CIM-based three-phase state estimation of distribution network

2011 ◽  
Author(s):  
LiJun Qin ◽  
Meng Li ◽  
Ying Wang ◽  
CuiJuan Hao ◽  
HuaWei Jin
Keyword(s):  
State Estimation ◽  
Phase State ◽  
Distribution Network ◽  
Three Phase ◽  
Estimation Of Distribution

scholarly journals Three-Phase State Estimation of a Low-Voltage Distribution Network with Kalman Filter

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7421
Author(s):  
Fabio Napolitano ◽  
Juan Diego Rios Penaloza ◽  
Fabio Tossani ◽  
Alberto Borghetti ◽  
Carlo Alberto Nucci
Keyword(s):  
Kalman Filter ◽  
State Estimation ◽  
Phase State ◽  
Low Voltage ◽  
Distribution Network ◽  
Estimation Algorithm ◽  
The State ◽  
Voltage Distribution ◽  
Smart Meters ◽  
Three Phase

The state estimation of distribution networks has long been considered a challenging task for the reduced availability of real-time measures with respect to the transmission network case. This issue is expected to be improved by the deployment of modern smart meters that can be polled at relatively short time intervals. On the other hand, the management of the information coming from many heterogeneous meters still poses major issues. If low-voltage distribution systems are of interest, a three-phase formulation should be employed for the state estimation due to the typical load imbalance. Moreover, smart meter data may not be perfectly synchronized. This paper presents the implementation of a three-phase state estimation algorithm of a real portion of a low-voltage distribution network with distributed generation equipped with smart meters. The paper compares the typical state estimation algorithm that implements the weighted least squares method with an algorithm based on an iterated Kalman filter. The influence of nonsynchronicity of measurements and of delays in communication and processing is analyzed for both approaches.

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.

scholarly journals Interval State Estimation of Distribution Network With Power Flow Constraint

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 40826-40835 ◽  
Author(s):  
Zhi Wu ◽  
Huiyu Zhan ◽  
Wei Gu ◽  
Shujiang Zheng ◽  
Bojiang Li
Keyword(s):  
State Estimation ◽  
Power Flow ◽  
Distribution Network ◽  
Estimation Of Distribution

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
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