CN107785931A - A kind of small-sized electric energy management is with coordinating control integrated apparatus - Google Patents
A kind of small-sized electric energy management is with coordinating control integrated apparatus Download PDFInfo
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- CN107785931A CN107785931A CN201710958092.8A CN201710958092A CN107785931A CN 107785931 A CN107785931 A CN 107785931A CN 201710958092 A CN201710958092 A CN 201710958092A CN 107785931 A CN107785931 A CN 107785931A
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- 238000000465 moulding Methods 0.000 claims description 2
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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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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- H02J3/386—
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a kind of small-sized electric energy management with coordinating control integrated apparatus, it is bright be related to generation of electricity by new energy, electric automobile discharge and recharge, the electric energy management of supply network controls with coordinating in battery energy storage and family, belong to family's controlling electric energy and management domain comprising the Novel electric equipment such as new energy equipment and electric automobile.Energy management control unit in device obtains each AC/DC and DC/DC modules in real time, and the information that sends over of controller of AC DC AC modules.Each distributed energy power producing characteristics are analyzed on this basis, prejudge Generation Side and the requirement of Demand-side power-balance, assess the energy stream state change of each equipment room.Then calculated by Optimized Operation, and then coordinate control modules Effec-tive Function, realize that Energy Efficient flows.So ensureing on the premise of the stable safe operation of whole device and external electric equipment, making full use of wind-power electricity generation and solar power generation generates electricity energy, realize energy-conserving and environment-protective, and economic well-being of workers and staff is brought to user.
Description
Technical field
The present invention relates to the electric energy of supply network in generation of electricity by new energy, electric automobile discharge and recharge, battery energy storage and family
Management controls with coordinating, and belongs to the family's controlling electric energy for including the Novel electric equipment such as new energy equipment and electric automobile
With management domain.
Background technology
As the development of national economy, electricity needs are growing.In following global energy internet, exist substantial amounts of
The new energy equipments such as wind energy, solar energy, and this kind of Novel electric that can carry out energy bi-directional conversion of electric automobile are set
It is standby.These equipment have it is a great deal of be not centralized management, therefore energy internet must solve a large amount of distributed power sources with
Operation problem in power network.Micro-capacitance sensor technology is the effective way for solving this problem at present, passes through the self-control of micro-capacitance sensor
Mechanism, effective access of a large amount of distributed power sources can be achieved, it is as small as possible both to have ensure that the safe operation to power distribution network produced
Influence, and can enough maximally utilises regenerative resource and clean energy resource.
Patent CN105244909A《A kind of direct current micro-grid system and grid-connected self-balancing control strategy》Disclose a kind of direct current
Micro-grid system, it includes a variety of distributed power sources.The output end of every kind of distributed power source passes sequentially through DC/DC converters and distribution
Formula mains side dc circuit breaker accesses dc bus, and dc bus passes sequentially through load-side dc circuit breaker and load DC/DC becomes
Parallel operation provides electric energy for smart home load.
Patent CN105356576A《A kind of parallel networking type photovoltaic DC micro power grid system and its progress control method》Disclose
A kind of parallel networking type photovoltaic DC micro power grid system and progress control method.Photovoltaic generation unit is become by unidirectional DC/DC in system
Parallel operation is connected to dc bus, energy-storage units and capacitor and is connected to dc bus, utility grid by two-way DC/DC converters
Side is connected to dc bus by two-way AC/DC converters, and load is directly connected in dc bus.
Patent CN204376420U《A kind of microgrid energy management control system》Disclose a kind of microgrid energy management
Control system, its structure are：Photovoltaic array is connected by photovoltaic DC/DC with dc bus, maximum power tracking device and photovoltaic
DC/DC connections, wind power generation plant are connected by wind-force AC/DC with dc bus, and battery and battery management system pass through DC/
DC converters are connected with dc bus, and load is connected with dc bus.
It is all by each independent breaker, AC/DC converters, DC/DC converters, light that the related micro-capacitance sensor of the above, which is set up,
Generator unit, wind power generation unit, energy-storage units, energy management unit, load and utility grid side etc. is lied prostrate by certain way to connect
Pick up and, so as to coordinate to control the operation of micro-capacitance sensor.
Microminiature network system with family or building for power unit, generally also can include photovoltaic generation, wind-power electricity generation,
The various generatings such as electric automobile and electrical equipment, now still go to solve various equipment in this kind of system in a manner of above-mentioned micro-capacitance sensor
Interconnection and collaborative work problem, can be disperseed due to module, device category is diversified in specifications so that networking process is complicated, is not easy to
Maintenance and upgrade.Simultaneously harmonious ability to work is poor, effective dynamic can not be carried out to energy flow in system level
Optimum management, operational efficiency are difficult to be optimal.
In view of the application characteristic of microminiature network system：(1) connection between equipment is apart from short；(2) power of equipment
It is smaller；(3) number of devices and species of connection are relatively fixed.Therefore structure with plug and play interface small-sized electric energy management with
Coordinate control integrated apparatus and be more suitable for microminiature network system, have more in family or building for the system of power unit
Good practicality and flexibility.
The content of the invention
It is in consideration of it, integrated with coordinating control the invention provides a kind of small-sized electric energy management with plug and play interface
Device, the device technical problems to be solved are：(1) integrated level height, the generating of various accesses and electrical equipment no longer need outer
Single DC/DC, AC/DC module in portion to be connected with system；(2) coordination ability is good, because each DC/DC, AC/DC module is built in
In equipment, therefore it can be with master controller real time interaction information, it then follows unified specification receives, performs energy traffic order
Deng so as to the coordination control ability with maximum possible；(3) access is simple, and the present apparatus provides inserting i.e. for external equipment
With interface, even if to unintelligent device, can be also attached by simply setting.
A kind of small-sized electric energy management of the present invention includes with coordinating control integrated apparatus, the device：Energy management control is single
Member, high frequency transformer, the first AC-DC-AC converters, the 2nd AC-DC-AC converters, the first unidirectional DC/DC modules, the second list
It is external to DC/DC modules, unidirectional AC/DC modules, two-way DC/DC modules, dc bus, and internal information logical circulation road, device
Wind generator system, photovoltaic generating system, battery energy storage system, electric automobile, alternating current-direct current load or external communication power network；
External electrical network is connected by the first AC-DC-AC converters with high frequency transformer, and high frequency transformer passes through second again
AC-DC-AC converters are connected with AC load；The dc bus is connected with DC circuit in the 2nd AC-DC-AC converters,
The dc bus transmits electric energy by the first unidirectional DC/DC modules to DC load, and the wind generator system passes through unidirectional
AC/DC modules transmit electric energy to dc bus, and the photovoltaic generating system is passed by the second unidirectional DC/DC modules to dc bus
Transmission of electricity can, the dc bus is connected by the first two-way DC/DC modules with battery energy storage system, and the dc bus passes through the
Two two-way DC/DC modules connect with electric automobile；The energy management control unit coordinates control respectively according to running situation
Individual module is run, and has module controller in modules, is responsible for the energy flow size and Orientation of control module.
Further, the control method of the energy management control unit is：
First, security control；
The control of DC/DC modules unidirectional to first, second：When the blocks current reverse flow, module overload, module lose
During control, respective modules are turned off, and show module exception；
Control to unidirectional AC/DC modules：When blocks current reverse flow, module overload, module are out of hand, shut-off
Respective modules, and show module exception；
The control of DC/DC modules two-way to first, second：When module flow through electric current be more than maximum load current when, module
When out of hand, respective modules are turned off, and show module exception；
Second, module control
The specific controlling behavior that module control is carried out for modules under its controller action, these controls include:It is single
To the control of the maximum power tracing of AC/DC modules and the second unidirectional DC/DC modules, the dc bus of the first two-way DC/DC modules
Voltage stabilizing control, the second two-way DC/DC modules flow of power control and dc bus voltage stabilizing control, two-way AC/DC modules (by
AC-DC-AC conversion and net side, high frequency transformer and AC-DC-AC conversion user side AC-DC module composition) dc bus it is steady
(AC-DC-AC converts the DC-AC moulds of user side for voltage-controlled system, the control of the flow of power of two-way AC/DC modules and unidirectional DC/AC modules
Block) AC voltage stabilizings control.
3rd, energy management control unit coordinates control
Energy management control unit obtains each AC/DC modules, DC/DC modules, the controller of AC-DC-AC modules in real time
The job information sended over, and the link information of the device and external equipment, then according to different situations, corresponding to implementation
Energy management controls.
Further, the specific control method under the different situations is：
Connection 1：
The power network or equipment of device connection have：Power network, solar power generation or wind power plant, batteries to store energy equipment,
Electric automobile energy storage device and alternating current-direct current load；
Control strategy：Unidirectional AC/DC modules and the second unidirectional DC/DC modules are operated in maximum power tracing control model
Under；Second two-way DC/DC modules are operated in charging electric vehicle under flow of power control model, if electric automobile energy storage is set
Standby electric energy underfill, charge power is set as a constant positive value, is otherwise 0；First two-way DC/DC modules are operated in dc bus
Under voltage stabilizing control model；Unidirectional DC/AC modules are operated under AC voltage stabilizing control models；Two-way AC/DC modules are operated in power flow
Under dynamic control model, its set value of the power is：
(1) when accumulator electric-quantity is between 20% to 90%, and new energy equipment generated output subtracts load
The dump power that consumption power obtains is the charge or discharge power that battery can be born：Set two-way AC/DC modular powers
Flow for 0, energy exchange is carried out to reduce microgrid and power network in family；
(2) when new energy equipment generated output, to subtract the obtained dump power of load consumption power smaller (negative),
Battery can not provide enough discharge powers：The flowing of two-way AC/DC modular powers is set as one on the occasion of (electric energy is from power network to straight
Flow bus transmission)；
(3) when new energy equipment generated output larger, the battery that subtracts the obtained dump power of load consumption power
Enough charge powers can not be provided：Setting two-way AC/DC modular powers flowing, (electric energy is from dc bus to power network for a negative value
Transmission)；
(4) when accumulator electric-quantity is less than 20%, it is ensured that battery is in charging when setting two-way AC/DC modular powers
State (energy flows to battery from dc bus)；
(5) when accumulator electric-quantity is more than 90%, it is ensured that battery is in electric discharge when setting two-way AC/DC modular powers
State；
Connection 2：
The power network or equipment of device connection have：Power network, batteries to store energy equipment, electric automobile energy storage device and alternating current-direct current are born
Lotus.Fewer than connection 1 to connect new energy equipment, when new energy equipment does not generate electricity or corresponding module disconnects automatically
Belong to the situation；
Control strategy：Now unidirectional AC/DC modules and the second unidirectional DC/DC modules do not work, and generation of electricity by new energy power is
0；Other control methods and connection 1 are identical；
Connection 3：
The power network or equipment of device connection have：New energy equipment, batteries to store energy equipment, electric automobile energy storage device
Loaded with alternating current-direct current.It is fewer than connection 1 to connect power network；
Control strategy：
First set unidirectional AC/DC modules and the second unidirectional DC/DC modules are operated under maximum power tracing control model；The
One two-way DC/DC modules are operated under dc bus voltage stabilizing control model.Unidirectional DC/AC modules are operated in AC voltage stabilizing control models
Under；Second two-way DC/DC modules are operated under flow of power control model, its flow of power set value setting method as：
(1) when accumulator electric-quantity is between 20% to 90%, and new energy equipment generated output subtracts load
The dump power that consumption power obtains is the charge or discharge power that battery can be born：Second two-way DC/DC modular powers
Flowing is set as 0；
(2) when new energy equipment generated output, to subtract the obtained dump power of load consumption power smaller (negative),
Battery can not provide enough discharge powers：Second two-way DC/DC modular powers flowing is set as a negative value, and (electric automobile is put
Electricity)；
(3) when new energy equipment generated output larger, the battery that subtracts the obtained dump power of load consumption power
Enough charge powers can not be provided：Second two-way DC/DC modular powers flowing is set as one on the occasion of the work(if battery charges
Rate and charging electric vehicle power setting are still not able to balance flow of power, the unidirectional AC/ of new energy equipment to maximum
DC modules and the second unidirectional DC/DC modules stop maximum power tracing, are changed to power-balance point tracking；
(4) when accumulator electric-quantity is less than 20%, the second two-way DC/DC modular powers flowing setting it is ensured that battery not
In discharge condition；
(5) when accumulator electric-quantity is more than 90%, the second two-way DC/DC modular powers flowing setting it is ensured that battery not
In charged state, if at this moment electric automobile electricity is also filled with, the unidirectional AC/DC modules of new energy equipment and second are singly
Stop maximum power tracing to DC/DC modules, be changed to power-balance point tracking；
Connection 4：
The power network or equipment of device connection have：Power network, new energy equipment, electric automobile energy storage device and alternating current-direct current are born
Carry.Connection batteries to store energy equipment fewer than connection 1, batteries to store energy equipment fault cause the first two-way DC/DC modules to break
Open and fall within the situation；
Control strategy：
Unidirectional AC/DC modules and the second unidirectional DC/DC modules are operated in maximum power tracing control model；Second is two-way
DC/DC modules are operated under flow of power control model to charging electric vehicle, if electric automobile energy storage device electric energy does not fill
Full, charge power is one on the occasion of being otherwise 0.Unidirectional DC/AC modules are operated under AC voltage stabilizing control models；Two-way AC/DC modules
It is operated under dc bus voltage stabilizing control model.
Energy management control unit in device obtains each AC/DC and DC/DC modules, and AC-DC-AC modules in real time
The information that sends over of controller.Each distributed energy power producing characteristics are analyzed on this basis, prejudge Generation Side and Demand-side
Power-balance requirement, assess the energy stream state change of each equipment room.Then calculated by Optimized Operation, and then it is each to coordinate control
Individual modular high-performance operation, realizes that Energy Efficient flows.So ensureing in whole device and the stable safety fortune of external electric equipment
On the premise of row, make full use of wind-power electricity generation and solar power generation generate electricity can, realize energy-conserving and environment-protective, and economy is brought to user
Income.
Brief description of the drawings
Fig. 1 is the structure total figure of apparatus of the present invention.
Fig. 2 is the controlling stream of the maximum power tracing control disturbance detection method of unidirectional AC/DC modules and unidirectional DC/DC modules
Journey.
Fig. 3 is two-way DC/DC modules and two-way AC/DC modules are operated in controlling stream under dc bus voltage stabilizing control model
Journey.
Fig. 4 is two-way DC/DC modules and two-way AC/DC modules are operated in control flow under flow of power control model.
Fig. 5 is unidirectional AC/DC modules and unidirectional DC/DC modules are operated in controlling stream under power-balance point tracking pattern
Journey.
Fig. 6 is the anti-maximum power control sub-process in equalization point Tracing Control flow.
Embodiment
Fig. 1 is the structure total figure of apparatus of the present invention.The annexation of device and external equipment and power network is contained in figure
Signal.The control method specific implementation of device is as follows：
1. security control is embodied
In order to ensure power network, device in itself with the safety of other equipment that is connected, limit priority is during device controls
Security control.Security control table specific as follows：
2. module control specific implementation
The concrete behavior that module control is carried out for modules under its controller action, these controls are mainly:Unidirectionally
The control of the maximum power tracing of AC/DC modules and the second unidirectional DC/DC modules, the dc bus of the first two-way DC/DC modules are steady
Voltage-controlled system, the control of the flow of power of the second two-way DC/DC modules and dc bus voltage stabilizing control, the direct current of two-way AC/DC modules
Bus voltage stabilizing control, the flow of power control of two-way AC/DC modules and the AC voltage stabilizings control of unidirectional DC/AC modules.
(1) the maximum power tracing control of unidirectional AC/DC modules and the second unidirectional DC/DC modules
In order to make full use of wind power generation and solar power generation, unidirectional AC/DC modules and the second unidirectional DC/DC modules have
Maximum power tracing function (MPPT).Method for tracing uses disturbance observation method, and Fig. 2 is the control flow of this method.
The dc bus voltage stabilizing control of (2) first two-way DC/DC modules
When device connects upper energy-storage battery, the first two-way DC/DC modules are run in the presence of energy management control unit
In dc bus voltage stabilizing control model.In this mode, energy management control unit sets dc bus to the module controller
Normal voltage and voltage adaptable error.Module controller detects DC bus-bar voltage, calculates dc bus normal voltage and detection
The difference of the DC bus-bar voltage arrived, without regulation if difference is in voltage adaptable error range, if outside it, using PI
Regulation.Dc bus voltage stabilizing control is actually the PI controls of varied dead zone, and Fig. 3 is the control flow of the pattern.
The flow of power control and dc bus voltage stabilizing control of (3) second two-way DC/DC modules
Second two-way DC/DC modules can run on flow of power control model in the presence of energy management control unit.
In this mode, energy management control unit sets dc bus normal voltage, voltage adaptable error, power to module controller
Flow setting value and power admissible error.Module controller detects virtual voltage, the module streaming current of dc bus, calculates mould
Block flow of power value.Because module transformation of electrical energy has an energy loss, the flow of power value at module both ends be it is discrepant, it is above-mentioned
Flow of power setting value and modular power slamp value are all the controlled quentity controlled variable and detection limit for connecting dc bus side.
In order to ensure that DC bus-bar voltage is stable, when dc bus normal voltage and dc bus virtual voltage difference are more than electricity
Admissible error is pressed, module is switched to dc bus voltage stabilizing control model, and abnormal information is passed into energy management control unit.
When dc bus normal voltage and dc bus virtual voltage difference be less than or equal to voltage adaptable error, if modular power flow set
Definite value is less than power admissible error with modular power flowing value difference, then without regulation, otherwise, is adjusted using PI.Fig. 4 is the control
The control flow chart of molding formula.
(4) the dc bus voltage stabilizing control of two-way AC/DC modules
Two-way AC/DC modules may operate in dc bus voltage stabilizing control mould in the presence of energy management control unit
Formula, at this moment two-way AC/DC modules can play a part of stable DC bus.Its control information received and control method and double
It is identical to the dc bus voltage stabilizing control model of DC/DC modules.
(5) the flow of power control of two-way AC/DC modules
Equally, two-way AC/DC modules also can run under flow of power control model.Its control information received and control
Method processed is similar with the flow of power control model of two-way DC/DC modules.
(6) the AC voltage stabilizings control of unidirectional DC/AC modules
Under this control model, energy management control unit sets voltage, frequency and phase to allow to module controller
Standard value and error.Unidirectional DC/AC modules detection exchange terminal voltage, frequency and phase, and required standard output arranges value
Compare, if both differences are not adjusted in range of allowable error, otherwise carry out PI regulations.Its method and principle and direct current are female
Line voltage stabilizing control is similar, and simply feedback control is to exchange the voltage at end, the electricity in frequency and phase, rather than dc bus
Pressure.
3. energy management control unit coordinates control specific implementation
Connection 1 is embodied：
The power network or equipment of device connection have：(solar power generation or wind-power electricity generation are set for power network, new energy equipment
It is standby), batteries to store energy equipment, electric automobile energy storage device and alternating current-direct current load.
Control strategy：Unidirectional AC/DC modules and the second unidirectional DC/DC modules are operated in maximum power tracing control model
Under.Second two-way DC/DC modules are operated in charging electric vehicle under flow of power control model, if electric automobile energy storage is set
Standby electric energy underfill, charge power are one on the occasion of being otherwise 0.First two-way DC/DC modules are operated in dc bus voltage stabilizing control
Under pattern.Unidirectional DC/AC modules are operated under AC voltage stabilizing control models.Two-way AC/DC modules are operated in flow of power control mould
Under formula, its set value of the power PSetAC2DCSpecifically it is arranged to：
PSetAC2DC≈PRealDCLoad+PRealACLoad+PRealDC2DC2+PDC2DC1-PRealWi-PRealSo
Wherein PRealDCLoadRepresent the actual power of DC load consumption；PRealACLoadRepresent the reality of AC load consumption
Power；PRealDC2DC2Represent the actual power of charging electric vehicle consumption；PRealWiRepresent the actual power of wind-power electricity generation；PRealSo
Represent the actual power of solar power generation；PDC2DC1The power (power is just during charging) of the first two-way DC/DC modules is represented, should
Power is in minimum value PDC2DC1Low(being negative, represent maximum discharge power) and maximum PDC2DC1Up(filled just, to represent maximum
Electrical power) between.
(1) it is that battery can be held when new energy equipment generated output subtracts the obtained dump power of load consumption power
The charge or discharge power received, that is, work as PDC2DC1For PDC2DC1LowTo PDC2DC1UpBetween a performance number when, can on the right of above formula
Think zero.
I) now when accumulator electric-quantity is less than or equal to 20%, in order to prevent battery is crossed from putting, PDC2DC1Can not be PDC2DC1LowArrive
PDC2DC1UpBetween arbitrary value, should have PDC2DC1≥PDC2DC1Charge, wherein PDC2DC1ChargeFor the charging of the slow charging to battery
Power (for just).At this moment PSetAC2DCSetting meet：
PSetAC2DC≥PRealDCLoad+PRealACLoad+PRealDC2DC2+PDC2DC1Charge-PRealWi-PRealSo
For the energy exchange for reducing microgrid and external electrical network as far as possible, can be set as follows：
Work as PRealDCLoad+PRealACLoad+PRealDC2DC2+PDC2DC1Charge-PRealWi-PRealSoWhen≤0, set：
PSetAC2DC=0
Work as PRealDCLoad+PRealACLoad+PRealDC2DC2+PDC2DC1Charge-PRealWi-PRealSoDuring ＞ 0, set：
PSetAC2DC≈PRealDCLoad+PRealACLoad+PRealDC2DC2+PDC2DC1Charge-PRealWi-PRealSo
Ii) now when accumulator electric-quantity be more than or equal to 90%, in order to prevent over-charging of battery, PDC2DC1Can not be PDC2DC1LowArrive
PDC2DC1UpBetween arbitrary value, should have PDC2DC1≤PDC2DC1Discharge, wherein PDC2DC1DischargeFor the slow electric discharge to battery
Discharge power (being negative).At this moment PSetAC2DCSetting meet：
PSetAC2DC≤PRealDCLoad+PRealACLoad+PRealDC2DC2+PDC2DC1Discharge-PRealWi-PRealSo
For the energy exchange for reducing microgrid and external electrical network as far as possible, can be set as follows：
Work as PRealDCLoad+PRealACLoad+PRealDC2DC2+PDC2DC1Discharge-PRealWi-PRealSoWhen >=0, set：
PSetAC2DC=0
Work as PRealDCLoad+PRealACLoad+PRealDC2DC2+PDC2DC1Discharge-PRealWi-PRealSoDuring ＜ 0, set：
PSetAC2DC≈PRealDCLoad+PRealACLoad+PRealDC2DC2+PDC2DC1Discharge-PRealWi-PRealSo
Iii) now when accumulator electric-quantity is more than 20% and less than 90%, battery is overcharged and crossed without consideration and puts, PDC2DC1
P can be takenDC2DC1LowTo PDC2DC1UpBetween arbitrary value, when taking suitable value, 0 is equal on the right of above formula.Therefore can directly it set：
PSetAC2DC=0
(2) when new energy equipment generated output, to subtract the obtained dump power of load consumption power smaller (negative),
Battery can not provide enough discharge powers i.e.：
PRealWi+PRealSo-PRealDCLoad-PRealACLoad-PRealDC2DC2＜ PDC2DC1low＜ 0, therefore PSetAC2DCBe arranged to：
PSetAC2DC≥PRealDCLoad+PRealACLoad+PRealDC2DC2+PDC2DC1Low-PRealWi-PRealSo＞ 0
I) now when accumulator electric-quantity is less than or equal to 20%, PDC2DC1Setting value should be greater than being equal to 0, ensure that battery does not enter
One step is discharged, at this moment PSetAC2DCBe set as：
PSetAC2DC≈PRealDCLoad+PRealACLoad+PRealDC2DC2+PDC2DC1Charge-PRealWi-PRealSo, wherein PDC2DC1Charge
For the charge power of the slow charging to battery (for just).
Ii) now when accumulator electric-quantity is more than 20%, PDC2DC1Can be PDC2DC1Low, battery discharges with peak power,
Electric energy is obtained from power network to reduce.At this moment PSetAC2DCIt is set as：
PSetAC2DC≈PRealDCLoad+PRealACLoad+PRealDC2DC2+PDC2DC1Low-PRealWi-PRealSo
(3) when new energy equipment generated output larger, the battery that subtracts the obtained dump power of load consumption power
Enough charge powers can not be provided i.e.：
PRealWi+PRealSo-PRealDCLoad-PRealACLoad-PRealDC2DC2＞ PDC2DC1Up＞ 0, therefore PSetAC2DCBe arranged to：
PSetAC2DC≤PRealDCLoad+PRealACLoad+PRealDC2DC2+PDC2DC1Up-PRealWi-PRealSo＜ 0
I) now when accumulator electric-quantity is more than or equal to 90%, PDC2DC1Setting value should be less than or equal to 0, ensure battery not
Further charge, at this moment PSetAC2DCBe set as：
PSetAC2DC≈PRealDCLoad+PRealACLoad+PRealDC2DC2+PDC2DC1Discharge-PRealWi-PRealSo, whereinFor the discharge power (being negative) slowly to be discharged to battery.
Ii) now when accumulator electric-quantity is less than 90%, PDC2DC1Can be PDC2DC1Up, battery charges with peak power, with
Reduce generation of electricity by new energy and feed back to power network.At this moment PSetAC2DCIt is set as：
PSetAC2DC≈PRealDCLoad+PRealACLoad+PRealDC2DC2+PDC2DC1Up-PRealWi-PRealSo
Connection 3 is embodied：
The power network or equipment of device connection have：New energy equipment, batteries to store energy equipment, electric automobile energy storage device
Loaded with alternating current-direct current.It is fewer than connection 1 to connect power network.
Control strategy：
First set unidirectional AC/DC modules and the second unidirectional DC/DC modules are operated under maximum power tracing control model.The
One two-way DC/DC modules are operated under dc bus voltage stabilizing control model.Unidirectional DC/AC modules are operated in AC voltage stabilizing control models
Under.Second two-way DC/DC modules are operated under flow of power control model, its flow of power setting value PSetDC2DC2(represented to be positive
Electric energy flows into electric automobile from dc bus) establishing method and connection 1 set two-way AC/DC flow of power value PSetAC2DC
It is similar：
PSetDC2DC2≈PRealWi+PRealSo-PRealDCLoad-PRealACLoad-PDC2DC1, P thereinRealWi、PRealSo、
PRealDCLoad、PRealACLoadAnd PDC2DC1Represent equivalent in meaning with connection one.Same PDC2DC1Value should be located at
PDC2DC1Low(being negative, represent maximum discharge power) and maximum PDC2DC1UpBetween (just, to represent maximum charge power).
(1) it is that battery can be held when new energy equipment generated output subtracts the obtained dump power of load consumption power
The charge or discharge power received, i.e. PDC2DC1Take PDC2DC1LowTo PDC2DC1UpIn some value when, the formula on the right is 0.
I) now when accumulator electric-quantity is less than or equal to 20%, in order to prevent battery is crossed from putting, PDC2DC1Can not be PDC2DC1LowArrive
PDC2DC1UpBetween arbitrary value, should have PDC2DC1≥PDC2DC1Charge, wherein PDC2DC1ChargeFor the charging of the slow charging to battery
Power (for just).At this moment PSetDC2DC2Setting should meet：
PSetDC2DC2≤PRealWi+PRealSo-PRealDCLoad-PRealACLoad-PDC2DC1Charge
For the energy exchange for reducing battery and electric automobile as far as possible, can be set as follows：
Work as PRealWi+PRealSo-PRealDCLoad-PRealACLoad-PDC2DC1ChargeWhen >=0, set：PSetDC2DC2=0
Work as PRealWi+PRealSo-PRealDCLoad-PRealACLoad-PDC2DC1ChargeDuring ＜ 0, set：
PSetDC2DC2≈PRealWi+PRealSo-PRealDCLoad-PRealACLoad-PDC2DC1Charge
Ii) now when accumulator electric-quantity be more than or equal to 90%, in order to prevent over-charging of battery, PDC2DC1Can not be PDC2DC1LowArrive
PDC2DC1UpBetween arbitrary value, should have PDC2DC1≤PDC2DC1Discharge, wherein PDC2DC1DischargeFor the slow electric discharge to battery
Discharge power (being negative).At this moment PSetDC2DC2Setting meet：
PSetDC2DC2≥PRealWi+PRealSo-PRealDCLoad-PRealACLoad-PDC2DC1Discharge
For the energy exchange for reducing battery and electric automobile as far as possible, can be set as follows：
Work as PRealWi+PRealSo-PRealDCLoad-PRealACLoad-PDC2DC1DischargeWhen≤0, set：PSetDC2DC2=0
Work as PRealWi+PRealSo-PRealDCLoad-PRealACLoad-PDC2DC1DischargeDuring ＞ 0, set：
PSetDC2DC2≈PRealWi+PRealSo-PRealDCLoad-PRealACLoad-PDC2DC1Discharge
Iii) now when accumulator electric-quantity is more than 20% and less than 90%, battery is overcharged and crossed without consideration and puts, PDC2DC1
P can be takenDC2DC1LowTo PDC2DC1UpBetween arbitrary value, 0. is equal to when taking suitable value, on the right of above formula therefore can directly be set：
PSetDC2DC2=0
(2) when new energy equipment generated output, to subtract the obtained dump power of load consumption power smaller (negative),
Battery can not provide enough discharge powers i.e.：
PRealWi+PRealSo-PRealDCLoad-PRealACLoad＜ PDC2DC1Low＜ 0, therefore PSetDC2DC2Setting meet:
PSetDC2DC2≤PRealWi+PRealSo-PRealDCLoad-PRealACLoad-PDC2DC1Low＜ 0
I) now when accumulator electric-quantity is less than or equal to 20%, PDC2DC1Setting value should be greater than being equal to 0, ensure that battery does not enter
One step is discharged, at this moment PSetDC2DC2Be set as：
PSetDC2DC2≈PRealWi+PRealSo-PRealDCLoad-PRealACLoad-PDC2DC1Charge, wherein PDC2DC1ChargeFor to battery
Slow charging charge power (for just).
Ii) now when accumulator electric-quantity is more than 20%, PDC2DC1Can be PDC2DC1Low, battery discharges with peak power,
Electric energy is obtained from electric automobile to reduce.At this moment PSetDC2DC2It is set as：
PSetDC2DC2≈PRealWi+PRealSo-PRealDCLoad-PRealACLoad-PDC2DC1Low
(3) when new energy equipment generated output larger, the battery that subtracts the obtained dump power of load consumption power
Enough charge powers can not be provided i.e.：
PRealWi+PRealSo-PRealDCLoad-PRealACLoad＞ PDC2DC1Up＞ 0, therefore PSetDC2DC2Setting meet：
PSetDC2DC2≥PRealWi+PRealSo-PRealDCLoad-PRealACLoad-PDC2DC1Up＞ 0
I) now when accumulator electric-quantity is more than or equal to 90%, PDC2DC1Setting value should be less than or equal to 0, ensure battery not
Further charge, at this moment PSetDC2DC2Be set as：
PSetDC2DC2≈PRealWi+PRealSo-PRealDCLoad-PRealACLoad-PDC2DC1Discharge, wherein PDC2DC1DischargeFor to
The discharge power (being negative) that battery slowly discharges.
Ii) now when accumulator electric-quantity is less than 90%, PDC2DC1Can be PDC2DC1Up, battery charges with peak power.This
When PSetDC2DC2It is set as：
PSetDC2DC2≈PRealWi+PRealSo-PRealDCLoad-PRealACLoad-PDC2DC1Up。
Claims (3)
1. a kind of small-sized electric energy management includes with coordinating control integrated apparatus, the device：Energy management control unit, high frequency become
Depressor, the first AC-DC-AC converters, the 2nd AC-DC-AC converters, the first unidirectional DC/DC modules, the second unidirectional DC/DC moulds
Block, unidirectional AC/DC modules, two-way DC/DC modules, dc bus, and internal information logical circulation road, the external wind-power electricity generation system of device
System, photovoltaic generating system, battery energy storage system, electric automobile, alternating current-direct current load or external communication power network；
External electrical network is connected by the first AC-DC-AC converters with high frequency transformer, and high frequency transformer passes through the 2nd AC-DC- again
AC converters are connected with AC load；The dc bus is connected with DC circuit in the 2nd AC-DC-AC converters, described straight
Flow bus and electric energy is transmitted to DC load by the first unidirectional DC/DC modules, the wind generator system passes through unidirectional AC/DC moulds
Block transmits electric energy to dc bus, and the photovoltaic generating system transmits electric energy by the second unidirectional DC/DC modules to dc bus,
The dc bus is connected by the first two-way DC/DC modules with battery energy storage system, and the dc bus is two-way by second
DC/DC modules connect with electric automobile；The energy management control unit coordinates control modules according to running situation
Run, have module controller in modules, be responsible for the energy flow size and Orientation of control module.
2. a kind of small-sized electric energy management as claimed in claim 1 is with coordinating control integrated apparatus, it is characterised in that the energy
Amount management control unit control method be：
First, security control；
The control of DC/DC modules unidirectional to first, second：When the blocks current reverse flow, module overload, module are out of hand
When, respective modules are turned off, and show module exception；
Control to unidirectional AC/DC modules：When blocks current reverse flow, module overload, module are out of hand, shut-off is corresponding
Module, and show module exception；
The control of DC/DC modules two-way to first, second：When module flow through electric current be more than maximum load current when, module loses
During control, respective modules are turned off, and show module exception；
Second, module control
The specific controlling behavior that module control is carried out for modules under its controller action, these controls include:Unidirectional AC/
The control of the maximum power tracing of DC modules and the second unidirectional DC/DC modules, the dc bus voltage stabilizing control of the first two-way DC/DC modules
System, the control of the flow of power of the second two-way DC/DC modules and dc bus voltage stabilizing control, the dc bus of two-way AC/DC modules
Voltage stabilizing control, the flow of power control of two-way AC/DC modules and the AC voltage stabilizings control of unidirectional DC/AC modules；
3rd, energy management control unit coordinates control
Energy management control unit obtains each AC/DC modules, DC/DC modules, the controller of AC-DC-AC modules and sent in real time
The job information to come over, and the link information of the device and external equipment, then according to different situations, energy corresponding to implementation
Management control.
3. a kind of small-sized electric energy management as claimed in claim 1 is with coordinating control integrated apparatus, it is characterised in that it is described not
With in the case of specific control method be：
Connection 1：
The power network or equipment of device connection have：It is power network, solar power generation or wind power plant, batteries to store energy equipment, electronic
Automobile energy storage equipment and alternating current-direct current load；
Control strategy：Unidirectional AC/DC modules and the second unidirectional DC/DC modules are operated under maximum power tracing control model；The
Two two-way DC/DC modules are operated under flow of power control model to charging electric vehicle, if electric automobile energy storage device is electric
Energy underfill, charge power is set as a constant positive value, is otherwise 0；First two-way DC/DC modules are operated in dc bus voltage stabilizing
Under control model；Unidirectional DC/AC modules are operated under AC voltage stabilizing control models；Two-way AC/DC modules are operated in flow of power control
Under molding formula, its set value of the power is：
(1) when accumulator electric-quantity is between 20% to 90%, and new energy equipment generated output subtracts load consumption
The dump power that power obtains is the charge or discharge power that battery can be born：Set two-way AC/DC modular powers flowing
For 0, energy exchange is carried out to reduce microgrid and power network in family；
(2) when new energy equipment generated output subtracts, the obtained dump power of load consumption power is smaller, and battery can not
Enough discharge powers are provided：Set the flowing of two-way AC/DC modular powers for one on the occasion of；
(3) when new energy equipment generated output subtracts, the obtained dump power of load consumption power is larger, and battery can not
Enough charge powers are provided：It is a negative value to set two-way AC/DC modular powers flowing；
(4) when accumulator electric-quantity is less than 20%, it is ensured that battery is in charging shape when setting two-way AC/DC modular powers
State；
(5) when accumulator electric-quantity is more than 90%, it is ensured that battery is in electric discharge shape when setting two-way AC/DC modular powers
State；
Connection 2：
The power network or equipment of device connection have：Power network, batteries to store energy equipment, electric automobile energy storage device and alternating current-direct current load；
Fewer than connection 1 to connect new energy equipment, when new energy equipment does not generate electricity or corresponding module disconnects and also belonged to automatically
In the situation；
Control strategy：Now unidirectional AC/DC modules and the second unidirectional DC/DC modules do not work, and generation of electricity by new energy power is 0；Its
His control method and connection 1 is identical；
Connection 3：
The power network or equipment of device connection have：New energy equipment, batteries to store energy equipment, electric automobile energy storage device and friendship
DC load；It is fewer than connection 1 to connect power network；
Control strategy：
First set unidirectional AC/DC modules and the second unidirectional DC/DC modules are operated under maximum power tracing control model；First pair
It is operated in DC/DC modules under dc bus voltage stabilizing control model；Unidirectional DC/AC modules are operated under AC voltage stabilizing control models；
Second two-way DC/DC modules are operated under flow of power control model, its flow of power set value setting method as：
(1) when accumulator electric-quantity is between 20% to 90%, and new energy equipment generated output subtracts load consumption
The dump power that power obtains is the charge or discharge power that battery can be born：Second two-way DC/DC modular powers flowing
It is set as 0；
(2) when new energy equipment generated output subtracts, the obtained dump power of load consumption power is smaller, and battery can not
Enough discharge powers are provided：Second two-way DC/DC modular powers flowing is set as a negative value；
(3) when new energy equipment generated output subtracts, the obtained dump power of load consumption power is larger, and battery can not
Enough charge powers are provided：Second two-way DC/DC modular powers flowing be set as one on the occasion of, if battery charge power and
Charging electric vehicle power setting is still not able to balance flow of power, the unidirectional AC/DC moulds of new energy equipment to maximum
Block and the second unidirectional DC/DC modules stop maximum power tracing, are changed to power-balance point tracking；
(4) when accumulator electric-quantity is less than 20%, the second two-way DC/DC modular powers flowing setting is not it is ensured that battery is being located
In discharge condition；
(5) when accumulator electric-quantity is more than 90%, the second two-way DC/DC modular powers flowing setting is not it is ensured that battery is being located
In charged state, if at this moment electric automobile electricity is also filled with, unidirectional AC/DC modules of new energy equipment and second unidirectional
DC/DC modules stop maximum power tracing, are changed to power-balance point tracking；
Connection 4：
The power network or equipment of device connection have：Power network, new energy equipment, electric automobile energy storage device and alternating current-direct current load；
Connection batteries to store energy equipment fewer than connection 1, batteries to store energy equipment fault cause the first two-way DC/DC modules to disconnect
Belong to the situation；
Control strategy：
Unidirectional AC/DC modules and the second unidirectional DC/DC modules are operated in maximum power tracing control model；Second two-way DC/DC
Module is operated under flow of power control model to charging electric vehicle, if electric automobile energy storage device electric energy underfill, fills
Electrical power is one on the occasion of being otherwise 0；Unidirectional DC/AC modules are operated under AC voltage stabilizing control models；Two-way AC/DC modules work
Under dc bus voltage stabilizing control model.
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