Browsing by Subject "PSCAD/EMTDC"

Now showing 1 - 3 of 3

Algorithms for detecting missing voltage and motor starting events
(2016-08) Cho, Wanki; Santoso, Surya; Baldick, Ross
The objective of this work is to develop algorithms to detect voltage variation events in power quality data and to figure out their characteristics. Voltage variation events covered in this work are missing voltage and motor starting events. The first part of this work describes the fundamental concept, characteristics and sources of voltage variation events. Next, this work describes the algorithms to detect voltage variation events. The verification of the algorithms is performed using simulated data from PSCAD/EMTDC and actual field data. The results show that the performance of the algorithms and the characteristics of voltage variation events are satisfactory. This work contributes to the development of detecting voltage variation events from a real distribution system and the analysis of voltage variation events.
Modeling of a DC fuse for protection of semiconductor devices using PSCAD/EMTDC
(2010-05) Devarajan, Bhargavi; Kwasinski, Alexis
This thesis presents a new simulation model for DC fuses used to protect semiconductor devices using PSCAD /EMTDC. The basic construction and operation of fuses is discussed, highlighting the difference between the operations of AC and DC fuses. The melting and arcing models of the fuse are implemented separately. The modeling concept is explained in detail and the model is validated with experimental results.
Stability enhancement of power system with large-scale grid-connected wind farm and PV system by superconducting fault current limiter
(2018-08) Kim, Kisuk; Baldick, Ross
According to the Korean government’s new energy policy in 2017, high penetration of large-scale grid-connected renewable energy sources is soon expected to the Korean power system. This upcoming change will cause some problems on the grid, such as an increase of fault current level and a decrease of system inertia, which will affect negatively on the power systems stability. In this thesis, I suggest the utilization of a SFCL (superconducting fault current limiter) to improve the power system stability and reliability. The SFCL can limit fault current very quickly, efficiently, and automatically by using the quenching effect of the superconducting material. The focus of this work is to simulate different fault conditions and analyze the effectiveness of a hybrid SFCL for stable operation of a power system. The first part of this work is an introduction to superconductivity phenomenon and superconducting fault current limiters. Then, I modeled a hybrid SFCL with PSCAD/EMTDC software. Next, I set up simulation circuits on the IEEE 9 bus test system including wind farm and PV system. For the case studies, I considered the gradual increase of large-scale grid-connected wind farm and PV systems. Finally, I analyze the effect of a hybrid SFCL for power system stability.