Adaptive wams-based secondary voltage control

Heng Yi Su, Jian Hong Liu, Chia Chi Chu*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


Voltage instability is a growing threat to the security and the reliability of power grids, especially as the penetration level of intermittent renewable energies increase significantly in recent years. Voltage instability and even voltage collapse will take place as the loss of control of the voltage profiles in a power system. To achieve more efficient voltage regulation in power systems, the hierarchical three-level coordinated voltage control mechanism has been developed recently to prevent voltage collapse through the appropriate management of reactive power sources. This chapter presents recent developments in adaptive secondary voltage control (SVC) by utilizing real-time measurements of power systems obtained from the wide-area measurement system (WAMS). These methods are adaptive in the sense that load disturbances are estimated from synchronized phasors of WAMS in nearly real-time. Thus, these control inputs of SVC can be synthesized to minimize deviations in load voltage profiles under the worst-case scenario. Uncertainties in measurement are also taken into considerations by exploring the maximum likelihood (ML) method to further improve SVC performance. Comprehensive simulations on a variety of IEEE benchmark systems have been performed to verify the feasibility and the effectiveness of these schemes.

Original languageEnglish
Title of host publicationPower Systems
PublisherSpringer Science and Business Media Deutschland GmbH
Number of pages20
StatePublished - 2021
Externally publishedYes

Publication series

NamePower Systems
ISSN (Print)1612-1287
ISSN (Electronic)1860-4676

Bibliographical note

Publisher Copyright:
© The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG 2021.


  • Maximum likelohood
  • Phasor measurement unit (PMU)
  • Secondary voltage control (SVC)
  • Wide area measurement system (WAMS)
  • Worst-case design


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