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Time delay power system electromechanical oscillation mode computing method based on SOD-PS-R R algorithm

A technology of SOD-PS-R and power system, which is applied in the field of electromechanical oscillation mode calculation of time-delay power system, and can solve problems such as not considering the influence of time-delay

Active Publication Date: 2016-04-06
SHANDONG UNIV
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Problems solved by technology

However, none of the methods mentioned above considered the effect of time lag

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  • Time delay power system electromechanical oscillation mode computing method based on SOD-PS-R R algorithm
  • Time delay power system electromechanical oscillation mode computing method based on SOD-PS-R R algorithm
  • Time delay power system electromechanical oscillation mode computing method based on SOD-PS-R R algorithm

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Embodiment Construction

[0097]The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0098] Such as figure 1 Shown: Introducing communication time-lags during the modeling of real large-scale power systems. The time-delay power system includes four parts: time-delay-free power system, wide-area feedback time-delay, wide-area damping controller and wide-area output time-delay. The connection relationship between each part is shown in the figure. figure 1 In , the output of the time-delay-free power system is y f ,y df is the wide-area feedback signal taking time lag into account and used as the input of the damping controller, y c is the output of the wide-area damping controller, y dc It is the control input of the time-delay-free power system.

[0099] Such as figure 2 Shown: The operating modes corresponding to the eigenvalues ​​of the time-delay power system can be mainly divided into three categories, electromechanical oscilla...

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Abstract

The invention discloses a time delay power system electromechanical oscillation mode computing method based on the SOD-PS-R (Solution Operator Discretization-Pesudo Spectrum and Rotation) algorithm. According to the relation between an eigenvalue of a time delay power system model and an operator eigenvalue of the time delay power system model, computing the eigenvalue of the time delay power system model is converted into computing the operator eigenvalue, so that a problem about computing an electromechanical oscillation mode of a time delay power system is converted into a problem about computing the operator eigenvalue; the method is used for the electromechanical oscillation mode of a large-scale time delay power system. The SOD-PS-R requires computing the maximal setting number eigenvalue of an operator discretization approximate matrix norm only, therefore one computing is enough for obtaining the electromechanical oscillation mode of the large-scale time delay power system.

Description

technical field [0001] The invention relates to an electromechanical oscillation mode calculation method of a time-delay power system based on the SOD-PS-R (Solution Operator Discretization-Pesudo Spectrum and Rotation) algorithm. 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 based on the wide-area inform...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 叶华牟倩颖刘玉田
Owner SHANDONG UNIV
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