Grants and Contracts Details
Description
Project Summary
Objective: Prompt and accurate location of faults in a transmission system can accelerate
system restoration, reduce outage time and improve the system reliability. Diverse transmission
line fault location algorithms have been proposed in the past depending on measurements
available. Existing algorithms usually require measurements captured from buses of a faulted
line. This proposal intends to investigate possible fault location approaches for transmission
lines utilizing sparse voltage and/or current measurements from buses and branches that may
be distant from the faulted line. Both single-circuit and double-circuit lines will be considered.
Since meters may be capable of obtaining voltage and current phasors or magnitudes only, we
will explore possibilities for fault location employing phasors or magnitudes alone such as
voltage sags at sparse buses. Both synchronized and unsynchronized measurements will be
exploited. Especially data from Phasor Measurement Units (PMU) will be fully taken advantage
of.
Intellectual Merit: This research project intends to investigate the appropriate estimation
theories for transmission line fault location, aiming at making fundamental contributions to the
areas of power system monitoring, protection and fault analysis. The proposed research would
result in approaches for reliably estimating the fault location utilizing very sparse measurements.
Accurate estimate of the fault location will greatly reduce the outage time and significantly
enhance the system reliability. Specifically, the efforts will focus on the following tasks:
1. Investigate appropriate methodology for locating transmission line faults utilizing sparse
voltage and/or current measurements, which could be synchronized or unsynchronized
2. Develop fault location algorithms for both single-circuit and double-circuit lines
3. Develop fault location methods by exploiting voltage and/or current magnitude
4. Derive efficient approach for building the bus impedance matrix with addition of the fictitious
bus at the fault point, which can significantly facilitate short circuit studies
Broader Impacts: This work will have broader impacts in several areas. First, the developed
fault location approach would be able to accurately pinpoint the fault location by making the
most of available sparse measurements, thus greatly improving the reliability of the power
system, reducing the costs associated with the outage, and enhancing the welfare of the
society. Second, the proposed method has the potential to be utilized for online protection
purposes, and this could considerably improve distance protection accuracy employing local
data. Third, results of this project will be utilized in the classroom to enrich the curriculum. The
research results will be assimilated into the power system protection course the PI is developing
at the University of Kentucky. The underrepresented students, especially women, African
Americans and those from Appalachia will be encouraged and recruited to work on the project
to give them more opportunities and increase their confidence in pursuing a bachelor, master or
doctoral degree. Fourth, the project results will be promptly and broadly disseminated through
PI's webpage, technical publication and presentations.
Status | Finished |
---|---|
Effective start/end date | 8/1/08 → 7/31/11 |
Funding
- National Science Foundation: $248,002.00
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