Evaluation method for determining of the probability of an asymmetrical fault location in a distribution network and a monitoring system for performing such method

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F17%3APA21445" target="_blank" >RIV/00216305:26220/17:PA21445 - isvavai.cz</a>

Výsledek na webu

<a href="https://register.epo.org/application?number=EP15163595&tab=main" target="_blank" >https://register.epo.org/application?number=EP15163595&tab=main</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Evaluation method for determining of the probability of an asymmetrical fault location in a distribution network and a monitoring system for performing such method

Popis výsledku v původním jazyce

The present invention relates to a method of determining probability of unsymmetrical failure occurrence points in electrical networks, where a backward chart of monitored distribution system is created, a coordination time of a failure occurrence is evaluated based on exceeding a change limit of a current negative phase-sequence component, records of change of a voltage negative phase-sequence component recorded on secondary sides of the distribution transformers (VN/NN) and records of negative phase-sequence components of currents withdrawn from feeding transformers (VVN/VN) are collected for the given coordination time of the failure occurrence. Subsequently, values of maximum change in the current and voltage negative phase-sequence components, corresponding to the instant at which the sum of all the recorded changes in the voltage negative phase-sequence components is maximal are determined. The values of the maximum change in the voltage negative phase-sequence components are converted to the primary side of a corresponding distribution transformer (VN/NN). Individual deviations of absolute values of the calculated changes of the voltage negative phase-sequence component and recorded values of the maximum change in the voltage phase-sequence component at the individual measuring nodes (MU) are then calculated from the converted maximum changes in the voltage phase-sequence components and the current phase-sequence components. Then total deviations of the absolute values of the calculated changes in voltage phase-sequence components and recorded values of the maximum changes in the voltage phase-sequence components for the individual nodes are calculated, and finally, a probability of occurrence of the asymmetry source in individual points of the monitored system is calculated.

Název v anglickém jazyce

Evaluation method for determining of the probability of an asymmetrical fault location in a distribution network and a monitoring system for performing such method

Popis výsledku anglicky

The present invention relates to a method of determining probability of unsymmetrical failure occurrence points in electrical networks, where a backward chart of monitored distribution system is created, a coordination time of a failure occurrence is evaluated based on exceeding a change limit of a current negative phase-sequence component, records of change of a voltage negative phase-sequence component recorded on secondary sides of the distribution transformers (VN/NN) and records of negative phase-sequence components of currents withdrawn from feeding transformers (VVN/VN) are collected for the given coordination time of the failure occurrence. Subsequently, values of maximum change in the current and voltage negative phase-sequence components, corresponding to the instant at which the sum of all the recorded changes in the voltage negative phase-sequence components is maximal are determined. The values of the maximum change in the voltage negative phase-sequence components are converted to the primary side of a corresponding distribution transformer (VN/NN). Individual deviations of absolute values of the calculated changes of the voltage negative phase-sequence component and recorded values of the maximum change in the voltage phase-sequence component at the individual measuring nodes (MU) are then calculated from the converted maximum changes in the voltage phase-sequence components and the current phase-sequence components. Then total deviations of the absolute values of the calculated changes in voltage phase-sequence components and recorded values of the maximum changes in the voltage phase-sequence components for the individual nodes are calculated, and finally, a probability of occurrence of the asymmetry source in individual points of the monitored system is calculated.

Druh

P - Patent

CEP obor

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OECD FORD obor

20704 - Energy and fuels

Projekt

<a href="/cs/project/LO1210" target="_blank" >LO1210: Energie v podmínkách udržitelného rozvoje (EN-PUR)</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Číslo patentu nebo vzoru

EP2940483

Vydavatel

EPO_1 -

Název vydavatele

European Patent Office

Místo vydání

Munich, The Hague, Berlin, Vienna, Brussels

Stát vydání

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Datum přijetí

5. 4. 2017

Název vlastníka

Vysoké ucení technické v Brne Antonínská 548/1 60190 Brno / CZ

Způsob využití

A - Výsledek využívá pouze poskytovatel

Druh možnosti využití

A - K využití výsledku jiným subjektem je vždy nutné nabytí licence