CN107565543A - A kind of control method of DC energy source router and micro-grid system - Google Patents
A kind of control method of DC energy source router and micro-grid system Download PDFInfo
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- CN107565543A CN107565543A CN201710802120.7A CN201710802120A CN107565543A CN 107565543 A CN107565543 A CN 107565543A CN 201710802120 A CN201710802120 A CN 201710802120A CN 107565543 A CN107565543 A CN 107565543A
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
- Y04S10/123—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving renewable energy sources
Abstract
The invention discloses the control method of a kind of DC energy source router and micro-grid system, the control method of DC energy source router comprises the following steps：Step 1：Set monitoring parameter；Step 2：Whether within a preset range to detect DC energy source router input voltage；If then entering in next step, otherwise continue to detect DC energy source router input voltage；Step 3：Connect relay protection switch and channel switch；And PWM waveform output is controlled according to monitoring parameter, so as to control the output voltage of DC energy source router and electric current；Step 4：Whether inspection side output voltage, electric current exceed threshold value, if disconnecting relay protection switch and channel switch if, stop voltage and electric current output；And return to step 1.The control method of the DC energy source router and micro-grid system is easy to implement, and micro-grid system is run under the unified monitoring of system monitor, and security reliability is high.
Description
Technical field
The present invention relates to the control method of a kind of DC energy source router and micro-grid system.
Background technology
Existing direct-current grid is made up of DC micro-electric source, energy storage device, load etc., DC micro-electric source include wind-powered electricity generation,
Solar energy, the fuel cell distributed energy, type is more, and has the characteristics of intermittent, randomness, and output voltage is present not
Stably, the problem of voltage level is inconsistent, each DC energy source can not directly collect, and can not carry out unified allocation of resources to each DC energy source
Control.Solution universal at present is that each distributed energy carries out DC/DC conversion company by Technics of Power Electronic Conversion device voltage
Dc bus is connected to, dc bus provides electricity by Technics of Power Electronic Conversion device for the alternating current-direct current load of different voltage class again
Can, the micro battery output voltage and power are adjusted by each independent micro source controller.
Existing most close scheme is that a kind of micro-capacitance sensor is refer in Publication No. CN105932779A patent at present
Energy router, it includes dc bus, generating equipment gate-controlled switch group, grid-connected modular converter and electric control system etc..
Distributed-generation equipment, directly it is connected with router with electric loading, power network, the router integrated level is high, can meet particular needs
Ask, but input interface disunity, portable poor, the problem of being unfavorable for extending simultaneously be present, it is difficult to adapt to micro-capacitance sensor and flexibly control
The requirement of system.
Though prior art can solve the problems, such as the access of a variety of distributed energies, control underaction simultaneously be present, it is impossible to
Unified interface is provided, portability, scalability are poor, and progress dynamic control can not be distributed to the microgrid direction of energy and be asked
Topic.
Therefore, it is necessary to design a kind of control method of DC energy source router and micro-grid system.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of controlling party of DC energy source router and micro-grid system
The control method of method, the DC energy source router and micro-grid system is easy to implement, system of the micro-grid system in system monitor
One monitoring is lower to be run, and security reliability is high.
The technical solution of invention is as follows：
A kind of control method of DC energy source router, described DC energy source router include main circuit, drive circuit
And control circuit；
Main circuit includes input port, Buck conversion circuit (BUCK circuits) and output port；
Described input port is used for the DC micro-electric source for connecing outside in succession,；
Described output port is used for the dc bus for connecing outside in succession；
Described Buck conversion circuit includes blocking diode (D1), relay protection switch (EMI), channel switch
(SSI), IGBT, fly-wheel diode (D2), inductance (L1) and electric capacity (C1)；Blocking diode, relay protection switch, channel switch
And IGBT is serially connected between the anode of input port and the negative electrode of fly-wheel diode；Inductance be connected on the negative electrode of fly-wheel diode with it is defeated
Between the anode of exit port；Electric capacity is in parallel with output port；The negative terminal of input port and the negative terminal of output port with afterflow two
The anode of pole pipe is connected；
Drive circuit is connected with control module, and is controlled by control module；3 output ends of drive circuit succeed electricity respectively
The control terminal of protection switch, channel switch and IGBT；Drive module outputs level signals to relay protection switch and channel switch,
Control terminal (i.e. the G pole of IGBT) of the drive circuit output pwm signal to IGBT；
Blocking diode (D1), relay protection switch (EMI), channel switch (SSI), IGBT can be sequentially connected in series, and also may be used
Arbitrarily to connect, its electrical characteristic is not changed.
Described DC energy source router also includes being used for the data acquisition circuit for gathering feedback voltage or current signal；Number
It is connected according to Acquisition Circuit with control module；
Data acquisition circuit includes first voltage detection circuit, second voltage detection circuit and current feedback circuit；
First voltage detects circuit and second voltage detection circuit is respectively used to the electricity of detection input mouth and output port
Pressure, current feedback circuit are used for the output current of detection output mouth；
Control circuit receives external control instruction and main circuit is implemented to control.
Comprise the following steps：
Step 1：Set monitoring parameter；
Step 2：Whether within a preset range to detect DC energy source router input voltage；It is no if then entering in next step
Then continue to detect DC energy source router input voltage；
Step 3：Connect relay protection switch and channel switch；And PWM waveform output is controlled according to monitoring parameter, so as to control
The output voltage and electric current of DC energy source router processed；
Step 4：Whether inspection side output voltage, electric current exceed threshold value, disconnect relay protection switch if exceeding and passage is opened
Close, stop voltage and electric current output；And return to step 1.
Monitoring parameter in step 1 is from described external control instruction.
A kind of control method of micro-grid system, described micro-grid system includes system monitor, and (i.e. energy management is put down
Platform), DC energy source router, battery module and become flow module；
DC energy source router has multiple power input ports for being used to access DC micro-electric source；DC energy source router
Multiple output ports be connected with dc bus；
Battery module is connected by module of plugging into dc bus；
Become flow module with dc bus to be connected, become flow module and be used for into AC or DC load supplying；
DC energy source router, battery module and change flow module are connected with system monitor, and are controlled by system
Monitor；
Control method is：
Exported by the electric energy of system monitor control DC energy source router；Described mould of plugging into is passed through by system monitor
Whether block control battery module is connected with dc bus；Change flow module is controlled to power to the load by system monitor；Direct current energy
The data transfer of source router end collection is to system monitor.
Control for DC energy source router includes entering the all-router unit included in DC energy source router
Row control；
As follows to the control method of i-th of router unit, i=1,2,3 ... ..., N, N are to be wrapped in DC energy source router
The sum of the router unit contained；
Step 1：Set the monitoring parameter of i-th of router unit；
Step 2：Whether within a preset range to detect the input voltage of the router unit；It is no if then entering in next step
Then continue to detect the input voltage of the router unit；
Step 3：Connect the relay protection switch and channel switch of the router unit；And PWM is controlled according to monitoring parameter
Waveform exports, so as to control the output voltage of the router unit and electric current；
Step 4：Whether output voltage, the electric current of the inspection side router unit exceed threshold value, are protected if disconnecting relay if
Shield switch and channel switch, stop voltage and electric current output；And return to step 1.
DC energy source router is connected with system monitor by fieldbus；The monitoring parameter of step 1 is by system monitoring
Device is sent to DC energy source router by fieldbus.
DC energy source router is connected with MMI modules, and the monitoring parameter in step 1 is inputted by operator by MMI modules.
Micro-grid system also includes the bus-bar collocation device being connected with dc bus, and system monitor controls whether switching
(input or excision) bus-bar collocation device.
Becoming flow module includes being used for the DC/AC modules for connecing AC load and/or the DC/DC modules for connecing DC load.
DC energy source router includes at least one router group；Each router group includes n router unit；n
>=2, n are natural number；
Each router unit includes main circuit；Drive circuit and control circuit are provided with router group；
Main circuit includes input port, Buck conversion circuit (BUCK circuits) and output port；
Described input port is used for the DC micro-electric source for connecing outside in succession；
Described output port is used for the dc bus for connecing outside in succession；
Buck conversion circuit is driven by drive circuit, and Buck conversion circuit is controlled by control circuit.
In addition：
(I) it is described as follows for micro-grid system：
Micro-grid system include system monitor (i.e. energy management platform), DC energy source router, battery module and
Become flow module；
DC energy source router has multiple power input ports for being used to access DC micro-electric source；DC energy source router
Multiple output ports be connected with dc bus；
Battery module is connected by module of plugging into dc bus；
Become flow module with dc bus to be connected, become flow module and be used for into AC or DC load supplying；
DC energy source router, battery module and change flow module are connected with system monitor, and are controlled by system
Monitor.
Micro-grid system also includes the bus-bar collocation device being connected with dc bus, and bus-bar collocation device is controlled by system prison
Control device.
Battery module includes multiple single batteries.Multiple single batteries can carry out series and parallel combination.
Module of plugging into is that battery is plugged into case.Battery case of plugging into has and is used for communication module with system monitor, such as
CAN interface, there is control module, there is voltage, current sampling circuit, dc circuit breaker, fuse switch, contactor etc.
Received and instructed by communication module Deng, controller, and according to the instruction controlling switch device break-make of reception, realize that battery connects
Refute.
Becoming flow module includes being used for the DC/AC modules for connecing AC load and/or the DC/DC modules for connecing DC load.
DC energy source router, battery module and change flow module are connected by bus with system monitor.【It is preferred that
CAN】
DC energy source router includes at least one router group；Each router group includes n router unit；n
>=2, n are natural number；
Each router unit includes main circuit；Drive circuit and control circuit are provided with router group；
Main circuit includes input port, Buck conversion circuit (BUCK circuits) and output port；
Described input port is used for the DC micro-electric source for connecting outside；
Described output port is used for the dc bus for connecting outside；
Buck conversion circuit is driven by drive circuit, and Buck conversion circuit is controlled by control circuit.
Router group, which is placed in casing, (if router group is one, to be placed in casing, if multiple router groups, right
It should be placed in respective independent casing).
Each router unit also includes being used for the data acquisition circuit for gathering feedback voltage or current signal；Data are adopted
Collector is connected with control module.Data acquisition circuit includes first voltage detection circuit, second voltage detection circuit and electric current
Feedback circuit.
First voltage detects circuit and second voltage detection circuit is respectively used to the electricity of detection input mouth and output port
Pressure, current feedback circuit are used for the output current of detection output mouth.
DC micro-electric source is wind-powered electricity generation electricity generation module, solar electrical energy generation module, fuel cell, thermal power generation module, flywheel hair
At least one of electric module, compressed air electricity generation module.
(II) it is described as follows for DC energy source router：
DC energy source router, including at least one router group；Each router group includes n router unit；n
>=2, n are natural number；
Each router unit includes main circuit；Drive circuit and control circuit are provided with router group；
Main circuit includes input port, Buck conversion circuit (BUCK circuits) and output port；
Described input port is used for the DC micro-electric source for connecting outside；
Described output port is used for the dc bus for connecting outside；
Buck conversion circuit is driven by drive circuit, and Buck conversion circuit is controlled by control circuit.
Controller is 1 or n；n≥2；N is natural number；
(1) when controller is 1, the controller controls all router units；
(2) when controller is n, n controllers correspond to n router unit of control respectively.
Driver is 1 or n；
(1) when driver is 1, all router units of the driver control；
(2) when controller is n, n driver corresponds to n router unit of driving respectively.
Each router unit also includes being used for the data acquisition circuit for gathering feedback voltage or current signal；Data are adopted
Collector is connected with control module.Data acquisition circuit includes first voltage detection circuit, second voltage detection circuit and electric current
Feedback circuit；
First voltage detects circuit and second voltage detection circuit is respectively used to the electricity of detection input mouth and output port
Pressure, current feedback circuit are used for the output current of detection output mouth.
Controller is connected with the fieldbus of outside, for obtaining control signal by fieldbus and uploading collection
Data.Fieldbus is CAN or other buses.
DC micro-electric source is wind-powered electricity generation electricity generation module, solar electrical energy generation module, fuel cell, thermal power generation module, flywheel hair
At least one of electric module, compressed air electricity generation module.
Described control module includes data acquisition controller, relay protection and control device and communication controler；Data acquisition
Controller and relay protection and control device are connected with drive circuit；Data acquisition controller and relay protection and control device communication link
Connect；Data acquisition controller communicates to connect with communication controler；Communication controler communicates to connect with relay protection and control device.
Described communication controler is ARM controller；
ARM controller has the CAN interface for being used for connecting CAN.
Described data acquisition controller is DSP.
Lightning protection device is provided with router group.Lightning protection device is direct current arrester, also known as dc source arrester, is existing
Mature equipment；Dc source arrester device is used to prevent lightning surge and transient overvoltage from setting DC power system and electricity consumption
The safety of damage caused by standby, protection equipment and user.Direct current arrester, it is additionally operable to eliminate distributed energy and battery string
The induced lightening entered.
State monitoring module is additionally provided with output port (to be used for the output state for detecting the router, i.e., whether have voltage
Output etc.).
State monitoring module has to be connect for CAN interface, RS485 interfaces or the MODUSB buses of output status signal
Mouthful.Specifically, state monitoring module is communicated by RS485 interfaces or MODUSB buses with host computer, or pass through CAN interface
Communicated with external host.
In addition：Data acquisition controller be also associated with for locally control man-machine interface (such as keyboard, mouse, touch-screen,
Touch pad, display screen etc.).
Drive circuit is connected by IGBT drive module and IGBT control terminal.
IGBT drive module uses M57959 devices.
(III) it is described as follows for DC energy source router unit (abbreviation router unit, similarly hereinafter)：
Described DC energy source router unit includes main circuit, drive circuit and control circuit；
Main circuit includes input port, Buck conversion circuit (BUCK circuits) and output port；
Described input port is used for the DC micro-electric source for connecing outside in succession,；
Described output port is used for the dc bus for connecing outside in succession；
Described Buck conversion circuit includes blocking diode (D1), relay protection switch (EMI), channel switch
(SSI), IGBT, fly-wheel diode (D2), inductance (L1) and electric capacity (C1)；Blocking diode, relay protection switch, channel switch
And IGBT is serially connected between the anode of input port and the negative electrode of fly-wheel diode；Inductance be connected on the negative electrode of fly-wheel diode with it is defeated
Between the anode of exit port；Electric capacity is in parallel with output port；The negative terminal of input port and the negative terminal of output port with afterflow two
The anode of pole pipe is connected；
Drive circuit is connected with control module, and is controlled by control module；3 output ends of drive circuit succeed electricity respectively
The control terminal of protection switch, channel switch and IGBT；Drive module outputs level signals to relay protection switch and channel switch,
Control terminal (i.e. the G pole of IGBT) of the drive circuit output pwm signal to IGBT.
Blocking diode (D1), relay protection switch (EMI), channel switch (SSI), IGBT can be sequentially connected in series, and also may be used
Arbitrarily to connect, its electrical characteristic is not changed.
Described DC energy source router also includes being used for the data acquisition circuit for gathering feedback voltage or current signal；Number
It is connected according to Acquisition Circuit with control module.
Data acquisition circuit includes first voltage detection circuit, second voltage detection circuit and current feedback circuit；First
Voltage detecting circuit and second voltage detection circuit are respectively used to the voltage of detection input mouth and output port, current feedback electricity
Road is used for the output current of detection output mouth.
Drive circuit is connected by IGBT drive module and IGBT control terminal.
IGBT drive module uses M57959 devices.
Described control module includes data acquisition controller, relay protection and control device and communication controler；Data acquisition
Controller and relay protection and control device are connected with drive circuit；Data acquisition controller and relay protection and control device communication link
Connect；Data acquisition controller communicates to connect with communication controler；Communication controler communicates to connect with relay protection and control device.
Described communication controler is ARM controller；
ARM controller has the CAN interface for being used for connecting CAN.
Described data acquisition controller is DSP.
State monitoring module is additionally provided with output port (to be used for the output state for detecting the router, i.e., whether have voltage
Output etc.).
State monitoring module has to be connect for CAN interface, RS485 interfaces or the MODUSB buses of output status signal
Mouthful.Specifically, state monitoring module is communicated by RS485 interfaces or MODUSB buses with host computer, or pass through CAN interface
Communicated with external host.
In addition：Data acquisition controller be also associated with for locally control man-machine interface (such as keyboard, mouse, touch-screen,
Touch pad, display screen etc.).
Bus-bar collocation device is connected by CAN with system monitor, for stable DC busbar voltage, eliminates line
Ripple, suppress voltage flicker.It is described as follows：
Bus-bar collocation device includes being controlled by the standby energy-storage system (such as standby capacitor) that system monitor carries out switching
And discharge system；
(1) standby energy-storage system provides back-up source for dc bus, realizes low-voltage crossing when busbar voltage is too low
(low-voltage crossing refers to, when electric network fault or disturbance cause grid entry point Voltage Drop, the power supply of grid integration can continue to run with,
Such as whenPower networkFailure or disturbance causeWind power plantDuring the Voltage Drop of grid entry point, in the range of Voltage Drop, Wind turbines
Can uninterruptedly it be incorporated into the power networks.For photovoltaic plant when power system accident or disturbance cause photo-voltaic power generation station grid-connected voltage to be fallen
When, in certain Voltage Drop scope and time interval, photo-voltaic power generation station can ensure that off-grid is not run continuously.)
(2) effect of discharge system；Because certain seasonality, i.e. weather and season be present in the new energy such as solar energy and wind energy
The change of section, it exports energy and larger difference be present；Sometimes, output voltage is too high to cause electrical equipment to be damaged
Evil；Therefore, when DC bus-bar voltage is too high, certain electric energy is discharged by discharge system, so as to maintain DC bus-bar voltage to exist
In default scope；
Standby energy-storage system and discharge system are monitored by system monitor, and system monitor first passes through real-time collection
Data monitoring dc bus data, so as to decide whether start bus-bar collocation device, pass through CAN if it need to start
Bus-bar collocation device is issued instructions to, controls input and the excision of standby energy-storage system and discharge system.
Beneficial effect：
The DC energy source router of the present invention and the control method of micro-grid system are easy to implement.Direct current for micro-capacitance sensor
Energy source router, can realize that a variety of DC energy sources collect, and using modular design, provide unified micro battery input interface,
Carry out power output dynamic control.The router is an autonomous device, can meet the micro- electricity of 6 tunnels or more road different type simultaneously
Source inputs, and can carry out independent control per inputting or exporting all the way, effectively control the distribution of micro-capacitance sensor trend, scalability is high, removable
Plant property is good, is advantageous to build micro-grid system.
Direct current router is completed a variety of micro batteries and collected in the system, can dynamic regulation output port power output, be
The hinge of the energy, and the hinge of information.Energy management platform by fieldbus to micro battery, energy storage device, compensation device,
Load electric converter carries out unified management and allotment, can ensure that whole micro-grid system is reliable, stable operation.
The present invention uses unified distributed micro battery input interface, enhances portability, the autgmentability of system, improves
The environmental suitability of system；
Sum it up, the control method of the present invention, solves and provides modular distributed micro battery access, the direction of energy
The problem of distribution is difficult to control, using the component of high modularization, is easy to extend, enhances the adaptability of micro-capacitance sensor.
Brief description of the drawings
Fig. 1 is the circuit diagram of DC energy source router unit.
Fig. 2 is the structure chart of DC energy source router.
Fig. 3 is the topological diagram that DC energy source router is used for micro-capacitance sensor.
Fig. 4 is the action flow chart of DC energy source router.
Embodiment
The present invention is described in further details below with reference to the drawings and specific embodiments：
Embodiment 1：Such as Fig. 1~4, DC energy source router of the invention includes 2 route casees and dc bus, the road
It is made up of case 3 independent routing channels, can access the different DC micro-electric source in 3 tunnels, as shown in Fig. 2 DC energy source is route
Cabinet has accessed 6 kinds of different DC micro-electric sources.The routing channel circuit (i.e. router unit) is as shown in figure 1, including main electricity
Road, drive circuit, data acquisition controller, relay protection and control device and ARM controller (i.e. communication controler).The route case
Also include independent power circuit.
The voltage transmitter HPT of data acquisition controller and main circuit (i.e. first voltage detection circuit and second voltage inspection
Slowdown monitoring circuit), current transducer HCT (i.e. current feedback circuit) connections, the data acquisition controller also with drive circuit, relay
Protect controller, ARM controller (i.e. communication controler) connection.
The relay protection switch EM1 of drive circuit and main circuit, channel switch SS1, IGBT drive module M57959 connections,
The drive circuit is also connected with data acquisition controller, relay protection and control device.
Relay protection and control device is connected with controller, drive circuit, ARM controller.
ARM controller is connected with data acquisition controller, relay protection and control device.
It is as shown in Figure 4 that DC energy source collects flow chart.
1st, the voltage and current parameter of DC micro-electric source input and output is gathered.
2nd, whether inspection system and voltage and current parameter are normal, normally then connect relay protection switch, channel switch, otherwise
Again it is loaded into parameter testing.
3rd, relay protection switch and channel switch are connected.
4th, according to local voltage and current parameter and long-range given parameters control PWM waveform output, so as to adjust output voltage,
Electric current.Specific regulation process is existing mature technology.
5th, check whether output voltage, electric current exceed threshold value, without departing from electric energy output is then produced, protected beyond relay is then disconnected
Shield switch, channel switch, set system monitor, wait local reset signal or remote reset signal, stop output.
As shown in Figure 3：
The road variety classes direct current distribution micro battery of the left side 6 accesses direct current router by unified interface, by DC/DC
Dc bus output is converged into after conversion, right side energy storage device includes battery and plugged into case, batteries, and energy storage device " is cut
Peak load " acts on, and when distributed micro battery power output deficiency, is supplemented by energy storage device, effectively prevents voltage from caving in, micro-
An important supporting role is played in network system.Dc bus compensation device can prevent overvoltage and voltage sag, suppress line
Ripple, improve DC bus-bar voltage stability and the reliability of whole micro-grid system.
Direct current router is connected with micro battery and dc bus.Bus-bar collocation device, battery are plugged into case, DC/DC, DC/
AC converters are connected with dc bus, and dc bus completes the exchange of the energy.Energy management platform passes through CAN and direct current road
Plugged into and case, DC/DC, DC/AC converter and be connected by device, bus-bar collocation device, battery, be the control core of whole micro-grid system
The heart.Battery case of plugging into is two-way DC/DC converting means, can both store energy, or micro-capacitance sensor provides energy, keeps system
Voltage stabilization.
The DC energy source router of the present invention is made up of 2 independent route casees and dc bus, and the route case includes 3
Individual separate routing channel, the different micro battery in 3 tunnels is can access, the routing channel is by main circuit, drive circuit, data
Acquisition controller, ARM controller composition.
Main circuit：For accessing distributed micro battery, blocking diode D1, relay protection switch EM1, channel switch are included
SS1, PWM adjusting switch etc., form a decompression BUCK type circuit.
Drive circuit：Driven with controller, relay protection and control device, relay protection switch EM1, channel switch SS1, IGBT
Module M57959 is connected, for receiving the signal of controller and relay protection and control device, control relay protection switch, channel switch
Connecting and disconnecting, adjust output voltage electric current.
Controller：It is connected with drive circuit, relay protection and control device, data acquisition controller, for collection voltages, electric current
Feedback signal, and the long-range Setting signal passed over according to the ARM controller carries out computing, forms control signal, works as control
Device processed is under communication loss situation, practicable local control, the reliable and stable operation of safeguards system.
ARM controller：It is connected with relay protection and control device and controller, for receiving remote signal and the local number of transmission
According to.
Micro-grid system based on energy source router includes photovoltaic, wind-force, fuel cell, heating power, flywheel, compressed air etc.
Direct current distribution micro battery, in addition to direct current router, energy management platform, bus-bar collocation device, energy storage device, energy conversion
Device.
DC micro-electric source：The direct current distributed energy such as photovoltaic, wind-force, the input of micro-grid system.
DC energy source router：Micro-capacitance sensor system central module, complete collecting and exchanging for DC energy source.
Energy management platform：The control core of system, whole micro-grid system is monitored by local controlling bus,
Dynamic control micro battery exports and the distribution of the micro-capacitance sensor direction of energy.
Bus-bar collocation device：Clamper is carried out to output voltage, suppresses voltage pulsation and flickering.
Energy storage device：Plugged into case, batteries etc. including battery, for micro-grid system energy stores and output voltage
Support, plays a part of " peak load shifting ".
Energy converter：Including DC/AC, DC/DC converters, for matched load, electric energy output is completed.
Furthermore it is also possible to route case is extended to 3 by 2, or battery plugged into case, dc bus compensation dress
Put, energy management platform, DC/DC converters, DC/AC converters are independent or some or all of are integrated to DC energy source route
Device, it is also considered as same scheme.
Claims (10)
- A kind of 1. control method of DC energy source router, it is characterised in that described DC energy source router include main circuit, Drive circuit and control circuit；Main circuit includes input port, Buck conversion circuit (BUCK circuits) and output port；Described input port is used for the DC micro-electric source for connecing outside in succession,；Described output port is used for the dc bus for connecing outside in succession；Described Buck conversion circuit include blocking diode (D1), relay protection switch (EMI), channel switch (SSI), IGBT, fly-wheel diode (D2), inductance (L1) and electric capacity (C1)；Blocking diode, relay protection switch, channel switch and IGBT It is serially connected between the anode of input port and the negative electrode of fly-wheel diode；Inductance is connected on the negative electrode and output port of fly-wheel diode Anode between；Electric capacity is in parallel with output port；The negative terminal of input port and the negative terminal of output port with fly-wheel diode Anode is connected；Drive circuit is connected with control module, and is controlled by control module；3 output ends of drive circuit succeed electric protection respectively The control terminal of switch, channel switch and IGBT；Drive module outputs level signals drive to relay protection switch and channel switch Control terminal of the circuit output pwm signal to IGBT；Described DC energy source router also includes being used for the data acquisition circuit for gathering feedback voltage or current signal；Data are adopted Collector is connected with control module；Data acquisition circuit includes first voltage detection circuit, second voltage detection circuit and current feedback circuit；First voltage detects circuit and second voltage detection circuit is respectively used to the voltage of detection input mouth and output port, electricity Current feedback circuit is used for the output current of detection output mouth；Control circuit receives external control instruction and main circuit is implemented to control.
- 2. the control method of DC energy source router according to claim 1, it is characterised in that comprise the following steps：Step 1：Set monitoring parameter；Step 2：Whether within a preset range to detect DC energy source router input voltage；If then enter in next step, otherwise after Continuous detection DC energy source router input voltage；Step 3：Connect relay protection switch and channel switch；And PWM waveform output is controlled according to monitoring parameter, it is straight so as to control The output voltage and electric current of stream energy source router；Step 4：Whether inspection side output voltage, electric current exceed threshold value, if disconnecting relay protection switch and channel switch if, stop Only voltage and electric current output；And return to step 1.
- 3. the control method of DC energy source router according to claim 2, it is characterised in that the monitoring ginseng in step 1 Number is from described external control instruction.
- 4. a kind of control method of micro-grid system, it is characterised in that described micro-grid system includes system monitor, direct current Can source router, battery module and change flow module；DC energy source router has multiple power input ports for being used to access DC micro-electric source；DC energy source router it is more Individual output port is connected with dc bus；Battery module is connected by module of plugging into dc bus；Become flow module with dc bus to be connected, become flow module and be used for into AC or DC load supplying；DC energy source router, battery module and change flow module are connected with system monitor, and are controlled by system monitoring Device；Control method is：Exported by the electric energy of system monitor control DC energy source router；Described module control of plugging into is passed through by system monitor Whether battery module processed is connected with dc bus；Change flow module is controlled to power to the load by system monitor；DC energy source road By the data transfer that device end gathers to system monitor.
- 5. the control method of micro-grid system according to claim 4, it is characterised in that for DC energy source router Control includes being controlled the all-router unit included in DC energy source router；As follows to the control method of i-th of router unit, i=1,2,3 ... ..., N, N are what is included in DC energy source router The sum of router unit；Step 1：Set the monitoring parameter of i-th of router unit；Step 2：Whether within a preset range to detect the input voltage of the router unit；If then enter in next step, otherwise after The continuous input voltage for detecting the router unit；Step 3：Connect the relay protection switch and channel switch of the router unit；And PWM waveform is controlled according to monitoring parameter Output, so as to control the output voltage of the router unit and electric current；Step 4：Whether output voltage, the electric current of the inspection side router unit exceed threshold value, are opened if disconnecting relay protection if Close and channel switch, stopping voltage and electric current export；And return to step 1.
- 6. the control method of micro-grid system according to claim 5, it is characterised in that DC energy source router and system Monitor is connected by fieldbus；The monitoring parameter of step 1 is sent to DC energy source by system monitor by fieldbus Router.
- 7. the control method of micro-grid system according to claim 5, it is characterised in that DC energy source router is connected with MMI modules, the monitoring parameter in step 1 are inputted by operator by MMI modules.
- 8. the control method of micro-grid system according to claim 4, it is characterised in that micro-grid system also include with it is straight The connected bus-bar collocation device of bus is flowed, system monitor controls whether switching (input or excision) bus-bar collocation device.
- 9. the control method of micro-grid system according to claim 4, it is characterised in that becoming flow module includes being used to connect friendship The DC/AC modules of current load and/or the DC/DC modules for connecing DC load.
- 10. the control method of the micro-grid system according to claim any one of 4-9, it is characterised in that DC energy source road At least one router group is included by device；Each router group includes n router unit；N >=2, n are natural number；Each router unit includes main circuit；Drive circuit and control circuit are provided with router group；Main circuit includes input port, Buck conversion circuit (BUCK circuits) and output port；Described input port is used for the DC micro-electric source for connecing outside in succession；Described output port is used for the dc bus for connecing outside in succession；Buck conversion circuit is driven by drive circuit, and Buck conversion circuit is controlled by control circuit.
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| CN201710802120.7A CN107565543A (en) | 2017-09-07 | 2017-09-07 | A kind of control method of DC energy source router and micro-grid system |
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| CN201710802120.7A CN107565543A (en) | 2017-09-07 | 2017-09-07 | A kind of control method of DC energy source router and micro-grid system |
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Cited By (1)
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| CN109149934A (en) * | 2018-09-05 | 2019-01-04 | 国充充电科技江苏股份有限公司 | A kind of DC grid buck charging pile system |
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