Fast and adaptive under frequency load shedding and restoration technique using rate of change of frequency to prevent blackouts

Atputharajah, Arulampalam and Saha, Tapan Kumar (2010). Fast and adaptive under frequency load shedding and restoration technique using rate of change of frequency to prevent blackouts. In: IEEE PES General Meeting. 2010 IEEE Power and Energy Society General Meeting, Minneapolis, Minnesota, USA, (1-8). 25-29 July 2010. doi:10.1109/PES.2010.5589415

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Author Atputharajah, Arulampalam
Saha, Tapan Kumar
Title of paper Fast and adaptive under frequency load shedding and restoration technique using rate of change of frequency to prevent blackouts
Conference name 2010 IEEE Power and Energy Society General Meeting
Conference location Minneapolis, Minnesota, USA
Conference dates 25-29 July 2010
Proceedings title IEEE PES General Meeting
Journal name IEEE PES General Meeting, PES 2010
Place of Publication Piscataway, N.J., U.S.A.
Publisher IEEE
Publication Year 2010
Sub-type Fully published paper
DOI 10.1109/PES.2010.5589415
ISBN 9781424483570
9781424465491
ISSN 1944-9925
Issue Article number 5589415
Start page 1
End page 8
Total pages 8
Collection year 2011
Language eng
Abstract/Summary This paper explains a fast acting Under Frequency Load Shedding and restoration scheme. This load shedding technique has an added advantage of selecting the amount of load which is to be dropped at a particular frequency threshold. The amount of load dropping is selected based on the rate of change of the frequency. Automatic restoration of loads is discussed with engaging a command signal from the system control centre. On/Off control of the power factor correction capacitor is also explained based on the magnitude of its terminal voltage. A three phase voltage vector Phase Lock Loop (PLL) is developed in EMTDC/PSCAD environment to measure the frequency of the power system. The PLL is tuned together with a filter to smooth the frequency measurement. This PLL measures the frequency online and based on phase angle deviation. Therefore it has a fast initial response. A load shedding factor is selected based on the rate of change of frequency between the specified thresholds. According to the load shedding factor the amount of load is selected. Load shedding and automatic load restoration operations are triggered accordingly when the frequency passes its relevant thresholds. The proposed distributed load shedding and restoration control technique was tested for IEEE 12 bus system at two different grid substations. The simulation results confirmed the fast, proper and smooth operations of the proposed technique.
Subjects 0906 Electrical and Electronic Engineering
E1
Keyword Phase Lock Loop
UFLS
Blackout
Frequency measurement
Instability
Rate of change of frequency
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Presented in Session: Power System Dynamic Performance Committee Paper Forum

 
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Created: Wed, 13 Oct 2010, 12:28:58 EST by Maria Campbell on behalf of School of Information Technol and Elec Engineering