Study on The Novel Transient Bus Protection Based on Morphological Top-bottom-operator
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TLDR
A novel transient component bus protection based on mathematical morphology is presented in this paper, which takes the morphological max top-bottom- operator of current traveling wave to fast distinguish the bus internal fault from the external fault.Abstract:
A novel transient component bus protection based on mathematical morphology is presented in this paper, which takes the morphological max top-bottom- operator of current traveling wave to fast distinguish the bus internal fault from the external fault. The method is based on the principle that the high frequency component of transient traveling wave caused by bus external fault will be attenuated by the bus capacitance but the traveling wave caused by bus internal fault changes slightly. Simulation is carried out with the electromagnetic transient simulation software PSCAD/EMTDC, the result verifies the bus protection is reliable and accurate. The novel bus protection also can treat lightning failure or lightning disturbance happened on transmission lines as bus external fault, without malfunction.read more
Citations
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TL;DR: The proposed algorithm has high security and dependability in discrimination of external and internal faults with the ultra-fast operation and in the case of the existing two busbars in a substation layout, the proposed indices can discriminate between the faults of the two bus zones.
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References
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Single-Ended Transient-based Protection for EHV Transmission Lines Basic Theory
TL;DR: In this article, the authors apply frequency domain model of transmission system to analyze the frequency characteristics of transmission line, busbar and line trap, and propose the concept of line boundary.
A distributed bus protection using transient traveling wave power directions of transmission lines
TL;DR: In this article, a distributed bus protection is proposed to distinguish internal and external faults of the protected bus by comparing the power directions of transient traveling-waves of transmission lines using the wavelet transform.
Effect of lightning on protection based on travelling waves
TL;DR: In this paper, a lightning criterion using current component and wavelet transform is brought forward to distinguish whether fault takes place or not when lightning hits on transmission line, which can be fulfilled either by current itself or by fault component of current.
Study status and theories of protection for transmission lines based on travelling wave
TL;DR: In this paper, a background of the development of the travelling wave based relaying for transmission lines is introduced and its development at home and aboard is reviewed, and the advantages and disadvantages of various travelling wave-based relaying theories are analyzed.
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