GB/T 42477-2023 in English

1. Background and significance of standard formulation

With the rapid development of photovoltaic power generation around the world, the accurate assessment and efficient use of solar energy resources have become key factors in promoting the construction of photovoltaic power stations. The formulation of the "Technical Specifications for Meteorological Observation and Data Review and Correction of Photovoltaic Power Stations" aims to ensure the accuracy, completeness and representativeness of meteorological observation data of photovoltaic power stations, and provide a scientific basis for solar resource assessment, power generation prediction and post-station evaluation.

2. Requirements for meteorological observation station sites

Representativeness:The observation station site should accurately reflect the meteorological conditions of the area where the photovoltaic power station is located, and avoid interference from local factors.

Environmental requirements:The observation site needs to be flat and open, ensuring no shielding and no reflection, and meet the requirements of 4.3 in GB/T35231-2017.

3. Observation instruments and technical requirements

global pyranometer and Direct pyrheliometer must meet the second-level performance indicators to ensure measurement accuracy.

High-precision sensors are required to measure the temperature of the back panel of photovoltaic modules, meeting the requirements of accurate measurement within the range of -40℃~100℃.

4. Data review and interpolation method

5. Data correction and application suggestions

Technology evolution analysis: From measured data to representative year correction, it is necessary to combine long series data (national radiation station data is given priority) for correction.

Implementation suggestions: Photovoltaic power stations should plan meteorological observation systems at the initial stage of construction and calibrate instruments regularly to ensure long-term stable operation.