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Scene-divided Norton equivalent harmonic source model identification method considering distributed new energy

A distributed new energy, model identification technology, applied in the field of power system, can solve problems such as large errors, models that cannot reflect harmonic characteristics, and no time synchronization.

Pending Publication Date: 2021-11-09
FUZHOU POWER SUPPLY COMPANY OF STATE GRID FUJIAN ELECTRIC POWER +1
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Problems solved by technology

[0004] At present, the data types used for harmonic modeling are basically accurate values, but in order to reduce the pressure of data storage, harmonic monitoring data are usually statistics, and the statistics of harmonic current and harmonic voltage are in the same monitoring period There is no synchronicity in time, so no direct physical connection can be established by using deterministic values
In addition, in the context of the high penetration rate of distributed energy, current research rarely considers the changes in harmonic characteristics caused by uncertain behaviors such as meteorological conditions, changes in system operating status, and user load behavior. As a result, the established model cannot reflect the real harmonic characteristics, and the error is large

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  • Scene-divided Norton equivalent harmonic source model identification method considering distributed new energy
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  • Scene-divided Norton equivalent harmonic source model identification method considering distributed new energy

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[0075] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0076] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the application. Unless otherwise defined, 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.

[0077] It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components an...

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Abstract

The invention relates to a scene-divided Norton equivalent harmonic source model identification method considering distributed new energy, and the method comprises the following steps: S1, generating interval type data based on harmonic monitoring data and meteorological data, dividing a user typical harmonic scene considering distributed new energy power generation characteristics by using a density clustering and linear comprehensive change point detection method; S2, solving a probability density function of a system side harmonic impedance module value in a user typical harmonic scene by using kernel density estimation; and S3, constructing a scene-divided Norton equivalent harmonic source model based on harmonic monitoring statistics and meteorological data and considering distributed new energy. According to the method, the change of the harmonic characteristics of the system and the user and the influence of meteorological conditions on the distributed new energy harmonic characteristics can be identified.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a Norton equivalent harmonic source model identification method for sub-scenes considering distributed new energy. Background technique [0002] In recent years, a large number of distributed new energy grids have introduced a large number of inverters and other nonlinear loads into the power system, making the harmonic problem of the power system more and more serious. Establishing an appropriate harmonic source model to characterize the operating characteristics of harmonic pollution users can evaluate the degree of harm of harmonic pollution, clarify harmonic responsibilities, and analyze and treat existing harmonic problems. [0003] At present, power quality monitoring devices are widely used in power systems. The harmonic monitoring system has accumulated a large amount of harmonic monitoring data. However, in order to reduce the pressure of data storage, the current power qual...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/25G06F30/27G06K9/62G06N3/00G06F111/08G06F111/10
CPCG06F30/25G06F30/27G06N3/006G06F2111/08G06F2111/10G06F18/2321
Inventor 夏圣峰杨朝赟张嘉阳甘露吴振辉汪逸帆李戎李宽宏林蓥珊张逸刘必杰
Owner FUZHOU POWER SUPPLY COMPANY OF STATE GRID FUJIAN ELECTRIC POWER
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