Harmonic state estimation: a method for remote harmonic assessment in a deregulated utility network

Matair, S.S.; Watson, N.R.; Wong, Kit Po; Pham, Van‐Long; Arrillaga, J.

doi:10.1109/drpt.2000.855636

Cited by 33 publications

(17 citation statements)

References 4 publications

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“…This mathematical approach has already been used for the state estimation of other power quality disturbances [13]- [16]. In particular, the expression (1) is used for the estimation of voltage sags in [9] where the system equations are obtained by means of an analytical method.…”

Section: Formulationmentioning

confidence: 99%

“…In this approach, the measurement noise E in (1) will be initially neglected [13]. The rest of the aforementioned terms of (1) will be explained with more detail in the following section.…”

Section: Formulationmentioning

confidence: 99%

“…For such problems, the SVD technique can provide a particular solution of quadratic minimum norm. This methodology has previously been proposed for the estimation of other power quality disturbances [13]- [16].…”

Section: Solution Of the System Equationsmentioning

confidence: 99%

“…In comparison to [9] and [11], in this approach the equations are straightly determined according to the number of fault positions selected. In addition, the method proposed here to find the solution is Singular Value Decomposition, a technique that has already been used for similar problems regarding other power quality disturbances [13]- [16] and that presents advantageous characteristics with respect to IPL and GA. One of these advantages is that, contrary to ILP and GA, SVD is not an iterative method and, thus, it is not exposed to convergence problems and it always provides a solution, whatever the size and type of the network. In terms of computing time consumption, the solution by means of SVD is also very beneficial with V almost negligible computation time compared to GA and, specially, to ILP.…”

Section: Introductionmentioning

confidence: 99%

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SVD Applied to Voltage Sag State Estimation

Hernàndez

Espinosa-Juárez

Castro

et al. 2013

IEEE Trans. Power Delivery

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Abstract-The method presented in this paper addresses the problem of voltage sag state estimation (VSSE). The problem consists in estimating the voltage sags frequency at non-monitored buses from the number of sags measured at monitored sites. Usually, due to limitations on the number of available voltage sag monitors, this is an underdetermined problem. In this approach, the mathematical formulation presented is based on the fault positions concept and is solved by means of the Singular Value Decomposition (SVD) technique. The proposed estimation method has been validated by using the IEEE 118 test system and the results obtained have been very satisfactory.Index Terms-voltage sags (dips), power quality monitoring, power system, Power Quality. I. INTRODUCTIONOLTAGE sags (also known as voltage dips) are a frequent power quality disturbance that can cause failure or malfunctioning to very common devices used in industrial and tertiary sectors. This disturbance, as with other power quality problems, must be approached from a compatibility point of view that requires characterizing the equipment sensitivity as well as the power system behavior. This paper relies on this second aspect.In order to describe the voltage sags performance in the power system, a method must be established that can provide representative values of the expected number and characteristics of voltage sags at system buses. To quantify the system behavior, a great emphasis has been placed recently on the use of different quality indices. Some of these indices are defined at a site level (for a specific point of the supply system), but there are others defined at a system level (for the whole system) [1]- [4]. For assessing site indices, monitoring the power supply at the site of interest can directly provide the information to evaluate the index. However, in order to calculate voltage sag indices of the whole system, ideally the monitoring of all sites should be required. Clearly, such a monitoring program is not economically justifiable.This work has been financed by the Ministerio de Ciencia e Innovación (MICINN), Spain, under project ENE2010-17459 (CON) A. Hernández, R. M. de Castro and M. Izzeddine are with the

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Section: Formulationmentioning

confidence: 99%

“…In this approach, the measurement noise E in (1) will be initially neglected [13]. The rest of the aforementioned terms of (1) will be explained with more detail in the following section.…”

Section: Formulationmentioning

confidence: 99%

Section: Solution Of the System Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

SVD Applied to Voltage Sag State Estimation

Hernàndez

Espinosa-Juárez

Castro

et al. 2013

IEEE Trans. Power Delivery

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“…Harmonic state estimation technique uses few synchronized harmonic measurement data as input to find the complete harmonic information for the whole network [8][9][10] . A framework of HSE can be found in [11] .…”

Section: Harmonic State Estimationmentioning

confidence: 99%

A New Method for Optimal Harmonic Meter Placement

Ketabi¹,

Hosseini²

2008

American J. of Applied Sciences

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Abstract:In this research, a new method based on Singular Value Decomposition (SVD) is proposed to solve the problem of optimal placement of meters for static estimation of harmonic sources in a power system. Also, the Binary Genetic Algorithm (BGA) is used to solve the problem of optimization. IEEE 14-bus test system is provided to validate the measurement placement algorithm. It has been observed that the quality of estimation is improved and the Number of Observable Variable (NOV) is increased. Moreover, the BGA-based meter placement strategy yields the same solution as obtained from the complete enumeration technique but in shorter time.

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Independent Component Analysis for Harmonic Studies

Ribeiro

2009

Time‐Varying Waveform Distortions in Power Systems

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Harmonic state estimation: a method for remote harmonic assessment in a deregulated utility network

Cited by 33 publications

References 4 publications

SVD Applied to Voltage Sag State Estimation

SVD Applied to Voltage Sag State Estimation

A New Method for Optimal Harmonic Meter Placement

Independent Component Analysis for Harmonic Studies

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