Impact of Uncertainty from Load-Based Reserves and Renewables on Dispatch Costs and Emissions

Conference · Mon Nov 21 04:00:00 EST 2016

DOI:https://doi.org/10.1109/NAPS.2016.7747830· OSTI ID:1342080

Li, Bowen; Maroukis, Spencer D.; Lin, Yashen; Mathieu, Johanna L.

Aggregations of controllable loads are considered to be a fast-responding, cost-efficient, and environmental-friendly candidate for power system ancillary services. Unlike conventional service providers, the potential capacity from the aggregation is highly affected by factors like ambient conditions and load usage patterns. Previous work modeled aggregations of controllable loads (such as air conditioners) as thermal batteries, which are capable of providing reserves but with uncertain capacity. A stochastic optimal power flow problem was formulated to manage this uncertainty, as well as uncertainty in renewable generation. In this paper, we explore how the types and levels of uncertainty, generation reserve costs, and controllable load capacity affect the dispatch solution, operational costs, and CO2 emissions. We also compare the results of two methods for solving the stochastic optimization problem, namely the probabilistically robust method and analytical reformulation assuming Gaussian distributions. Case studies are conducted on a modified IEEE 9-bus system with renewables, controllable loads, and congestion. We find that different types and levels of uncertainty have significant impacts on dispatch and emissions. More controllable loads and less conservative solution methodologies lead to lower costs and emissions.

• Research Organization: NREL (National Renewable Energy Laboratory (NREL), Golden, CO (United States))
• Sponsoring Organization: National Science Foundation (NSF)
• DOE Contract Number: AC36-08GO28308
• OSTI ID: 1342080
• Report Number(s): NREL/CP-5D00-67828
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
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schedules
stochastic processes
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uncertainty
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