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Method and system for acquiring short-circuit parameters of three-phase asymmetrical equipment in a power system

A short-circuit parameter and power system technology, applied in data processing applications, complex mathematical operations, instruments, etc., can solve problems such as inaccurate calculations, achieve good scalability and improve accuracy

Active Publication Date: 2022-05-03
POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
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Problems solved by technology

[0008] In view of the above defects or improvement needs of the prior art, the present invention provides a method for obtaining short-circuit parameters of three-phase asymmetric equipment in a power system. The technical problem of inaccurate calculation caused by short-circuit calculation after the system

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  • Method and system for acquiring short-circuit parameters of three-phase asymmetrical equipment in a power system
  • Method and system for acquiring short-circuit parameters of three-phase asymmetrical equipment in a power system

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[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0035] Aiming at the power system connected with the three-phase asymmetric power supply equipment, the invention proposes a method for obtaining general short-circuit parameters of the three-phase asymmetric equipment in the power system based on self-defined logic and algorithm. The short-circuit parameter acquisition method is based on the power grid platform, which is a software platform tha...

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Abstract

The invention discloses a short-circuit parameter acquisition method and system for three-phase asymmetric equipment in a power system, aiming at three-phase transformers including single-phase transformers, V / V wiring traction transformers, V / X wiring traction transformers, Scott transformers and impedance matching balance transformers. For the power grid of phase-asymmetric power supply equipment, when performing short-circuit fault analysis, an open custom-defined fault analysis platform is established to open the equivalent impedance of the three-phase symmetrical part of the power grid and the necessary parameters of various three-phase asymmetric equipment, using scripts Language, customize the flow and calculation logic of short-circuit current and voltage calculation, and hand over the customized script language to the script interpreter of the operating system to perform calculations to obtain the required short-circuit current and voltage results. The disclosed method has openness and scalability, can be flexibly expanded according to a new equivalent model of three-phase asymmetric equipment, and is suitable for the field of practical short-circuit fault analysis and calculation of power grids containing three-phase asymmetric equipment.

Description

technical field [0001] The invention belongs to the field of short-circuit calculation and analysis of power systems, and more particularly relates to a method and system for acquiring short-circuit parameters of three-phase asymmetric equipment in a power system. Background technique [0002] In the traditional three-phase symmetrical power system, when any equipment has a three-phase symmetrical short circuit or an asymmetrical short circuit, the symmetrical component method can be used to carry out short-circuit current analysis and calculation to meet the needs of power grid equipment selection and relay protection setting calculations. The needs of the system, that is, for the three-phase symmetrical system, as long as an equal-value circuit is established for all devices, the symmetrical component method can be applied. [0003] However, with the development of electrified railways, the three-phase asymmetry of its traction power supply equipment poses a challenge to t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/11G06F17/15G06Q50/06
CPCG06Q50/06G16Z99/00
Inventor 杨韵易江黄明辉石东源李一泉李银红曾耿辉陈金富王峰陈志光
Owner POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
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