Marco Pignati

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https://people.epfl.ch/marco.pignati?lang=fr

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PMU-based linear state estimation of Lausanne subtransmission network: Experimental validation

Asja Derviskadic, Mario Paolone, Marco Pignati, Paolo Romano, Lorenzo Zanni

The paper presents the implementation details and the experimental validation of a linear state estimator based on synchrophasor measurements in a real subtransmission network. The data are provided by 15 phasor measurement units (PMUs) installed in the 125-kV grid of the city of Lausanne, Switzerland. The PMU-based monitoring infrastructure, the telecommunication and the phasor data concentrator are described in detail. We compare the performance of two different state estimation methods, i.e., the linear weighted least squares and the least absolute value estimator, with a focus on the influence of the line parameter errors on the state estimates. We further analyze the latency contribution associated to each step of the measurement chain, in order to validate its appropriateness to serve time-critical power system applications.

2020

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Architecture and Experimental Validation of a Low-Latency Phasor Data Concentrator

Asja Derviskadic, Mario Paolone, Marco Pignati, Paolo Romano

The paper presents the design principles of a Phasor Data Concentrator (PDC) that implements both the absolute and relative time data pushing logics together with a third one that aims at minimizing the latency introduced by the PDC without increasing the data incompleteness, as suggested in the IEEE Guide C37.244-2013. The performance of the aforementioned logics are assessed and compared in terms of reliability, determinism and reduction of the overall latency in two real Phasor Measurement Unit (PMU) installations adopting different telecom infrastructures. The first one is based on optical fiber links that transmit synchrophasor data measured by 15 PMUs installed in the sub-transmission network of the city of Lausanne, Switzerland. The second one adopts a 4G LTE wireless infrastructure to support the data streaming of 10 PMUs installed in a distribution network supplying the city of Huissen, in the Netherlands. The experimental results show that the proposed logic is characterized by the lowest latency, whereas the absolute time logic better mitigates the synchrophasor data latency variations.

2018

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2018

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