Effects of load imbalance and system asymmetry on three-phase state estimation

2006 ◽  
Author(s):  
M.C. de Almeida ◽  
E.N. Asada ◽  
A.V. Garcia
Keyword(s):  
State Estimation ◽  
Phase State ◽  
Load Imbalance ◽  
Three Phase

scholarly journals Full-Observable Three-Phase State Estimation Algorithm Applied to Electric Distribution Grids

Energies ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1327 ◽  
Author(s):  
Thiago Soares ◽  
Ubiratan Bezerra ◽  
Maria Tostes
Keyword(s):  
State Estimation ◽  
Real Time ◽  
Distribution Systems ◽  
Phase State ◽  
Reactive Power ◽  
Estimation Algorithm ◽  
Load Flow ◽  
Electrical Network ◽  
The Real ◽  
Three Phase

This paper proposes the development of a three-phase state estimation algorithm, which ensures complete observability for the electric network and a low investment cost for application in typical electric power distribution systems, which usually exhibit low levels of supervision facilities and measurement redundancy. Using the customers´ energy bills to calculate average demands, a three-phase load flow algorithm is run to generate pseudo-measurements of voltage magnitudes, active and reactive power injections, as well as current injections which are used to ensure the electrical network is full-observable, even with measurements available at only one point, the substation-feeder coupling point. The estimation process begins with a load flow solution for the customers´ average demand and uses an adjustment mechanism to track the real-time operating state to calculate the pseudo-measurements successively. Besides estimating the real-time operation state the proposed methodology also generates nontechnical losses estimation for each operation state. The effectiveness of the state estimation procedure is demonstrated by simulation results obtained for the IEEE 13-bus test network and for a real urban feeder.

Three-phase state estimation in the medium-voltage network with aggregated smart meter data

2018 ◽  
Vol 98 ◽  
pp. 463-473 ◽  
Author(s):  
F. Ni ◽  
P.H. Nguyen ◽  
J.F.G. Cobben ◽  
H.E. Van den Brom ◽  
D. Zhao
Keyword(s):  
State Estimation ◽  
Phase State ◽  
Smart Meter ◽  
Medium Voltage ◽  
Three Phase

A new method for redundancy analysis of measurements applied to three-phase state estimation

2009 ◽  
Vol 79 (1) ◽  
pp. 234-238
Author(s):  
Madson C. de Almeida ◽  
Eduardo N. Asada ◽  
Ariovaldo V. Garcia
Keyword(s):  
State Estimation ◽  
Redundancy Analysis ◽  
Phase State ◽  
New Method ◽  
Three Phase

Linear three-phase state estimation for LV grids using pseudo-measurements based on approximate power distributions

2017 ◽  
Vol 2017 (1) ◽  
pp. 1871-1874 ◽  
Author(s):  
Robert Brandalik ◽  
Dominik Waeresch ◽  
Wolfram H. Wellssow ◽  
Jiali Tu
Keyword(s):  
State Estimation ◽  
Phase State ◽  
Three Phase ◽  
Approximate Power
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