Dr. Shammya Shananda Saha

Dr. Shammya Shananda Saha

Scientist II, Distribution Operation and Planning

Talks and Presentations

A Framework for Generating Synthetic Distribution Feeder using OpenStreetMap

October 14, 2019

Conference proceedings talk, Wichita State University, Wichita, Kansas

This work proposes a framework to generate synthetic distribution feeders mapped to real geo-spatial topologies using available OpenStreetMap data. The synthetic power networks can facilitate power systems research and development by providing thousands of realistic use cases. The location of substations is taken from recent efforts to develop synthetic transmission test cases, with underlying real and reactive power in the distribution network assigned using population information gathered from United States 2010 Census block data. The methods illustrate how to create individual synthetic distribution feeders, and groups of feeders across entire ZIP Code, with minimal input data for any location in the United States. The framework also has the capability to output data in OpenDSS format to allow further simulation and analysis. The slides for this talk is also available in PDF format.

Point-on-Wave Analysis of Three-Phase Induction Motor Drive Under Fault External to the Power Plant

August 06, 2018

Conference proceedings talk, Oregon Convention Center, Portland, Oregon

Point-on-wave analysis is used to evaluate the behavior of Adjustable Speed Drives (ASDs) with respect to faults external to the power plant. Faults are simulated for fault type (single-phase to ground and three-phase to ground) and five different fault resistances for each type to ensure similar voltage dip between those two. Results show that power consumption stays constant at a value lower than the steady state value for a single-phase fault that occurs below a threshold voltage of 85%. For a three-phase fault, the ASD works as a constant power load above a threshold terminal voltage of 86%, but under the value the power drops to zero but not linearly as assumed in the dynamic model of an ASD. Results also show that the positive sequence real power absorption profile differs between a single-phase and three-phase fault for the same amount of voltage dip which dictates the importance of including the fault type while deriving a positive sequence model of the drive for dynamic simulation. The poster for this is also available in PDF format.