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9 results on '"Baltensperger, Daniel"'

1. Optimal and Coordinated Voltage Control: Case Study on a 132 kV Norwegian Grid Subsystem

Author

de Brito, Hugo Rodrigues, Baltensperger, Daniel Simon, and Uhlen, Kjetil Obstfelder

Subjects
Electrical Engineering and Systems Science - Systems and Control
Abstract

This work presents a framework for dynamic performance assessment of the higher layers in the hierarchical voltage regulation scheme, with case studies applied to specific areas of the Norwegian grid. Unlike the primary (PVR) level, the secondary (SVR) and tertiary (TVR) levels are not tuned to a single device at a time, handling instead several reactive power resources available within a control zone including generator units, static VAr compensators and others. Proper SVR-TVR coordination for realistic transmission systems is a challenging topic at the core of many ongoing discussions in voltage control literature. Special focus is placed on practical considerations from the system operator perspective, since this research is also aimed at simplifying daily control centre routines. Dynamic simulation results concern a 21-bus equivalent of a 132 kV network model that accurately represents a Norwegian grid subsystem. Case studies address daily grid operation with real-life load demand and wind power generation profiles, showing that the proposed strategy is effective not only to minimize total active power losses as much as possible within system-wide limitations, but also to maintain adequate voltage profiles and reactive power flows. Findings pertaining to this work showcase the benefits of applying hierarchical voltage regulation layers as an asset to day-to-day control center management of a realistic transmission network., Comment: 11 pages, 8 figures, CIGRE Symposium 2025

Published
2025

8. Scaling version of Kundur’s two-areas system for electromechanical oscillations representation

Author

Baltensperger, Daniel, Dobrowolski, Jean, Obusevs, Artjoms, Segundo Sevilla, Felix Rafael, Korba, Petr, Baltensperger, Daniel, Dobrowolski, Jean, Obusevs, Artjoms, Segundo Sevilla, Felix Rafael, and Korba, Petr

Abstract

​© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works., In this paper, the problem of real implementation of a transmission grid was addressed. In today's modern society, electricity is the most important form of energy for industry and society. A reliable and stable electrical power system is therefore essential. The growing amount of renewable energy sources leads to wheeling electrical power over long distances and to the growth in power electronics-based generation. Both affect the behavior of the electrical power system. The objective of this paper is the development of a scaled version of the Kundur's two areas system in order to implement it in a real laboratory. Additionally, this setup allows to change the rotational inertia and analyze all terminal quantities with phasor measurement units. The control structure of this island grid should reflect the reality as close as possible. All this together enables to study dynamic phenomena with a real small power system. With this laboratory implementation electromechanical swings such as inter-area oscillations after disconnecting a tie-line, changing loads and generation or tripping a synchronous machine can be shown.

Published
2020

9. Optimal integration of battery energy storage systems and control of active power curtailment for distribution generation

Author

Buechi, Alexander, Segundo Sevilla, Felix Rafael, Korba, Petr, and Baltensperger, Daniel

Subjects
Optimization, Energy storage, 621.04: Energietechnik, Active power curtailment, Distribution systems, 620: Ingenieurwesen
Abstract

Power flows exceeding the thermal capacity on power system lines and severe rise on bus voltages are a potential problem in the future distribution grids where development of photovoltaic (PV) installations is expected. This problem could cause damage on components such as transformers and distribution lines provoking triggering the system protections that would eventually lead to system failures. The economic and environmental implications related to reinforcing of the existing network, make this option not the immediate solution for implementation. Installation of battery energy storage systems (BESS) and control of active power curtailment (APC) would be another option to phase the upcoming problems. In this paper a forecast for the year 2035 in a real residential area in Switzerland was investigated, where large amount of PV panels are expected to be installed. This project investigates different solutions based on BESS and APC to deal with the inevitable increase of power flow in the network. The solutions presented here, prevent the overload in a distribution system transformer and avoid excess power flows on the lines. For a given set of demand and PV production curves, simulations in Matlab were performed and computations of optimal power flows were calculated. The solutions explored on this work consider economical aspects such as discounted cash flow method that finds the optimal size of BESS installed. Results also show that combining BESS with curtailment is the most viable solution.

Published
2017

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