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HUFNAGL, E., AIGNER, M., SCHMAUTZER, E.
EVALUATION OF AN URBAN MEDIUM VOLTAGE NETWORK USING RELIABILITY INDICES
KOMUNALNA ENERGETIKA / POWER ENGINERING, 26
This article deals with the assessment of reliability indices of a medium voltage network. In order to evaluate an urban medium voltage network, several steps can be taken to determine the reliability indices describing the network in its current state, as well as for potential changes caused by e.g. reinforcement of the electrical installation, restructuring measures, increased generation and demand in the network structure. To successfully conduct the following calculations, the correct use of the input data for the created reliability datatypes and reliability values is essential. By using reliability indices an impartial comparison between various options (referring to the cited measures) is possible.
HUFNAGL, E., FICKERT, L., SCHMAUTZER, E.
EFFICIENT CALCULATION OF EARTH FAULT CURRENTS IN COMPENSATED NETWORKS
KOMUNALNA ENERGETIKA / POWER ENGINERING, 29
In this paper, a simplified approach for determining the ground fault currents is presented which is specifically useful in compensated systems. In this case, due to the estimation of the relative magnitudes of the equipment parameters, the equivalent circuit in symmetrical components of the single-pole fault is significantly reduced. Thus the electrical parameters of the impedances can be directly used.
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