Time-lag electric power system stability discrimination method based on IGD-IRK (infinitesimal generator discretization method with implicit Runge-Kutta)

Abstract

The invention discloses a time-lag electric power system stability discrimination method based on IGD-IRK (infinitesimal generator discretization method with implicit Runge-Kutta). The method includesthe steps: building a time-lag electric power system model; discretizing an infinitesimal generator by an implicit Runge-Kutta method to obtain a discretized matrix of the infinitesimal generator; transforming an infinite dimensional characteristic value problem into a finite dimensional characteristic value problem; calculating approximate values of maximum characteristic values of module valuesof the obtained discretized matrix of the infinitesimal generator by an implicit Arnoldi algorithm; performing sparse implementation by the aid of properties of Kronecker products, and iteratively solving matrix inversion and vector product problems by an induction dimension-decreasing algorithm; transforming the approximate values of the maximum characteristic values of the module values of thediscretized matrix of the infinitesimal generator into approximate characteristic values of a time-lag electric power system model; correcting the approximate characteristic values by a Newton iteration method to obtain accurate characteristic values; judging stability of a time-lag electric power system according to the accurate characteristic values.

Description

technical field

[0001] The invention relates to a time-delay power system stability discrimination method based on the Runge-Kutta discretization (Infinitesimal Generator Discretization Method with Implicit Runge-Kutta, IGD-IRK) of infinitesimal generators. Background technique

[0002] With the rise of the Global Energy Internet, the scale of the interconnected power system is gradually increasing, and the problem of interval low-frequency oscillation is more significant. The traditional solution is to install a power system stabilizer (Power System Stabilizer, PSS), but because its feedback control signal comes from the local area, it cannot effectively damp the interval oscillation of the interconnected power system.

[0003] The emergence of Wide-Area Measurement System (WAMS) has brought new opportunities for the development of stability analysis and control of large-scale interconnected power systems. The low-frequency oscillation control of the interconnected grid ba...

Examples

Embodiment Construction

[0196] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0197] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0198] Such as figure 1 As shown, the time-delay power system stability discrimination method based on IGD-IRK ...

technical field

[0001] The invention relates to a time-delay power system stability discrimination method based on the Runge-Kutta discretization (Infinitesimal Generator Discretization Method with Implicit Runge-Kutta, IGD-IRK) of infinitesimal generators. Background technique

[0002] With the rise of the Global Energy Internet, the scale of the interconnected power system is gradually increasing, and the problem of interval low-frequency oscillation is more significant. The traditional solution is to install a power system stabilizer (Power System Stabilizer, PSS), but because its feedback control signal comes from the local area, it cannot effectively damp the interval oscillation of the interconnected power system.

[0003] The emergence of Wide-Area Measurement System (WAMS) has brought new opportunities for the development of stability analysis and control of large-scale interconnected power systems. The low-frequency oscillation control of the interconnected grid ba...

Examples

Embodiment Construction

[0196] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0197] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0198] Such as figure 1 As shown, the time-delay power system stability discrimination method based on IGD-IRK ...

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