CN110445145A - Control method and device, the photovoltaic apparatus system of plant capacity - Google Patents
Control method and device, the photovoltaic apparatus system of plant capacity Download PDFInfo
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- CN110445145A CN110445145A CN201910790838.8A CN201910790838A CN110445145A CN 110445145 A CN110445145 A CN 110445145A CN 201910790838 A CN201910790838 A CN 201910790838A CN 110445145 A CN110445145 A CN 110445145A
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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
- H02J3/02—Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
Abstract
The present invention provides a kind of control method and device of plant capacity, photovoltaic apparatus system, wherein, this method comprises: the operating mode of detection photovoltaic apparatus, wherein the photovoltaic apparatus is respectively connected to photovoltaic DC power supply and AC network with AC module is exchanged by direct current DC module；The status information of the DC module and the AC module is obtained according to the operation mode；The realtime power of the photovoltaic DC power supply is controlled according to the state information.Through the invention, it solves the technical issues of photovoltaic apparatus fluctuation of service in the related technology, guarantees the continual and steady operation of equipment, extend the service life of photovoltaic apparatus.
Description
Technical field
The present invention relates to energy control fields, control method and device, photovoltaic in particular to a kind of plant capacity
Device systems.
Background technique
In the related technology, countries in the world all start that photovoltaic power generation is widely applied to alleviate power grid pressure and utilize light in recent years
Volt generates electricity to solve the power demand of no grid coverage area.At the same time, as the development living standards of the people of society obtain
It is obviously improved, the accounting of air conditioning energy consumption is soaring up to 50~60% in building energy consumption therewith；And it is arrived used in PV air-conditioner system
Electric energy both from the sun and to environment there is no any pollution and by public concern and research.
Since machine is mounted in outdoor outside PV air-conditioner, and under hot soak condition, when unit for a long time at full capacity
It is excessive if there is ac-side current or exchange side form block, DC side module temperature is excessively high or when overload operation, it may
Due at full capacity or overwork cause module temperature is excessively high to cause system unstable, working under long term high temperature leads to the product longevity
Life reduces, decrease of power generation or system-down problem caused by system trigger overheat protector.
For the above problem present in the relevant technologies, at present it is not yet found that the solution of effect.
Summary of the invention
The embodiment of the invention provides a kind of control method and device of plant capacity, photovoltaic apparatus system.
According to one embodiment of present invention, a kind of control method of plant capacity is provided, comprising: detection photovoltaic apparatus
Operating mode, wherein the photovoltaic apparatus by direct current DC module with exchange AC module be respectively connected to photovoltaic DC power supply and
AC network；The status information of the DC module and the AC module is obtained according to the operation mode；Believed according to the state
Breath controls the realtime power of the photovoltaic DC power supply.
Optionally, the operating mode includes power generation mode and with power mode, and the operating mode for detecting photovoltaic apparatus includes:
Detect the electric energy transmission direction between the AC network and the photovoltaic apparatus；In the photovoltaic apparatus to the AC network
When power generation, determine that the operating mode is power generation mode；When the AC network is powered to the photovoltaic apparatus, described in determination
Operating mode is to use power mode.
Optionally, the status information for obtaining the DC module and the AC module according to the operation mode includes: in institute
When to state operating mode be power generation mode, detect the first temperature value of the AC module, the second temperature value of the detection DC module,
Detect the first current value of the AC module；When the operating mode is with power mode, the first temperature of the AC module is detected
The second temperature value of angle value, the detection DC module.
Optionally, when the operating mode is power generation mode, the photovoltaic DC electricity is controlled according to the state information
The realtime power in source includes: to judge whether first temperature value is greater than the first temperature threshold, judges that the second temperature value is
It is no to be greater than second temperature thresholding, and judge whether first current value is greater than the first threshold；Meeting the following conditions
At least one when: first temperature value is greater than the first temperature threshold, the second temperature value is greater than second temperature thresholding, described
First current value is greater than the first threshold, limits the maximum power-adjustable of the photovoltaic DC power supply.
Optionally, after the maximum power-adjustable for limiting the photovoltaic DC power supply, the method also includes: judge institute
State whether the first temperature value is less than third temperature threshold, judge the second temperature value whether less than the 4th temperature threshold, and
Judge first current value whether less than the second threshold；When meeting the following conditions: first temperature value is less than
Three temperature thresholds, the second temperature value, less than the second threshold, are released less than the 4th temperature threshold, first current value
Limit the maximum power-adjustable of the photovoltaic DC power supply；When meeting at least one the following conditions: first temperature value is not
Less than third temperature threshold, the second temperature value not less than the 4th temperature threshold, first current value not less than the second electricity
Thresholding is flowed, the maximum power-adjustable for limiting the photovoltaic DC power supply is kept.
Optionally, when the operating mode is power generation mode, the photovoltaic DC electricity is controlled according to the state information
The realtime power in source includes: to judge whether first temperature value is greater than the 5th temperature threshold, judges that the second temperature value is
It is no to be greater than the 6th temperature threshold, and judge whether first current value is greater than third threshold；Meeting the following conditions
At least one when: first temperature value is greater than the 5th temperature threshold, the second temperature value is greater than the 6th temperature threshold, described
First current value is greater than third threshold, and the realtime power of the photovoltaic DC power supply is reduced according to preset step-length.
Optionally, after the realtime power for reducing the photovoltaic DC power supply according to preset step-length, the method is also wrapped
It includes: judging that first temperature value whether less than the 7th temperature threshold, judges the second temperature value whether less than the 8th temperature
Thresholding, and judge first current value whether less than the 4th threshold；When meeting the following conditions: first temperature
Value is less than the 7th temperature threshold, and the second temperature value is less than the 8th temperature threshold, and first current value is less than the 4th electric current
Thresholding stops the realtime power for reducing the photovoltaic DC power supply；When meeting at least one the following conditions: first temperature
Value is not less than the 7th temperature threshold, and the second temperature value is not less than the 8th temperature threshold, and first current value is not less than the
Four thresholds continue the realtime power that the photovoltaic DC power supply is reduced according to preset step-length.
Optionally, when the operating mode is with power mode, the photovoltaic DC electricity is controlled according to the state information
The realtime power in source includes: to judge that first temperature value is greater than the first temperature threshold, judges that the second temperature value is greater than the
Two temperature thresholds；When meeting at least one the following conditions: first temperature value is greater than the first temperature threshold, second temperature
Angle value is greater than second temperature thresholding, first current value is greater than the first threshold, limits the photovoltaic DC power supply most
Big power-adjustable.
Optionally, after the maximum power-adjustable for limiting the photovoltaic DC power supply, the method also includes: judge institute
The first temperature value is stated less than third temperature threshold, and judges the second temperature value less than the 4th temperature threshold；Meet with
When lower condition: first temperature value is less than third temperature threshold, the second temperature value less than the 4th temperature threshold, releases limit
Make the maximum power-adjustable of the photovoltaic DC power supply；When meeting at least one the following conditions: first temperature value is not small
It is not less than the 4th temperature threshold in third temperature threshold, the second temperature value, keeps limiting the photovoltaic DC power supply most
Big power-adjustable.
According to another embodiment of the invention, a kind of control device of plant capacity is provided, comprising: detection module,
For detecting the operating mode of photovoltaic apparatus, wherein the photovoltaic apparatus is connect by direct current DC module with AC module is exchanged respectively
Enter photovoltaic DC power supply and AC network；Module is obtained, for obtaining the DC module and the AC according to the operation mode
The status information of module；Control module, for controlling the realtime power of the photovoltaic DC power supply according to the state information.
Optionally, the operating mode includes power generation mode and with power mode, and the detection module includes: detection unit,
For detecting the electric energy transmission direction between the AC network and the photovoltaic apparatus；Determination unit, in the photovoltaic
When equipment generates electricity to the AC network, determine that the operating mode is power generation mode；In the AC network to the photovoltaic
When equipment is powered, determine that the operating mode is to use power mode.
Optionally, the acquisition module includes: first acquisition unit, is used for when the operating mode is power generation mode,
Detect the first electricity of the first temperature value of the AC module, the second temperature value of the detection DC module, the detection AC module
Flow valuve；Second acquisition unit, for the operating mode be with power mode when, detect the AC module the first temperature value,
Detect the second temperature value of the DC module.
Optionally, when the operating mode is power generation mode, the control module includes: the first judging unit, is used for
Judge whether first temperature value is greater than the first temperature threshold, judges whether the second temperature value is greater than second temperature door
Limit, and judge whether first current value is greater than the first threshold；Limiting unit, for meeting the following conditions at least
For the moment: first temperature value is greater than the first temperature threshold, the second temperature value is greater than second temperature thresholding, described first
Current value is greater than the first threshold, limits the maximum power-adjustable of the photovoltaic DC power supply.
Optionally, the control module further include: second judgment unit, for limiting the photovoltaic in the limiting unit
After the maximum power-adjustable of DC power supply, judge whether first temperature value is less than third temperature threshold, judges described
Whether whether two temperature values are less than the 4th temperature threshold, and judge first current value less than the second threshold；First
Control unit, for when meeting the following conditions: it is small that first temperature value is less than third temperature threshold, the second temperature value
In the 4th temperature threshold, first current value less than the second threshold, the maximum for the photovoltaic DC power supply that lifts restrictions
Power-adjustable；When meeting at least one the following conditions: first temperature value is not less than third temperature threshold, second temperature
Angle value is not less than the second threshold not less than the 4th temperature threshold, first current value, keeps limiting the photovoltaic DC
The maximum power-adjustable of power supply.
Optionally, when the operating mode is power generation mode, the control module includes: third judging unit, is used for
Judge whether first temperature value is greater than the 5th temperature threshold, judges whether the second temperature value is greater than the 6th temperature door
Limit, and judge whether first current value is greater than third threshold；Adjustment unit, for meeting the following conditions at least
For the moment: first temperature value is greater than the 5th temperature threshold, the second temperature value is greater than the 6th temperature threshold, described first
Current value is greater than third threshold, and the realtime power of the photovoltaic DC power supply is reduced according to preset step-length.
Optionally, the control module further include: the 4th judging unit is used in the adjustment unit according to preset step-length
After the realtime power for reducing the photovoltaic DC power supply, judge that first temperature value whether less than the 7th temperature threshold, is sentenced
Whether the second temperature value break less than the 8th temperature threshold, and judges first current value whether less than the 4th electric current door
Limit；Second control unit, for when meeting the following conditions: first temperature value is less than the 7th temperature threshold, and described second
Less than the 8th temperature threshold, first current value stops reducing the photovoltaic DC electricity temperature value less than the 4th threshold
The realtime power in source；When meeting at least one the following conditions: first temperature value is not less than the 7th temperature threshold, and described the
Two temperature values are not less than the 8th temperature threshold, and first current value is not less than the 4th threshold, continue according to preset step-length
Reduce the realtime power of the photovoltaic DC power supply.
Optionally, when the operating mode is with power mode, the control module includes: the 5th judging unit, is used for
Judge that first temperature value is greater than the first temperature threshold, judges that the second temperature value is greater than second temperature thresholding；Third control
Unit processed, for when meeting at least one the following conditions: first temperature value is greater than the first temperature threshold, second temperature
Angle value is greater than second temperature thresholding, first current value is greater than the first threshold, limits the photovoltaic DC power supply most
Big power-adjustable.
Optionally, the control module further include: the 6th judging unit, described in being limited in the third control unit
After the maximum power-adjustable of photovoltaic DC power supply, judge that first temperature value is less than third temperature threshold, and judge institute
Second temperature value is stated less than the 4th temperature threshold；4th control unit, for when meeting the following conditions: first temperature value
Less than third temperature threshold, the second temperature value less than the 4th temperature threshold, the photovoltaic DC power supply is lifted restrictions most
Big power-adjustable；When meeting at least one the following conditions: first temperature value is not less than third temperature threshold, described second
Temperature value is not less than the 4th temperature threshold, keeps the maximum power-adjustable for limiting the photovoltaic DC power supply.
According to another embodiment of the invention, a kind of photovoltaic apparatus system is provided, which includes at least: photovoltaic is straight
Galvanic electricity source, AC network, photovoltaic apparatus, the photovoltaic apparatus are respectively connected to the light with AC module is exchanged by direct current DC module
Lie prostrate DC power supply and the AC network, wherein the photovoltaic apparatus includes device described in embodiment as above.
According to still another embodiment of the invention, a kind of storage medium is additionally provided, meter is stored in the storage medium
Calculation machine program, wherein the computer program is arranged to execute the step in any of the above-described embodiment of the method when operation.
According to still another embodiment of the invention, a kind of electronic device, including memory and processor are additionally provided, it is described
Computer program is stored in memory, the processor is arranged to run the computer program to execute any of the above-described
Step in embodiment of the method.
Through the invention, the operating mode of photovoltaic apparatus is detected, then obtains the DC module according to the operation mode
With the status information of the AC module, the realtime power of the photovoltaic DC power supply is finally controlled according to the state information, is led to
Control generated output is crossed to reduce the operating pressure of AC module and DC Module, reduces AC module and DC Module temperature,
It solves the technical issues of photovoltaic apparatus fluctuation of service in the related technology, guarantees the continual and steady operation of equipment, extend light
Lie prostrate the service life of equipment.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is a kind of structural block diagram of the control air-conditioning of plant capacity of the embodiment of the present invention；
Fig. 2 is a kind of control method flow chart of plant capacity according to an embodiment of the present invention；
Fig. 3 is the PV air-conditioner system block diagram of the embodiment of the present invention；
Fig. 4 is PV air-conditioner power generation mode power limit/reduction control logic block diagram of the embodiment of the present invention；
Fig. 5 is that the PV air-conditioner electricity consumption mode power of the embodiment of the present invention limits/reduce control logic block diagram；
Fig. 6 is a kind of structural block diagram of the control device of plant capacity of the embodiment of the present invention；
Fig. 7 is a kind of system connection figure of photovoltaic apparatus system of the embodiment of the present invention.
Specific embodiment
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and in combination with Examples.It should be noted that not conflicting
In the case of, the features in the embodiments and the embodiments of the present application can be combined with each other.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.
Embodiment 1
Embodiment of the method provided by the embodiment of the present application one can be in computer, controlling terminal, control device, air-conditioning etc.
It is executed in similar arithmetic unit.For operating on air-conditioning, Fig. 1 is a kind of control of plant capacity of the embodiment of the present invention
The structural block diagram of air-conditioning, as shown in Figure 1, computer 10 may include one or more (only showing one in Fig. 1) processors 102
It (processing unit that processor 102 can include but is not limited to Micro-processor MCV or programmable logic device FPGA etc.) and is used for
The memory 104 of storing data, optionally, above-mentioned computer can also include for communication function transmission device 106 and
Input-output equipment 108.It will appreciated by the skilled person that structure shown in FIG. 1 is only to illustrate, not to above-mentioned
The structure of computer causes to limit.For example, computer 10 may also include than shown in Fig. 1 more perhaps less component or
With the configuration different from shown in Fig. 1.
Memory 104 can be used for storing computer program, for example, the software program and module of application software, such as this hair
The corresponding computer program of control control method of one of bright embodiment plant capacity, processor 102 pass through operation storage
Computer program in memory 104 realizes above-mentioned method thereby executing various function application and data processing.
Memory 104 may include high speed random access memory, may also include nonvolatile memory, as one or more magnetic storage fills
It sets, flash memory or other non-volatile solid state memories.In some instances, memory 104 can further comprise relative to place
The remotely located memory of device 102 is managed, these remote memories can pass through network connection to computer 10.The reality of above-mentioned network
Example includes but is not limited to internet, intranet, local area network, mobile radio communication and combinations thereof.
Transmitting device 106 is used to that data to be received or sent via a network.Above-mentioned network specific example may include
The wireless network that the communication providers of computer 10 provide.In an example, transmitting device 106 includes a network adapter
(Network Interface Controller, referred to as NIC), can be connected by base station with other network equipments so as to
It is communicated with internet.In an example, transmitting device 106 can be radio frequency (Radio Frequency, referred to as RF)
Module is used to wirelessly be communicated with internet.
A kind of control method of plant capacity is provided in the present embodiment, and Fig. 2 is one kind according to an embodiment of the present invention
The control method flow chart of plant capacity, as shown in Fig. 2, the process includes the following steps:
Step S202 detects the operating mode of photovoltaic apparatus, wherein photovoltaic apparatus by direct current DC module with exchange AC mould
Block is respectively connected to photovoltaic DC power supply and AC network；
In the present embodiment, the AC network of photovoltaic DC power supply and alternating current including photovoltaic module all connects with photovoltaic apparatus
Connect, photovoltaic DC power supply other than powering to photovoltaic apparatus, can also according to its generated energy and equipment electricity consumption storage or
It is to grid power transmission.
AC module is corresponding with alternating current net side, including DCAC (direct current delivers stream) circuit is electric with ACDC (exchange and turn direct current)
Road, DC module is corresponding with photovoltaic DC source side, including DCDC (conversion of direct current high-low pressure) circuit.
Step S204 obtains the status information of DC module and AC module according to operating mode；
Step S206 controls the realtime power of photovoltaic DC power supply according to status information.The real-time function of photovoltaic DC power supply
The realtime power of rate, that is, real-time generated output.
Through the above steps, the operating mode of photovoltaic apparatus is detected, then obtains the DC mould according to the operation mode
The status information of block and the AC module finally controls the realtime power of the photovoltaic DC power supply according to the state information,
Reduce the operating pressure of AC module and DC Module by control generated output, reduces AC module and DC Module temperature
Degree, solves the technical issues of photovoltaic apparatus fluctuation of service in the related technology, guarantees the continual and steady operation of equipment, extend
The service life of photovoltaic apparatus.
Optionally, the status information of the present embodiment is used to characterize the working condition of DC module and AC module.Including temperature, electricity
Stream etc..Photovoltaic apparatus is the electrical equipment for accessing photovoltaic electrification component, and such as air-conditioning, washing machine, refrigerator, television set etc. can also be with
Using all devices set of electricity consumption side as photovoltaic apparatus.
The present embodiment is illustrated so that photovoltaic apparatus is air-conditioning as an example, and Fig. 3 is the PV air-conditioner system of the embodiment of the present invention
Block diagram, air-conditioning include interior machine and outer machine, wherein bold portion is power line, and dotted portion is communication line, and outdoor machine of air-conditioner can be excellent
First from photovoltaic electricity side-draw, the use of air-conditioning can not be influenced from AC network electricity side-draw when photovoltaic side does not generate electricity.
In the embodiment of the present embodiment, operating mode includes power generation mode and with power mode, wherein power generation mode
Under, pure photovoltaic power generation, air-conditioning does not work or photovoltaic power generation quantity is greater than air conditioning electricity consumption, and under power mode, AC network is to photovoltaic
Air-conditioning power supply.The operating mode of detection photovoltaic apparatus includes: the electric energy detected between the AC network and the photovoltaic apparatus
Transmission direction；When the photovoltaic apparatus generates electricity to the AC network, determine that the operating mode is power generation mode；Described
When AC network is powered to the photovoltaic apparatus, determine that the operating mode is to use power mode.
In the present embodiment, obtaining the status information of DC module and AC module according to operating mode includes: in operating mode
When for power generation mode, the first temperature value for detecting AC module, the second temperature value for detecting DC module, the first electricity for detecting AC module
Flow valuve；When operating mode is with power mode, detects the first temperature value of AC module, detects the second temperature value of DC module.
In power control, realtime power can be controlled by limit power and drop power, limitation power limits real-time
Power such as keeps not can increase currently no more than some value, and drop power refers to power on the basis of current power by certain step
Long decline.In control, the control module of air-conditioning is indicated by the way that corresponding flag bit is arranged.
The present embodiment is illustrated by implement scene of operating mode, and every kind of implement scene includes drop power and limit power again
Two processes are triggered according to different status thresholds respectively.
It when operating mode is power generation mode, limits in power flow, the reality of photovoltaic DC power supply is controlled according to status information
When power include:
S11, judges whether the first temperature value is greater than the first temperature threshold, judges whether second temperature value is greater than second temperature
Thresholding, and judge whether the first current value is greater than the first threshold；
S12, when meeting at least one the following conditions: it is big that the first temperature value is greater than the first temperature threshold, second temperature value
It is greater than the first threshold in second temperature thresholding, the first current value, limits the maximum power-adjustable of photovoltaic DC power supply.It can be with
Current power is set by maximum power-adjustable, i.e., the generated output of photovoltaic module is not allowed to be greater than current power.
Optionally, after the maximum power-adjustable of limitation photovoltaic DC power supply, further includes:
Whether S13, judges whether the first temperature value is less than third temperature threshold, judge second temperature value less than the 4th temperature
Thresholding, and judge the first current value whether less than the second threshold；
S14, when meeting the following conditions: the first temperature value is less than third temperature threshold, second temperature value less than the 4th temperature
Thresholding, the first current value are spent less than the second threshold, the maximum power-adjustable for the photovoltaic DC power supply that lifts restrictions；Meet with
When at least one lower condition: the first temperature value is not less than third temperature threshold, second temperature value not less than the 4th temperature threshold, the
One current value is not less than the second threshold, keeps the maximum power-adjustable of limitation photovoltaic DC power supply.
It when operating mode is power generation mode, drops in power flow, the real-time of photovoltaic DC power supply is controlled according to status information
Power includes:
S21, judges whether the first temperature value is greater than the 5th temperature threshold, judges whether second temperature value is greater than the 6th temperature
Thresholding, and judge whether the first current value is greater than third threshold；
S22, when meeting at least one the following conditions: it is big that the first temperature value is greater than the 5th temperature threshold, second temperature value
It is greater than third threshold in the 6th temperature threshold, the first current value, reduces the real-time of photovoltaic DC power supply according to preset step-length
Power.
Optionally, after the realtime power for reducing photovoltaic DC power supply according to preset step-length, further includes:
S23 judges that the first temperature value whether less than the 7th temperature threshold, judges second temperature value whether less than the 8th temperature
Thresholding, and judge the first current value whether less than the 4th threshold；
S24, when meeting the following conditions: the first temperature value is less than the 7th temperature threshold, and second temperature value is less than the 8th temperature
Thresholding is spent, the first current value stops the realtime power for reducing photovoltaic DC power supply less than the 4th threshold；Meeting following item
When at least one part: the first temperature value is not less than the 7th temperature threshold, and second temperature value is not less than the 8th temperature threshold, the first electricity
Flow valuve is not less than the 4th threshold, continues the realtime power that photovoltaic DC power supply is reduced according to preset step-length.
Fig. 4 is PV air-conditioner power generation mode power limit/reduction control logic block diagram of the embodiment of the present invention, including multiple
Flow chart branches, wherein drop power and limit power flow chart branches be it is arranged side by side, in figure, AC side form deblocking temperature 1 refer to exchange side form block
A certain desired temperature (the first temperature threshold), DC side form deblocking temperature 1 refer to exchange side form block a certain desired temperature (second
Temperature threshold), exchange side form deblocking temperature setting value can be identical with DC side module temperature setting value, can also be different.The side AC
Current limit 10 refers to exchange side (power generation/electricity consumption) a certain current setting value (the first threshold).AC side form deblocking temperature 2 refers to exchange
The a certain desired temperature (third temperature threshold) of side form block.DC side form deblocking temperature 2 refers to a certain temperature setting of exchange side form block
It is worth (the 4th temperature threshold), exchange side form deblocking temperature setting value can be identical with DC side module temperature setting value, can also not
Together.The side AC current limit 11 refers to exchange side (power generation/electricity consumption) a certain current setting value (the second threshold).It is said below
It is bright, comprising:
1., when PV air-conditioner current state is generating state (i.e. power generation mode), drop power and limit power flag bit are silent
Think 0, PV air-conditioner operates normally at this time；When detecting that exchange surveys module temperature more than a certain limit value, such as more than 105 DEG C
When, limit power flag bit is 1, and it is current power that PV air-conditioner system photovoltaic side is power limited at this time, does not allow to increase power；When
When detecting that direct current surveys module temperature and is more than a certain limit value, such as when more than 105 DEG C, limit power flag bit is 1, and photovoltaic is empty at this time
Power limited adjusting system photovoltaic side is current power, does not allow to increase power.It is more than a certain limit value when detecting that electric current is surveyed in exchange
When, such as when more than 28A, limit power flag bit is 1, it is current power that PV air-conditioner system photovoltaic side is power limited at this time, no
Allow to increase power.
2., when limit power flag bit be 1 when, detection exchange survey module temperature, DC side module temperature and exchange survey electric current
When whether being lower than a certain limit value, such as exchanging side form deblocking temperature not less than 100 DEG C, limit power flag bit is still 1, DC side module
When temperature is not less than 100 DEG C, limit power flag bit is still 1, and when ac-side current is not less than 20A, limit power flag bit is still 1,
Only when module is surveyed in exchange and DC side module temperature is both less than a certain limit value (such as 100 DEG C) and ac-side current is less than a certain
When setting value (20A), limit power condition flag bit is 0, and PV air-conditioner system operates normally, and reruns 1. logic.
3., when detecting that exchange surveys module temperature and is more than a certain limit value, such as when more than 110 DEG C, power flag bit drops
It is 1, PV air-conditioner system photovoltaic side power is declined by the power of a fixed step size (such as 50W/s) at this time；When detect direct current survey
When module temperature is more than a certain limit value, such as when more than 110 DEG C, drop power flag bit is 1, at this time PV air-conditioner system photovoltaic side
Power is declined by the power of a fixed step size (such as 50W/s)；When detecting that exchange surveys electric current more than a certain limit value, such as more than
When 30A, drop power flag bit is 1, and PV air-conditioner system photovoltaic side power is by under the power of a fixed step size (such as 50W/s) at this time
Drop.
4., when drop power flag bit be 1 when, detection exchange survey module temperature, DC side module temperature and exchange survey electric current
When whether being lower than a certain limit value, such as exchanging side form deblocking temperature not less than 109.5 DEG C, drop power flag bit is still 1, direct current side form
When deblocking temperature is not less than 109.5 DEG C, drop power flag bit is still 1, and when ac-side current is not less than 25A, limit power flag bit is still
It is 1, only when module is surveyed in exchange and DC side module temperature is both less than a certain limit value (such as 109.5 DEG C) and ac-side current is small
When a certain setting value (25A), drop power condition flag bit is 0, reruns 3. logic.
When dropping power flag bit is 0, when limit power flag bit is 0, air-conditioning is operated normally；It is 1 when limiting power flag bit,
It is preferential by drop logical power operation when drop power flag bit is also 1；When drop power flag bit is 0, and limit power flag bit is 1,
By limit logical power operation.
The means for taking power limitation should be first limited when power, which reaches, may influence the stable degree of system, when by power
It is limited to current value, drop power means should be taken when system degree of stability continues to be affected, therefore drop the module of power setting
Temperature limit and ac-side current limit value should be greater than the module temperature of limit power setting and exchange survey current limit.
In another implement scene, when operating mode is with power mode, same includes power two streams of drop power and limit
Journey is triggered according to different status thresholds respectively.It limits in power flow, the real-time of photovoltaic DC power supply is controlled according to status information
Power includes:
S31 judges that the first temperature value is greater than the first temperature threshold, judges that second temperature value is greater than second temperature thresholding；
S32, when meeting at least one the following conditions: it is big that the first temperature value is greater than the first temperature threshold, second temperature value
It is greater than the first threshold in second temperature thresholding, the first current value, limits the maximum power-adjustable of photovoltaic DC power supply.
Optionally, after the maximum power-adjustable of limitation photovoltaic DC power supply, method further include:
S33 judges that the first temperature value is less than third temperature threshold, and judges second temperature value less than the 4th temperature door
Limit；
S34, when meeting the following conditions: the first temperature value is less than third temperature threshold, second temperature value less than the 4th temperature
Spend thresholding, the maximum power-adjustable for the photovoltaic DC power supply that lifts restrictions；When meeting at least one the following conditions: the first temperature value
It is not less than the 4th temperature threshold not less than third temperature threshold, second temperature value, keeps the maximum of limitation photovoltaic DC power supply can
Adjusting power.
Fig. 5 is that the PV air-conditioner electricity consumption mode power of the embodiment of the present invention limits/reduce control logic block diagram, executes process
It is similar with Fig. 4, since under power mode, AC electric current is stablized, and photovoltaic side does not generate electricity to grid side, may not need with reference to exchange side electricity
Stream does not have to the detection side AC electric current.
Using the scheme of the present embodiment, in the operation of PV air-conditioner system, if there is alternating current is excessive or exchange
Side form block, DC side module temperature are excessively high, will exchange side form block and direct current side form by reducing with generated output is limited to reduce
The operating pressure of block reduces exchange and surveys module and DC side module temperature, guarantees the continuous service of system.
Through the above description of the embodiments, those skilled in the art can be understood that according to above-mentioned implementation
The method of example can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but it is very much
In the case of the former be more preferably embodiment.Based on this understanding, technical solution of the present invention is substantially in other words to existing
The part that technology contributes can be embodied in the form of software products, which is stored in a storage
In medium (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal device (can be mobile phone, calculate
Machine, server or network equipment etc.) execute method described in each embodiment of the present invention.
Embodiment 2
A kind of control device of plant capacity, photovoltaic apparatus system, for realizing above-mentioned are additionally provided in the present embodiment
Embodiment and preferred embodiment, the descriptions that have already been made will not be repeated.As used below, term " module " can be real
The combination of the software and/or hardware of existing predetermined function.Although device described in following embodiment is preferably realized with software,
But the realization of the combination of hardware or software and hardware is also that may and be contemplated.
Embodiment provides a kind of control device of plant capacity, and Fig. 6 is a kind of plant capacity of the embodiment of the present invention
The structural block diagram of control device, the device include: detection module 60, acquisition module 62, control module 64, wherein.
Detection module 60, for detecting the operating mode of photovoltaic apparatus, wherein the photovoltaic apparatus passes through direct current DC module
Photovoltaic DC power supply and AC network are respectively connected to AC module is exchanged；
Module 62 is obtained, for obtaining the status information of the DC module and the AC module according to the operation mode；
Control module 64, for controlling the realtime power of the photovoltaic DC power supply according to the state information.
Optionally, optionally, the operating mode includes power generation mode and with power mode, and the detection module includes: inspection
Unit is surveyed, for detecting the electric energy transmission direction between the AC network and the photovoltaic apparatus；Determination unit, in institute
When stating photovoltaic apparatus and generating electricity to the AC network, determine that the operating mode is power generation mode；In the AC network to institute
When stating photovoltaic apparatus power supply, determine that the operating mode is to use power mode.
Optionally, the acquisition module includes: first acquisition unit, is used for when the operating mode is power generation mode,
Detect the first electricity of the first temperature value of the AC module, the second temperature value of the detection DC module, the detection AC module
Flow valuve；Second acquisition unit, for the operating mode be with power mode when, detect the AC module the first temperature value,
Detect the second temperature value of the DC module.
Optionally, when the operating mode is power generation mode, the control module includes: the first judging unit, is used for
Judge whether first temperature value is greater than the first temperature threshold, judges whether the second temperature value is greater than second temperature door
Limit, and judge whether first current value is greater than the first threshold；Limiting unit, for meeting the following conditions at least
For the moment: first temperature value is greater than the first temperature threshold, the second temperature value is greater than second temperature thresholding, described first
Current value is greater than the first threshold, limits the maximum power-adjustable of the photovoltaic DC power supply.
Optionally, the control module further include: second judgment unit, for limiting the photovoltaic in the limiting unit
After the maximum power-adjustable of DC power supply, judge whether first temperature value is less than third temperature threshold, judges described
Whether whether two temperature values are less than the 4th temperature threshold, and judge first current value less than the second threshold；First
Control unit, for when meeting the following conditions: it is small that first temperature value is less than third temperature threshold, the second temperature value
In the 4th temperature threshold, first current value less than the second threshold, the maximum for the photovoltaic DC power supply that lifts restrictions
Power-adjustable；When meeting at least one the following conditions: first temperature value is not less than third temperature threshold, second temperature
Angle value is not less than the second threshold not less than the 4th temperature threshold, first current value, keeps limiting the photovoltaic DC
The maximum power-adjustable of power supply.
Optionally, when the operating mode is power generation mode, the control module includes: third judging unit, is used for
Judge whether first temperature value is greater than the 5th temperature threshold, judges whether the second temperature value is greater than the 6th temperature door
Limit, and judge whether first current value is greater than third threshold；Adjustment unit, for meeting the following conditions at least
For the moment: first temperature value is greater than the 5th temperature threshold, the second temperature value is greater than the 6th temperature threshold, described first
Current value is greater than third threshold, and the realtime power of the photovoltaic DC power supply is reduced according to preset step-length.
Optionally, the control module further include: the 4th judging unit is used in the adjustment unit according to preset step-length
After the realtime power for reducing the photovoltaic DC power supply, judge that first temperature value whether less than the 7th temperature threshold, is sentenced
Whether the second temperature value break less than the 8th temperature threshold, and judges first current value whether less than the 4th electric current door
Limit；Second control unit, for when meeting the following conditions: first temperature value is less than the 7th temperature threshold, and described second
Less than the 8th temperature threshold, first current value stops reducing the photovoltaic DC electricity temperature value less than the 4th threshold
The realtime power in source；When meeting at least one the following conditions: first temperature value is not less than the 7th temperature threshold, and described the
Two temperature values are not less than the 8th temperature threshold, and first current value is not less than the 4th threshold, continue according to preset step-length
Reduce the realtime power of the photovoltaic DC power supply.
Optionally, when the operating mode is with power mode, the control module includes: the 5th judging unit, is used for
Judge that first temperature value is greater than the first temperature threshold, judges that the second temperature value is greater than second temperature thresholding；Third control
Unit processed, for when meeting at least one the following conditions: first temperature value is greater than the first temperature threshold, second temperature
Angle value is greater than second temperature thresholding, first current value is greater than the first threshold, limits the photovoltaic DC power supply most
Big power-adjustable.
Optionally, the control module further include: the 6th judging unit, described in being limited in the third control unit
After the maximum power-adjustable of photovoltaic DC power supply, judge that first temperature value is less than third temperature threshold, and judge institute
Second temperature value is stated less than the 4th temperature threshold；4th control unit, for when meeting the following conditions: first temperature value
Less than third temperature threshold, the second temperature value less than the 4th temperature threshold, the photovoltaic DC power supply is lifted restrictions most
Big power-adjustable；When meeting at least one the following conditions: first temperature value is not less than third temperature threshold, described second
Temperature value is not less than the 4th temperature threshold, keeps the maximum power-adjustable for limiting the photovoltaic DC power supply.
Embodiment additionally provides a kind of photovoltaic apparatus system, and Fig. 7 is a kind of photovoltaic apparatus system of the embodiment of the present invention
System connection figure, the system include at least: photovoltaic DC power supply 70, AC network 72, photovoltaic apparatus 74, and the photovoltaic apparatus is logical
It crosses direct current DC module and is respectively connected to the photovoltaic DC power supply and the AC network with AC module is exchanged, wherein the photovoltaic
Equipment includes device described in above-described embodiment.
It should be noted that above-mentioned modules can be realized by software or hardware, for the latter, Ke Yitong
Following manner realization is crossed, but not limited to this: above-mentioned module is respectively positioned in same processor；Alternatively, above-mentioned modules are with any
Combined form is located in different processors.
Embodiment 3
The embodiments of the present invention also provide a kind of storage medium, computer program is stored in the storage medium, wherein
The computer program is arranged to execute the step in any of the above-described embodiment of the method when operation.
Optionally, in the one aspect of the present embodiment, above-mentioned storage medium can be set to storage for execute with
The computer program of lower step:
S1 detects the operating mode of photovoltaic apparatus, wherein the photovoltaic apparatus by direct current DC module with exchange AC module
It is respectively connected to photovoltaic DC power supply and AC network；
S2 obtains the status information of the DC module and the AC module according to the operation mode；
S3 controls the realtime power of the photovoltaic DC power supply according to the state information.
Optionally, in the present embodiment, above-mentioned storage medium can include but is not limited to: USB flash disk, read-only memory (Read-
Only Memory, referred to as ROM), it is random access memory (Random Access Memory, referred to as RAM), mobile hard
The various media that can store computer program such as disk, magnetic or disk.
The embodiments of the present invention also provide a kind of electronic device, including memory and processor, stored in the memory
There is computer program, which is arranged to run computer program to execute the step in any of the above-described embodiment of the method
Suddenly.
Optionally, above-mentioned electronic device can also include transmission device and input-output equipment, wherein the transmission device
It is connected with above-mentioned processor, which connects with above-mentioned processor.
Optionally, in the one aspect of the present embodiment, above-mentioned processor can be set to hold by computer program
Row following steps:
S1 detects the operating mode of photovoltaic apparatus, wherein the photovoltaic apparatus by direct current DC module with exchange AC module
It is respectively connected to photovoltaic DC power supply and AC network；
S2 obtains the status information of the DC module and the AC module according to the operation mode；
S3 controls the realtime power of the photovoltaic DC power supply according to the state information.
Optionally, the specific example in the present embodiment can be with reference to described in above-described embodiment and optional embodiment
Example, details are not described herein for the present embodiment.
Obviously, those skilled in the art should be understood that each module of the above invention or each step can be with general
Computing device realize that they can be concentrated on a single computing device, or be distributed in multiple computing devices and formed
Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored
It is performed by computing device in the storage device, and in some cases, it can be to be different from shown in sequence execution herein
Out or description the step of, perhaps they are fabricated to each integrated circuit modules or by them multiple modules or
Step is fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific hardware and softwares to combine.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.It is all within principle of the invention, it is made it is any modification, etc.
With replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (13)
1. a kind of control method of plant capacity characterized by comprising
Detect the operating mode of photovoltaic apparatus, wherein the photovoltaic apparatus is connect by direct current DC module with AC module is exchanged respectively
Enter photovoltaic DC power supply and AC network；
The status information of the DC module and the AC module is obtained according to the operation mode；
The realtime power of the photovoltaic DC power supply is controlled according to the state information.
2. the method according to claim 1, wherein the operating mode includes power generation mode and with power mode,
Detection photovoltaic apparatus operating mode include:
Detect the electric energy transmission direction between the AC network and the photovoltaic apparatus；
When the photovoltaic apparatus generates electricity to the AC network, determine that the operating mode is power generation mode；In the exchange
When power grid is powered to the photovoltaic apparatus, determine that the operating mode is to use power mode.
3. the method according to claim 1, wherein obtaining the DC module and described according to the operation mode
The status information of AC module includes:
When the operating mode is power generation mode, detect the first temperature value of the AC module, the detection DC module the
First current value of two temperature values, the detection AC module；
When the operating mode is with power mode, detect the first temperature value of the AC module, the detection DC module the
Two temperature values.
4. according to the method described in claim 3, it is characterized in that, the operating mode be power generation mode when, according to described
The realtime power that status information controls the photovoltaic DC power supply includes:
Judge whether first temperature value is greater than the first temperature threshold, judges whether the second temperature value is greater than second temperature
Thresholding, and judge whether first current value is greater than the first threshold；
When meeting at least one the following conditions: it is big that first temperature value is greater than the first temperature threshold, the second temperature value
It is greater than the first threshold in second temperature thresholding, first current value, the maximum for limiting the photovoltaic DC power supply is adjustable
Power.
5. according to the method described in claim 4, it is characterized in that, in the maximum power-adjustable for limiting the photovoltaic DC power supply
Later, the method also includes:
Judge whether first temperature value is less than third temperature threshold, judges the second temperature value whether less than the 4th temperature
Thresholding, and judge first current value whether less than the second threshold；
When meeting the following conditions: first temperature value is less than third temperature threshold, the second temperature value less than the 4th temperature
Thresholding, first current value are spent less than the second threshold, the maximum power-adjustable for the photovoltaic DC power supply that lifts restrictions；
When meeting at least one the following conditions: first temperature value is not small not less than third temperature threshold, the second temperature value
It is not less than the second threshold in the 4th temperature threshold, first current value, keeps limiting the photovoltaic DC power supply most
Big power-adjustable.
6. according to the method described in claim 3, it is characterized in that, the operating mode be power generation mode when, according to described
The realtime power that status information controls the photovoltaic DC power supply includes:
Judge whether first temperature value is greater than the 5th temperature threshold, judges whether the second temperature value is greater than the 6th temperature
Thresholding, and judge whether first current value is greater than third threshold；
When meeting at least one the following conditions: it is big that first temperature value is greater than the 5th temperature threshold, the second temperature value
It is greater than third threshold in the 6th temperature threshold, first current value, reduces the photovoltaic DC electricity according to preset step-length
The realtime power in source.
7. according to the method described in claim 6, it is characterized in that, reducing the photovoltaic DC power supply according to preset step-length
After realtime power, the method also includes:
Judge that first temperature value whether less than the 7th temperature threshold, judges the second temperature value whether less than the 8th temperature
Thresholding, and judge first current value whether less than the 4th threshold；
When meeting the following conditions: first temperature value is less than the 7th temperature threshold, and the second temperature value is less than the 8th temperature
Thresholding is spent, first current value stops the realtime power for reducing the photovoltaic DC power supply less than the 4th threshold；Full
When at least one sufficient the following conditions: first temperature value is not less than the 7th temperature threshold, and the second temperature value is not less than the
Eight temperature thresholds, first current value are not less than the 4th threshold, continue to reduce the photovoltaic DC according to preset step-length
The realtime power of power supply.
8. according to the method described in claim 3, it is characterized in that, the operating mode be with power mode when, according to described
The realtime power that status information controls the photovoltaic DC power supply includes:
Judge that first temperature value is greater than the first temperature threshold, judges that the second temperature value is greater than second temperature thresholding；
When meeting at least one the following conditions: it is big that first temperature value is greater than the first temperature threshold, the second temperature value
It is greater than the first threshold in second temperature thresholding, first current value, the maximum for limiting the photovoltaic DC power supply is adjustable
Power.
9. according to the method described in claim 8, it is characterized in that, in the maximum power-adjustable for limiting the photovoltaic DC power supply
Later, the method also includes:
Judge that first temperature value is less than third temperature threshold, and judges the second temperature value less than the 4th temperature door
Limit；
When meeting the following conditions: first temperature value is less than third temperature threshold, the second temperature value less than the 4th temperature
Spend thresholding, the maximum power-adjustable for the photovoltaic DC power supply that lifts restrictions；When meeting at least one the following conditions: described
One temperature value is not less than the 4th temperature threshold not less than third temperature threshold, the second temperature value, keeps limiting the photovoltaic
The maximum power-adjustable of DC power supply.
10. a kind of control device of plant capacity characterized by comprising
Detection module, for detecting the operating mode of photovoltaic apparatus, wherein the photovoltaic apparatus by direct current DC module with exchange
AC module is respectively connected to photovoltaic DC power supply and AC network；
Module is obtained, for obtaining the status information of the DC module and the AC module according to the operation mode；
Control module, for controlling the realtime power of the photovoltaic DC power supply according to the state information.
11. a kind of photovoltaic apparatus system characterized by comprising photovoltaic DC power supply, AC network, photovoltaic apparatus, the light
It lies prostrate equipment and the photovoltaic DC power supply and the AC network is respectively connected to AC module is exchanged by direct current DC module, wherein
The photovoltaic apparatus includes device as claimed in claim 10.
12. a kind of storage medium, which is characterized in that be stored with computer program in the storage medium, wherein the computer
Program is arranged to perform claim when operation and requires method described in 1 to 9 any one.
13. a kind of electronic device, including memory and processor, which is characterized in that be stored with computer journey in the memory
Sequence, the processor are arranged to run the computer program in method described in perform claim 1 to 9 any one of requirement.
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