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Sensitivity analysis-based dominant measurement error analysis method for transformer parameter identification

A technology for transformer parameter and sensitivity analysis, applied in the direction of measuring electrical variables, instruments, measuring devices, etc.

Pending Publication Date: 2022-07-15
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In practical applications, when PMU data inevitably has errors and there is a certain gap between the identification results and the theoretical value, there is a problem of measuring the credibility and usability of the identification results. Therefore, the relevant factors that affect the identification results need to be further studied.

Method used

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  • Sensitivity analysis-based dominant measurement error analysis method for transformer parameter identification
  • Sensitivity analysis-based dominant measurement error analysis method for transformer parameter identification
  • Sensitivity analysis-based dominant measurement error analysis method for transformer parameter identification

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Embodiment Construction

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0022] The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings, and the specific analysis process is as follows:

[0023] figure 1 It is a flow chart of the present invention, comprising the following steps:

[0024] Step 1: Establish a positive sequence equivalent model of the transformer and obtain the PMU data on the three sides of the transformer.

[0025] Establis...

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Abstract

The invention discloses a dominant measurement error analysis method for transformer parameter identification based on sensitivity analysis. According to the method, dominant measurement errors influencing transformer parameter identification are determined by adopting a sensitivity analysis method. Specifically, firstly, a transformer parameter identification method based on a three-winding positive sequence equivalent model is introduced; secondly, theoretically calculating the sensitivity of the parameter pair measurement to be identified by adopting a sensitivity analysis method; thirdly, the correctness of a theoretical calculation result is verified through simulation; and finally, determining dominant measurement errors influencing transformer parameter identification by analyzing theoretical calculation and simulation results.

Description

technical field [0001] The invention relates to the field of power system operation control and protection, in particular to a dominant measurement error analysis method for transformer parameter identification based on sensitivity analysis. Background technique [0002] Phasor Measurement Units (PMUs) are widely installed and used because of their synchronization, rapidity, and accuracy, and are one of the most important grid monitoring tools that provide dynamic visibility of power system states. The PMU measures the voltage and current phasors of the installed bus and the frequency of the bus with high accuracy, which provides good conditions for parameter identification. [0003] With the vigorous development of the manufacturing industry, the scale of my country's power system is expanding, the power demand and voltage level are constantly increasing, and large-capacity power transformers are more and more widely used. Large-scale transformers are expensive and complex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00G06F30/20
CPCG01R35/005G06F30/20
Inventor 薛安成马婧陶畅顾雷
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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