NDLI: Adaptive loss of field protection based on phasor measurements

Content Provider	IEEE Xplore Digital Library
Author	Tianshu Bi Jiayin Sui Hao Yu Qixun Yang
Copyright Year	2011
Description	Author affiliation: Key Lab of Power System Protection and Dynamic Monitoring & Control under Ministry of Education, North China Electric Power University, Beijing 102206, P. R. China (Tianshu Bi; Jiayin Sui; Hao Yu; Qixun Yang)
Abstract	Loss of field protection is of great importance for the security of large-scale generators. With the development of large-scale generators and corresponding loss of field protection, the complicated structure leads to the high possibility of loss of field faults. According to the statistical data, more than sixty percentages of the synchronous generator faults are the excitation system faults, which might cause loss of load, tie-line tripping, instability, collapse and etc. Therefore, it is crucial to identify loss of field as early as possible and take countermeasures. In loss of field protection, the impedance boundary criterion of steady state stability limit is widely used to distinguish loss of field and normal condition. However, the steady state stability limit circle is affected by the system operating modes, which might result in mis-operation of the relay. In this paper, an approach for on-line identifying system equivalent impedance is presented based on PMU measurements. The steady state stability limit circle can be adaptively fit for operating modes. The computer simulation results demonstrate that the proposed method works well.
Starting Page	1
Ending Page	4
File Size	800391
Page Count	4
File Format	PDF
ISBN	9781457710001
ISSN	19449925
e-ISBN	9781457710025
e-ISBN	9781457710018
DOI	10.1109/PES.2011.6039170
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-07-24
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Impedance Steady-state Generators Power system stability Stability criteria steady state stability limit generator loss of field protection parameter identification
Content Type	Text
Resource Type	Article

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