Publications by Lorenzo Zanni | EPFL Graph Search

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

Sidi-Rachid Cherkaoui, Mario Paolone, Paolo Romano, Marco Pignati, Lorenzo Zanni, Asja Derviskadic, Ali Abur

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 12 ...

Elsevier2020

Design and Experimental Validation of an LTE-Based Synchrophasor Network in a Medium Voltage Distribution Grid

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

We present and experimentally validate in a real-scale medium voltage (MV) grid a synchrophasor network that exploits the availability of a public 4G LTE communication infrastructure. An 18 buses, 10 kV feeder located in Huissen, The Netherlands, has been ...

Power Systems Computation Conference2018

Fault Detection and Faulted Line Identification in Active Distribution Networks Using Synchrophasors-based Real-Time State Estimation

Sidi-Rachid Cherkaoui, Mario Paolone, Paolo Romano, Marco Pignati, Lorenzo Zanni

We intend to prove that PMU-based state estimation processes for active distribution networks exhibit unique time determinism and refresh rate that make them suitable to satisfy the time-critical requirements of protections as well as the accuracy requirem ...

Institute of Electrical and Electronics Engineers2017

Power-System State Estimation based on PMUs : Static and Dynamic Approaches - from Theory to Real Implementation

Lorenzo Zanni

An increasing number of phasor measurement units (PMUs) are being deployed in power systems in order to enhance the situational awareness and, in the near future, we expect that many networks will be extensively equipped with PMUs. These devices provide ac ...

EPFL2017

Method and System for Fault Detection and Faulted Line Identification in Power Systems using Synchrophasors-Based Real-Time State Estimation

Mario Paolone, Paolo Romano, Marco Pignati, Lorenzo Zanni

A method for a faulted line identification in a power network, including, at a generic time-instant, solving a plurality of parallel phasor measurement units based real-time state estimators, the state estimators having among each other different and augme ...

2017

A Prediction-Error Covariance Estimator for Adaptive Kalman Filtering in Step-Varying Processes: Application to Power-System State Estimation

Sidi-Rachid Cherkaoui, Jean-Yves Le Boudec, Mario Paolone, Lorenzo Zanni

In this paper, we present a new method for the estimation of the prediction-error covariances of a Kalman filter (KF), which is suitable for step-varying processes. The method uses a series of past innovations (i.e., the difference between the upcoming mea ...

Institute of Electrical and Electronics Engineers2017

Performance Assessment of Linear State Estimators Using Synchrophasor Measurements

Jean-Yves Le Boudec, Mario Paolone, Styliani Sarri, Miroslav Popovic, Lorenzo Zanni

This paper aims to assess the performance of linear state estimation (SE) processes of power systems relying on synchrophasor measurements. The performance assessment is conducted with respect to two different families of SE algorithms, i.e., static ones r ...

Institute of Electrical and Electronics Engineers2016

Architecture and characterization of a calibrator for PMUs operating in power distribution systems

Mario Paolone, Daniele Colangelo, Paolo Romano, Marco Pignati, Lorenzo Zanni, Jean-Pierre Braun

In recent years, the Phasor Measurement Unit (PMU) technology is rapidly evolving towards the potential deployment also in power distribution systems (DSs). In general, this specific field of applications requires PMUs whose accuracy levels are beyond thos ...

IEEE2015

Real-Time State Estimation of the EPFL-Campus Medium-Voltage Grid by Using PMUs

Sidi-Rachid Cherkaoui, Jean-Yves Le Boudec, Mario Paolone, Teklemariam Tsegay Tesfay, Dan-Cristian Tomozei, Styliani Sarri, Paolo Romano, Miroslav Popovic, Marco Pignati, Lorenzo Zanni, Sergio Barreto Andrade, Maaz Mashood Mohiuddin, German Dario Flores Ponce

We describe the real-time monitoring infrastructure of the smart-grid pilot on the EPFL campus. We experimentally validate the concept of a real-time state-estimation for a 20 kV active distribution network. We designed and put into operation the whole inf ...

2015

Impact of synchrophasor measurement types and uncertainties on the accuracy of distribution system linear state estimators

Sidi-Rachid Cherkaoui, Mario Paolone, Daniele Colangelo, Lorenzo Zanni

The paper aims at assessing the effects of combined voltage and/or current synchrophasor measurements, and their associated uncertainties, on the accuracy of state estimators adopted in distribution systems. Such an assessment is first carried out with res ...

IEEE2015

A Hardware-in-the-Loop test platform for the performance assessment of a PMU-based Real-Time State Estimator for Active Distribution Networks

Mario Paolone, Styliani Sarri, Paolo Romano, Marco Pignati, Lorenzo Zanni

The paper describes the development of a Hardware- in-the-Loop (HIL) test platform for the performance assessment of a PMU-based sub-second linear Real-Time State Estimator (RTSE) for Active Distribution Networks (ADNs). The estimator relies on the availab ...

IEEE2015

Probabilistic assessment of the process-noise covariance matrix of discrete Kalman filter state estimation of active distribution networks

Sidi-Rachid Cherkaoui, Mario Paolone, Styliani Sarri, Marco Pignati, Lorenzo Zanni

The accuracy of state estimators using the Kalman Filter (KF) is largely influenced by the measurement and the process noise covariance matrices. The former can be directly inferred from the available measurement devices whilst the latter needs to be asses ...

IEEE2014

A pre-estimation filtering process of bad data for linear power systems state estimators using PMUs

Sidi-Rachid Cherkaoui, Jean-Yves Le Boudec, Mario Paolone, Styliani Sarri, Marco Pignati, Lorenzo Zanni

The paper proposes a specific algorithm for the pre-estimation filtering of bad data (BD) in PMU-based power systems linear State Estimators (SEs). The approach is framed in the context of the so-called real-time SEs that take advantage of the high measure ...

Wroclaw University of Technology2014

A Hardware-in-the-Loop Test Platform for the Real-Time State Estimation of Active Distribution Networks using Phasor Measurement Units

Sidi-Rachid Cherkaoui, Mario Paolone, Styliani Sarri, Paolo Romano, Marco Pignati, Lorenzo Zanni

The paper describes the development and the performance assessment of a Hardware-in-the-Loop (HIL) test platform built as a proof-of-concept of a sub-second State Estimator (SE) of Active Distribution Networks (ADNs). The SE relies on the availability of d ...

Cigré - Conseil International des Grands Réseaux Électriques2013