Browsing by Keyword "Power generation"
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Item Condition assessment of 230 kV cables at a power plant. Study of remaining life and life extension(IEEE, 2019) Kortajarena, A.; Loureiro, I.; Saralegi, M.; Moreno, S.; Generales; Electric Campo; Electric Alta TensiónThe reliability of the electricity network and the necessity to reduce to a minimum the economic losses due to unexpected outages at the power plants, have led utilities to introduce extensive programs for diagnostics and predictive maintenance, with the purpose of evaluating the condition of the high voltage cables and their remaining life under normal service condition. The paper presents the experience gained in the condition assessment of 230 kV cables installed at a hydropower plant in Colombia, using the most updated techniques for offline and online testing, a full inspection of the installation and a thorough analysis of the events recorded during its service lifetime. Technical findings were matched with economic and strategic criteria. The result of the activities was the development of a novel methodology to assess the remaining life of the cables at its present condition and draw a life extension program for the short and long term. The project was tendered by one of the main utilities in Colombia. The main contractor was TECNALIA, one of the leading Research and Testing institutes in Europe, with a large experience in the condition assessment of HV cables.Item Integration of der into power system operation through Virtual Power Plant concept applied for voltage regulation(2009) Oyarzabal, José; Martí, Juan; Ilo, Albana; Sebastian, María; Alvira, David; Johansen, Knud; POWER SYSTEMSThis paper reports on the solution adopted at the Southern Scenario demonstrator of the R&D project FENIX for the effective integration of distributed energy resources (DER) into power system operation. DER reactive power production, on load tap changers (OLTC) and shunt capacitors are optimally coordinated to alleviate/eliminate distribution network constraints. This general objective is defined within an optimal power flow (OPF) algorithm targeting other goals such as network losses reduction or influencing transmission network node' voltages. A commercial distribution management system (DMS) is adapted to integrate the voltage VAr control (VVC) module and the whole system is brought into operation with real time measurements and commands send on open loop basis.Item Integration of DER into power system operation through virtual power plant concept applied for voltage regulation(2009) Oyarzabal, José; Martí, Juan; Ilo, Albana; Sebastian, María; Alvira, David; Johansen, Knud; POWER SYSTEMSThis paper reports on the solution adopted at the Southern Scenario demonstrator of the R&D project FENIX for the effective integration of distributed energy resources (DER) into power system operation. DER reactive power production, on load tap changers (OLTC) and shunt capacitors are optimally coordinated to alleviate/eliminate distribution network constraints. This general objective is defined within an optimal power flow (OPF) algorithm targeting other goals such as network losses reduction or influencing transmission network node' voltages. A commercial distribution management system (DMS) is adapted to integrate the voltage VAr control (VVC) module and the whole system is brought into operation with real time measurements and commands send on open loop basis.