CN108154279A - A kind of photovoltaic power station system performance ratio weights online evaluation method and system - Google Patents
A kind of photovoltaic power station system performance ratio weights online evaluation method and system Download PDFInfo
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- CN108154279A CN108154279A CN201611092914.0A CN201611092914A CN108154279A CN 108154279 A CN108154279 A CN 108154279A CN 201611092914 A CN201611092914 A CN 201611092914A CN 108154279 A CN108154279 A CN 108154279A
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Abstract
The present invention relates to a kind of photovoltaic power station system performance ratios to weight online evaluation method and system, sent instructions by host computer operating system to synchronizing high-acruracy survey during each module GPS schools, it is established and communicated by high speed radio transmission device between each module and host computer, real-time data transmission is to host computer database, it analyzes to obtain each subsystem performance ratio (PR) by host computer, the proportion that whole station photovoltaic module actual motion capacity is accounted for further according to subsystem components actual motion capacity each during test is weighted, obtain photovoltaic plant overall system performance ratio (PR), performance ratio (PR) situation of change can be presented on host computer interface in real time, also the day PR value of each subsystem and photovoltaic plant total system can be exported by report form, month PR values and year PR value.Technical solution provided by the invention increases the scope of application of appraisal procedure, can on-line testing for a long time and assessment, improve assessment the rich of data, objectivity and reliability.
Description
Technical field
The present invention relates to photovoltaic testing fields, and in particular to a kind of photovoltaic power station system performance ratio weights online evaluation method
And system.
Background technology
With the high speed development of China's photovoltaic industry, the power generation performance of photovoltaic plant receives significant attention, photovoltaic plant system
System performance ratio (PR) is to reflect the important indicator of photovoltaic power station power generation performance, also as the important ginseng in photovoltaic plant process of exchange
Index is examined, therefore the reliability of its data seems increasingly important.
There are two ways to photovoltaic power station system performance ratio (PR) assessment at present is common：
First method is directly mounted from photovoltaic plant owner acquisition grid entry point generated energy data and photovoltaic plant
The irradiance data of Meteorological Device record, is then calculated according to the data being collected into.This method is there are larger defect, first
The irradiatometer majority of photovoltaic plant installation at present is level angle, it is impossible to which inclination angle identical with photovoltaic module holding, cumulative amount is not
The irradiation obtained on photovoltaic plant unit area can be represented, it is also necessary to carry out complicated angular transition and calculate, there are larger mistakes
Difference；Secondly the Meteorological Device that photovoltaic plant uses at present is irregular and cannot be guaranteed to carry out periodic dosages to precision, causes to count
It is inaccurate to calculate result.
Second method is that built photovoltaic power station power generation amount and irradiation level are measured using " one-point type ", i.e., is tested using generated energy
Device measures power station gross generation, is consistent using irradiatometer and photovoltaic module inclination angle and carries out irradiation test.This method is fitted
It is had some limitations with range, the photovoltaic plant only there are one photovoltaic module mounted angle is applicable in, and to Yushan Hill
Ground, tracking system etc. cause photovoltaic module not applying to then there are many inclination angle in photovoltaic plant.
There are no the Validity Test appraisal procedures that appearance is unanimously approved for photovoltaic power station system performance ratio (PR) at present, each to survey
Trying appraisal procedure, more or less there are following defects：1st, data precision is not high, lacks accuracy, it is difficult to the reflection knot of objective and fair
Fruit authenticity；2nd, the scope of application has some limitations, it is impossible to meet the progress Validity Test assessment under various working conditions；
3rd, the gas irradiation level test device model that is carried due to each photovoltaic plant, precision, inclination angle are not quite similar, using each light being collected into
Overhead utility adds up the PR values that irradiation is calculated and does not have comparativity, and reference significance is little.
Invention content
To solve above-mentioned deficiency of the prior art, the object of the present invention is to provide a kind of photovoltaic power station system performance ratios to add
Online evaluation method and system are weighed, it can be achieved that each subsystem of photovoltaic plant synchronizes high-precision on-line testing and PR assessments；Test is commented
Estimate device and integrate mass storage, it can be achieved that the photovoltaic plant continuously long-term PR tests assessment of multiple assembly mounted angle；On
Each subsystem and the changes in contrast situation of photovoltaic plant entirety PR can be presented in position machine software in real time, improve system performance and commented than PR
Estimate the accuracy and reliability of result.
The purpose of the present invention is what is realized using following technical proposals：
The present invention provides a kind of photovoltaic power station system performance ratio weighting online evaluation method, it is improved in that described
Appraisal procedure by send instructions under upper computer control system to assess test module GPS schools when module synchronize high-precision survey
Amount, assesses to establish by radio transmitting device between test module and upper computer control system and communicates, and real-time data transmission is to upper
The database of position machine control system, analyzes to obtain subsystem A, subsystem B, subsystem C and son by upper computer control system
System D performance ratio PR hold further according to subsystem A, subsystem B, subsystem C and subsystem D components actual motion during test
Amount accounts for the proportion of whole station photovoltaic module actual motion capacity and is weighted, and obtains photovoltaic plant overall system performance than PR,
Performance ratio PR situations of change are presented on the interface of upper computer control system in real time, and the method includes following step：
(1) clear and definite photovoltaic power station system component mounted angle type；
(2) evaluation subsystem is divided according to inclination angle；
(3) installation assessment test module, upper computer control system instruct when issuing school
(4) judge that each assessment test module tests whether to synchronize；
(5) upper computer control system issues test and instructs and obtain test data in real time；
(6) system performance of each subsystem and whole station is assessed in real time than PR value；
(7) guiding system performance ratio PR value assessment reports, assessment terminate.
Further, in the step (1), photovoltaic power station system component installation type includes：Fixed installation and tracking mode
Installation；The fixed installation includes three kinds of different mounted angles, and three kinds of different mounted angles include due south direction 37
Degree, 15 degree of directions of south by east tilt 38 degree, and 20 degree of directions of south by west tilt 38 degree.
Further, it in the step (2), is divided according to the angle difference at inclination angle, the corresponding square formation in each inclination angle is made
For a subsystem, photovoltaic power station system is divided into subsystem A, subsystem B, subsystem C and subsystem D；
Determine that subsystem A, subsystem B, subsystem C and subsystem D capacity account for the proportion of whole station capacity, i.e. weights are distinguished
For φ1、φ2、φ3And φ4, upper computer control system sets data acquisition transmission channel and needs the parameter that sets；The need
The parameter to be set includes the corresponding inclination angle size of each channel, corresponding capacity and the weights φ of putting into operation of each subsystem1、φ2、
φ3And φ4。
Further, in the step (3), assessment test module is separately mounted to subsystem A, subsystem B, subsystem
The corresponding test point of C and subsystem D, each irradiatometer remain and the inclination angle of tested subsystem components one dduring test
It causes, is instructed when issuing synchronous school by upper computer control system, make assessment test module synchronism detection and transmit data.
Further, in the step (4), assessing in test module has time service trigger signal, if receiving trigger signal,
Host computer is fed back to, which completes, if all assessment test modules complete time service, starts to synchronize
Test；If assessing test module test to synchronize, step (5) is carried out；Otherwise, return to step (3).
Further, in the step (6), upper computer control system real-time reception test data simultaneously carries out subsystem A, son
System B, subsystem C and subsystem D and whole station system performance are analyzed than PR value, obtain by analysis subsystem A, subsystem B,
The system performance of subsystem C and subsystem D are respectively η than PR value1、η2、η3And η4, photovoltaic plant is obtained using weighted calculation
System performance is than PR=η1*φ1+η2*φ2+η3*φ3+η4*φ4；Wherein：φ1、φ2、φ3And φ4Respectively subsystem A, subsystem
System B, subsystem C and subsystem D capacity account for the proportion of whole station capacity, i.e. weights；
According to the length of test period, real-time system performance ratio PR values change curve, day PR value, moon PR value and year are obtained
PR values；The calculation formula of the PR values is：PR=(E/P0)/(G/1000), wherein：E is the actual power generation in a period of time,
P0For rated output power, G is the irradiation accumulated value in same time period, as needed, choose one day, one month respectively or
The initial data of 1 year is calculated.
The present invention also provides a kind of photovoltaic power station system performance ratios to weight online evaluation system, it is improved in that institute
State subsystem A, subsystem B, subsystem C and subsystem D that system includes photovoltaic plant, the subsystem A, subsystem B,
The corresponding test point of subsystem C and subsystem D is equipped with assessment test module, the assessment test module and PC control
System connects；The subsystem A, subsystem B, subsystem C and subsystem D are connected to by grid entry point in public electric wire net.
Further, the assessment test module measures subsystem A, subsystem B, subsystem C and son by irradiatometer
The irradiation level of system D；The test module includes module during GPS schools.
Further, by send instructions under upper computer control system to assess test module GPS schools when module carry out it is same
High-acruracy survey is walked, assesses and communication is established by radio transmitting device between test module and upper computer control system, data are real
When be transferred to the database of upper computer control system, analyze to obtain subsystem A, subsystem B, subsystem by upper computer control system
Unite C and subsystem D performance ratio PR, real further according to subsystem A, subsystem B, subsystem C and subsystem D components during test
The proportion that border working capacity accounts for whole station photovoltaic module actual motion capacity is weighted, and obtains photovoltaic plant integral systematicness
It can be in real time presented on the interface of upper computer control system than PR, performance ratio PR situations of change or son is exported by report form
System A, subsystem B, subsystem C and subsystem D and photovoltaic plant total system day PR value, moon PR value and year PR value.
In order to the embodiment to disclosure some aspects there are one basic understanding, simple summary is shown below.It should
Summarized section is not extensive overview, nor to determine key/critical component or describe the protection domain of these embodiments.
Its sole purpose is that some concepts are presented with simple form, in this, as the preamble of following detailed description.
Compared with the immediate prior art, the excellent effect that technical solution provided by the invention has is：
It is of the invention compared with traditional test appraisal procedure, fully considered component mounted angle, mounting means problem pair
Influence caused by testing assessment result, assessment is first decomposed by photovoltaic plant total system, then the method for being combined weighting assessment,
The high precision performance of each subsystem of photovoltaic plant be can not only obtain than PR as a result, can also obtain than conventional method more accurately
For photovoltaic plant overall performance than PR assessment result, the method increase the scope of applications of appraisal procedure, can long-term on-line testing
With assessment, assessment the rich of data, objectivity and reliability are improved.
Description of the drawings
Fig. 1 is photovoltaic plant performance ratio (PR) weighting online evaluation test philosophy figure provided by the invention；
Fig. 2 is photovoltaic plant performance ratio (PR) weighting online evaluation flow chart provided by the invention.
Specific embodiment
The specific embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
The following description and drawings fully show specific embodiments of the present invention, to enable those skilled in the art to
Put into practice them.Other embodiments can include structure, logic, it is electrical, process and other change.Embodiment
Only represent possible variation.Unless explicitly requested, otherwise individual component and function are optional, and the sequence operated can be with
Variation.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.This hair
The range of bright embodiment includes equivalent obtained by the entire scope of claims and all of claims
Object.Herein, these embodiments of the invention can individually or generally be represented that this is only with term " invention "
For convenience, it and if in fact disclosing the invention more than one, is not meant to automatically limit ranging from appointing for the application
What single invention or inventive concept.
Embodiment one
Continuously long-term high precision performance tests assessment to the achievable photovoltaic plant of the present invention than PR, is pressed using multiple measurement modules
Subregion synchro measure assessment is carried out, then be weighted assessment and obtain photovoltaic electric according to component mounted angle and the different of mounting means
Overall system performance of standing ratio (PR), the limitation for measuring conventional photovoltaic power station performance ratio (PR) appraisal procedure are improved.
Specifically：
The present invention provides a kind of photovoltaic power station system performance ratio weighting online evaluation method, and flow chart is as shown in Fig. 2, packet
Include following step：
(1) clear and definite photovoltaic power station system component mounted angle type；
(2) evaluation subsystem is divided according to inclination angle；
(3) installation assessment test module, upper computer control system instruct when issuing school
(4) judge that each assessment test module tests whether to synchronize；
(5) upper computer control system issues test and instructs and obtain test data in real time；
(6) system performance of each subsystem and whole station is assessed in real time than PR value；
(7) guiding system performance ratio PR value assessment reports, assessment terminate.
In above-described embodiment, in step (1), photovoltaic power station system component mounting means includes：Fixed installation mode and with
Track formula mounting means；The fixed installation mode includes three kinds of different mounted angles, and three kinds of different mounted angles are included just
South is to 37 degree, and 15 degree of directions of south by east tilt 38 degree, and 20 degree of directions of south by west tilt 38 degree.
It in above-described embodiment, in step (2), is divided according to the angle difference at inclination angle, the corresponding square formation in each inclination angle is made
For a subsystem, photovoltaic power station system is divided into subsystem A, subsystem B, subsystem C and subsystem D；
Determine that subsystem A, subsystem B, subsystem C and subsystem D capacity account for the proportion of whole station capacity, i.e. weights are distinguished
For φ1、φ2、φ3And φ4, upper computer control system sets data acquisition transmission channel and needs the parameter that sets；The need
The parameter to be set includes the corresponding inclination angle size of each channel, corresponding capacity and the weights φ of putting into operation of each subsystem1、φ2、
φ3And φ4。
In above-described embodiment, in step (3), assessment test module is separately mounted to subsystem A, subsystem B, subsystem
The corresponding test point of C and subsystem D, each irradiatometer remain and the inclination angle of tested subsystem components one dduring test
It causes, is instructed when issuing synchronous school by upper computer control system, make assessment test module synchronism detection and transmit data.
In above-described embodiment, assessing in test module has time service trigger signal, if receiving trigger signal, feeds back to upper
Machine, the assessment test module time service are completed, if all assessment test modules complete time service, start synchronism detection；If it comments
Estimate test module test to synchronize, then carry out step (5)；Otherwise, return to step (3).
In above-described embodiment, in step (6), upper computer control system real-time reception test data simultaneously carries out subsystem A, son
System B, subsystem C and subsystem D and whole station system performance are analyzed than PR value, obtain by analysis subsystem A, subsystem B,
The system performance of subsystem C and subsystem D are respectively η than PR value1、η2、η3And η4, photovoltaic plant is obtained using weighted calculation
System performance is than PR=η1*φ1+η2*φ2+η3*φ3+η4*φ4；Wherein：φ1、φ2、φ3And φ4Respectively subsystem A, subsystem
System B, subsystem C and subsystem D capacity account for the proportion of whole station capacity, i.e. weights；
According to the length of test period, real-time system performance ratio PR values change curve, day PR value, moon PR value and year are obtained
PR values.PR calculation formula：PR=(E/P0)/(G/1000), wherein E be a period of time in actual power generation, P0For rated output
Power, G are that the irradiation accumulated value in same time period (as needed, chooses one day, one month or 1 year original respectively
Data are calculated).
Embodiment two
Based on identical design, the present invention also provides a kind of photovoltaic power station system performance ratios to weight online evaluation system,
Schematic diagram is as shown in Figure 1, subsystem A, subsystem B, subsystem C and subsystem D including photovoltaic plant, in the subsystem
A, the corresponding test point of subsystem B, subsystem C and subsystem D are equipped with assessment test module, and the assessment test module is led to
Wireless network is crossed to connect with upper computer control system；The subsystem A, subsystem B, subsystem C and subsystem D pass through grid-connected
Point is connected in public electric wire net.It assesses test module and subsystem A, subsystem B, subsystem C and subsystem is measured by irradiatometer
The irradiation level of system D.
The evaluation system that the method for the present invention uses integrates high-accuracy data acquisition sensing using modularized design thinking
Module when device and GPS schools, assessment test module when test is assessed are separately mounted to each subsystem testing point of photovoltaic plant, first
By upper computer control system send instructions the GPS schools to each assessment test module when synchronize high-acruracy survey, each assessment is surveyed
It is established and communicated by high speed radio transmission device between die trial block and upper computer control system, real-time data transmission to host computer control
The database of system processed is analyzed to obtain each subsystem performance ratio (PR) by upper computer control system, further according to each during test
The proportion that subsystem components actual motion capacity accounts for whole station photovoltaic module actual motion capacity is weighted, and obtains photovoltaic electric
Overall system performance of standing ratio (PR), performance ratio (PR) situation of change can be presented on host computer interface, can also pass through report shape in real time
Formula export each subsystem and photovoltaic plant total system day PR value, moon PR value and year PR value.
Embodiment three
The assessment of performance ratio (PR) value is carried out for a mountainous region photovoltaic plant, there are two types of component mounting means for the photovoltaic plant：
One kind is fixed installation mode, and one kind is tracking mode mounting means.Wherein different mounted angle there are three types of fixed installation modes,
Photovoltaic plant is divided into four subsystems (system A, system B, system C and system D) accordingly, with reference to shown in attached drawing 2, to this
Power station carries out the specific steps of performance ratio (PR) assessment using weighting appraisal procedure：
1) ensure that photovoltaic plant does not power off normal operation during test；
2) determine that the proportion that subsystem A, subsystem B, subsystem C and subsystem D capacity account for whole station capacity is respectively
φ1、φ2、φ3、φ4, upper computer control system sets data acquisition transmission channel and relevant parameter；
3) four test modules are separately mounted to the corresponding test point of four subsystems, each irradiatometer dduring test should
It remains consistent with tested subsystem components inclination angle, is instructed when issuing synchronous school by host computer, test each module synchronization
And transmit data；
4) master system real-time reception data and carry out each subsystem and whole station PR values analysis, obtain each son by analysis
System PR values are respectively η1、η2、η3、η4, photovoltaic plant overall system performance is obtained than PR=η using weighted calculation1*φ1+η2*
φ2+η3*φ3+η4*φ4.According to the length of test period, can obtain real-time PR values change curve, day PR value, moon PR value and
Year PR values etc..
5) PR value assessment reports are exported, assessment terminates.
Performance ratio (PR) assessment of the present invention can not only obtain photovoltaic plant entirety in real time using weighting online evaluation method
Performance ratio (PR), and accurate assessment and comparative analysis can be carried out to the performance ratio (PR) of internal subsystems, contribute to rapid
Finding influences the factor of performance ratio PR, by this weighting appraisal procedure, improves the reliable of system performance ratio (PR) assessed value
Property.
The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, although with reference to above-described embodiment pair
The present invention is described in detail, those of ordinary skill in the art still can to the present invention specific embodiment into
Row modification either equivalent replacement these without departing from any modification of spirit and scope of the invention or equivalent replacement, applying
Within the claims of the pending present invention.
Claims (9)
1. a kind of photovoltaic power station system performance ratio weights online evaluation method, which is characterized in that the appraisal procedure passes through upper
Send instructions under machine control system to assess test module GPS schools when module synchronize high-acruracy survey, assess test module
It is established and communicated by radio transmitting device between upper computer control system, the number of real-time data transmission to upper computer control system
According to library, analyze to obtain subsystem A, subsystem B, subsystem C and subsystem D performance ratio PR by upper computer control system, then
Whole station photovoltaic module is accounted for according to subsystem A, subsystem B, subsystem C and subsystem D component actual motion capacity during test
The proportion of actual motion capacity is weighted, and obtains photovoltaic plant overall system performance than PR, performance ratio PR situations of change
It is presented on the interface of upper computer control system in real time, the method includes following step：
(1) clear and definite photovoltaic power station system component mounted angle type；
(2) evaluation subsystem is divided according to inclination angle；
(3) installation assessment test module, upper computer control system instruct when issuing school
(4) judge that each assessment test module tests whether to synchronize；
(5) upper computer control system issues test and instructs and obtain test data in real time；
(6) system performance of each subsystem and whole station is assessed in real time than PR value；
(7) guiding system performance ratio PR value assessment reports, assessment terminate.
2. photovoltaic power station system performance ratio as described in claim 1 weights online evaluation method, which is characterized in that the step
(1) in, photovoltaic power station system component installation type includes：It is fixedly mounted and tracking mode is installed；The fixed installation includes three kinds
Different mounted angles, three kinds of different mounted angles include 37 degree of due south direction, and 15 degree of directions of south by east tilt 38 degree,
20 degree of directions of south by west tilt 38 degree.
3. photovoltaic power station system performance ratio as described in claim 1 weights online evaluation method, which is characterized in that the step
(2) it in, is divided according to the angle difference at inclination angle, the corresponding square formation in each inclination angle is as a subsystem, by photovoltaic plant system
System is divided into subsystem A, subsystem B, subsystem C and subsystem D；
Determine that subsystem A, subsystem B, subsystem C and subsystem D capacity account for the proportion of whole station capacity, i.e. weights are respectively
φ1、φ2、φ3And φ4, upper computer control system sets data acquisition transmission channel and needs the parameter that sets；The needs
The parameter of setting includes the corresponding inclination angle size of each channel, corresponding capacity and the weights φ of putting into operation of each subsystem1、φ2、φ3
And φ4。
4. photovoltaic power station system performance ratio as described in claim 1 weights online evaluation method, which is characterized in that the step
(3) in, assessment test module is separately mounted to the corresponding test point of subsystem A, subsystem B, subsystem C and subsystem D,
Each irradiatometer remains consistent with the inclination angle of tested subsystem components dduring test, is issued together by upper computer control system
It is instructed when walking school, makes assessment test module synchronism detection and transmit data.
5. photovoltaic power station system performance ratio as described in claim 1 weights online evaluation method, which is characterized in that the step
(4) in, assessing in test module has time service trigger signal, if receiving trigger signal, feeds back to host computer, assessment test mould
Block time service is completed, if all assessment test modules complete time service, starts synchronism detection；If it is same to assess test module test
Step, then carry out step (5)；Otherwise, return to step (3).
6. photovoltaic power station system performance ratio as described in claim 1 weights online evaluation method, which is characterized in that the step
(6) in, upper computer control system real-time reception test data simultaneously carries out subsystem A, subsystem B, subsystem C and subsystem D
And whole station system performance is analyzed than PR value, the system for obtaining subsystem A, subsystem B, subsystem C and subsystem D by analysis
Performance ratio PR values are respectively η1、η2、η3And η4, photovoltaic power station system performance ratio PR=η are obtained using weighted calculation1*φ1+η2*φ2
+η3*φ3+η4*φ4；Wherein：φ1、φ2、φ3And φ4Respectively subsystem A, subsystem B, subsystem C and subsystem D capacity
Account for the proportion of whole station capacity, i.e. weights；
According to the length of test period, real-time system performance ratio PR values change curve, day PR value, moon PR value and year PR are obtained
Value；The calculation formula of the PR values is：PR=(E/P0)/(G/1000), wherein：E be a period of time in actual power generation, P0
For rated output power, G is the irradiation accumulated value in same time period, as needed, is chosen one day, one month or one respectively
The initial data in year is calculated.
7. a kind of photovoltaic power station system performance ratio weights online evaluation system, which is characterized in that the system comprises photovoltaic plants
Subsystem A, subsystem B, subsystem C and subsystem D, in the subsystem A, subsystem B, subsystem C and subsystem D
Corresponding test point assessment test module is installed, the assessment test module is connect with upper computer control system；The subsystem
System A, subsystem B, subsystem C and subsystem D are connected to by grid entry point in public electric wire net.
8. photovoltaic power station system performance ratio as claimed in claim 7 weights online evaluation system, which is characterized in that the assessment
Test module measures the irradiation level of subsystem A, subsystem B, subsystem C and subsystem D by irradiatometer；The test module
Module during including GPS schools.
9. photovoltaic power station system performance ratio as claimed in claim 7 weights online evaluation system, which is characterized in that by upper
Send instructions under machine control system to assess test module GPS schools when module synchronize high-acruracy survey, assess test module
It is established and communicated by radio transmitting device between upper computer control system, the number of real-time data transmission to upper computer control system
According to library, analyze to obtain subsystem A, subsystem B, subsystem C and subsystem D performance ratio PR by upper computer control system, then
Whole station photovoltaic module is accounted for according to subsystem A, subsystem B, subsystem C and subsystem D component actual motion capacity during test
The proportion of actual motion capacity is weighted, and obtains photovoltaic plant overall system performance than PR, performance ratio PR situations of change
Be presented on the interface of upper computer control system in real time or by report form export subsystem A, subsystem B, subsystem C with
And subsystem D and photovoltaic plant total system day PR value, moon PR value and year PR value.
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