Minimum start-up optimization method of weak receiving terminal power grid for enabling large-capacity DC feed-in

A technology of DC feeding and optimization method, applied in the direction of AC network circuits, electrical components, circuit devices, etc., can solve the problems of time-consuming and labor-intensive, lack of quantitative indicators and reasonable strategies, etc.

Active Publication Date: 2018-03-09
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Repeated adjustments and calculations are time-consuming and labor-intensive, and there is a lack of quantitative indicators and reasonable strategies to guide the power grid at the weak receiving end to adjust the start-up mode

Method used

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  • Minimum start-up optimization method of weak receiving terminal power grid for enabling large-capacity DC feed-in
  • Minimum start-up optimization method of weak receiving terminal power grid for enabling large-capacity DC feed-in
  • Minimum start-up optimization method of weak receiving terminal power grid for enabling large-capacity DC feed-in

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Embodiment Construction

[0040] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concept of the present disclosure.

[0041] The terms used here are only for describing specific embodiments, and are not intended to limit the present disclosure. The terms "including", "including", etc. used herein indicate the existence of the described features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0042] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be not...

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Abstract

The invention discloses a start-up method of a receiving terminal power grid for enabling the DC feed-in. The method comprises the steps of screening out priority on-off lines according to a grid structure and a power flow result of a receiving terminal power grid; turning on and off the priority on-off lines one by one and calculating the vulnerability indexes of each priority on-off line; according to the vulnerability indexes, constructing an on-off line fault set; calculating the temporary drop index of a bus voltage during each on-off line fault in the on-off line fault set; according tothe temporary drop index of the bus voltage, constructing a voltage weak bus node set; representing the electrical distance between each unit and each bus node in the voltage weak bus node set throughthe mutual impedance of the node; ranking the voltage supporting capacities of all units according to the electrical distance; and checking the ranking result of the voltage supporting capacities.

Description

Technical field [0001] The invention relates to a method for optimizing the minimum start-up of a weak receiving end power grid supporting large-capacity direct current feeding. Background technique [0002] The arrangement of the daily startup mode of the power grid needs to consider various security constraints such as thermal stability, power angle stability, voltage stability, small interference stability, frequency modulation requirements, and spinning reserve arrangements. At the same time, it is more complicated to consider economic constraints such as economic operation and power trading. In the case of "strong direct and weak alternating current", the voltage stability constraint of the receiving end power grid often becomes a restrictive constraint, and the power-on mode is the key influencing factor of voltage stability constraint. Relying on the existing simulation calculation and analysis work mode to optimize the startup mode, generally first arrange the startup com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 唐晓骏吕勃翰马世英谢岩李晓珺申旭辉张鑫霍启迪张志强罗红梅李晶李海峰罗凯明金涛周俊梁海平李少岩宋云亭郑超陈湘吴丽华李媛媛李再华
Owner CHINA ELECTRIC POWER RES INST
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