Delayed power system stability analysis method based on low-order EIGD (Explicitly Infinitesimal Generator Discretization)

A technology of power system and analysis method, which is applied in the field of time-delay power system stability analysis based on the discretization of low-order explicit infinitesimal generators, and can solve problems such as reducing the dimension of the spectrum discretization matrix
CN108647906AActive Publication Date: 2018-10-12SHANDONG UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG UNIV
Publication Date
2018-10-12

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Abstract

The invention discloses a delayed power system stability analysis method based on low-order EIGD (Explicitly Infinitesimal Generator Discretization). The method comprises the steps of establishing a delayed power system model for a power system, and linearizing the delayed power system model, that is, expressing the delayed power system model through a delayed differential equation; re-ranking state variables of the delayed power system in the delayed differential equation, and dividing the state variables into delay-independent state variables and delay-dependent state variables; transformingthe delayed differential equation into an ordinary differential equation by use of an infinitesimal generator, thereby equivalently transforming a characteristic equation of the delayed power systeminto an ordinary characteristic equation, and further transforming calculation for characteristic values of the delayed power system into calculation for characteristic values of the infinitesimal generator. According to the delayed power system stability analysis method based on the low-order EIGD, through re-ranking of the state variable of the system, discretization of the delay-independent state variables is removed, the number of dimensions of a discretization matrix is reduced, and therefore, the calculated amount for calculation of key characteristic values of a DCPPS (Delayed Cyber-Physical Power System) is reduced.
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Description

technical field

[0001] The invention relates to the technical field of power system stability analysis, in particular to a time-delay power system stability analysis method based on low-order explicit infinitesimal generator discretization (Explicitly Infinitesimal Generator Discretization, EIGD). Background technique

[0002] The operation and control of modern power systems depend on a reliable information system all the time. The power information system based on computer technology, communication technology and sensor technology is closely and organically combined with the power primary system. The power system is essentially a cyber-physical power system, that is, CPPS (Cyber-Physical Power System). The emergence of Wide-Area Measurement System (WAMS) has brought new opportunities for the development of large-scale interconnected power system stability analysis and control. Its advanced applications include: power system dynamic monitoring and state estimation, paramet...

Claims

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