CN106099977A - Be suitable to energy storage control method and the system of the switching of single-phase micro-capacitance sensor pattern - Google Patents
Be suitable to energy storage control method and the system of the switching of single-phase micro-capacitance sensor pattern Download PDFInfo
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- CN106099977A CN106099977A CN201610519221.9A CN201610519221A CN106099977A CN 106099977 A CN106099977 A CN 106099977A CN 201610519221 A CN201610519221 A CN 201610519221A CN 106099977 A CN106099977 A CN 106099977A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The present invention relates to a kind of energy storage control method being suitable to the switching of single-phase micro-capacitance sensor pattern and system, the method includes: when single-phase micro-capacitance sensor is operated in grid-connect mode, and the energy-storage system controlling single-phase micro-capacitance sensor enters PQ control model；Judging whether power distribution network breaks down, the most single-phase micro-capacitance sensor switches to off-network pattern, and controls energy-storage system and switch to VF control model；When single-phase micro-capacitance sensor is operated in off-network pattern, it is judged that whether single-phase micro-capacitance sensor meets grid-connected conditions, if it is not, then keep the control model of the mode of operation of single-phase micro-capacitance sensor and energy-storage system constant.The present invention is by energy-storage system PQ control model and the flexible switching of VF control model, effectively cut down the renewable energy power generation output such as photovoltaic, wind-powered electricity generation intermittence and the deficiency of randomness, realize the equilibrium,transient of internal energy, for ensureing that the also off-network of micro-capacitance sensor takes over seamlessly and guarantees that in single-phase micro-capacitance sensor, the power supply reliability of sensitive load has important function.
Description
Technical field
The present invention relates to field of power, particularly relate to a kind of energy storage being suitable to the switching of single-phase micro-capacitance sensor pattern and control
Method and system.
Background technology
Micro-capacitance sensor, can be effective by multiple distributed power source, load, energy storage as the higher structure form of distributed power generation
Organize, both can be incorporated into the power networks with outside power distribution network, it is also possible to off-network is run, and its Supply Security and reliability are relatively
High.Along with the fast development of the regenerative resource distributed power generation such as wind-powered electricity generation, photovoltaic, comprise the renewable of wind-powered electricity generation and photovoltaic
Energy micro-capacitance sensor has a good application prospect.Along with distributed power source and the development of micro-capacitance sensor, photovoltaic system and energy storage system
System ratio shared by micro-capacitance sensor is more and more higher.
The problems such as power-balance, stability and the quality of power supply in micro-grid system are stored up, it is necessary to be equipped with defeated in order to solve light
Go out the energy-storage system that power is more stable, and according to predetermined control strategy, it is achieved the instantaneous of micro-grid system internal energy is put down
Weighing apparatus.Seamless switching between micro-capacitance sensor and power distribution network, it is ensured that the power supply reliability of important load in micro-capacitance sensor, to power distribution network
Safe and stable operation also there is important effect, the important technology feature as micro-capacitance sensor causes and payes attention to widely.
Summary of the invention
Based on this, for solving the problems of the prior art, the present invention provides a kind of and is suitable to what single-phase micro-capacitance sensor pattern switched
Energy storage control method and system, ensure that the also off-network of micro-capacitance sensor takes over seamlessly, it is ensured that in micro-capacitance sensor, the power supply of important load is reliable
Property, it is achieved the equilibrium,transient of micro-capacitance sensor internal energy.
For achieving the above object, the embodiment of the present invention is by the following technical solutions:
A kind of energy storage control method being suitable to the switching of single-phase micro-capacitance sensor pattern, comprises the steps:
When single-phase micro-capacitance sensor is operated in grid-connect mode, the energy-storage system controlling described single-phase micro-capacitance sensor enters PQ control mould
Formula；
Judging whether power distribution network breaks down, the most described single-phase micro-capacitance sensor switches to off-network pattern, and controls described
Energy-storage system switches to VF control model；
When described single-phase micro-capacitance sensor is operated in off-network pattern, it is judged that whether described single-phase micro-capacitance sensor meets grid-connected conditions,
If it is not, then keep the control model of the mode of operation of described single-phase micro-capacitance sensor and described energy-storage system constant.
The present invention also provides for a kind of energy storage control system being suitable to the switching of single-phase micro-capacitance sensor pattern, including:
PQ control module, for when single-phase micro-capacitance sensor is operated in grid-connect mode, controls the energy storage of described single-phase micro-capacitance sensor
System enters PQ control model；
Breakdown judge module, is used for judging whether power distribution network breaks down；
VF control module, for breaking down at described power distribution network, described single-phase micro-capacitance sensor is when switching to off-network pattern, control
Make described energy-storage system and switch to VF control model；
Conditional judgment module, for when described single-phase micro-capacitance sensor is operated in off-network pattern, it is judged that described single-phase micro-capacitance sensor
Whether meet grid-connected conditions；If it is not, the most described VF control module keeps the mode of operation of described single-phase micro-capacitance sensor and described energy storage
The control model of system is constant.
Technique scheme based on the present invention, when single-phase micro-capacitance sensor pattern switches, controls mould by energy-storage system PQ
The flexible switching of formula and VF control model, effectively cut down the renewable energy power generation output such as photovoltaic, wind-powered electricity generation intermittent and with
The deficiency of machine, it is achieved the equilibrium,transient of internal energy, for ensureing that the also off-network of micro-capacitance sensor takes over seamlessly and guarantees single-phase micro-
In electrical network, the power supply reliability of sensitive load has important function.
Accompanying drawing explanation
Fig. 1 is the energy storage control method flow process in one embodiment being suitable to the switching of single-phase micro-capacitance sensor pattern of the present invention
Schematic diagram；
Fig. 2 is the principle schematic of energy-storage system in the embodiment of the present invention；
Fig. 3 is the schematic flow sheet of PQ control model in the embodiment of the present invention；
Fig. 4 is the schematic flow sheet of VF control model in the embodiment of the present invention；
Fig. 5 is the simulation experiment result signal that in the embodiment of the present invention, single-phase micro-capacitance sensor is left net pattern by grid-connect mode
Figure；
Fig. 6 is the simulation experiment result signal that in the embodiment of the present invention, single-phase micro-capacitance sensor is turned grid-connect mode by off-network pattern
Figure；
Fig. 7 is the energy storage control system structure in one embodiment being suitable to the switching of single-phase micro-capacitance sensor pattern of the present invention
Schematic diagram.
Detailed description of the invention
Below in conjunction with preferred embodiment and accompanying drawing, present disclosure is described in further detail.Obviously, hereafter institute
The embodiment described is only used for explaining the present invention, rather than limitation of the invention.Based on the embodiment in the present invention, this area is general
The every other embodiment that logical technical staff is obtained under not making creative work premise, broadly falls into present invention protection
Scope.Although it should be appreciated that hereinafter use term " first ", " second " etc. to describe various information, but these are believed
Breath should not necessarily be limited by these terms, and these terms are only used for same type of information is distinguished from each other out.Such as, without departing from this
In the case of bright scope, " first " information can also be referred to as " second " information, similar, and " second " information can also be referred to as
" first " information.It also should be noted that, for the ease of describing, accompanying drawing illustrate only part related to the present invention and
Not all content.
Fig. 1 is the energy storage control method flow process in one embodiment being suitable to the switching of single-phase micro-capacitance sensor pattern of the present invention
Schematic diagram, as it is shown in figure 1, the energy storage control method being suitable to the switching of single-phase micro-capacitance sensor pattern in the present embodiment includes following step
Rapid:
Step S100, when single-phase micro-capacitance sensor is operated in grid-connect mode, the energy-storage system controlling described single-phase micro-capacitance sensor enters
Enter PQ control model；
Single-phase micro-capacitance sensor has two kinds of mode of operations, and one is grid-connect mode, and the most single-phase micro-capacitance sensor is incorporated into the power networks with power distribution network,
Another kind is off-network pattern, and single-phase micro-capacitance sensor off-network is run.In the present embodiment, it is operated in grid-connect mode when single-phase micro-capacitance sensor
Time, the energy-storage system of single-phase micro-capacitance sensor enters PQ control model, now has power distribution network to provide voltage support, the storage of single-phase micro-capacitance sensor
System can be treated to a constant power output, under PQ control model, it is desirable to energy-storage system output is meritorious with idle is
Controlled, thus ensure the balance of generating and electricity consumption.
Fig. 2 is the principle schematic of energy-storage system, in the optional embodiment of one, with reference to shown in Fig. 2, Fig. 3, in storage
After energy system enters PQ control model, the control process of energy-storage system comprises the following steps:
Obtain the phase theta of described energy-storage system real-time output voltage u, according to the phase theta of real-time output voltage u, and give
Fixed energy-storage system active power of output P*And reactive power Q*, it is thus achieved that the grid-connected Voltage Reference phase theta of energy-storage system ', specifically join
According to following formula:
Then according to grid-connected Voltage Reference phase theta ', active-power P*, reactive power Q*And the bus electricity of single-phase micro-capacitance sensor
Pressure VgObtain the grid-connected reference current i of energy-storage systemref, referring in particular to below equation:
Finally according to grid-connected reference current irefCarry out energy storage control so that grid-connected voltage-phase and grid-connected Voltage Reference phase
The difference of position θ ' is minimum, grid-connected current and grid-connected reference current irefDifference minimum, it is achieved single-phase micro-capacitance sensor is switched to by off-network pattern
Stable operation after grid-connect mode.
Optionally, energy-storage system active power of output P*And reactive power Q*Can be by the central controller of single-phase micro-capacitance sensor
Given.The central controller of single-phase micro-capacitance sensor is after the dispatch command receiving power distribution network, it is possible to generate described given energy storage
System active power of output P*And reactive power Q*。
Optionally, according to grid-connected reference current irefThe detailed process carrying out energy storage control can refer to shown in Fig. 3, by grid-connected
Reference current irefPoor with the electric current i of filter inductance in energy-storage system, and to difference iref-i carries out PR control.PR control i.e. than
Example resonance controls, and is made up of proportional component and resonance link, it is possible to achieve the zero steady state error control to exchange input, the tool that PR controls
Body process can refer to prior art, and it will not go into details herein.The result controlled by PR in the present embodiment is the most defeated with energy-storage system
Go out voltage u to be added, generate the pwm signal for the energy storage controller in energy-storage system is controlled, according to pwm signal to storage
(i.e. S1, S2, S3 and the S4 shown in Fig. 3 being controlled) can be controlled by controller, it is achieved grid-connected voltage-phase is with grid-connected
Voltage Reference phase theta ' difference is minimum, grid-connected current and grid-connected reference current irefDifference minimum so that single-phase micro-capacitance sensor is by off-network
Pattern keeps after switching to grid-connect mode stably running.
Step S200, it is judged that whether power distribution network breaks down, the most then enter step S300；If it is not, then return step
S100；
After single-phase micro-capacitance sensor is operated in grid-connect mode, the running status of power distribution network is monitored, it is judged that power distribution network is
No breaking down, the most single-phase micro-capacitance sensor switches to off-network pattern, and single-phase micro-capacitance sensor off-network is run；If it is not, the most single-phase micro-electricity
Net keeps grid-connect mode, is incorporated into the power networks with power distribution network.Wherein, the fault of power distribution network includes having a power failure or equipment fault.
Step S300, described single-phase micro-capacitance sensor switches to off-network pattern, and controls described energy-storage system and switch to VF control
Pattern；
After single-phase micro-capacitance sensor switches to off-network pattern, owing to not having the support of power distribution network, energy-storage system switches to VF control
Pattern, by controlling voltage and frequency to meet the demand of sensitive load.
Energy-storage system serves as system main power source under VF control model, sets up and maintain voltage and the frequency of system.One
Plant in optional embodiment, with reference to shown in Fig. 2 and Fig. 4, after energy-storage system switches to VF control model, the control of energy-storage system
Process processed comprises the following steps:
To predeterminated voltage urefDifference u of output voltage u real-time with energy-storage systemref-u carries out PI control, it is thus achieved that energy storage system
The off-network reference current i of systemref', output voltage frequency f real-time to energy-storage system and predeterminated frequency frefDifference f-frefCarry out
PI controls, it is thus achieved that the off-network Voltage Reference phase theta of energy-storage system*；
Then according to off-network Voltage Reference phase theta*With off-network reference current iref' carry out energy storage control, it is achieved export in real time
The amplitude of voltage and frequency constant.
Above-mentioned PI control i.e. proportional plus integral control, including proportional component and integral element, wherein proportional component is in proportion
The deviation of response system, system once occurs in that deviation, and proportional component produces regulation effect immediately to reduce deviation, integral element
Make system eliminate steady-state error, improve errorless margin.By PI control, constitute control partially according to set-point and real output value
Difference, constitutes controlled quentity controlled variable by ratio and the integration of deviation by linear combination, is controlled controlled device.
Optionally, with reference to shown in Fig. 4, according to off-network Voltage Reference phase theta*With off-network reference current iref' carry out energy storage control
The process of system includes:
Off-network Voltage Reference phase theta is calculated by sinusoidal calculations device*Sine value sin θ*, and calculate sin θ*Join with off-network
Examine electric current iref' product sin θ**iref', to sin θ**iref' poor and right with the electric current i of the filter inductance in energy-storage system
The difference obtained carries out PR control.Then result output voltage real-time with the energy-storage system u that PR controls is added generation PWM letter
Number, and according to pwm signal, the energy storage controller in energy-storage system is controlled (i.e. to S1, S2, S3 and the S4 shown in Fig. 3
It is controlled).
Step S400, when described single-phase micro-capacitance sensor is operated in off-network pattern, it is judged that whether described single-phase micro-capacitance sensor meets
Grid-connected conditions, the most then enter step S100；If it is not, then return step S300, i.e. keep single-phase micro-capacitance sensor mode of operation and
The control model of described energy-storage system is constant.
Under single-phase micro-capacitance sensor is operated in off-network pattern, it is judged that whether single-phase micro-capacitance sensor meets grid-connected conditions, such as judge
Power distribution network have a power failure, equipment fault whether have been resolved, if it is, single-phase micro-capacitance sensor be incorporated to power distribution network run, energy-storage system by
VF control mode switch is to PQ pattern, and after ensureing the switching of single-phase micro-capacitance sensor pattern, busbar voltage and frequency stablizes.
Useful in order to verify that the energy storage control method being suitable to the switching of single-phase micro-capacitance sensor pattern in the present embodiment is had
Effect, illustrates below in conjunction with an emulation experiment.
First it is that single-phase micro-capacitance sensor is left the emulation experiment of net pattern by grid-connect mode, after emulation starts, single-phase micro-capacitance sensor
Operating in grid-connect mode, and reach steady-working state, with reference to shown in Fig. 5, given energy-storage system active power of output is
1000W, reactive power is 0Var, sets 1000W purely resistive load and accesses single-phase micro-capacitance sensor.When 0.4s, net side also/off-network control
System switches off, and single-phase micro-capacitance sensor enters island operation state, i.e. switches to off-network pattern, and energy-storage system is cut by PQ control model
Shifting to VF control model, simulation result is as shown in Figure 5.From figure 5 it can be seen that the control mode switch of energy-storage system during 0.4s
Time, all there is minor fluctuations in energy-storage system active power of output, busbar voltage and bus frequency.Wherein, busbar voltage maximum ripple
Move as 0.17V, requirement (the Δ U≤± 7%U of the busbar voltage deviation of satisfied regulationN=15.4V)；Bus frequency maximum fluctuation
For 0.01Hz, meet the requirement (Δ f≤0.1Hz) of the frequency departure of regulation, after the switching of single-phase micro-capacitance sensor pattern busbar voltage and
Frequency keeps stable.
The most single-phase micro-capacitance sensor off-network pattern turns the emulation experiment of grid-connect mode, with reference to shown in Fig. 6, when 0.7s, and place
Single-phase micro-capacitance sensor in off-network pattern meets grid-connected conditions, closed net side also/off-network control switch, single-phase micro-capacitance sensor is incorporated to distribution
Network operation, energy-storage system is by VF control mode switch to PQ control model, and simulation result is as shown in Figure 6.Can from Fig. 6
Going out, when 0.7s energy-storage system switching control pattern, energy-storage system active power of output, busbar voltage and bus frequency all occur
Minor fluctuations.Wherein, busbar voltage maximum fluctuation is 0.15V, meets the requirement of the busbar voltage deviation of regulation；Bus frequency is
Great fluctuation process is 0.02Hz, meets the requirement of the frequency departure of regulation, and after the switching of single-phase micro-capacitance sensor pattern, busbar voltage and frequency are protected
Keep steady fixed.
In sum, the energy storage control method being suitable to the switching of single-phase micro-capacitance sensor pattern in the present embodiment, at single-phase micro-electricity
During the switching of net pattern, by energy-storage system PQ control model and the flexible switching of VF control model, effectively cut down photovoltaic, wind-powered electricity generation etc.
Renewable energy power generation output is intermittent and the deficiency of randomness, for ensure micro-capacitance sensor and off-network takes over seamlessly and really
In declaration form phase micro-capacitance sensor, the power supply reliability of sensitive load has important function.
It should be noted that for aforesaid each method embodiment, in order to simplicity describes, it is all expressed as a series of
Combination of actions, but those skilled in the art should know, and the present invention is not limited by described sequence of movement, because depending on
According to the present invention, some step can use other order or carry out simultaneously.
The energy storage control method of the single-phase micro-capacitance sensor pattern switching according to the invention described above, the present invention also provides for a kind of single-phase
The energy storage control system of micro-capacitance sensor pattern switching, below in conjunction with the accompanying drawings and preferred embodiment is suitable to single-phase micro-capacitance sensor to the present invention
The energy storage control system of pattern switching is described in detail.
Fig. 7 is the energy storage control system structure in one embodiment being suitable to the switching of single-phase micro-capacitance sensor pattern of the present invention
Schematic diagram.As it is shown in fig. 7, the energy storage control system being suitable to the switching of single-phase micro-capacitance sensor pattern in this embodiment includes:
PQ control module 100, for when single-phase micro-capacitance sensor is operated in grid-connect mode, controls the storage of described single-phase micro-capacitance sensor
System can enter PQ control model；
Breakdown judge module 200, is used for judging whether power distribution network breaks down；
VF control module 300, for breaking down at described power distribution network, described single-phase micro-capacitance sensor switches to off-network pattern
Time, control described energy-storage system and switch to VF control model；
Conditional judgment module 400, for when described single-phase micro-capacitance sensor is operated in off-network pattern, it is judged that described single-phase micro-electricity
Whether net meets grid-connected conditions；If it is not, then VF control module 300 keeps the mode of operation of described single-phase micro-capacitance sensor and described energy storage
The control model of system is constant.
In the optional embodiment of one, PQ control module 100 includes:
Phase place acquisition module, for obtaining the phase place of the real-time output voltage of described energy-storage system；
Grid-connected Voltage Reference phase calculation module, for the phase place according to described real-time output voltage, and given storage
Energy system active power of output and reactive power, it is thus achieved that the grid-connected Voltage Reference phase place of described energy-storage system；
Grid-connected reference current computation module, for according to described grid-connected Voltage Reference phase place, described active power, described nothing
The busbar voltage of merit power and described single-phase micro-capacitance sensor obtains the grid-connected reference current of described energy-storage system；
First control module, for carrying out energy storage control according to described grid-connected reference current.
Optionally, the energy storage control system being suitable to the switching of single-phase micro-capacitance sensor pattern in the present embodiment, also include being arranged on
Generation module 500 in the central controller of described single-phase micro-capacitance sensor, for receiving the dispatch command of described power distribution network, generates institute
State given energy-storage system active power of output and reactive power.
In the optional embodiment of one, VF control module 300 includes:
Off-network reference current computation module, the difference for output voltage real-time with described energy-storage system to predeterminated voltage is entered
Row PI controls, it is thus achieved that the off-network reference current of described energy-storage system；
Off-network Voltage Reference phase calculation module, for output voltage frequency real-time to described energy-storage system and predeterminated frequency
Difference carry out PI control, it is thus achieved that the off-network Voltage Reference phase place of described energy-storage system；
Second control module, for carrying out energy storage control according to described off-network Voltage Reference phase place and described off-network reference current
System.
Optionally, the second control module includes:
Sinusoidal calculations module, for calculating the sine value of described off-network Voltage Reference phase place；
Multiplication module, for calculating described sine value and the product of described off-network reference current；
PR controller module, is used for the electric current to the filter inductance in energy-storage system described in described sum of products poor and right
The difference obtained carries out PR control；
PWM control module, for being added generation PWM letter by the result output voltage real-time with described energy-storage system that PR controls
Number, and according to described pwm signal, the energy storage controller in described energy-storage system is controlled.
It is suitable that the above-mentioned energy storage control system being suitable to the switching of single-phase micro-capacitance sensor pattern can perform that the embodiment of the present invention provided
In the energy storage control method of single-phase micro-capacitance sensor pattern switching, possess the corresponding functional module of execution method and beneficial effect, above
The implementation method of each its concrete function of functional module can refer to the description in said method embodiment, is the most no longer gone to live in the household of one's in-laws on getting married
State.
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, not to above-mentioned reality
The all possible combination of each technical characteristic executed in example is all described, but, as long as the combination of these technical characteristics is not deposited
In contradiction, all it is considered to be the scope that this specification is recorded.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but also
Can not therefore be construed as limiting the scope of the patent.It should be pointed out that, come for those of ordinary skill in the art
Saying, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these broadly fall into the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. the energy storage control method being suitable to the switching of single-phase micro-capacitance sensor pattern, it is characterised in that comprise the steps:
When single-phase micro-capacitance sensor is operated in grid-connect mode, the energy-storage system controlling described single-phase micro-capacitance sensor enters PQ control model；
Judging whether power distribution network breaks down, the most described single-phase micro-capacitance sensor switches to off-network pattern, and controls described energy storage
System switches to VF control model；
When described single-phase micro-capacitance sensor is operated in off-network pattern, it is judged that whether described single-phase micro-capacitance sensor meets grid-connected conditions, if it is not,
The control model then keeping the mode of operation of described single-phase micro-capacitance sensor and described energy-storage system is constant.
The energy storage control method being suitable to the switching of single-phase micro-capacitance sensor pattern the most according to claim 1, it is characterised in that in institute
After stating energy-storage system entrance PQ control model, the control process of described energy-storage system comprises the following steps:
Obtain the phase place of the real-time output voltage of described energy-storage system；
According to the phase place of described real-time output voltage, and given energy-storage system active power of output and reactive power, it is thus achieved that
The grid-connected Voltage Reference phase place of described energy-storage system；
According to described grid-connected Voltage Reference phase place, described active power, described reactive power and the mother of described single-phase micro-capacitance sensor
Line voltage obtains the grid-connected reference current of described energy-storage system；
Energy storage control is carried out according to described grid-connected reference current.
The energy storage control method being suitable to the switching of single-phase micro-capacitance sensor pattern the most according to claim 2, it is characterised in that also wrap
Include:
The central controller of described single-phase micro-capacitance sensor, after the dispatch command receiving described power distribution network, generates described given energy storage
System active power of output and reactive power.
The energy storage control method being suitable to the switching of single-phase micro-capacitance sensor pattern the most according to any one of claim 1 to 3, it is special
Levying and be, after described energy-storage system switches to VF control model, the control process of described energy-storage system comprises the following steps:
The difference of predeterminated voltage Yu the real-time output voltage of described energy-storage system is carried out PI control, it is thus achieved that described energy-storage system from
Net reference current；
Output voltage frequency real-time to described energy-storage system carries out PI control with the difference of predeterminated frequency, it is thus achieved that described energy-storage system
Off-network Voltage Reference phase place；
Energy storage control is carried out according to described off-network Voltage Reference phase place and described off-network reference current.
The energy storage control method being suitable to the switching of single-phase micro-capacitance sensor pattern the most according to claim 4, it is characterised in that described
Include according to the process that described off-network Voltage Reference phase place and described off-network reference current carry out energy storage control:
Calculate the sine value of described off-network Voltage Reference phase place；
Calculate described sine value and the product of described off-network reference current；
Poor to the electric current of the filter inductance in energy-storage system described in described sum of products, and the difference obtained is carried out PR control；
The result output voltage real-time with described energy-storage system that PR controls is added generation pwm signal, and according to described pwm signal
Energy storage controller in described energy-storage system is controlled.
6. the energy storage control system being suitable to the switching of single-phase micro-capacitance sensor pattern, it is characterised in that including:
PQ control module, for when single-phase micro-capacitance sensor is operated in grid-connect mode, controls the energy-storage system of described single-phase micro-capacitance sensor
Enter PQ control model；
Breakdown judge module, is used for judging whether power distribution network breaks down；
VF control module, for breaking down at described power distribution network, described single-phase micro-capacitance sensor is when switching to off-network pattern, controls institute
State energy-storage system and switch to VF control model；
Conditional judgment module, for when described single-phase micro-capacitance sensor is operated in off-network pattern, it is judged that whether described single-phase micro-capacitance sensor
Meet grid-connected conditions；If it is not, the most described VF control module keeps the mode of operation of described single-phase micro-capacitance sensor and described energy-storage system
Control model constant.
The energy storage control system being suitable to the switching of single-phase micro-capacitance sensor pattern the most according to claim 6, it is characterised in that described
PQ control module includes:
Phase place acquisition module, for obtaining the phase place of the real-time output voltage of described energy-storage system；
Grid-connected Voltage Reference phase calculation module, for the phase place according to described real-time output voltage, and given energy storage system
System active power of output and reactive power, it is thus achieved that the grid-connected Voltage Reference phase place of described energy-storage system；
Grid-connected reference current computation module, for according to described grid-connected Voltage Reference phase place, described active power, described idle merit
The busbar voltage of rate and described single-phase micro-capacitance sensor obtains the grid-connected reference current of described energy-storage system；
First control module, for carrying out energy storage control according to described grid-connected reference current.
The energy storage control system being suitable to the switching of single-phase micro-capacitance sensor pattern the most according to claim 7, it is characterised in that also wrap
Include the generation module in the central controller being arranged on described single-phase micro-capacitance sensor, for receiving the dispatch command of described power distribution network,
Generate described given energy-storage system active power of output and reactive power.
9., according to the energy storage control system being suitable to the switching of single-phase micro-capacitance sensor pattern according to any one of claim 6 to 8, it is special
Levying and be, described VF control module includes:
Off-network reference current computation module, for carrying out PI to the difference of predeterminated voltage Yu the real-time output voltage of described energy-storage system
Control, it is thus achieved that the off-network reference current of described energy-storage system；
Off-network Voltage Reference phase calculation module, for the difference of output voltage frequency real-time to described energy-storage system with predeterminated frequency
Value carries out PI control, it is thus achieved that the off-network Voltage Reference phase place of described energy-storage system；
Second control module, for carrying out energy storage control according to described off-network Voltage Reference phase place and described off-network reference current.
The energy storage control system being suitable to the switching of single-phase micro-capacitance sensor pattern the most according to claim 9, it is characterised in that institute
State the second control module to include:
Sinusoidal calculations module, for calculating the sine value of described off-network Voltage Reference phase place；
Multiplication module, for calculating described sine value and the product of described off-network reference current；
PR controller module, is used for the electric current to the filter inductance in energy-storage system described in described sum of products poor, and to obtaining
Difference carry out PR control；
PWM control module, for the result output voltage real-time with described energy-storage system that PR controls being added generation pwm signal,
And according to described pwm signal, the energy storage controller in described energy-storage system is controlled.
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