CN108365627A - A kind of wind storage isolated network power supply system control method for coordinating based on flexible coordinating factor - Google Patents
A kind of wind storage isolated network power supply system control method for coordinating based on flexible coordinating factor Download PDFInfo
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- H02J3/386—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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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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- 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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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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
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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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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Abstract
The present invention discloses a kind of wind storage Isolated Network System control method for coordinating based on flexible coordinating factor, belongs to operation of power networks and control technology field.Its main feature is that including the following steps：1. obtaining the operating parameter of wind storage isolated network power supply system；2. establishing the coordination controlling mechanism of wind storage isolated network power supply system；Realize that the interbehavior between control intelligent body and lower unit decentralised control intelligent body is coordinated on upper layer by direct and indirect effect；3. calculating the flexible coordinating factor of wind storage isolated network power supply system power-balance；4. control intelligent body is coordinated on upper layer is assigned to lower layer's energy-storage units decentralised control intelligent body by flexible coordinating factor；5. energy storage inverter implements power control.The wind storage isolated network power supply system control method for coordinating based on flexible coordinating factor that the present invention uses, it can realize the coordination control of each unit in wind storage Isolated Network System, and ensure that the stabilization of wind storage Isolated Network System output voltage and frequency, the stable operation that Isolated Network System is stored up for wind provides technical basis and practical approach.
Description
Technical field
The present invention relates to the control method for coordinating that a kind of wind stores up isolated network power supply system, more particularly to a kind of to be coordinated based on flexible
The wind of the factor stores up isolated network power supply system control method for coordinating, belongs to operation of power networks and control technology field.
Background technology
In distributed energy power generation, wind-power electricity generation is that technology is most ripe, it is good most to have exploit condition, development prospect
Project.However, being received ability to be limited by bulk power grid, wind-powered electricity generation accesses existing during power grid " grid-connected difficulty " and " abandons on a large scale
The problems such as wind " as restrict Wind Power Development great difficult problem.For above-mentioned wind-electricity integration problem, domestic and international expert proposes wind storage connection
Close generation technology.With the reduction of energy storage device cost and the maturation of technology, wind stores up isolated network generation technology and stores up joint hair as wind
A kind of effective form of power technology can disperse for new energy and small-scale application provides the more flexible method of operation, and by
Walk the extensive attention by researcher.
The core technology of wind storage Isolated Network System stable operation is wind turbine output, wind turbine and energy storage inverter, energy storage discharge charge
Electricity converts triangular coordination control strategy.Influenced by natural environment and climate change, wind power output power have fluctuation,
Intermittent feature, due to the support of not no bulk power grid, during wind-powered electricity generation isolated operation, system power and frequency are susceptible to larger
Range fluctuates, it is difficult to meet the needs of load.In wind stores up Isolated Network System, the access of energy-storage units can be to solve by wind-powered electricity generation work(
Rate is fluctuated provides a kind of effective mode with the problems such as power swing in the system caused by load disturbance and frequency stability.
Grid-connected position, operating cost are concentrated mainly on to the research of wind storage system cooperation both at home and abroad at present, stablizes and transports
The control strategy etc. of row and different faults characteristic, and the research that Isolated Network System is stored up to wind is relatively fewer.Some documents are to wind
The method of operation and planning and configuration of the isolated micro-capacitance sensors such as storage are studied, it is proposed that the allocation plan of isolated micro-capacitance sensor and typical net
Network topological structure；Some documents are applied to the control mode of traditional power grid in isolated micro-capacitance sensor, propose the master for isolating micro-capacitance sensor
From control method and reciprocity control strategy；Also some research institutions establish the experimental system of isolated micro-capacitance sensor, from physics mould
Multiple angles such as Computer Simulation are fitted, the feasibility of wind storage isolated network power supply system is demonstrated, but are limited to control method and control
Strategy needs further improvement, practical horizontal to improve.The key problem that power supply system stable operation is isolated in wind storage exists
In：After losing bulk power grid support, under the conditions of various external disturbances, system will lean on the regulating power of itself, restore stable operation
State.In traditional control mode, the adjusting of power depends on bulk power grid, micro-capacitance sensor itself unwise to the variation of external condition
Sense, regulating power are limited.Under above-mentioned control mode, the running and comparing of wind storage system is fragile, there is fortune under severe conditions
The possibility of row failure is unfavorable for the commercialized running of wind storage system, poor practicability using having greater limitations.
The key solved the problems, such as is the demand for how tracking and responding AC system to power-balance, carries out coordination control.
The complexity of the control is, on the one hand, control strategy will adapt to the variation of a variety of operating conditions, as energy storage state, wind turbine go out
Power variation, system loading variation etc., operating condition is different, it is desirable that the power characteristic that energy storage control provides is also different, Er Qieqi
Characteristic is also related with the operating status of wind storage system.On the other hand, how each running unit in isolated network is stored up to wind to coordinate
And intelligent decision, it takes which kind of control model to establish and coordinates controlling mechanism, implement flexible control, and realize that wind stores up Isolated Network System
The critical issue of stable operation.
Invention content
It is an object of the invention to solve the above problem of the existing technology, provide a kind of based on flexible coordinating factor
Wind stores up the control method for coordinating of Isolated Network System.This control method for coordinating that the present invention uses has considered wind storage isolated network system
Various power-balance demands and operation in system constrain, being capable of coordination control more effective and that Isolated Network System is reliably stored up into sector-style
System, the stabilization coordinated operation that Isolated Network System is stored up for wind provide technical basis and practical approach.
The basic thought of this wind storage Isolated Network System flexibility self-start method proposed by the present invention is：Based on more intelligent skills
Art establishes the coordination controlling mechanism of wind storage Isolated Network System；Consider various power-balance demands, foundation meets system operation about
The flexible coordinating factor control program of beam；Based on above-mentioned control method, to improve the reliability and reality that wind stores up isolated network power supply system
The property used.
The technical solution adopted by the present invention is：
In the isolated power supply system that Wind turbines and energy storage device form, the online dynamic balance for calculating Isolated Network System
Power, and according to the service condition of system, using flexible coordinating factor to the power contorl parameters of each running unit into Mobile state
Adjustment, to realize that wind stores up the coordination control and stable operation of Isolated Network System.Its main feature is that including the following steps：
Step 1) obtains the operating parameter of wind storage isolated network power supply system；
Step 2) establishes the coordination controlling mechanism of wind storage isolated network power supply system；
(1) it establishes wind storage isolated network power supply system upper layer and coordinates control intelligent body；
(2) wind storage isolated network power supply system lower unit decentralised control intelligent body is established；
(3) interbehavior between control intelligent body and lower unit decentralised control intelligent body is coordinated by directly making in upper layer
With realization；
(4) interbehavior between control intelligent body is coordinated by making indirectly in lower unit decentralised control intelligent body and upper layer
With realization；
Step 3) calculates the flexible coordinating factor of wind storage isolated network power supply system power-balance；
(1) coordination control intelligent body in upper layer samples the active power of wind storage Isolated Network System lower unit intelligent body；
(2) control intelligent body calculated equilibrium power deviation is coordinated on upper layer；
(3) judge to balance whether power deviation is more than power coordination control threshold values, if balance power deviation is assisted more than power
Regulation and control threshold values processed, carries out step (4)；Otherwise step (1) is gone to；
(4) balance power deviation is assigned to each energy-storage units, obtains flexible coordinating factor；
Coordinate control intelligent body and flexible coordinating factor is assigned to lower layer's energy-storage units decentralised control intelligence in step 4) upper layer
Body；
Step 5) energy storage inverter implements power control.
It refers to the independent ac power supply system being made of Wind turbines and energy-storage system that wind, which stores up isolated network power supply system,.
The operating parameter for obtaining wind storage Isolated Network System refers to the active power, reactive power, energy storage system of Wind turbines output
The power grids such as the state-of-charge of system, load power, ac bus voltage, the frequency of wind storage Isolated Network System are calculated and are controlled required
Parameter.
The coordination controlling mechanism for establishing wind storage isolated network power supply system refers in wind stores up Isolated Network System, using based on mostly intelligent
The control technology of body carries out the coordination control between wind power, energy storage power and load power；
It refers to intelligent the concentrating for establishing wind storage Isolated Network System to establish wind storage isolated network power supply system upper layer to coordinate control intelligent body
Control module, realization are communicated and data acquisition function with lower unit decentralised control intelligent body, and according to System History with
Current operating conditions carry out analysis and decision, and coordination control instruction are distributed to lower unit decentralised control intelligent body；
It refers in wind power generating set, energy-storage units to establish wind storage isolated network power supply system lower unit decentralised control intelligent body
With increase independent intelligent control module in load, realize the data acquisition of each dispersal unit, power control, coordinate to control with upper layer
The functions such as the communication of intelligent body processed；
Coordinate control intelligent body to calculate power-balance deviation to refer to progress power-balance deviation calculating as follows in upper layer：
Δ P=KLPLOAD-KWPW-PB-KFΔF
Wherein：Δ P indicates system coordination active power balance and maintains required balance work(during system frequency
Rate difference；PLOADThe burden with power power in isolated network power supply system is stored up for wind；PWThe Wind turbines in isolated network power supply system are stored up for wind
Active power；KLFor load power adjustment parameter, value coordinates control intelligent body according to system history data and current by upper layer
Operating status is analyzed and predicted and obtains；KWFor wind power adjustment parameter, value coordinates control intelligent body according to being by upper layer
Historical data of uniting and current operating conditions, are analyzed and predicted and obtain；PBEnergy-storage units in isolated network power supply system are stored up for wind to fill
Discharge power and；Δ F is system frequency deviation；KFThe unit power regulation of isolated network power supply system is stored up for wind.
Balance power deviation is assigned to each energy-storage units, it refers to carrying out power by following constraint to obtain flexible coordinating factor
Distribution：
Wherein：Δ P indicates system coordination active power balance and maintains required balance work(during system frequency
Rate difference；ΔPiI-th of energy-storage units power regulation amount, the i.e. flexible coordinating factor of distribution power in Isolated Network System are stored up for wind；
PBiFor the instantaneous power of i-th of energy-storage units；PBi maxFor the instantaneous charge or discharge power threshold of i-th of energy-storage units.
Compared with prior art, beneficial effects of the present invention are：
1. the wind based on flexible coordinating factor stores up isolated network power supply system control method for coordinating, the system operation can be improved
Reliability.Traditional control method only implements constant frequency and Isobarically Control by energy-storage system, cannot be to the anti-of change of external conditions
Answer it is insensitive, between each control unit lack coordinate, cause in operational process mismatch power it is larger, transient state impact it is also larger.This
Invention improves the reliability of system operation by coordinating control and the flexible control factor to reduce the impact of imbalance power.
2. this method is easy to implement.This method is to establish coordination control on the basis of original wind stores up isolated network controlling unit and refer to machine
System and logic, the calculating of the flexible control factor is succinctly effective, the parameter and data of original control system is maximumlly utilized, from control
It is easy to implement in system.
3. this method is convenient for commercial development.As what wind storage Isolated Network System was applied increases, the control strategy of the system
Necessarily there is larger demand, the present invention to have preferable commercial exploitation prospects for exploitation.
Description of the drawings
Fig. 1 is wind storage Isolated Network System schematic diagram；
Fig. 2 is that MAS control is intended to；
Fig. 3 is that the wind storage Isolated Network System based on flexible coordinating factor coordinates control instruction flow chart schematic diagram；
Fig. 4 is the ac bus lateral load active power simulation curve of the wind storage Isolated Network System based on flexible coordinating factor
Figure.
Fig. 5 is the system exchange side frequency simulation curve figure of the wind storage Isolated Network System based on flexible coordinating factor.
Fig. 6 is the AC load side output three-phase current simulation curve of the wind storage Isolated Network System based on flexible coordinating factor
Figure.
Fig. 7 is the AC load side output three-phase voltage simulation curve of the wind storage Isolated Network System based on flexible coordinating factor
Figure.
Specific implementation mode
Technical scheme of the present invention is described in further details with emulation experiment below in conjunction with the accompanying drawings.
As shown in figs. 1-7, a kind of wind storage isolated network power supply system control method for coordinating based on flexible coordinating factor, including with
Lower step：
Step 1) obtains the operating parameter of wind storage isolated network power supply system；
Step 2) establishes the coordination controlling mechanism of wind storage isolated network power supply system；
(1) it establishes wind storage isolated network power supply system upper layer and coordinates control intelligent body；
(2) wind storage isolated network power supply system lower unit decentralised control intelligent body is established；
(3) interbehavior between control intelligent body and lower unit decentralised control intelligent body is coordinated by directly making in upper layer
With realization；
(4) interbehavior between control intelligent body is coordinated by making indirectly in lower unit decentralised control intelligent body and upper layer
With realization；
Step 3) calculates the flexible coordinating factor of wind storage isolated network power supply system power-balance；
(1) coordination control intelligent body in upper layer samples the active power of wind storage Isolated Network System lower unit intelligent body；
(2) control intelligent body calculated equilibrium power deviation is coordinated on upper layer；
(3) judge to balance whether power deviation is more than power coordination control threshold values, if balance power deviation is assisted more than power
Regulation and control threshold values processed, carries out step (4)；Otherwise step (1) is gone to；
(4) balance power deviation is assigned to each energy-storage units, obtains flexible coordinating factor；
Coordinate control intelligent body and flexible coordinating factor is assigned to lower layer's energy-storage units decentralised control intelligence in step 4) upper layer
Body；
Step 5) energy storage inverter implements power control；
It refers to the independent ac power supply system being made of Wind turbines and energy-storage system that wind, which stores up isolated network power supply system,.
The operating parameter for obtaining wind storage Isolated Network System refers to the active power, reactive power, energy storage system of Wind turbines output
The power grids such as the state-of-charge of system, load power, ac bus voltage, the frequency of wind storage Isolated Network System are calculated and are controlled required
Parameter.
The coordination controlling mechanism for establishing wind storage isolated network power supply system refers in wind stores up Isolated Network System, using based on mostly intelligent
The control technology of body carries out the coordination control between wind power, energy storage power and load power；
It refers to intelligent the concentrating for establishing wind storage Isolated Network System to establish wind storage isolated network power supply system upper layer to coordinate control intelligent body
Control module, realization are communicated and data acquisition function with lower unit decentralised control intelligent body, and according to System History with
Current operating conditions carry out analysis and decision, and coordination control instruction are distributed to lower unit decentralised control intelligent body；
It refers in wind power generating set, energy-storage units to establish wind storage isolated network power supply system lower unit decentralised control intelligent body
With increase independent intelligent control module in load, realize the data acquisition of each dispersal unit, power control, coordinate to control with upper layer
The functions such as the communication of intelligent body processed.
Coordinate control intelligent body to calculate power-balance deviation to refer to progress power-balance deviation calculating as follows in upper layer：
Δ P=KLPLOAD-KWPW-PB-KFΔF
Wherein：Δ P indicates system coordination active power balance and maintains required balance work(during system frequency
Rate difference；PLOADThe burden with power power in isolated network power supply system is stored up for wind；PWThe Wind turbines in isolated network power supply system are stored up for wind
Active power；KLFor load power adjustment parameter, value coordinates control intelligent body according to system history data and current by upper layer
Operating status is analyzed and predicted and obtains；KWFor wind power adjustment parameter, value coordinates control intelligent body according to being by upper layer
Historical data of uniting and current operating conditions, are analyzed and predicted and obtain；PBEnergy-storage units in isolated network power supply system are stored up for wind to fill
Discharge power and；Δ F is system frequency deviation；KFThe unit power regulation of isolated network power supply system is stored up for wind.
Balance power deviation is assigned to each energy-storage units, it refers to carrying out power by following constraint to obtain flexible coordinating factor
Distribution：
Wherein：Δ P indicates system coordination active power balance and maintains required balance work(during system frequency
Rate difference；ΔPiI-th of energy-storage units power regulation amount, the i.e. flexible coordinating factor of distribution power in Isolated Network System are stored up for wind；
PBiFor the instantaneous power of i-th of energy-storage units；PBi maxFor the instantaneous charge or discharge power threshold of i-th of energy-storage units.
Fig. 1 is wind storage Isolated Network System schematic diagram, and the system composition of wind storage Isolated Network System includes mainly：Wind generator system,
Energy-storage units and load etc..
Independent wind storage micro-grid system mainly by wind-driven generator, rectification and inverse control system, energy-storage system and exchanges
Load forms；Energy-storage system is connected to as energy conversion device on ac bus, can both store Wind turbines send out it is more
Remaining electricity, stabilizing system power swing and improvement power quality, and can power to load under extreme weather conditions, maintain system
The stabilization of system voltage and frequency ensures the power supply quality of wind storage Isolated Network System to meet the power requirement of load.However, by wind-force
The influence of resource randomness, fluctuation and Wind turbines self character, single independent wind store up micro-grid system operational reliability
Difference.For such situation, multiple Wind turbines or Wind turbines can be combined with other regenerative resources for independent micro-
In network system, to solve the problems, such as that single independent micro-grid system operational reliability is poor.
The structural schematic diagram that wind stores up Isolated Network System is as shown in Figure 1.Wind stores up Isolated Network System mainly by wind generator system, energy storage
Unit and load form.Compared with double-fed wind power generator group, direct-drive permanent magnet wind power generator group is because saving brush, slip ring and tooth
Roller box improves the reliability of system to greatly reduce the maintenance cost of system, and Wind turbines herein use direct-drive permanent-magnetism
Wind power generating set.
Wind store up Isolated Network System in, directly-drive permanent magnet wind generating system mainly by wind energy conversion system, direct-drive permanent magnet wind power generator,
Pusher side rectifier, net side inverter and filter composition；Energy-storage units are mainly by accumulator, DC/DC bidirectional converters, energy storage
Inverter and filter composition, direct-drive permanent magnet wind power generator power to the load by ac bus jointly with energy-storage units.
It is as follows that wind stores up the Isolated Network System course of work：Wind energy conversion system captures maximum machine power from natural wind, and by generation
Mechanical output sends generating set to by main shaft, and the electricity that generating set is sent out passes through back-to-back converter control circuit and filtering
Device powers to the load；And energy-storage units control each of energy storage inverter by acquiring ac bus side voltage and current signals
The break-make of bridge arm inhibits the fluctuation of the wind power output power caused by the mutation of wind speed to reach, meanwhile, energy-storage units may be used also
Using as stand-by power supply, when wind power output is excessive, energy-storage units can absorb the surplus power that wind-powered electricity generation is sent out；Work as wind power output
When too small, the power that energy-storage units can convey storage powers to the load.
Fig. 2 is that MAS control is intended to；" multiple agent " generally refers exclusively to multi-agent system (or multi-agent Technology.
Multi-agent system is an important branch of distributed artificial intelligence, is at the end of the 20th century to artificial intelligence in the world at the beginning of 21 century
Front subject.The purpose of research is to solve large-scale and complex realistic problem, and such issues that solve has had exceeded single intelligence
The ability of energy body.Multi-agent system is the set of multiple intelligent body compositions, its target is by big and the system Construction of complexity
At it is small, each other communicate and coordinate, the system being easily managed.The research of multiple agent is related to knowledge, the mesh of intelligent body
Mark, technical ability, planning and how to make intelligent body take concerted efforts to solve the problems, such as.Interaction between main research intelligent body is logical
Letter, coordination, conflict resolution etc. emphasize the cooperation of close group rather than individual capability between multiple intelligent bodies oneself
It controls and plays, mainly illustrate how that analysis, design and integrated multiple intelligent bodies constitute co-operating system.
Multi-agent Technology be coordination between independent behaviour and each unit intelligent body by each intelligent body, control and
Scheduling etc. come realize system function behavioural characteristic.As an important branch of artificial intelligence system, multi-agent Technology
Become following focus on research direction because can be good at solving coordination control and the communication issue of control system.Based on more
The plurality of advantages of intelligent agent technology, tradition can not only be solved in the coordination control of wind storage Isolated Network System by, which being applied to, coordinates to calculate
Method is existing to communicate lag issues, can also be layered the coordination control for realizing wind storage Isolated Network System.
Wind storage Isolated Network System based on multi-agent Technology, which coordinates control, to be realized by two layers of intelligent body：Coordinate on upper layer
Control intelligent body, lower unit decentralised control intelligent body.In wind stores up Isolated Network System, lower unit intelligent body decentralised control is logical
It crosses inverter interface and the load ports of design wind generator system and energy-storage units to realize, the dispersion of lower unit intelligent body
Control mainly realizes wind generator system and energy-storage units each unit power and voltage output control in wind storage Isolated Network System, is
Power samples of uniting and ac bus voltage sample.Coordinate control intelligent body by being stored up under Isolated Network System to any time wind in upper layer
The active power sampled value and voltage sample value of layer unit intelligent body carry out correlation computations, are referred to by decision-making module and coordination control
It enables module publication action execute order, and lower unit decentralised control intelligent body is sent instructions to by communication channel.In wind
It storing up in Isolated Network System, there are interbehaviors between upper layer coordination control intelligent body and lower unit decentralised control intelligent body, and on
Layer coordinate control intelligent body and lower unit decentralised control intelligent body between interbehavior be by directly acting on realization, under
The interbehavior that layer unit decentralised control intelligent body and upper layer are coordinated between control intelligent body is realized by indirectly-acting.Upper layer
Coordinate control intelligent body and lower unit decentralised control intelligent body interactive process.It is supplied in the wind storage isolated network based on flexible coordinating factor
In electric system, lower unit decentralised control intelligence physical efficiency realizes the perception and interaction of lower unit and external environment, can also be real
The control of each unit intelligent body in existing wind storage Isolated Network System, to ensure that the steady of wind storage Isolated Network System output voltage and frequency
It is fixed.At the same time, upper layer coordinate control intelligent body can realize in lower unit decentralised control intelligent body each unit operation and
Active power difference in the case of disturbance is judged, and control instruction module publication action executes order, when lower unit point
It is automatically controlled into charge and discharge is carried out to energy-storage system after dissipating the action execution order that control intelligent body receives upper layer coordination control intelligent body
System, to realize that wind stores up the coordinated operation of Isolated Network System；
Fig. 3 is that the wind storage Isolated Network System based on flexible coordinating factor coordinates control instruction flow chart schematic diagram；
After the principle and alternate acknowledge process of wind storage Isolated Network System based on multi-agent Technology, how to realize based on more intelligence
The design that the wind storage Isolated Network System of energy body technique coordinates control instruction is the key that ensure wind storage Isolated Network System coordinated operation.In wind
It stores up active power in Isolated Network System and coordinates the generation of control instruction mainly by the active balance power of upper layer coordination control intelligent body
The modules such as flow indicator calculates module, decision-making module and coordination control instruction determine that the wind based on multi-agent Technology stores up Isolated Network System
It is as follows to coordinate control instruction generating process：Coordinate control intelligent body by storing up Isolated Network System lower unit to any time wind in upper layer
The active power sampled value of intelligent body is made the difference and is judged, and by decision-making module and coordinate control instruction module provide it is two-way
The trigger signal control instruction of DC/DC current transformer charge/discharge；Upper layer, which is received, in lower unit decentralised control intelligent body coordinates control
After the action of intelligent body processed executes order, the charge and discharge of layer and conversion zone control energy-storage system through consultation.It is as follows：
(1) operating parameter of wind storage isolated network power supply system is obtained；
(2) the coordination controlling mechanism of wind storage isolated network power supply system is established；
(3) the flexible coordinating factor of wind storage isolated network power supply system power-balance is calculated；
1) coordination control intelligent body in upper layer samples the active power of wind storage Isolated Network System lower unit intelligent body；
2) control intelligent body calculated equilibrium power deviation is coordinated on upper layer；
3) judge to balance whether power deviation is more than power coordination control threshold values, if balance power deviation is more than power coordination
Threshold values is controlled, step 4) is carried out；Otherwise step 1) is gone to；
4) balance power deviation is assigned to each energy-storage units, obtains flexible coordinating factor；
(4) flexible coordinating factor is assigned to lower layer's energy-storage units decentralised control intelligent body by upper layer coordination control intelligent body；
(5) energy storage inverter implements power control；
It is that the wind that Major Systems are constituted stores up to be built with Wind turbines, energy-storage units and load according to the system block diagram in Fig. 1
Isolated network model, wherein wind generator system use direct-drive permanent magnet wind power generator group, because that can save brush, pulley and gear-box
Deng, can greatly reduce system maintenance cost and improve system reliability.
Wind generator system in wind storage Isolated Network System based on flexible coordinating factor is mainly using back-to-back unsteady flow
The control strategy of device, wind generator system back-to-back converter include mainly generator side rectifier and net side inverter, pusher side
It is connected by DC bus capacitor between rectifier and net side inverter.The main function of generator side rectifier is to realize generator
The control of active power, to reduce the power attenuation of generator；The main function of net side inverter is to realize net side power factor
Adjustment or Reactive Power Control, provide steady dc voltage control, and net side inverter is using outer voltage and current inner loop
PQ control strategies.
Energy-storage units are become according to energy storage inverter and two-way DC/DC in wind storage Isolated Network System based on flexible coordinating factor
Device collaborative work is flowed to realize the coordination control of energy-storage units active power and maintain the stabilization of ac bus side voltage and frequency.Its
In two-way DC/DC current transformers use outer voltage and current inner loop control strategy, energy storage inverter use droop control pattern.
Wherein energy-storage units Agent is designed in energy storage inverter interface, to realize energy-storage units power and the output control of voltage, system
Power samples and voltage sample.
According to above-mentioned control strategy and model selection statement, system emulation is carried out in Matlab/Simulink platforms
Model is built.Basic parameter is set as：Rated wind speed 12m/s, it is 25kW, ac bus side that wind turbine, which exports rated active power,
The initial active power of load be 40kW, reactive power 0kVar, the initial value of storage battery charge state is 80%, when emulation
Between be 2s.
In simulation process, the load active power of exchange side is reduced to 30KW by stable operation in preceding 1s, the 1s moment,
Ac bus lateral load is restored to initial active power 40KW after 1.5s.Before 1s, system is in steady operational status.In 1s
When, ac bus side load is reduced to 30KW, in the moment of sudden load change, frequency fluctuation amplitude reduce, AC load side it is defeated
Going out electric current also therewith to reduce, the three-phase voltage of AC load side output has in a flash a slight oscillatory what 1s loads were reduced, but because
Model buildings reactive power parameter is 0, and multiple agent interacts in storing up isolated network power supply system based on the wind of flexible coordinating factor
The three-phase voltage of Principle System safety and stability, output restores steady operational status.After 1.5s, ac bus lateral load is restored to just
The frequency fluctuation amplitude of beginning active power 40KW, ac bus side are consistent with steady operational status before 1s, the output of AC load side
Three-phase current is restored to original numerical value.Therefore it could be assumed that, wind of this patent based on flexible coordinating factor stores up isolated network power supply system
Control method for coordinating validity.
Claims (8)
- Refer in Wind turbines and energy storage 1. a kind of wind based on flexible coordinating factor stores up isolated network power supply system control method for coordinating In the isolated power supply system of device composition, the online dynamic balance power for calculating Isolated Network System, and according to the operation item of system Part adjusts the power contorl parameters of each running unit into Mobile state using flexible coordinating factor, to realize wind storage isolated network system The coordination control and stable operation of system；It is characterized in that：Include the following steps：Step 1) obtains the operating parameter of wind storage isolated network power supply system；Step 2) establishes the coordination controlling mechanism of wind storage isolated network power supply system；(1) it establishes wind storage isolated network power supply system upper layer and coordinates control intelligent body；(2) wind storage isolated network power supply system lower unit decentralised control intelligent body is established；(3) interbehavior between control intelligent body and lower unit decentralised control intelligent body is coordinated by directly acting on reality in upper layer It is existing；(4) lower unit decentralised control intelligent body and upper layer coordinate the interbehavior between control intelligent body and pass through indirectly-acting reality It is existing；Step 3) calculates the flexible coordinating factor of wind storage isolated network power supply system power-balance；(1) coordination control intelligent body in upper layer samples the active power of wind storage Isolated Network System lower unit intelligent body；(2) control intelligent body calculated equilibrium power deviation is coordinated on upper layer；(3) judge to balance whether power deviation is more than power coordination control threshold values, if balance power deviation is more than power coordination control Threshold values processed carries out step (4)；Otherwise step (1) is gone to；(4) balance power deviation is assigned to each energy-storage units, obtains flexible coordinating factor；Coordinate control intelligent body and flexible coordinating factor is assigned to lower layer's energy-storage units decentralised control intelligent body in step 4) upper layer；Step 5) energy storage inverter implements power control.
- 2. a kind of wind based on flexible coordinating factor according to claim 1 stores up isolated network power supply system control method for coordinating, It is characterized in that：Step 1) apoplexy storage isolated network power supply system refers to independent exchanging confession by what Wind turbines and energy-storage system formed Electric system.
- 3. a kind of wind based on flexible coordinating factor according to claim 1 stores up isolated network power supply system control method for coordinating, It is characterized in that：The operating parameter that step 1) obtains wind storage Isolated Network System refers to the active power of Wind turbines output, idle work( Rate, the state-of-charge of energy-storage system, wind store up the power grids such as load power, ac bus voltage, the frequency of Isolated Network System and calculate and control Make required parameter.
- 4. a kind of wind based on flexible coordinating factor according to claim 1 stores up isolated network power supply system control method for coordinating, It is characterized in that：The coordination controlling mechanism that wind storage isolated network power supply system is established in step 2) refers to being adopted in wind stores up Isolated Network System With the control technology based on multiple agent, the coordination control between wind power, energy storage power and load power is carried out.
- 5. a kind of wind based on flexible coordinating factor according to claim 1 stores up isolated network power supply system control method for coordinating, It is characterized in that：It refers to establishing wind storage Isolated Network System that step 2), which establishes wind storage isolated network power supply system upper layer to coordinate control intelligent body, Intelligent centralized control module, realization are communicated and data acquisition function with lower unit decentralised control intelligent body, and according to being History of uniting and current operating conditions carry out analysis and decision, and coordination control instruction are distributed to lower unit decentralised control intelligence It can body.
- 6. a kind of wind based on flexible coordinating factor according to claim 1 stores up isolated network power supply system control method for coordinating, It is characterized in that：It refers in wind power generating set, energy storage to establish wind storage isolated network power supply system lower unit decentralised control intelligent body Increase independent intelligent control module in unit and load, realizes that data acquisition, power control and the upper layer of each dispersal unit are assisted The functions such as the communication of regulation and control intelligent body processed.
- 7. a kind of wind based on flexible coordinating factor according to claim 1 stores up isolated network power supply system control method for coordinating, It is characterized in that：Coordinate control intelligent body to calculate power-balance deviation to refer to carrying out power-balance drift gage as follows in upper layer It calculates：Δ P=KLPLOAD-KWPW-PB-KFΔFWherein：Δ P indicates system coordination active power balance and maintains required balance difference power during system frequency Value；PLOADThe burden with power power in isolated network power supply system is stored up for wind；PWIt is active that the Wind turbines in isolated network power supply system are stored up for wind Power；KLFor load power adjustment parameter, value coordinates control intelligent body according to system history data and current operation by upper layer State is analyzed and predicted and obtains；KWFor wind power adjustment parameter, value is coordinated control intelligent body by upper layer and is gone through according to system History data and current operating conditions, are analyzed and predicted and obtain；PBEnergy-storage units charge and discharge in isolated network power supply system are stored up for wind Power and；Δ F is system frequency deviation；KFThe unit power regulation of isolated network power supply system is stored up for wind.
- 8. a kind of coordination controlling party of wind storage isolated network power supply system based on flexible coordinating factor according to claim 1 Method, it is characterised in that：Balance power deviation is assigned to each energy-storage units, obtain flexible coordinating factor refer to by it is following constrain into Row power distribution：Wherein：Δ P indicates system coordination active power balance and maintains required balance difference power during system frequency Value；ΔPiI-th of energy-storage units power regulation amount, the i.e. flexible coordinating factor of distribution power in Isolated Network System are stored up for wind；PBiFor The instantaneous power of i-th of energy-storage units；PBi maxFor the instantaneous charge or discharge power threshold of i-th of energy-storage units.
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