CN105634028B - The control method and system of a kind of alternating current-direct current mixing micro-capacitance sensor - Google Patents
The control method and system of a kind of alternating current-direct current mixing micro-capacitance sensor Download PDFInfo
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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
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Abstract
The invention discloses the control method and system of a kind of alternating current-direct current mixing micro-capacitance sensor, this method includes receiving the first instruction for switching to preset running mode from present mode of operation；According to the first instruction calls and the first corresponding handover mechanism of instruction；Present mode of operation is switched to preset running mode according to handover mechanism.The present invention is suitable for the capacity of DC side basic generation unit less than the alternating current-direct current mixing micro-capacitance sensor of the capacity of exchange side basic generation unit, can realize taking over seamlessly for each operational mode, improve the security performance of alternating current-direct current mixing micro-capacitance sensor.
Description
Technical field
The present invention relates to alternating current-direct current micro-capacitance sensor control technology field, more particularly to a kind of controlling party of alternating current-direct current micro-capacitance sensor
Method and system.
Background technology
As the informationization of social development is with intelligent, direct-flow electricity utilization apparatus are increasing, formd alternating current equipment
The situation largely coexisted with DC equipment is required to multiple alternating current-direct current in simple exchange micro-capacitance sensor or direct-current grid and becomes
Bring the access demand for meeting distributed generation resource and load.In order to reduce the power damage brought by multiple AC/DC or DC/AC conversion
Consumption, harmonic current and control difficulty improve the reliability and economy of system, also for miscellaneous regenerative resource and storage
Energy equipment preferably accesses micro-capacitance sensor, and alternating current-direct current mixing micro-capacitance sensor is come into being.In general, alternating current-direct current mixing micro-capacitance sensor is in DC side
Including DC side energy storage device, DC side energy storage transverter and distributed photovoltaic, wherein, DC side energy storage device is DC side master
Generating equipment；Include exchange side energy storage device (exchange side energy storage transverter) and/or diesel-driven generator, wind-power electricity generation in exchange side
Machine and distributed photovoltaic, wherein, exchange side energy storage device and diesel-driven generator are basic generation unit；In exchange side and DC side
Between further include main transverter.
Main transverter and DC side energy storage unsteady flow in the correlative study of alternating current-direct current mixing micro-capacitance sensor, being proposed both at home and abroad
The method of operation and control algolithm of device are set suitable for DC side configuration large capacity energy storage device, exchange side configuration low capacity energy storage
It standby application scenarios namely needs, in the larger energy storage device of DC side configuration capacity, to take up entirely in off-network
Alternating current-direct current mixing micro-capacitance sensor；It is typically that DC side builds low capacity but in the practical application of current alternating current-direct current mixing micro-capacitance sensor
Distributed photovoltaic, and the distributed energy storage equipment of general configuration low capacity, exchange side are often configured with large capacity energy storage device, because
This, the method for operation and control algolithm of main transverter and DC side energy accumulation current converter of the prior art also can not just answer well
It uses among actual scene.
Therefore, how a kind of DC side that is suitable for is provided and configures low capacity energy storage device, exchange side configuration large capacity energy storage
Application scenarios control method and system be the current problem to be solved of those skilled in the art.
The content of the invention
The object of the present invention is to provide a kind of control methods of alternating current-direct current mixing micro-capacitance sensor, are set suitable for the main power generation of DC side
Standby capacity is less than the alternating current-direct current mixing micro-capacitance sensor of the capacity of exchange side basic generation unit, can realize the flat of each operational mode
Sliding cutting changes, and improves the security performance of alternating current-direct current mixing micro-capacitance sensor；It is a further object of the present invention to provide a kind of mixing of alternating current-direct current
The control system of micro-capacitance sensor.
In order to solve the above technical problems, the present invention provides a kind of control method of alternating current-direct current mixing micro-capacitance sensor, the friendships
In direct current mixing micro-capacitance sensor, the capacity of DC side basic generation unit is less than the capacity of exchange side basic generation unit, wherein, it is described straight
Flow side basic generation unit include DC side energy-storage battery, the exchange side basic generation unit include exchange side energy-storage battery and/or
Diesel-driven generator, this method include：
Receive the first instruction for switching to preset running mode from present mode of operation；
According to first instruction calls and the described first corresponding handover mechanism of instruction；
Present mode of operation is switched to the preset running mode according to the handover mechanism.
Preferably, when the described first instruction is specially that each off-grid operation switchs to the instruction of joint off-grid operation from alternating current-direct current
Or from when exchanging grid-connected direct current off-network and switching to combine grid-connected instruction, then present mode of operation is cut according to the handover mechanism
The process for being changed to the preset running mode is specially：
Alternating current-direct current micro electric network coordination controller generates the grid-connected instruction of direct current；
DC micro-electric net controller controls the DC side of main transverter to switch and closes after the grid-connected instruction of direct current is obtained
It closes, and issues DC constant voltage to DC side energy storage transverter and turn the sagging operating instruction of DC voltage；
The alternating current-direct current micro electric network coordination controller issues DC side constant pressure enabled instruction to the main transverter so that institute
State main converter Control DC bus-bar voltage constant pressure；
The DC micro-electric net controller issues the sagging invariable power that turns of DC voltage to the DC side energy storage transverter and transports
Row instruction.
Preferably, when the described first instruction is specially to switch to the instruction of the respective off-grid operation of alternating current-direct current from joint off-grid operation
When, then the process that present mode of operation is switched to the preset running mode according to the handover mechanism is specially：
Alternating current-direct current micro electric network coordination controller is generated according to the performance number of the main transverter of control DC bus-bar voltage constant pressure
Adjust the second instruction of the exchange power of main transverter；
DC micro-electric net controller is fair to switching by the exchange power adjustment of the main transverter according to the described second instruction
Perhaps exchange in power bracket；
The DC micro-electric net controller is issued to DC side energy storage transverter to be switched to by output-constant operation under DC voltage
Hang down operating instruction；
The alternating current-direct current micro electric network coordination controller control main transverter is shut down；
The DC micro-electric net controller controls the DC side switch of the main transverter to disconnect；
The DC micro-electric net controller is issued to the DC side energy storage transverter turns constant pressure fortune by DC voltage is sagging
Row instruction.
Preferably, when the exchange side basic generation unit includes exchange side energy-storage battery and diesel-driven generator and described first
Instruction be specially from combine be incorporated into the power networks the instruction for switching to joint off-grid operation when, then will currently be run according to the handover mechanism
Pattern switching is that the process of the preset running mode is specially：
Power to the switching that alternating current-direct current micro electric network coordination controller adjusts grid entry point allows in power bracket；
The alternating current-direct current micro electric network coordination controller according to the performance number of main transverter, the performance number of the grid entry point and
The state-of-charge generation of the exchange side energy-storage battery establishes exchange using the exchange side energy storage transverter or diesel-driven generator
3rd instruction of busbar voltage；
Exchange micro-capacitance sensor controller according to the described 3rd instruction correspondingly control the exchange side energy storage transverter or
The diesel-driven generator is to the sagging method of operation；
The exchange micro-capacitance sensor controller controls the switch of the grid entry point to disconnect；
The exchange micro-capacitance sensor controller correspondingly controls the exchange side energy storage transverter according to the described 3rd instruction
Or the diesel-driven generator switchs to constant voltage constant frequency operational mode by sagging operational mode.
Preferably, when the exchange side basic generation unit includes exchange side energy-storage battery and diesel-driven generator and described first
Instruction is specially that off-grid operation switchs to combine the instruction being incorporated into the power networks or each off-network switchs to exchange simultaneously from alternating current-direct current from combining
During the off-grid instruction of net direct current, then present mode of operation is switched to the mistake of the preset running mode according to the handover mechanism
Journey is specifically：
The generation of alternating current-direct current micro electric network coordination controller exchanges grid-connected instruction；
Micro-capacitance sensor controller is exchanged after the grid-connected instruction of exchange is obtained, controls exchange side energy storage transverter or described
Diesel-driven generator issues constant voltage constant frequency and turns sagging operating instruction；
The exchange micro-capacitance sensor controller when the voltage amplitude value difference of the switch both sides of grid entry point meet the first preset condition and
When the phase difference of the switch both sides of the grid entry point meets the second preset condition, the switch of the grid entry point is controlled to be closed；
The exchange micro-capacitance sensor controller issues sagging operation to the exchange side energy storage transverter and turns output-constant operation and refer to
Order, while issue diesel-driven generator halt instruction.
In order to solve the above technical problems, the present invention also provides a kind of control system of alternating current-direct current mixing micro-capacitance sensor, it is described
In alternating current-direct current mixing micro-capacitance sensor, the capacity of DC side basic generation unit is less than the capacity of exchange side basic generation unit, wherein, it is described
DC side basic generation unit include DC side energy-storage battery, the exchange side basic generation unit include exchange side energy-storage battery and/
Or diesel-driven generator, the system include instruction reception unit and perform system, Energy Management System include command reception system and
Calling system, wherein：
Described instruction reception system, for receiving the first instruction for switching to preset running mode from present mode of operation；
The calling system, for according to first instruction calls and the described first corresponding handover mechanism of instruction；
Execution system, for present mode of operation to be switched to the preset running mode according to the handover mechanism.
Preferably, when the described first instruction is specially that each off-grid operation switchs to the instruction of joint off-grid operation from alternating current-direct current
Or from when exchanging grid-connected direct current off-network and switching to combine grid-connected instruction, then the execution system specifically includes alternating current-direct current micro-capacitance sensor
Tuning controller and DC micro-electric net controller, wherein：
The alternating current-direct current micro electric network coordination controller, for generating the grid-connected instruction of direct current；DC side is issued to main transverter
Constant pressure enabled instruction so that the main converter Control DC bus-bar voltage constant pressure；
The DC micro-electric net controller, for after the grid-connected instruction of direct current is obtained, controlling the main transverter
DC side switch is closed, and is issued DC constant voltage to DC side energy storage transverter and turned the sagging operating instruction of DC voltage；To described
DC side energy storage transverter issues the sagging output-constant operation that turns of DC voltage and instructs.
Preferably, when the described first instruction is specially to switch to the instruction of the respective off-grid operation of alternating current-direct current from joint off-grid operation
When, then the execution system specifically includes alternating current-direct current micro electric network coordination controller and DC micro-electric net controller, wherein：
The alternating current-direct current micro electric network coordination controller, for the work(of the main transverter according to control DC bus-bar voltage constant pressure
The generation of rate value adjusts the second instruction of the exchange power of main transverter；The main transverter is controlled to shut down；
The DC micro-electric net controller, for being instructed according to described second by the exchange power adjustment of the main transverter
Allow to exchange in power bracket to switching；It is issued to DC side energy storage transverter and the sagging fortune of DC voltage is switched to by output-constant operation
Row instruction；The DC side of the main transverter is controlled to switch to disconnect；It is issued to the DC side energy storage transverter by DC voltage
It is sagging to turn constant-pressure operation instruction.
Preferably, when the exchange side basic generation unit includes exchange side energy-storage battery and diesel-driven generator and described first
Instruction be specially from combine be incorporated into the power networks the instruction for switching to joint off-grid operation when, then the execution system specifically includes alternating current-direct current
Micro electric network coordination controller with exchange micro-capacitance sensor controller, wherein：
The alternating current-direct current micro-capacitance sensor controller, power to the switching for adjusting grid entry point allow in power bracket；According to
The state-of-charge generation of the performance number of main transverter, the performance number of the grid entry point and the exchange side energy-storage battery is using institute
It states exchange side energy storage transverter or diesel-driven generator establishes the 3rd instruction of ac bus voltage；
The exchange micro-capacitance sensor controller, for according to the described 3rd instruction the exchange side energy storage correspondingly being controlled to change
Device or the diesel-driven generator are flowed to the sagging method of operation；The switch of the grid entry point is controlled to disconnect；Refer to according to the described 3rd
Order correspondingly controls the exchange side energy storage transverter or the diesel-driven generator to switch to constant pressure and constant by sagging operational mode
Frequency operational mode.
Preferably, when the exchange side basic generation unit includes exchange side energy-storage battery and diesel-driven generator and described first
Instruction is specially that off-grid operation switchs to combine the instruction being incorporated into the power networks or each off-network switchs to exchange simultaneously from alternating current-direct current from combining
During the off-grid instruction of net direct current, then the execution system specifically includes alternating current-direct current micro electric network coordination controller and exchanges micro-capacitance sensor control
Device processed, wherein：
The alternating current-direct current micro electric network coordination controller exchanges grid-connected instruction for generating；
The exchange micro-capacitance sensor controller, for after the grid-connected instruction of exchange is obtained, controlling the exchange side energy storage change of current
Device or the diesel-driven generator issue constant voltage constant frequency and turn sagging operating instruction；When the voltage amplitude value difference of the switch both sides of grid entry point
When meeting phase difference the second preset condition of satisfaction of the switch both sides of the first preset condition and the grid entry point, control is described grid-connected
The switch of point is closed；Sagging operation is issued to the exchange side energy storage transverter and turns output-constant operation instruction, while issues diesel oil
Generator outage instructs.
The present invention provides the control method and system of a kind of alternating current-direct current mixing micro-capacitance sensor, this method includes receiving from current
Operational mode switchs to the first instruction of preset running mode；According to the first instruction calls and the first corresponding switching machine of instruction
System；Present mode of operation is switched to preset running mode according to handover mechanism.The present invention is suitable for DC side basic generation unit
Capacity be less than exchange side basic generation unit capacity alternating current-direct current mixing micro-capacitance sensor, can realize the smooth of each operational mode
Switching improves the security performance of alternating current-direct current mixing micro-capacitance sensor.
Description of the drawings
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the topology and control system figure of a kind of alternating current-direct current mixing micro-capacitance sensor provided by the invention；
Fig. 2 is a kind of process flow diagram flow chart of the control method of alternating current-direct current mixing micro-capacitance sensor provided by the invention；
For a kind of alternating current-direct current mixing micro-capacitance sensor provided by the invention, from alternating current-direct current, each off-grid operation switchs to joint off-network to Fig. 3
Operation switchs to the process flow diagram flow chart for combining grid-connected control method from grid-connected direct current off-network is exchanged；
Fig. 4 switchs to alternating current-direct current each off-network for a kind of alternating current-direct current mixing micro-capacitance sensor provided by the invention from joint off-grid operation
The process flow diagram flow chart of the control method of operation；
Fig. 5 switchs to joint off-grid operation from combining to be incorporated into the power networks for a kind of alternating current-direct current mixing micro-capacitance sensor provided by the invention
The process flow diagram flow chart of control method；
For a kind of alternating current-direct current mixing micro-capacitance sensor provided by the invention, from alternating current-direct current, each off-grid operation switchs to joint off-network to Fig. 6
Operation switchs to the process flow diagram flow chart for combining grid-connected control method from grid-connected direct current off-network is exchanged；
Fig. 7 is a kind of structure diagram of the control system of alternating current-direct current mixing micro-capacitance sensor provided by the invention.
Specific embodiment
The core of the present invention is to provide a kind of control method of alternating current-direct current mixing micro-capacitance sensor, is set suitable for the main power generation of DC side
Standby capacity is less than the alternating current-direct current mixing micro-capacitance sensor of the capacity of exchange side basic generation unit, can realize the flat of each operational mode
Sliding cutting changes, and improves the security performance of alternating current-direct current mixing micro-capacitance sensor；Another core of the present invention is to provide a kind of alternating current-direct current mixing
The control system of micro-capacitance sensor.
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
All other embodiments obtained without making creative work belong to the scope of protection of the invention.
Referring to Fig.1 and 2, wherein, Fig. 1 is topology and the control of a kind of alternating current-direct current mixing micro-capacitance sensor provided by the invention
System diagram, Fig. 2 are a kind of process flow diagram flow chart of the control method of alternating current-direct current mixing micro-capacitance sensor provided by the invention.
In the alternating current-direct current mixing micro-capacitance sensor that the application mentions, the capacity of DC side basic generation unit is less than the main power generation of exchange side
The capacity of equipment, wherein, DC side basic generation unit includes DC side energy-storage battery, and exchange side basic generation unit includes exchange side
Energy-storage battery and/or diesel-driven generator, this method include：
Step S101：Receive the first instruction for switching to preset running mode from present mode of operation；
It is understood that the first instruction that alternating current-direct current mixing micro-capacitance sensor operations staff sends is received first.
Step S102：According to the first instruction calls and the first corresponding handover mechanism of instruction；
Step S103：Present mode of operation is switched to preset running mode according to handover mechanism.
It is understood that the alternating current-direct current mixing micro-capacitance sensor that the application provides supports that alternating current-direct current joint is grid-connected, exchange is grid-connected
Direct current off-network, alternating current-direct current joint off-network, alternating current-direct current each these four operating statuses of off-network, and can realize the smooth of operational mode
Switching.
In addition, for convenience of the introduction of the following control method provided the application, the control of the application offer is described below
A kind of state of the specific alternating current-direct current mixing micro-capacitance sensor that method is applicable under four kinds of common operational modes, alternating current-direct current mix micro- electricity
The control system of net includes main transverter (AC/DC in corresponding diagram 1 between K2 and K3), exchange side energy storage transverter (corresponding diagram 1
The DC/AC of middle exchange side), DC side energy storage transverter (DC/DC of DC side in corresponding diagram 1), exchange side micro-capacitance sensor controller,
DC side micro-capacitance sensor controller, alternating current-direct current mixing micro-capacitance sensor tuning controller and Energy Management System.The alternating current-direct current mixes micro- electricity
Net further includes：Exchange side wind-driven generator and exchange side photovoltaic, DC side photovoltaic.Energy Management System is controlled with direct-current grid
It is connected between device, exchange micro-capacitance sensor controller, alternating current-direct current micro electric network coordination controller by following the network of IEC 61850/MMS,
Main transverter, DC side energy storage transverter, exchange side energy storage transverter, DC micro-electric net controller, exchange micro-capacitance sensor controller,
It is connected between alternating current-direct current micro electric network coordination controller by following the network of IEC 61850/GOOSE.Specifically, it refer to Fig. 1.
When alternating current-direct current combines and is incorporated into the power networks, main converter Control DC bus-bar voltage, exchange side energy storage transverter can root
It is nursed one's health according to the state-of-charge (State of Charge, SOC) of DC side energy-storage battery, DC side energy storage transverter can root
It is nursed one's health according to the state-of-charge (SOC) of exchange side energy-storage battery.Meanwhile to realize that economic optimization is run, at diesel-driven generator
In hot standby or shutdown, exchange side photovoltaic, DC side photovoltaic and wind-driven generator are then according to MPPT maximum power point tracking (Maximum
Power Point Tracking, MPPT) it generates electricity, realize the purpose for maximally utilizing clean energy resource.
It is understood that in the prior art, generally use DC side energy storage transverter controls DC bus-bar voltage, but
In the application, because the capacity of the capacity of DC side energy-storage battery and DC side energy storage transverter is small, control direct current is not enough to
Therefore busbar voltage, DC bus-bar voltage is controlled using main transverter, directly controlled by alternating current-direct current micro electric network coordination controller
System, control method are simple.
When exchanging grid-connected direct current off-grid operation, main transverter is shut down, and exchange micro-grid operation mode is combined simultaneously with alternating current-direct current
The method of operation that micro-capacitance sensor is exchanged in network operation pattern is identical.Direct-current grid realizes voltage by DC side energy storage transverter
Stability contorting, DC side photovoltaic carry out coordination control with load according to the SOC of DC side energy-storage battery in direct-current grid, to protect
The SOC for holding DC side energy-storage battery is maintained in setting range.It is sent out if the SOC of DC side energy-storage battery is beyond setting range
Go out alarm signal.
When alternating current-direct current combines off-grid operation, ac bus voltage is preferentially established using exchange side energy storage transverter, straight
Busbar voltage, main converter Control dc bus are established using diesel-driven generator in the case of the not enough power supply of stream side energy-storage battery
Voltage, DC side photovoltaic can run on MPPT states, and DC side energy storage transverter can be according to the charged shape of DC side energy-storage battery
State is nursed one's health or carries out low-pass filtering to the output of DC side photovoltaic, to realize the stabilization of direct-current grid, reduces voltage wave
It is dynamic.
Alternating current-direct current each off-grid operation when, main transverter is shut down.It exchanges micro-capacitance sensor and preferentially uses exchange side energy storage transverter
It controls and stablizes ac bus voltage and frequency, diesel-driven generator is in hot standby or shutdown status at this time.In exchange side energy storage electricity
Ac bus voltage and frequency are stablized using diesel-driven generator in the case of the energy storage not enough power supply in pond.Exchange the light in micro-capacitance sensor
Volt, wind turbine, load coordinate control on the basis of micro-capacitance sensor stable operation and realize optimization operation.The independent off-network fortune of direct-current grid
Row is identical with the method for operation of direct-current grid in the grid-connected direct current off-grid operation pattern of above-mentioned exchange.
Specifically, when following various operational mode switchings are introduced, Fig. 3-6 are refer to, wherein, Fig. 3 is this hair
A kind of alternating current-direct current mixing micro-capacitance sensor of bright offer from alternating current-direct current each off-grid operation switch to joint off-grid operation or from exchange simultaneously
Net direct current off-network switchs to the process flow diagram flow chart for combining grid-connected control method；Fig. 4 is a kind of alternating current-direct current mixing provided by the invention
Micro-capacitance sensor switchs to the process flow diagram flow chart of the respective control method of off-grid operation of alternating current-direct current from joint off-grid operation；Fig. 5 is the present invention
A kind of alternating current-direct current mixing micro-capacitance sensor provided is from the process flow for combining the control method for switching to joint off-grid operation that is incorporated into the power networks
Figure；For a kind of alternating current-direct current mixing micro-capacitance sensor provided by the invention, from alternating current-direct current, each off-grid operation switchs to joint off-grid operation to Fig. 6
Or switch to the process flow diagram flow chart for combining grid-connected control method from grid-connected direct current off-network is exchanged.
Specifically, Fig. 3 is refer to, when the first instruction is specially that each off-grid operation switchs to joint off-grid operation from alternating current-direct current
Instruction or from when exchanging grid-connected direct current off-network and switching to combine grid-connected instruction, then according to handover mechanism by present mode of operation
The process for being switched to preset running mode is specially：
Step S201：Alternating current-direct current micro electric network coordination controller generates the grid-connected instruction of direct current；
It is understood that either from alternating current-direct current each off-grid operation switch to joint off-grid operation or person from exchange simultaneously
Net direct current off-network, which switchs to combine, to be incorporated into the power networks, and is all that DC side is grid-connected here.
Step S202：DC micro-electric net controller controls the DC side of main transverter to open after the grid-connected instruction of direct current is obtained
It closes and closes, and issue DC constant voltage to DC side energy storage transverter and turn the sagging operating instruction of DC voltage；
DC side energy storage transverter, will be from DC constant voltage after receiving DC constant voltage and turning the sagging operating instruction of DC voltage
Turn the sagging operation of DC voltage.
Step S203：Alternating current-direct current micro electric network coordination controller issues DC side constant pressure enabled instruction to main transverter so that
Main converter Control DC bus-bar voltage constant pressure；
It is understood that when DC side is grid-connected, main transverter to DC side and exchange side except that can carry out power friendship
It changes, can also control DC bus-bar voltage constant pressure.
Step S204：DC micro-electric net controller issues the sagging invariable power that turns of DC voltage to DC side energy storage transverter and transports
Row instruction.
When direct-current grid carries out output-constant operation, DC micro-electric net controller is according to the SOC of DC side energy-storage battery
Situation is nursed one's health or carries out low-pass filtering to the output of DC side photovoltaic.
Specifically, Fig. 4 is refer to, when the first instruction is specially to switch to alternating current-direct current each off-grid operation from joint off-grid operation
Instruction when, then present mode of operation is switched to the process of preset running mode according to handover mechanism is specially：
Step S301：Alternating current-direct current micro electric network coordination controller according to control DC bus-bar voltage constant pressure main transverter work(
The generation of rate value adjusts the second instruction of the exchange power of main transverter；
Step S302：DC micro-electric net controller is fair to switching by the exchange power adjustment of main transverter according to the second instruction
Perhaps exchange in power bracket；
Here can be by adjusting the output power of DC side energy storage transverter, and then realize the exchange work(to main transverter
The adjustment of rate.
Step S303：DC micro-electric net controller is issued to DC side energy storage transverter switchs to direct current by output-constant operation
The vertical operating instruction of pressure；
Step S304：Alternating current-direct current micro electric network coordination controller controls main transverter to shut down；
Step S305：DC micro-electric net controller controls the DC side switch of main transverter to disconnect；
It is understood that DC side here switchs the K3 in corresponding diagram 1, furthermore it is also possible to control main transverter
The switch (K2 in corresponding diagram 1) of exchange side disconnects, and is specifically determined using which kind of method according to actual conditions.
Step S306：DC micro-electric net controller is issued to DC side energy storage transverter turns constant pressure fortune by DC voltage is sagging
Row instruction.
Specifically, Fig. 5 is refer to, when exchange side basic generation unit includes exchange side energy-storage battery and diesel-driven generator and the
One instruction be specially from combine be incorporated into the power networks the instruction for switching to joint off-grid operation when, then foundation handover mechanism will currently run mould
The process that formula is switched to preset running mode is specially：
Step S401：Power to the switching that alternating current-direct current micro electric network coordination controller adjusts grid entry point allows in power bracket；
Here at the K1 in grid entry point namely Fig. 1, in addition, impact during to reduce grid-connected, needs exist for adjust simultaneously
The power of site to switching allows in power bracket.Here switching allows power bracket to be the rule by alternating current-direct current mixing micro-capacitance sensor
Mould determines.
Here the power to exchange side micro-capacitance sensor can be carried out by adjusting exchange side energy storage transverter or diesel-driven generator
It is adjusted, it is, of course, also possible to be adjusted using other methods, the present invention is not particularly limited herein.
Step S402：Alternating current-direct current micro electric network coordination controller according to the performance number of main transverter, the performance number of grid entry point with
And the state-of-charge generation of exchange side energy-storage battery establishes ac bus electricity using exchange side energy storage transverter or diesel-driven generator
3rd instruction of pressure；
Step S403：Exchange micro-capacitance sensor controller according to the 3rd instruction correspondingly control exchange side energy storage transverter or
Diesel-driven generator is to the sagging method of operation；
It is understood that when the 3rd instruction refers to establish ac bus voltage using exchange side energy storage transverter, then
Exchange side energy storage transverter is controlled to the sagging method of operation；When the 3rd instruction refers to establish ac bus electricity using diesel-driven generator
During pressure, then diesel-driven generator is controlled to the sagging method of operation.
Step S404：The switch for exchanging micro-capacitance sensor controller control grid entry point disconnects；
Here switch, that is, K1 of grid entry point.
Step S405：Exchange micro-capacitance sensor controller according to the 3rd instruction correspondingly control exchange side energy storage transverter or
Diesel-driven generator switchs to constant voltage constant frequency operational mode by sagging operational mode.
It is understood that above-mentioned is to include exchange side energy-storage battery and diesel-driven generator to working as exchange side basic generation unit
When the introduction done, when exchange side basic generation unit only includes exchange side energy-storage battery or diesel-driven generator, then control method
It is similar, details are not described herein by the present invention.
Specifically, Fig. 6 is refer to, when exchange side basic generation unit includes exchange side energy-storage battery and diesel-driven generator and the
One instruction is specially that off-grid operation switchs to combine the instruction being incorporated into the power networks or each off-network switchs to exchange from alternating current-direct current from combining
During the off-grid instruction of grid-connected direct current, then the process that present mode of operation is switched to preset running mode according to handover mechanism is specific
It is：
Step S501：The generation of alternating current-direct current micro electric network coordination controller exchanges grid-connected instruction；
It is incorporated into the power networks or from the respective off-network of alternating current-direct current it is understood that either switching to combine from joint off-grid operation
Switch to exchange grid-connected direct current off-network, be all that exchange side is grid-connected here.
Step S502：Micro-capacitance sensor controller is exchanged after obtaining and exchanging grid-connected instruction, control exchange side energy storage transverter or
Person's diesel-driven generator issues constant voltage constant frequency and turns sagging operating instruction；
Step S503：Micro-capacitance sensor controller is exchanged when the voltage amplitude value difference of the switch both sides of grid entry point meets the first default item
When the phase difference of the switch both sides of part and grid entry point meets the second preset condition, the switch of grid entry point is controlled to be closed；
It is understood that whether the voltage amplitude value difference for needing exist for the switch K1 both sides of detection grid entry point meets first in advance
If condition, if it is satisfied, judging that the phase difference of the switch both sides of grid entry point meets the second preset condition again；If not satisfied, then to
Exchange side energy storage transverter or diesel-driven generator issue voltage magnitude regulating command, until the voltage of the switch K1 both sides of grid entry point
Difference in magnitude meets the first preset condition.
In addition, it is also necessary to whether the voltage phase difference of the switch K1 both sides of grid entry point meets the second preset condition, if satisfied,
The switch K1 for exchanging micro-capacitance sensor controller control grid entry point is closed；If being unsatisfactory for always in preset time range,
Frequency adjustment instructions are issued to exchange side energy storage transverter or diesel-driven generator, until the voltage phase of the switch K1 both sides of grid entry point
Potential difference meets the second preset condition.
Step S504：Exchange micro-capacitance sensor controller issues sagging operation to exchange side energy storage transverter and turns output-constant operation and refer to
Order, while issue diesel-driven generator halt instruction.
After the switch K1 of grid entry point is closed, exchange micro-capacitance sensor controller issues sagging fortune to exchange side energy storage transverter
Row turns output-constant operation instruction, and issues diesel-driven generator halt instruction simultaneously.Exchange side energy storage transverter and diesel-driven generator
Being correctly completed instruction, then transfer process terminates.
It is understood that it is understood that above-mentioned simply include exchange side energy storage to working as exchange side basic generation unit
The introduction done when battery and diesel-driven generator, when exchange side basic generation unit only includes exchange side energy-storage battery, then step
S504 is to issue sagging operation to exchange side energy storage transverter to turn output-constant operation instruction.It is only wrapped when exchange side basic generation unit
When including diesel-driven generator, then step S504 is to issue diesel-driven generator halt instruction.
The present invention provides a kind of control method of alternating current-direct current mixing micro-capacitance sensor, this method includes receiving from current operation mould
Formula switchs to the first instruction of preset running mode；According to the first instruction calls and the first corresponding handover mechanism of instruction；Foundation
Present mode of operation is switched to preset running mode by handover mechanism.The capacity that the present invention is suitable for DC side basic generation unit is small
In the alternating current-direct current mixing micro-capacitance sensor of the capacity of exchange side basic generation unit, a variety of operation moulds of alternating current-direct current mixing micro-capacitance sensor can be supported
Stabilization and economical operation under formula, and can realize taking over seamlessly between different mode, optimize supply network structure and operation
The diversity of mode while improving distributed energy utilization ratio, also improves the power supply reliability of critical load.
It is corresponding with above method embodiment, it refer to shown in Fig. 7, Fig. 7 mixes for a kind of alternating current-direct current provided by the invention
The structure diagram of the control system of micro-capacitance sensor is closed, in the alternating current-direct current mixing micro-capacitance sensor, the capacity of DC side basic generation unit is small
In the capacity of exchange side basic generation unit, wherein, DC side basic generation unit includes DC side energy-storage battery, the main power generation of exchange side
Equipment includes exchange side energy-storage battery and/or diesel-driven generator, which includes instruction reception unit and perform system 2, energy
Management system 1 includes command reception system 11 and calling system 12, wherein：
Command reception system 11, for receiving the first instruction for switching to preset running mode from present mode of operation；
Calling system 12, for according to the first instruction calls and the first corresponding handover mechanism of instruction；
Execution system 2, for present mode of operation to be switched to preset running mode according to handover mechanism.
Preferably, when first instruction be specially from alternating current-direct current each off-grid operation switch to joint off-grid operation instruction or
When switching to combine grid-connected instruction from the grid-connected direct current off-network of exchange, then perform system 2 and specifically include alternating current-direct current micro electric network coordination control
Device and DC micro-electric net controller processed, wherein：
Alternating current-direct current micro electric network coordination controller, for generating the grid-connected instruction of direct current；DC side constant pressure is issued to main transverter
Enabled instruction so that main converter Control DC bus-bar voltage constant pressure；
DC micro-electric net controller, for the DC side of main transverter switch after the grid-connected instruction of direct current is obtained, to be controlled to close
It closes, and issues DC constant voltage to DC side energy storage transverter and turn the sagging operating instruction of DC voltage；To DC side energy storage transverter
The sagging output-constant operation that turns of DC voltage is issued to instruct.
Preferably, when the first instruction is specially to switch to alternating current-direct current each instruction of off-grid operation from joint off-grid operation,
It then performs system 2 and specifically includes alternating current-direct current micro electric network coordination controller and DC micro-electric net controller, wherein：
Alternating current-direct current micro electric network coordination controller, for the performance number of the main transverter according to control DC bus-bar voltage constant pressure
Generation adjusts the second instruction of the exchange power of main transverter；Main transverter is controlled to shut down；
DC micro-electric net controller, for allowing to hand over to switching by the exchange power adjustment of main transverter according to the second instruction
It changes in power bracket；It is issued to DC side energy storage transverter and the sagging operating instruction of DC voltage is switched to by output-constant operation；Control
The DC side switch of main transverter disconnects；It is issued to DC side energy storage transverter and turns constant-pressure operation instruction by DC voltage is sagging.
Preferably, when exchange side basic generation unit includes exchange side energy-storage battery and diesel-driven generator and the first instruction is specific
For from combine be incorporated into the power networks the instruction for switching to joint off-grid operation when, then perform system 2 and specifically include alternating current-direct current micro electric network coordination
Controller with exchange micro-capacitance sensor controller, wherein：
Alternating current-direct current micro-capacitance sensor controller, power to the switching for adjusting grid entry point allow in power bracket；It is changed according to master
The state-of-charge generation of the performance number of device, the performance number of grid entry point and exchange side energy-storage battery is flowed using the exchange side energy storage change of current
Device or diesel-driven generator establish the 3rd instruction of ac bus voltage；
Micro-capacitance sensor controller is exchanged, for correspondingly controlling exchange side energy storage transverter or diesel oil according to the 3rd instruction
Generator is to the sagging method of operation；The switch of grid entry point is controlled to disconnect；Exchange side energy storage is correspondingly controlled according to the 3rd instruction
Transverter or diesel-driven generator switch to constant voltage constant frequency operational mode by sagging operational mode.
Preferably, when exchange side basic generation unit includes exchange side energy-storage battery and diesel-driven generator and the first instruction is specific
For switch to combine from joint off-grid operation the instruction be incorporated into the power networks or from alternating current-direct current each off-network switch to exchange grid-connected direct current from
During the instruction of net, then perform system 2 and specifically include alternating current-direct current micro electric network coordination controller and exchange micro-capacitance sensor controller, wherein：
Alternating current-direct current micro electric network coordination controller exchanges grid-connected instruction for generating；
Micro-capacitance sensor controller is exchanged, for after the grid-connected instruction of exchange is obtained, controlling exchange side energy storage transverter or bavin
Fry dried food ingredients motor issues constant voltage constant frequency and turns sagging operating instruction；It is preset when the voltage amplitude value difference of the switch both sides of grid entry point meets first
When the phase difference of the switch both sides of condition and grid entry point meets the second preset condition, the switch of grid entry point is controlled to be closed；To exchange
Side energy storage transverter issues sagging operation and turns output-constant operation instruction, while issues diesel-driven generator halt instruction.
Specific introduction for the control system of alternating current-direct current mixing micro-capacitance sensor provided by the invention refer to above method reality
Example is applied, details are not described herein by the present invention.
The present invention provides a kind of control system of alternating current-direct current mixing micro-capacitance sensor, which includes command reception system, uses
Switch to the first instruction of preset running mode from present mode of operation in reception；Calling system, for according to the first instruction calls
With the first corresponding handover mechanism of instruction；Execution system, it is default for being switched to present mode of operation according to handover mechanism
Operational mode.The present invention is suitable for alternating current-direct current of the capacity less than the capacity of exchange side basic generation unit of DC side basic generation unit
Micro-capacitance sensor is mixed, the stabilization under alternating current-direct current mixing micro-capacitance sensor plurality of operating modes and economical operation can be supported, and can be realized
Taking over seamlessly between different mode optimizes the diversity of supply network structure and the method for operation, improves distributed energy and utilizes
While efficiency, the power supply reliability of critical load is also improved.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so description is fairly simple, related part is said referring to method part
It is bright.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only include that
A little elements, but also including other elements that are not explicitly listed or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except also there are other identical elements in the process, method, article or apparatus that includes the element.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use the present invention.
A variety of modifications of these embodiments will be apparent for those skilled in the art, it is as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one
The most wide scope caused.
Claims (8)
1. a kind of control method of alternating current-direct current mixing micro-capacitance sensor, in the alternating current-direct current mixing micro-capacitance sensor, DC side basic generation unit
Capacity be less than exchange side basic generation unit capacity, wherein, the DC side basic generation unit include DC side energy-storage battery,
The exchange side basic generation unit includes exchange side energy-storage battery and/or diesel-driven generator, which is characterized in that this method includes：
Receive the first instruction for switching to preset running mode from present mode of operation；
According to first instruction calls and the described first corresponding handover mechanism of instruction；
Present mode of operation is switched to the preset running mode according to the handover mechanism；
Wherein, when described first instruction be specially from alternating current-direct current each off-grid operation switch to joint off-grid operation instruction or from
When exchanging grid-connected direct current off-network and switching to combine grid-connected instruction, then present mode of operation is switched to institute according to the handover mechanism
The process for stating preset running mode is specially：
Alternating current-direct current micro electric network coordination controller generates the grid-connected instruction of direct current；
DC micro-electric net controller controls the DC side of main transverter to switch and is closed after the grid-connected instruction of direct current is obtained, and
DC constant voltage, which is issued, to DC side energy storage transverter turns the sagging operating instruction of DC voltage；
The alternating current-direct current micro electric network coordination controller issues DC side constant pressure enabled instruction to the main transverter so that the master
Converter Control DC bus-bar voltage constant pressure；
The DC micro-electric net controller issues the sagging output-constant operation that turns of DC voltage to the DC side energy storage transverter and refers to
Order.
2. the control method of alternating current-direct current mixing micro-capacitance sensor as described in claim 1, which is characterized in that when the described first instruction tool
Body be from joint off-grid operation switch to alternating current-direct current each the instruction of off-grid operation when, then will currently be run according to the handover mechanism
Pattern switching is that the process of the preset running mode is specially：
Alternating current-direct current micro electric network coordination controller generates adjustment according to the performance number of the main transverter of control DC bus-bar voltage constant pressure
Second instruction of the exchange power of main transverter；
The exchange power adjustment of the main transverter is allowed to hand over by DC micro-electric net controller according to the described second instruction to switching
It changes in power bracket；
The DC micro-electric net controller is issued to DC side energy storage transverter switchs to the sagging fortune of DC voltage by output-constant operation
Row instruction；
The alternating current-direct current micro electric network coordination controller control main transverter is shut down；
The DC micro-electric net controller controls the DC side switch of the main transverter to disconnect；
The DC micro-electric net controller is issued to the DC side energy storage transverter to be referred to by the sagging constant-pressure operation that turns of DC voltage
Order.
3. the control method of alternating current-direct current mixing micro-capacitance sensor as described in claim 1, which is characterized in that when the main hair of the exchange side
Electric equipment includes exchange side energy-storage battery and diesel-driven generator and first instruction is specially to switch to join from combining to be incorporated into the power networks
When closing the instruction of off-grid operation, then present mode of operation is switched to the mistake of the preset running mode according to the handover mechanism
Journey is specially：
Power to the switching that alternating current-direct current micro electric network coordination controller adjusts grid entry point allows in power bracket；
The alternating current-direct current micro electric network coordination controller is according to the performance number of main transverter, the performance number of the grid entry point and described
The state-of-charge generation of exchange side energy-storage battery establishes ac bus using the exchange side energy storage transverter or diesel-driven generator
3rd instruction of voltage；
Exchange micro-capacitance sensor controller correspondingly controls the exchange side energy storage transverter or described according to the described 3rd instruction
Diesel-driven generator is to the sagging method of operation；
The exchange micro-capacitance sensor controller controls the switch of the grid entry point to disconnect；
It is described exchange micro-capacitance sensor controller according to the described 3rd instruction correspondingly control the exchange side energy storage transverter or
The diesel-driven generator switchs to constant voltage constant frequency operational mode by sagging operational mode.
4. the control method of alternating current-direct current mixing micro-capacitance sensor as described in claim 1, which is characterized in that when the main hair of the exchange side
It is specially to switch to join from joint off-grid operation that electric equipment, which includes exchange side energy-storage battery and diesel-driven generator and first instruction,
Merge network operation instruction or from alternating current-direct current each off-network switchs to exchange the off-grid instruction of grid-connected direct current when, then cut according to described in
Present mode of operation is switched to the process of the preset running mode by the system of changing planes：
The generation of alternating current-direct current micro electric network coordination controller exchanges grid-connected instruction；
Micro-capacitance sensor controller is exchanged after the grid-connected instruction of exchange is obtained, controls exchange side energy storage transverter or the diesel oil
Generator issues constant voltage constant frequency and turns sagging operating instruction；
The exchange micro-capacitance sensor controller meets the first preset condition and described when the voltage amplitude value difference of the switch both sides of grid entry point
When the phase difference of the switch both sides of grid entry point meets the second preset condition, the switch of the grid entry point is controlled to be closed；
The exchange micro-capacitance sensor controller issues sagging operation to the exchange side energy storage transverter and turns output-constant operation instruction, together
When issue diesel-driven generator halt instruction.
5. a kind of control system of alternating current-direct current mixing micro-capacitance sensor, in the alternating current-direct current mixing micro-capacitance sensor, DC side basic generation unit
Capacity be less than exchange side basic generation unit capacity, wherein, the DC side basic generation unit include DC side energy-storage battery,
The exchange side basic generation unit includes exchange side energy-storage battery and/or diesel-driven generator, which is characterized in that the system includes referring to
Receiving unit and execution system are made, Energy Management System includes command reception system and calling system, wherein：
Described instruction reception system, for receiving the first instruction for switching to preset running mode from present mode of operation；
The calling system, for according to first instruction calls and the described first corresponding handover mechanism of instruction；
Execution system, for present mode of operation to be switched to the preset running mode according to the handover mechanism；
Wherein, when described first instruction be specially from alternating current-direct current each off-grid operation switch to joint off-grid operation instruction or from
When exchanging grid-connected direct current off-network and switching to combine grid-connected instruction, then the execution system specifically includes alternating current-direct current micro electric network coordination control
Device and DC micro-electric net controller processed, wherein：
The alternating current-direct current micro electric network coordination controller, for generating the grid-connected instruction of direct current；DC side constant pressure is issued to main transverter
Enabled instruction so that the main converter Control DC bus-bar voltage constant pressure；
The DC micro-electric net controller, for after the grid-connected instruction of direct current is obtained, controlling the direct current of the main transverter
Side switch is closed, and is issued DC constant voltage to DC side energy storage transverter and turned the sagging operating instruction of DC voltage；To the direct current
Side energy storage transverter issues the sagging output-constant operation that turns of DC voltage and instructs.
6. the control system of alternating current-direct current mixing micro-capacitance sensor as claimed in claim 5, which is characterized in that when the described first instruction tool
Body be from joint off-grid operation switch to alternating current-direct current each the instruction of off-grid operation when, then the execution system specifically includes alternating current-direct current
Micro electric network coordination controller and DC micro-electric net controller, wherein：
The alternating current-direct current micro electric network coordination controller, for the performance number of the main transverter according to control DC bus-bar voltage constant pressure
Generation adjusts the second instruction of the exchange power of main transverter；The main transverter is controlled to shut down；
The DC micro-electric net controller, for according to the described second instruction by the exchange power adjustment of the main transverter to cutting
Changing allows to exchange in power bracket；To DC side energy storage transverter issue by output-constant operation switch to DC voltage it is sagging operation refer to
Order；The DC side of the main transverter is controlled to switch to disconnect；It is issued to the DC side energy storage transverter sagging by DC voltage
Turn constant-pressure operation instruction.
7. the control system of alternating current-direct current mixing micro-capacitance sensor as claimed in claim 5, which is characterized in that when the main hair of the exchange side
Electric equipment includes exchange side energy-storage battery and diesel-driven generator and first instruction is specially to switch to join from combining to be incorporated into the power networks
When closing the instruction of off-grid operation, then the execution system specifically includes alternating current-direct current micro electric network coordination controller and exchanges micro-capacitance sensor control
Device processed, wherein：
The alternating current-direct current micro-capacitance sensor controller, power to the switching for adjusting grid entry point allow in power bracket；It is changed according to master
The state-of-charge generation for flowing the performance number of device, the performance number of the grid entry point and the exchange side energy-storage battery uses the friendship
Stream side energy storage transverter or diesel-driven generator establish the 3rd instruction of ac bus voltage；
The exchange micro-capacitance sensor controller, for correspondingly controlling the exchange side energy storage transverter according to the described 3rd instruction
Or the diesel-driven generator is to the sagging method of operation；The switch of the grid entry point is controlled to disconnect；According to the described 3rd instruction phase
The exchange side energy storage transverter or the diesel-driven generator is accordingly controlled to switch to constant voltage constant frequency fortune by sagging operational mode
Row pattern.
8. the control system of alternating current-direct current mixing micro-capacitance sensor as claimed in claim 5, which is characterized in that when the main hair of the exchange side
It is specially to switch to join from joint off-grid operation that electric equipment, which includes exchange side energy-storage battery and diesel-driven generator and first instruction,
Merge network operation instruction or from alternating current-direct current each off-network switchs to exchange the off-grid instruction of grid-connected direct current when, then it is described to perform system
System specifically includes alternating current-direct current micro electric network coordination controller and exchanges micro-capacitance sensor controller, wherein：
The alternating current-direct current micro electric network coordination controller exchanges grid-connected instruction for generating；
The exchange micro-capacitance sensor controller, for after the grid-connected instruction of the exchange is obtained, control exchange side energy storage transverter or
Diesel-driven generator described in person issues constant voltage constant frequency and turns sagging operating instruction；When the voltage amplitude value difference of the switch both sides of grid entry point meets
When the phase difference of the switch both sides of first preset condition and the grid entry point meets the second preset condition, the grid entry point is controlled
Switch is closed；Sagging operation is issued to the exchange side energy storage transverter and turns output-constant operation instruction, while issues diesel generation
Machine halt instruction.
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