Determinación de los flujos de potencia y cortocircuito para la coordinación de protecciones en el nuevo alimentador L25 de la subestación Pujili mediante CYMDIST y CYMTCC.

In this work, the determination of power and short-circuit flows was performed for the coordination of overcurrent protections in the L25 feeder of the Pujilí substation, located in the Cotopaxi province of Pujilí canton. This feeder belongs to the Cotopaxi electricity company with an approximate length of 9.22 km on its trunk, distributing electricity to users in the center and north of the canton, with loads that are mostly residential and commercial. The project began with the collection of information of the medium voltage network and a field survey of the trunk, shunts, capacity of distribution transformers, loads and protective equipment throughout the feeder. With the information obtained, the feeder was modeled in the CYMDIST computer program with the current conditions, determined power flows in maximum, average and minimum demand, finding network imbalances, so it was decided to make changes in the topology of the feeder. With the same program, the simulation of maximum and minimum short-circuit currents in the 69 kV and 13.8 kV bars of the substation was executed, obtaining the three-phase, two-phase, two-phase ground and single-phase ground faults, which will be used to dimension the fuses and coordinate protective equipment. Through the CYMTCC program, the fuse-fuse, recloser-fuse, relay-reconnector coordination was defined, defining the minimum operating times and time-current curves between the different coordinated teams, which must protect the loads that are along of the entire feeder, acting selectively, quickly and effectively, during a failure.

• 主要作者: Armas Solís, Juan Carlos (author)
• 其他作者: Casa Lema, Byron Manuel (author)
• 格式: bachelorThesis
• 语言: spa
• 出版: 2020
• 主题: Eléctrica; Coordinación de protecciones; Curvas tiempo - corriente; CYMDIST
• 在线阅读: http://repositorio.utc.edu.ec/handle/27000/6801