Utilizing under voltage load shedding strategy to prevent delayed voltage recovery problem in korean power system

Yun Hwan Lee, Seung Chan Oh, Hwan Ik Lee, Sang Geon Park, Byong Jun Lee

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


The presence of induction motor loads in a power system may cause the phenomenon of delayed voltage recovery after the occurrence of a severe fault. A high proportion of induction motor loads in the power system can be a significant influence on the voltage stability of the system. This problem referred to as FIDVR(Fault Induced Delayed Voltage Recovery) is commonly caused by stall of small HVAC unit(Heating, Ventilation, and Air Conditioner) after transmission or distribution system failure. This delayed voltage recovery arises from the dynamic characteristics associated with the kinetic energy of the induction motor load. This paper proposes the UVLS (Under Voltage Load Shedding) control strategy for dealing with FIDVR. UVLS based schemes prevent voltage instability by shedding the load and can help avoid major economic losses due to wide-ranging cascading outages. This paper review recent topic about under voltage load shedding and compare decentralized load shedding scheme with conventional load shedding scheme. The load shedding strategy is applied to an actual system in order to verify the proposed FIDVR mitigation solution. Simulations demonstrate the effectiveness of the proposed method in resolving the problem of delayed voltage recovery in the Korean Power System.

Original languageEnglish
Pages (from-to)60-67
Number of pages8
JournalJournal of Electrical Engineering and Technology
Issue number1
Publication statusPublished - 2018 Jan


  • Delayed voltage recovery
  • Load shedding
  • Motor stall
  • Voltage instability

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


Dive into the research topics of 'Utilizing under voltage load shedding strategy to prevent delayed voltage recovery problem in korean power system'. Together they form a unique fingerprint.

Cite this