CN103955777A - Photovoltaic power generation access power distribution network scheme design and analysis assessment auxiliary system - Google Patents
Photovoltaic power generation access power distribution network scheme design and analysis assessment auxiliary system Download PDFInfo
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Abstract
The invention discloses a photovoltaic power generation access power distribution network scheme design and analysis assessment auxiliary system which comprises a basic data acquisition module, a data processing module, a photovoltaic access power distribution network scheme design module, a photovoltaic access power distribution network scheme analysis assessment module, an optimization planning module provided with a photovoltaic active power distribution network, an analysis assessment module provided with a photovoltaic active power distribution network and a system built-in parameter and case library. The photovoltaic power generation access power distribution network scheme design and analysis assessment auxiliary system can meet the demands for photovoltaic access power distribution network scheme design and analysis assessment and the analysis assessment of the photovoltaic active power distribution network, is compatible with features of a national power distribution network information system and data and supports the timing sequence analysis demand. In addition, a convenient tool is provided for reasonable utilization of photovoltaic resources and effective absorption of photovoltaic power generation, and an analysis supporting tool is provided for development and transition from a traditional power distribution network to a future active smart power distribution network.
Description
Technical field
The present invention relates to the system in a kind of distribution network planning field, specifically a kind of photovoltaic generation access power distribution network conceptual design and analysis and evaluation backup system.
Background technology
The Main Means that photovoltaic generation utilizes as sun power, to Optimization of Energy Structure, promote energy-saving and emission-reduction, to realize Sustainable Socioeconomic Development significant.Along with the appearance in succession of relevant policies and technical standard, domestic grid-connected photovoltaic capacity presents the trend sharply rising in recent years.Large-scale distributed photovoltaic access power distribution network, the many-sides such as the planning operation to traditional power distribution network are exerted an influence, tradition power distribution network will change the two-way flow characteristic with trend into, user's load and power supply dual role, the probabilistic New Active power distribution network of both-end of load and power supply, thereby cause the analysis and evaluation instrument of traditional power distribution network no longer completely applicable, as external CYMDIST(CYME Distribution, the distribution system analysis system of CYME company), the electric power electric analysis of ETAP(ETAP company, electric energy management Comprehensive Analysis Software system), DPlan(Distribution Planning, distribution network planning system) etc. the function that provides all belong to traditional distribution system analysis function, do not consider the feature of a large amount of accesses of distributed energy in power distribution network.Existing new forms of energy design tool is as U.S.'s regenerative resource laboratory (NREL, National Renewable Energy Laboratory) exploitation microgrid economic analysis instrument HOMER(Hybrid Optimization of Multiple Energy Resources, multiple-energy-source hybrid optimization system), Germany power system analysis software DIgSILENT(Digital Simulation and Electrical Network, Digital Simulation and electrical network computing system), and special photovoltaic system analysis and design instrument PVsyst(PhotoVoltaic system, photovoltaic system design software), PV*SOL(PhotoVoltaic Solar, solar energy photovoltaic system design software) etc., bias toward the operation sunykatuib analysis of photovoltaic plant body Computer Aided Design and photovoltaic generation, can not run through the overall process of photovoltaic access engineering assistance design work, do not support to weigh from electrical network entirety angle the photovoltaic carrying capacity of whole power distribution network, and can not compatible domestic power distribution network infosystem and the feature of data.
The at present domestic new forms of energy access power distribution network real work taking photovoltaic as representative is mainly manifested in the demand of aid:
1) demand to photovoltaic access power distribution network design aids
At present domestic in the time carrying out photovoltaic access power distribution network conceptual design, conventionally all need first to screen the related data of extracting in power distribution network relevant information system, then convert the form of the instrument such as PVsyst, PV*SOL requirement to, also need to be used in combination multiple types of tools to realize the function of Computer Aided Design, evaluate alternatives, be not easy to carrying out on a large scale of photovoltaic access power distribution network conceptual design work.Therefore needing has special photovoltaic access power distribution network design aids, not only run through the overall process of photovoltaic access engineering assistance design work, and the feature of compatible domestic power distribution network infosystem and data, can be directly embedded in the existing distribution system analysis instrument of Utilities Electric Co..
2) demand to time series analysis
When tradition distribution system analysis instrument generally adopts based on a certain typical case, the analytical approach of discontinuity surface, analyzes as distribution network planning adopts the state in peak load moment conventionally.And photovoltaic generation has intermittently, random feature, its continued jitters within the specific limits of exerting oneself, and may sharply change at short notice.If still use the analytical form of traditional distribution system analysis instrument discontinuity surface when single, will probably produce wrong analysis result, be therefore necessary to adopt Time Series Analysis Method to carry out more careful analysis and evaluation.
Described " time series analysis ", refer to the system that can carry out computational analysis with multiple time scale (when single discontinuity surface, 1 year, 1 day, 1 hour etc.), need to be based upon possess electrical network sequential service data, on basis that photovoltaic power generation apparatus is exerted oneself the detailed time series datas such as time series data.
Along with the lifting of acquisition speed and the development of mass data storage technology, the time series data collection of power distribution network is achieved with storage, the time series analysis of Study on Power Grid Planning aspect can realize completely, and traditional distribution system analysis instrument does not utilize these data well.
3) demand to active power distribution network synthesis assessment
Photo-voltaic power supply accesses after power distribution network on a large scale, and operation of power networks state will become more complicated because having in a large number the photo-voltaic power supply of randomness.Impact power distribution network being caused due to photo-voltaic power supply is not the simple superposition of each photo-voltaic power supply impact, need to be from the angle of power distribution network entirety, on the basis of time series analysis, power distribution network is carried out to many-sided analysis, thereby adaptive faculty and the receiving ability of Efficient Evaluation power distribution network to photo-voltaic power supply access, and planning, examination & approval and the design of instructing photovoltaic access power distribution network with this, the scientific order of guiding grid-connected photovoltaic develops.
In a word, at present domestic photovoltaic access power distribution network conceptual design and the analysis and evaluation backup system of needing a set of support time series analysis badly, except realizing the conceptual design and analysis and evaluation of the single engineering of photovoltaic access power distribution network, can also to containing, the entirety of the active power distribution network of photovoltaic be planned, design and analysis and assessment.
Summary of the invention
The present invention is exactly in order to solve the problems of the prior art, and a kind of photovoltaic generation access power distribution network conceptual design and analysis and evaluation backup system are provided.
The present invention realizes according to following technical scheme:
Photovoltaic generation access power distribution network conceptual design of the present invention and analysis and evaluation backup system, comprising:
Basic data acquisition module, data processing module, photovoltaic access power distribution network conceptual design module, photovoltaic access power distribution network program analysis evaluation module, containing the optimization planning module of the active power distribution network of photovoltaic, containing the analysis and evaluation module of the active power distribution network of photovoltaic, the parameter-embedded and case library of system.Wherein:
Described basic data acquisition module, be responsible for obtaining the required external data of photovoltaic generation access power distribution network conceptual design and analysis and evaluation backup system, and according to conceptual design and analysis and evaluation demand, the data of these dispersions are carried out to information fusion splicing, formation base data storage;
Described data processing module, the basic data of being responsible for that basic data acquisition module is collected carries out data check reparation and the reduction of normal operating mode data is processed, and generates the ripe data that meet conceptual design and analysis and evaluation needs;
Described photovoltaic access power distribution network conceptual design module, read in the grid-connected typical access scheme in the parameter-embedded typical access scheme storehouse with case library of ripe data and system, the conceptual scheme that completes photovoltaic access power distribution network scheme is drawn and parameter configuration, and then estimation device and construction investment, output photovoltaic access scheme;
Described photovoltaic access power distribution network program analysis evaluation module, read in the photovoltaic access scheme of photovoltaic access power distribution network conceptual design module output, access scheme assessment indicator system in the parameter-embedded appraisement system storehouse with case library of system, access scheme evaluation rule, evaluation criteria and index weight value in evaluation rule storehouse, the access scheme typical case who evaluates in case library evaluates case, complete the assessment of photovoltaic access scheme, adaptability and rationality to photovoltaic access scheme are made evaluation, output photovoltaic access scheme assessment result;
The described optimization planning module containing the active power distribution network of photovoltaic, the ripe data of reading data processing module output, network optimization model and the principle of optimality in the parameter-embedded Optimizing Model Base with case library of system, active power distribution network typical case programme in Planning Example storehouse, complete the optimization planning containing the active power distribution network of photovoltaic, export active Optimal Planning for Distribution scheme;
The described analysis and evaluation module containing the active power distribution network of photovoltaic, read in the active Optimal Planning for Distribution scheme containing the optimization planning module output of the active power distribution network of photovoltaic, the photovoltaic access scheme assessment result of photovoltaic access power distribution network program analysis evaluation module output, active power distribution network assessment indicator system in the parameter-embedded appraisement system storehouse with case library of system, active power distribution network evaluation rule in evaluation rule storehouse, evaluation criteria and index weight value, the active power distribution network typical case who evaluates in case library evaluates case, complete the comprehensive assessment containing the active power distribution network of photovoltaic, export active power distribution network synthesis assessment result,
Parameter-embedded and the case library of described system, comprises appraisement system storehouse, evaluation rule storehouse, evaluates case library, typical access scheme storehouse, Optimizing Model Base, Planning Example storehouse, and the data of storing are directly read by each module when needed, wherein:
Described appraisement system library storage access scheme assessment indicator system, active power distribution network assessment indicator system;
Described evaluation rule library storage access scheme evaluation rule, evaluation criteria and index weight value, active power distribution network evaluation rule, evaluation criteria and index weight value;
Described evaluation case library storage access scheme typical case evaluates case, and active power distribution network typical case evaluates case;
The grid-connected typical access scheme of described typical access scheme library storage;
Described Optimized model library storage power distribution network Optimized model and the principle of optimality;
The active power distribution network typical case of described Planning Example library storage programme.
Advantage and good effect that the present invention has are:
The present invention can meet conceptual design and the analysis and evaluation of photovoltaic access power distribution network, and contains the analysis and evaluation demand of the active power distribution network of photovoltaic, the feature of compatible domestic power distribution network infosystem and data, and support time series analysis.Simultaneously, the present invention adapts to the new situations of current China theCourse of PV Industry, can be the reasonable utilization of superfluous photovoltaic capacity resources and the instrument of facilitating of effectively dissolving of distributed power source, and provide support instrument for traditional power distribution network develops transition to following active-mode intelligent power distribution network.
Brief description of the drawings
Fig. 1 is structured flowchart of the present invention;
Fig. 2 is the workflow diagram of photovoltaic access power distribution network conceptual design module of the present invention;
Fig. 3 is the access scheme figure of photovoltaic access scheme of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be described in detail.
As shown in Figure 1, photovoltaic generation access power distribution network conceptual design of the present invention and analysis and evaluation backup system, comprise: basic data acquisition module, data processing module, photovoltaic access power distribution network conceptual design module, photovoltaic access power distribution network program analysis evaluation module, containing the optimization planning module of the active power distribution network of photovoltaic, containing the analysis and evaluation module of the active power distribution network of photovoltaic, the parameter-embedded and case library of system.Wherein:
Described basic data acquisition module, be responsible for obtaining the required external data of photovoltaic generation access power distribution network conceptual design and analysis and evaluation backup system, and according to conceptual design and analysis and evaluation demand, the data of these dispersions are carried out to information fusion splicing, formation base data storage;
Described data processing module, the basic data of being responsible for that basic data acquisition module is collected carries out data check reparation and the reduction of normal operating mode data is processed, and generates the ripe data that meet conceptual design and analysis and evaluation needs;
Described photovoltaic access power distribution network conceptual design module, read in the grid-connected typical access scheme in the parameter-embedded typical access scheme storehouse with case library of ripe data and system, the conceptual scheme that completes photovoltaic access power distribution network scheme is drawn and parameter configuration, and then estimation device and construction investment, output photovoltaic access scheme;
Described photovoltaic access power distribution network program analysis evaluation module, read in the photovoltaic access scheme of photovoltaic access power distribution network conceptual design module output, access scheme assessment indicator system in the parameter-embedded appraisement system storehouse with case library of system, access scheme evaluation rule, evaluation criteria and index weight value in evaluation rule storehouse, the typical case who evaluates in case library evaluates case, complete the assessment of photovoltaic access scheme, adaptability and rationality to photovoltaic access scheme are made evaluation, output photovoltaic access scheme assessment result;
The described optimization planning module containing the active power distribution network of photovoltaic, the ripe data of reading data processing module output, network optimization model and the principle of optimality in the parameter-embedded Optimizing Model Base with case library of system, active power distribution network typical case programme in Planning Example storehouse, complete the optimization planning containing the active power distribution network of photovoltaic, export active Optimal Planning for Distribution scheme;
The described analysis and evaluation module containing the active power distribution network of photovoltaic, read in the active Optimal Planning for Distribution scheme containing the optimization planning module output of the active power distribution network of photovoltaic, the photovoltaic access scheme assessment result of photovoltaic access power distribution network program analysis evaluation module output, active power distribution network assessment indicator system in the parameter-embedded appraisement system storehouse with case library of system, active power distribution network evaluation rule in evaluation rule storehouse, evaluation criteria and index weight value, the typical case who evaluates in case library evaluates case, complete the comprehensive assessment containing the active power distribution network of photovoltaic, export active power distribution network synthesis assessment result,
Parameter-embedded and the case library of described system, comprises appraisement system storehouse, evaluation rule storehouse, evaluates case library, typical access scheme storehouse, Optimizing Model Base, Planning Example storehouse, and the data of storing are directly read by each module when needed, wherein:
Described appraisement system library storage access scheme assessment indicator system, active power distribution network assessment indicator system;
Described evaluation rule library storage access scheme evaluation rule, evaluation criteria and index weight value, active power distribution network evaluation rule, evaluation criteria and index weight value;
Described evaluation case library storage access scheme typical case evaluates case, and active power distribution network typical case evaluates case;
The grid-connected typical access scheme of described typical access scheme library storage;
Described Optimized model library storage power distribution network Optimized model and the principle of optimality;
The active power distribution network typical case of described Planning Example library storage programme.
Described basic data acquisition module, comprises two submodules of data acquisition submodule and data fusion submodule, wherein:
Described data acquisition submodule, is responsible for commenting required external data from external data source acquisition scheme design and analysis.Drainage pattern comprises automatic acquisition, semi-automatic importing, manual typing.Required external data comprises two parts, and a part is the data in traditional power distribution network infosystem; Another part is still not have in traditional power distribution network infosystem, is but photovoltaic access Distribution system design and the necessary new forms of energy of analysis and evaluation and environment weather data.Data in tradition power distribution network infosystem comprise: the device attribute information that comes from power distribution network production system, equipment deficiency information, equipment test information, come from the Real-time Electrical Distribution Network Data of dispatch automated system, historical data, failure message, power information, plant stand topology information, method of operation information, come from the geographic map of Distribution power network GIS system, topological data, grid equipment spatial information, other geography information, come from the electric quantity data of marketing management system, user profile, user malfunction information, remote meter reading of electricity, manual metering, electricity price information, electricity charge information, come from the user malfunction information of customer service system, special circumstances information, come from large user's information on load of load control system, new forms of energy data comprise photovoltaic apparatus data, environment weather data comprise photometric data and temperature data.
Described data fusion submodule, by the data fusion of data level, merges the sporadic data splicing with logical interdependency and temporal correlation from outside different pieces of information source, basis of formation data, and with structural data and two kinds of form storages of graphic file.Described structural data is the data that can express by bivariate table structure; Described graphic file, adopt a kind of form of describing the geometry of spatial data and the non-topological entity vector data structure of attributive character of Shapefile(ESRI company), DXF(Drawing Exchange Format, autodesk, inc. exploitation for carrying out the cad data file form of cad data exchange between AutoCAD and other software), DWG(Drawing, the graphic file of AutoCAD) form.The basic data forming so still can not meet conceptual design and analysis and evaluation demand, also needs further processing, is therefore called again " raw data ".
Described data processing module, comprises data check reparation submodule and two submodules of normal operating mode data reduction submodule, wherein:
Described data check is repaired submodule, and basic data is carried out to database level verification and reparation, topological structure of electric verification and reparation, electric verification and reparation successively.Described verification is that correctness, rationality and associated validity to data are carried out verification according to rule; Described reparation, is to repair rule according to data, repairs incomplete, disappearance, abnormal data.Described database level verification and reparation, be to carry out according to the conformance definition in data dictionary, comprises verification and the reparation of field value in tables of data, and data validation and reparation between tables of data; Described topological structure of electric verification and reparation, be intended to find and the mistake of correcting topological relation, comprises electromagnetism ring and the verification of non-electromagnetism ring and reparation, and isolated island verification and reparation; Described electric verification and reparation, be to meet conceptual design and analysis and evaluation needs are object, based on topological structure of electric, and verification and reparation that the core parameter disappearances such as circuit, transformer, switch and apparent error are carried out.
Described normal operating mode data reduction submodule, information because of the present circumstance, reduces processing to not meeting the data of conceptual design and analysis and evaluation needs in basic data, obtains the rack and the load data that match with historical time section.Method of reducing comprises rack reduction, method of operation reduction and the reduction of many bores load.The reduction of described rack, is grid structure because of the present circumstance, restores the rack information of fixed time section according to rule, comprises line alignment, the mode of connection etc.; Described method of operation reduction, because planning generally need to be carried out based on power distribution network normal operating mode, and always there is gap with normal operating mode in the actual data of retaining, therefore need power distribution network normal operating mode because of the present circumstance, restore the normal operating mode of fixed time section electrical network according to rule, and the typical operation modes of historical time section; The reduction of described many bore loads, because load exists and do not mate with rack information, on the basis of repairing at historical load data check, need to reduce processing to deriving from the historical load of different channels and electric quantity data, according to rule, restore the information on load matching with grid structure and the power distribution network method of operation under fixed time section.Basic data through verification reparation and normal operating mode reduction processing becomes ripe data, can be directly used in conceptual design and analysis and evaluation.
Described photovoltaic access power distribution network conceptual design module, comprises access scheme rendering submodule, parameter configuration submodule, three submodules of investment estimate submodule, wherein:
Described access scheme rendering submodule on the basis of ripe data, is chosen suitable grid-connected typical access scheme as reference from typical access scheme storehouse, draws out the conceptual scheme of photovoltaic access scheme;
Described parameter configuration submodule, takes to carry out with the parameter of grid-connected typical access scheme the method for analogy, completes the configuration of all kinds of parameters of photovoltaic access scheme;
Described investment estimate submodule, equipment and construction investment to photovoltaic access scheme are estimated.
The concrete implementation step of photovoltaic access power distribution network conceptual design module is as follows: first select suitable typical access scheme template according to the situation of the scale of the photovoltaic power generation apparatus of power distribution network to be accessed, access point, then draw out access scheme figure in conjunction with concrete applied environment; Then carry out parameter configuration; By carrying out the basic calculation such as trend, short circuit, harmonic wave, the photovoltaic access scheme of design is carried out to safe reliability verification afterwards; If can not meet the demands, first all kinds of parameters of access scheme are modified, still cannot meet the demands time, again scheme is modified, until meet correlation technique regulation with the requirement of power distribution network safe and reliable operation and by verification; Finally the equipment to access scheme and construction investment are estimated, output photovoltaic access scheme.
Described photovoltaic access power distribution network program analysis evaluation module, read in after its input data, sort run sunykatuib analysis when docking power distribution network after photovoltaic and carrying out, analysis result and the power distribution network situation accessing before photovoltaic are contrasted, angle from photovoltaic access to distribution power flow, the quality of power supply, power distribution network scheduling and operation control effect, adaptability and the rationality of the designed photovoltaic access scheme of analysis and evaluation, output photovoltaic access scheme assessment result.
The described optimization planning module containing the active power distribution network of photovoltaic, mainly for problem and following growth requirement of present situation power distribution network, completes distribution system planning and improvement scheme.Read in after its input data, carry out successively total load prediction, Spatial Load Forecasting, substation locating and sizing, rack optimization planning, export active Optimal Planning for Distribution scheme.
The described analysis and evaluation module containing the active power distribution network of photovoltaic, comprise Reliability Evaluation submodule, electricity quality evaluation submodule, assessment of economic benefit submodule, effects of energy saving and emission reduction assessment submodule, photo-voltaic power supply receiving capability evaluation submodule, six submodules of active power distribution network synthesis assessment submodule, wherein:
Described Reliability Evaluation submodule, mainly the angle on power supply reliability impact from photovoltaic access, taking feeder line, feeder line group as unit, analyzes the power supply reliability containing the active power distribution network of photovoltaic;
Described electricity quality evaluation submodule, mainly exerts oneself the angle assessment of the impact of undulatory property on voltage, harmonic wave that photovoltaic DC-to-AC converter produces containing the quality of power supply of the active power distribution network of photovoltaic from photovoltaic;
Described assessment of economic benefit submodule, the main aspect such as investment, the operating cost analysis and evaluation from photovoltaic access scheme is containing the economic benefit of the active power distribution network of photovoltaic;
Described effects of energy saving and emission reduction assessment submodule, mainly from reducing environmental pollution, reducing the effects of energy saving and emission reduction of the aspect assessments such as carbon emission containing the active power distribution network of photovoltaic;
Described photo-voltaic power supply is received capability evaluation submodule, receive the maximum of photovoltaic to receive safely capability problems for power distribution network, access the impact on aspects such as distribution network voltage, electric current, harmonic wave, reliabilities by comprehensive analysis photovoltaic, draw the admissible photovoltaic max cap. of power distribution network;
Described active power distribution network synthesis assessment submodule, the assessment result of receiving capability evaluation according to Reliability Evaluation, electricity quality evaluation, assessment of economic benefit, effects of energy saving and emission reduction assessment, photo-voltaic power supply, carry out comprehensive assessment with reference to active power distribution network evaluation criteria, export active power distribution network synthesis assessment result.
When the present invention works, basic data acquisition module is responsible for carrying out alternately with outside each data source, wherein data acquisition submodule obtains conceptual design and the required data of analysis and evaluation from external data source, data fusion submodule has these sporadic data splicing fusion of logical interdependency and temporal correlation in the data from different pieces of information source, basis of formation data, and with structural data and two kinds of form storages of graphic file.
Data processing module, reads in basic data, is responsible for the basic data collecting to carry out data check reparation and normal operating mode data reduction processing.Wherein data check reparation submodule carries out database level verification and reparation, topological structure of electric verification and reparation, electric verification and reparation successively to basic data; Normal operating mode data reduction submodule, according to conceptual design and analysis and evaluation requirement, information reverting goes out the rack and the load data that match with historical time section because of the present circumstance, comprises rack reduction, method of operation reduction and the reduction of many bores load.Basic data through verification reparation and normal operating mode reduction processing becomes ripe data, can be directly used in conceptual design and analysis and evaluation.
Photovoltaic access power distribution network conceptual design module, read in ripe data, and read in grid-connected typical access scheme from typical access scheme storehouse, carry out successively that typical access scheme library template is chosen, access scheme figure drafting, parameter configuration, analysis verification, scheme modifying, finally complete conceptual design and the parameter configuration of photovoltaic access power distribution network, carry out equipment and construction investment estimation.Output photovoltaic access scheme.
Photovoltaic access power distribution network program analysis evaluation module, read in the photovoltaic access scheme of photovoltaic access power distribution network conceptual design module output, access scheme assessment indicator system in appraisement system storehouse, access scheme evaluation rule in evaluation rule storehouse, evaluation criteria and index weight value, the access scheme typical case who evaluates in case library evaluates case, sort run sunykatuib analysis when docking power distribution network after photovoltaic and carrying out, analysis result and the power distribution network situation accessing before photovoltaic are contrasted, access distribution power flow from photovoltaic, the quality of power supply, the angle of power distribution network scheduling and operation control effect, adaptability and the rationality of the designed photovoltaic access scheme of analysis and evaluation, output photovoltaic access scheme assessment result.
Containing the optimization planning module of the active power distribution network of photovoltaic, the ripe data of reading data processing module output, network optimization model and the principle of optimality in Optimizing Model Base, active power distribution network typical case programme in Planning Example storehouse, carry out successively total load prediction, Spatial Load Forecasting, substation locating and sizing, rack optimization planning, export active Optimal Planning for Distribution scheme.
Containing the analysis and evaluation module of the active power distribution network of photovoltaic, read in the active Optimal Planning for Distribution scheme containing the optimization planning module output of the active power distribution network of photovoltaic, the photovoltaic access scheme assessment result of photovoltaic access power distribution network program analysis evaluation module output, active power distribution network assessment indicator system in appraisement system storehouse, active power distribution network evaluation rule in evaluation rule storehouse, evaluation criteria and index weight value, the active power distribution network typical case who evaluates in case library evaluates case, contain the comprehensive assessment of the active power distribution network of photovoltaic, specifically from Reliability Evaluation, electricity quality evaluation, assessment of economic benefit, effects of energy saving and emission reduction assessment, photo-voltaic power supply receives five aspects of capability evaluation to assess respectively, finally assess submodule by comprehensive the assessment result of five aspects by active power distribution network synthesis, export active power distribution network synthesis assessment result.
The present embodiment is for conceptual design and the analysis and evaluation of a photovoltaic generation project access distribution network engineering, and the analysis and evaluation of photovoltaic access rear region power distribution network.This project is installed solar energy photovoltaic generator for certain company utilizes one to No. four workshop roof in factory, the about 2.1MW of total volume, and institute's electricity is personal, and superior electrical network does not send.The present embodiment is implemented as prerequisite taking technical solution of the present invention, has provided detailed embodiment and process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 2, the specific works flow process of access scheme rendering submodule of the present invention is: first read in ripe data, and grid-connected typical access scheme in typical access scheme storehouse, access scheme rendering submodule is to input data analysis, select suitable typical access scheme template through analogy, determine that the photovoltaic power generation apparatus of the present embodiment answers access user 380V power distribution cabinet, photovoltaic generation is directly to load power supply, on-site elimination, and by customer substation 10kV circuit access utility network.Then draw out access scheme figure: the solar energy system in four workshops, through inverter, first gathers and is connected to the 380V bus of photovoltaic generating system separately, then access respectively the low-pressure side bus of certain 10kV subscriber station by 380V circuit; For in-situ balancing photovoltaic generation capacity and power load better, consider the photovoltaic generating system access user station #1 main transformer in workshop one and workshop three, the photovoltaic generating system access user station #2 main transformer in workshop two and workshop four, as shown in Figure 3; Parameter configuration submodule completes the configuration of all kinds of parameters of access scheme subsequently; Then pass through the basic calculation such as trend, short circuit, harmonic wave, the safe reliability of the designed scheme of verification, and constantly revise parameter configuration or redesign scheme, until meet correlation technique regulation and the requirement of power distribution system secure reliability service; Investment estimate submodule is estimated the investment of the needed apparatus body of the present embodiment and protection, power distribution automation, the secondary device such as communicate by letter.Finally export photovoltaic access scheme.
The photovoltaic access scheme designing in the present embodiment is carried out to the result that analysis and evaluation obtains as follows.Analysis and evaluation is mainly carried out from active balance, reactive balance, voltage fluctuation, harmonics level equal angles, has verified adaptability and the rationality of designed photovoltaic access scheme, has also found the detailed problem that some are profound simultaneously:
1. the institute of the photovoltaic power generation apparatus in the present embodiment electricity is personal, and the not superior electrical network energy of falling power transmission, reaches spontaneous self-equilibrating; But time sort run analog simulation show, the not exclusive segment period, in the less situation of power load, occur that electric power send to electrical network, thereby cause reverse-power protection action, therefore advise meritorious the exerting oneself of photovoltaic generating system to follow the tracks of control, reduce as far as possible the meritorious frequency of sending reverse-power protection action;
2. the variation of the photovoltaic power generation apparatus active power in the present embodiment maximal value is about 0.16MW, meets the upper limit requirement of 0.2MW in " State Grid Corporation of China's photovoltaic plant access electric power network technique specifies ";
3. under 2 main transformers, send trend to reduce under normal circumstances, be conducive to reduce power distribution network reactive loss; But simultaneously because solar electrical energy generation power factor is higher, be generally pure gaining merit, therefore the available reactive power of the photovoltaic power generation apparatus in the present embodiment is limited, requires power distribution network to provide reactive power support for it;
4. as calculated, when photovoltaic power generation apparatus in the present embodiment excises suddenly, the voltage fluctuation that causes the 10kV of Tu3Zhong transformer station bus, certain subscriber station 10kV bus and 380V bus is all less than 1%, and wherein the variation of 380V busbar voltage is about 0.5%, in aforementioned code allowed band;
5. the harmonic wave total amount that the photovoltaic power generation apparatus in the present embodiment injects power distribution network total percent harmonic distortion limit value of nominal voltage 10kV 4.0% in, but still need install equipment for monitoring power quality additional with the tie point of public electric wire net, monitor it and whether meet correlation technique directive/guide and technical stipulation, if do not met, need take to install additional the corresponding measures such as filter, avoid the quality of power supply of utility network to pollute.
The present embodiment proves, described photovoltaic generation access power distribution network conceptual design and analysis and evaluation backup system can be designed and meet the photovoltaic access scheme that correlation technique specifies; Can also, by carrying out analysis and evaluation containing the active power distribution network of photovoltaic, receive distributed power source for power distribution network deeper suggestion is provided.
Claims (7)
1. a photovoltaic generation accesses power distribution network conceptual design and analysis and evaluation backup system, it is characterized in that: comprising: basic data acquisition module, data processing module, photovoltaic access power distribution network conceptual design module, photovoltaic access power distribution network program analysis evaluation module, containing the optimization planning module of the active power distribution network of photovoltaic, containing the analysis and evaluation module of the active power distribution network of photovoltaic, the parameter-embedded and case library of system; Wherein:
Described basic data acquisition module, be responsible for obtaining the required external data of photovoltaic generation access power distribution network conceptual design and analysis and evaluation backup system, and according to conceptual design and analysis and evaluation demand, the data of these dispersions are carried out to information fusion splicing, formation base data storage;
Described data processing module, the basic data of being responsible for that basic data acquisition module is collected carries out data check reparation and the reduction of normal operating mode data is processed, and generates the ripe data that meet conceptual design and analysis and evaluation needs;
Described photovoltaic access power distribution network conceptual design module, read in the grid-connected typical access scheme in the parameter-embedded typical access scheme storehouse with case library of ripe data and system, the conceptual scheme that completes photovoltaic access power distribution network scheme is drawn and parameter configuration, and then estimation device and construction investment, output photovoltaic access scheme;
Described photovoltaic access power distribution network program analysis evaluation module, read in the photovoltaic access scheme of photovoltaic access power distribution network conceptual design module output, access scheme assessment indicator system in the parameter-embedded appraisement system storehouse with case library of system, access scheme evaluation rule, evaluation criteria and index weight value in evaluation rule storehouse, the access scheme typical case who evaluates in case library evaluates case, complete the assessment of photovoltaic access scheme, adaptability and rationality to photovoltaic access scheme are made evaluation, output photovoltaic access scheme assessment result;
The described optimization planning module containing the active power distribution network of photovoltaic, the ripe data of reading data processing module output, network optimization model and the principle of optimality in the parameter-embedded Optimizing Model Base with case library of system, active power distribution network typical case programme in Planning Example storehouse, complete the optimization planning containing the active power distribution network of photovoltaic, export active Optimal Planning for Distribution scheme;
The described analysis and evaluation module containing the active power distribution network of photovoltaic, read in the active Optimal Planning for Distribution scheme containing the optimization planning module output of the active power distribution network of photovoltaic, the photovoltaic access scheme assessment result of photovoltaic access power distribution network program analysis evaluation module output, active power distribution network assessment indicator system in the parameter-embedded appraisement system storehouse with case library of system, active power distribution network evaluation rule in evaluation rule storehouse, evaluation criteria and index weight value, the active power distribution network typical case who evaluates in case library evaluates case, complete the comprehensive assessment containing the active power distribution network of photovoltaic, export active power distribution network synthesis assessment result,
Parameter-embedded and the case library of described system, comprises appraisement system storehouse, evaluation rule storehouse, evaluates case library, typical access scheme storehouse, Optimizing Model Base, Planning Example storehouse, and the data of storing are directly read by each module when needed, wherein:
Described appraisement system library storage access scheme assessment indicator system, active power distribution network assessment indicator system;
Described evaluation rule library storage access scheme evaluation rule, evaluation criteria and index weight value, active power distribution network evaluation rule, evaluation criteria and index weight value;
Described evaluation case library storage access scheme typical case evaluates case, and active power distribution network typical case evaluates case;
The grid-connected typical access scheme of described typical access scheme library storage;
Described Optimized model library storage power distribution network Optimized model and the principle of optimality;
The active power distribution network typical case of described Planning Example library storage programme.
2. photovoltaic generation access power distribution network conceptual design according to claim 1 and analysis and evaluation backup system, is characterized in that: described basic data acquisition module, comprise two submodules of data acquisition submodule and data fusion submodule, wherein:
Described data acquisition submodule, is responsible for the required external data of acquisition scheme design and analysis and evaluation, and drainage pattern comprises: automatic acquisition, semi-automatic importing, manual typing, required external data comprises: the device attribute information that comes from power distribution network production system, equipment deficiency information, equipment test information, comes from the Real-time Electrical Distribution Network Data of dispatch automated system, historical data, failure message, power information, plant stand topology information, method of operation information, comes from the geographic map of Distribution power network GIS system, topological data, grid equipment spatial information, other geography information, come from the electric quantity data of marketing management system, user profile, user malfunction information, remote meter reading of electricity, manual metering, electricity price information, electricity charge information, comes from the user malfunction information of customer service system, special circumstances information, comes from large user's information on load of load control system, the new forms of energy data such as photovoltaic apparatus data, photometric data, the environment weather data such as temperature data,
Described data fusion submodule, by the data fusion of data level, merges the sporadic data splicing with logical interdependency and temporal correlation from outside different pieces of information source, basis of formation data, and with structural data and two kinds of form storages of graphic file.
3. photovoltaic generation access power distribution network conceptual design according to claim 1 and analysis and evaluation backup system, it is characterized in that: described data processing module, comprise data check reparation submodule and two submodules of normal operating mode data reduction submodule, wherein:
Described data check is repaired submodule, and the basic data that basic data acquisition module is collected is carried out database level verification and reparation, topological structure of electric verification and reparation, electric verification and reparation successively;
Described normal operating mode data reduction submodule, information because of the present circumstance, reduce processing to not meeting the data of conceptual design and analysis and evaluation needs in basic data, obtain the rack and the load data that match with historical time section, method of reducing comprises rack reduction, method of operation reduction and the reduction of many bores load, and the basic data that process verification reparation and normal operating mode reduction are processed becomes ripe data.
4. photovoltaic generation access power distribution network conceptual design according to claim 1 and analysis and evaluation backup system, it is characterized in that: described photovoltaic access power distribution network conceptual design module, comprise access scheme rendering submodule, parameter configuration submodule, three submodules of investment estimate submodule, wherein:
Described access scheme rendering submodule on the basis of ripe data, is chosen suitable grid-connected typical access scheme as reference from typical access scheme storehouse, draws out the conceptual scheme of photovoltaic access scheme;
Described parameter configuration submodule, takes to carry out with the parameter of grid-connected typical access scheme the method for analogy, completes the configuration of all kinds of parameters of photovoltaic access scheme;
Described investment estimate submodule, equipment and construction investment to photovoltaic access scheme are estimated.
5. photovoltaic generation access power distribution network conceptual design according to claim 1 and analysis and evaluation backup system, it is characterized in that: described photovoltaic access power distribution network program analysis evaluation module, read in after its input data, sort run sunykatuib analysis when docking power distribution network after photovoltaic and carrying out, analysis result and the power distribution network situation accessing before photovoltaic are contrasted, access distribution power flow from photovoltaic, the quality of power supply, the angle of power distribution network scheduling and operation control effect, adaptability and the rationality of the designed photovoltaic access scheme of analysis and evaluation, output photovoltaic access scheme assessment result.
6. photovoltaic generation access power distribution network conceptual design according to claim 1 and analysis and evaluation backup system, it is characterized in that: the described optimization planning module containing the active power distribution network of photovoltaic, read in after its input data, complete successively total load prediction, Spatial Load Forecasting, substation locating and sizing, rack optimization planning, export active Optimal Planning for Distribution scheme.
7. photovoltaic generation access power distribution network conceptual design according to claim 1 and analysis and evaluation backup system, it is characterized in that: the described analysis and evaluation module containing the active power distribution network of photovoltaic, comprise Reliability Evaluation submodule, electricity quality evaluation submodule, assessment of economic benefit submodule, effects of energy saving and emission reduction assessment submodule, photo-voltaic power supply receiving capability evaluation submodule, six submodules of active power distribution network synthesis assessment submodule, wherein:
Described Reliability Evaluation submodule, mainly the angle on power supply reliability impact from photovoltaic access, taking feeder line, feeder line group as unit, analyzes the power supply reliability containing the active power distribution network of photovoltaic;
Described electricity quality evaluation submodule, mainly exerts oneself the angle assessment of the impact of undulatory property on voltage, harmonic wave that photovoltaic DC-to-AC converter produces containing the quality of power supply of the active power distribution network of photovoltaic from photovoltaic;
Described assessment of economic benefit submodule, the mainly economic benefit containing the active power distribution network of photovoltaic from aspect analysis and evaluations such as construction investment expense and operating costs;
Described effects of energy saving and emission reduction assessment submodule, mainly from reducing environmental pollution, reducing the effects of energy saving and emission reduction of the aspect assessments such as carbon emission containing the active power distribution network of photovoltaic;
Described photo-voltaic power supply is received capability evaluation submodule, receive the maximum of photovoltaic to receive safely capability problems for power distribution network, access the impact on aspects such as distribution network voltage, electric current, harmonic wave, reliabilities by comprehensive analysis photovoltaic, draw the admissible photovoltaic max cap. of power distribution network;
Described active power distribution network synthesis assessment submodule, the assessment result of receiving capability evaluation according to Reliability Evaluation, electricity quality evaluation, assessment of economic benefit, effects of energy saving and emission reduction assessment, photo-voltaic power supply, carry out comprehensive assessment with reference to active power distribution network evaluation criteria, export active power distribution network synthesis assessment result.
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