Abstract: Based on the observational data from 5 global solar radiation stations and 32 weather stations in Heilongjiang province from 1961 to 2010, the characteristics of the spatial-temporal distributions of solar energy resource were analyzed. The abundance and stability of solar energy resource were assessed. The results indicate that the average annual global solar radiation decreases, especially in January and December. The global solar radiation is the strongest in 1970s and weakest in 1980s. The distributions of the global solar radiation and sunshine duration are consistent, and both are more abundant in the west than in the east. The stability of solar energy resource is good in Heilongjiang province, especially in the west of the Songnen plain. It is suitable to build the solar energy power station because of the abundant and stable solar energy resource in the west of the Songnen plain.

Key words: Solar energy resource, Solar global radiation, Sunshine duration