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GB/T 39854-2021: Specification of performance evaluation for photovoltaic power station Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
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Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT39854-2021(Technical Specification for Performance Evaluation of Photovoltaic Power Stations) ICS 27.160 F12 National Standards of People's Republic of China Technical Specification for Performance Evaluation of Photovoltaic Power Stations Released on 2021-03-09 2021-10-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee Table of ContentsForeword Ⅰ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Basic regulations 2 5 Basic information review 2 6 On-site quality assessment 2 7 Power generation performance evaluation 3 8 Grid-connected performance evaluation 5 9 Availability evaluation 7 Appendix A (Informative Appendix) Basic Information of Photovoltaic Power Stations 10 Appendix B (Normative Appendix) Inspection of Construction Documents for Photovoltaic Power Station Project 12 Appendix C (informative appendix) Statistical information of photovoltaic power station operation documents 14 Appendix D (Normative Appendix) Compliance Check of Photovoltaic Power Station 16 Appendix E (informative appendix) Standard electrical efficiency correction method 18 Appendix F (informative appendix) Diagram 19 of the state division of photovoltaic power station/photovoltaic power unit Preface This standard was drafted in accordance with the rules given in GB/T 1.1-2009. Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying these patents. This standard was proposed and managed by the China Electricity Council. This standard was drafted. China Electric Power Research Institute Co., Ltd., China Energy Construction Group Xinjiang Electric Power Design Institute Co., Ltd. The main drafters of this standard. Zhang Junjun, Wu Fubao, Chen Zhilei, Li Hongtao, Zhang Shuangqing, Liu Meiyin, Dong Wei, Wang Zhixin, Lu Pingyang, Zhou Chang, Zhang Xiaolin, Liu Yanzhang, Guo Chongyang. Technical Specification for Performance Evaluation of Photovoltaic Power Stations 1 Scope This standard specifies the basic data review, site quality, power generation performance, grid connection performance and availability of photovoltaic power station performance evaluation. Evaluation requirements. This standard applies to new, rebuilt and expanded grid-connected photovoltaic power stations with voltage levels of 380V and above. 2 Normative references The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 12326 Power quality voltage fluctuation and flicker GB/T 14549 Power quality public grid harmonics GB/T 15543 Power quality three-phase voltage unbalance GB/T 19964 Technical Regulations for Connecting Photovoltaic Power Stations to Power Systems GB/T 24337 Power Quality Interharmonics in Public Grid GB/T 29319 Technical Regulations for Connecting Photovoltaic Power Generation System to Distribution Network GB/T 30152 Inspection Regulations for Connecting Photovoltaic Power Generation System to Distribution Network GB/T 31365 Inspection Regulations for Connecting Photovoltaic Power Stations to the Grid GB/T 32826 Guidelines for Modeling Photovoltaic Power Generation System GB/T 32892 Photovoltaic power generation system model and parameter test procedure GB 50796 Specification for Acceptance of Photovoltaic Power Generation Projects GB 50797 Design Code for Photovoltaic Power Stations GB/T 39857 Technical Specification for Photovoltaic Power Generation Efficiency 3 Terms and definitions The following terms and definitions apply to this document. 3.1 Ratedcapacity The sum of the rated power of the inverters installed in the photovoltaic power station. 3.2 System efficiency systemefficiency The ratio of the total power output of a photovoltaic power station within a certain period of time to the total radiation absorbed by the inclined surface of the photovoltaic module. 3.3 System energy efficiency systemperformanceratio The ratio of the equivalent utilization hours of the photovoltaic power station in a certain period of time to the peak sunshine hours of the inclined surface of the photovoltaic module. 3.4 Electrical efficiency The ratio of the total power output by the photovoltaic power station to the total installed capacity of photovoltaic power station components. 4 Basic regulations 4.1 The performance evaluation of photovoltaic power stations shall include power generation performance evaluation, grid connection performance evaluation and availability evaluation. 4.2 The basic data inspection should be carried out after the project is completed and accepted. The on-site quality assessment can be carried out during the construction process or after the completion of the project. The evaluation should be carried out after the completion acceptance, the grid connection performance evaluation should be carried out after the grid connection acceptance, and the availability evaluation should be carried out one year after the completion acceptance Unfold. 4.3 The performance evaluation of photovoltaic power stations can be carried out through data review, on-site inspection, on-site testing, and modeling and simulation. 4.4 After the completion of the performance evaluation of the photovoltaic power station, an evaluation report shall be issued. 5 Basic information review 5.1 Basic data content The content of the basic information review shall include the basic information of the photovoltaic power station, project construction documents and operating documents. 5.2 Basic information Before the basic data review, the basic information of the photovoltaic power station should be collected. For basic information, please refer to Appendix A. 5.3 Project construction documents The project construction documents should be checked. The project construction documents include the preliminary documents of the project construction, the project construction documents and the grid-connected acceptance documents The inspection requirements shall be carried out in accordance with Appendix B. 5.4 Run the file The operating documents of the photovoltaic power station should be checked and recorded. The operating documents include the basic information of the photovoltaic power generation unit and the monthly events of the photovoltaic power generation unit Information, weather data information, power generation data information, operation and maintenance personnel information, operation and maintenance equipment information, and spare parts information. Please refer to the attachment for inspection records Record C. 6 On-site quality assessment 6.1 Evaluation content On-site quality assessment includes appearance quality inspection, conformity inspection, safety inspection, etc. 6.2 Appearance quality inspection 6.2.1 The on-site lightning protection, fire protection and security measures for photovoltaic power stations, the appearance quality of buildings/structures and related equipment shall comply with GB 50796 The relevant equipment should include but not limited to components, combiner boxes, brackets, inverters, transformers, and cables. 6.2.2 The inspection content of the components should include foreign matter residue, yellowing of the film, discoloration of the battery, broken battery, deformation of the back plate, bubbling, cracking, and wiring. Phenomenon such as box falling off and visible hot spots. 6.2.3 The inspection content of the combiner box shall include the standardization of identification, cleanliness in the combiner box, anti-corrosion measures, anti-rust measures, anti-exposure measures, and box body protection. Protection level, lightning protection device, output circuit isolation protection measures, hot spot conditions, installation position standardization, box and bracket connection firmness, gold It belongs to the grounding reliability of the box combiner box, the installation height and level, and the standardization of the combiner box's positive and negative connections. 6.2.4 The inspection content of the inverter includes the concentration of the inverter and the layout of the machine room, the ventilation measures of the machine room, the standardization of the marking, and the cleaning of the inverter machine room. Cleanliness, grounding reliability. 6.2.5 The inspection content of the bracket includes bracket installation form, bracket material, anti-corrosion grade, anti-corrosion measures, wind resistance, square array azimuth, square array inclination. 6.2.6 Transformer inspection content includes transformer grounding standardization, identification standardization, installation location, installation method, and heat dissipation measures. 6.2.7 The content of the cable inspection includes the rationality of laying methods such as piercing, bundling, and burying in the ground. 6.3 Compliance check 6.3.1 Inspect and record photovoltaic power station components, combiner boxes, brackets, inverters, transformers, cables, reactive power compensation devices, monitoring systems, light Power prediction system, high and low voltage power distribution device, environmental monitoring device and other technical parameters, equipment quantity and design technical agreement consistency, check and record The recording is carried out in accordance with Appendix D. 6.3.2 Check and record the installation capacity of photovoltaic power station, the ratio of module capacity to inverter capacity, photovoltaic module installation, bracket installation, square array Foundation, photovoltaic array arrangement and installation, AC/DC cable installation, combiner box installation, inverter installation, transformer installation, high and low voltage power distribution Installation of equipment, installation of reactive power compensation equipment, environmental monitoring equipment, inspection and recording shall be carried out in accordance with Appendix D. 6.4 Safety inspection The safety inspection of lightning protection and grounding, protection system, fire protection measures, flood prevention and flood prevention of photovoltaic power station shall meet the requirements of GB 50797. 7 Power generation performance evaluation 7.1 Evaluation content The evaluation of power generation performance should include the analysis of solar resources of photovoltaic power stations, historical power generation analysis, efficiency evaluation of photovoltaic power stations, medium and long-term Pre-assessment of power generation. 7.2 Analysis of Solar Energy Resources 7.2.1 Collect solar resource monitoring data such as irradiance, temperature, wind speed and other local photovoltaic power stations. 7.2.2 Compare and analyze the collected meteorological data with the meteorological data in the design documents, and analyze the installation trend of photovoltaic power plants in combination with the on-site inspection. The rationality of angle and design selection. 7.3 Analysis of historical power generation Calculate the monthly equivalent utilization hours and annual equivalent utilization hours of photovoltaic power stations/photovoltaic power generation units, and statistically analyze the monthly and annual equivalent utilization hours of each photovoltaic power generation unit. The difference in annual power generation. 7.4 Evaluation of the efficiency of photovoltaic power stations 7.4.1 Evaluation content The efficiency evaluation should include system efficiency, system energy efficiency and electrical efficiency. 7.4.2 System efficiency The system efficiency evaluation should be carried out by means of on-site testing, and the test cycle should be more than one week continuous. The meteorological test device and the power generation test The device should be kept in sync. The efficiency of the photovoltaic power station system should be calculated according to formula (1). 7.4.3 System energy efficiency The system energy efficiency evaluation should be carried out by means of on-site testing, and the test cycle should be more than one week. The meteorological test device and the power generation test The installation should be kept synchronized, and the energy efficiency of the photovoltaic power station system is calculated according to formula (2). 7.4.4 Electrical efficiency The electrical efficiency evaluation should be carried out by means of on-site testing, and the test results should cover the data of the test with an irradiance above 800W/m2. The electrical efficiency of a high-voltage power station should be calculated according to formula (3). The electrical efficiency of photovoltaic power plants is affected by the ambient temperature. In order to eliminate the influence of temperature, standard electrical efficiency can be used for evaluation. Refer to Appendix E for the efficiency correction method. 7.4.5 Key factors affecting the power generation efficiency of photovoltaic power stations The evaluation of key factors affecting the power generation efficiency of photovoltaic power stations include photovoltaic module efficiency, photovoltaic module series mismatch rate, and photovoltaic modules in series and parallel. 7.5 Mid- to long-term power generation pre-assessment The calculation of the pre-assessed power generation of photovoltaic power stations is shown in equation (4). Hour per square meter (kW·h/m2); PR0 --- The system energy efficiency calculated based on the operating data of the photovoltaic power station in the past 12 months. 8 Grid-connected performance evaluation 8.1 Evaluation content Grid-connected photovoltaic power plants connected to the public grid through a voltage level of 35kV and above, and grid-connected photovoltaic power plants connected to the public grid through a voltage level of 10kV The ability assessment should include but not limited to the following. ---Power Quality; ---Active power control; ---Reactive power capacity; ---Reactive power control; ---Fault ride-through; ---Frequency adaptability. The performance evaluation application of photovoltaic power station connected to the power grid through 380V voltage level and 10(6)kV voltage level on the user side Including but not limited to the following. ---Power Quality; ---Active power control; ---Reactive power control; ---Voltage adaptability; ---Frequency adaptability; ---Anti-islanding protection. 8.2 Power quality 8.2.1 Three-phase voltage unbalance The assessment should be carried out as follows. a) Test the voltage and current data of the grid-connected point of the photovoltaic power station, and the test should be based on the minimum power from the continuous normal operation of the photovoltaic power station. At the beginning, 10% of the installed capacity is used as an interval for classification, and each interval should not be less than 10 minutes, and the end of the last interval Click to take the maximum power of the continuous and normal operation of the photovoltaic power station on the measurement day. b) Evaluate the three-phase voltage unbalance value calculated based on the test data. The calculation result should meet the requirements of GB/T 15543. 8.2.2 Flicker The assessment should be carried out as follows. a) Test the voltage and current data of the grid-connected point of the photovoltaic power station, and the test should be based on the minimum power from the continuous normal operation of the photovoltaic power station. At the beginning, 10% of the installed capacity is used as an interval for classification, and each interval should not be less than 10 minutes, and the end of the last interval Click to take the maximum power of the continuous and normal operation of the photovoltaic power station on the measurement day. b) Evaluate the flicker value calculated based on the test data, and the calculation result should meet the requirements of GB/T 12326. 8.2.3 Current harmonics The assessment should be carried out as follows. a) Test the voltage and current data of the grid-connected point of the photovoltaic power station, and the test should be based on the minimum power from the continuous normal operation of the photovoltaic power station. At the beginning, 10% of the installed capacity is used as an interval for classification, and each interval should not be less than 10 minutes, and the end of the last interval Click to take the maximum power of the continuous and normal operation of the photovoltaic power station on the measurement day. b) Evaluate the current harmonic value calculated based on the test data, and the calculation result should meet the requirements of GB/T 14549. 8.2.4 Current interharmonics The assessment should be carried out as follows. a) Test the voltage and current data of the grid-connected point of the photovoltaic power station, and the test should be based on the minimum power from the continuous normal operation of the photovoltaic power station. At the beginning, 10% of the installed capacity is used as an interval for classification, and each interval should not be less than 10 minutes, and the end of the last interval Click to take the maximum power of the continuous and normal operation of the photovoltaic power station on the measurement day. b) Evaluate the current interharmonic value calculated based on the test data, and the calculation result should meet the requirements of GB/T 24337. 8.3 Changes in active power The assessment should be carried out as follows. a) Test the active power of the photovoltaic power station. The test should include automatic start and stop of the photovoltaic power station with irradiance and manual start and stop. Working conditions; b) Evaluate the active power change value calculated based on the test data. The calculation result should meet the requirements of GB/T 19964. 8.4 Active power control 8.4.1 Grid-connected photovoltaic power plants connected to the public grid through a voltage level of 35kV and above, and grid-connected photovoltaic power stations connected to the public grid through a voltage level of 10kV Performance should be evaluated according to the method specified in GB/T 31365, and the active power control should meet the relevant requirements of GB/T 19964. 8.4.2 The performance of the photovoltaic power station connected to the grid through 380V voltage level and the user side through 10(6)kV voltage level should be According to the method specified in GB/T 30152, the active power control should meet the relevant requirements of GB/T 29319. 8.5 Reactive power capacity The reactive power capacity should be evaluated according to the method specified in GB/T 31365, and the reactive power capacity should meet the relevant requirements of GB/T 19964. 8.6 Reactive power control 8.6.1 Grid-connected photovoltaic power stations connected to the public grid through a voltage level of 35kV and above, and grid-connected photovoltaic power stations connected to the public grid through a voltage level of 10kV Performance evaluation should be evaluated according to the method specified in GB/T 31365, and the reactive power control capability should comply with the relevant requirements of GB/T 19964. Claim. 8.6.2 Performance evaluation of the photovoltaic power station connected to the power grid through 380V voltage level and 10(6)kV voltage level on the user side It should be evaluated according to the method specified in GB/T 30152, and the reactive power control capability should meet the relevant requirements of GB/T 29319. 8.7 Fault ride-through The fault ride-through performance should be evaluated by the method of modeling and simulation of the whole station, and the fault ride-through performance should meet the requirements of GB/T 19964. The simulation model and parameters should meet the requirements of GB/T 32892 and GB/T 32826. 8.8 Frequency adaptability The frequency adaptability should be evaluated by the method of whole station modeling and simulation, and the frequency adaptability should meet the requirements of GB/T 19964. The simulation model and parameters should meet the requirements of GB/T 32892 and GB/T 32826. 8.9 Voltage adaptability The voltage adaptability should be evaluated according to the method specified in GB/T 30152, and the voltage adaptability should meet The relevant requirements of GB/T 29319. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 39854-2021 be delivered?Answer: The full copy PDF of English version of GB/T 39854-2021 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 39854-2021_English with my colleagues?Answer: Yes. 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