capacity feelings
Condition, considers whether photovoltaic generating system dump power meets invariable power online demand again, it is characterized in that: on the invariable power
Steps are as follows for network control method:
(1) while remaining after meeting micro-grid system internal loading electricity consumption when photovoltaic generating system generated output, consider energy storage
System remaining battery capacity situation:
When energy storage system storage battery residual capacity is in a saturated state, i.e. remaining battery capacity SOC is surplus more than or equal to battery
Covolume amount saturation threshold SOC1, if power has residue, i.e. net load P after the online of photovoltaic generating system invariable powernetAnd invariable power
The difference for setting value of surfing the Internet is greater than 0, and photovoltaic generating system is meeting micro-grid system load power and invariable power online power at this time
Afterwards, Power operation is limited, energy-storage system is standby;If photovoltaic generating system dump power is unsatisfactory for invariable power online demand, i.e., only
Load PnetDifference with invariable power online setting value is less than 0, the operation of photovoltaic generating system maximum power, at this time energy storage system discharges,
Meet invariable power online demand, energy-storage system is standby after reaching discharge cut-off voltage;
When energy storage system storage battery residual capacity unsaturation, i.e. remaining battery capacity SOC holds less than or equal to battery residue
Unsaturated threshold value SOC2 is measured, if power has residue, i.e. net load P after the online of photovoltaic generating system invariable powernetOn invariable power
The difference of net setting value be greater than 0, at this time photovoltaic generating system meet micro-grid system load power and invariable power online power after,
Surplus power charges to energy-storage system, and after energy-storage system is full of, photovoltaic generating system limits Power operation, energy-storage system charge and discharge electric work
Rate is the difference of net load and invariable power online setting value;If photovoltaic generating system dump power is unsatisfactory for invariable power, online is needed
It asks, the operation of photovoltaic generating system maximum power, while energy storage system discharges meet invariable power online demand, reaches electric discharge cut-off electricity
Press Uth1, energy-storage system is out of service;
(2) when photovoltaic generating system generated output is unsatisfactory for micro-grid system internal loading demand, photovoltaic generating system maximum work
Rate operation;When energy-storage system residual capacity abundance, energy-storage system is put into, meets micro-grid system load and invariable power online need
It asks, if net load PnetWith invariable power online power PCONWhen less than energy-storage system rated power, i.e. net load PnetAnd invariable power
Surf the Internet setting value PCONThe sum of be less than energy-storage system rated power Ppcs_rate, then energy-storage system charge-discharge electric power is net load and perseverance
The difference of power online setting value;If net load PnetWith invariable power online power PCONMore than or equal to energy-storage system rated power
When, then energy-storage system charge power is energy-storage system rated power Ppcs_rate.When energy-storage system residual capacity deficiency, energy storage system
System jumps to automatic charging mode, is charged by power grid to energy storage system storage battery.
2. network control method on the invariable power of light storage micro-grid system as described in claim 1, it is characterized in that: determining energy storage system
When system battery remaining capacity saturation threshold SOC1 and battery remaining capacity unsaturation threshold value SOC2, stagnant ring need to be designed, even if
Battery remaining capacity saturation threshold SOC1 and battery remaining capacity unsaturation threshold value SOC2 is kept between certain threshold difference
Every to prevent frequent switching between adjacent states.
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CN110661289A (en) * | 2019-09-26 | 2020-01-07 | 深圳天顺智慧能源科技有限公司 | Microgrid system grid-connected operation control method and device and microgrid system |
CN110855006A (en) * | 2019-12-02 | 2020-02-28 | 许继电气股份有限公司 | Distributed light storage and charging regulation and control system based on edge Internet of things agent |
CN111130105A (en) * | 2020-01-09 | 2020-05-08 | 珠海格力电器股份有限公司 | Electric equipment control method and device based on constant limit power and control equipment |
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CN110855006B (en) * | 2019-12-02 | 2023-08-08 | 许继电气股份有限公司 | Distributed optical storage and charging regulation and control system based on edge internet of things agent |
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CN115207984A (en) * | 2021-04-09 | 2022-10-18 | 正泰集团研发中心(上海)有限公司 | Power distribution method of micro-grid system and micro-grid system |
CN115207984B (en) * | 2021-04-09 | 2024-06-04 | 正泰集团研发中心(上海)有限公司 | Power distribution method of micro-grid system and micro-grid system |
CN112952883A (en) * | 2021-04-22 | 2021-06-11 | 国网甘肃省电力公司电力科学研究院 | Charging control method and system of distributed energy storage system |
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