NDLI: Study on digital comprehensive protection system based on double CPU for underground high-voltage distribution networks

Content Provider	IEEE Xplore Digital Library
Author	Liang Yilong Liu Bin
Copyright Year	2011
Description	Author affiliation: College of Electrical and Power Engineering, Taiyuan University of Technology, 030024, China (Liang Yilong) \|\| Department of Automation, Taiyuan Institute of Technology, 030008, China (Liu Bin)
Abstract	With the application of arc extinction coil compensation technology for underground HV distribution networks, the selectivity of leakage protection in current comprehensive protection system is affected heavily. On the basis of analyzing the failure law of leakage, the principle of leakage is proposed, which initiate in the zero sequence voltage and act for protection in accordance with the phase of fifth harmonic. At the same time the insulation monitoring, short-circuit, overload protection principles are expounded. In order to satisfy real-time and reliability requirements for the relay protection in HV distribution networks, there are onerous tasks for data acquisition, calculation, display, control, communication and so on. Therefore double CPU comprehensive protection system is designed, which combines DSP with microcontroller. Hardware structure & software block diagrams are introduced as well. Finally, the measuring results are given in this paper. Those results show that the protective system is good practice in stability and reliability.
Starting Page	242
Ending Page	245
File Size	132640
Page Count	4
File Format	PDF
ISBN	9781424487271
e-ISBN	9781424487288
DOI	10.1109/CSAE.2011.5952462
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-10
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Coils Insulation Power supplies Grounding Power cables Intrinsic safe communication interface Fifth harmonic Underground HV distribution networks Circuit faults Selective leakage protection Double CPU Monitoring
Content Type	Text
Resource Type	Article

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