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A comprehensive control method for voltage sags on the grid side

A voltage sag and comprehensive treatment technology, applied in the direction of AC network voltage adjustment, electrical components, circuit devices, etc., can solve problems such as less research on treatment methods, improve system reliability, reduce failure rate, and achieve mutual compatibility Effect

Active Publication Date: 2020-09-25
FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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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.

Method used

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  • A comprehensive control method for voltage sags on the grid side
  • A comprehensive control method for voltage sags on the grid side
  • A comprehensive control method for voltage sags on the grid side

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Embodiment 1

[0052] This embodiment provides a comprehensive control method for voltage sag on the grid side, such as figure 1 , including the following steps:

[0053] S1: Pre-evaluate the voltage sag disturbance level of the whole network;

[0054] S2: Evaluate the economic losses of voltage sags of sensitive users in the entire network, including user voltage sag tolerance and economic losses of users' production interruptions;

[0055] S3: Select an alternative grid-side voltage sag control plan, including optimization and transformation of grid lines and compensation by power electronic compensation equipment;

[0056] S4: Solve the optimal grid-side voltage sag control scheme through an intelligent algorithm, and determine the optimal grid-side voltage sag control scheme.

[0057] Use the fault point method to pre-evaluate the voltage sag disturbance level, as follows:

[0058] Simulate the occurrence of faults in the system, use the short-circuit calculation and related voltage ...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/16H02J3/18G06Q10/04G06Q50/06G06N3/00
CPCG06N3/006G06Q10/04G06Q50/06H02J3/16H02J3/1842Y02E40/30
Inventor 李新武利会范心明欧繁罗容波孙广慧董镝宋安琪王俊波李国伟黎小龙唐琪黄静陈斯翔陈邦发
Owner FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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