Voltage Stability Monitoring From a Transmission Bus PMU

This paper examines the problem of monitoring long-term voltage instability from a phasor measurement units installed at any transmission bus. It is shown that the well-known impedance matching condition on a radially connected load bus, as well as the local identification of voltage emergency situa...

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Bibliographic Details
Published in:IEEE transactions on power systems 2017-07, Vol.32 (4), p.3266-3274
Main Authors: Vournas, Costas D., Lambrou, Charalambos, Mandoulidis, Panagiotis
Format: Article
Language:English
Subjects:
Data buses
Electric potential
Emergencies
Feeding
Filtration
Fourier analysis
Fourier transforms
Impedance
Impedance matching
Indexes
Instability detection
Loss measurement
maximum power transfer
Monitoring
Noise prediction
Noise reduction
PMUs
Power system stability
real-time monitoring
Stability
Stability criteria
Voltage measurement
Voltage stability
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Summary:This paper examines the problem of monitoring long-term voltage instability from a phasor measurement units installed at any transmission bus. It is shown that the well-known impedance matching condition on a radially connected load bus, as well as the local identification of voltage emergency situations (LIVES) method based on load tap changing transformers can be generalized into a New LIVES Index suitable for any transmission bus feeding a weak area of a system. Results on an IEEE voltage stability test system validate the dependability and security of the new index for the early detection of voltage instability. Moving average, as well as a new filtering method based on short-time Fourier transform are employed to reduce the effect of noise and short-term transients.
ISSN:0885-8950
1558-0679
DOI:10.1109/TPWRS.2016.2629495