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This paper describes a formal method to assess the performance and risk related to electric power systems. A model of disturbance propagation is proposed to avail their impact on the expected levels of performance indicators and risk of Power Systems, and the contribution and cross impact from several market agents and actors during outages in the electric grid. The method is based on cascade disturbance...
The use of ultra high voltage direct current (UHVDC), i.e. voltages above the highest in use, 600 kV, has been found to be economically attractive for power blocks up to 6400 MW for distances above 1000 km. Several utilities in China, India and Brazil are at present planning for the use of 800 kV as transmission voltage. In order to meet the demands, ABB has been running an R&D program with the...
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...
This paper presents a new methodology to solve transmission expansion planning (TEP) problems based on evolution strategies (ES), but other heuristics are also used to assist the search process. The TEP problem includes the search for the least cost solution, bearing in mind investments and interruption costs. Unreliability costs are considered through the index LOLC-loss of load cost. Moreover, the...
This paper describes some software needs for reliability-centered maintenance (RCM) application to asset management. Based on the RCM structured approach, a set of information artifacts and probabilistic data are derived as necessary for the correct application of the methodology. The method and experimental software have been used by a Cigre task-force in Brazil, as a supporting tool to develop a...
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