CN207304003U - A kind of micro-grid system based on DC energy source router - Google Patents

A kind of micro-grid system based on DC energy source router Download PDF

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Publication number
CN207304003U
CN207304003U CN201721143379.7U CN201721143379U CN207304003U CN 207304003 U CN207304003 U CN 207304003U CN 201721143379 U CN201721143379 U CN 201721143379U CN 207304003 U CN207304003 U CN 207304003U
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micro
energy source
module
circuit
router
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张航
吕新春
鲁纯
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Hunan shengtu Information Technology Co.,Ltd.
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Hunan Li'neng Science & Technology Co Ltd
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Abstract

The utility model discloses a kind of micro-grid system based on DC energy source router, including system monitor (i.e. energy management platform), DC energy 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;Multiple output ports of DC energy source router are 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.The micro-grid system based on DC energy source router is easy to implement, each road can be inputted and each road output energy realizes that dynamic and intelligent monitors.

Description

A kind of micro-grid system based on DC energy source router
Technical field
It the utility model is related to a kind of micro-grid system based on DC energy source router.
Background technology
Existing direct-current grid is made 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 that intermittent, randomness, and output voltage exists not Stablize, the problem of voltage level is inconsistent, each DC energy source cannot 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 voltages grade again Can, the micro battery output voltage and power are adjusted by each independent micro source controller.
Existing most close scheme is to refer to a kind of micro-capacitance sensor in the patent of Publication No. CN105932779A at present Energy router, it includes dc bus, generating equipment controllable switch group, grid-connected modular converter and electric control system etc.. Distributed-generation equipment, be directly connected with electric loading, power grid with router, and the router integrated level is high, can meet particular needs Ask, but at the same time there are input interface disunity, it is portable it is poor, be unfavorable for extending the problem of, it is difficult to adapt to micro-capacitance sensor and flexibly control The requirement of system.
Though the prior art can solve the problems, such as the access of a variety of distributed energies, there is control underaction at the same time, 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 micro-grid system based on DC energy source router.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of micro-grid system based on DC energy source router, The micro-grid system based on DC energy source router is easy to implement, and micro-grid system is transported under the unified monitoring of system monitor OK, security reliability is high.
The technical solution of utility model is as follows:
A kind of micro-grid system based on DC energy source router, including it is system monitor (i.e. energy management platform), straight Stream 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 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 further 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 plugged into case for storage battery.
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 Bus.
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 equipped with router group;
Main circuit includes input port, Buck conversion circuit (BUCK circuits) and output port;
The input port is used for the DC micro-electric source for connecting outside;
The 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 babinet, (if router group is one, to be placed in babinet, if multiple router groups, right It should be placed in respective independent babinet).
Each router unit further includes 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 detection circuit and second voltage detection circuit are 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.
In addition:
(I) 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 equipped with router group;
Main circuit includes input port, Buck conversion circuit (BUCK circuits) and output port;
The input port is used for the DC micro-electric source for connecting outside;
The 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, which controls all router units;
(2) when controller is n, n controllers are corresponding respectively to control n router unit.
Driver is 1 or n;
(1) when driver is 1, all router units of the driver control;
(2) when controller is n, n driver is corresponding respectively to drive n router unit.
Each router unit further includes 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 detection circuit and second voltage detection circuit are 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 exterior fieldbus, for obtaining control signal by fieldbus and uploading collection Data.Fieldbus is CAN bus 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.
The 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 is communicated to connect with communication controler;Communication controler is communicated to connect with relay protection and control device.
The communication controler is ARM controller;
ARM controller has the CAN interface for being used for connecting CAN bus.
The data acquisition controller is DSP.
Lightning protection device is equipped with router group.
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 Communicate 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 the control terminal of IGBT.
IGBT drive module uses M57959 devices.
(II) it is described as follows for DC energy source router unit (abbreviation router unit, similarly hereinafter):
The 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;
The input port is used for the DC micro-electric source for connecing outside in succession,;
The output port is used for the dc bus for connecing outside in succession;
The Buck conversion circuit includes blocking diode (D1), relay protection switch (EMI), channel switch (SSI), IGBT, fly-wheel diode (D2), inductance (L1) and capacitance (C1);Blocking diode, relay protection switch, channel switch And IGBT is serially connected between the anode of input port and the cathode of fly-wheel diode;Inductance be connected on the cathode of fly-wheel diode with it is defeated Between the anode of exit port;Capacitance 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 terminals 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.
The DC energy source router further includes 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 the control terminal of IGBT.
IGBT drive module uses M57959 devices.
The 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 is communicated to connect with communication controler;Communication controler is communicated to connect with relay protection and control device.
The communication controler is ARM controller;
ARM controller has the CAN interface for being used for connecting CAN bus.
The 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 Communicate 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.).
Lightning protection device is direct current arrester, also known as DC power supply arrester, is existing mature equipment;DC power supply arrester Device be used for prevent lightning surge and transient overvoltage from damage caused by DC power system and electrical equipment, protection equipment with The safety of user.
Direct current arrester, is additionally operable to eliminate the inductive lightning that distributed energy and storage battery seal in.
Bus-bar collocation device is connected by CAN bus with system monitor, for stable DC busbar voltage, eliminates line Ripple, suppresses 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 backup power supply 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 when electric network fault or disturbance cause the Voltage Drop of wind farm grid-connected point when, 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;Due to new energy such as solar energy and wind energies, there are certain seasonality, i.e. weather and season The change of section, it exports energy, and there are larger difference;Sometimes, output voltage is excessive to cause electrical equipment to be damaged Evil;Therefore, when DC bus-bar voltage is excessive, 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 be subject to system monitor, and system monitor first passes through real-time collection Data monitoring dc bus data so that decide whether start bus-bar collocation device, pass through CAN bus 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 micro-grid system based on DC energy source router of the utility model, its DC energy source router used, energy Realize that a variety of DC energy sources collect, using modular design, provide unified micro battery input interface, carry out output power and move State controls.The router is an autonomous device, can meet the different type micro battery input of 6 tunnels or more road at the same time, per all the way Input or output can carry out independent control, effectively control the distribution of micro-capacitance sensor trend, and scalability is high, portable good, be conducive to Build micro-grid system.
Direct current router is completed a variety of micro batteries and is 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 utility model uses unified distributed micro battery input interface, enhances portability, the autgmentability of system, The environmental suitability of raising system;
To sum up, the micro-grid system of the utility model, solves and provides modular distributed micro battery access, electricity The problem of distribution of power trend is difficult to control, using the component of high modularization, 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.
Embodiment
The utility model is described in further details below with reference to the drawings and specific embodiments:
Embodiment 1:Such as Fig. 1~3, the DC energy source router of the utility model includes 2 route casees and dc bus, institute State route case to be made of 3 independent routing channels, the different DC micro-electric source in 3 tunnels is can access, as shown in Fig. 2, DC energy source Route cabinet has accessed 6 kinds of different DC micro-electric sources.The routing channel circuit (i.e. router unit) as shown in Figure 1, including Main circuit, drive circuit, data acquisition controller, relay protection and control device and ARM controller (i.e. communication controler).The road Independent power circuit is further included by case.
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.
As shown in Figure 3:
6 road variety classes direct current distribution micro battery of the left side accesses direct current router by unified interface, by DC/DC Dc bus output is converged into after conversion, right side energy storage device includes storage battery and plugs into case, storage battery group, and energy storage device " is cut Peak load " acts on, and when distributed micro battery output power is insufficient, 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, improves 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, storage 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 bus and direct current road Plugged into and case, DC/DC, DC/AC converter and be connected by device, bus-bar collocation device, storage battery, be the control core of whole micro-grid system The heart.Storage 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 utility model is made of 2 independent route casees and dc bus, the route case Including 3 mutually independent routing channels, the different micro battery in 3 tunnels is can access, the routing channel is by main circuit, driving electricity Road, 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., forms 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, further includes 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 terminal of micro-grid system.
DC energy source router:Micro-capacitance sensor system central module, completes collecting and exchanging for DC energy source.
Energy management platform:The control core of system, is monitored whole micro-grid system 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 fluctuation and flickering.
Energy storage device:Plug into case, storage battery group etc. including storage 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, complete electric energy output.
Furthermore it is also possible to route case is extended to 3 by 2, or storage 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, is also considered as same scheme.

Claims (10)

1. a kind of micro-grid system based on DC energy source router, it is characterised in that including system monitor, DC energy source road By device, 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 it is more A 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.
2. the micro-grid system according to claim 1 based on DC energy source router, it is characterised in that further include with directly The bus-bar collocation device that stream busbar is connected, bus-bar collocation device are controlled by system monitor.
3. the micro-grid system according to claim 1 based on DC energy source router, it is characterised in that battery module Including multiple single batteries.
4. the micro-grid system according to claim 1 based on DC energy source router, it is characterised in that module of plugging into is Storage battery is plugged into case.
5. the micro-grid system according to claim 1 based on DC energy source router, it is characterised in that become flow module bag Include the DC/AC modules for connecing AC load and/or the DC/DC modules for connecing DC load.
6. the micro-grid system according to claim 1 based on DC energy source router, it is characterised in that DC energy source road It is connected by device, battery module and change flow module by bus with system monitor.
7. the micro-grid system according to claim 1 based on DC energy source router, 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 equipped with router group;
Main circuit includes input port, Buck conversion circuit (BUCK circuits) and output port;
The input port is used for the DC micro-electric source for connecting outside;
The 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.
8. the micro-grid system according to claim 7 based on DC energy source router, it is characterised in that the decompression Formula translation circuit includes blocking diode (D1), relay protection switch (EMI), channel switch (SSI), IGBT, fly-wheel diode (D2), inductance (L1) and capacitance (C1);Blocking diode, relay protection switch, channel switch and IGBT are serially connected in input port Anode and fly-wheel diode cathode between;Inductance is connected between the cathode of fly-wheel diode and the anode of output port;Electricity Hold in parallel with output port;The negative terminal of input port and the negative terminal of output port are connected with the anode of fly-wheel diode;
Drive circuit is connected with control module, and is controlled by control module;3 output terminals 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.
9. the micro-grid system according to claim 7 based on DC energy source router, it is characterised in that each route Device unit further includes the data acquisition circuit for gathering feedback voltage or current signal;Data acquisition circuit and control module phase Even;Data acquisition circuit includes first voltage detection circuit, second voltage detection circuit and current feedback circuit.
10. according to micro-grid system of the claim 1-9 any one of them based on DC energy source router, it is characterised in that First voltage detection circuit and second voltage detection circuit are respectively used to the voltage of detection input mouth and output port, and electric current is anti- Current feed circuit is 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 generating mould At least one of block, compressed air electricity generation module.
CN201721143379.7U 2017-09-07 2017-09-07 A kind of micro-grid system based on DC energy source router Active CN207304003U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110707761A (en) * 2019-10-25 2020-01-17 国网江苏省电力有限公司盐城供电分公司 Off-grid multi-microgrid system
CN111193384A (en) * 2020-01-22 2020-05-22 西安精石电气科技有限公司 Energy router and optical energy storage router system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110707761A (en) * 2019-10-25 2020-01-17 国网江苏省电力有限公司盐城供电分公司 Off-grid multi-microgrid system
CN111193384A (en) * 2020-01-22 2020-05-22 西安精石电气科技有限公司 Energy router and optical energy storage router system

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Effective date of registration: 20210118

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