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Junqi Liu

Researcher at RWTH Aachen University

Publications -  38
Citations -  1186

Junqi Liu is an academic researcher from RWTH Aachen University. The author has contributed to research in topics: Electric power system & Phasor. The author has an hindex of 15, co-authored 30 publications receiving 1029 citations.

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Journal ArticleDOI

Trade-Offs in PMU Deployment for State Estimation in Active Distribution Grids

TL;DR: The authors study the meter placement problem for the measurement infrastructure of an active distribution network, where heterogeneous measurements provided by Phasor Measurement Units (PMUs) and other advanced measurement systems are used in addition to measurements typical of distribution networks.
Journal ArticleDOI

Adaptive load shedding based on combined frequency and voltage stability assessment using synchrophasor measurements

TL;DR: In this article, a centralized, adaptive load shedding algorithm, which uses both voltage and frequency information provided by phasor measurement units (PMUs), is proposed, and the main contribution of the new method is the consideration of reactive power together with active power in the load shedding strategy.
Journal ArticleDOI

A Fast and Accurate PMU Algorithm for P+M Class Measurement of Synchrophasor and Frequency

TL;DR: In this article, the authors 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 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.
Journal ArticleDOI

Optimal Meter Placement for Robust Measurement Systems in Active Distribution Grids

TL;DR: The Gaussian mixture model has been incorporated into the placement optimization by means of the so-called Gaussian component combination method and the occurrence of either loss of data or degradation of metrological performance of the measurement devices is also considered.
Proceedings ArticleDOI

PMU and smart metering deployment for state estimation in active distribution grids

TL;DR: In this article, the authors proposed a meter placement procedure that allows for an optimization of the metering infrastructure for distribution system state estimation satisfying given estimation error bounds, while keeping into account different accuracies and costs of Phasor Measurement Units (PMUs) and smart metering devices as well as different network configurations of the future active distribution grids.