Electric power system equivalent inertia constant identification method and related device thereof

A power system equivalent and inertial constant technology, which is applied in the direction of circuit devices, measuring devices, system integration technology, etc., can solve the problem that the real-time online identification of the equivalent inertial constant of the power system cannot be realized, and achieves the improvement of real-time online identification and calculation efficiency High, realize the effect of real-time online identification

Pending Publication Date: 2022-01-11
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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Problems solved by technology

[0003] This application provides a power system equivalent inertia constant identification method and related devices, which are used to improve the technical problem that the existing technology cannot realize real-time online identification of power system equivalent inertia constants

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  • Electric power system equivalent inertia constant identification method and related device thereof
  • Electric power system equivalent inertia constant identification method and related device thereof
  • Electric power system equivalent inertia constant identification method and related device thereof

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Embodiment Construction

[0053] The present application provides a power system equivalent inertia constant identification method and related devices, which are used to improve the technical problem that the prior art cannot realize real-time online identification of power system equivalent inertia constants.

[0054]In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0055] For ease of understanding, see figure 1 , the embodiment of the present ...

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Abstract

The invention discloses an electric power system equivalent inertia constant identification method and a related device thereof. The method comprises the following steps: acquiring active power and connection bus frequency of each synchronous machine in an electric power system through a synchronous phasor measurement unit; taking the sum of all the active powers as a first input signal, taking the weighted average value of all the connection bus frequencies as a first output signal, and preprocessing the first input signal and the first output signal; constructing an autoregressive moving average model through the preprocessed first input signal and the preprocessed first output signal, and performing parameter identification on the autoregressive moving average model through a recursive weighted least square method to obtain an identification model; and extracting the electric power system equivalent inertia constants through the identification model, so the technical problem that real-time online identification of the electric power system equivalent inertia constants cannot be achieved in the prior art is solved.

Description

technical field [0001] The present application relates to the technical field of electric power systems, in particular to a method for identifying equivalent inertia constants of electric power systems and related devices. Background technique [0002] Inertia is an inherent property of the power system, and it is the basis for ensuring the safe and stable operation of the system. The inertia of a power system usually comes from the rotational kinetic energy stored by the synchronous machine in the system, and can be characterized by an equivalent inertia constant. Therefore, it is of great significance to realize the real-time online identification of the equivalent inertia constant of the power system to ensure the safe and stable operation of the system. According to the type of sampling signal, the identification method of equivalent inertia constant of power system can be divided into identification based on transient response signal and identification based on noise-l...

Claims

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Application Information

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IPC IPC(8): H02J3/00G01R31/00
CPCH02J3/00G01R31/00H02J2203/20Y02E40/70Y02E60/00Y04S10/22
Inventor 曾繁宏李昊飞
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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