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A receiving-end power grid stability assessment method

A receiving-end power grid, stability technology, applied in the field of power system, can solve problems such as dynamic stability that cannot be taken into account

Active Publication Date: 2022-01-18
CHINA ELECTRIC POWER RES INST +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the static and transient stability analysis, the slow dynamic element model that affects the medium and long-term stability of the power grid is generally not considered, so that the calculation results of the stability margin cannot take into account the dynamic stability of the whole process

Method used

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  • A receiving-end power grid stability assessment method
  • A receiving-end power grid stability assessment method
  • A receiving-end power grid stability assessment method

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Embodiment Construction

[0041] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0042] The invention provides a receiving-end grid stability evaluation method that takes into account the dynamic stability of the whole process, adopts the whole-process dynamic simulation software to establish a stability analysis model of the receiving-end grid, and takes into account generator overexcitation limitation and transformer on-load voltage regulation, etc. The dynamic characteristics of slow-moving components, using the load growth rate to balance the dynamic reactive power consumption of each power supply zone in the process of continuous load growth, that is, using the load growth method that consumes the dynamic reactive power reserve of the entire network to calculate the load growth of each power supply zone The active load margin is used as an evaluation index for the stability of the power grid at the receiving end.

[0043] Taking Beij...

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Abstract

The invention provides a receiving-end grid stability evaluation method that takes into account the dynamic stability of the whole process, adopts the whole-process dynamic simulation software to establish a stability analysis model of the receiving-end grid, and takes into account generator overexcitation limitation and transformer on-load voltage regulation, etc. The dynamic characteristics of slow-moving components, using the load growth rate to balance the dynamic reactive power consumption of each power supply zone in the process of continuous load growth, that is, using the load growth method that consumes the dynamic reactive power reserve of the entire network to calculate the load growth of each power supply zone The active load margin, as an evaluation index for the stability of the power grid at the receiving end, provides an intuitive and effective emergency control criterion for the stable operation of the power grid.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a method for evaluating the stability of a receiving-end power grid considering the dynamic stability of the whole process. Background technique [0002] Commonly used stability indicators can be divided into state indicators and margin indicators. Both types of indicators can give a certain measure of the distance between the current operating point of the system and the stable collapse point. The state index only uses the information of the current running state, and the calculation is relatively simple, but there is nonlinearity. The calculation of the margin index involves the simulation of the transition process and the calculation of the critical point, which contains a large amount of information. [0003] The margin index is defined as: starting from a given operating state of the system, according to a certain mode, gradually approaching the voltage collapse poin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q50/06H02J3/00
CPCH02J3/00G06Q10/0639G06Q50/06H02J2203/20
Inventor 李晶叶大革吕思卓叶琳唐晓骏杨滢申旭辉张静宋云亭杨靖萍罗红梅赵一琰马世英黄弘扬
Owner CHINA ELECTRIC POWER RES INST