Large power grid quiescent voltage stability situation evaluation method and system based on linear deduction

A technology for static voltage stability and situation assessment, which is applied to the integration of power network operating systems, AC network voltage adjustment, and information technology support systems. and other problems to achieve the effect of overcoming the large amount of calculation

Active Publication Date: 2020-09-11
SHANDONG UNIV +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the complex index system itself and the many factors affecting the trend change, the overall calculation of all indicators is very large, which cannot meet the speed requirements of real-time security assessment and situation analysis of the power grid. In addition, considering that the comprehensive

Method used

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  • Large power grid quiescent voltage stability situation evaluation method and system based on linear deduction
  • Large power grid quiescent voltage stability situation evaluation method and system based on linear deduction
  • Large power grid quiescent voltage stability situation evaluation method and system based on linear deduction

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Embodiment 2

[0084] This embodiment provides a large power grid static voltage stability situation assessment system based on linear deduction, including:

[0085] Linear deduction module: configured to obtain the estimated stability margin index and voltage amplitude under the power flow section by linear deduction calculation on a second-level time scale according to the operation information of the current power flow section;

[0086] Judgment module: configured to construct a voltage stability situation evaluation index reflecting the development trend of power grid operation based on the stability margin difference between adjacent sections, and judge the development trend of the system operation through the size of the voltage stability situation evaluation index.

Embodiment 3

[0088] This embodiment provides an electronic device, including a memory, a processor, and computer instructions stored in the memory and executed on the processor. When the computer instructions are executed by the processor, the steps described in the method in Embodiment 1 are completed.

Embodiment 4

[0090] This embodiment provides a computer-readable storage medium for storing computer instructions, and when the computer instructions are executed by a processor, the steps described in the method in Embodiment 1 are completed.

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Abstract

The invention provides a large power grid quiescent voltage stability situation evaluation method and system based on linear deduction. The method comprises the following steps: obtaining a stabilitymargin index and a voltage amplitude under an estimated tide section by utilizing linear deduction calculation under a second-level time scale; and constructing a voltage stability situation evaluation index reflecting the power grid operation development trend based on the stability margin difference between the adjacent sections, and judging the system operation development trend according to the size of the voltage stability evaluation index. According to the method, the stability margin index of the estimated section can be accurately and quickly estimated by adopting a linear deduction method; the method is advantaged in that a defect of large calculation amount caused by Jacobian matrix inversion operation of a traditional method is overcome, real-time demands of subsequent prevention and control optimization decisions are adapted, the voltage stability situation evaluation index is constructed, and the operation development trend of the electric power system can be directly determined through the index.

Description

technical field [0001] The present disclosure relates to the technical field related to power system operation control, and specifically relates to a method and system for assessing static voltage stability situation of a large power grid based on linear derivation. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] One of the important functions of the smart grid is to improve the situational awareness, visualization and early warning capabilities of the grid in order to achieve the purpose of intelligent monitoring. Among them, situational awareness or assessment refers to the perception and understanding of each element or object in the environment and the prediction of the future state at a specific time and space, which can include three stages: situational element collection, real-time situational understanding, and future situational...

Claims

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Application Information

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IPC IPC(8): H02J3/14
CPCH02J3/144H02J2203/10H02J2203/20Y02B70/3225Y04S20/222
Inventor 贠志皓崔馨慧张晓华冯长有李铁张艳军崔岱段方维姜枫王钟辉
Owner SHANDONG UNIV
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