A Reliable and Fast-decoupled Weighted Least Square State Estimation for Power Systems

Aravindhababu, P.; Neela, R.

doi:10.1080/15325000802084687

Cited by 11 publications

(9 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this work, PSO is implemented to find the optimal locations of PMUs through minimizing the following objective function: (24) The process will be continued until the maximum iteration and number of population reaches a prescribed value. Figure (1) shows the procedure of PSO technique.…”

Section: The Fitness Function (Objective Function)mentioning

confidence: 99%

See 1 more Smart Citation

An Efficienet Algorithm for Static State Estimation in Electric Power System

Hasan¹,

Al-Anbarri²

2019

JEASD

View full text Add to dashboard Cite

This paper presents an efficient static state estimator that is suitable for real time monitoring of the power system. The proposed algorithm includes a weighted least square (WLS) method based on rectangular coordinates system. A predictor-corrector iterative technique is used in solving the state estimator model which is described by a set of nonlinear equations relating measured quantities and the state variables. The proposed algorithm is enhanced by selecting the allocation the PMUs meters optimally by using Particle Swarm Optimization (PSO). The proposed algorithm is applied to the IEEE-14 bus and IEEE-30 bus test systems. The obtained results reveal the significant contribution of the proposed algorithm in optimal estimate of the static state in terms of number of iterations for convergence, execution time and accuracy.

show abstract

Section: The Fitness Function (Objective Function)mentioning

confidence: 99%

“…State estimation by using bilinear approach by introducing auxiliary state variables and auxiliary measurements were presented in [22,23]. A state estimator algorithm based on fast decoupled WLS was presented in [24]. Abbasi and Seifi [25] suggested a master-slave-splitting technique to estimate the state variables of global power system.…”

Section: Introductionmentioning

confidence: 99%

An Efficienet Algorithm for Static State Estimation in Electric Power System

Hasan¹,

Al-Anbarri²

2019

JEASD

View full text Add to dashboard Cite

show abstract

“…A modified weighted least absolute value (WLAV) with scaling and higher order derivative functions was presented by Jabr and Pal 5 . A fast decoupled SE, without involving any key assumptions, was outlined by Aravindha babu and Neela 6 . ASE scheme that relates the power flow with PMU measurements was suggested by Overbye et al 7 An iteratively reweighted least square procedure involving linear programming (LP) for SE of power systems was proposed by Dhadbanjan and Vanjari 8 .…”

Section: Introductionmentioning

confidence: 99%

A fast Broyden's approximation‐based weighted least square state estimation for power systems

Subramaniyan

Duraisamy

2020

Int J Numerical Modelling

View full text Add to dashboard Cite

State estimation (SE) serves as the heart of the energy management systems in providing online database by processing slow‐sampled supervisory control and data acquisition (SCADA) measurements. The recent development of fast sampled phasor measurement units (PMUs) provides real‐time measurements that enable tracking of the system state; however, the associated high initial cost does not allow to completely replace the existing SCADA measurements by PMUs. This article thus attempts to employ both the SCADA and PMU measurements, and suggests a new SE scheme comprising of a static SE module (SSEM) that estimates system state at defined time interval in the order of minutes using both the SCADA and PMU measurements, and a fast state reconstructing module for tracking the system state using PMU measurements and the calculated pseudo measurements in place of SCADA measurements. The proposed scheme employs Broyden's approach that avoids repeated formation and factorization of the Jacobian and gain matrices, respectively while iteratively solving the nonlinear simultaneous equations. It exhibits superior computational efficiency of the suggested scheme by presenting simulation results of four standard test systems.

show abstract

“…Using line flow and voltage magnitude measurements [11,12] suggested a reliable and fast decoupling SE which decouples the SE problem into two sub-problems, i.e. a WLAV-SE considering active power flow measurements, and another incorporates reactive power flow measurements and equations.…”

Section: Introductionmentioning

confidence: 99%

“…Several investigations [5][6][7][8][9][10][11][12][13] have been dedicated to emphasize the SE acceleration. In [5], the WLAV estimators were proposed for the SE problem.…”

Section: Introductionmentioning

confidence: 99%