Thesis

Review of applications of superconducting magnetic energy storage (SMES) to power systems

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Awarding institution
  • University of Strathclyde
Date of award
  • 2022
Thesis identifier
  • T16147
Person Identifier (Local)
  • 201850439
Qualification Level
Qualification Name
Department, School or Faculty
Abstract
  • A critical review of SMES has been conducted through highlighting the main contributions on powerquality enhancement and system stability. Then, we can find applications in several industrial applicationssuch as: UPS, SFCLT. SMES has been applied in these applications because they have required fastcharging to compensate their demand as quick as possible. Also, its efficiency is approximately 95%which is higher than other secondary storage technologies. Through comparison with other technologiessuch as: batteries or supercapacitors, it’s difficult to choose the suitable storage element unless pros &cons of each of them is shown. Thus, Ragone plot is illustrated for identification of their optimal regions& limitations. Basically, ESDs are classified according to function & form. This means that most of storageelements are not used for the same purpose. Some of these technologies are dedicated for energymanagement. Other functions are relevant to power quality improvement & reliability. Furthermore, acomprehensive assessment for several ESDs is implemented by indicating the applicable or developedtechnologies & other options which is not applicable or have some limitations because of its cost or othertechnical challenges. In addition, SMES development over the last century is investigated using differentsuperconductive materials “ex: YBCO, BSCCO, MgB2”. In contrary, an extensive study of these materialsis accomplished through presenting their applications, advantages & their challenges. Thus, a properselection of appropriate material for magnet design is implemented according to the requiredcharacteristics. Hence, different SMES topologies & their control methods are discussed, in details, byshowing the equations, that govern its behaviour during operation. Furthermore, different storage modes:charging, discharging process; managing SMES operation & identifying the power flow direction from/toSMES. If SMES is charged, the power flow is directed from grid to SMES. In contrast, SMES releases itsstored power when discharged. Generally, VSC is much favourable for their simple configuration & lowerswitching losses compared to CSC. Finally, an economic assessment for SMES system is conducted toderive the main parameters affecting its total cost & the cases in which SMES can be profitable. On theother side, SMES cost is analysed, with help of diagrams and graphs, by assigning the cost proportionsof its components with respect of the total SMES cost. Several hypotheses are made relevant to fewprominent economic indicators “i.e., NPV”. Such an indicator is used for determination of its cost-effectiveness. Finally, a case study has been demonstrated in which SMES is applied for transmissionpower capability enhancement.
Advisor / supervisor
  • Yuan, Weijia
Resource Type
Note
  • Previously held under moratorium from 19 January 2022 until 19 January 2024.
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