CN106100030A - Off-network type photovoltaic generating system charging management method - Google Patents
Off-network type photovoltaic generating system charging management method Download PDFInfo
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- CN106100030A CN106100030A CN201610507698.5A CN201610507698A CN106100030A CN 106100030 A CN106100030 A CN 106100030A CN 201610507698 A CN201610507698 A CN 201610507698A CN 106100030 A CN106100030 A CN 106100030A
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- 238000007726 management method Methods 0.000 title claims abstract description 23
- 238000003491 array Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000000630 rising effect Effects 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 3
- 230000005670 electromagnetic radiation Effects 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 description 4
- 230000005855 radiation Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000000284 resting 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
-
- H02J7/0086—
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Control Of Electrical Variables (AREA)
Abstract
Off-network type photovoltaic generating system charging management method, relates to photovoltaic generation, the off-network type photovoltaic generating system charging management method that a kind of caloric value is less, Charge Management precision is higher, amount of electromagnetic radiation is less in charging process.The present invention is that a photovoltaic arrays is equally divided into N number of charhing unit, each road solar cell array input by each charhing unit order access controller, form N number of charge circuit, each charge circuit is single PWM charge circuit, individually system can be charged, voltage and the current situation of accumulator monitored in real time by controller, voltage status according to accumulator controls each loop pwm power switching device execution step by step and turns off or on control so that charging voltage value dynamic equilibrium tend to a certain steady state value.The present invention is by being divided into N number of charge circuit by a photovoltaic arrays, and to reach the purpose of control accurate to charging voltage, when the quantity of loop N is the most, voltage-controlled precision is the highest.
Description
Technical field
The present invention relates to photovoltaic generation, especially a kind of caloric value is less, Charge Management precision is higher, electricity in charging process
The off-network type photovoltaic generating system charging management method that magnetic radiation amount is less.
Background technology
In off-network type photovoltaic generating system, controller is responsible for photovoltaic arrays and to accumulator charging and is supplied load equipment
Electricity.Traditional controller Charge Management mode is three kinds: 1. mode uses photovoltaic system single channel PWM to control to fill accumulator
Electricity；Mode the most then uses MPPT technique to realize accumulator charging；One photovoltaic system is the most then divided into multichannel charging single by mode
Unit, step by step switching mode realize charging accumulator.
In three of the above mode, 3. mode is the most original charging modes, and its Charge Management mode is coarse, control accuracy
Low, charge efficiency is low, and battery tension can be caused in charging process to fluctuate widely；2. mode is off-network photovoltaic system in recent years
Mainstream applications mode, which ensure that photovoltaic arrays is in maximum power point (mpp) in real time, and system effectiveness is higher；But deposit
Problem be that charging end adds DC/DC module, and a photovoltaic system uses single channel PWM to control, and causes system heat generation
Amount is very big, produces bigger electromagnetic radiation during large current charge；1. mode is the most universal occupation mode, and it is little
Power photovoltaic system is used widely, but when being used in middle high-power photovoltaic system, in single channel, electric current is very big, to control
Power device performance requirement is the highest, and producing the biggest heat in its work process needs the heat abstractor that configuration is bigger.
The problem existed based on above controller, the present invention proposes that caloric value is less, Charge Management precision is higher, charging
During the less New-type charge mode of amount of electromagnetic radiation.
Summary of the invention
The deficiency of the Charge Management mode being exactly existing off-network type photovoltaic generating system to be solved by this invention, it is provided that one
The off-network type photovoltaic generating system that kind caloric value is less, Charge Management precision is higher, amount of electromagnetic radiation is less in charging process fills
Electricity management method.
The off-network type photovoltaic generating system charging management method of the present invention, it is characterised in that this management method is by a light
Volt square formation is equally divided into N number of charhing unit, by each road solar cell array input of each charhing unit order access controller
End, forms N number of charge circuit, and each charge circuit is single PWM charge circuit, individually can be charged system, controls
Voltage and the current situation of accumulator monitored in real time by device, controls each loop pwm power switch according to the voltage status of accumulator
Device execution step by step turns off or on control so that charging voltage value dynamic equilibrium tend to a certain steady state value, control accurately
The height of accumulator charging voltage processed；Concrete control mode is as follows:
One photovoltaic arrays is divided into N number of charhing unit, N > 1, sequentially each road solar cell array input of access controller
Forming N number of charge circuit, the accumulator charging voltage now set as V, has K(1≤K≤N) individual loop is in 100% conducting
State, when, after a detection cycle T, controller finds following state when again detecting voltage and the current situation of accumulator:
(1) loop closing control is performed when storage battery is pressed with the trend of rising:
Step 1, K+1 loop is in fully on state to N power loop switching device, K power loop switching device
By PWM mode control, pulsewidth is from 100% conducting progressively to 0% conducting stepping, and step size and speed speed are according to storage battery
Pressing a liter situation judging, when the device for power switching pulsewidth modulation of loop K is 0% conducting, battery tension still has rising
Trend, then enter step 2；
Step 2, K power loop switching device enters closed mode, at the device for power switching in K+2 loop to N loop
In fully on state, K+1 power loop switching device progressively turns on stepping to 0% with PWM mode, pulsewidth from 100% conducting,
Step size and speed speed rise situation judging according to battery tension, when the device for power switching pulsewidth modulation of loop K+1
When being 0% conducting, battery tension still has the trend of rising, then enter step 3；
Step 3, repeats step 2, still has the trend of rising such as battery tension, allows the power switch device in follow-up loop the most successively
Part gradually performs above-mentioned closedown mode, until voltage progressively levels off to the device for power switching in required value or whole loops and is in pass
Closed state, i.e. charging complete state；
(2) loop unlatching control is performed when battery tension has a declining tendency:
Step 1, when battery tension is in downward trend state, when needing progressively to put into photovoltaic arrays charging, the 1st loop to the
K-2 power loop switching device is in the completely closed state, and K loop is in fully on to N power loop switching device
State, K-1 power loop switching device progressively turns on stepping, step size and speed to 100% with PWM mode, pulsewidth from 0%
Speed, according to storage battery drops situation judging, is led when the pulsewidth of the device for power switching of loop K-1 has been modulated to 100%
Logical, battery tension still has a declining tendency, then enter step 2；
Step 2, the 1st loop is in the completely closed state to K-3 power loop switching device, K-1 loop to N loop merit
Rate switching device is in fully on state, K-2 power loop switching device with PWM mode, pulsewidth from 0% progressively to 100%
Conducting stepping, step size and speed speed are according to storage battery drops situation judging, when the device for power switching of loop N-1
Being modulated to 100% conducting, battery tension still has a declining tendency, then enter step 3；
Step 3, repeats step 2, as battery tension still has a declining tendency, allows follow-up loop gradually perform the most successively above-mentioned
Open and control, until voltage progressively levels off to the PWM switching device in required value or whole loops and is in fully conducting state, enter and store
Battery fully charged state.
Storage battery is pressed with the trend of rising and battery tension and has a declining tendency constantly switching, finally makes charged electrical
Pressure value dynamic equilibrium tend to a certain steady state value, be accurately controlled the height of accumulator charging voltage.
During above-mentioned control, as some loop X breaks down, the most directly skip this loop, control X+1 loop or X-
1 loop.
The off-network type photovoltaic generating system charging management method of the present invention, by being divided into N number of charging by a photovoltaic arrays
Loop, to reach the purpose of control accurate to charging voltage, when the quantity of loop N is the most, voltage-controlled precision is also more
High.In terms of reducing heat, when system is run, when loop pwm power switching device is at off state, no current passes through back
Road, loop self will not produce heat, and when loop pwm power switching device fully conducting state, its internal resistance is the lowest, only produces
Raw less heat, certain primary Ioops when doing PWM conversion, due to the power in a certain point of loop more single pwm pattern loop or
Single MPPT control model loop is much smaller, and produced heat also reduces a lot, therefore the more original control of caloric value in charging process
Pattern will be substantially reduced, and caloric value be distributed on N number of loop, be run by N number of loop PWM in turn, beneficially power
Switching device stopping the fully heat radiation of PWM control time and resting and reorganizing, it is to avoid single device for power switching is constantly in exception
Temperature causes the lost of life.The quantity of loop N is the most, and single power loop is the least, and it is the most obvious that heat controls effect.
Simultaneously because the power in a certain point of loop more single pwm pattern loop or single MPPT control model loop are much smaller, therefore produced
The raw the most original control model of electromagnetic distu reduces a lot.Some precision instrument is conducive to reduce when using off-network photovoltaic power supply
Electromagnetic interference.The quantity of same loop N is the most, and single power loop is the least, and the amplitude of electromagnetic interference is the least.With
Time, when certain charge circuit breaks down, other loop also is able to as usual control management charging with PWM mode.Ensure that whole
Individual charging system has more preferable stability.
Accompanying drawing explanation
Fig. 1 is that the present invention manages Method And Principle block diagram.
Fig. 2 is management method control flow chart of the present invention.
Detailed description of the invention
Embodiment 1: a kind of off-network type photovoltaic generating system charging management method, this management method is by a photovoltaic arrays
It is equally divided into N number of charhing unit, by each road solar cell array input of each charhing unit order access controller, is formed
N number of charge circuit, each charge circuit is single PWM charge circuit, individually can be charged system, and controller is supervised in real time
Survey voltage and the current situation of accumulator, control each loop pwm power switching device step by step according to the voltage status of accumulator
Execution turn off or on control so that charging voltage value dynamic equilibrium tend to a certain steady state value, be accurately controlled accumulator
The height of charging voltage；Concrete control mode is as follows:
One photovoltaic arrays is divided into N number of charhing unit, N > 1, sequentially each road solar cell array input of access controller
Forming N number of charge circuit, the accumulator charging voltage now set as V, has K(1≤K≤N) individual loop is in 100% conducting
State, when, after a detection cycle T, controller finds following state when again detecting voltage and the current situation of accumulator:
(1) loop closing control is performed when storage battery is pressed with the trend of rising:
Step 1, K+1 loop is in fully on state to N power loop switching device, K power loop switching device
By PWM mode control, pulsewidth is from 100% conducting progressively to 0% conducting stepping, and step size and speed speed are according to storage battery
Pressing a liter situation judging, when the device for power switching pulsewidth modulation of loop K is 0% conducting, battery tension still has rising
Trend, then enter step 2；
Step 2, K power loop switching device enters closed mode, at the device for power switching in K+2 loop to N loop
In fully on state, K+1 power loop switching device progressively turns on stepping to 0% with PWM mode, pulsewidth from 100% conducting,
Step size and speed speed rise situation judging according to battery tension, when the device for power switching pulsewidth modulation of loop K+1
When being 0% conducting, battery tension still has the trend of rising, then enter step 3；
Step 3, repeats step 2, still has the trend of rising such as battery tension, allows the power switch device in follow-up loop the most successively
Part gradually performs above-mentioned closedown mode, until voltage progressively levels off to the device for power switching in required value or whole loops and is in pass
Closed state, i.e. charging complete state；
(2) loop unlatching control is performed when battery tension has a declining tendency:
Step 1, when battery tension is in downward trend state, when needing progressively to put into photovoltaic arrays charging, the 1st loop to the
K-2 power loop switching device is in the completely closed state, and K loop is in fully on to N power loop switching device
State, K-1 power loop switching device progressively turns on stepping, step size and speed to 100% with PWM mode, pulsewidth from 0%
Speed, according to storage battery drops situation judging, is led when the pulsewidth of the device for power switching of loop K-1 has been modulated to 100%
Logical, battery tension still has a declining tendency, then enter step 2；
Step 2, the 1st loop is in the completely closed state to K-3 power loop switching device, K-1 loop to N loop merit
Rate switching device is in fully on state, K-2 power loop switching device with PWM mode, pulsewidth from 0% progressively to 100%
Conducting stepping, step size and speed speed are according to storage battery drops situation judging, when the device for power switching of loop N-1
Being modulated to 100% conducting, battery tension still has a declining tendency, then enter step 3；
Step 3, repeats step 2, as battery tension still has a declining tendency, allows follow-up loop gradually perform the most successively above-mentioned
Open and control, until voltage progressively levels off to the PWM switching device in required value or whole loops and is in fully conducting state, enter and store
Battery fully charged state.
Storage battery is pressed with the trend of rising and battery tension and has a declining tendency constantly switching, finally makes charged electrical
Pressure value dynamic equilibrium tend to a certain steady state value, be accurately controlled the height of accumulator charging voltage.
During above-mentioned control, as some loop X breaks down, the most directly skip this loop, control X+1 loop or X-
1 loop.
Such as 1 12V off-network photovoltaic power supply system, use 12V lead-acid battery, photovoltaic arrays is divided into 6 charge circuits connect
Entering system, accumulator charging voltage is 13.5V.During system is properly functioning, battery tension and electric current are monitored by controller,
When finding battery tension:
(1) loop closing control is performed time on the rise compared with 13.5V:
The device for power switching allowing each loop successively gradually performs PWM and controls closedown mode, until voltage progressively levels off to requirement
The device for power switching in value or all loop is closed (i.e. charging complete state).
(2) relatively 13.5V performs loop when having downward trend and opens control
Allow follow-up loop gradually perform PWM successively control to open and control, until voltage progressively levels off to required value or whole loops
PWM switching device be in fully conducting state, enter accumulator fully charged state.
Storage battery is pressed with the trend of rising and battery tension and has a declining tendency constantly switching, finally makes charged electrical
Pressure value dynamic equilibrium level off to 13.5V, be accurately controlled the height of accumulator charging voltage.
Claims (2)
1. an off-network type photovoltaic generating system charging management method, it is characterised in that this management method is by a photovoltaic arrays
It is equally divided into N number of charhing unit, by each road solar cell array input of each charhing unit order access controller, is formed
N number of charge circuit, each charge circuit is single PWM charge circuit, individually can be charged system, and controller is supervised in real time
Survey voltage and the current situation of accumulator, control each loop pwm power switching device step by step according to the voltage status of accumulator
Execution turn off or on control so that charging voltage value dynamic equilibrium tend to a certain steady state value, be accurately controlled accumulator
The height of charging voltage；Concrete control mode is as follows:
One photovoltaic arrays is divided into N number of charhing unit, N > 1, sequentially each road solar cell array input of access controller
Forming N number of charge circuit, the accumulator charging voltage now set as V, has K(1≤K≤N) individual loop is in 100% conducting
State, when, after a detection cycle T, controller finds following state when again detecting voltage and the current situation of accumulator:
(1) loop closing control is performed when storage battery is pressed with the trend of rising:
Step 1, K+1 loop is in fully on state to N power loop switching device, K power loop switching device
By PWM mode control, pulsewidth is from 100% conducting progressively to 0% conducting stepping, and step size and speed speed are according to storage battery
Pressing a liter situation judging, when the device for power switching pulsewidth modulation of loop K is 0% conducting, battery tension still has rising
Trend, then enter step 2；
Step 2, K power loop switching device enters closed mode, at the device for power switching in K+2 loop to N loop
In fully on state, K+1 power loop switching device progressively turns on stepping to 0% with PWM mode, pulsewidth from 100% conducting,
Step size and speed speed rise situation judging according to battery tension, when the device for power switching pulsewidth modulation of loop K+1
When being 0% conducting, battery tension still has the trend of rising, then enter step 3；
Step 3, repeats step 2, still has the trend of rising such as battery tension, allows the power switch device in follow-up loop the most successively
Part gradually performs above-mentioned closedown mode, until voltage progressively levels off to the device for power switching in required value or whole loops and is in pass
Closed state (i.e. charging complete state)；
(2) loop unlatching control is performed when battery tension has a declining tendency:
Step 1, when battery tension is in downward trend state, when needing progressively to put into photovoltaic arrays charging, the 1st loop to the
K-2 power loop switching device is in the completely closed state, and K loop is in fully on to N power loop switching device
State, K-1 power loop switching device progressively turns on stepping, step size and speed to 100% with PWM mode, pulsewidth from 0%
Speed, according to storage battery drops situation judging, is led when the pulsewidth of the device for power switching of loop K-1 has been modulated to 100%
Logical, battery tension still has a declining tendency, then enter step 2；
Step 2, the 1st loop is in the completely closed state to K-3 power loop switching device, K-1 loop to N loop merit
Rate switching device is in fully on state, K-2 power loop switching device with PWM mode, pulsewidth from 0% progressively to 100%
Conducting stepping, step size and speed speed are according to storage battery drops situation judging, when the device for power switching of loop N-1
Being modulated to 100% conducting, battery tension still has a declining tendency, then enter step 3；
Step 3, repeats step 2, as battery tension still has a declining tendency, allows follow-up loop gradually perform the most successively above-mentioned
Open and control, until voltage progressively levels off to the PWM switching device in required value or whole loops and is in fully conducting state, enter and store
Battery fully charged state.
2. off-network type photovoltaic generating system charging management method as claimed in claim 1, it is characterised in that above-mentioned control process
In, as some loop X breaks down, the most directly skip this loop, control X+1 loop or X-1 loop.
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| CN101146394A (en) * | 2007-08-02 | 2008-03-19 | 安研 | Optical road lamp load control device |
| CN101404416A (en) * | 2008-11-04 | 2009-04-08 | 合肥阳光电源有限公司 | Solar storage battery charge controller and its control method |
| CN103036281A (en) * | 2012-12-05 | 2013-04-10 | 合肥工业大学 | High-power photovoltaic charging system and main circuit of high-power photovoltaic charging system and control method of main circuit of high-power photovoltaic charging system |
| US20130249296A1 (en) * | 2012-03-22 | 2013-09-26 | Chung Yuan Christian University | Photovoltaic System Having Power-Increment-Aided Incremental-Conductance Maximum Power Point Tracking Controller Using Constant-Frequency and Variable-Duty Control and Method Thereof |
| CN105375518A (en) * | 2015-11-17 | 2016-03-02 | 中国科学院广州能源研究所 | Fuzzy control method and system for photovoltaic maximum power point tracking (MPPT) |
-
2016
- 2016-07-01 CN CN201610507698.5A patent/CN106100030B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101146394A (en) * | 2007-08-02 | 2008-03-19 | 安研 | Optical road lamp load control device |
| CN101404416A (en) * | 2008-11-04 | 2009-04-08 | 合肥阳光电源有限公司 | Solar storage battery charge controller and its control method |
| US20130249296A1 (en) * | 2012-03-22 | 2013-09-26 | Chung Yuan Christian University | Photovoltaic System Having Power-Increment-Aided Incremental-Conductance Maximum Power Point Tracking Controller Using Constant-Frequency and Variable-Duty Control and Method Thereof |
| CN103036281A (en) * | 2012-12-05 | 2013-04-10 | 合肥工业大学 | High-power photovoltaic charging system and main circuit of high-power photovoltaic charging system and control method of main circuit of high-power photovoltaic charging system |
| CN105375518A (en) * | 2015-11-17 | 2016-03-02 | 中国科学院广州能源研究所 | Fuzzy control method and system for photovoltaic maximum power point tracking (MPPT) |
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Effective date of registration: 20210602 Address after: 650106 2nd floor, block C, No. 999, Kegao Road, high tech Zone, Kunming City, Yunnan Province Patentee after: Yunnan sangwang New Energy Investment Development Co.,Ltd. Address before: 2 / F, block C, Sunshine Building, 999 Kegao Road, high tech Zone, Kunming, Yunnan 650106 Patentee before: YUNNAN TUORI SCIENCE & TECHNOLOGY Co.,Ltd. |