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Distributed Flexible AC Transmission Systems (D-FACTS) devices can be used as a distributed solution for relieving congestion in transmission lines. In this work, a model for D-FACTS devices is developed in an electromagnetic transients program and steady-state performance is validated against the existing model in PowerWorld. The devices are implemented in the IEEE12 bus dynamic test system. System...
Evaluation of relay misoperations provides an opportunity to improve the design of backup protection schemes. Existing generator station backup protection schemes use distance protection (21) or voltage controlled/restrained overcurrent protection (51V) elements for clearing phase faults that are not cleared by either line protection or generator protection. Many schemes also use transformer ground...
The performance of a distance protection scheme along with related supervisory elements is investigated when a shunt connected static synchronous compensator (STATCOM) is tapped to the midpoint of a transmission line. The paper examines responses for different fault types and locations while the STATCOM absorbs reactive power and is being controlled by two different control schemes. An emtp-type model...
Generation connected to the transmission system via inverters (electronically coupled generation) is a growing. Utility protection engineers conventionally use impedance matrix algorithms to determine fault current magnitudes and angles, perform coordination studies, and guide relay settings. In transmission protection studies, it has thus far been common practice to exclude the fault current contributions...
We propose an optimization approach to design cost-effective electrical power transmission networks. That is, we aim to select both the network structure and the line conductances (line sizes) so as to optimize the trade-off between network efficiency (low power dissipation within the transmission network) and the cost to build the network. We begin with a convex optimization method based on the paper...
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