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Distribution Level Composite Load Modeling

McCormick, Kevin (2023) Distribution Level Composite Load Modeling. Master's Thesis, University of Pittsburgh. (Unpublished)

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Traditionally, distribution systems analysis has been done using steady-state power flow solutions. This approach uses empirical or forecasted data for sources and loads, and the system is analyzed using basic engineering principles. Later, quasi-steady state analysis was used to introduce time variation in the model due to variations in weather and other seasonal conditions. However, due to the increasing penetration of distributed energy resources (DER) such as wind, solar, and storage, power systems analysis requires a more dynamic approach.
Traditional analysis has been done primarily by utilities for utilities, and a utility-based approach comes with limited customer-level fidelity. Often, they cannot look any further downstream than the substation level. Since many modern DERs are being installed at the residential level, this is becoming increasingly insufficient in modern modeling.
By applying dynamic modeling techniques at the distribution level, we can add fidelity to the model, and get a more accurate dynamic representation of these systems. For this work, a prototype of the Western Electricity Coordinating Council (WECC) composite load model, was developed for distribution systems dynamic analysis. The WECC model has be implemented and used in dynamic transmission systems analysis, but not at the distribution level.
Using the IEEE 13-node test feeder as the basis, a program was developed that takes inputs from a user and creates a WECC composite load model. This model is added to the desired node in the system. This process is repeatable, and every node may have a composite load if desired.
In this work, the history of the WECC model is discussed, followed by some background on distribution systems simulation. This is followed by some background on the components used in the model, along with a brief description of the different stages of development towards this model. Finally, we look at how these steps come together to create the final model and analyze the results.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Kerestes, Robertrjk39@pitt.edurjk39
Grainger, Brandonbmg10@pitt.edubmg10
Abdelhakim, Maimaia@pitt.edumaia
Date: 13 June 2023
Date Type: Publication
Defense Date: 7 April 2023
Approval Date: 13 June 2023
Submission Date: 7 April 2023
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 41
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Electrical and Computer Engineering
Degree: MS - Master of Science
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: Composite Load Model Dynamic Simulation WECC Model
Date Deposited: 13 Jun 2023 14:20
Last Modified: 13 Jun 2023 14:20

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