CN106887840A - A kind of microgrid control system - Google Patents
A kind of microgrid control system Download PDFInfo
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- CN106887840A CN106887840A CN201710176630.8A CN201710176630A CN106887840A CN 106887840 A CN106887840 A CN 106887840A CN 201710176630 A CN201710176630 A CN 201710176630A CN 106887840 A CN106887840 A CN 106887840A
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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
-
- 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
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention proposes a kind of microgrid control system, the technical problem of the coordination ability difference existed present in prior art in micro-grid system and between microgrid and bulk power grid for solving, including multiple distributed power sources, multiple current transformers, multiple micro source controllers, AC power distribution cabinet/AC distribution panel, multiple load controllers, multiple load and central controller, multiple distributed power sources are respectively connected by a current transformer and a micro source controller with AC power distribution cabinet/AC distribution panel, AC power distribution cabinet/AC distribution panel is connected by bus with central controller, multiple load is respectively connected by a load controller with bus, when central controller breaks down, one of micro source controller can be used as standby master controller.The present invention is good with system coordination, and flexibility is good, and stability is high, practical, is easy to the characteristics of promoting the use of, and disclosure satisfy that the operation control of current microgrid is required.
Description
Technical field
The invention belongs to micro-capacitance sensor technical field, it is related to a kind of microgrid control system, can be used for the Comprehensive Control to microgrid
With protection.
Background technology
As international community is to the pay attention to day by day of energy shortage problem, the distributed power generation skill with wind-powered electricity generation, photovoltaic as representative
Art is developed rapidly, the important component as generation current field.The renewable distributed power generation such as wind energy, solar energy
The energy has the features such as unstability, generating fluctuation and difficult control in itself, and simple access bulk power grid will certainly be to existing
Power network cause larger impact.In order to solve conflicting between distributed power source and bulk power grid, micro-capacitance sensor is set up in proposition.Micro- electricity
Net is also referred to as microgrid, refers to be combined together distributed power source, energy storage device, control and protection device, takes corresponding control
Strategy is load supplying.Compared with traditional power network, microgrid possesses very big flexibility and uniqueness, but operation is complicated.Microgrid
The flexible method of operation and high-quality electric service, be unable to do without perfect control system.
Current microgrid control system mainly uses peering structure and host-guest architecture.
Peering structure, each distributed power source status is equal in microgrid, in the absence of the main control list for playing main support
Unit.It is independent to participate in the regulation and control of voltage and frequency using the microgrid of peering structure, and the operation of other distributed power sources need not be considered
Situation, thus also without communication.On the basis of energy balance, any one distributed power source in microgrid is accessed or moved back
Go out, it is not necessary to change other units in microgrid.But in islet operation, between the voltage and frequency and its rated value of microgrid always
There is a certain degree of deviation, the error is difficult to eliminate, and the reliability of system does not rely on communication system or a certain power supply,
Lack control measures unifiedly and flexibly, the coordination ability is poor.
Host-guest architecture, using a micro battery as main control unit, its controller as master controller, remaining micro battery
Controller is used as from controller.Because host-guest architecture is too strong for main control unit dependence, on the one hand because main control list
Unit pondage it is limited, once on the other hand because main control unit break down, whole system in islet operation, just
It is not normally functioning.Such as Authorization Notice No. is CN 203552029U, a kind of entitled " microgrid based on distributed director
The Chinese patent of control system ", discloses a kind of microgrid control system based on distributed director, including central controller,
Local controller, communication unit and human-computer interaction device, realize the effective monitoring and optimization operation to microgrid node, but deposit
Deficiency be that too strong for central control unit dependence, the coordination ability is poor in micro-grid system.
The content of the invention
It is an object of the invention to overcome the shortcomings of that above-mentioned prior art is present, it is proposed that a kind of microgrid control system, use
Asked in the technology of the coordination ability difference for solving to exist in micro-grid system present in prior art and between microgrid and bulk power grid
Topic.
To achieve the above object, the technical scheme taken of the present invention is：
A kind of microgrid control system, including multiple distributed power sources, AC power distribution cabinet/AC distribution panel, multiple loads and controller, it is described
Controller includes central controller, multiple current transformers, multiple micro source controllers and multiple load controllers, the multiple distribution
Formula power supply is respectively connected by a current transformer and a micro source controller with AC power distribution cabinet/AC distribution panel, and the AC power distribution cabinet/AC distribution panel is by mother
Line is connected with central controller, and the multiple load is respectively connected by a load controller with bus, when central controller goes out
During existing failure, one of micro source controller can as standby master controller, wherein：
The current transformer, the AC or DC electricity for distributed power source to be exported is converted to three-phase alternating current, and according to
Micro source controller is instructed, and the active power and reactive power of three-phase alternating current are transported into AC power distribution cabinet/AC distribution panel, while sending three
The electric voltage of cross streams, frequency and power signal；
The micro source controller, for the instruction issued according to central controller, hair is instructed by different control models
Connected current transformer is delivered to, voltage, frequency and the power signal sent to current transformer are adjusted；
Load operation conditions, for the instruction issued according to central controller, are controlled by the load controller；
The central controller, for when micro-capacitance sensor and bulk power grid are incorporated into the power networks, according to bulk power grid the need for, it is local negative
The generating capacity of load demand and distributed power source, to active power and the reactive power operation point of each distributed power source and each
The running status of load is selected, and the operating point of selection and load operation conditions information are sent to corresponding micro battery control
Device processed and load controller；When micro-capacitance sensor is detected into island operation state, control model is adjusted, and to each micro battery control
Device processed issues the instruction of switching control pattern.
A kind of microgrid control system, including multiple distributed power sources, AC power distribution cabinet/AC distribution panel, multiple loads and controller, also wrap
Protection circuit and the monitoring unit and wireless transport module that are connected with each other are included, the controller includes central controller, Duo Gebian
Stream device, multiple micro source controllers and multiple load controllers, the multiple distributed power source respectively pass through a current transformer and one
Individual micro source controller is connected with AC power distribution cabinet/AC distribution panel, and the protection circuit is connected between AC power distribution cabinet/AC distribution panel and central controller
On bus, the multiple load is respectively connected by a load controller with bus, the monitoring unit and wireless transport module
It is connected with AC power distribution cabinet/AC distribution panel, when central controller breaks down, one of micro source controller can be used as standby main control
Device, wherein：
The current transformer, the AC or DC electricity for distributed power source to be exported is converted to three-phase alternating current, and according to
Micro source controller is instructed, and the active power and reactive power of three-phase alternating current are transported into AC power distribution cabinet/AC distribution panel, while sending three
The electric voltage of cross streams, frequency and power signal；
The micro source controller, for the instruction issued according to central controller, hair is instructed by different control models
Connected current transformer is delivered to, voltage, frequency and the power signal sent to current transformer are adjusted；
Load operation conditions, for the instruction issued according to central controller, are controlled by the load controller；
The central controller, for when micro-capacitance sensor and bulk power grid are incorporated into the power networks, according to bulk power grid the need for, it is local negative
The generating capacity of load demand and distributed power source, to active power and the reactive power operation point of each distributed power source and each
The running status of load is selected, and the operating point of selection and load operation conditions information are sent to corresponding micro battery control
Device processed and load controller；When micro-capacitance sensor is detected into island operation state, control model is adjusted, and to each micro battery control
Device processed issues the instruction of switching control pattern；
The monitoring unit, monitor in real time is carried out for the working condition to AC power distribution cabinet/AC distribution panel and with electrical parameter, and will be former
Barrier information is sent to Surveillance center；
The wireless transport module, the monitoring data for monitoring unit to be monitored is sent to Surveillance center；
The protection circuit, for when failure occurs, being protected to load in real time.
The present invention compared with prior art, with advantages below：
1st, the present invention is respectively matched somebody with somebody with exchanging due to multiple distributed power sources by a current transformer and a micro source controller
Electric cabinet is connected, and AC power distribution cabinet/AC distribution panel is connected by bus with central controller, and multiple load is respectively by a load controller and mother
Line is connected, when being incorporated into the power networks, according to bulk power grid the need for, the generating capacity of local loading demand and distributed power source, center
Controller sends control information to corresponding micro source controller and load controller, and each point is adjusted by micro source controller
The power output of cloth power supply and the running status of load, realize the power-balance in microgrid；Enter islet operation in microgrid
During state, adjustment control model, and the instruction of switching control pattern is issued to each micro source controller, adjust microgrid voltage and frequency
Rate reaches stabilization, realizes the balance of voltage and power-balance, when central controller breaks down, one of micro battery control
Device compared with prior art, can be effectively improved system coordination and stability as standby master controller.
2nd, the present invention can be with the increase of distributed power source, it is only necessary to be equipped with new current transformer to newly-increased distributed power source
And micro source controller, it is practical with good open and compatibility, it is easy to promote the use of.
Brief description of the drawings
Fig. 1 is the structural representation of first embodiment of the invention；
Fig. 2 is the structural representation of second embodiment of the invention.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Embodiment 1
Reference picture 1, a kind of microgrid control system, including multiple distributed power sources, multiple current transformers, multiple micro battery controls
Device, AC power distribution cabinet/AC distribution panel, multiple loads, multiple load controllers, and central controller.In the present embodiment multiple distributed power sources by
Photovoltaic generation unit, wind power generating set, Hydropower Unit, diesel engine unit and batteries into.
Photovoltaic generation unit is connected by a current transformer with the input of micro source controller, micro source controller it is defeated
Go out end to be connected with an input of AC power distribution cabinet/AC distribution panel.Wind power generating set is defeated with micro source controller by a current transformer
Enter end to be connected, the output end of micro source controller is connected with AC power distribution cabinet/AC distribution panel input；Hydropower Unit is by a change
Stream device is connected with the input of micro source controller, the output end of micro source controller and AC power distribution cabinet/AC distribution panel input phase
Even.Diesel engine unit is connected by a current transformer with the input of micro source controller, output end and the friendship of micro source controller
An input for flowing power distribution cabinet is connected.Battery is connected by a current transformer with the input of micro source controller, micro- electricity
The output end of source controller is connected with AC power distribution cabinet/AC distribution panel input.The output end of AC power distribution cabinet/AC distribution panel is connected with bus, female
Line connects central controller.Multiple load controllers are connected with bus, each load controller is connected with corresponding load.
The heterarchical architecture that the present embodiment is used, ground floor is the local key-course of microgrid, and the layer is main by micro battery
Controller and current transformer are constituted.The second layer, to coordinate key-course, that is, central controller, is the core of whole microgrid control system
Center portion point.According to the ruuning situation of whole microgrid, real-time optimal control strategy realizes the stable coordination fortune of each subsystem of microgrid
OK, the need for electricity of load is met.Local key-course is mainly responsible for the transient state control of microgrid, coordinates key-course and is responsible for the steady of microgrid
State is controlled and coordinated operation analysis.When central controller breaks down, one of micro source controller can be used as standby master
Controller.
Because different distributions formula power supply has completely different operation characteristic, output electric energy may be either ac or dc power.
In order to be powered to load stabilization, current transformer is used to for the AC or DC electricity that distributed power source is exported to be converted to three-phase alternating current.
Instructed according to micro source controller, the active power and reactive power of three-phase alternating current are transported to AC power distribution cabinet/AC distribution panel by current transformer,
Voltage, frequency and the power signal of three-phase alternating current are sent simultaneously；
Micro source controller, for the instruction issued according to central controller, different control model instructions is sent extremely
Connected current transformer, the voltage sent to current transformer, frequency and power signal are adjusted.In grid-connected running status
Under, directly using bulk power grid frequency and voltage as support, each micro source controller takes permanent work(for frequency and voltage in micro-capacitance sensor
Rate control model, realizes active power and reactive power that distributed power source is specified to transmission line of electricity output.In piconet island fortune
During row, using voltage/frequency control model, make the voltage and frequency stabilization of the output of each distributed power source in set-point.
Load operation conditions, for the instruction issued according to central controller, are controlled by load controller.In microgrid
During islet operation, the normal power supply for ensureing sensitive loads.
Central controller, for the synchronous operation of microgrid and bulk power grid, reduces the impact to system.When being incorporated into the power networks,
Microgrid can obtain voltage from bulk power grid and frequency support, it is only necessary to participate in power adjusting, according to bulk power grid the need for, it is local
The generating capacity of loading demand and distributed power source, active power and reactive power of the central controller to each distributed power source
Operating point and the running status of each load are selected, and the operating point of selection and load operation conditions information are sent to phase
The micro source controller and load controller answered.In islet operation, control model is adjusted, and issue to each micro source controller
The instruction of switching control pattern.By controlling each micro source controller, each distributed power source output nothing in micro-capacitance sensor had both been can guarantee that
The distribution of work(power and active power, can realize that systematic steady state is transported to transmission line of electricity output voltage and the electric energy of frequency stabilization again
OK.
Distributed power source and load is general relatively disperses, it is therefore desirable to which a reliable communication network is in central controller and respectively
Data are transmitted between micro source controller, with based on the communication protocols of IEC 61850/general object-oriented transformer substation case
(GOOSE) high-speed communication network is carrier.Can for example be adopted between each micro source controller, each load controller and central controller
Communicated with 485 communication cables or optical fiber.
Embodiment 2
Reference picture 2, the present embodiment is in the basic structure of embodiment 1, to be connected with monitoring in turn on AC power distribution cabinet/AC distribution panel
Unit and wireless transport module, protection circuit is connected with the bus between AC power distribution cabinet/AC distribution panel and central controller.
Wherein, monitoring unit, working condition for monitor in real time AC power distribution cabinet/AC distribution panel and with electrical parameter works as AC power distribution cabinet/AC distribution panel
Working condition, with electrical parameter or working condition and when being broken down with electrical parameter, wireless transport module sends fault message
To Surveillance center.
Improved as one kind of the present embodiment, in the basic structure of embodiment 1, the only connection monitoring on AC power distribution cabinet/AC distribution panel
Unit, working condition when AC power distribution cabinet/AC distribution panel, with electrical parameter or working condition and when being broken down with electrical parameter, monitoring unit will
Fault message is transferred to Surveillance center by wire transmission mode.
Protection circuit, for when occurring voltage pulsation in circuit more than scope is limited, being protected to load.
The above is only two embodiments of the invention, those skilled in the art will appreciate that, in the sheet for thus describing
In the range of invention, it can be envisaged that other embodiments.Additionally, it should be noted that the language used in this specification primarily to
Readable and teaching purpose and select, selected rather than in order to explain or limit subject of the present invention.Therefore, exist
It is many for those skilled in the art in the case of without departing from the scope of the appended claims and spirit
Modifications and changes will be apparent from.For the scope of the present invention, the disclosure done to the present invention is illustrative, rather than limit
Property processed, it is intended that the scope of the present invention be defined by the claims appended hereto.
It will be appreciated by those skilled in the art that element in accompanying drawing is just for the sake of showing for the sake of simple and clear,
And be not necessarily drawn to scale.For example, the size of some elements may be exaggerated relative to other elements in accompanying drawing, with
Just it is favorably improved the understanding to the embodiment of the present invention.
For clarity and conciseness, all features of actual implementation method are not described in the description.However, should
Understand, many decisions specific to implementation method must be made during any this practical embodiments are developed, so as to reality
The objectives of existing developer, for example, meet those restrictive conditions related to system and business, and these restrictive conditions
May be changed with the difference of implementation method.Additionally, it also should be appreciated that, although development is likely to be very multiple
It is miscellaneous and time-consuming, but for the those skilled in the art for having benefited from present disclosure, this development is only routine
Task.
Herein, in addition it is also necessary to which explanation is a bit, in order to avoid having obscured the present invention because of unnecessary details, in the accompanying drawings
Apparatus structure and/or the process step closely related with scheme of the invention is illustrate only, and is eliminated and the present invention
The little other details of relation.
Claims (2)
1. a kind of microgrid control system, including multiple distributed power sources, AC power distribution cabinet/AC distribution panel, multiple loads and controller, its feature
It is that the controller includes central controller, multiple current transformers, multiple micro source controllers and multiple load controllers, institute
State multiple distributed power sources to be respectively connected with AC power distribution cabinet/AC distribution panel by a current transformer and a micro source controller, the exchange is matched somebody with somebody
Electric cabinet is connected by bus with central controller, and the multiple load is respectively connected by a load controller with bus, central
Centre controller break down when, one of micro source controller can as standby master controller, wherein：
The current transformer, the AC or DC electricity for distributed power source to be exported is converted to three-phase alternating current, and according to micro- electricity
Source controller instruction, AC power distribution cabinet/AC distribution panel is transported to by the active power and reactive power of three-phase alternating current, while send three intersecting
Flow voltage, frequency and the power signal of electricity；
The micro source controller, for the instruction issued according to central controller, different control model instructions is sent extremely
Connected current transformer, the voltage sent to current transformer, frequency and power signal are adjusted；
Load operation conditions, for the instruction issued according to central controller, are controlled by the load controller；
The central controller, for when micro-capacitance sensor and bulk power grid are incorporated into the power networks, according to bulk power grid the need for, locally load need
The generating capacity of summation distributed power source, to active power and the reactive power operation point of each distributed power source and each load
Running status selected, and the operating point of selection and load operation conditions information are sent to corresponding micro source controller
And load controller；When micro-capacitance sensor is detected into island operation state, control model is adjusted, and to each micro source controller
Issue the instruction of switching control pattern.
2. a kind of microgrid control system, including multiple distributed power sources, AC power distribution cabinet/AC distribution panel, multiple loads and controller, its feature
It is that, also including protection circuit and the monitoring unit and wireless transport module that are connected with each other, the controller includes that center controls
Device, multiple current transformers, multiple micro source controllers and multiple load controllers, the multiple distributed power source is respectively by a change
Stream device and a micro source controller are connected with AC power distribution cabinet/AC distribution panel, and the protection circuit is connected to AC power distribution cabinet/AC distribution panel and center controls
On bus between device, the multiple load is respectively connected by a load controller with bus, the monitoring unit and wireless
Transport module is connected with AC power distribution cabinet/AC distribution panel, and when central controller breaks down, one of micro source controller can be used as standby
With master controller, wherein：
The current transformer, the AC or DC electricity for distributed power source to be exported is converted to three-phase alternating current, and according to micro- electricity
Source controller instruction, AC power distribution cabinet/AC distribution panel is transported to by the active power and reactive power of three-phase alternating current, while send three intersecting
Flow voltage, frequency and the power signal of electricity；
The micro source controller, for the instruction issued according to central controller, different control model instructions is sent extremely
Connected current transformer, the voltage sent to current transformer, frequency and power signal are adjusted；
Load operation conditions, for the instruction issued according to central controller, are controlled by the load controller；
The central controller, for when micro-capacitance sensor and bulk power grid are incorporated into the power networks, according to bulk power grid the need for, locally load need
The generating capacity of summation distributed power source, to active power and the reactive power operation point of each distributed power source and each load
Running status selected, and the operating point of selection and load operation conditions information are sent to corresponding micro source controller
And load controller；When micro-capacitance sensor is detected into island operation state, control model is adjusted, and to each micro source controller
Issue the instruction of switching control pattern；
The monitoring unit, carries out monitor in real time, and failure is believed for the working condition to AC power distribution cabinet/AC distribution panel and with electrical parameter
Breath is sent to Surveillance center；
The wireless transport module, the monitoring data for monitoring unit to be monitored is sent to Surveillance center；
The protection circuit, for when failure occurs, being protected to load in real time.
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| CN201710176630.8A CN106887840A (en) | 2017-03-23 | 2017-03-23 | A kind of microgrid control system |
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| CN201710176630.8A CN106887840A (en) | 2017-03-23 | 2017-03-23 | A kind of microgrid control system |
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| CN110390598A (en) * | 2019-09-05 | 2019-10-29 | 珠海格力电器股份有限公司 | Energy trading system, control method and storage medium |
| CN110752627A (en) * | 2019-10-29 | 2020-02-04 | 国网四川省电力公司经济技术研究院 | Microgrid autonomous cooperative control system considering energy complementation |
| CN111193283A (en) * | 2018-11-15 | 2020-05-22 | 蔡紫恒 | Automatically regulated switch based on intelligent operation control of little electric wire netting |
| CN113141057A (en) * | 2021-04-20 | 2021-07-20 | 北方民族大学 | Monitoring integrated device for microgrid and distributed control method |
| CN113189513A (en) * | 2021-04-29 | 2021-07-30 | 电子科技大学 | Ripple-based redundant power supply current sharing state identification method |
| CN114156939A (en) * | 2021-11-25 | 2022-03-08 | 珠海格力电器股份有限公司 | Micro-grid system and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111193283A (en) * | 2018-11-15 | 2020-05-22 | 蔡紫恒 | Automatically regulated switch based on intelligent operation control of little electric wire netting |
| CN110390598A (en) * | 2019-09-05 | 2019-10-29 | 珠海格力电器股份有限公司 | Energy trading system, control method and storage medium |
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| CN114156939A (en) * | 2021-11-25 | 2022-03-08 | 珠海格力电器股份有限公司 | Micro-grid system and control method thereof |
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Application publication date: 20170623 |