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Utilizing Under Voltage Load Shedding Strategy to Prevent Delayed Voltage Recovery Problem in Korean Power System

Authors
Lee, Yun-HwanOh, Seung-ChanLee, Hwan-IkPark, Sang-GeonLee, Byong-Jun
Issue Date
1월-2018
Publisher
SPRINGER SINGAPORE PTE LTD
Keywords
Delayed voltage recovery; Motor stall; Load shedding; Voltage instability
Citation
JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY, v.13, no.1, pp.60 - 67
Indexed
SCIE
SCOPUS
KCI
Journal Title
JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY
Volume
13
Number
1
Start Page
60
End Page
67
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/78437
DOI
10.5370/JEET.2018.13.1.060
ISSN
1975-0102
Abstract
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.
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공과대학 (전기전자공학부)
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