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Method and system for determining transient voltage stability of high-proportion new energy power system

A transient voltage and power system technology, applied in the direction of AC network voltage adjustment, electrical components, circuit devices, etc., to achieve the effect of improving the safety level of the power grid and voltage regulation ability, improving accuracy, and ensuring safe and stable operation

Active Publication Date: 2022-01-18
CHINA ELECTRIC POWER RES INST
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Problems solved by technology

[0009] The present invention proposes a method and system for determining the transient voltage stability of a high-proportion new energy power system to solve the problem of how to efficiently determine the transient voltage stability of a high-proportion new energy power system

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  • Method and system for determining transient voltage stability of high-proportion new energy power system

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[0048] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0049] Unless otherwise stated, the terms (including scientific and technical terms) used herein have the meanings commonly understood by those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or overly ...

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Abstract

The invention relates to a method and a system for determining transient voltage stability of a high-proportion new energy power system. The method comprises the following steps: acquiring transient voltage disturbed recovery data of each node in the high-proportion new energy power system after preset fault disturbance; performing discrete wavelet analysis on the transient voltage disturbed recovery data, and determining a wavelet decomposition coefficient of each layer corresponding to each node; determining a comparison threshold value corresponding to each layer; determining the node type of each node according to the wavelet decomposition coefficient of each layer corresponding to each node and the comparison threshold value corresponding to each layer; and when the nodes of which the node types are preset types exist, determining that the transient voltage stability of the high-proportion new energy power system is transient voltage instability. The method can be applied to a dispatching control center, provides decision support for power grid dispatching operation personnel to improve the power grid safety level and the voltage regulation capability and promote new energy consumption, and better guarantees safe and stable operation of a high-proportion new energy power system.

Description

technical field [0001] The present invention relates to the technical field of online security assessment and analysis of power systems, and more specifically, to a method and system for determining the transient voltage stability of a high-proportion new energy power system. Background technique [0002] With the further rapid development of new energy sources such as wind power and photovoltaics, the power grid structure will undergo fundamental and major changes, and the safe operation of the power grid will face new challenges. On the one hand, under the background of the continuous high proportion of new energy access and profound changes in the consumption mode, the voltage characteristics of the power grid have undergone fundamental changes, the coupling of AC and DC, and the sending and receiving ends of the power grid has become increasingly tight, and the impact of faults on the operation of the power grid has changed from local to global , the characteristics of p...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/12H02J3/38
CPCH02J3/12H02J3/381H02J2203/10H02J2203/20H02J2300/20
Inventor 魏亚威吕颖张璐路王兵贾海波马晶苗春帅蔡顺友鲁广明严剑峰李亚楼田芳于之虹李伟史东宇戴红阳石琛解梅宋元明
Owner CHINA ELECTRIC POWER RES INST
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