A comprehensive control method for voltage sags on the grid side

Abstract

The invention discloses a voltage sag comprehensive treatment method for a power grid side. The voltage sag comprehensive treatment method comprises the steps: S1, pre-evaluating a whole-grid sag disturbance level; S2, evaluating voltage sag economic loss of sensitive users in the whole network, wherein the economic loss comprises user voltage sag endurance capability and user production interruption economic loss; S3, selecting an alternative power grid side voltage sag treatment scheme, wherein the alternative power grid side voltage sag treatment scheme comprises power grid line optimization transformation and power electronic compensation equipment compensation; and S4, solving the optimal power grid side voltage sag treatment scheme through an intelligent algorithm, and determining the optimal power grid side voltage sag treatment scheme. According to the invention, the voltage sag problem is treated from the power grid side, the problem of increasing economic loss of sensitive user voltage sag in a power grid is solved, the voltage sag treatment cost of sensitive users in the whole power grid is reduced, the fault occurrence rate of the system is reduced, the reliability of the system is improved, and the compatibility between the reliability problem and the sag treatment problem is realized.

Description

technical field [0001] The present invention relates to the field of power grid management, and more specifically, to a method for comprehensively controlling voltage sags on the power grid side. Background technique [0002] Power quality is produced along with the production of electric energy, and has received extensive attention from all walks of life with the continuous development of modern society. Voltage sags are the most serious power quality problems, caused by short circuits, overloads, and large motor starts, among others. The essence of voltage sag is an inevitable phenomenon that the effective value of voltage decreases in a short time due to the short-term high current in the power system. Voltage sags pose economic and safety hazards to an increasing number of sensitive users of power systems every year. Both the power supply and the consumer have an urgent need for voltage sag control. [0003] Industrial parks with industrial agglomeration are important...

AI Technical Summary

Problems solved by technology

[0007] Due to the consideration of the influence of the reliability of the power system, the existing research on the control method of voltage sag has less research on the control method of reducing the voltage sag at the source by reducing the short-circuit fault.

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