Protection algorithm for a wind turbine generator based on positive- and negative-sequence fault components

Tai-Ying Zheng, Seung-Tae Cha, Peter A. Crossley, Yong-Cheol Kang

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Abstract

A protection relay for a wind turbine generator (WTG) based on positive- and negative-sequence fault components is proposed in the paper. The relay uses the magnitude of the positive-sequence component in the fault current to detect a fault on a parallel WTG, connected to the same power collection feeder, or a fault on an adjacent feeder; but for these faults, the relay remains stable and inoperative. A fault on the power collection feeder or a fault on the collection bus, both of which require an instantaneous tripping response, are distinguished from an inter-tie fault or a grid fault, which require a delayed tripping, using the magnitude of the positive-sequence component in the fault current. The fault type is first evaluated using the relationships between the positive- and
negative-sequence fault components depending on type of fault. Then the magnitude of the positive-sequence component in the fault current is used to decide on either instantaneous or delayed operation. The operating performance of the relay is then verified using various fault scenarios modelled using EMTP-RV. The scenarios involve changes in the position and type of fault, and the faulted phases. Results confirm that the relay can successfully distinguish between faults that require an instantaneous, delayed or non-operation response.
Original languageEnglish
Title of host publicationProceedings of APAP
PublisherIEEE
Publication date2011
Pages1115-1120
ISBN (Print)978-1-4244-9621-1
Publication statusPublished - 2011
EventThe International Conference on Advanced Power System Automation and Protection - The Beijing International Convention Center, Beijing, China
Duration: 16 Oct 201120 Oct 2011

Conference

ConferenceThe International Conference on Advanced Power System Automation and Protection
LocationThe Beijing International Convention Center
CountryChina
CityBeijing
Period16/10/201120/10/2011

Keywords

  • Wind turbine generator protection
  • Outage section minimization
  • Instantaneous operation
  • Delayed operation
  • Non-operation
  • Symmetrical components

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