Hydropower primary frequency modulation stability discrimination method, system and device, and medium

A discrimination method and stability technology, applied in character and pattern recognition, data processing applications, instruments, etc., can solve problems such as inaccurate discrimination of hydropower system stability, and achieve accurate and accurate discrimination results

Pending Publication Date: 2022-07-15
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of inaccurate judgment of the stability of the hydropower system in the prior art, the present invention proposes a method for judging the stability of the primary frequency modulation of hydropower, including:

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  • Hydropower primary frequency modulation stability discrimination method, system and device, and medium
  • Hydropower primary frequency modulation stability discrimination method, system and device, and medium
  • Hydropower primary frequency modulation stability discrimination method, system and device, and medium

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Embodiment 1

[0055] The invention provides a method for judging the stability of primary frequency modulation of hydropower, and the realization process is as follows: figure 1 shown, including:

[0056] Step 1: Input the acquired parameters of the hydropower system into a pre-built open-loop transfer function to obtain a Nyssl curve;

[0057] Step 2, obtaining a negative inverse description function curve based on the set gap dead zone width and the pre-built description function of the gap dead zone;

[0058] Step 3: Determine the stability of the nonlinear system based on the relative positions of the negative inverse description function curve and the Nyssl curve.

[0059] The following describes a method for judging the stability of primary frequency modulation of a hydropower system according to the present invention, combined with figure 2 for a detailed introduction.

[0060] In step 1, the acquired parameters of the hydropower system are input into the pre-built open-loop tran...

Embodiment 2

[0114] The invention provides a method for judging the stability of primary frequency regulation of hydropower combined with the analysis of four sets of governor parameters. The specific implementation process includes:

[0115] Step 1: Input the acquired parameters of the hydropower system into a pre-built open-loop transfer function to obtain a Nyssl curve;

[0116] Step 2, obtaining a negative inverse description function curve based on the set gap dead zone width and the pre-built description function of the gap dead zone;

[0117] Step 3: Determine the stability of the nonlinear system based on the relative positions of the negative inverse description function curve and the Nyssl curve.

[0118] In step 1, the acquired parameters of the hydropower system are input into the pre-built open-loop transfer function to obtain the Nyssl curve, which is specifically used for:

[0119] Establish the model of each subsystem of the hydropower system, and write the transfer functi...

Embodiment 3

[0171] The invention provides a system for judging the stability of primary frequency regulation of hydropower, comprising:

[0172] The Nyssl curve module is used to input the acquired parameters of the hydropower system into the pre-built open-loop transfer function to obtain the Nyssl curve;

[0173] The negative inverse description function curve module is used to obtain the negative inverse description function curve based on the set gap dead zone width and the pre-built description function of the gap dead zone;

[0174] A discriminating module, configured to discriminate the stability of the nonlinear system based on the relative positions of the negative inverse description function curve and the Nyssl curve.

[0175] The discriminant module, including:

[0176] a projection submodule for projecting the negative inverse description function curve and the Nyssler curve on the same complex plane;

[0177] a stabilization sub-module, used for when the negative inverse d...

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Abstract

The invention discloses a hydropower primary frequency modulation stability judgment method, system and device and a medium. The method comprises the steps that obtained hydropower system parameters are input into a pre-constructed open-loop transfer function to obtain a Neyelash curve; obtaining a negative inverse description function curve based on the set width of the gap dead zone and a pre-constructed description function of the gap dead zone; and judging the stability of the nonlinear system based on the relative position of the negative inverse description function curve and the Nessler curve. According to the method, the approximate equivalent frequency characteristics of the gap dead zone are represented by adopting a description function method, the stability of a nonlinear system influenced by the gap dead zone can be analyzed, and the influence of nonlinear factors of the gap dead zone is considered, so that the judgment result is more accurate and better fits the actual condition of a hydroelectric system.

Description

technical field [0001] The invention relates to the fields of hydropower generation engineering and power system stability, in particular to a method, system, equipment and medium for judging the stability of primary frequency regulation of hydropower. Background technique [0002] At present, intermittent renewable energy represented by wind energy and solar energy is developing rapidly in the world. As the backbone power source for peak regulation and frequency regulation in the power system, hydropower is more flexible and reliable to undertake system peak regulation, frequency regulation, valley filling, phase regulation and emergency backup. It occupies an indispensable position in a reasonable energy structure and is the key to ensuring the security and stability of a high-proportion renewable energy power system; at the same time, with the vigorous development of hydropower, hydropower accounts for a large proportion of the energy structure. However, the time-varying,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62G06F17/15G06Q50/06
CPCG06F17/15G06Q50/06G06F18/241
Inventor 姬联涛荆岫岩杨威嘉刘昊王璞陈龙翔黄坤郝峰庄俊江秋荣廖溢文
Owner CHINA ELECTRIC POWER RES INST
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