Influence of failures of overhead lines on reliability of autonomous power supply system

Abstract

We research influence of failures of overhead lines on reliability of autonomous power supply system with distributed generation in the given article. Simulation of failures of overhead lines are done on the base of long-term data of exploitation distributing electricity networks. Considered autonomous power supply system consists of wind and solar power stations. Diesel generators are emergency sources of electricity in the system. For adequacy estimation of electricity supply we many times simulated and analyzed of random states of autonomous power supply system. Results of experimental research confirm that detailed accounting of statistics of real failures of overhead lines increases of quality of reliability analysis.

Modelling of diesel generator operating modes on the basis of the engine speed characteristic in autonomous photovoltaic systems

“…Figure 1 shows a visualization multi-year meteorological data sets. The data provided by these models were verified in various natural and climatic areas in Eastern Siberia and Russian Far East [7,8].…”

“…Currently, a variety of sources are available for reproducing solar radiation on a given territory. [7] provides their comprehensive description and an overview of related scientific research.…”

“…Multi-year meteorological data sets in FM 12 Synop and METAR code forms are processed line by line throughout meteorological measurements, and the multi-year chronology of climate events is established with a one-hour discrete step. [7] gives a full description of the methodology for processing and automatically correcting erroneous measurements and for eliminating time gaps in measurements of multi-year meteorological data sets in FM 12 Synop and METAR code forms.…”

Bulletin of the Polish Academy of Sciences: Technical Sciences

“…2. Percentage share of technological breaks in the power grid as a result of atmospheric overvoltages: 1 -cable damage, 2 -current transformer damage, 3 -cable joint damage, 4 -disconnector damage, 5 -spark gap damage, 6 -fault due to the field conditions, 7 -damage to station insulators, 8 -breaker damage, 9 -damage to the overhead line spark gap, 10 -short circuit of wires, 11 -damage to poles and their structural elements, 12 -breakage of lightning conductor, 13 -breakage of wire or railing, 14 -damage to overhead line insulators, 15 -damage at the transformer station, 16 -damage to the power transformer be ensured, which will be of great importance for the further development of the area [2].…”

“…At the same time, according to Fig. 1, this applies to networks of any rated voltage [1,2]. Owing to the failure, a power plant or power station may stop working and, as a result, work in production plants, hospitals and other facilities will be immobilized.…”