Modeling quadrature booster in power system state estimation in rectangular coordinate system

Okoń, Tomasz; Wilkosz, Kazimierz

doi:10.1109/ciem.2017.8120841

Cited by 2 publications

(10 citation statements)

References 12 publications

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“…Paper [10] describes the power system state estimation assuming the use of a phase shifter model consisting of an ideal series voltage source and an ideal shunt current source. The use of two real voltage sources, i.e., a serial source and a shunt source in the phase shifter model for the state estimation purposes is described in [11][12][13][14][15]. Papers [11][12][13] deal with the state estimation for a power system with a quadrature booster.…”

Section: Introduction 1considered Problem and The Current State Of The Research Fieldmentioning

confidence: 99%

Impact of Quadrature Booster on Power-System State Estimation in Polar Coordinates

Okoń

Wilkosz

2021

Energies

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The paper concerns the estimation of the state of a power system in which there is a phase shifter called a quadrature booster. The aim of the paper is a comparative analysis of two different cases including the quadrature booster in the state estimation. In the first case, the quadrature booster is represented by a model consisting of two real voltage sources, one in series with a power line and the other in a shunt branch. In the second case, in the power system model, the real branch with the quadrature booster is represented as off at the end where the considered quadrature booster is actually installed. The state estimation is assumed to be carried out in the polar coordinate system. The properties of the state estimation are characterized by: the number of iterations in the calculation process, the index of conditioning of the matrix of coefficients in the equations to be solved (cond(G)), and ratio Je/Jm, which is a measure of the accuracy of the estimation. Using IEEE 14-bus test system, investigations are carried out in such a way as to cover the entire state space of the power system as possible. In the investigations, Monte Carlo experiments are carried out for each of the considered cases of the state estimation. Each of these cases is also analyzed from the point of view of the assumed definition of the state estimation. Investigations show that in the first of the previously described cases, the state estimation is more accurate, but there are more iterations in the calculations and worse conditioning of the estimation process. The comparative analysis also shows that, the accuracy of the results obtained in each of the considered cases is practically independent of the coordinate system in which the estimation calculations are performed. Taking into account the number of iterations in the estimation process and index cond(G), it can be concluded that the implementation of each of the above-mentioned estimation cases in the rectangular coordinate system is more reasonable.

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Section: Introduction 1considered Problem and The Current State Of The Research Fieldmentioning

confidence: 99%

Impact of Quadrature Booster on Power-System State Estimation in Polar Coordinates

Okoń

Wilkosz

2021

Energies

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“…There is relatively small number of papers presenting the problem of evaluation of properties of SE realized for PS with PhS [6], [7]. In [6], [7], the following indices characterizing properties of SE are considered: the number of iterations in PSSE calculation, the conditionality of the solved equations and accuracy of estimation. In [6], it is assumed that PhS is modelled as ideal transformer with a complex tap ratio in series with two-port π circuit which represents transformer losses.…”

Section: Introductionmentioning

confidence: 99%

“…PSSE is considered in the polar and rectangular coordinate systems. [7] is devoted to one of the type of PhSs, which is a quadrature booster. In [7], the results of investigations of PSSE in the rectangular coordinate system are presented.…”

Section: Introductionmentioning

confidence: 99%

“…[7] is devoted to one of the type of PhSs, which is a quadrature booster. In [7], the results of investigations of PSSE in the rectangular coordinate system are presented. In [7], significance of specific information on the quadrature booster from the point of view of properties of PSSE is investigated.…”

Section: Introductionmentioning

confidence: 99%

“…This paper contains the results of a next part of the investigations of the authors to be focused on properties of SE realized for PS with the symmetrical PhS. One takes into account such indices characterizing properties of SE as in [6], [7]. In this paper, PSSE is considered in the rectangular and polar coordinate systems.…”

Section: Introductionmentioning

confidence: 99%

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Impact of Symmetrical Phase Shifter on Power-System State Estimation

Okoń¹,

Wilkosz²

2018

ElAEE

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The paper deals with Power System State Estimation (PSSE) that plays essential role in modern dispatcher centres. The aim of the paper is to present results of original investigations on change of properties of PSSE when a symmetrical phase shifter is installed in a Power System (PS). The mentioned phase shifter is one of the types of phase shifters. Such the phase shifter is installed in the Polish Power System. In the paper, the following indices characterizing properties of PSSE are considered: the number of iterations in PSSE calculation, the conditionality of the solved equations and accuracy of estimation. The investigations are made using the IEEE 14-bus test system. The properties of PSSE are analysed when there is the phase shifter and when there is not such the device in PS for the polar and rectangular coordinate systems. The investigations are so organized to take into account possibly all space of states of PS. Results of the investigations show that there is noticeable change of the properties of PSSE as an effect of installation of the phase shifter in PS. In the paper, also such the cases are indicated, in which those changes are the smallest.

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Modeling quadrature booster in power system state estimation in rectangular coordinate system

Cited by 2 publications

References 12 publications

Impact of Quadrature Booster on Power-System State Estimation in Polar Coordinates

Impact of Quadrature Booster on Power-System State Estimation in Polar Coordinates

Impact of Symmetrical Phase Shifter on Power-System State Estimation

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