Analysis on solar energy resources distribution of four provinces in northwestern China and long-term variation

doi:10.3969/j.issn.2097-0706.2024.02.010

Abstract

Abstract:

According to the meteorological data of four provinces in northwestern China from 1978 to 2017, the spatial distribution characteristics of the total solar radiation in this region are analyzed. Based on the solar energy resources zoning map, the long-term variation trend of the total solar radiation in this region that has not been studied is analyzed.And the results show that the average annual radiation of recent years varies from 3 676 to 7 036 MJ/m². The irradiance gradually decreases from northwest to southeast，and the high-value areas mainly locate in most portions of Qinghai, western Hexi Region of Gansu，most portions of Ningxia and northern Shaanxi.The seasonal solar radiation peaks in summer and bottoms out in winter. In long term, the total solar radiation of the four provinces shows a decreasing trend, and that of the central and western Qinghai is of the highest descent rate, while that of western Hexi Region and some parts of northern Shaanxi shows prominent increases. The variation trend of total solar radiation varies in four seasons, the value shows the most prominent decrease tendency in autumn while shows increase tendency in spring. The understanding on long-term variation tendency of solar energy resources provides references for the long-term profiting and risk prevention of photovoltaic power plants.

Key words: photovoltaic, solar energy, total solar radiation, long-term variation tendency, resources zoning

CLC Number:

TK51

LI Chunhua, ZHU Biao. Analysis on solar energy resources distribution of four provinces in northwestern China and long-term variation[J]. Integrated Intelligent Energy, 2024, 46(2): 75-81.

Figures/Tables 7

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