Analysis of Current Unbalance in Meshed Transmission System

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Analysis of Current Unbalance in Meshed Transmission System

Popis výsledku v původním jazyce

The paper describes new approach of the calculation of current unbalance in a meshed transmission system. The system is composed of several parts with different types of towers, phase sequence arrangements, types of conductors and one or two transmission lines on the same tower. The calculations are performed by dividing the problem to a number of impedance matrices respecting the mutual impedances between all conductors. In the examined transmission system there exist parts with different number of lines but the same number of shield wires. For connection of parts with two transmission lines and two shield wires to another part with one transmission line and two shield wires, virtual shield wires must be created to keep the continuity of the calculations. After current unbalance calculations, necessary steps must be taken to symmetrize the part of the transmission system examined. Due to requirement of changing phase sequence arrangement only in one part of our system, classical way of transposition based on line division into three parts and alternation of conductors between themselves cannot be used. All possible phase sequence arrangements in each transmission line of the part of the system are examined, the best solution must be then calculated and selected.

Název v anglickém jazyce

Analysis of Current Unbalance in Meshed Transmission System

Popis výsledku anglicky

The paper describes new approach of the calculation of current unbalance in a meshed transmission system. The system is composed of several parts with different types of towers, phase sequence arrangements, types of conductors and one or two transmission lines on the same tower. The calculations are performed by dividing the problem to a number of impedance matrices respecting the mutual impedances between all conductors. In the examined transmission system there exist parts with different number of lines but the same number of shield wires. For connection of parts with two transmission lines and two shield wires to another part with one transmission line and two shield wires, virtual shield wires must be created to keep the continuity of the calculations. After current unbalance calculations, necessary steps must be taken to symmetrize the part of the transmission system examined. Due to requirement of changing phase sequence arrangement only in one part of our system, classical way of transposition based on line division into three parts and alternation of conductors between themselves cannot be used. All possible phase sequence arrangements in each transmission line of the part of the system are examined, the best solution must be then calculated and selected.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20704 - Energy and fuels

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

2015 16th International Scientific Conference on Electric Power Engineering (EPE)

ISBN

978-1-4673-6788-2

ISSN

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e-ISSN

2376-5623

Počet stran výsledku

5

Strana od-do

320-324

Název nakladatele

VŠB - Technical University of Ostrava

Místo vydání

Ostrava

Místo konání akce

Kouty nad Desnou

Datum konání akce

20. 5. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000377548600062