Title page for ETD etd-12182015-124025


Type of Document Master's Thesis
Author Mitchell-Colgan, Elliott
Author's Email Address emc2@vt.edu
URN etd-12182015-124025
Title Modeling Considerations for the Long-Term Generation and Transmission Expansion Power System Planning Problem
Degree Master of Science
Department Electrical and Computer Engineering
Advisory Committee
Advisor Name Title
Virgilio Centeno Committee Chair
Jaime De La Ree Committee Member
James Thorp Committee Member
Keywords
  • Load Uncertainty
  • Optimization
  • Power System Planning
Date of Defense 2015-12-04
Availability unrestricted
Abstract
Judicious Power System Planning ensures the adequacy of infrastructure to support continuous

reliability and economy of power system operations. Planning processes have a long and

rather successful history in the United States, but the recent influx of unpredictable, nondispatchable

generation such as Wind Energy Conversion Systems (WECS) necessitates the

re-evaluation of the merit of planning methodologies in the changing power system context.

Traditionally, planning has followed a logical progression through generation, transmission,

reactive power, and finally auxiliary system planning using expertise and ranking schemes.

However, it is challenging to incorporate all of the inherent dependencies between expansion

candidates’ system impacts using these schemes. Simulation based optimization provides a

systematic way to explore acceptable expansion plans and choose one or several ”best” plans

while considering those complex dependencies.

Using optimization to solve the minimum-cost, reliability-constrained Generation and Transmission

Expansion Problem (GTEP) is not a new concept, but the technology is not mature.

This work inspects: load uncertainty modeling; sequential (GEP then TEP) versus unified

(GTEP) models; and analyzes the impact on the methodologies achieved near-optimal plan.

A sensitivity simulation on the original system and final, upgraded system is performed.

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