2012 IEEE International Instrumentation and Measurement Technology Conference Proceedings, 2012
This paper proposes a modified version of the synchrophasor estimation algorithm which uses the n... more This paper proposes a modified version of the synchrophasor estimation algorithm which uses the non-orthogonal transform defined as a Taylor-Fourier Transform (TFT) and which is based on a Weighted Least Squares (WLS) approximation respect to a second order of Taylor model. The aim of the proposed changes is to improve the performance of the algorithm in presence of fast transient
IEEE Transactions on Instrumentation and Measurement, 2014
ABSTRACT The IEEE Standard C37.118.1 defines two performance classes, P and M, for phasor measure... more ABSTRACT The IEEE Standard C37.118.1 defines two performance classes, P and M, for phasor measurement units (PMUs), respectively for protection and monitoring oriented applications. The goal of this paper is to define an algorithm that allows the requirements of both classes to be met simultaneously, thus avoiding an a priori selection of either the fast response time of class P or the accuracy of the class M. The designed PMU consists of two digital channels that process in parallel the acquired samples with different algorithms: the first one allows accurate measurements of steady state signals, while the second one is better suited to follow the fast signal changes. Then, a detector identifies the possible presence of dynamic situations and selects the most appropriate output for the actual operating condition. The validation of the solution, performed by means of simulations in all the static and dynamic conditions defined in the standard, confirms that the method is able to comply with all the limits indicated for both classes for synchrophasor and frequency measurement. As for the rate of change of frequency, again the compliance to P-class is fully verified, while for the M-class the only exception is represented by the tests with out-of-band disturbances.
Abstract Synchrophasor measurement is becoming one of the key issue of power network monitoring. ... more Abstract Synchrophasor measurement is becoming one of the key issue of power network monitoring. The actual standard IEEE C37. 118 concentrates on phasor estimation requirements under steady state conditions. The standardization process is going towards a complete framework that keeps into account dynamic conditions. This paper focuses on algorithms proposed in literature for the estimation of dynamic phasors and analyzes their performance under several different conditions.
Abstract Different methods for the measurement of synchrophasors under dynamic conditions are ana... more Abstract Different methods for the measurement of synchrophasors under dynamic conditions are analyzed in this work. The focus is on the comparison of their behavior in the presence of different situations where it is no longer valid the assumption of steady state, on which the definitions provided by the international standard are based.
2012 IEEE International Instrumentation and Measurement Technology Conference Proceedings, 2012
This paper proposes a modified version of the synchrophasor estimation algorithm which uses the n... more This paper proposes a modified version of the synchrophasor estimation algorithm which uses the non-orthogonal transform defined as a Taylor-Fourier Transform (TFT) and which is based on a Weighted Least Squares (WLS) approximation respect to a second order of Taylor model. The aim of the proposed changes is to improve the performance of the algorithm in presence of fast transient
IEEE Transactions on Instrumentation and Measurement, 2014
ABSTRACT The IEEE Standard C37.118.1 defines two performance classes, P and M, for phasor measure... more ABSTRACT The IEEE Standard C37.118.1 defines two performance classes, P and M, for phasor measurement units (PMUs), respectively for protection and monitoring oriented applications. The goal of this paper is to define an algorithm that allows the requirements of both classes to be met simultaneously, thus avoiding an a priori selection of either the fast response time of class P or the accuracy of the class M. The designed PMU consists of two digital channels that process in parallel the acquired samples with different algorithms: the first one allows accurate measurements of steady state signals, while the second one is better suited to follow the fast signal changes. Then, a detector identifies the possible presence of dynamic situations and selects the most appropriate output for the actual operating condition. The validation of the solution, performed by means of simulations in all the static and dynamic conditions defined in the standard, confirms that the method is able to comply with all the limits indicated for both classes for synchrophasor and frequency measurement. As for the rate of change of frequency, again the compliance to P-class is fully verified, while for the M-class the only exception is represented by the tests with out-of-band disturbances.
Abstract Synchrophasor measurement is becoming one of the key issue of power network monitoring. ... more Abstract Synchrophasor measurement is becoming one of the key issue of power network monitoring. The actual standard IEEE C37. 118 concentrates on phasor estimation requirements under steady state conditions. The standardization process is going towards a complete framework that keeps into account dynamic conditions. This paper focuses on algorithms proposed in literature for the estimation of dynamic phasors and analyzes their performance under several different conditions.
Abstract Different methods for the measurement of synchrophasors under dynamic conditions are ana... more Abstract Different methods for the measurement of synchrophasors under dynamic conditions are analyzed in this work. The focus is on the comparison of their behavior in the presence of different situations where it is no longer valid the assumption of steady state, on which the definitions provided by the international standard are based.
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