Abstract
Firstly, this paper analyzes the mechanism between reactive power and transient voltage of line commutated converter HVDC (LCC-HVDC) receiving-end power grid, and the physical process in three periods is sorted out according to the time scale. The interaction between dynamic load and LCC-HVDC during AC system fault is studied. Based on this, the necessity of dynamic reactive power compensation is proposed. The simulation analysis shows that the dynamic reactive power compensation can effectively improve the transient voltage stability during fault, and can effectively prevent the diffusion of dynamic load transient instability in the heavy load area, and the compensation effect of connected to the low-voltage bus is better than that to the high-voltage bus. The research results of this paper have a significant effect on improving the transient voltage characteristics of LCC-HVDC receiving-end power grid with high proportion of dynamic load, and can guide the actual operation of the project.
Published Version
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