GB/T 33677-2017 in English

1. Standard Scope and Reference Documents

This standard applies to the evaluation and zoning of direct solar radiation resources, involving key terms such as total radiation, irradiance, and irradiance. The main referenced documents include GB/T 31155 "Solar Resource Level Total Radiation".

2. Core Terms and Definitions

3. Classification indicators and standard thresholds

The standard uses three core indicators to classify solar direct radiation resources: annual normal direct radiation irradiance ($H_{DN}$), normal direct radiation stability ($R_{wd}$) and direct ratio ($R_{D}$). The specific classification is as follows:

1. Data collection and analysis

In practical applications, it is necessary to combine the long-term observation data of meteorological stations to evaluate the direct solar radiation resources. It is recommended to use a calibrated radiometer (Radiation Meter) to measure direct radiation and diffuse radiation, and calculate the direct radiation ratio.

2. Zoning and resource optimization allocation

Based on the standard classification results, it is recommended to prioritize the layout of solar power stations in Class A and Class B resource areas. At the same time, according to the different levels of stability and direct radiation ratio characteristics, select appropriate photovoltaic modules and tracking systems (Solar Tracking System) to improve power generation efficiency.

3. Analysis of future technological evolution

With the advancement of solar energy technology, it is recommended to further optimize the irradiation calculation model and combine satellite remote sensing data (Satellite Remote Sensing) to achieve larger-scale resource assessment. In addition, explore the improvement space of direct radiation prediction algorithms to improve resource utilization efficiency.