Next Article in Journal / Special Issue
CARS Algorithm-Based Detection of Wheat Moisture Content before Harvest
Previous Article in Journal
Maximum-Entropy-Model-Enabled Complexity Reduction Algorithm in Modern Video Coding Standards
Previous Article in Special Issue
Autonomous Detection for Traffic Flow Parameters of a Vehicle-Mounted Sensing Device Based on Symmetrical Difference
Open AccessArticle

Recognition Algorithm of Transient Overvoltage Characteristic Based on Symmetrical Components Estimation

Department of Mechanical and Electrical, Henan Polytechnic Institute, Nanyang 473000, China
*
Author to whom correspondence should be addressed.
Symmetry 2020, 12(1), 114; https://doi.org/10.3390/sym12010114
Received: 11 November 2019 / Revised: 20 December 2019 / Accepted: 25 December 2019 / Published: 7 January 2020
The recognition of transient overvoltage characteristics is the premise of disturbance compensation of the transient overvoltage. Based on that, the recognition algorithm of transient overvoltage characteristics based on symmetrical components estimation was proposed. The generation mechanism of the transient overvoltage in gas insulated switchgear (GIS) was analyzed. Then, the transient overvoltage was measured via the capacitive sensor method. The three-phase voltage of ultra-high voltage grid was asymmetrical when the transient overvoltage appeared. At present, the asymmetrical three-phase voltage was decomposed into the superposition of a symmetrical positive-sequence component, a negative-sequence component, and a zero-sequence component via the symmetrical components estimation to build the superposition model. The model was decomposed via the trigonometric identity and the modified neural network of the least mean square learning rule was used to estimate the parameter vector of the characteristic quantity of the transient overvoltage in real time. The feasibility of the proposed algorithm was verified via comparing the simulation of the proposed algorithm and the algorithm based on dp transformation. The experimental results show that the proposed algorithm has the advantages of a small operand, high detection precision, and fast action.
Keywords: symmetrical components estimation; transient overvoltage; characteristic; recognition; components superposition; trigonometric identity symmetrical components estimation; transient overvoltage; characteristic; recognition; components superposition; trigonometric identity
MDPI and ACS Style

Han, Y.; Zhang, J. Recognition Algorithm of Transient Overvoltage Characteristic Based on Symmetrical Components Estimation. Symmetry 2020, 12, 114.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop