scholarly journals Analysis of Ill‐conditioning of hybrid state estimators in the presence of PMU measurements

2021 ◽  
Author(s):  
Sanjeeb Kumar Mallik ◽  
Saikat Chakrabarti ◽  
Sri Niwas Singh
Keyword(s):  
Hybrid State ◽  
State Estimators ◽  
Ill Conditioning

scholarly journals Optimal utilisation of PMU measurements in power system hybrid state estimators

2019 ◽  
Vol 13 (21) ◽  
pp. 4978-4986 ◽  
Author(s):  
Anamika Dubey ◽  
Saikat Chakrabarti ◽  
Ankush Sharma ◽  
Vladimir Terzija
Keyword(s):  
Power System ◽  
Hybrid State ◽  
State Estimators

A Block Version of Orthogonal Rotations for Improving the Accuracy of Hybrid State Estimators

2020 ◽  
Vol 35 (6) ◽  
pp. 4432-4444
Author(s):  
Daniel Martins Bez ◽  
Antonio Simoes Costa ◽  
Larah Bruning Ascari ◽  
Edson Zanlorensi Junior
Keyword(s):  
Hybrid State ◽  
State Estimators ◽  
Block Version

Analysis of Hybrid State Estimators: Accuracy and Convergence of Estimator Formulations

2019 ◽  
Vol 34 (4) ◽  
pp. 2565-2576 ◽  
Author(s):  
Zhaoyang Jin ◽  
Peter Wall ◽  
Yushou Chen ◽  
James Yu ◽  
Saikat Chakrabarti ◽  
...  
Keyword(s):  
Hybrid State ◽  
State Estimators

scholarly journals A Synchrophasor Assisted Hybrid State Estimator

2016 ◽  
Vol 67 (2) ◽  
pp. 103-110
Author(s):  
Vedran Kirincic ◽  
Srdjan Skok ◽  
Dubravko Frankovic
Keyword(s):  
Measurement Errors ◽  
Recursive Algorithm ◽  
State Estimator ◽  
Final State ◽  
Hybrid State ◽  
State Estimators ◽  
System Part ◽  
Measurement Units ◽  
Improved Accuracy ◽  
The Given

Abstract The paper presents a Synchrophasor Assisted Hybrid State Estimator that utilizes the conventional SCADA measurements and the synchrophasors obtained from Phasor Measurement Units (PMUs). To take advantage of the high sampling frequency of the multiple sets of synchrophasors they are preprocessed in a recursive algorithm that provides the state estimate for the power system part observable by PMUs. The results are forwarded to an iterative procedure in which they are combined with SCADA measurements. The given solution was applied on the IEEE test systems with 14, 30 and 57 buses and its performance was compared with other state estimators. The filtering of measurement errors and convergence, while providing improved accuracy of the final state estimates of the developed methodology can be compared with other hybrid state estimators.

Hybrid state-space self-tuning control using dual-rate sampling

1991 ◽  
Vol 138 (1) ◽  
pp. 50 ◽  
Author(s):  
Leang S. Shieh ◽  
Xiao M. Zhao ◽  
John W. Sunkel
Keyword(s):  
State Space ◽  
Hybrid State ◽  
Self Tuning
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