CN106026168B - The energy management strategies of honourable energy storage wisdom energy tower - Google Patents
The energy management strategies of honourable energy storage wisdom energy tower Download PDFInfo
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Classifications
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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
- H02J3/382—Dispersed generators the generators exploiting renewable energy
- H02J3/383—Solar energy, e.g. photovoltaic energy
-
- 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
-
- 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
- H02J3/382—Dispersed generators the generators exploiting renewable energy
- H02J3/386—Wind energy
-
- 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
Abstract
The invention discloses the energy management strategies of honourable energy storage wisdom energy tower, belong to the technical field of microgrid energy storage, more particularly to the technical field of electric vehicle rechargeable energy management, for the energy management in wisdom energy tower between micro-capacitance sensor and energy storage device, by five kinds of control models to maintain power-balance in energy tower, realize the stable power-supplying of energy tower, extra output can also be fed back when meeting loading demand to power generating network, must extend the service life of energy storage device as far as possible on the basis of maintaining power-balance in pyramid of energy.
Description
Technical field
The invention discloses the energy management strategies of honourable energy storage wisdom energy tower, belong to the technical field of microgrid energy storage,
More particularly to the technical field of electric vehicle rechargeable energy management.
Background technology
Micro-capacitance sensor realizes the integration operation of distributed generation resource and load, neatly can access and cut out power distribution network,
Meet requirement of the user for power quality and power supply reliability, is also provided for the comprehensive utilization of regenerative resource a kind of effective
Technological means.But the high permeability of regenerative resource so that the ability that micro-capacitance sensor bears disturbance is relatively weak, especially exists
Under islet operation pattern, system may face higher risk.Therefore, it is necessary to carry out rational energy for micro-capacitance sensor feature
Scheduling, under the premise of ensuring security of system and reliability, to realize economical operation.
Optimal Operation Model is established for centralized control type micro-capacitance sensor to realize the scheme of energy scheduling, and not accounting for can be again
The randomness and intermittence of the raw energy, it is difficult to meet the actual motion requirement of micro-capacitance sensor, and not provide complete microgrid energy
Dispatching method.To overcome this defect, consideration distributed energy treatment characteristic and power supply and demand balance characteristic to establish constraints,
It establishes after power grid mathematical model and object function is solved by optimization algorithm, and then determine energy scheduling scheme, calculation amount is larger, energy
Buret reason is inefficient.
The world today for consciousness of gradually having got into the mainstream of society in low-carbon economy, before capacitance automobile shows wide development
Scape, the construction for the auxiliary facility that charges and the development of electric vehicle are closely bound up.It is not good enough for outdoor charging pile rain and sun measure.
It is difficult to ensure this limitation of charging equipment usage safety performance and physical life, the operation principle for mixing power grid is extended to and is filled
Electric stake, it is proposed that a kind of continuous-stable power-supplying and can be detached from the honourable energy storage wisdom energy tower (Shen that power grid independently uses
Please be number for 201520556685.8), the present invention is directed to propose that one kind is feasible for the energy management of the scene energy storage wisdom energy tower
Scheme extends the service life of energy-storage battery to realize continuous-stable power-supplying.
Invention content
The goal of the invention of the present invention is the deficiency for above-mentioned background technology, provides the energy of honourable energy storage wisdom energy tower
Management strategy is measured, is dispatched by the energy between micro-capacitance sensor and energy storage device, is realized the stable power-supplying of energy tower, solve
The technical issues of existing charging pile depends on traditional power grid unduly.
The present invention adopts the following technical scheme that for achieving the above object：
The energy management strategies of honourable energy storage wisdom energy tower are used in wisdom energy tower between micro-capacitance sensor and energy storage device
Energy management, energy management strategies specifically include following five kinds of patterns：
Pattern one：Bulk power grid normal operation, micro-grid connection operation, gird-connected inverter control DC bus-bar voltage, preferentially
Distributed generation resource in micro-capacitance sensor is controlled to return when distributed power source output power is sufficient for loading demand to load output power
Surplus power is presented to bulk power grid, bulk power grid is controlled when distributed power source output power is less than loading demand to load output work
Rate switches to pattern two when bulk power grid output power is more than gird-connected inverter rated power；
Pattern two：Bulk power grid normal operation, micro-grid connection operation, energy storage device maintains DC bus-bar voltage, preferential to control
Distributed generation resource is to load output power in micro-capacitance sensor processed, the feedback when distributed power source output power is sufficient for loading demand
Surplus power controls energy storage device when distributed power source output power is less than loading demand to load output work to energy storage device
Rate, gird-connected inverter current limliting operation, mould is switched to when bulk power grid output power is less than or equal to gird-connected inverter rated power
Formula one switches to pattern three in bulk power grid failure；
Pattern three：Micro-capacitance sensor independent operating, energy storage device maintain DC bus-bar voltage, distributed in priority acccess control micro-capacitance sensor
Power supply to load output power, when distributed power source output power is sufficient for loading demand feedback surplus power to energy storage set
Standby, when distributed power source output power is less than loading demand, control energy storage device restores to load output power in bulk power grid
Pattern one is switched to after normal, pattern four is switched to when energy storage device carrying capacity is greater than or equal to maximum carrying capacity, in energy storage
Equipment carrying capacity switches to pattern five when being less than minimum carrying capacity or energy storage device output power more than itself rated power,
When distributed power source output power is sufficient for loading demand, feedback surplus power is to energy storage device, specially：
When energy storage device carrying capacity is less than or equal to maximum carrying capacity, if bearing power and distributed power source output power
The absolute value of difference is less than or equal to energy storage device maximum charge power, with the difference of bearing power and distributed power source output power
Volume is that energy storage device gives power, and distributed generation resource charges to energy storage device, otherwise, controls distributed generation resource output-constant operation,
Give power by energy storage device of energy storage device maximum charge power, distributed generation resource to energy storage device constant power charge,
When energy storage device carrying capacity is more than maximum carrying capacity, control distributed generation resource output-constant operation, energy storage device into
Enter full electric standby mode；
Pattern four：Micro-capacitance sensor independent operating, distributed generation resource maintain DC bus-bar voltage, are distributed in priority acccess control micro-capacitance sensor
Formula power supply is to load output power, the adjustment distributed generation resource work when distributed power source output power has met loading demand enough
Pattern is to reduce the output of distributed generation resource, and when distributed power source output power is less than loading demand, control energy storage device is to negative
Output power is carried, pattern three is switched to when energy storage device carrying capacity is less than maximum carrying capacity；
Pattern five：Micro-capacitance sensor independent operating, energy storage device are able to maintain that DC bus-bar voltage, divide in priority acccess control micro-capacitance sensor
Cloth power supply is to load output power, and when distributed power source output power is sufficient for loading demand, feedback surplus power is extremely stored up
Energy equipment, the cut-out load when distributed power source output power is less than loading demand are more than most in energy storage device carrying capacity
Pattern three is switched to when small carrying capacity.
Further, defeated to loading in control bulk power grid in the energy management strategies pattern one of honourable energy storage wisdom energy tower
While going out power, only when energy storage device carrying capacity is less than maximum carrying capacity, control bulk power grid is filled to energy storage device invariable power
Electricity.
Further, in distributed power source output power in the energy management strategies pattern two of honourable energy storage wisdom energy tower
Energy storage device is controlled when less than loading demand to load output power, specially：
When energy storage device carrying capacity is greater than or equal to minimum carrying capacity, if bearing power and distributed power source output power
The absolute value of difference is less than or equal to energy-storage system maximum discharge power, otherwise control energy storage device is cut to load constant voltage discharge
Except sub-load, energy storage device enters low electric standby mode；
When energy storage device carrying capacity is less than minimum carrying capacity, cut-out load, energy storage device enters the low standby shape of electricity
State.
Energy management strategies as the honourable energy storage wisdom energy tower advanced optimize scheme, preferential in pattern three
Distributed generation resource is to the method for load output power in control micro-capacitance sensor：Distributed generation resource is controlled to load using MPPT methods
Maximum Power Output.
The further prioritization scheme of energy management strategies as the honourable energy storage wisdom energy tower, in pattern three
Control energy storage device is to load output power when distributed power source output power is less than loading demand, specially：
When energy storage device carrying capacity is greater than or equal to minimum carrying capacity, if bearing power and distributed power source output power
Difference be less than or equal to energy storage device maximum discharge power, with the difference of bearing power and distributed power source output power be storage
Energy equipment gives power, and energy storage device is to load output power, otherwise, reduces load, is with energy storage device maximum discharge power
Energy storage device gives power, and energy storage device is to load output power；
When energy storage device carrying capacity is less than minimum carrying capacity, load is reduced, energy storage device enters low electric standby mode.
Further, distributed generation resource maintains direct current female in the energy management strategies pattern four of honourable energy storage wisdom energy tower
The method of line voltage is：Control photo-voltaic power supply works in constant voltage mode to maintain DC bus-bar voltage, in control photovoltaic electric first
When still cannot be satisfied power-balance demand after the operating mode of source, the output power of fan power is adjusted.
The present invention uses above-mentioned technical proposal, has the advantages that：
(1) micro-grid connection is run, when gird-connected inverter unsaturation, according to loading demand and output power of power supply balance
It is required that control bulk power grid or micro-capacitance sensor power to the load, the extra output of micro-capacitance sensor is fed back to bulk power grid, bulk power grid is only in energy storage
It had not only powered to the load when equipment carrying capacity is less than but also had charged to energy storage device, when gird-connected inverter is saturated, control energy storage device is flat
Weigh power difference；Micro-capacitance sensor off-grid operation, energy tower are charged by its internal micro-capacitance sensor and energy storage device to electric vehicle, and
Energy storage device carrying capacity gives corresponding DC bus-bar voltage Concept of Maintenance when too high or too low so that energy tower can be detached from
Power grid works independently, and each pattern of energy management strategies maintains power-balance in energy tower, realizes the stable power-supplying of energy tower,
Extra output can also be fed back when meeting loading demand to power generating network, relative to traditional mixing power grid energy management strategy, letter
Change algorithm, improves energy management efficiency；
(2) when off-grid operation, it is contemplated that energy storage device charge capacity adjusts control mode to maintain DC bus electric in time
Pressure must extend the service life of energy storage device as far as possible on the basis of maintaining power-balance in pyramid of energy.
Description of the drawings
Fig. 1 is the structure of block diagram of each component composition of energy tower.
Each unit operating status coordinates the flow chart of control when Fig. 2 is micro-capacitance sensor off-grid operation.
Fig. 3 is the flow chart that each unit operating status coordinates control when micro-grid connection is run.
Fig. 4 is the switching schematic diagram of five kinds of patterns.
Specific implementation mode
The technical solution of invention is described in detail below in conjunction with the accompanying drawings.
Application No. is the honourable energy storage wisdom energy towers of 201520556685.8 patent disclosure, including as mounting body
Energy tower, around energy tower top be arranged photovoltaic panel, be arranged the gentle breeze-driven generator on photovoltaic panel top, energy-storage battery and
The charging pile body being arranged around energy tower lower part, the electric energy of the electric energy output end and energy-storage battery of photovoltaic panel and gentle breeze-driven generator
Input terminal connects, and the electrical energy inputs for the pile body that charges and the electric energy output end of energy-storage battery connect.
The structure of block diagram of each component composition of energy tower is as shown in Figure 1, photovoltaic panel and gentle breeze-driven generator constitute the wisdom energy
The alternating current of the micro-capacitance sensor of tower, gentle breeze-driven generator output imports DC bus by AC/DC, and the alternating current of photovoltaic panel output is into mistake
DC/DC imports DC bus, and gird-connected inverter DC/AC, DC bus and energy storage device are connected between DC bus and bulk power grid
Between be connected to DC/DC.The electric energy that photovoltaic panel and gentle breeze-driven generator convert is stored in by lithium battery and super by Energy Management System
In the energy storage device of capacitance composition, distribution and the tune of power storage can be realized in the energy management strategies that cooperation the application proposes
Degree.
As shown in Fig. 2, when micro-capacitance sensor off-grid operation, busbar voltage is established by energy storage device first, later start wind-powered electricity generation with
Photovoltaic system, and put into load.In order to realize micro-capacitance sensor in energy tower, energy storage device and the power-balance of load, energy storage is needed
Equipment provides certain power and carrys out supplemental capacity vacancy, and in a practical situation, the energy storage devices such as accumulator can be by many limits
System, such as：Carrying capacity Q, maximum charge power Pbcmax, maximum discharge power Pbdmax.If at this point, energy storage device carrying capacity is insufficient, or
Person needs selective excision certain load to ensure whole system when the power of required offer is more than its maximum discharge power
Stable operation.
If energy-storage system needs power P to be offerednetLess than 0, Pnet=PL-PDG, illustrate the power of distributed generation resource output
PDGMore than loading demand PL, as far as possible according to energy storage device electricity, maximum charge power, maximum discharge power control energy storage device
Ground absorbs the surplus power of distributed generation resource output；If energy-storage system needs power P to be offerednetMore than 0, illustrate distributed electrical
The power P of source outputDGLess than loading demand PL, controlled according to energy storage device carrying capacity, maximum charge power, maximum discharge power
Energy storage device is as much as possible to load output power to balance power difference.
Pnet<0：Q≤QmaxAnd | Pnet|≤PbcmaxWhen, power P to be offered is needed with energy-storage systemnetIt is given for energy storage device
Power Pb, the surplus power of distributed generation resource output is absorbed by energy storage device；Q≤QmaxAnd | Pnet|>PbcmaxWhen, adjust wind-powered electricity generation
Power supply, photo-voltaic power supply switch to power limitation control pattern, with energy storage device maximum charge power PbcmaxPower is given for energy storage device
Pb, distributed generation resource to energy storage device charge；Q>QmaxWhen, adjustment wind-powered electricity generation power supply, photo-voltaic power supply switch to power limitation control pattern,
Energy storage device gives power PbIt is 0, energy-storage system enters full electric standby mode.
Pnet=0：Energy storage device gives power PbIt is 0, energy-storage system enters standby mode.
Pnet>0：Q≥QminAnd Pnet≤PbdmaxWhen, energy-storage system needs power P to be offerednetPower is given for energy storage device
Pb, energy storage device discharges provides power difference to energy storage device；Q≥QminAnd Pnet>PbdmaxWhen, load is reduced, with energy storage device
Maximum discharge power PbdmaxPower P is given for energy storage deviceb, energy storage device discharges provides power difference to energy storage device；Q<Qmin
When, load is reduced, energy storage device gives power PbIt is 0, energy-storage system enters low electric standby mode.
Bulk power grid normal operation, micro-capacitance sensor works in and net state, and DC bus-bar voltage is controlled by gird-connected inverter, electric power storage
Pond energy-storage system is operated in standby mode, and photoelectricity, wind power system are operated in MPPT patterns, and distributed electrical source power is more than load
The extra part of feedback supplements insufficient work(when distributed generation resource is not enough to provide bearing power to bulk power grid by bulk power grid when power
Rate.If bulk power grid output power PGMore than the rated power P of gird-connected inverterGNWhen, then gird-connected inverter is operated in current-limit mode,
Output current is clamped as IGmax, can not continue to stablize busbar voltage, busbar voltage must change, therefore turn to be tieed up by energy-storage system
Busbar voltage is held, and when bearing power reduces, gird-connected inverter exits saturation, and busbar voltage is again by gird-connected inverter control
System.
As shown in figure 3, micro-capacitance sensor and when running, gird-connected inverter establishes busbar voltage, starts wind-powered electricity generation and photovoltaic system later
System, and put into load.In order to still balance power difference when gird-connected inverter is saturated, according to energy storage device carrying capacity, most
The charge and discharge of big discharge power control energy storage device.If at this point, energy storage device carrying capacity is insufficient, alternatively, the power of required offer
When more than its maximum discharge power, selective excision certain load is needed to ensure the stable operation of whole system.
PG≤PGN：Q≤QmaxWhen, distributed generation resource or bulk power grid charge to energy storage device invariable power；Q>QmaxWhen, energy storage is set
It is standby to enter full electric standby mode, stop charging.
PG>PGN：Gird-connected inverter works in current-limit mode, and bulk power grid exports gird-connected inverter rated power, Q >=QminAnd
Pnet≤PbdmaxWhen, energy storage device discharges to load output power；Q≥QminAnd Pnet>PbdmaxWhen, reduce load, energy storage device
Into low electric standby mode；Q<QminWhen, load is reduced, energy storage device enters low electric standby mode.
The present invention is according to above-mentioned off-grid operation and is incorporated into the power networks, it is proposed that as shown in Figure 4 being used for is micro- in wisdom energy tower
The strategy of energy management between power grid and energy storage device specifically includes five kinds of patterns.
Pattern one：Bulk power grid normal operation, micro-capacitance sensor works in and net state, and DC bus-bar voltage is by gird-connected inverter control
System, energy-storage system of accumulator are operated in standby mode, and photoelectricity, wind power system are operated in MPPT patterns.Priority acccess control micro-capacitance sensor
Middle distributed generation resource is to load output power, the feedback surplus power when distributed power source output power is sufficient for loading demand
To bulk power grid, when distributed power source output power is less than loading demand, control bulk power grid is big in control to load output power
While power grid is to load output power, only when energy storage device carrying capacity is less than maximum carrying capacity, control bulk power grid is set to energy storage
Standby invariable power charges, and pattern two is switched to when bulk power grid output power is more than gird-connected inverter rated power.
Pattern two：When micro-grid connection is run, if power grid output power PGMore than the rated power P of gird-connected inverterGNWhen,
Then gird-connected inverter is operated in current-limit mode, and output current is clamped as IGmax, can not continue to stablize busbar voltage, busbar voltage must
It can change, therefore turn to maintain busbar voltage by energy storage device.In priority acccess control micro-capacitance sensor distributed generation resource to load output work
Rate, when distributed power source output power is sufficient for loading demand, feedback surplus power is to energy storage device, in distributed generation resource
Control energy storage device is to load output power when output power is less than loading demand, and gird-connected inverter current limliting is run, in bulk power grid
Output power switches to pattern one when being less than or equal to gird-connected inverter rated power, and pattern is switched in bulk power grid failure
Three.
Pattern three：When bulk power grid failure, gird-connected inverter disconnects, and micro-capacitance sensor independent operating, DC bus-bar voltage is by energy storage
Equipment controls.Distributed generation resource is operated in MPPT patterns to load output power, in distributed generation resource in priority acccess control micro-capacitance sensor
Output power is sufficient for feedback surplus power when loading demand and is less than load in distributed power source output power to energy storage device
Energy storage device is controlled when demand to load output power, pattern one is switched to after bulk power grid restores normal, in energy storage device lotus
Electricity switches to pattern four when being greater than or equal to maximum carrying capacity, is less than minimum carrying capacity in energy storage device carrying capacity or energy storage is set
Standby output power switches to pattern five when being more than itself rated power.
Pattern four：Micro-capacitance sensor independent operating, accumulator electric-quantity has reached full electricity, and is made in order to prevent to accumulator super-charge
At injury, the charging to accumulator should be stopped, distributed generation resource maintains DC bus-bar voltage, and power is flat in system in order to realize
Weighing apparatus, distributed generation resource should exit MPPT patterns.In order to avoid extension set frequent start-stop, the preferential operating mode for changing electro-optical system.
In such a mode, electro-optical system first exits MPPT patterns, and Isobarically Control pattern is taken to maintain busbar voltage.If only controlling Opto-electrical Section
System still cannot be satisfied system balancing, then adjust the power of wind turbine.Under the pattern, busbar voltage is controlled by distributed generation resource.Preferentially
Distributed generation resource is to load output power in control micro-capacitance sensor, the tune when distributed power source output power has met loading demand enough
Whole distributed Voltage operating mode is to reduce the output of distributed generation resource, when distributed power source output power is less than loading demand
Energy storage device is controlled to load output power, pattern three is switched to when energy storage device carrying capacity is less than maximum carrying capacity.
Pattern five：Micro-capacitance sensor independent operating, energy storage device are able to maintain that DC bus-bar voltage, when accumulator demand power is big
Battery-operated puts state in limited current state or excessively when either accumulator electric-quantity reaches lower limit to its rated power.It needs to cut off
Fractional load ensures system worked well to maintain busbar voltage.Distributed generation resource is exported to load in priority acccess control micro-capacitance sensor
Power, when distributed power source output power is sufficient for loading demand, feedback surplus power is to energy storage device, in distributed electrical
Cut-out load when source output power is less than loading demand switches to mould when energy storage device carrying capacity is more than minimum carrying capacity
Formula three.
As it can be seen that using energy management strategies of the present invention：
The present invention uses above-mentioned technical proposal, has the advantages that：
(1) micro-grid connection is run, when gird-connected inverter unsaturation, according to loading demand and output power of power supply balance
It is required that control bulk power grid or micro-capacitance sensor power to the load, the extra output of micro-capacitance sensor is fed back to bulk power grid, bulk power grid is only in energy storage
It had not only powered to the load when equipment carrying capacity is less than but also had charged to energy storage device, when gird-connected inverter is saturated, control energy storage device is flat
Weigh power difference；Micro-capacitance sensor off-grid operation, energy tower are charged by its internal micro-capacitance sensor and energy storage device to electric vehicle, and
Energy storage device carrying capacity gives corresponding DC bus-bar voltage Concept of Maintenance when too high or too low so that energy tower can be detached from
Power grid works independently, and each pattern of energy management strategies maintains power-balance in energy tower, realizes the stable power-supplying of energy tower,
Extra output can also be fed back when meeting loading demand to power generating network, relative to traditional mixing power grid energy management strategy, letter
Change algorithm, improves energy management efficiency；
(2) when off-grid operation, it is contemplated that energy storage device charge capacity adjusts control mode to maintain DC bus electric in time
Pressure must extend the service life of energy storage device as far as possible on the basis of maintaining power-balance in pyramid of energy.
Claims (6)
1. the energy management strategies of honourable energy storage wisdom energy tower are used in wisdom energy tower between micro-capacitance sensor and energy storage device
Energy management, which is characterized in that the energy management strategies specifically include following five kinds of patterns：
Pattern one：Bulk power grid normal operation, micro-grid connection operation, gird-connected inverter control DC bus-bar voltage, priority acccess control
Distributed generation resource is to load output power in micro-capacitance sensor, and when distributed power source output power is sufficient for loading demand, feedback is more
Complementary work rate to bulk power grid, when distributed power source output power is less than loading demand control bulk power grid to load output power,
Bulk power grid output power switches to pattern two when being more than gird-connected inverter rated power；
Pattern two：Bulk power grid normal operation, micro-grid connection operation, energy storage device maintain DC bus-bar voltage, priority acccess control micro-
Distributed generation resource is to load output power in power grid, and when distributed power source output power is sufficient for loading demand, feedback is extra
Power to energy storage device, when distributed power source output power is less than loading demand control energy storage device to load output power,
Gird-connected inverter current limliting is run, and pattern is switched to when bulk power grid output power is less than or equal to gird-connected inverter rated power
One, switch to pattern three in bulk power grid failure；
Pattern three：Micro-capacitance sensor independent operating, energy storage device maintain DC bus-bar voltage, distributed generation resource in priority acccess control micro-capacitance sensor
To load output power, when distributed power source output power is sufficient for loading demand feedback surplus power to energy storage device,
When distributed power source output power is less than loading demand, control energy storage device restores normal to load output power in bulk power grid
After switch to pattern one, pattern four is switched to when energy storage device carrying capacity is greater than or equal to maximum carrying capacity, in energy storage device
Carrying capacity switches to pattern five when being less than minimum carrying capacity or energy storage device output power more than itself rated power,
When distributed power source output power is sufficient for loading demand, feedback surplus power is to energy storage device, specially：
When energy storage device carrying capacity is less than or equal to maximum carrying capacity, if bearing power and distributed power source output power difference
Absolute value be less than or equal to energy storage device maximum charge power, the difference with bearing power and distributed power source output power is
Energy storage device gives power, and distributed generation resource charges to energy storage device, otherwise, distributed generation resource output-constant operation is controlled, with storage
Can equipment maximum charge power be that energy storage device gives power, distributed generation resource to energy storage device constant power charge,
When energy storage device carrying capacity is more than maximum carrying capacity, distributed generation resource output-constant operation is controlled, energy storage device enters full
Electric standby mode；
Pattern four：Micro-capacitance sensor independent operating, distributed generation resource maintain DC bus-bar voltage, distributed electrical in priority acccess control micro-capacitance sensor
Source adjusts distributed generation resource operating mode when distributed power source output power has met loading demand enough to load output power
To reduce the output of distributed generation resource, when distributed power source output power is less than loading demand, control energy storage device is defeated to loading
Go out power, pattern three is switched to when energy storage device carrying capacity is less than maximum carrying capacity；
Pattern five：Micro-capacitance sensor independent operating, energy storage device are able to maintain that DC bus-bar voltage, distributed in priority acccess control micro-capacitance sensor
Power supply to load output power, when distributed power source output power is sufficient for loading demand feedback surplus power to energy storage set
Standby, the cut-out load when distributed power source output power is less than loading demand is more than minimum lotus in energy storage device carrying capacity
Pattern three is switched to when electricity.
2. the energy management strategies of honourable energy storage wisdom energy tower according to claim 1, which is characterized in that in pattern one
While bulk power grid is controlled to load output power, only when energy storage device carrying capacity is less than maximum carrying capacity control bulk power grid to
Energy storage device invariable power charges.
3. the energy management strategies of honourable energy storage wisdom energy tower according to claim 1, which is characterized in that in pattern two
Control energy storage device is to load output power when distributed power source output power is less than loading demand, specially：
When energy storage device carrying capacity is greater than or equal to minimum carrying capacity, if bearing power and distributed power source output power difference
Absolute value be less than or equal to energy-storage system maximum discharge power, control energy storage device to load constant voltage discharge, otherwise, cutout unit
Load, energy storage device is divided to enter low electric standby mode；
When energy storage device carrying capacity is less than minimum carrying capacity, cut-out load, energy storage device enters low electric standby mode.
4. the energy management strategies of honourable energy storage wisdom energy tower according to claim 3, which is characterized in that excellent in pattern three
First control distributed generation resource in micro-capacitance sensor is to the method for load output power：Distributed generation resource is controlled to negative using MPPT methods
Carry Maximum Power Output.
5. the energy management strategies of honourable energy storage wisdom energy tower according to claim 1, which is characterized in that in pattern three
Control energy storage device is to load output power when distributed power source output power is less than loading demand, specially：
When energy storage device carrying capacity is greater than or equal to minimum carrying capacity, if the difference of bearing power and distributed power source output power
Volume is less than or equal to energy storage device maximum discharge power, is set as energy storage using the difference of bearing power and distributed power source output power
Standby given power, energy storage device is to load output power, otherwise, load is reduced, using energy storage device maximum discharge power as energy storage
Equipment gives power, and energy storage device is to load output power；
When energy storage device carrying capacity is less than minimum carrying capacity：Load is reduced, energy storage device enters low electric standby mode.
6. the energy management strategies of honourable energy storage wisdom energy tower according to claim 1, which is characterized in that divide in pattern four
Cloth power supply maintain DC bus-bar voltage method be：Control photo-voltaic power supply first works in constant voltage mode to maintain DC bus
Voltage adjusts the output work of fan power when still cannot be satisfied power-balance demand after controlling photo-voltaic power supply operating mode
Rate.
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| CN106451561B (en) * | 2016-12-09 | 2019-04-02 | 国网江苏省电力公司苏州供电公司 | Low pressure microgrid cooperative control device and method |
| CN106786554A (en) * | 2017-01-17 | 2017-05-31 | 珠海格力电器股份有限公司 | The control method and device of micro-grid system |
| CN106953346B (en) * | 2017-05-03 | 2020-03-24 | 国网上海市电力公司 | Off-grid micro-grid energy management method for sodium-sulfur battery |
| CN108099647A (en) * | 2017-12-07 | 2018-06-01 | 贵州电网有限责任公司电力科学研究院 | Electric vehicle parking systems charging system based on 10kv direct-current micro-grids |
| CN108023366B (en) * | 2018-01-25 | 2020-03-31 | 南京工程学院 | Method for preventing overvoltage of neutral point of main transformer for high-permeability photovoltaic |
| CN109274088B (en) * | 2018-10-17 | 2020-12-25 | 珠海格力电器股份有限公司 | Energy control method, energy control device, energy management system and storage medium |
| CN109763935B (en) * | 2018-12-20 | 2020-06-30 | 明阳智慧能源集团股份公司 | Control method for miniature wind driven generator of standby power supply system of wind turbine generator |
| CN110707747A (en) * | 2019-10-25 | 2020-01-17 | 国网北京市电力公司 | Household photovoltaic micro-grid energy management system containing coal-to-electricity equipment |
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