Method and system for adjusting difference adjustment coefficient of direct current-containing power grid generator

Abstract

The invention discloses a method and a system for adjusting difference adjustment coefficient of a direct current-containing power grid generator, and belongs to the technical field of electric powersystem operation control. The method comprises the following steps: constructing a target function in the adjusting process of the difference adjustment coefficient, that is, the voltage standard difference index of central nodes under multiple periods in a regional power grid is minimal; constructing the constraint conditions in the adjusting process of the difference adjustment coefficient, wherein the constraint conditions comprise trend constraint, control variable constraint and security constraint, and the trend constrain equation contains an electric generator node, an alternating current PQ node and a direct current PQ node; and solving the target function by a particle swarm algorithm, and finding a group of difference adjustment coefficient which enables the target function to obtain the minimum value when the constraint conditions are met, namely an electric generator difference adjustment coefficient adjusting value. By the method and the system, the difference adjustment coefficient of the electric generator in the regional power grid can be optimized rapidly and efficiently and the voltage level of the power grid is improved.

Description

technical field [0001] The invention relates to the technical field of electric power system operation control, in particular to a method for setting the adjustment coefficient of a power grid generator including direct current. Background technique [0002] The adjustment coefficient of the generator excitation system affects the safe and economical operation of the power grid. If the adjustment coefficient is too large, when the generator tracks the reactive power changes of the load, the operating voltage of the power grid will fluctuate greatly, which will affect the voltage quality and increase the loss and loss of the power grid network. Operation risk; if the difference adjustment coefficient is too small, when the operating voltage of the grid changes slightly, the generator will output more reactive power, and at the same time, the generator sets running in parallel will have a reactive power grabbing phenomenon, which is not conducive to the safe operation of the ge...

AI Technical Summary

Problems solved by technology

However, because the power plant does not know enough about the excitation adjustment coefficient and there is no definite standard to guide the power plant to set the excitation adjustment coefficient, the setting of the excitation adjustment coefficient in some power plants is unreasonable, which may easily cause uneven reactive power distribution among generator sets, and even cause The phenomenon of scrambling for reactive power between units, for units near the UHV DC drop point, if the adjustment coefficient is not set properly, the reactive power adjustment speed will not be able to keep up with the failure state, which is not conducive to the stability of the grid voltage

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