高性能輸電線保護電驛系統的設計(2/2)
Date Issued
2004-07-31
Date
2004-07-31
Author(s)
DOI
922213E002030
Abstract
This project presents an adaptive fault protection
scheme for transmission lines using synchronized phasor
measurements. The protective functions include fault detection,
direction discrimination, classification and location. Both fault
detection and fault location indices are derived by using twoterminal
synchronized measurements incorporated with
distributed line model and modal transformation theory. The fault
detection index is composed of two complex phasors. The angle
difference between the two phasors determines whether the fault
is internal or external to the protected zone. The fault types can be
classified by the modal fault detection index. The relaying scheme
can be applied to protect transposed and untransposed lines. The
proposed scheme also combines on-line parameter estimation to
assure protection scheme performance and to achieve adaptive
protection. Extensive EMTP simulation studies show that the
proposed scheme provides a fast relay response and high accuracy
in fault location under various system and fault conditions. The
studies verify that the response of the proposed relaying scheme is
unaffected by CT saturation and CCVT transients under internal
and external faults. The proposed method responds very well with
regard to dependability, security and sensitivity.
Subjects
數位保護
全球衛星定位系統
同步相量量測
器
器
輸電線保護
保護電驛
Publisher
臺北市：國立臺灣大學生物產業機電工程學系暨研究所
Type
report
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