TY - JOUR
T1 - A new approach to continuous latency compensation with adaptive phasor power oscillation damping controller (POD)
AU - Chaudhuri, Nilanjan Ray
AU - Ray, Swakshar
AU - Majumder, Rajat
AU - Chaudhuri, Balarko
N1 - Funding Information:
Manuscript received June 11, 2009; revised August 21, 2009. First published November 13, 2009; current version published April 21, 2010. This work was supported by the EPSRC UK under grant EESC P11121. Paper no. TPWRS-00444-2009.
PY - 2010/5
Y1 - 2010/5
N2 - Latency or delay in remote feedback signals can adversely affect the closed-loop damping performance. Accurate time-stamp information at both (PMU location and control center) ends offers a possibility to continuously compensate for time-varying latency. In this paper, an adaptive phasor power oscillation damping controller (APPOD) is proposed wherein the rotating coordinates for phasor extraction are adjusted to account for the change in phase caused due to the delay. The oscillatory component of the original signal is thus retrieved out of the delayed signal received at the control center. Unlike conventional phasor POD, which uses a fixed phase shift to generate damping control signal, an adaptive phase shift algorithm is used here to suit varying signal locations and operating conditions. Case studies confirm the effectiveness of the proposed technique, both in terms of robustness and handling continuously varying delays. A comparison with a conventional gain scheduled POD (CGPOD) and a Unified Smith Predictor (USP) approach is also presented.
AB - Latency or delay in remote feedback signals can adversely affect the closed-loop damping performance. Accurate time-stamp information at both (PMU location and control center) ends offers a possibility to continuously compensate for time-varying latency. In this paper, an adaptive phasor power oscillation damping controller (APPOD) is proposed wherein the rotating coordinates for phasor extraction are adjusted to account for the change in phase caused due to the delay. The oscillatory component of the original signal is thus retrieved out of the delayed signal received at the control center. Unlike conventional phasor POD, which uses a fixed phase shift to generate damping control signal, an adaptive phase shift algorithm is used here to suit varying signal locations and operating conditions. Case studies confirm the effectiveness of the proposed technique, both in terms of robustness and handling continuously varying delays. A comparison with a conventional gain scheduled POD (CGPOD) and a Unified Smith Predictor (USP) approach is also presented.
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U2 - 10.1109/TPWRS.2009.2031908
DO - 10.1109/TPWRS.2009.2031908
M3 - Article
AN - SCOPUS:77951666915
SN - 0885-8950
VL - 25
SP - 939
EP - 946
JO - IEEE Transactions on Power Systems
JF - IEEE Transactions on Power Systems
IS - 2
M1 - 5332251
ER -