Phase modifier site selection method and device based on voltage sensitivity index

Abstract

The invention provides a phase modifier site selection method and device based on a voltage sensitivity index, and the method comprises the steps: selecting any bus, adding the reactive power of a preset value, determining the voltage change process of all buses, and calculating the voltage sensitivity index; repeating the processes of selecting any bus, adding the reactive power with the preset value and calculating the voltage sensitivity index until all buses are traversed; and selecting the bus with the maximum voltage sensitivity index as a site selection result of the phase modifier. According to the method, the maximization of the voltage sensitivity index is used as a site selection reference index of the synchronous phase modifier, so that the site selection has excellent reactive voltage support capability, the bus position most suitable for the newly-built phase modifier can be found, and an optimized strategy scheme is provided for reactive voltage support of the system. Meanwhile, in combination with electromagnetic transient simulation, rapid and accurate voltage sensitivity index calculation can be realized, and the site selection efficiency of the phase modifier is improved.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a voltage sensitivity index-based method and device for addressing a condenser. Background technique [0002] The problem of voltage instability after N-1 and N-2 faults may occur in large-scale power grids during operation. One solution is to use synchronous condensers to provide reactive power support for key nodes. The synchronous condenser is essentially a synchronous motor running in a special working state. The main function of the synchronous condenser is to automatically output inductive reactive power to the grid when the grid voltage drops according to the change of the power system state. When rising, absorb the inductive reactive power of the grid to maintain the balance of the reactive power of the grid, ensure the stability of the grid voltage, improve the stability of the power system, and improve the voltage quality of the grid. As one of the commonly used reactive p...

AI Technical Summary

Problems solved by technology

However, not all sites can effectively solve the problem of grid voltage instability, and the reactive power and voltage support capabilities of each site are different.

At present, there is still a lack of research on the site selection of new synchronous condensers. Accurate site selection of synchronous condensers to improve the effect of synchronous condensers has become an urgent problem to be solved

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