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This paper discusses methods and criteria for the assessment of the low voltage ride-through (LVRT) needs of the power grid. Simulation techniques are used to investigate both how voltage dips caused by short-circuits spread over the grid and what impact do they cause in the operation performance of power systems with wind generation. The analysis is performed for wind turbines (WT) with different...
This paper presents a remote fault detection and identification system for transmission lines, permitting elimination, or at least minimizing, the use of maintenance methods employed by power utilities, as a result of its technical potential and capability to reduce operational costs. It consists of a data acquisition system, capable of acquiring and storing high frequency signals present in the TLs...
Para-consistent Logic is a non-classic logic whose foundations allow for the contradictions treatment without invalidating the conclusions. Several researches have been demonstrating that through algorithms named PANs - Paraconsistent Analysis Nodes is possible to establish equations determined through signals representing restrictions, risks and configurations of electric power systems networks....
In order to protect in case of fault on the Macagua-Callao-Claritas 400 kV line that supply energy to Eletronorte utilities in Brazil, a particular protection scheme was designed under a fault detection table, which allowed to evaluate the different scenarios in case of the internal and external fault. This scheme are made up of relays of distance and directional overcurrent in the three substations...
Summary form only given, as follows. This paper develops a method to analyze energy stresses on transmission line surge arresters. The approach computes the failure rate of arresters due to energy stresses, convolving the density probabilities of first and subsequent pulses. Multipulse stroke effects are considered in a 138 kV line case study, typical of single circuit lines, located in regions with...
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