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Method and system for recognizing typical oscillation mode of power grid

A technology of oscillation mode and identification method, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as lack of typical oscillation mode identification

Active Publication Date: 2021-07-16
JIANGSU ELECTRIC POWER CO +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Dispatch operators focus on the mode frequencies, damping ratios, and strongly correlated units (collectively referred to as oscillation information) of typical oscillation modes such as interregional oscillation modes and other weakly damped oscillation modes, while conventional small-disturbance stability analysis only gives all the small-disturbance stability of the system Pattern information, lacking typical oscillatory pattern recognition

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  • Method and system for recognizing typical oscillation mode of power grid

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0029] Such as figure 1 As shown, a method for identifying a typical oscillation mode of a power grid includes the following steps:

[0030] Step 1. Obtain the current operating mode data of the power system, and use the eigenvalues ​​of the current operating mode data to calculate the small-disturbance stable mode of the power system;

[0031] Step 2, matching all small-disturbance stable modes with typical oscillation modes to obtain the most suitable small-disturbance stable mode for each typical oscillation mode;

[0032] Step 3, take the damping ratio, mode frequency, participation factor and mode of the small disturbance stable mode as the damping ratio, mode frequency, participation fac...

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Abstract

The invention discloses a power grid typical oscillation mode recognition method and system. The method comprises the steps: enabling all small-interference stable modes of a power system to be matched with typical oscillation modes, and enabling the most adaptive small-interference stable mode to serve as a corresponding typical oscillation mode; and a technical support can be provided for scheduling operation personnel to master typical small-interference stability characteristics of the power grid.

Description

technical field [0001] The invention relates to a method and system for identifying a typical oscillation mode of a power grid, belonging to the technical field of power system automation. Background technique [0002] The interconnection of large-capacity and long-distance multi-regional power grids has made the problem of low-frequency oscillation increasingly prominent, posing a great threat to the stable operation of the system. The inter-regional low-frequency oscillation mode has become a key factor affecting system stability. Dispatch operators focus on the mode frequencies, damping ratios, and strongly correlated units (collectively referred to as oscillation information) of typical oscillation modes such as interregional oscillation modes and other weakly damped oscillation modes, while conventional small-disturbance stability analysis only gives all the small-disturbance stability of the system Pattern information, lacking typical oscillatory pattern recognition. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20H02J3/00G06F113/04
CPCG06F30/20H02J3/00G06F2113/04H02J2203/20Y02E60/00
Inventor 苏大威夏小琴徐春雷任先成张琦兵徐伟王黎明陈颖杰杨君军李乃双罗峰
Owner JIANGSU ELECTRIC POWER CO