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This paper analyzes the influence of the temporal and spatial correlation of meteorological factors on the power flow characteristics of the power grid based on the electro-thermal coupled power flow model of the unified iterative format. First, based on the IEEE 738-Standard heat balance equation, this paper establishes an electric-thermal coupling unified power flow calculation model considering meteorological factors, which incorporates the temperature and resistance of the transmission line into the power flow state variables and introduces environmental parameters into the power flow calculation. Then, by individually changing the wind speed, altitude and ambient temperature, quantitatively analyze the change trend and degree of influence on bus voltage amplitude, bus voltage phase angle, line temperature, line resistance, line active and reactive power loss. Finally, the meteorological data of area A and area B are used to calculate and analyze the range of line resistance, line temperature, line active and reactive power loss of each line of the regional power grid, and compare the transmission power limit of the line in different areas and different seasons. The case study shows that the temporal and spatial changes of area weather have a significant impact on the distribution of power flow, line active and reactive power losses, and power transmission limits by changing line resistance and temperature. Considering the temporal and spatial correlation of meteorological factors is of great significance to the safe and stable economic operation of the power grid.
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Jia et al. (2021) studied this question.