CN104300579B - The control method that a kind of charge controller charges to battery - Google Patents
The control method that a kind of charge controller charges to battery Download PDFInfo
- Publication number
- CN104300579B CN104300579B CN201410546641.7A CN201410546641A CN104300579B CN 104300579 B CN104300579 B CN 104300579B CN 201410546641 A CN201410546641 A CN 201410546641A CN 104300579 B CN104300579 B CN 104300579B
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- battery
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- outer shroud
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000009977 dual effect Effects 0.000 claims abstract description 38
- 230000005611 electricity Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000011217 control strategy Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000007667 floating Methods 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- H02J3/383—
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
-
- 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
Abstract
The control method that a kind of charge controller charges to battery, inner ring are controlled for DC current ring, and outer shroud is controlled for direct current pressure ring.State of the direct current pressure ring control according to simultaneously off-network state and the battery of dual mode inverter, selects the control of photovoltaic battery panel DC voltage outer shroud or accumulator DC pressure outer shroud control.When dual mode inverter is incorporated into the power networks, or off-grid operation and battery are when being in constant-current charge state, the control mode that charge controller is worked simultaneously using photovoltaic battery panel DC voltage outer shroud and DC current ring；When dual mode inverter off-grid operation and battery are in constant-voltage charge state, the control mode that charge controller is worked simultaneously using battery tension outer shroud and DC current ring.Two kinds of direct current pressure rings switch and feedback between in the given of DC voltage when being a set of pi regulator, the control of photovoltaic battery panel DC voltage outer shroud and accumulator DC pressure outer shroud control switching.Described charge controller adopts three staggered modulation.
Description
Technical field
The present invention relates to the control method that a kind of battery charges.
Background technology
Charge controller is to connect photovoltaic battery panel with the hinge with electric loading.Due to photovoltaic battery panel output voltage shakiness
Fixed, so directly can not be applied to load by photovoltaic battery panel, need solar energy is changed into after electric energy and store in battery,
Powered to the load by battery again.The state of charge controller real-time detection battery, according to Optimal Control Strategy to battery
It is charged.
In centralized high-power light storage integrated applied system, photovoltaic battery panel is by charge controller to batteries
Charge, and dc bus (DC-Link) is set up by batteries, be followed by dual mode inverter.The dual mode inverter according to
The work state information of photovoltaic plant, need to be in grid-connected switch operating and between off-network control model.By in dual mode inverter and
Communication connection is set up between photovoltaic charge controller, and charge controller power grid state information is provided by inverter.Charge controller and
Dual mode inverter is full decoupled by battery, and charge controller can be taken according to the simultaneously off-network state of dual mode inverter
Optimum control strategy stable operation, realizes the charging to batteries.In order to keep making full use of light resources when grid-connected, storing
In the case that battery is full, photovoltaic energy need to be directly incorporated into electrical network.Concrete control block diagram is as shown in Figure 2.
At present, mostly by the use of traditional Buck, Boost circuit as major loop, charge controller realizes that energy exchange can only
Depend on some IGBT in parallel and very big inductance to ensure required high current, cause very high switch in power device
Loss.Due to efficiency and switching frequency relatively low, output end just must adopt bigger inductance, cause transient response speed slack-off,
If improving response speed must just reduce inductance value, but this will produce very big output current spike.In addition, using traditional tiny stream
When current charge, quick charge, absorption charging, floating charge four-part form charging modes are controlled, need to realize between each pattern
Flexibly take over seamlessly tactful process, control relatively complicated, so in the urgent need to a kind of unified control method is realizing above-mentioned work(
Energy.
CN201310060267《A kind of charge control method of photovoltaic charge controller》According to charge mode controller
Control instruction, the mode combined using MPPT controller, storage battery pressure controller, DC current controller are realized to storing
The charge control of battery.But concrete operating principle and the mode judging method of charge mode controller is not specifically given, is caused
The work of each controller is indefinite, in addition cumbersome using three close-loop control in the control strategy.
Content of the invention
When the purpose of the present invention is the control for overcoming existing charge controller to charge battery, can not put down between multiple states
Sliding cutting is changed, and the complicated shortcoming of control strategy, proposes a kind of double -loop control side that battery is charged suitable for charge controller
Method.The present invention according to dual mode inverter off-network state and the difference of battery condition, using photovoltaic battery panel DC voltage
Outer shroud and accumulator DC pressure outer shroud take over seamlessly control method, can to greatest extent using luminous energy, control method letter
Single, flexibly switching is without impact.
Technical scheme is as follows：
Charge controller of the present invention charges to battery and adopts double loop control：Inner ring is controlled for DC current ring, outward
Ring is controlled for direct current pressure ring.Shape of the direct current pressure ring control according to simultaneously off-network state and the battery of dual mode inverter
State, selects the control of photovoltaic battery panel DC voltage outer shroud or accumulator DC pressure outer shroud control.When dual mode inverter grid-connected
Operation, or dual mode inverter off-grid operation and battery, when being in constant-current charge state, charge controller adopts light simultaneously
The control of volt cell panel DC voltage outer shroud and the mode of DC current ring control；When dual mode inverter off-grid operation and battery
When being in constant-voltage charge state, charge controller presses outer shroud control with the control of DC current ring using accumulator DC simultaneously
Mode.Two kinds of described direct current pressure rings share a set of pi regulator, the control of photovoltaic battery panel DC voltage outer shroud and battery
DC voltage outer shroud control switching constantly only switches and feedback between in the given of DC voltage, can without the need for special switchover policy
Ensure taking over seamlessly without impact for direct current pressure ring.Described charge controller reduces voltage, electricity using three staggered modulation
The ripple of stream.Control method of the present invention drastically increases the utilization rate of luminous energy, makes battery charge and is optimal, control method
Simple and flexible, fast response time.
The concrete control method of the present invention is as follows：
Charge controller adopts double loop control, inner ring to control for DC current ring, and outer shroud is controlled for direct current pressure ring.
Wherein direct current pressure ring control includes two ways：One kind is the control of photovoltaic battery panel DC voltage outer shroud, and another kind is electric power storage
Pond DC voltage outer shroud control.The selection principle of described direct current pressure ring control method is：If dual mode inverter is in
Grid-connected state, charge controller are controlled using photovoltaic cell DC voltage outer shroud；If dual mode inverter is in off-network
Running status, charged state of the charge controller according to battery select the control of photovoltaic cell DC voltage outer shroud or battery
DC voltage outer shroud is controlled.
When dual mode inverter is in grid-connected state, or dual mode inverter is in off-grid operation state and electric power storage
When pond is in constant-current charge state, charge controller is simultaneously using the control of photovoltaic battery panel DC voltage outer shroud and DC current ring
The mode of control, to ensure luminous energy peak use rate.The output of photovoltaic battery panel DC voltage outer shroud is through DC current amplitude limit
After value amplitude limit, given as DC current.
When dual mode inverter is in off-grid operation state and battery is in constant-voltage charge state, charge controller is same
The control of Shi Caiyong battery tensions outer shroud and the mode of DC current ring control.The output of accumulator DC pressure outer shroud is through straight
After the amplitude limit of stream current limit, given as DC current.
The constant-current charge state of battery includes trickle charge and onstant current voltage limiting to charge, state；The constant-voltage charge shape of battery
State includes constant-voltage charge state and loating charge constant-voltage charge state.
Direct current pressure ring described in two kinds shares a set of PI controllers.Switching between two kinds of direct current pressure rings is direct current
Voltage loop given and the switching between feedback.When photovoltaic battery panel DC voltage outer shroud is controlled, by MPPT maximum power point tracking
Magnitude of voltage after disturbance is given as DC voltage, the voltage of photovoltaic battery panel as feedback, the voltage of photovoltaic battery panel and should
Input of the error amount between DC voltage is given as pi regulator；When battery tension outer shroud is controlled, battery is permanent
Pressure charging voltage value is given as DC voltage, and the voltage of battery is given as feedback, the voltage of battery and the DC voltage
Input of the error amount between fixed as pi regulator.
According to dual mode inverter off-network state and the difference of battery tension, the given amplitude limit value of DC current is different.
When dual mode inverter is in off-grid operation state and battery tension is less than battery voltage threshold one, described cell voltage threshold
Value one is less than battery voltage threshold two, and according to battery characteristics, now the given amplitude limit value of DC current is by trickle charge amplitude limit value
Limit.When battery tension is higher than battery voltage threshold one, or dual mode inverter is operated in and during net state, and DC current is given
Fixed limit amplitude is limited by charge controller maximum charging current, and the pairs of maximum charging current values is determined by charge controller parameter itself
Fixed.
Description of the drawings
Fig. 1 charge controller entirety control block diagrams of the present invention；
Fig. 2 light stores up integral application block diagram；
Fig. 3 Battery charge controller strategic process figures.
Specific embodiment
With reference to the accompanying drawings and detailed description the present invention is described further.
As shown in figure 1, control method of the present invention is specific as follows：
The voltage of photovoltaic battery panel output, the voltage of electric current and battery, output current are respectively by charge controller direct current
The voltage sensor and current sensor of side is measured.
Charge controller adopts double loop control, inner ring to control for DC current ring, and outer shroud is controlled for direct current pressure ring.
Wherein direct current pressure ring control includes two ways：One kind is the control of photovoltaic battery panel DC voltage outer shroud, and another kind is electric power storage
Pond DC voltage outer shroud control.The selection principle of described direct current pressure ring control method is：If dual mode inverter is in
Grid-connected state, charge controller adopt photovoltaic battery panel DC voltage outer shroud control mode；If at dual mode inverter
In off-grid operation state, charged state of the charge controller according to battery, the control of photovoltaic battery panel DC voltage outer shroud is selected
Or accumulator DC pressure outer shroud control mode.
Under dual mode inverter grid-connected state, or dual mode inverter is at off-grid operation state and battery
When constant-current charge state, charge controller is simultaneously using the control of photovoltaic battery panel DC voltage outer shroud and DC current ring control
System, the given and feedback of photovoltaic battery panel DC voltage outer shroud are given by photovoltaic battery panel DC voltage outer ring controller 101.
The set-point of the DC voltage needed for the control of photovoltaic battery panel DC voltage outer shroud, mainly using maximum power point with
Track method, is realized by perturbation observation method.The principle of perturbation observation method is：According to the P-V characteristics of photovoltaic battery panel, by disturbance
Terminal voltage finding maximum power point MPP, i.e. the operational voltage value (V+ Δ V) of periodically disturbed sun energy battery, then compare
Its changed power before and after disturbing, if output power value increases, then it represents that perturbation direction is correct, (+Δ V) can disturb in the same direction
Dynamic；If output power value reduces, toward contrary (- Δ V) direction disturbance.Solar cell power output is made to become by constantly disturbance
In maximum.Photovoltaic battery panel DC voltage outer shroud controls magnitude of voltage of the required DC voltage value of feedback for photovoltaic battery panel.
When dual mode inverter off-grid operation and battery are in modified constant-voltage charge state, charge controller is adopted simultaneously
Controlled with accumulator DC pressure outer shroud control and DC current ring.
The state of the battery is according to battery characteristics and traditional four-part form charge control mode, in conjunction with battery
Current voltage value, judges the charged state residing for battery.Traditional four-part form charge control mode is divided into trickle charge, constant current limit
Pressure charges, modified constant-voltage charge, and loating charge constant-voltage charge；The corresponding different battery state of charge of different control modes：
Wherein trickle charge state and onstant current voltage limiting to charge, state, are referred to as constant-current charge state；Modified constant-voltage charge state and floating charge
Constant-voltage charge state, is referred to as constant-voltage charge state.Specific Battery charge controller strategy is as shown in Figure 3.
When battery tension is less than battery voltage threshold two, battery is in trickle charge state or onstant current voltage limiting to charge, shape
State, charge controller are controlled using the control of photovoltaic battery panel DC voltage outer shroud and DC current ring；When battery tension is higher than
Battery voltage threshold two, in modified constant-voltage charge state or loating charge constant-voltage charge state, charge controller is using storage for battery
The control of battery DC voltage outer shroud and DC current ring are controlled.The output of direct current pressure ring after the given amplitude limit of DC current,
It is re-used as the given of DC current ring.
The given amplitude limit of described DC current, also according to dual mode inverter and off-network state and battery condition not
Different together.When dual mode inverter is in off-grid operation state and battery tension is less than battery voltage threshold one, described
Battery voltage threshold one is less than battery voltage threshold two, and according to battery characteristics, now the given amplitude limit value of DC current is by trickle
Charging amplitude limit value is limited.When battery tension is higher than battery voltage threshold one, or it is operated in and net state in dual mode inverter
When, the given amplitude limit value of DC current is limited by charge controller maximum charging current, and the pairs of maximum charging current values is by control of charging
Device processed parameter itself determines.Battery voltage threshold one and battery voltage threshold two are determined by battery characteristics.
Two kinds of described direct current pressure rings share a set of PI controllers, and the switching between two kinds of direct current pressure rings is substantially
Direct current pressure ring given and the switching between feedback.When photovoltaic battery panel DC voltage outer shroud is controlled, by maximum power point
Magnitude of voltage after tracking disturbance is given as DC voltage, and the voltage of photovoltaic battery panel is used as feedback；When accumulator DC pressure
When outer shroud is controlled, battery constant-voltage charge magnitude of voltage is given as DC voltage, the voltage of battery is used as feedback.
The difference of the given and feedback of direct current pressure ring is used for the control of DC current, and pi regulator output valve is through direct current
Current limit process, obtains the set-point of DC current ringThe value of feedback of DC current ring controller 103 is three-phase reactor
The electric current of device and, then through DC current ring pi regulator, export three-phase cmpr values, then using three-phase interleaving technique,
Through PWM, the pwm control signal of charge controller main circuit IGBT switches is obtained, drives which to realize charge controller pair
Battery is charged control.
Claims (3)
1. the control method that a kind of charge controller charges to battery, described charge controller adopt double loop control：
Inner ring is controlled to the control of DC current ring, and outer shroud is controlled to direct current pressure ring control, it is characterized in that, described direct current pressure ring control
System is according to dual mode inverter and the state of off-network state and battery, selects the control of photovoltaic battery panel DC voltage outer shroud
Or accumulator DC pressure outer shroud control：
If dual mode inverter is in grid-connected state, charge controller is controlled using photovoltaic cell DC voltage outer shroud；
If dual mode inverter is in off-grid operation state, charged state of the charge controller according to battery selects photovoltaic cell
The control of plate DC voltage outer shroud or accumulator DC pressure outer shroud control；
When dual mode inverter is incorporated into the power networks, or dual mode inverter off-grid operation and battery are in constant-current charge state
When, charge controller is simultaneously by the way of the control of photovoltaic battery panel DC voltage outer shroud and the control of DC current ring；Work as bimodulus
When formula inverter off-grid operation and battery are in constant-voltage charge state, charge controller is simultaneously outer using accumulator DC pressure
Ring control and the mode of DC current ring control；Two kinds of described direct current pressure rings are controlled to a set of pi regulator, photovoltaic cell
Only in the given and feedback between of DC voltage when the control of plate DC voltage outer shroud and accumulator DC pressure outer shroud control conversion
Switching.
2. the control method that charge controller according to claim 1 charges to battery, is characterized in that, described charging
Controller judges battery according to battery characteristics and traditional four-part form charge control mode in conjunction with the current voltage of battery
Residing charged state；
When battery tension is less than battery voltage threshold two, battery is in constant-current charge state, and charge controller is to battery
Controlled using the control of photovoltaic battery panel DC voltage outer shroud and DC current ring；When battery tension is higher than battery voltage threshold
Two, battery is in constant-voltage charge state, and dual mode inverter is in off-grid operation state, and charge controller is adopted to battery
Controlled with accumulator DC pressure outer shroud control and DC current ring；The output of direct current pressure ring is through the given amplitude limit of DC current
Afterwards, it is re-used as DC current to give；
Battery tension is different with dual mode inverter off-network state, and the given amplitude limit of DC current is different：
When dual mode inverter is in off-grid operation state and battery tension is less than battery voltage threshold one, described battery electricity
Pressure threshold value one is less than battery voltage threshold two, and according to battery characteristics, now the given amplitude limit value of DC current is limited by trickle charge
Amplitude is limited；When battery tension is higher than battery voltage threshold one, or dual mode inverter is operated in and during net state, direct current
The given amplitude limit value of stream is limited by charge controller maximum charging current, and the pairs of maximum charging current values is joined by charge controller itself
Number determines.
3. the control method that charge controller according to claim 1 charges to battery, is characterized in that, two kinds of direct currents
Pressure ring is controlled：When photovoltaic battery panel direct current pressure ring is controlled
When, the magnitude of voltage after MPPT maximum power point tracking is disturbed is given as DC voltage, and the voltage of photovoltaic battery panel is used as feedback, light
Input of the error amount between volt cell plate voltage and the DC voltage are given as pi regulator；When battery tension outer shroud control
When processed, battery constant-voltage charge magnitude of voltage is given as DC voltage, the voltage of battery is used as feedback, the voltage of battery
And the DC voltage given between error amount as pi regulator input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410546641.7A CN104300579B (en) | 2014-10-15 | 2014-10-15 | The control method that a kind of charge controller charges to battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410546641.7A CN104300579B (en) | 2014-10-15 | 2014-10-15 | The control method that a kind of charge controller charges to battery |
Publications (2)
| Publication Number | Publication Date |
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| CN104300579A CN104300579A (en) | 2015-01-21 |
| CN104300579B true CN104300579B (en) | 2017-03-15 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600732B (en) * | 2015-02-16 | 2017-01-25 | 阳光电源股份有限公司 | Method and device for controlling charge and discharge of storage battery of optical storage hybrid system |
| CN111244932B (en) * | 2020-02-24 | 2021-07-06 | 国网江苏省电力有限公司 | Energy storage multi-working-condition operation control method and device for energy router |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7135836B2 (en) * | 2003-03-28 | 2006-11-14 | Power Designers, Llc | Modular and reconfigurable rapid battery charger |
| CN101969281B (en) * | 2010-10-14 | 2013-03-13 | 北京四方继保自动化股份有限公司 | Coordination control and optimization method for battery energy accumulation and photovoltaic power generation based on co-direct current bus |
| CN103762628B (en) * | 2013-12-31 | 2017-05-10 | 北京科诺伟业科技股份有限公司 | Method of controlling bidirectional converter to charge and discharge storage battery |
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