Redundancy and Observability Analysis of Conventional and PMU Measurements

London, João Bosco Augusto; Piereti, Saulo Augusto Ribeiro; Benedito, Raphael Augusto de Souza; Bretas, N.G.

doi:10.1109/tpwrs.2009.2021195

Cited by 41 publications

(34 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This can be done by means of special sensors referred to as synchrophasors or phasor measurement units (PMUs) [1]. To produce useful and relevant data, the PMUs have to be time-synchronized to the Universal Coordinated Time (UTC), i.e.…”

Section: Introductionmentioning

confidence: 99%

“…A key bus may be redundantly observed a few times from different paths for higher reliability. Indeed, the reliability of power system state estimation depends on measurement redundancy, which is crucial not only for system observability but also for bad data detection and identification [1]. Thus, measurement redundancy, at least for critical buses is necessary and should be included in the OPP problem.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Preserving observability in synchrophasors using Optimal Redundancy Criteria (ORC)

Vallakati

Mukherjee

Ranganathan

2015

2015 IEEE First International Conference on DC Microgrids (ICDCM)

View full text Add to dashboard Cite

This paper presents a linear programming based solution for an Optimal Placement of Phasor Measurement Units (PMU) problem (OPP) under contingency situations. With the increasing usage of synchrophasors or PMUs for smart grid monitoring and control, the problem of PMU placement has become a major concern due to high installation costs. This paper uses a Linear Programming (ILP) approach to find optimal solutions. This paper shows that performance of the LP constraints and formulation makes the approach very attractive for smaller utilities with limited budgets. This is investigated with and without zero injection cases in the CPLEX solver. This paper also proposes an index called the Optimal Redundancy Criteria (ORC) that assists utilities in providing redundant observability for critical buses in the system. The proposed approach yields optimal solutions for full and redundant observabilities within 15 milliseconds (ms) for test bed cases such as the IEEE 14, 30, 57, 118, and 300 bus systems, and a 208 bus Southern region Indian power grid (SRIPG).

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preserving observability in synchrophasors using Optimal Redundancy Criteria (ORC)

Vallakati

Mukherjee

Ranganathan

2015

2015 IEEE First International Conference on DC Microgrids (ICDCM)

View full text Add to dashboard Cite

show abstract

“…To improve the accuracy and reliability of the state estimation process, several studies have investigated the use of synchronized phasor measurements, obtained by Phasor Measurement Units (PMUs) [5], [6]. The PMU is a device able to measure the voltage phasor of the bus where the PMU is installed and the current phasors of all the lines connected with this bus.…”

Section: Introductionmentioning

confidence: 99%

Metering system planning for state estimation via evolutionary algorithm and H<sup>T</sup><inf>Δ</inf> matrix considering SCADA and PMU measurements

Bozz

Vigliassi

London

2014

2014 IEEE PES General Meeting | Conference &Amp; Exposition

View full text Add to dashboard Cite

Some years ago an efficient methodology for SCADA metering system planning was developed. The methodology enables the design of Reliable Metering Systems (RMSs) for state estimation purposes (i.e., observable metering systems free from critical measurements, critical sets and critical Remote Terminal Units), minimizing investment costs. It is based on Evolutionary Algorithms (EAs) and the analysis of the H ' ' matrix. This paper reports on the extension of this methodology for the incorporation of synchronized phasor measurements, which are provided by Phasor Measurement Units. The aim is to obtain an efficient methodology that enables the design of RMSs considering the existence of both non-synchronized SCADA measurements and synchronized phasor measurements, minimizing investment costs. To demonstrate the efficiency of the proposed methodology, some of several test results of its application in the IEEE 30-bus and 57-bus systems will be presented. Some results will be compared to those obtained by other methodologies.

show abstract

“…In the WMAS, an accurate and fast estimation of the lowfrequency oscillation parameters is a very important part in analyzing, controlling and operating a wide area power system. In general, the real-time synchronous parameters of the power system are measured by using synchrophasor technology [6][7][8][9]. The key elements of synchrophasor technology are the estimation technique of the lowfrequency oscillating parameters, i.e., the phasor, the frequency, and the damping factor.…”

Section: Introductionmentioning

confidence: 99%

Parameter Estimation Method of Low-Frequency Oscillating Signals Using Discrete Fourier Transforms

Choi¹,

Shim²,

Nam³

et al. 2012

Journal of Electrical Engineering and Technology

View full text Add to dashboard Cite

-This paper presents a DFT (Discrete Fourier Transform) based estimation algorithm for the parameters of a low-frequency oscillating signal. The proposed method estimates the parameters, i.e., the frequency, the damping factor, the mode amplitude, and the phase, by fitting a discrete Fourier spectrum with an exponentially damped cosine function. Parameter estimation algorithms that consider the spectrum leakage of the discrete Fourier spectrum are introduced. The multi-domain mode test functions are tested in order to verify the accuracy and efficiency of the proposed method. The results show that the proposed algorithms are highly applicable to the practical computation of low-frequency parameter estimations based on DFTs.

show abstract

Redundancy and Observability Analysis of Conventional and PMU Measurements

Cited by 41 publications

References 4 publications

Preserving observability in synchrophasors using Optimal Redundancy Criteria (ORC)

Preserving observability in synchrophasors using Optimal Redundancy Criteria (ORC)

Metering system planning for state estimation via evolutionary algorithm and H<sup>T</sup><inf>Δ</inf> matrix considering SCADA and PMU measurements

Parameter Estimation Method of Low-Frequency Oscillating Signals Using Discrete Fourier Transforms

Contact Info

Product

Resources

About

Redundancy and Observability Analysis of Conventional and PMU Measurements

Cited by 41 publications

References 4 publications

Preserving observability in synchrophasors using Optimal Redundancy Criteria (ORC)

Preserving observability in synchrophasors using Optimal Redundancy Criteria (ORC)

Metering system planning for state estimation via evolutionary algorithm and H<sup>T</sup><inf>&#x0394;</inf> matrix considering SCADA and PMU measurements

Parameter Estimation Method of Low-Frequency Oscillating Signals Using Discrete Fourier Transforms

Contact Info

Product

Resources

About

Metering system planning for state estimation via evolutionary algorithm and H<sup>T</sup><inf>Δ</inf> matrix considering SCADA and PMU measurements