Stability design of electric springs in power grids

Yun Yang, Siu Shing Ho, Siew Chong Tan, S. Y.R. Hui

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)

Abstract

When multiple stable systems are combined into one system, the newly formed hybrid system has a certain possibility to be unstable. Such a natural phenomenon has been verified in the fields of chemistry and biology over the last century. The use of electric springs (ES), which must be implemented in large quantity over the power grids, can also suffer from the same issue if specified design are not carried out. In this paper, a method of tuning Kp and Ki of the PI controllers of the ES to ensure the overall system stability in a weak grid is investigated. The method is based on the concept of relative stability and is achieved through the aid of simulation. Both simulation and experimental results validate that as the number of ES in the weak grid increases, more stringent values of Kp and Ki are required to achieve system stability. Apparently, a corresponding relationship between the optimal tuning of Kp and Ki of the PI controllers and the maximum number of ES installed in the weak grid exists. If the optimal values of Kp and Ki are adopted, a maximum number of ES can be stably installed over the grid.

Original languageEnglish
Title of host publication2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages6838-6844
Number of pages7
ISBN (Electronic)9781467371506
DOIs
Publication statusPublished - 27 Oct 2015
Event7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015 - Montreal, Canada
Duration: 20 Sep 201524 Sep 2015

Publication series

Name2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015

Conference

Conference7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015
Country/TerritoryCanada
CityMontreal
Period20/09/1524/09/15

Keywords

  • electric springs (ES)
  • hybrid system
  • optimal tuning
  • PI controller
  • Stability
  • weak grid

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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