Lyapunov stability analysis method of time delay electric system

A technology of power system and analysis method, applied in the field of power system, can solve problems such as low efficiency of time-delay power system stability analysis and calculation
CN103227467AInactive Publication Date: 2013-07-31TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2013-07-31
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of electric systems. In order to solve the problem of low stability analysis computing efficiency of the original time delay electric system, effectively reduce the dimensionality of a time delay differential equation and achieve higher computing efficiency, the invention adopts a technical scheme that a Lyapunov stability analysis method of a time delay electric system comprises the following steps of establishing a constraint time delay differential equation (CTODE) model of the electric system, rearranging and reorganizing system states in a manner that the states (z1 to z) not considering time delay influence are at the front and the states (z2 to z) considering the time delay influence are at the back, obtaining a CTODE model corresponding to the original time delay system, and basing on a new stability criterion of the CTODE model. The method is mainly applied to the electric system.
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Description

technical field

[0001] The invention belongs to the technical field of power systems, and relates to a Lyapunov stability analysis method of a time-delay power system. Background technique

[0002] In nature, the future development trend of the system depends not only on the current state, but also on the past state. This kind of phenomenon is called time lag [1, 2]. Time lag widely exists in all aspects of the power system, but traditional control signals are mainly obtained from local measurement devices, and the time lag is very small, so it is usually not considered. However, in the wide-area environment, the time delay of the remote measurement link is very obvious, so it is of great practical significance to study the influence of the time delay on the stability of the power system [3,4].

[0003] Existing time-delay stability studies on power systems are mostly carried out based on the following time-delay differential equation (TODE) model:

[0004] Δ...

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