Voltage Regulation in Weak Distribution Grids Using Transformerless Series Compensators

Senthooran Balasubramaniam, Grazia Todeschini, Petar Igic

Research output: Chapter in Book/Report/Conference proceedingConference proceedingpeer-review

2 Citations (Scopus)


With increasing penetration of distributed generators (DGs), existing distribution grids are becoming weaker. As a result, voltage regulation in distribution grids impose a significant challenge and can be improved by introducing additional control apparatuses. In this paper, a transformerless static synchronous series compensator (T-SSSC) is adopted to maximise the power transfer between DGs and a weak grid by improving grid voltage stability. A new control strategy is introduced to reduce the number of switching events during the operation of a T-SSSC, thus limiting the switching losses. Furthermore, a new droop based control scheme is proposed to minimise the voltage unbalance between phases. A medium voltage distribution grid with embedded T-SSSCs modelled in Simulink has been used to verify the effectiveness of the proposed control schemes. For completeness, the performance a T-SSSC is investigated following a sudden change in grid short circuit level.
Original languageEnglish
Title of host publication2019 IEEE Power & Energy Society General Meeting (PESGM)
Number of pages5
ISBN (Electronic)978-1-7281-1981-6
Publication statusPublished - 30 Jan 2020
Externally publishedYes
Event2019 IEEE Power & Energy Society General Meeting - Atlanta, United States
Duration: 4 Aug 20198 Aug 2019

Publication series

NameIEEE Power and Energy Society General Meeting
ISSN (Print)1944-9925
ISSN (Electronic)1944-9933


Conference2019 IEEE Power & Energy Society General Meeting
Abbreviated titlePESGM
Country/TerritoryUnited States
Internet address


  • distributed generation
  • short circuit ratio
  • static synchronous compensator
  • voltage unbalance

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Nuclear Energy and Engineering
  • Renewable Energy, Sustainability and the Environment


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