Evaluation of overhead lines current unbalance in meshed grids and its reduction

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F18%3A00326667" target="_blank" >RIV/68407700:21230/18:00326667 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/article/10.1007%2Fs40565-018-0387-3" target="_blank" >https://link.springer.com/article/10.1007%2Fs40565-018-0387-3</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s40565-018-0387-3" target="_blank" >10.1007/s40565-018-0387-3</a>

Result language

angličtina

Original language name

Evaluation of overhead lines current unbalance in meshed grids and its reduction

Original language description

This paper describes new methodology in the current unbalance calculations in meshed grids. The meshed grids, mainly the transmission ones, consist of more parts connected together which are formed using different conductor types, phase sequence arrangements, tower constructions, and various number of lines on the same tower. Therefore several computational challenges arise in comparison with the widely discussed point-to-point configuration. The methodology divides the grid into a number of impedance matrices respecting all the self and mutual impedances among all conductors and all parallel lines. Another challenging issue for the lines impedance description is changing the number of shield wires along the line if the line is composed of several sections with different tower configurations. For the current unbalance calculation, shield wires must also be included in the algorithms, and matrices of various dimensions can be obtained. For the overall matrix description to be used, dimensions of all matrices in final equations must be equal, and therefore the virtual shield wires are created. To compare more conductor transposition cases with each other, the line loadings caused by voltage sources should be equal. This is necessary mainly in case of meshed grids where the supplying sources on different lines can have strong mutual couplings. This can be achieved by an appropriately designed optimization of the connected voltage sources.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20201 - Electrical and electronic engineering

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Modern Power Systems and Clean Energy

ISSN

2196-5625

e-ISSN

2196-5420

Volume of the periodical

6

Issue of the periodical within the volume

6

Country of publishing house

DE - GERMANY

Number of pages

9

Pages from-to

1204-1212

UT code for WoS article

000449273500009

EID of the result in the Scopus database

2-s2.0-85056129740