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Open AccessFeature PaperArticle

Stochastic Optimization of PQ Powers at the Interface between Distribution and Transmission Grids

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Univ. Lille, Arts et Metiers ParisTech, Centrale Lille, HEI, EA 2697, L2EP—Laboratoire d’Electrotechnique et d’Electronique de Puissance, F-59000 Lille, France
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Univ. Lille, CNRS, Centrale Lille, UMR 9189, CRIStAL—Centre de Recherche en Informatique Signal et Automatique de Lille, F-59000 Lille, France
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Author to whom correspondence should be addressed.
Energies 2019, 12(21), 4057; https://doi.org/10.3390/en12214057
Received: 10 October 2019 / Revised: 21 October 2019 / Accepted: 22 October 2019 / Published: 24 October 2019
This paper addresses the volt-var control of distribution grids embedding many distributed generators (DGs). Specifically, it focuses on the compliance of powers to specified PQ diagrams at the high voltage/medium voltage (HV/MV) interface while the voltages remain well controlled. This is achieved using a two-stage optimization corresponding to two different classes of actuators. The tap position of capacitor banks is selected on a daily basis, given a stochastic model of the input powers prediction, which allows infrequent actuation and increases the device lifespan. In a second stage, a confidence level optimization problem allows to tune on an hourly basis the parameters of the DGs reactive power affine control laws. Results on a real-size grid show that the combined tuning of these actuators allows the ability to comply with European grid codes while the control effort remains reasonable. View Full-Text
Keywords: distribution grid; HV/MV interface; stochastic optimization; reactive power control; volt-var control distribution grid; HV/MV interface; stochastic optimization; reactive power control; volt-var control
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Buire, J.; Colas, F.; Dieulot, J.-Y.; Guillaud, X. Stochastic Optimization of PQ Powers at the Interface between Distribution and Transmission Grids. Energies 2019, 12, 4057.

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