Author: Yeung, Chi On
Title: Risk assessment of power system security for operational planning
Degree: M.Sc.
Year: 2022
Subject: Wind power -- Risk management
Electric power system stability
Renewable energy sources
Renewable energy sources
Hong Kong Polytechnic University -- Dissertations
Department: Department of Electrical Engineering
Pages: xix, 116 pages : color illustrations
Language: English
Abstract: A new Holomorphic Embedding Load Flow Method HELM with different embedded equations is proposed to solve the probabilistic power flow problem and original power flow problem with respect to change in operating conditions in one particular bus specified in the equations. The numerical implementation of proposed non-iterative HELM is simple requiring linear algebra and Padé Approximant only. It guarantees to converge to an operable solution if one exists hence having a better performance comparing to traditional iterative methods when near voltage collapse point. When dealing with a large amount of power flow simulations, proposed HELM has a smaller computation burden comparing to other numerical methods because the system parameters can be explicitly expressed by rational fractions as functions of complex power injection at another pre-determined bus. The original power flow solution can be obtained online by simple substitution to the rational fraction without doing the whole computational process again which can save tremendous amount of time. Moreover, proposed HELM helps system operator to perform offline risk assessment during operational planning at different operating conditions as the likelihood of different system risks can be computed using probability distribution function generated from proposed HELM model. Hence, system operator can take proactive action when dealing with fluctuation of renewable energy power output. In this dissertation, wind power probabilistic model is used to demonstrate this idea. The explicit form of the distribution function is also derived in this dissertation.
Rights: All rights reserved
Access: restricted access

Files in This Item:
File Description SizeFormat 
6951.pdfFor All Users (off-campus access for PolyU Staff & Students only)2.21 MBAdobe PDFView/Open

Copyright Undertaking

As a bona fide Library user, I declare that:

  1. I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
  2. I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
  3. I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.

By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.

Show full item record

Please use this identifier to cite or link to this item: