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Two-dimensional admittance model construction method and device, terminal and readable storage medium

A construction method and Wiener technology, applied in the field of power system stability analysis and control, can solve problems such as complex results, difficult modeling, and difficult to be applied

Pending Publication Date: 2021-09-07
GUANGDONG POWER GRID CO LTD +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a two-dimensional admittance model construction method, device, terminal and readable storage medium to solve the difficulty in modeling and complex results in the establishment of a two-dimensional admittance model of a converter in the prior art , a technical problem that is difficult to be applied

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  • Two-dimensional admittance model construction method and device, terminal and readable storage medium

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Embodiment Construction

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0037] It should be understood that the step numbers used herein are only for convenience of description, and are not intended to limit the execution order of the steps.

[0038] It should be understood that the terminology used in the description of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the present invention. As used in this specification and the appended claims, the singular forms "a", "an"...

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Abstract

The invention discloses a two-dimensional admittance model construction method and device, a terminal and a readable storage medium, and the method comprises the steps: substituting a one-dimensional impedance model of a DC power grid into a three-dimensional admittance model of a tested device, and obtaining a two-dimensional admittance model, considering the dynamic state of the DC power grid, of the AC side of the tested device, wherein the three-dimensional admittance model is established according to alternating current side parameters and direct current side parameters of the tested equipment. According to the two-dimensional admittance model construction method provided by the invention, the DC power grid dynamic state and the admittance model of the tested equipment are depicted separately, so the modeling process is simplified, and the modeling efficiency is greatly improved; meanwhile, the method is not limited by the condition that the topology or dynamic state of the direct-current power grid is relatively complex, the admittance model of the tested equipment under different dynamic states of the direct-current power grid can be visually and quantitatively analyzed, and the real-time updating capability, the applicability and the reliability of the model are high.

Description

technical field [0001] The invention relates to the technical field of power system stability analysis and control, in particular to a two-dimensional admittance model construction method, device, terminal and readable storage medium. Background technique [0002] The admittance (impedance) model of the AC side of the converter is a widely used model in the research of the interaction between the converter and the grid and the unstable oscillation of the AC grid. When the frequency coupling effect in the converter is considered, but the control outer loop of the converter is not considered, the impedance and admittance models of the AC side of the converter are both a two-dimensional matrix, and the mathematical form of the model is relatively simple. [0003] However, if factors such as the fluctuation of the DC power grid and the DC voltage control of the outer loop are considered, the mathematical expression of the two-dimensional admittance matrix of the converter will e...

Claims

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Application Information

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IPC IPC(8): H02J3/24H02J5/00
CPCH02J3/241H02J5/00H02J2203/20Y02E60/60
Inventor 伍双喜杨银国谢小荣陈垒刘洋向丽玲陆秋瑜于珍
Owner GUANGDONG POWER GRID CO LTD
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