대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 2005년도 제36회 하계학술대회 논문집 A
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- Pages.211-213
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- 2005
계전기를 위한 고속의 주교수 계측 알고리즘
The Study of Fast Frequency Measurement Technique for Protection Relay
- Kim, Beung-Jin (Hyundai Heavy Industries Co.,Ltd.) ;
- Lee, Chang-Ho (Hyundai Heavy Industries Co.,Ltd.) ;
- Park, Jong-Chan (OSan College)
- 발행 : 2005.07.18
초록
In this paper, the frequency compensator for digital protective relay is introduced. Due to sudden appearance of generation-load or fault in power system, the frequency can deviate from its nominal value. The Orthogonal filter adopted to digital protective relay is exposed to the problem. Therefore, the frequency variation makes a difficult to protective function and power measurement in digital protective relay. The essential property of the proposed algorithm presented is its outstanding immunity to both signal orthogonal component magnitudes and DFT filter gain variations which ensures below 0.05Hz accuracy of estimation. Additionally, the proposed method has excellent characteristics with low signal sampling rate. Based on the frequency estimation, author design under frequency protection relay for generator and verifies its performance with several experimental tests.
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