CN106374833B - Inefficient recognition methods, equipment and the system of photovoltaic plant device - Google Patents
Inefficient recognition methods, equipment and the system of photovoltaic plant device Download PDFInfo
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- CN106374833B CN106374833B CN201510434092.9A CN201510434092A CN106374833B CN 106374833 B CN106374833 B CN 106374833B CN 201510434092 A CN201510434092 A CN 201510434092A CN 106374833 B CN106374833 B CN 106374833B
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Abstract
The present invention provides a kind of inefficient recognition methods, equipment and the system of photovoltaic plant device, which includes：Obtain the information about power of each device under the submatrix of power station；According to the information about power of each device, judge whether the information about power of each device meets pre-set inefficient judgment condition, at least one first device for wherein meeting the inefficient judgment condition is determined as less efficient device, the inefficient judgment condition is that the symmetry coefficient of device is less than preconfigured symmetry coefficient threshold value, and continue preset first duration, it is compared by the actually detected information about power and preset condition of device, to quickly orient device inefficient in power station, it can fast and effectively investigate and handle less efficient device.
Description
Technical field
The present embodiments relate to photovoltaic plant detection technique more particularly to a kind of inefficient identification sides of photovoltaic plant device
Method, equipment and system.
Background technology
Currently, photovoltaic plant area gradually becomes wide, the device in each power station is numerous, and the amount of especially inverter and string formation is non-
Chang great.From the point of view of the power station of a 10MW, needs the inversion tolerance of 28kw to reach more than 3800,5 string groups are connect with an inverter
String calculates, and corresponding string formation quantity is between 1.5 ten thousand~20,000.Failure or inefficient if there is device, can directly result in
The operation benefits in power station decline, therefore during operation, inefficient or failure the inverter of effective fixation and recognition one or
String formation, and the less efficient device to identifying safeguard it is particularly important.
However, because inverter or the substantial amounts of string formation, and the whether low of device cannot be viewed from surface
Effect, therefore how to carry out positioning and identification to the inefficient or defective device in photovoltaic plant is technology to be solved by this invention
Problem.
Invention content
Inefficient recognition methods, equipment and the system of photovoltaic plant device provided in an embodiment of the present invention, for photovoltaic electric
Inefficient or defective device in standing is positioned and is identified.
First aspect of the embodiment of the present invention provides a kind of inefficient recognition methods of photovoltaic plant device, including：
Obtain the information about power of each device under the submatrix of power station；
According to the information about power of each device, judges whether the information about power of each device meets and pre-set inefficient sentence
At least one first device for wherein meeting the inefficient judgment condition is determined as less efficient device by certainly condition；
Wherein, the inefficient judgment condition is less than preconfigured symmetry coefficient threshold value for the symmetry coefficient of device, and
Continue preset first duration.
Second aspect of the embodiment of the present invention provides a kind of data processing server, including：
Acquisition module, the information about power for obtaining each device under the submatrix of power station；
It is pre- to judge whether the information about power of each device meets for the information about power according to each device for processing module
At least one first device for wherein meeting the inefficient judgment condition is determined as inefficient device by the inefficient judgment condition being first arranged
Part；
Wherein, the inefficient judgment condition is less than preconfigured symmetry coefficient threshold value for the symmetry coefficient of device, and
Continue preset first duration.
The third aspect of the embodiment of the present invention provides a kind of inefficient identifying system of photovoltaic plant device, including：It is at least one
Data processing server described in power station submatrix, data collector and second aspect；Each power station submatrix and the data collector
It is connected by data line；The data collector is connect with the data processing server by data line；
The data collector is used to acquire the information about power of each device under the power station submatrix, and by each device
Information about power be sent to the data processing server；
The data processing server is used for：
Receive the information about power of each device under the power station submatrix of the data collector transmission of photovoltaic plant；
According to the information about power of each device, judges whether the information about power of each device meets and pre-set inefficient sentence
At least one first device for wherein meeting the inefficient judgment condition is determined as less efficient device by certainly condition；Wherein, described low
It imitates the symmetry coefficient that judgment condition is device and is less than preconfigured symmetry coefficient threshold value, and continue preset first duration.
Inefficient recognition methods, equipment and the system of photovoltaic plant device provided in an embodiment of the present invention, it is real-time by obtaining
The information about power of each device under the power station submatrix of detection；According to the information about power of each device, the electricity of each device is judged
Whether amount information meets pre-set inefficient judgment condition, will wherein meet at least one the first of the inefficient judgment condition
Device is determined as less efficient device, and the inefficient judgment condition is that the symmetry coefficient of device is less than preconfigured symmetry coefficient thresholding
Value, and continue preset first duration, it is compared by the actually detected information about power and preset condition of device, to
Device inefficient in power station quickly is oriented, can fast and effectively investigate and handle less efficient device.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Some bright embodiments for those of ordinary skill in the art without having to pay creative labor, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is that the data of photovoltaic plant of the present invention acquire physics networking schematic diagram；
Fig. 2 is the flow chart of the inefficient recognition methods embodiment one of photovoltaic plant device of the present invention；
Fig. 3 is the flow chart of the inefficient recognition methods embodiment two of photovoltaic plant device of the present invention；
Fig. 4 a are the flow chart of the inefficient recognition methods embodiment three of photovoltaic plant device of the present invention；
Fig. 4 b are the inefficient assessment result schematic diagram of string type inverter；
Fig. 5 a are the flow chart of the inefficient recognition methods example IV of photovoltaic plant device of the present invention；
Fig. 5 b are the inefficient assessment result schematic diagram of centralized inverter；
Fig. 6 a are the flow chart of the inefficient recognition methods embodiment five of photovoltaic plant device of the present invention；
Fig. 6 b are the inefficient assessment result schematic diagram of string formation；
Fig. 7 is the structural schematic diagram of data processing server embodiment one of the present invention；
Fig. 8 is the configuration diagram of the inefficient identifying system embodiment one of photovoltaic plant device of the present invention.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Fig. 1 is that the data of photovoltaic plant of the present invention acquire physics networking schematic diagram, as shown in Figure 1, in a common light
In overhead utility, arrange net including at least physics shown in figure, including：At least one photovoltaic string formation, by direct current conflux case with it is inverse
Becoming device connection, multiple inverters in the same submatrix are become by cable and case to be connected, and a submatrix is collectively constituted, and in power station
In include at least a submatrix, each submatrix connect by cable with booster stations respectively, booster stations be connected to boost it is grid-connected in
Realize power supply.In addition, the inverter of each submatrix and case change are connect by data line with data collector, data acquisition
Device is connect by data line with data processing server, and the physics networking of photovoltaic plant is collectively constituted.
Wherein, cable indicates that the grid-connected flowing through channel of electric current, data line refer to gathered data flowing through channel.
Fig. 2 is the flow chart of the inefficient recognition methods embodiment one of photovoltaic plant device of the present invention, as shown in Fig. 2, upper
On the basis of stating networking shown in FIG. 1, the executive agent of the program is data processing server, and concrete implementation step is：
S101：Obtain the information about power of each device under the submatrix of power station.
In the present embodiment, the device in the submatrix of power station includes inverter, string formation etc..Data processing server obtains power station
The process of the information about power of each device is also referred to as gatherer process in submatrix, and the information about power of inverter can be handled with inverter
To and be reported to data collector, data collector to be reported to data processing server, the current information acquisition mode of string formation again
Including at least following two：(1) information about power of string type inverter, string formation directly can be acquired by inverter and be reported；(2) collect
Chinese style inverter, string formation information about power need to acquire by direct current conflux case and be reported to inverter, then be transferred to number by inverter
According to processing server.
S102：According to the information about power of each device, it is pre-set to judge whether the information about power of each device meets
At least one first device for wherein meeting the inefficient judgment condition is determined as less efficient device by inefficient judgment condition.
In the present embodiment, the inefficient judgment condition includes that the symmetry coefficient of device is less than preconfigured symmetry coefficient
Threshold value, and continue preset first duration.For data processing server before carrying out data processing, it is suitable to need to pre-set
Inefficient judgment condition, ordinary circumstance can according to device normal work when empirical value set symmetry coefficient threshold value,
It is contemplated that cannot because of device once in a while should extraneous factor occur symmetry coefficient less than threshold value the case where be determined as it is low
Effect, therefore also need to one inefficient hold period of setting, i.e., the first above-mentioned duration, such as：One day or a few hours etc., if
The symmetry coefficient of device is less than threshold value, and continue for the first duration of setting, it is determined that the device is less efficient device.
The inefficient recognition methods of photovoltaic plant device provided in this embodiment, by obtaining under the power station submatrix detected in real time
The information about power of each device it is pre- to judge whether the information about power of each device meets according to the information about power of each device
At least one first device for wherein meeting the inefficient judgment condition is determined as inefficient device by the inefficient judgment condition being first arranged
Part is compared by the actually detected information about power and preset condition of device, inefficient in power station to quickly orient
Device, can fast and effectively investigate and handle less efficient device.
Fig. 3 is the flow chart of the inefficient recognition methods embodiment two of photovoltaic plant device of the present invention, as shown in figure 3, in Fig. 1
Physics group-network construction under, on the basis of embodiment one, the realization step of inefficient recognition methods of the invention is specially：
S201：Receive the information about power of each device under the power station submatrix of the data collector transmission of photovoltaic plant.
In the present embodiment, the information about power of each device includes：Output current, output voltage.This step is one
Kind obtains a kind of concrete mode of the information about power of each device, can also be made by sending inquiry signal to data collector
It is also a kind of realization method to obtain data collector report data, is not restricted specifically.
S202：According to the information about power of each device, it is pre-set to judge whether the information about power of each device meets
At least one first device for wherein meeting the inefficient judgment condition is determined as less efficient device by inefficient judgment condition.
S203：According to the information about power and rated power of each first device, the inefficient loss of first device is calculated
Generated energy.
In the present embodiment, be aware of be those devices occur it is inefficient after, can also be further according to known number
It is believed that the loss of breath calculating device, that is, calculate inefficient loss generated energy, by taking string formation and inverter as an example, inefficient loss power generation is introduced
The calculation of amount：
The loss value of inefficient inverter is calculated using following formula：Inefficient inverter loss generated energy=(normal under submatrix
The inverter of operation normalization electricity the inefficient inverter of average value-normalization electricity) the inefficient inverters of * specified work(
Rate；Here rated power is also referred to as installed capacity, i.e., the capacity set when installing equipment.
Inefficient string formation loss value is calculated using following formula：Inefficient string formation loss generated energy=(normal operation under inverter
String formation normalization generated energy average value-inefficient string formation normalize generated energy) the inefficient string formation installed capacitys of *；Wherein：Generated energy
((i=1~N, N are hung string formation i)=inverter input electricity * (string formation i output powers/all string formations output power) for inverter
Connect string formation quantity)；String formation i output powers=string formation i output current * string formation i output voltages；String formation normalizes generated energy=power generation
Measure (string formation i)/string formation i rated power；The input electricity of inverter=inverter exports electricity/inverter transfer efficiency.
The inefficient recognition methods of photovoltaic plant device provided in this embodiment passes through the actually detected information about power of device
It is compared with preset condition, to quickly orient device inefficient in power station, fast and effectively can investigate and handle
Less efficient device, and the electricity of inefficient loss can be calculated according to the information about power of each device.
Fig. 4 a are the flow chart of the inefficient recognition methods embodiment three of photovoltaic plant device of the present invention, as shown in fig. 4 a,
On the basis of any of the above-described embodiment, if the device is string type inverter, the information about power of each device of basis,
Judge whether the information about power of each device meets pre-set inefficient judgment condition, will wherein meet the inefficient judgement item
The specific implementation step that at least one first device of part is determined as less efficient device is：
S301：According to the information about power of each string type inverter, the symmetrical of the different inverters in same submatrix is calculated
Coefficient.
In the present embodiment, the normalization generated energy for substantially using inverter, with same power station with all in submatrix
The normalizing generated energy mean value of inverter compares, and deviates a certain range of inverter of mean value and is considered inefficient inverter.
S302：Judge whether the symmetry coefficient of each string type inverter meets pre-set inefficient judgment condition；Institute
It states the symmetry coefficient that inefficient judgment condition is string type inverter and is less than preconfigured symmetry coefficient threshold value, and persistently preset
The first duration.
In the present embodiment, the inefficient judgment condition generally considered is the symmetry coefficient of device, optionally, the inefficient judgement
Condition can also include：Under conditions of rated power is constant, the generated energy of the device is less than preconfigured generated energy door
Limit value, and continue preset second duration；And/or under conditions of rated power is constant, the normalization generated energy of the device
Less than preconfigured normalization generated energy threshold value, and continue preset third duration.Wherein threshold value and time length be all
It may be set according to actual conditions.
S303：Obtain the mark of at least one first device；First device is that symmetry coefficient meets and described inefficient sentences
The certainly string type inverter of condition.
In the present embodiment, when to power station networking, each device is numbered, i.e., each device has solid
Fixed mark further includes that the mark of device and the correspondence of information about power accordingly may be used in the data that data collector reports
To obtain the mark of less efficient device.
Below as one example, illustrate this programme concrete implementation：
It can be obtained according to the installed capacity of the string formation of typing, i.e. rated power and inverter and the correspondence of string formation
To the rated power of inverter, such as：It is 5.6kw according to each string formation capacity is designed, 5 groups is hung under each string type inverter
String, then the corresponding capacity of each inverter is 28kw.And 192 string formations are hung under each centralized inverter, then corresponding installation
Capacity is 1075.2kw.
For string type inverter, a submatrix corresponds to N number of inverter, by taking 28kw string type inverters as an example, a son
Battle array corresponds to 36 inverters.In practical comparison, centralized inverter is the lateral comparison of whole progress, string type with a power station
Inverter is the lateral comparison of whole progress with a submatrix.
Set inefficient hold period, i.e. the first duration and symmetry coefficient threshold value：(1) the inefficient thresholding of inverter：30%；It is low
Imitate hold period：1 day；
The inefficient judgement of string type inverter：The inverter electricity of data storage processing server was pooled to according to the same day,
The symmetry coefficient of different inverters in same submatrix is calculated, and if meeting inefficient decision threshold, calculates corresponding inefficient damage
Lose generated energy.It can specifically be showed by report or graphics mode according to information about power and the result of calculation of calculating.
It specifically please refers to shown in the following table 1 and Fig. 4 b, Fig. 4 b are the inefficient assessment result schematic diagram of string type inverter.
The inefficient assessment result table of 1 string type inverter of table.
Shown in table 1 and Fig. 4 b, July 8,9 days, the generated energy of inverter 7, installed capacity, normalization generated energy and/or
Symmetry coefficient is all lower than other inverters very more, it is thus determined that the inverter 7 is less efficient device, and has calculated inefficient damage
The generated energy of mistake.
Fig. 5 a are the flow chart of the inefficient recognition methods example IV of photovoltaic plant device of the present invention, as shown in Figure 5 a,
On the basis of any of the above-described embodiment, if the device is centralized inverter, the information about power of each device of basis,
Judge whether the information about power of each device meets pre-set inefficient judgment condition, will wherein meet the inefficient judgement item
At least one first device of part be determined as less efficient device the specific steps are：
S401：According to the information about power of each centralized inverter, the symmetrical of the different inverters in same power station is calculated
Coefficient.
S402：Judge whether the symmetry coefficient of each centralized inverter meets pre-set inefficient judgment condition；Institute
It states the symmetry coefficient that inefficient judgment condition is centralized inverter and is less than preconfigured symmetry coefficient threshold value, and persistently preset
The first duration.
In the present embodiment, the inefficient judgment condition generally considered is the symmetry coefficient of device, optionally, the inefficient judgement
Condition can also include：Under conditions of rated power is constant, the generated energy of the device is less than preconfigured generated energy door
Limit value, and continue preset second duration；And/or under conditions of rated power is constant, the normalization generated energy of the device
Less than preconfigured normalization generated energy threshold value, and continue preset third duration.Wherein threshold value and time length be all
It may be set according to actual conditions.Its realization principle is identical as string type inverter, and one kind of inefficient inverter judgement is specific
Inefficient judgment condition is：
Condition one：Inverter symmetry coefficient is less than inefficient thresholding；
Condition two：Inverter normalizes generated energy and is less than all inverters normalization generated energy average values of submatrix；
Condition three：It is non-zero that inverter normalizes generated energy；
Wherein：(normalization generated energy is average on the day of all inverters of submatrix where inverter for inverter symmetry coefficient=1-
Generated energy is normalized on the day of value-inverter) submatrix institute inverter same day normalization generated energy average value where/inverter.
S403：Obtain the mark of at least one first device；First device is that symmetry coefficient meets and described inefficient sentences
The certainly centralized inverter of condition.
Below as one example, illustrate this programme concrete implementation：
It can be obtained according to the installed capacity of the string formation of typing, i.e. rated power and inverter and the correspondence of string formation
To the rated power of inverter, such as：It is 5.6kw according to each string formation capacity is designed, 5 groups is hung under each string type inverter
String, then the corresponding capacity of each inverter is 28kw.And 192 string formations are hung under each centralized inverter, then corresponding installation
Capacity is 1075.2kw.
For centralized inverter, a submatrix corresponds to an inverter, before judgement, sets inefficient holding week first
Phase, i.e. the first duration and symmetry coefficient threshold value：(1) the inefficient thresholding of inverter：30%；(2) inefficient hold period：1 day.
The inefficient judgement of centralized inverter：Unlike string type, calculating is the different inverters in same power station
Symmetry coefficient calculate corresponding inefficient loss generated energy and if meeting inefficient decision threshold.It specifically can be according to electricity
Amount information and the result of calculation of calculating are showed by report or graphics mode.Specifically please refer to shown in the following table 2 and Fig. 5 b,
Fig. 5 b are the inefficient assessment result schematic diagram of centralized inverter.
The inefficient assessment result table of 2 centralized inverter of table.
Shown in table 2 and Fig. 5 b, July 8,9 days, the generated energy of inverter 7, installed capacity, normalization generated energy and/or
Symmetry coefficient is all lower than other inverters very more, it is thus determined that the inverter 7 is less efficient device, and has calculated inefficient damage
The generated energy of mistake.
Fig. 6 a are the flow chart of the inefficient recognition methods embodiment five of photovoltaic plant device of the present invention, as shown in Figure 6 a,
On the basis of any of the above-described embodiment, if the device is string formation, the information about power of each device of basis judges each
Whether the information about power of device meets pre-set inefficient judgment condition, will wherein meet the inefficient judgment condition at least
The specific implementation step that one the first device is determined as less efficient device is：
S501：According to the information about power of each string formation, the symmetry coefficient of the string formation under each inverter is calculated.
In the present embodiment, symmetry coefficient=1- (all string formations same day output powers of inverter where the string formation of string formation
Output power on the day of the average value-string formation) all string formations same day output power average values of inverter where the/string formation.According to upper
State the symmetry coefficient that formula calculates each string formation.
S502：Judge whether the symmetry coefficient of each string formation meets pre-set inefficient judgment condition；It is described inefficient to sentence
Certainly condition is that the symmetry coefficient of string formation is less than preconfigured symmetry coefficient threshold value, and continues preset first duration.
In the present embodiment, as centralized inverter and string type inverter, in addition to considering that symmetry coefficient setting is sentenced
The generated energy of the device can also be less than preconfigured generated energy door by certainly condition under conditions of rated power is constant
Limit value, and continue preset second duration as judgment condition；Alternatively, under conditions of rated power is constant, by the device
Normalization generated energy be less than preconfigured normalization generated energy threshold value, and continue preset third duration as judgement item
Part.A kind of judgment condition of specific inefficient string formation can be：
Condition one：String formation symmetry coefficient is less than inefficient thresholding；
Condition two：String formation output power is less than all string formation output power average values of inverter；
Condition three：String formation installed capacity is non-zero, i.e., the string formation is linked into inverter；
Wherein：String formation symmetry coefficient=1- (all string formations same day output power average value-groups of inverter where the string formation
String same day output power) all string formations same day output power average values of inverter where the/string formation；
Output power=(voltage of the electric current * sampled points 1 of sampled point 1) on the day of all string formations of inverter where the string formation
+ ... (sampled point N electric current * sampled point N voltages)；Note：Wherein N is the total number of sample points on the same day.
S503：Obtain the mark of at least one first device；First device is that symmetry coefficient meets and described inefficient sentences
The certainly string formation of condition.
Below as one example, illustrate this programme concrete implementation：Firstly the need of the setting inefficient thresholding of string formation based on experience value
(i.e. the symmetry coefficient threshold value of string formation)：30%；Inefficient hold period (the first duration)：1 day, for each string formation：According to working as
It is pooled to the inverter electricity of data processing server, the electric current of transfer efficiency and each string formation, information of voltage, calculates every
The symmetry coefficient of string formation under a inverter, and if meeting inefficient decision threshold, calculate corresponding inefficient loss generated energy.
This calculates centralization and is not different with string type inverter.It specifically please refers to shown in the following table 3 and Fig. 6 b, Fig. 6 b are the low of string formation
Imitate assessment result schematic diagram.
Shown in table 3 and Fig. 6 b, July 8,9 days, general power, normalization generated energy and/or the symmetry coefficient of string formation 6 were all
It is lower than other string formations very more, it is thus determined that the string formation 6 is less efficient device, and calculate the generated energy of inefficient loss.
The inefficient assessment result table of 3 string formation of table.
The inefficient recognition methods for specific type of device that above-mentioned several embodiments provide, passes through the actually detected of device
Information about power compared with preset condition, can be fast and effectively to quickly orienting device inefficient in power station
Less efficient device is investigated and handled, to reduce the loss that less efficient device is brought, improves the income in power station, and can be calculated every
The electricity of a less efficient device loss.
Fig. 7 is the structural schematic diagram of data processing server embodiment one of the present invention, as shown in fig. 7, the data processing takes
Business device 10, also referred to as data storage processing server comprising：Acquisition module 11 and processing module 12；Wherein, acquisition module
11, the information about power for obtaining each device under the submatrix of power station；Processing module 12, for being believed according to the electricity of each device
Breath, judges whether the information about power of each device meets pre-set inefficient judgment condition, will wherein meet and described inefficient sentence
Certainly at least one first device of condition is determined as less efficient device；
Wherein, the inefficient judgment condition is less than preconfigured symmetry coefficient threshold value for the symmetry coefficient of device, and
Continue preset first duration.
Optionally, the processing module 12 is additionally operable to information about power and rated power according to each first device, calculates
The inefficient loss generated energy of first device；
The acquisition module 11 (i.e. receiving module) is specifically used for receiving the power station that the data collector of photovoltaic plant is sent
The information about power of each device under submatrix；The information about power of each device includes：Output current, output voltage.
Optionally, when the device is string type inverter, then the processing module 12 is specifically used for：
According to the information about power of each string type inverter, the symmetry coefficient of the different inverters in same submatrix is calculated；
Judge whether the symmetry coefficient of each string type inverter meets pre-set inefficient judgment condition；It is described inefficient
Judgment condition is that the symmetry coefficient of string type inverter is less than preconfigured symmetry coefficient threshold value, and continues preset first
Duration；
Obtain the mark of at least one first device；First device is that symmetry coefficient meets the inefficient judgment condition
String type inverter.
Optionally, when the device is centralized inverter, then the processing module is specifically used for：
According to the information about power of each centralized inverter, the symmetry coefficient of the different inverters in same power station is calculated；
Judge whether the symmetry coefficient of each centralized inverter meets pre-set inefficient judgment condition；It is described inefficient
Judgment condition is that the symmetry coefficient of centralized inverter is less than preconfigured symmetry coefficient threshold value, and continues preset first
Duration；
Obtain the mark of at least one first device；First device is that symmetry coefficient meets the inefficient judgment condition
Centralized inverter.
Optionally, when the device is string formation, then the processing module is specifically used for：
According to the information about power of each string formation, the symmetry coefficient of the string formation under each inverter is calculated；
Judge whether the symmetry coefficient of each string formation meets pre-set inefficient judgment condition；The inefficient judgment condition
It is less than preconfigured symmetry coefficient threshold value for the symmetry coefficient of string formation, and continues preset first duration.
Obtain the mark of at least one first device；First device is that symmetry coefficient meets the inefficient judgment condition
String formation.
Data processing server provided in this embodiment, for execute Fig. 1 to Fig. 6 b it is any shown in embodiment of the method
Technical solution, implementing principle and technical effect are similar, by the actually detected information about power of device and preset condition into
Row comparison can be investigated fast and effectively to quickly orient device inefficient in power station and handle less efficient device, to
The loss that less efficient device is brought is reduced, the income in power station is improved.
Fig. 8 is the configuration diagram of the inefficient identifying system embodiment one of photovoltaic plant device of the present invention, as shown in figure 8,
The system only includes the part in Fig. 1, includes specifically：Shown at least one power station submatrix 20, data collector 30 and Fig. 7
Data processing server 10；Each power station submatrix 20 is connect with the data collector 30 by data line；The number
It is connect by data line with the data processing server 10 according to collector 30；
The data collector 30 is used to acquire the information about power of each device under the power station submatrix, and by each device
The information about power of part is sent to the data processing server；
The data processing server 10 is used for：
Receive the information about power of each device under the power station submatrix of the data collector transmission of photovoltaic plant；
According to the information about power of each device, judges whether the information about power of each device meets and pre-set inefficient sentence
At least one first device for wherein meeting the inefficient judgment condition is determined as less efficient device by certainly condition；Wherein, described low
It imitates the symmetry coefficient that judgment condition is device and is less than preconfigured symmetry coefficient threshold value, and continue preset first duration.
The inefficient identifying system of photovoltaic plant device provided in this embodiment, for execute Fig. 1 to Fig. 6 b it is any shown in
The technical solution of embodiment of the method, implementing principle and technical effect are similar, and details are not described herein.
In the embodiment of above-mentioned data processing server, it should be appreciated that acquisition module can be realized by receiver, be located
Reason module can realize that the processor can be central processing unit (English by processor：Central Processing
Unit, referred to as：CPU), it can also be other general processors, digital signal processor (English：Digital Signal
Processor, referred to as：DSP), application-specific integrated circuit (English：Application Specific Integrated
Circuit, referred to as：ASIC) etc..General processor can be microprocessor or the processor can also be any conventional place
Manage device etc..The step of method in conjunction with disclosed in the embodiment of the present invention, can be embodied directly in hardware processor and execute completion, or
Hardware and software module combination in person's processor execute completion.
One of ordinary skill in the art will appreciate that：Realize that all or part of step of above-mentioned each method embodiment can lead to
The relevant hardware of program instruction is crossed to complete.Program above-mentioned can be stored in a computer read/write memory medium.The journey
When being executed, execution includes the steps that above-mentioned each method embodiment to sequence；And storage medium above-mentioned includes：ROM, RAM, magnetic disc or
The various media that can store program code such as person's CD.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that：Its according to
So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into
Row equivalent replacement；And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of inefficient recognition methods of photovoltaic plant device, which is characterized in that including：
Obtain the information about power of each device under the submatrix of power station；
According to the information about power of each device, judge whether the information about power of each device meets pre-set inefficient judgement item
At least one device for wherein meeting the inefficient judgment condition is determined as the first device by part；First device is
Less efficient device；
Wherein, the inefficient judgment condition is that the symmetry coefficient of device is less than preconfigured symmetry coefficient threshold value, and continues
Preset first duration；The device includes the string formation under inverter or inverter；
Symmetry coefficient=1- of the inverter (normalizes generated energy average value-on the day of all inverters of submatrix where inverter
Generated energy is normalized on the day of inverter) submatrix institute inverter same day normalization generated energy average value where/inverter；
Symmetry coefficient=1- (all string formations same day output power average value-string formations of inverter where the string formation of the string formation
Same day output power) all string formations same day output power average values of inverter where the/string formation.
2. according to the method described in claim 1, it is characterized in that, the method further includes：
According to the information about power and rated power of each first device, the inefficient loss generated energy of first device is calculated.
3. according to the method described in claim 2, it is characterized in that, the electricity letter for obtaining each device under the submatrix of power station
Breath includes：
Receive the information about power of each device under the power station submatrix of the data collector transmission of photovoltaic plant；Each device
Information about power include：Output current, output voltage.
4. according to the method described in claim 2, it is characterized in that, the inverter is string type inverter, then the basis
The information about power of each device, judges whether the information about power of each device meets pre-set inefficient judgment condition, by it
The middle at least one device for meeting the inefficient judgment condition is determined as the first device, including：
According to the information about power of each string type inverter, the symmetric system of the different string type inverters in same submatrix is calculated
Number；
Judge whether the symmetry coefficient of each string type inverter meets pre-set inefficient judgment condition；The inefficient judgement
Condition be string type inverter symmetry coefficient be less than preconfigured symmetry coefficient threshold value, and continue preset first when
It is long；
Obtain the mark of at least one first device；First device is the group that symmetry coefficient meets the inefficient judgment condition
String inverter.
5. according to the method described in claim 2, it is characterized in that, the inverter is centralized inverter, then the basis
The information about power of each device, judges whether the information about power of each device meets pre-set inefficient judgment condition, by it
The middle at least one device for meeting the inefficient judgment condition is determined as the first device, including：
According to the information about power of each centralized inverter, the symmetric system of the different centralized inverters in same power station is calculated
Number；
Judge whether the symmetry coefficient of each centralized inverter meets pre-set inefficient judgment condition；The inefficient judgement
Condition be centralized inverter symmetry coefficient be less than preconfigured symmetry coefficient threshold value, and continue preset first when
It is long；
Obtain the mark of at least one first device；First device is the collection that symmetry coefficient meets the inefficient judgment condition
Chinese style inverter.
6. according to the method described in claim 2, it is characterized in that, the device is the string formation under inverter, then the basis
The information about power of each device, judges whether the information about power of each device meets pre-set inefficient judgment condition, by it
The middle at least one device for meeting the inefficient judgment condition is determined as the first device, including：
According to the information about power of each string formation, the symmetry coefficient of the string formation under each inverter is calculated；
Judge whether the symmetry coefficient of each string formation meets pre-set inefficient judgment condition；The inefficient judgment condition is group
The symmetry coefficient of string is less than preconfigured symmetry coefficient threshold value, and continues preset first duration；
Obtain the mark of at least one first device；First device is the group that symmetry coefficient meets the inefficient judgment condition
String.
7. method according to any one of claims 1 to 3, which is characterized in that the inefficient judgment condition further includes：
Under conditions of rated power is constant, the generated energy of the device is less than preconfigured generated energy threshold value, and continues
Preset second duration；Alternatively,
Under conditions of rated power is constant, the normalization generated energy of the device is less than preconfigured normalization generated energy door
Limit value, and continue preset third duration.
8. a kind of data processing server, which is characterized in that including：
Acquisition module, the information about power for obtaining each device under the submatrix of power station；
Processing module judges whether the information about power of each device meets and sets in advance for the information about power according to each device
At least one device for wherein meeting the inefficient judgment condition is determined as the first device by the inefficient judgment condition set；
First device is less efficient device；
Wherein, the inefficient judgment condition is that the symmetry coefficient of device is less than preconfigured symmetry coefficient threshold value, and continues
Preset first duration；The device includes the string formation under inverter or inverter；
Symmetry coefficient=1- of the inverter (normalizes generated energy average value-on the day of all inverters of submatrix where inverter
Generated energy is normalized on the day of inverter) submatrix institute inverter same day normalization generated energy average value where/inverter；
Symmetry coefficient=1- (all string formations same day output power average value-string formations of inverter where the string formation of the string formation
Same day output power) all string formations same day output power average values of inverter where the/string formation.
9. server according to claim 8, which is characterized in that the processing module is additionally operable to according to each first device
Information about power and rated power, calculate the inefficient loss generated energy of first device；
The acquisition module is specifically used for receiving each device under the power station submatrix of the data collector transmission of photovoltaic plant
Information about power；The information about power of each device includes：Output current, output voltage.
10. a kind of inefficient identifying system of photovoltaic plant device, which is characterized in that including：At least one power station submatrix, data are adopted
Storage and the data processing server of claim 8 or 9；Each power station submatrix passes through data transmission with the data collector
Line connects；The data collector is connect with the data processing server by data line；
The data collector is used to acquire the information about power of each device under the power station submatrix, and by the electricity of each device
Amount information is sent to the data processing server；
The data processing server is used for：
Receive the information about power of each device under the power station submatrix of the data collector transmission of photovoltaic plant；
According to the information about power of each device, judge whether the information about power of each device meets pre-set inefficient judgement item
At least one device for wherein meeting the inefficient judgment condition is determined as the first device by part；First device is
Less efficient device；
Wherein, the inefficient judgment condition is that the symmetry coefficient of device is less than preconfigured symmetry coefficient threshold value, and continues
Preset first duration；The device includes the string formation under inverter or inverter；
Symmetry coefficient=1- of the inverter (normalizes generated energy average value-on the day of all inverters of submatrix where inverter
Generated energy is normalized on the day of inverter) submatrix institute inverter same day normalization generated energy average value where/inverter；
Symmetry coefficient=1- (all string formations same day output power average value-string formations of inverter where the string formation of the string formation
Same day output power) all string formations same day output power average values of inverter where the/string formation.
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| CN107086857B (en) * | 2017-06-09 | 2023-09-22 | 上海历挚机电设备有限公司 | Photovoltaic power station monitoring system and method |
| CN112782495A (en) * | 2019-11-06 | 2021-05-11 | 成都鼎桥通信技术有限公司 | String abnormity identification method for photovoltaic power station |
| CN111835283B (en) * | 2020-06-30 | 2024-01-26 | 文庭荣 | Instrument and equipment for searching photovoltaic power station low-efficiency components |
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| CN102338851B (en) * | 2011-09-28 | 2013-06-26 | 东北大学 | Plug and play detecting device for photovoltaic power generation grid-connected system |
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