CN107860967A - And the detection means and method of off-network PV air-conditioner conversion efficiency - Google Patents
And the detection means and method of off-network PV air-conditioner conversion efficiency Download PDFInfo
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- G—PHYSICS
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
This application provides a kind of and off-network PV air-conditioner conversion efficiency detection means and method, the detection means includes：For supplying the DC power-supply system of photovoltaic electric for PV air-conditioner；Ac grid system；Energy storage device, air conditioning frequency converter are connected with ac grid system and/or energy storage device；DC digital electric energy meter, the output end of DC power-supply system and the input that energy storage device is defeated are respectively arranged at, for detecting dc power；AC current-voltage sensor, ac grid system input and PV air-conditioner compressor input are respectively arranged at, for detecting AC power；Power meter, it is connected with AC current-voltage sensor；Host computer is tested, is connected respectively with power meter and DC digital electric energy meter, for conversion efficiency to be calculated and be shown according to dc power and AC power.The detection means can automation collection data and result of calculation, realize pair and the efficient test of off-network PV air-conditioner conversion efficiency.
Description
Technical field
The present invention relates to air conditioner test technical field, in particular to a kind of and off-network PV air-conditioner conversion efficiency
Detection means and method.
Background technology
In recent years, with the development of photovoltaic technology, photovoltaic generation cost decline to a great extent and country is to development of renewable energy
The support energetically of exhibition is with promoting, and photovoltaic products emerge in an endless stream, and PV air-conditioner arises at the historic moment in this context.Realized in PV air-conditioner
Commercialization, commercialized testing standard, method are not perfect enough in recent years, mostly with reference to photovoltaic plant, the detection side of photovoltaic module
Formula, wherein, one of the performance test project of conversion efficiency as frequency converter, it is the important indicator for evaluating frequency converter quality.Photovoltaic
The frequency converter of air-conditioning is functionally not exclusively equal to the grid-connected frequency converter of tradition or air conditioning frequency converter, possesses bidirectional output function,
Its conversion efficiency detection method equally exists difference.In summary, existing measuring technology can not realize a pair simultaneously off-network air-conditioning conversion
The accurate test of efficiency.
For how to realize pair and the efficient test of off-network air-conditioning conversion efficiency, effective solution party is not yet proposed at present
Formula.
The content of the invention
It is existing to solve the embodiments of the invention provide a kind of and off-network PV air-conditioner conversion efficiency detection means and method
There is measuring technology can not realize pair and the problem of the efficient test of off-network air-conditioning conversion efficiency.
The application embodiment provides a kind of and off-network PV air-conditioner conversion efficiency detection means, including：Direct current supplies
Electric system, it is connected with PV air-conditioner frequency converter, for supplying photovoltaic electric for the PV air-conditioner；Ac grid system, for for institute
State PV air-conditioner and supply alternating current；Energy storage device, when the PV air-conditioner work of the ac grid system is left for storing
Unnecessary photovoltaic electric, wherein, the frequency converter is connected with the ac grid system and/or the energy storage device；DC digital
Electric energy meter, the output end of the DC power-supply system and the input that the energy storage device is defeated are respectively arranged at, it is straight for detecting
Flow power；AC current-voltage sensor, it is respectively arranged at the ac grid system input and PV air-conditioner compression
Machine input, for detecting AC power；Power meter, it is connected with the AC current-voltage sensor；Host computer is tested, point
It is not connected with the power meter and the DC digital electric energy meter, for according to the dc power and AC power calculating
And testing result is shown, the testing result includes the conversion efficiency of the PV air-conditioner.
In one embodiment, the DC power-supply system includes：Photovoltaic module or photovoltaic analog power.
In one embodiment, the DC power-supply system also includes photovoltaic distribution cabinet, the photovoltaic distribution cabinet difference
It is connected with the photovoltaic module, photovoltaic analog power, is the photovoltaic for switching photovoltaic module or the photovoltaic analog power
Air-conditioning supplies photovoltaic electric.
In one embodiment, the DC digital electric energy meter includes the first DC digital electric energy meter and the second direct current number
Word electric energy meter, the AC current-voltage sensor includes the first AC current-voltage sensor and the second AC current-voltage passes
Sensor, wherein, the first DC digital electric energy meter, it is arranged between the PV air-conditioner frequency converter and the DC power-supply system,
Power is provided for detecting photovoltaic；Second DC digital electric energy meter, it is arranged at the PV air-conditioner frequency converter and energy storage dress
Between putting, power is provided for detecting energy storage device；First AC current-voltage sensor, it is arranged at the PV air-conditioner frequency conversion
Between the compressor of device and tested PV air-conditioner, for detecting operation of air conditioner power；Second AC current-voltage sensor, set
Between the PV air-conditioner frequency converter and the AC network, for detecting network system input power；The power meter, it is defeated
Enter end to be connected with the first AC current-voltage sensor and the second AC current-voltage sensor respectively；The test
Host computer, the respectively output end with the power meter, the first DC digital electric energy meter, the second DC digital electric energy
Table connects.
Present invention also provides a kind of and off-network PV air-conditioner conversion efficiency detection method, the detection method includes：Inspection
Survey and obtain the AC power of the compressor input of PV air-conditioner；Detect and obtain the direct current of the output end of DC power-supply system
Power, wherein, the DC power-supply system is connected with the frequency converter of the PV air-conditioner, for supplying photovoltaic for the PV air-conditioner
Electricity；Detect and obtain the dc power of the input of energy storage device and the AC power of ac grid system input, wherein,
The frequency converter is connected with the energy storage device and/or the ac grid system, and the ac grid system is the photovoltaic
Air-conditioning supplies alternating current, and the energy storage device is used to store unnecessary during the PV air-conditioner work for leaving the ac grid system
Photovoltaic electric；Testing result is calculated and be shown according to the dc power and the AC power, the testing result includes institute
State PV air-conditioner conversion efficiency.
In one embodiment, testing result bag is calculated and be shown according to the dc power and the AC power
Include：According to the compressor power input of the compressor input, the on-off state of the PV air-conditioner is determined；According to described
The photovoltaic of the output end of DC power-supply system provides power, determines the hair electricity condition of the PV air-conditioner；According to the switch
Machine state, the hair electricity condition, the energy storage device input energy storage device provide power, the ac grid system
The network system input power of input, determine the mode of operation of the PV air-conditioner；According to the mode of operation, conversion is calculated
Efficiency simultaneously exports the conversion efficiency.
In one embodiment, before detecting and obtaining the AC power of compressor input of PV air-conditioner, institute
Stating detection method also includes：According to the type of the PV air-conditioner, installation, power-on equipment.
In one embodiment, according to the input of the on-off state, the hair electricity condition, the energy storage device
The energy storage device at end provides power, the network system input power of the ac grid system input, determines that the photovoltaic is empty
The mode of operation of tune；Power is provided according to the energy storage device, the network system input power determines the PV air-conditioner
And off-network state；According to the on-off state, the hair electricity condition, described and off-network state, the mode of operation is determined.
In one embodiment, according to the on-off state, the hair electricity condition, described and off-network state, really
The fixed mode of operation, including：If the compressor power input is more than 0, input work of the air-conditioning to the network system
Rate is more than 0, and the energy storage device provides power and is equal to 0, then the mode of operation is grid-connected photovoltaic air-conditioning and power generation mode；If institute
Compressor power input is stated more than 0, the air-conditioning is equal to 0 to the network system input power, and the energy storage device provides work(
Rate is equal to 0, then the mode of operation is grid-connected photovoltaic air conditioning mode；If the compressor power input is more than 0, the power network system
Unite and be more than 0 to the air-conditioning input power, the energy storage device provides power and is equal to 0, then the mode of operation is grid-connected photovoltaic
Air-conditioning and use power mode；If the compressor power input is equal to 0, the air-conditioning is more than 0 to the network system input power,
The energy storage device provides power and is equal to 0, then the mode of operation is pattern of generating electricity by way of merging two or more grid systems；If described compressor power input etc.
In 0, the air-conditioning is less than 0 to the network system input power, and the energy storage device provides power and is equal to 0, then the work
Pattern is to use power mode；If the compressor power input is more than 0, the air-conditioning is equal to 0 to the network system input power,
The energy storage device provides power to the air-conditioning and is more than 0, then the mode of operation is off-network PV air-conditioner and uses power mode；If
The compressor power input is more than 0, and the air-conditioning is equal to 0 to the network system input power, and the air-conditioning is to the storage
Energy device provides power and is more than 0, then the mode of operation is off-network PV air-conditioner and power generation mode；If the compressor input work
Rate is more than 0, and the air-conditioning is equal to 0 to the network system input power, and the energy storage device provides power etc. to the air-conditioning
In the compressor power input, then the mode of operation is off-network PV air-conditioner pattern；If the compressor power input is big
In 0, the air-conditioning is equal to 0 to the network system input power, and the air-conditioning provides power to the energy storage device and is more than 0,
Then the mode of operation is energy storage pattern.
In one embodiment, according to the mode of operation, calculate conversion efficiency and export the conversion efficiency, wrap
Include：According to the mode of operation and default conversion efficiency algorithm, conversion efficiency is calculated；Export the conversion efficiency；Wherein,
The preset algorithm includes：When the mode of operation is grid-connected photovoltaic air-conditioning and power generation mode, the default conversion efficiency algorithm
For n=(P0+Pw)/Pi；When the mode of operation is grid-connected photovoltaic air conditioning mode, the default conversion efficiency algorithm is n=Pw/
Pi；When the mode of operation is grid-connected photovoltaic air-conditioning and is n=Pw/ (Pi+ with power mode, the default conversion efficiency algorithm
P0)；When the mode of operation is pattern of generating electricity by way of merging two or more grid systems, the default conversion efficiency algorithm is n, n=P0/Pi；When the work
It with power mode, the default conversion efficiency algorithm is n=Pw/P0 that pattern, which is,；When the mode of operation be off-network PV air-conditioner and
With power mode, the default conversion efficiency algorithm is n=Pw/Pi+Pb；When the mode of operation is off-network PV air-conditioner and generating
Pattern, the default conversion efficiency algorithm are n=(Pw+Pb)/Pi；When the mode of operation is off-network PV air-conditioner pattern, institute
It is n=Pw/Pb to state default conversion efficiency algorithm；When the mode of operation is energy storage pattern, the default conversion efficiency algorithm is n
=Pb/Pi, wherein, P0 is absolute value of the air-conditioning to network system input power, and Pw is operation of air conditioner power, and Pi is photovoltaic
Power is provided, Pb provides the absolute value of power for the air-conditioning to energy storage device.
In the above-described embodiments, it is somebody's turn to do and the detection means of off-network PV air-conditioner conversion efficiency includes DC power-supply system, handed over
Flow network system, AC current-voltage sensor, DC digital electric energy meter, energy storage device, power meter and test host computer, quilt
The PV air-conditioner of survey can connect DC power-supply system, can also connect ac grid system and/or energy storage device respectively.This implementation
Example is empty by the defeated input of the output end to DC power-supply system and energy storage device, ac grid system input and photovoltaic
The detection of compressor input power is adjusted, then conversion efficiency is calculated collecting for host computer by power meter and test, can
Automation collection data and result of calculation are realized, PV air-conditioner detection conversion efficiency testing time efficiency is effectively increased, solves
Existing measuring technology can not realize pair and the problem of the efficient test of off-network air-conditioning conversion efficiency, realize pair and off-network photovoltaic
The efficient test of air-conditioning conversion efficiency.
Brief description of the drawings
The accompanying drawing for forming the part of the application is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the signal of the detection means according to a kind of alternative embodiment of the present invention and off-network PV air-conditioner conversion efficiency
Figure；
Fig. 2 is the signal of the detection means according to a kind of preferred embodiment of the present invention and off-network PV air-conditioner conversion efficiency
Figure；
Fig. 3 is the flow of the detection method according to a kind of alternative embodiment of the present invention and off-network PV air-conditioner conversion efficiency
Schematic diagram；
Fig. 4 is the stream of the detection method according to another alternative embodiment of the present invention and off-network PV air-conditioner conversion efficiency
Journey schematic diagram.
Embodiment
It is right with reference to embodiment and accompanying drawing for the object, technical solutions and advantages of the present invention are more clearly understood
The present invention is described in further details.Here, the exemplary embodiment of the present invention and its illustrate to be used to explain the present invention, but simultaneously
It is not as a limitation of the invention.
Conversion efficiency in view of PV air-conditioner is one of important performance test event of frequency converter, the frequency conversion of PV air-conditioner
Device is functionally different from the grid-connected frequency converter of tradition or air conditioning frequency converter, has bidirectional output function, its conversion efficiency detection method
Have differences, and existing method of testing and testing standard to PV air-conditioner is not perfect enough.The above analysis, existing test
Technology presence can not be realized pair and the problem of the accurate test of off-network air-conditioning conversion efficiency.
For produce above-mentioned technical problem basic reason, the application consider can with automation collection data, result of calculation,
PV air-conditioner detection conversion efficiency testing time efficiency is effectively improved, by by DC power-supply system (photovoltaic module or photovoltaic mould
Intend power supply), ac grid system, AC current-voltage sensor, DC digital electric energy meter, energy storage device, power meter, test electricity
The detection means that brain server is formed.Tested PV air-conditioner model machine connection DC power-supply system, can connect AC network system respectively
System, energy storage device, realize the efficient test of simultaneously off-network PV air-conditioner conversion efficiency.
Based on above-mentioned thinking thinking, the application embodiment provides a kind of and off-network PV air-conditioner conversion efficiency detection
Device, specifically can refer to shown in Fig. 1 according to a kind of alternative embodiment of the present invention and off-network PV air-conditioner conversion efficiency
The schematic diagram of detection means.The detection means of this and off-network PV air-conditioner conversion efficiency includes：DC power-supply system 10, alternating current
Net system 20, energy storage device 30, DC digital electric energy meter 40, AC current-voltage sensor 50, power meter 60 and test computer
Main frame 70, wherein：
DC power-supply system 10, it is connected with PV air-conditioner frequency converter, for supplying photovoltaic electric for PV air-conditioner.
In an optional embodiment, above-mentioned DC power-supply system 10 can include photovoltaic module or photovoltaic simulation electricity
Source.The DC power-supply system 10 can also include photovoltaic distribution cabinet, one end of the photovoltaic distribution cabinet 103 can respectively with photovoltaic group
Part connects with photovoltaic analog power, and the other end can connect PV air-conditioner frequency converter, and the photovoltaic distribution cabinet is used to switch photovoltaic group
Part or photovoltaic analog power are that PV air-conditioner supplies photovoltaic electric.
Ac grid system 20, for supplying alternating current for PV air-conditioner.
Energy storage device 30, photovoltaic electric unnecessary during the PV air-conditioner work of ac grid system is left for storing, wherein,
Frequency converter is connected with ac grid system and/or energy storage device.
DC digital electric energy meter 40, the output end of DC power-supply system and the input that energy storage device is defeated are respectively arranged at,
For detecting dc power.
AC current-voltage sensor 50, is respectively arranged at ac grid system input and PV air-conditioner compressor is defeated
Enter end, for detecting AC power.
Power meter 60, it is connected with AC current-voltage sensor.
Host computer 70 is tested, is connected respectively with power meter and DC digital electric energy meter, for according to dc power and friendship
Stream power calculation simultaneously shows testing result, and testing result includes the conversion efficiency of PV air-conditioner.
In an optional embodiment, above-mentioned testing result is except that including conversion efficiency, can also include Working mould
Formula.
In the above-described embodiments, it is somebody's turn to do and the detection means of off-network PV air-conditioner conversion efficiency includes DC power-supply system, handed over
Flow network system, AC current-voltage sensor, DC digital electric energy meter, energy storage device, power meter and test host computer, quilt
DC power-supply system can be connected by surveying PV air-conditioner, can also connect ac grid system and/or energy storage device respectively.The present embodiment
Pass through the defeated input of the output end to DC power-supply system and energy storage device, ac grid system input and PV air-conditioner
The detection of compressor input power, then conversion efficiency is calculated collecting for host computer by power meter and test, can be real
Existing automation collection data and result of calculation, PV air-conditioner detection conversion efficiency testing time efficiency is effectively increased, is solved
Existing measuring technology can not realize pair and the problem of the efficient test of off-network air-conditioning conversion efficiency, realize pair and off-network photovoltaic is empty
Adjust the efficient test of conversion efficiency.
Using above-mentioned embodiment, except automation collection data, result of calculation can be realized, PV air-conditioner is effectively improved
Detect outside conversion efficiency testing time efficiency；The survey that detection means realizes simultaneously off-network PV air-conditioner conversion efficiency can also be provided
Examination, experimental implementation is simple, can solve the problems, such as portable power analyzer passage deficiency；In addition, obtained using above-mentioned detection device
The test result arrived is accurate, and each mode of operation of recognizable PV air-conditioner.
In one preferred embodiment, referring to shown in Fig. 2 according to a kind of preferred embodiment of the present invention and off-network
The schematic diagram of the detection means of PV air-conditioner conversion efficiency, DC power-supply system can include photovoltaic module, photovoltaic analog power
And photovoltaic distribution cabinet, one end of the photovoltaic distribution cabinet are connected with photovoltaic module and photovoltaic analog power respectively, other end connection light
Air conditioning frequency converter is lied prostrate, it is that PV air-conditioner supplies photovoltaic electric that the photovoltaic distribution cabinet, which is used to switch photovoltaic module or photovoltaic analog power,.
The DC digital electric energy meter includes the first DC digital electric energy meter and the second DC digital electric energy meter, that is, as schemed
DC digital electric energy meter 1 and DC digital electric energy meter 2 shown in 2, wherein, the first DC digital electric energy meter, it is arranged at photovoltaic sky
Between the output end for adjusting the photovoltaic distribution cabinet of frequency converter and DC power-supply system, power P i is provided for detecting photovoltaic；Second is straight
Streaming digital electric energy meter, it is arranged between PV air-conditioner frequency converter and energy storage device, power P b is provided for detecting energy storage device；
AC current-voltage sensor includes the first AC current-voltage sensor and the second AC current-voltage sensor,
Alternating current, voltage sensor 1 and alternating current i.e. as shown in Figure 2, voltage sensor 2, wherein, the first AC current-voltage
Sensor, it is arranged between the compressor of PV air-conditioner frequency converter and tested PV air-conditioner, for detecting operation of air conditioner power P w；
Second AC current-voltage sensor, is arranged between PV air-conditioner frequency converter and AC network, defeated for detecting network system
Enter power P b；
Power meter, input connect with the first AC current-voltage sensor and the second AC current-voltage sensor respectively
Connect；Host computer is tested, the output end with power meter, the first DC digital electric energy meter, the second DC digital electric energy meter connect respectively
Connect.
It is simple using above-mentioned test device, experimental implementation, it is only necessary to which that the test sensor for installing compressor input is connected into survey
Try equipment；Always according to the algorithm of given conversion efficiency, Intelligent Recognition PV air-conditioner mode of operation, result of calculation are realized.
Based on same inventive concept, a kind of and off-network PV air-conditioner conversion efficiency inspection is additionally provided in the embodiment of the present invention
Survey method, can specifically refer to shown in Fig. 3 according to a kind of alternative embodiment of the present invention and off-network PV air-conditioner conversion efficiency
Detection method schematic flow sheet, such as the following examples.By and off-network PV air-conditioner conversion efficiency detection means institute
The principle solved the problems, such as is similar to the detection method of simultaneously off-network PV air-conditioner conversion efficiency, therefore simultaneously off-network PV air-conditioner conversion effect
The implementation of the detection means of rate may refer to and the implementation of the detection method of off-network PV air-conditioner conversion efficiency, repeats part no longer
Repeat.
Present invention also provides a kind of and off-network PV air-conditioner conversion efficiency detection method, as shown in figure 3, the detection side
Method includes：
S102, detect and obtain the AC power of the compressor input of PV air-conditioner；
In step, the AC power of compressor input can determine the on-off state of PV air-conditioner, if exchange work(
Rate is more than 0, then the compressor operating of air-conditioning, and air-conditioning is in start running status, if AC power is equal to 0, the compression of air-conditioning
Machine off-duty, air-conditioning are in off-mode.
S104, detect and obtain the dc power of the output end of DC power-supply system, wherein, DC power-supply system is for being
PV air-conditioner supplies photovoltaic electric；
In this step, DC power-supply system, which can include photovoltaic module or photovoltaic analog circuit etc., can provide photovoltaic electric
System, the dc power of the output end of DC power-supply system can be referred to as photovoltaic and provide power.Photovoltaic provides power and is more than
PV air-conditioner runs power, then unnecessary photovoltaic electric is transfused to ac grid system or energy storage device, and now PV air-conditioner is
Generating state；If photovoltaic, which provides power, is less than PV air-conditioner operation power, then ac grid system or energy storage device need
The electricity lacked is provided to PV air-conditioner, then now grid-connected photovoltaic air-conditioning is to use electricity condition.
S106, detect and obtain the dc power of the input of energy storage device and exchanging for ac grid system input
Power, wherein, PV air-conditioner is connected with energy storage device and/or ac grid system, and ac grid system is PV air-conditioner for handing over
Stream electricity, energy storage device are used to store photovoltaic electric unnecessary during the PV air-conditioner work for leaving ac grid system；
In this step, the dc power of the input of energy storage device is properly termed as energy storage device and provides power, Huo Zhexiang
Energy storage device provides power.
In the present embodiment, the AC power of ac grid system input can be referred to as network system to air-conditioning input
Power, or air-conditioning system is to network system input power.
If the absolute value that energy storage device provides power is more than 0, then it can know that PV air-conditioner connects the energy storage device, if
Energy storage device provides power and is more than 0, then energy storage device provides power to PV air-conditioner, if energy storage device provides power and is less than 0, i.e.,
Power is provided to energy storage device and is more than 0, then PV air-conditioner provides power to energy storage device, for operation of air conditioner.
If network system is more than 0 to the absolute value of air-conditioning input power, PV air-conditioner connects ac grid system, photovoltaic
Air-conditioning is grid-connected photovoltaic air-conditioning；Otherwise air-conditioning is connection ac grid system, is off-network PV air-conditioner.If grid-connected photovoltaic air-conditioning
When, photovoltaic provides power and is more than PV air-conditioner operation power, then unnecessary photovoltaic electric is transfused to ac grid system, this time
Volt air-conditioning is generating state；If photovoltaic, which provides power, is less than PV air-conditioner operation power, then ac grid system is needed to light
Volt air-conditioning provides the electricity lacked, then now grid-connected photovoltaic air-conditioning is to use electricity condition.
In the present embodiment, if photovoltaic provide power absolute value be more than 0 and energy-storage battery provide power absolute value it is big
In 0, PV air-conditioner not only connects with energy storage device, but also is connected with ac grid system, then now, PV air-conditioner is simultaneously
Off-network state.
S108, testing result is calculated and be shown according to dc power and AC power, testing result turns including PV air-conditioner
Change efficiency.
, can be according to dc power and AC power, and default conversion efficiency algorithm, to count in the present embodiment mode
Actual conversion efficiency is calculated, and PV air-conditioner mode of operation can also be identified according to dc power and AC power, then will
Mode of operation and the output of corresponding the two test results of actual converted efficiency, preferably display mode export.
Using above-mentioned embodiment, except automation collection data, result of calculation can be realized, PV air-conditioner is effectively improved
Detect outside conversion efficiency testing time efficiency；The survey that detection means realizes simultaneously off-network PV air-conditioner conversion efficiency can also be provided
Examination, experimental implementation is simple, can solve the problems, such as portable power analyzer passage deficiency；In addition, obtained using above-mentioned detection device
The test result arrived is accurate, and each mode of operation of recognizable PV air-conditioner.
In an optional embodiment, detection knot is calculated and be shown according to dc power and AC power in step S108
Fruit includes following process：
(1) according to the compressor power input of compressor input, the on-off state of PV air-conditioner is determined；
In this process (1), compressor power input is equal to 0, air-conditioning shutdown；Not equal to 0, then air-conditioning start compressor is transported
OK.The process (1) can be carried out after above-mentioned steps S102 and before above-mentioned steps S103, can also be after step s 106
Carry out, the sequence number of above-mentioned steps is mainly used in role of delegate, does not have to the restriction effect successively performed.
(2) power is provided according to the photovoltaic of the output end of DC power-supply system, determines generating state；
Wherein, photovoltaic provides power more than PV air-conditioner operation power, then unnecessary photovoltaic electric is transfused to AC network
System or energy storage device, now PV air-conditioner is generating state；If photovoltaic, which provides power, is less than PV air-conditioner operation power, then
Ac grid system or energy storage device need to provide the electricity lacked to PV air-conditioner, then now grid-connected photovoltaic air-conditioning is electricity consumption
State.
(3) according to open state, generating state, energy storage device input energy storage device provide power, AC network
The network system input power of system input, determine the mode of operation of PV air-conditioner；
In an optional embodiment, according to on-off state, hair electricity condition, energy storage device input storage
Energy device provides power, the network system input power of ac grid system input, determines the mode of operation of PV air-conditioner, bag
Include：
3a) power, network system input power determine PV air-conditioner and off-network state is provided according to energy storage device；
Wherein, if the absolute value that energy storage device provides power is more than 0, then can know that PV air-conditioner connects energy storage dress
Put, and have power transmission, then the air-conditioning is in off-network state.If energy storage device provides power and is more than 0, energy storage device is to light
Lie prostrate air-conditioning provide power, if energy storage device provide power be less than 0, i.e., to energy storage device provide power be more than 0, then PV air-conditioner to
Energy storage device provides power, for operation of air conditioner.
If network system is more than 0 to the absolute value of air-conditioning input power, PV air-conditioner connects ac grid system, photovoltaic
Air-conditioning is grid-connected photovoltaic air-conditioning；Otherwise air-conditioning is not connected ac grid system, is off-network PV air-conditioner.
In the present embodiment, if photovoltaic provide power absolute value be more than 0 and energy-storage battery provide power absolute value it is big
In 0, PV air-conditioner not only connects with energy storage device, but also is connected with ac grid system, then now, PV air-conditioner is simultaneously
Off-network state.
In an optional embodiment, when tested air-conditioning connects DC power-supply system, ac grid system, sky is tested
It is adjusted to grid-connected photovoltaic air-conditioning；When tested air-conditioning connects DC power-supply system, energy storage device, it is that off-network photovoltaic is empty to be tested air-conditioning
Adjust；When tested air-conditioning connects DC power-supply system, ac grid system and energy storage device, it is empty for simultaneously off-network photovoltaic to be tested air-conditioning
Adjust.
3b) according to on-off state, hair electricity condition and off-network state, mode of operation is determined.
Above-mentioned mode of operation includes on-off state, generating state and and off-network state.In a preferred embodiment
In, according to on-off state, hair electricity condition and off-network state, mode of operation is determined, including：
If compressor power input is more than 0, air-conditioning is more than 0 to the input power of network system, and energy storage device provides power
Equal to 0, then mode of operation is grid-connected photovoltaic air-conditioning and power generation mode；
If compressor power input is more than 0, air-conditioning is equal to 0 to network system input power, and energy storage device provides power etc.
In 0, then mode of operation is grid-connected photovoltaic air conditioning mode；
If compressor power input is more than 0, network system is more than 0 to air-conditioning input power, and energy storage device provides power etc.
In 0, then mode of operation is grid-connected photovoltaic air-conditioning and uses power mode；
If compressor power input is equal to 0, air-conditioning is more than 0 to network system input power, and energy storage device provides power etc.
In 0, then mode of operation is pattern of generating electricity by way of merging two or more grid systems；
If compressor power input is equal to 0, more than 0, (i.e. air-conditioning is defeated to network system to air-conditioning input power for network system
Enter power to be less than 0), energy storage device provides power and is equal to 0, then mode of operation is to use power mode；
If compressor power input is more than 0, air-conditioning is equal to 0 to network system input power, and energy storage device provides to air-conditioning
Power is more than 0, then mode of operation is off-network PV air-conditioner and uses power mode；
If compressor power input is more than 0, air-conditioning is equal to 0 to network system input power, and air-conditioning provides to energy storage device
Power is more than 0, then mode of operation is off-network PV air-conditioner and power generation mode；
If compressor power input is more than 0, air-conditioning is equal to 0 to network system input power, and energy storage device provides to air-conditioning
Power is equal to compressor power input, then mode of operation is off-network PV air-conditioner pattern；
If compressor power input is more than 0, air-conditioning is equal to 0 to network system input power, and air-conditioning provides to energy storage device
Power is more than 0, then mode of operation is energy storage pattern.
(4) according to mode of operation, calculate conversion efficiency and export conversion efficiency.
In an optional embodiment, according to mode of operation and default conversion efficiency algorithm, conversion effect is calculated
Rate；Export conversion efficiency；Wherein, preset algorithm includes：
When mode of operation is grid-connected photovoltaic air-conditioning and power generation mode, it is n=(P0+Pw)/Pi to preset conversion efficiency algorithm；
When mode of operation is grid-connected photovoltaic air conditioning mode, it is n=Pw/Pi to preset conversion efficiency algorithm；
When mode of operation is grid-connected photovoltaic air-conditioning and with power mode, it is n=Pw/ (Pi+P0) to preset conversion efficiency algorithm；
When mode of operation is pattern of generating electricity by way of merging two or more grid systems, it is n, n=P0/Pi to preset conversion efficiency algorithm；
When mode of operation is with power mode, it is n=Pw/P0 to preset conversion efficiency algorithm；
When mode of operation is off-network PV air-conditioner and with power mode, it is n=Pw/Pi+Pb to preset conversion efficiency algorithm；
When mode of operation is off-network PV air-conditioner and power generation mode, it is n=(Pw+Pb)/Pi to preset conversion efficiency algorithm；
When mode of operation is off-network PV air-conditioner pattern, it is n=Pw/Pb to preset conversion efficiency algorithm；
When mode of operation is energy storage pattern, it is n=Pb/Pi to preset conversion efficiency algorithm, wherein,
P0 is absolute value of the air-conditioning to network system input power, and Pw is operation of air conditioner performance number, and Pi provides work(for photovoltaic
Rate value, Pb provide the absolute value of power for air-conditioning to energy storage device.
In an optional embodiment, detect and obtain the compressor input of PV air-conditioner AC power it
Before, detection method also includes：According to the type of PV air-conditioner, installation, power-on equipment.
By using above-mentioned embodiment, according to the type of PV air-conditioner, the power-supply device of detection is selectively turned on, this
Sample can effectively improve PV air-conditioner detection conversion efficiency testing time efficiency with the acquisition power signal of precise and high efficiency.
In the specific embodiment, referring to shown in Fig. 4 according to another alternative embodiment of the present invention and from
The schematic flow sheet of the detection method of net PV air-conditioner conversion efficiency, it is somebody's turn to do the detection method bag of simultaneously off-network PV air-conditioner conversion efficiency
Include following steps：
S1, according to air-conditioning type, installation, power-on equipment；
Before detection starts, it is only necessary to alternating current, voltage sensor 1 are arranged on into compressor input, remaining device manually
Connected in advance in equipment end.
When tested air-conditioning connection DC power-supply system (photovoltaic module or photovoltaic analog power), ac grid system, survey
Try grid-connected photovoltaic air-conditioning；When connecting DC power-supply system, energy storage device, off-network PV air-conditioner is tested；When connection direct current supply
When system, energy storage device, ac grid system, simultaneously off-network PV air-conditioner system is tested.
S2, compressor power input is detected, determines open state；
In the present embodiment, compressor power input is more than 0, it is determined that and air-conditioning is running status or open state, if
Compressor power input is 0, it is determined that air-conditioning is not running status or off-mode.
S3, detection photovoltaic provide power, determine generating state；
In the present embodiment, if photovoltaic provides power and is more than power needed for operation of air conditioner, then determine the direct current of air-conditioning
Electric power system generates electricity, and in addition to providing the compressor power input of operation of air conditioner, can also be powered to ac grid system, this
When, the mode of operation of air-conditioning includes power generation mode.
If photovoltaic, which provides power, is less than or equal to power needed for operation of air conditioner, then determines the DC power-supply system deficiency of air-conditioning
To provide the compressor power input of operation of air conditioner, and ac grid system is needed to be powered to PV air-conditioner, now, the work of air-conditioning
Operation mode includes using power mode.
S4, detection energy storage device provide power, network system input power, determine mode of operation；
In the present embodiment, if detecting, energy storage device provides power and is more than 0, can determine energy storage device and photovoltaic
Air conditioning frequency converter connects, then the mode of operation of PV air-conditioner includes off-network pattern；In the present embodiment, if detecting, energy storage fills
Put and provide power equal to 0, then can determine that energy storage device is not connected with or is connected with PV air-conditioner frequency converter but changed without power,
Then the mode of operation of PV air-conditioner includes grid-connect mode；
In the present embodiment, if detecting, network system input power is more than 0, and ac grid system is defeated to PV air-conditioner
Enter alternating current, then can determine that ac grid system is connected with PV air-conditioner, then the mode of operation of PV air-conditioner includes grid-connected mould
Formula；If detecting, network system input power is equal to 0, or is more than 0 less than 0, namely to network system input power, then direct current supplies
Electric system exports photovoltaic electric by tested air-conditioning to ac grid system, then can determine that ac grid system not with PV air-conditioner
Connection, then the mode of operation of PV air-conditioner does not include grid-connect mode, including off-network pattern.
S5, according to mode of operation, calculate conversion efficiency；
Wherein, according to mode of operation, calculating conversion efficiency can specifically include step S5：
When testing PV air-conditioner, according to air-conditioning type, air conditioner load, DC power-supply system output loading, energy storage dress are adjusted
Output is put, each mode of operation identification and conversion efficiency method of testing are as follows：
PV air-conditioner and power generation mode (grid-connected)：Operation of air conditioner is detected, power P w, photovoltaic provides power P i, to power network system
Input power of uniting Po.Conversion efficiency is n=(Po+Pw)/Pi.
PV air-conditioner pattern (grid-connected)：Operation of air conditioner, power P w are detected, photovoltaic provides power P i, is inputted to network system
Power P o=0, conversion efficiency n=Pw/Pi.
PV air-conditioner and with power mode (grid-connected)：Operation of air conditioner, power P w are detected, photovoltaic provides power P i, network system
To air-conditioning input power Po, conversion efficiency is n=Pw/ (Pi+Po).
Power generation mode (grid-connected)：Detection air-conditioning is not run, and Pw=0, photovoltaic provides power P i, network system power P o, turn
It is n=Po/Pi to change efficiency.
Use power mode：Operation of air conditioner, power P w are detected, photovoltaic does not provide power P i=0, and energy storage device does not provide power P b
=0, network system to air-conditioning input power Po, conversion efficiency n=Pw/Po,
PV air-conditioner and with power mode (off-network)：Operation of air conditioner, power P w are detected, photovoltaic provides power P i, energy storage device
Power P b is provided, conversion efficiency is n=Pw/ (Pi+Pb).
PV air-conditioner and power generation mode (off-network)：Operation of air conditioner, power P w are detected, photovoltaic provides power P i, is filled to energy storage
Put and power P b is provided, conversion efficiency is n=(Pw+Pb)/Pi.
Off-network air conditioning mode：Operation of air conditioner, power P w are detected, energy-storage battery provides power P b and is equal to power needed for air-conditioning
Pw, conversion efficiency n=Pw/Pb.
Energy storage pattern：Detection air-conditioning is not run, and power P w=0, photovoltaic provides power P i, and power is provided to energy storage device
Pb, conversion efficiency n=Pb/Pi.
S6, output.Test result is calculated and be shown by test computer.
By using above-mentioned embodiment, PV air-conditioner detection can be effectively improved with automation collection data, result of calculation
Conversion efficiency testing time efficiency；The test that detection means realizes simultaneously off-network PV air-conditioner conversion efficiency, experimental implementation can be provided
Simply, can solve the problems, such as portable power analyzer passage deficiency；Test result is accurate, can recognize that each Working mould of PV air-conditioner
Formula.
In another embodiment, a kind of software is additionally provided, the software is used to perform above-described embodiment and be preferable to carry out
Technical scheme described in mode.
In another embodiment, a kind of storage medium is additionally provided, above-mentioned software is stored with the storage medium, should
Storage medium includes but is not limited to：CD, floppy disk, hard disk, erasable storage device etc..
Obviously, those skilled in the art should be understood that each module of the above-mentioned embodiment of the present invention or each step can be with
Realized with general computing device, they can be concentrated on single computing device, or are distributed in multiple computing devices
On the network formed, alternatively, they can be realized with the program code that computing device can perform, it is thus possible to by it
Store and performed in the storage device by computing device, and in some cases, can be to be held different from order herein
They, are either fabricated to each integrated circuit modules or will be multiple in them by the shown or described step of row respectively
Module or step are fabricated to single integrated circuit module to realize.So, the embodiment of the present invention is not restricted to any specific hard
Part and software combine.
The preferred embodiments of the present invention are these are only, are not intended to limit the invention, for those skilled in the art
For member, the embodiment of the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made is any
Modification, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of and off-network PV air-conditioner conversion efficiency detection means, is characterised by, including：
DC power-supply system, it is connected with PV air-conditioner frequency converter, for supplying photovoltaic electric for the PV air-conditioner；
Ac grid system, for supplying alternating current for the PV air-conditioner；
Energy storage device, photovoltaic electric unnecessary during the PV air-conditioner work of the ac grid system is left for storing, its
In, the frequency converter is connected with the ac grid system and/or the energy storage device；
DC digital electric energy meter, it is respectively arranged at the output end of the DC power-supply system and the input that the energy storage device is defeated
End, for detecting dc power；
AC current-voltage sensor, it is respectively arranged at the ac grid system input and the PV air-conditioner compressor
Input, for detecting AC power；
Power meter, it is connected with the AC current-voltage sensor；
Host computer is tested, is connected respectively with the power meter and the DC digital electric energy meter, for according to the direct current work(
Testing result is calculated and be shown in rate and the AC power, and the testing result includes the conversion efficiency of the PV air-conditioner.
2. detection means according to claim 1, it is characterised in that the DC power-supply system includes：Photovoltaic module or
Photovoltaic analog power.
3. detection means according to claim 2, it is characterised in that the DC power-supply system also includes photovoltaic distribution
Cabinet, the photovoltaic distribution cabinet is connected with the photovoltaic module, the photovoltaic analog power respectively, for switching the photovoltaic module
Or photovoltaic analog power is that the PV air-conditioner supplies photovoltaic electric.
4. detection means according to claim 1, it is characterised in that the DC digital electric energy meter includes the first direct current number
Word electric energy meter and the second DC digital electric energy meter, the AC current-voltage sensor include the first AC current-voltage sensor
With the second AC current-voltage sensor, wherein,
First DC digital electric energy meter, it is arranged between the PV air-conditioner frequency converter and the DC power-supply system, for examining
Light-metering volt provides power；
Second DC digital electric energy meter, it is arranged between the PV air-conditioner frequency converter and the energy storage device, is stored up for detecting
Can device offer power；
First AC current-voltage sensor, be arranged at the PV air-conditioner frequency converter and the PV air-conditioner compressor it
Between, for detecting operation of air conditioner power；
Second AC current-voltage sensor, it is arranged between the PV air-conditioner frequency converter and the ac grid system, uses
In detection network system input power；
The power meter, input pass with the first AC current-voltage sensor and second AC current-voltage respectively
Sensor connects；
The test host computer, the respectively output end with the power meter, the first DC digital electric energy meter, described second
DC digital electric energy meter connects.
5. a kind of and off-network PV air-conditioner conversion efficiency detection method, is characterised by, including：
Detect and obtain the AC power of the compressor input of PV air-conditioner；
Detect and obtain the dc power of the output end of DC power-supply system, wherein, the DC power-supply system and the photovoltaic
The frequency converter connection of air-conditioning, for supplying photovoltaic electric for the PV air-conditioner；
Detect and obtain the dc power of the input of energy storage device and the AC power of ac grid system input, wherein,
The frequency converter is connected with the energy storage device and/or the ac grid system, and the ac grid system is the photovoltaic
Air-conditioning supplies alternating current, and the energy storage device is used to store unnecessary during the PV air-conditioner work for leaving the ac grid system
Photovoltaic electric；
Testing result is calculated and be shown according to the dc power and the AC power, the testing result includes the photovoltaic
Air-conditioning conversion efficiency.
6. detection method according to claim 5, it is characterised in that according to the dc power and the AC power meter
Calculate and show that testing result includes：
According to the compressor power input of the compressor input, the on-off state of the PV air-conditioner is determined；
Power is provided according to the photovoltaic of the output end of the DC power-supply system, determines the hair electricity condition of the PV air-conditioner；
According to the on-off state, the hair electricity condition, the energy storage device input energy storage device provide power,
The network system input power of the ac grid system input, determine the mode of operation of the PV air-conditioner；
According to the mode of operation, calculate conversion efficiency and export the conversion efficiency.
7. detection method according to claim 6, it is characterised in that detecting and obtaining the compressor input of PV air-conditioner
Before the AC power at end, the detection method also includes：
According to the type of the PV air-conditioner, installation, power-on equipment.
8. detection method according to claim 6, it is characterised in that according to the on-off state, the hair electricity shape
State, to provide power, the network system of the ac grid system input defeated for the energy storage device of input of the energy storage device
Enter power, determine the mode of operation of the PV air-conditioner, including：
Power, the network system input power determine the PV air-conditioner and off-network shape is provided according to the energy storage device
State；
According to the on-off state, the hair electricity condition, described and off-network state, the mode of operation is determined.
9. detection method according to claim 8, it is characterised in that according to the on-off state, the hair electricity shape
State, described and off-network state, determine the mode of operation, including：
If the compressor power input is more than 0, the air-conditioning is more than 0 to the input power of the network system, the energy storage
Device provides power and is equal to 0, then the mode of operation is grid-connected photovoltaic air-conditioning and power generation mode；
If the compressor power input is more than 0, the air-conditioning is equal to 0 to the network system input power, the energy storage dress
Put and provide power equal to 0, then the mode of operation is grid-connected photovoltaic air conditioning mode；
If the compressor power input is more than 0, the network system is more than 0 to the air-conditioning input power, the energy storage dress
Put and provide power equal to 0, then the mode of operation is grid-connected photovoltaic air-conditioning and uses power mode；
If the compressor power input is equal to 0, the air-conditioning is more than 0 to the network system input power, the energy storage dress
Put and provide power equal to 0, then the mode of operation is pattern of generating electricity by way of merging two or more grid systems；
If the compressor power input is equal to 0, the network system is more than 0 to the air-conditioning input power, the energy storage dress
Put and provide power equal to 0, then the mode of operation is to use power mode；
If the compressor power input is more than 0, the air-conditioning is equal to 0 to the network system input power, the energy storage dress
Put to the air-conditioning and provide power more than 0, then the mode of operation is off-network PV air-conditioner and uses power mode；
If the compressor power input be more than 0, the air-conditioning to the network system input power be equal to 0, the air-conditioning to
The energy storage device provides power and is more than 0, then the mode of operation is off-network PV air-conditioner and power generation mode；
If the compressor power input is more than 0, the air-conditioning is equal to 0 to the network system input power, the energy storage dress
Put to air-conditioning offer power and be equal to the compressor power input, then the mode of operation is off-network PV air-conditioner pattern；
If the compressor power input be more than 0, the air-conditioning to the network system input power be equal to 0, the air-conditioning to
The energy storage device provides power and is more than 0, then the mode of operation is energy storage pattern.
10. detection method according to claim 9, it is characterised in that according to the mode of operation, calculate conversion efficiency simultaneously
The conversion efficiency is exported, including：
According to the mode of operation and default conversion efficiency algorithm, conversion efficiency is calculated；
Export the conversion efficiency；
Wherein, the preset algorithm includes：When the mode of operation is grid-connected photovoltaic air-conditioning and power generation mode, the default conversion
Efficiency algorithm is n=(P0+Pw)/Pi；
When the mode of operation is grid-connected photovoltaic air conditioning mode, the default conversion efficiency algorithm is n=Pw/Pi；
When the mode of operation is grid-connected photovoltaic air-conditioning and is n=Pw/ (Pi+ with power mode, the default conversion efficiency algorithm
P0)；
When the mode of operation is pattern of generating electricity by way of merging two or more grid systems, the default conversion efficiency algorithm is n, n=P0/Pi；
It with power mode, the default conversion efficiency algorithm is n=Pw/P0 to be when the mode of operation；
When the mode of operation is off-network PV air-conditioner and is n=Pw/Pi+Pb with power mode, the default conversion efficiency algorithm；
When the mode of operation is off-network PV air-conditioner and power generation mode, the default conversion efficiency algorithm be n=(Pw+Pb)/
Pi；
When the mode of operation is off-network PV air-conditioner pattern, the default conversion efficiency algorithm is n=Pw/Pb；
When the mode of operation is energy storage pattern, the default conversion efficiency algorithm is n=Pb/Pi,
Wherein, P0 is absolute value of the air-conditioning to network system input power, and Pw is operation of air conditioner performance number, and Pi carries for photovoltaic
For performance number, Pb provides the absolute value of power for the air-conditioning to energy storage device.
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| CN110445145A (en) * | 2019-08-26 | 2019-11-12 | 珠海格力电器股份有限公司 | Control method and device, the photovoltaic apparatus system of plant capacity |
| CN111273109A (en) * | 2020-03-18 | 2020-06-12 | 珠海格力电器股份有限公司 | Energy conversion efficiency testing method and device and power utilization system |
| CN111273109B (en) * | 2020-03-18 | 2021-03-12 | 珠海格力电器股份有限公司 | Energy conversion efficiency testing method and device and power utilization system |
| CN112467794A (en) * | 2020-11-25 | 2021-03-09 | 珠海格力电器股份有限公司 | Photovoltaic air conditioner power supply system and power supply method thereof |
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