CN106374833A - Low efficiency identification method, device and system of devices of photovoltaic power station - Google Patents
Low efficiency identification method, device and system of devices of photovoltaic power station Download PDFInfo
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- CN106374833A CN106374833A CN201510434092.9A CN201510434092A CN106374833A CN 106374833 A CN106374833 A CN 106374833A CN 201510434092 A CN201510434092 A CN 201510434092A CN 106374833 A CN106374833 A CN 106374833A
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Abstract
The invention provides a low efficiency identification method, device and system of devices of a photovoltaic power station. The identification method comprises the following steps: obtaining electric quantity information of each device under a power station submatrix; and according to the electric quantity information of each device, determining whether the electric quantity information of each device satisfies a low efficiency determining condition set in advance, and determining at least one first device satisfying the low efficiency determining condition as a low-efficiency device, wherein the low efficiency determining condition is that a symmetry coefficient of the devices is smaller than a symmetry coefficient threshold configured in advance and a preset first time length and the device lasts for a preset first time length. According to the invention, through comparing actually detected electric quantity information of the devices with the preset condition, low-efficiency devices are rapidly positioned, and the low-efficiency devices can be rapidly and effectively checked and processed.
Description
Technical field
The present embodiments relate to photovoltaic plant detection technique, more particularly, to a kind of photovoltaic plant device low
Effect recognition methodss, equipment and system.
Background technology
At present, photovoltaic plant area gradually becomes wide, and the device in each power station is numerous, especially inverter with
The amount of group string is very big.From the point of view of the power station of a 10mw, the inversion tolerance of 28kw is needed to reach 3800
Multiple, 5 string group strings are connect with an inverter and calculates, its corresponding group of string quantity is between 1.5 ten thousand～20,000.
Fault if there is device or poorly efficient, the operation benefits that can directly result in power station decline, therefore in fortune
During battalion, effective fixation and recognition one is poorly efficient or the inverter of fault or group string, and to identifying
Less efficient device carry out safeguarding particularly important.
However, because the substantial amounts of inverter or group string, and device can not be viewed from surface
Whether poorly efficient, therefore how the poorly efficient or defective device in photovoltaic plant is positioned and identification is
The technical problem to be solved.
Content of the invention
The poorly efficient recognition methodss of photovoltaic plant device provided in an embodiment of the present invention, equipment and system, are used for
Poorly efficient or defective device in photovoltaic plant is positioned and is identified.
Embodiment of the present invention first aspect provides a kind of poorly efficient recognition methodss of photovoltaic plant device, comprising:
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 and pre-set
Poorly efficient judgment condition, at least one first device wherein being met described poorly efficient judgment condition is defined as
Less efficient device；
Wherein, described poorly efficient judgment condition is the symmetry coefficient of device less than the symmetry coefficient door being pre-configured with
Limit value, and continue default first duration.
Embodiment of the present invention second aspect provides a kind of data processing server, comprising:
Acquisition module, for obtaining the information about power of each device under the submatrix of power station；
Processing module, for the information about power according to each device, judges that the information about power of each device is
The poorly efficient judgment condition that no satisfaction pre-sets, wherein met described poorly efficient judgment condition at least one
First device is defined as less efficient device；
Wherein, described poorly efficient judgment condition is the symmetry coefficient of device less than the symmetry coefficient door being pre-configured with
Limit value, and continue default first duration.
The embodiment of the present invention third aspect provides a kind of poorly efficient identifying system of photovoltaic plant device, comprising:
At least one power station submatrix, data acquisition unit and data processing server described in second aspect；Each power station
Submatrix is connected by data line with described data acquisition unit；At described data acquisition unit and described data
Reason server is connected by data line；
Described data acquisition unit is used for gathering the information about power of each device under the submatrix of described power station, and will
The information about power of each device is sent to described data processing server；
Described data processing server is used for:
Receive the information about power of each device under the power station submatrix of data acquisition unit transmission of photovoltaic plant；
According to the information about power of each device, judge whether the information about power of each device meets and pre-set
Poorly efficient judgment condition, at least one first device wherein being met described poorly efficient judgment condition is defined as
Less efficient device；Wherein, described poorly efficient judgment condition is symmetrical less than be pre-configured with for the symmetry coefficient of device
Coefficient threshold value, and continue default first duration.
The poorly efficient recognition methodss of photovoltaic plant device provided in an embodiment of the present invention, equipment and system, pass through
Obtain the information about power of each device under the power station submatrix of real-time detection；Electricity letter according to each device
Breath, judges whether the information about power of each device meets the poorly efficient judgment condition pre-setting, by its fullness in the epigastrium and abdomen
At least one first device of the described poorly efficient judgment condition of foot is defined as less efficient device, described poorly efficient judgement bar
Part is that the symmetry coefficient of device is less than the symmetry coefficient threshold value being pre-configured with, and when continuing default first
Long, contrasted by the actually detected information about power of device and default condition, thus quickly positioning
Go out poorly efficient device in power station, can fast and effectively investigate and process less efficient device.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
The accompanying drawing applying required use in example or description of the prior art be briefly described it should be apparent that, under
Accompanying drawing in the description of face is some embodiments of the present invention, for those of ordinary skill in the art,
On the premise of not paying creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the data acquisition physics networking schematic diagram of photovoltaic plant of the present invention；
Fig. 2 is the flow chart of the poorly efficient recognition methodss embodiment one of photovoltaic plant device of the present invention；
Fig. 3 is the flow chart of the poorly efficient recognition methodss embodiment two of photovoltaic plant device of the present invention；
Fig. 4 a is the flow chart of the poorly efficient recognition methodss embodiment three of photovoltaic plant device of the present invention；
Fig. 4 b is the poorly efficient assessment result schematic diagram of group string inverter；
Fig. 5 a is the flow chart of the poorly efficient recognition methodss example IV of photovoltaic plant device of the present invention；
Fig. 5 b is the poorly efficient assessment result schematic diagram of centralized inverter；
Fig. 6 a is the flow chart of the poorly efficient recognition methodss embodiment five of photovoltaic plant device of the present invention；
Fig. 6 b is the poorly efficient assessment result schematic diagram of group string；
Fig. 7 is the structural representation of data processing server embodiment one of the present invention；
Fig. 8 is the configuration diagram of the poorly efficient identifying system embodiment one of photovoltaic plant device of the present invention.
Specific embodiment
Purpose, technical scheme and advantage for making the embodiment of the present invention are clearer, below in conjunction with this
Accompanying drawing in bright embodiment, is clearly and completely described to the technical scheme in the embodiment of the present invention,
Obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained under the premise of not making creative work
The every other embodiment obtaining, broadly falls into the scope of protection of the invention.
Fig. 1 is the data acquisition physics networking schematic diagram of photovoltaic plant of the present invention, as shown in figure 1, one
In individual common photovoltaic plant, at least include the physics shown in figure and arrange net, comprising: at least one photovoltaic
Group is gone here and there, is connected with inverter by direct current conflux case, and the multiple inverters in same submatrix pass through cable
Become with case and be connected, collectively constitute a submatrix, and at least include a submatrix in power station, each submatrix
It is connected with booster stations by cable respectively, booster stations are being connected to the grid-connected middle realization power supply of boosting.In addition,
The inverter of each submatrix and case change are connected with data acquisition unit by data line, data acquisition unit
It is connected with data processing server by data line, collectively constitute the physics networking of photovoltaic plant.
Wherein, cable represents the grid-connected flowing through channel of electric current, and data line refers to gathered data flowing through channel.
Fig. 2 is the flow chart of the poorly efficient recognition methodss embodiment one of photovoltaic plant device of the present invention, such as Fig. 2
Shown, on the basis of the networking shown in above-mentioned Fig. 1, the executive agent of the program is data processing service
Device, 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, group string etc..Data processing service
The process that device obtains the information about power of each device in the submatrix of power station is also referred to as gatherer process, the electricity of inverter
Amount information can be processed with inverter and obtain and be reported to data acquisition unit, and data acquisition unit is reported to data again
Processing server, the current information acquisition mode that group is gone here and there at least includes following two: the string data inversion of (1) group
Device, the information about power of group string directly can be gathered by inverter and report；(2) centralized inverter, group string
Information about power need to gather through direct current conflux case and report inverter, then is transferred to data by inverter
Reason server.
S102: according to the information about power of each device, judge whether the information about power of each device meets pre-
The poorly efficient judgment condition first arranging, is wherein met at least one first device of described poorly efficient judgment condition
It is defined as less efficient device.
In the present embodiment, described poorly efficient judgment condition includes the symmetry coefficient of device and is less than and is pre-configured with
Symmetry coefficient threshold value, and continue default first duration.Data processing server is carrying out data processing
Before, need to pre-set suitably poorly efficient judgment condition, ordinary circumstance can be according to device in normal work
Empirical value when making sets symmetry coefficient threshold value, it is contemplated that can not once in a while should be outward because of device
Symmetry coefficient and is less than the situation of threshold value being determined as poorly efficient in boundary's factor, therefore also needs to set one
Poorly efficient hold period, i.e. the first above-mentioned duration, for example: one day or a few hours etc., if device
Symmetry coefficient is less than threshold value, and continue for the first duration setting it is determined that this device is as poorly efficient device
Part.
The poorly efficient recognition methodss of the photovoltaic plant device that the present embodiment provides, by obtaining the electricity of real-time detection
The information about power of each device under submatrix of standing, according to the information about power of each device, judges each device
Information about power whether meet the poorly efficient judgment condition pre-setting, will wherein meet described poorly efficient judgement bar
At least one of part first device is defined as less efficient device, by the actually detected information about power of device with
Default condition is contrasted, thus quickly orienting poorly efficient device in power station, can quickly, effectively
Investigate and process less efficient device.
Fig. 3 is the flow chart of the poorly efficient recognition methodss embodiment two of photovoltaic plant device of the present invention, such as Fig. 3
Shown, under the physics group-network construction of Fig. 1, on the basis of embodiment one, the poorly efficient identification of the present invention
Method realize step particularly as follows:
S201: receive the electricity of each device under the power station submatrix of data acquisition unit transmission of photovoltaic plant
Information.
In the present embodiment, the information about power of each device described includes: output current, output voltage.
This step is a kind of a kind of concrete mode of the information about power obtaining each device, can also be by data
Harvester sends inquiry signal so that data acquisition unit report data is also a kind of implementation, specifically not
It is restricted.
S202: according to the information about power of each device, judge whether the information about power of each device meets pre-
The poorly efficient judgment condition first arranging, is wherein met at least one first device of described poorly efficient judgment condition
It is defined as less efficient device.
S203: the information about power according to each the first device and rated power, calculate described first device
Poorly efficient loss generated energy.
In the present embodiment, be aware of be those devices occur poorly efficient after, can also basis further
The loss of known data message calculating device, that is, calculate poorly efficient loss generated energy, to organize string and inverter
As a example, introduce poorly efficient loss generated energy calculation:
The loss value of poorly efficient inverter adopts equation below to calculate: poorly efficient inverter loses generated energy=(submatrix
The normalization electricity of the lower normal meansigma methodss-poorly efficient inverter of the normalization electricity of inverter running) * is low
The rated power of effect inverter；Here rated power is also referred to as installed capacity, sets in the equipment of installation
Fixed capacity.
Poorly efficient group of string loss value adopts equation below to calculate: poorly efficient group of string loss generated energy=(under inverter just
The group string normalization generated energy meansigma methodss-poorly efficient group string normalization generated energy often running) poorly efficient group of machine in tandem of *
Capacity；Wherein: generated energy (group string i)=inverter input electricity * (group string i output/all groups of strings
Output) (i=1～n, n are inverter mounting group string quantity)；Group string i output=group string i
Output current * group string i output voltage；Group string normalization generated energy=generated energy (group string i)/group string i volume
Determine power；The input electricity of inverter=inverter output electricity/inverter conversion efficiency.
The poorly efficient recognition methodss of the photovoltaic plant device that the present embodiment provides, actually detected by device
Information about power is contrasted with default condition, thus quickly orienting poorly efficient device in power station, permissible
Fast and effectively investigate and process less efficient device, and can be calculated according to the information about power of each device low
The electricity of effect loss.
Fig. 4 a is the flow chart of the poorly efficient recognition methodss embodiment three of photovoltaic plant device of the present invention, such as Fig. 4 a
Shown, on the basis of any of the above-described embodiment, if described device is group string inverter, described
According to the information about power of each device, judge whether the information about power of each device meets pre-set poorly efficient
Judgment condition, at least one first device wherein being met described poorly efficient judgment condition is defined as poorly efficient device
The step that implements of part is:
S301: according to the information about power of each group string inverter, calculate the different inversions in same submatrix
The symmetry coefficient of device.
In the present embodiment, the normalization generated energy of inverter, the same submatrix with same power station are substantially adopted
The normalizing generated energy average of interior all inverters compares, and deviates a range of inverter of average and thinks
It is poorly efficient inverter.
S302: judge whether the symmetry coefficient of each group string inverter meets the poorly efficient judgement pre-setting
Condition；Described poorly efficient judgment condition is that the symmetry coefficient of group string inverter is less than the symmetric system being pre-configured with
Number threshold value, and continue default first duration.
In the present embodiment, the poorly efficient judgment condition of general consideration is the symmetry coefficient of device, optionally,
This poorly efficient judgment condition can also include: under conditions of rated power is constant, the generated energy of described device
Less than the generated energy threshold value being pre-configured with, and continue default second duration；And/or, in rated power
Under conditions of constant, the normalization generated energy of described device is less than the normalization generated energy thresholding being pre-configured with
Value, and continue default 3rd duration.Wherein threshold value and time length can set according to practical situation
Fixed.
S303: obtain the mark of at least one the first device；Described first device meets institute for symmetry coefficient
State the group string inverter of poorly efficient judgment condition.
In the present embodiment, when to power station networking, each device is numbered, that is, each
Device has fixing mark, also includes in the data that data acquisition unit reports, the mark of device with electricity
The corresponding relation of amount information, can obtain the mark of less efficient device accordingly.
Below as one example, this programme concrete implementation is described:
Can be right with what group was gone here and there according to the installed capacity of the group string of typing, i.e. rated power, and inverter
The rated power obtaining inverter should be related to, for example: go here and there capacity for 5.6kw according to designing each group, often
5 group strings are hung, then the corresponding capacity of each inverter is 28kw under individual group of string inverter.And each collection
192 group strings are hung, then corresponding installed capacity is 1075.2kw under Chinese style inverter.
For group string inverter, a submatrix corresponds to n inverter, with 28kw group string inverter
As a example, a submatrix corresponds to 36 inverters.In actual comparison, centralized inverter is with a power station
Laterally compared for overall, group string inverter is laterally compared with a submatrix for overall.
Set poorly efficient hold period, i.e. the first duration and symmetry coefficient threshold value: the poorly efficient thresholding of (1) inverter:
30%；Poorly efficient hold period: 1 day；
The poorly efficient judgement of group string inverter: be pooled to the inversion of data storage processing server according to the same day
Device electricity, calculates the symmetry coefficient of different inverters in same submatrix, and if meets poorly efficient decision gate
Limit, calculates corresponding poorly efficient loss generated energy.Specifically can be according to information about power and the calculating calculating knot
Fruit is presented by form or graphics mode.Specifically refer to shown in table 1 below and Fig. 4 b, Fig. 4 b
For organizing the poorly efficient assessment result schematic diagram of string inverter.
The poorly efficient assessment result table of 1 group of string 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 are all low than other inverters very many, it is thus determined that this inverter 7
For less efficient device, and calculate the generated energy of poorly efficient loss.
Fig. 5 a is the flow chart of the poorly efficient recognition methodss example IV of photovoltaic plant device of the present invention, such as Fig. 5 a
Shown, on the basis of any of the above-described embodiment, if described device is centralized inverter, described
According to the information about power of each device, judge whether the information about power of each device meets pre-set poorly efficient
Judgment condition, at least one first device wherein being met described poorly efficient judgment condition is defined as poorly efficient device
The concretely comprising the following steps of part:
S401: according to the information about power of each centralized inverter, calculate the different inversions in same power station
The symmetry coefficient of device.
S402: judge whether the symmetry coefficient of each centralized inverter meets the poorly efficient judgement pre-setting
Condition；Described poorly efficient judgment condition is that the symmetry coefficient of centralized inverter is less than the symmetric system being pre-configured with
Number threshold value, and continue default first duration.
In the present embodiment, the poorly efficient judgment condition of general consideration is the symmetry coefficient of device, optionally,
This poorly efficient judgment condition can also include: under conditions of rated power is constant, the generated energy of described device
Less than the generated energy threshold value being pre-configured with, and continue default second duration；And/or, in rated power
Under conditions of constant, the normalization generated energy of described device is less than the normalization generated energy thresholding being pre-configured with
Value, and continue default 3rd duration.Wherein threshold value and time length can set according to practical situation
Fixed.It is realized, and principle is identical with group string inverter, and one kind of poorly efficient inverter judgement is specifically poorly efficient to be sentenced
Certainly condition is:
Condition one: inverter symmetry coefficient is less than poorly efficient thresholding；
Condition two: inverter normalization generated energy is less than submatrix all inverters normalization generated energy meansigma methodss；
Condition three: inverter normalization generated energy is non-zero；
Wherein: (the inverter place submatrix all inverters same day normalizing elelctrochemical power generation of inverter symmetry coefficient=1-
Amount meansigma methodss-inverter same day normalization generated energy)/inverter place submatrix institute inverter same day normalization sends out
Electricity meansigma methodss.
S403: obtain the mark of at least one the first device；Described first device meets institute for symmetry coefficient
State the centralized inverter of poorly efficient judgment condition.
Below as one example, this programme concrete implementation is described:
Can be right with what group was gone here and there according to the installed capacity of the group string of typing, i.e. rated power, and inverter
The rated power obtaining inverter should be related to, for example: go here and there capacity for 5.6kw according to designing each group, often
5 group strings are hung, then the corresponding capacity of each inverter is 28kw under individual group of string inverter.And each collection
192 group strings are hung, then corresponding installed capacity is 1075.2kw under Chinese style inverter.
For centralized inverter, a submatrix corresponds to an inverter, before judgement, sets low first
Effect hold period, i.e. the first duration and symmetry coefficient threshold value: the poorly efficient thresholding of (1) inverter: 30%；(2)
Poorly efficient hold period: 1 day.
The poorly efficient judgement of centralized inverter: from group string data unlike, calculating in same power station not
With the symmetry coefficient of inverter, and if meeting poorly efficient decision threshold, calculating corresponding poorly efficient loss and sending out
Electricity.According to information about power and the result of calculation calculating by form or graphics mode can be in specifically
Reveal to come.Specifically refer to shown in table 2 below and Fig. 5 b, Fig. 5 b is the poorly efficient assessment of centralized inverter
Result schematic diagram.
The poorly efficient assessment result table of table 2 centralized inverter.
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 are all low than other inverters very many, it is thus determined that this inverter 7
For less efficient device, and calculate the generated energy of poorly efficient loss.
Fig. 6 a is the flow chart of the poorly efficient recognition methodss embodiment five of photovoltaic plant device of the present invention, such as Fig. 6 a
Shown, on the basis of any of the above-described embodiment, if described device be group string, described according to each device
The information about power of part, judges whether the information about power of each device meets the poorly efficient judgment condition pre-setting,
At least one first device wherein being met described poorly efficient judgment condition is defined as the concrete reality of less efficient device
Existing step is:
S501: according to the information about power of each group string, calculate the symmetry coefficient of the group string under each inverter.
In the present embodiment, (this all groups of string same day of group string place inverter is defeated for the symmetry coefficient=1- of group string
Go out power average value-this group string same day output)/this all groups of string same day output work of group string place inverter
Rate meansigma methodss.Calculate the symmetry coefficient of each group string according to above-mentioned formula.
S502: judge whether the symmetry coefficient of each group string meets the poorly efficient judgment condition pre-setting；Institute
State the symmetry coefficient that poorly efficient judgment condition is group string and be less than the symmetry coefficient threshold value being pre-configured with, and continue
Default first duration.
In the present embodiment, as centralized inverter and group string inverter, except considering symmetric system
Number setting judgment condition, it is also possible to will be little for the generated energy of described device under conditions of rated power be constant
In the generated energy threshold value being pre-configured with, and continue default second duration as judgment condition；Or,
Under conditions of rated power is constant, the normalization generated energy of described device is less than the normalizing being pre-configured with
Elelctrochemical power generation amount threshold value, and continue default 3rd duration as judgment condition.Specifically poorly efficient group of one kind
The judgment condition of string may is that
Condition one: group string symmetry coefficient is less than poorly efficient thresholding；
Condition two: group string output is less than all groups of string output meansigma methodss of inverter；
Condition three: group string installed capacity is non-zero, and that is, this group string is linked into inverter；
Wherein: (this all groups of string same day output of group string place inverter is average for group string symmetry coefficient=1-
Value-this group string same day output)/this all groups of string same day output meansigma methods of group string place inverter；
This all groups of string same day outputs of group string place inverter=(electric current * sampled point 1 of sampled point 1
Voltage)+... (sampled point n electric current * sampled point n voltage)；Note: wherein n is adopting of the same day
Total sample.
S503: obtain the mark of at least one the first device；Described first device meets institute for symmetry coefficient
State the group string of poorly efficient judgment condition.
Below as one example, this programme concrete implementation is described: firstly the need of setting group string based on experience value
Poorly efficient thresholding (organizing the symmetry coefficient threshold value of string): 30%；Poorly efficient hold period (the first duration):
1 day, for each group string: be pooled to inverter electricity, the conversion of data processing server according to the same day
The electric current of efficiency and each group string, information of voltage, calculate the symmetry coefficient of the group string under each inverter,
And if meeting poorly efficient decision threshold, calculate corresponding poorly efficient loss generated energy.This calculating is centralized
As broad as long with group string inverter.Specifically refer to shown in table 3 below and Fig. 6 b, Fig. 6 b is group string
Poorly efficient assessment result schematic diagram.
Shown in table 3 and Fig. 6 b, in July 8,9 days, the general power of group string 6, normalization generated energy
And/or symmetry coefficient is all low very many than other group strings, it is thus determined that this group string 6 is less efficient device, and
Calculate the generated energy of poorly efficient loss.
The poorly efficient assessment result table of 3 groups of strings of table.
The poorly efficient recognition methodss for concrete type of device that above-mentioned several embodiment provides, by device
Actually detected information about power is contrasted with default condition, thus quickly orienting poorly efficient in power station
Device, can fast and effectively investigate and process less efficient device, thus reducing the damage that less efficient device is brought
Lose, improve the income in power station, and the electricity of each less efficient device loss can be calculated.
Fig. 7 is the structural representation of data processing server embodiment one of the present invention, as shown in fig. 7, should
Data processing server 10, also referred to as data storage processing server, comprising: acquisition module 11 He
Processing module 12；Wherein, acquisition module 11, the electricity for obtaining each device under the submatrix of power station is believed
Breath；Processing module 12, for the information about power according to each device, judges the information about power of each device
The poorly efficient judgment condition whether satisfaction pre-sets, is wherein met at least the one of described poorly efficient judgment condition
Individual first device is defined as less efficient device；
Wherein, described poorly efficient judgment condition is the symmetry coefficient of device less than the symmetry coefficient door being pre-configured with
Limit value, and continue default first duration.
Optionally, described processing module 12 is additionally operable to the information about power according to each the first device and specified work(
Rate, calculates the poorly efficient loss generated energy of described first device；
Described acquisition module 11 (i.e. receiver module) is sent out specifically for the data acquisition unit receiving photovoltaic plant
The information about power of each device under the power station submatrix sent；The information about power of each device described includes: defeated
Go out electric current, output voltage.
Optionally, when described device be group string inverter, then described processing module 12 specifically for:
According to each group string inverter information about power, calculate same submatrix in different inverters right
Claim coefficient；
Judge whether the symmetry coefficient of each group string inverter meets the poorly efficient judgment condition pre-setting；
Described poorly efficient judgment condition is that the symmetry coefficient of group string inverter is less than the symmetry coefficient thresholding being pre-configured with
Value, and continue default first duration；
Obtain the mark of at least one the first device；Described first device meets described poorly efficient for symmetry coefficient
The group string inverter of judgment condition.
Optionally, when described device be centralized inverter, then described processing module specifically for:
According to the information about power of each centralized inverter, calculate the right of different inverters in same power station
Claim coefficient；
Judge whether the symmetry coefficient of each centralized inverter meets the poorly efficient judgment condition pre-setting；
Described poorly efficient judgment condition is that the symmetry coefficient of centralized inverter is less than the symmetry coefficient thresholding being pre-configured with
Value, and continue default first duration；
Obtain the mark of at least one the first device；Described first device meets described poorly efficient for symmetry coefficient
The centralized inverter of judgment condition.
Optionally, when described device be group string, then described processing module specifically for:
According to the information about power of each group string, calculate the symmetry coefficient of the group string under each inverter；
Judge whether the symmetry coefficient of each group string meets the poorly efficient judgment condition pre-setting；Described poorly efficient
Judgment condition is that the symmetry coefficient of group string is less than the symmetry coefficient threshold value being pre-configured with, and continues default
First duration.
Obtain the mark of at least one the first device；Described first device meets described poorly efficient for symmetry coefficient
The group string of judgment condition.
The data processing server that the present embodiment provides, for executing the arbitrary shown method of Fig. 1 to Fig. 6 b
The technical scheme of embodiment, it is realized, and principle is similar with technique effect, by the actually detected electricity of device
Amount information is contrasted with default condition, thus quickly orienting poorly efficient device in power station, can be fast
Speed, effectively investigate and process less efficient device, thus reducing the loss that less efficient device is brought, improve power station
Income.
Fig. 8 is the configuration diagram of the poorly efficient identifying system embodiment one of photovoltaic plant device of the present invention, such as
Shown in Fig. 8, this system only includes the part in Fig. 1, specific inclusion: at least one power station submatrix
20th, data acquisition unit 30 and the data processing server 10 shown in Fig. 7；Each power station submatrix 20 and institute
State data acquisition unit 30 to connect by data line；Described data acquisition unit 30 and described data processing
Server 10 is connected by data line；
Described data acquisition unit 30 is used for gathering the information about power of each device under the submatrix of described power station, and
The information about power of each device is sent to described data processing server；
Described data processing server 10 is used for:
Receive the information about power of each device under the power station submatrix of data acquisition unit transmission of photovoltaic plant；
According to the information about power of each device, judge whether the information about power of each device meets and pre-set
Poorly efficient judgment condition, at least one first device wherein being met described poorly efficient judgment condition is defined as
Less efficient device；Wherein, described poorly efficient judgment condition is symmetrical less than be pre-configured with for the symmetry coefficient of device
Coefficient threshold value, and continue default first duration.
The poorly efficient identifying system of the photovoltaic plant device that the present embodiment provides, appoints for executing Fig. 1 to Fig. 6 b
The technical scheme of the embodiment of the method shown in, it is realized, and principle is similar with technique effect, and here is no longer superfluous
State.
It should be appreciated that acquisition module can pass through receptor in the embodiment of above-mentioned data processing server
To realize, processing module can be realized by processor, this processor can be CPU (English
Literary composition: central processing unit, referred to as: cpu), can also be other general processors, numeral
Signal processor (English: digital signal processor, referred to as: dsp), special IC (English
Literary composition: application specific integrated circuit, referred to as: asic) etc..General processor can
To be microprocessor or this processor can also be any conventional processor etc..Implement in conjunction with the present invention
The step of the method disclosed in example can be embodied directly in hardware processor execution and complete, or uses processor
In hardware and software module combination execution complete.
One of ordinary skill in the art will appreciate that: realize all or part step of above-mentioned each method embodiment
Suddenly can be completed by the related hardware of programmed instruction.Aforesaid program can be stored in a computer can
Read in storage medium.This program upon execution, executes the step including above-mentioned each method embodiment；And
Aforesaid storage medium includes: rom, ram, magnetic disc or CD etc. are various can be with store program codes
Medium.
Last it is noted that various embodiments above is only in order to illustrating technical scheme rather than right
It limits；Although being described in detail to the present invention with reference to foregoing embodiments, this area common
Technical staff it is understood that it still can be modified to the technical scheme described in foregoing embodiments,
Or equivalent is carried out to wherein some or all of technical characteristic；And these modifications or replacement, and
Do not make the scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution.
Claims (10)
1. a kind of poorly efficient recognition methodss of photovoltaic plant device are it is characterised in that include:
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 and pre-set
Poorly efficient judgment condition, at least one first device wherein being met described poorly efficient judgment condition is defined as
Less efficient device；
Wherein, described poorly efficient judgment condition is the symmetry coefficient of device less than the symmetry coefficient door being pre-configured with
Limit value, and continue default first duration.
2. method according to claim 1 is it is characterised in that methods described also includes:
Information about power according to each the first device and rated power, calculate the poorly efficient damage of described first device
Lose generated energy.
3. method according to claim 2 is it is characterised in that every under the submatrix of described acquisition power station
The information about power of individual device includes:
Receive the information about power of each device under the power station submatrix of data acquisition unit transmission of photovoltaic plant；
The information about power of each device described includes: output current, output voltage.
4. method according to claim 2 it is characterised in that described device be group string inverter,
The then described information about power according to each device, judges whether the information about power of each device meets and sets in advance
The poorly efficient judgment condition put, at least one first device wherein being met described poorly efficient judgment condition determines
For less efficient device, comprising:
According to each group string inverter information about power, calculate same submatrix in different inverters right
Claim coefficient；
Judge whether the symmetry coefficient of each group string inverter meets the poorly efficient judgment condition pre-setting；
Described poorly efficient judgment condition is that the symmetry coefficient of group string inverter is less than the symmetry coefficient thresholding being pre-configured with
Value, and continue default first duration；
Obtain the mark of at least one the first device；Described first device meets described poorly efficient for symmetry coefficient
The group string inverter of judgment condition.
5. method according to claim 2 it is characterised in that described device be centralized inverter,
The then described information about power according to each device, judges whether the information about power of each device meets and sets in advance
The poorly efficient judgment condition put, at least one first device wherein being met described poorly efficient judgment condition determines
For less efficient device, comprising:
According to the information about power of each centralized inverter, calculate the right of different inverters in same power station
Claim coefficient；
Judge whether the symmetry coefficient of each centralized inverter meets the poorly efficient judgment condition pre-setting；
Described poorly efficient judgment condition is that the symmetry coefficient of centralized inverter is less than the symmetry coefficient thresholding being pre-configured with
Value, and continue default first duration；
Obtain the mark of at least one the first device；Described first device meets described poorly efficient for symmetry coefficient
The centralized inverter of judgment condition.
6. method according to claim 2 is it is characterised in that described device is group string, then described
According to the information about power of each device, judge whether the information about power of each device meets pre-set low
Effect judgment condition, wherein met described poorly efficient judgment condition at least one first device be defined as poorly efficient
Device, comprising:
According to the information about power of each group string, calculate the symmetry coefficient of the group string under each inverter；
Judge whether the symmetry coefficient of each group string meets the poorly efficient judgment condition pre-setting；Described poorly efficient
Judgment condition is that the symmetry coefficient of group string is less than the symmetry coefficient threshold value being pre-configured with, and continues default
First duration；
Obtain the mark of at least one the first device；Described first device meets described poorly efficient for symmetry coefficient
The group string of judgment condition.
7. the method according to any one of claims 1 to 3 is it is characterised in that described poorly efficient judgement
Condition also includes:
Under conditions of rated power is constant, the generated energy of described device is less than the generated energy door being pre-configured with
Limit value, and continue default second duration；Or,
Under conditions of rated power is constant, the normalization generated energy of described device is less than returning of being pre-configured with
One elelctrochemical power generation amount threshold value, and continue default 3rd duration.
8. a kind of data processing server is it is characterised in that include:
Acquisition module, for obtaining the information about power of each device under the submatrix of power station；
Processing module, for the information about power according to each device, judges that the information about power of each device is
The poorly efficient judgment condition that no satisfaction pre-sets, wherein met described poorly efficient judgment condition at least one
First device is defined as less efficient device；
Wherein, described poorly efficient judgment condition is the symmetry coefficient of device less than the symmetry coefficient door being pre-configured with
Limit value, and continue default first duration.
9. server according to claim 8 is it is characterised in that described processing module is additionally operable to root
According to information about power and the rated power of each the first device, the poorly efficient loss calculating described first device generates electricity
Amount；
Under the power station submatrix that described acquisition module sends specifically for the data acquisition unit receiving photovoltaic plant
The information about power of each device；The information about power of each device described includes: output current, output voltage.
10. a kind of poorly efficient identifying system of photovoltaic plant device is it is characterised in that include: at least one
Power station submatrix, data acquisition unit and data processing server described in claim 8 or 9；Each power station
Battle array is connected by data line with described data acquisition unit；Described data acquisition unit and described data processing
Server is connected by data line；
Described data acquisition unit is used for gathering the information about power of each device under the submatrix of described power station, and will
The information about power of each device is sent to described data processing server；
Described data processing server is used for:
Receive the information about power of each device under the power station submatrix of data acquisition unit transmission of photovoltaic plant；
According to the information about power of each device, judge whether the information about power of each device meets and pre-set
Poorly efficient judgment condition, at least one first device wherein being met described poorly efficient judgment condition is defined as
Less efficient device；Wherein, described poorly efficient judgment condition is symmetrical less than be pre-configured with for the symmetry coefficient of device
Coefficient threshold value, and continue default first duration.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107086857A (en) * | 2017-06-09 | 2017-08-22 | 上海历挚机电设备有限公司 | A kind of photovoltaic plant monitoring system and method |
| CN107404287A (en) * | 2017-05-23 | 2017-11-28 | 扬州鸿淏新能源科技有限公司 | A kind of photovoltaic plant method for diagnosing faults |
| CN111835283A (en) * | 2020-06-30 | 2020-10-27 | 文庭荣 | Instrument equipment for finding low-efficiency components of photovoltaic power station |
| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338851A (en) * | 2011-09-28 | 2012-02-01 | 东北大学 | Plug and play detecting device for photovoltaic power generation grid-connected system |
| CN102608512A (en) * | 2012-04-11 | 2012-07-25 | 上海电力学院 | Method for on-line detecting faults of photovoltaic cells in solar photovoltaic power station on line |
| CN103166240A (en) * | 2011-12-15 | 2013-06-19 | 中国科学院电工研究所 | Grid-connected solar photovoltaic power station monitoring system |
| CN103730911A (en) * | 2013-12-25 | 2014-04-16 | 常熟开关制造有限公司(原常熟开关厂） | Grid connection method of photovoltaic grid connection inverter and photovoltaic grid connection power generating system |
| US8952825B2 (en) * | 2011-04-11 | 2015-02-10 | Phoenix Contact Gmbh & Co. Kg | Monitoring device for an ungrounded power network of a photovoltaic system |
| CN104467659A (en) * | 2014-11-28 | 2015-03-25 | 浙江晶科能源有限公司 | Device capable of locating abnormal photovoltaic array and photovoltaic module structure |
-
2015
- 2015-07-22 CN CN201510434092.9A patent/CN106374833B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8952825B2 (en) * | 2011-04-11 | 2015-02-10 | Phoenix Contact Gmbh & Co. Kg | Monitoring device for an ungrounded power network of a photovoltaic system |
| CN102338851A (en) * | 2011-09-28 | 2012-02-01 | 东北大学 | Plug and play detecting device for photovoltaic power generation grid-connected system |
| CN103166240A (en) * | 2011-12-15 | 2013-06-19 | 中国科学院电工研究所 | Grid-connected solar photovoltaic power station monitoring system |
| CN102608512A (en) * | 2012-04-11 | 2012-07-25 | 上海电力学院 | Method for on-line detecting faults of photovoltaic cells in solar photovoltaic power station on line |
| CN103730911A (en) * | 2013-12-25 | 2014-04-16 | 常熟开关制造有限公司(原常熟开关厂） | Grid connection method of photovoltaic grid connection inverter and photovoltaic grid connection power generating system |
| CN104467659A (en) * | 2014-11-28 | 2015-03-25 | 浙江晶科能源有限公司 | Device capable of locating abnormal photovoltaic array and photovoltaic module structure |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107404287A (en) * | 2017-05-23 | 2017-11-28 | 扬州鸿淏新能源科技有限公司 | A kind of photovoltaic plant method for diagnosing faults |
| CN107086857A (en) * | 2017-06-09 | 2017-08-22 | 上海历挚机电设备有限公司 | A kind of photovoltaic plant monitoring system and method |
| 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 |
| CN111835283A (en) * | 2020-06-30 | 2020-10-27 | 文庭荣 | Instrument equipment for finding low-efficiency components of 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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|---|---|
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