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19 results on '"Abildgaard, Hans"'

4. Dynamic stability assessment of the large offshore wind power plant at Kriegers Flak.

Author

Glasdam, Rasmus Bærholm, Akhmatov, Vladislav, Dall, Laurids, Abildgaard, Hans, and Johansson, Hjortur

Subjects
OFFSHORE wind power plants, ELECTRIC power distribution grids, LOW voltage systems, ELECTRIC power transmission, ELECTRIC substations
Abstract

The Kriegers Flak Combined Grid Solution (KF CGS) is a hybrid-asset project in the Baltic Sea combining the grid-connection of the already established offshore wind power plants (OWPP) Baltic 1 (48.3 MW) and Baltic 2 (288 MW) to Germany and the under commissioning Kriegers Flak A (KFA, 200 MW)) and Kriegers Flak B (KFB, 400 MW) to Denmark with an offshore interconnector between the two countries. The interconnector utilizes the existed and added HVAC assets and a HVDC Back-to-Back Converter Station (BtB, 400 MW) with the Voltage-Source Converter (VSC) technology at the German shoreline. In contrast to common radial connections of the offshore wind power, the Danish grid-connection section will be a 220 kV meshed offshore grid (MOG) and have two gridconnection substations in the Danish transmission grid. This presentation deals with a dynamic stability assessment of the Danish transmission grid with establishment of 600 MW OWPP at Kriegers Flak. [ABSTRACT FROM AUTHOR]

Published
2019

8. Electricity for Road Transport, Flexible Power Systems and Wind Power

Author

Nielsen, Lars Henrik, Ravn, Hans, Meibom, Peter, Juul, Nina, Hedegaard, Karsten, Larsen, Helge V., Jørgensen, Kaj, Larsen, Esben, Horstmann, Jørgen Peter Frederik, Nørgård, Per Bromand, Bavnhøj Hansen, Anders, Pedersen, Jens, Kipp, Nicolai Anders, and Abildgaard, Hans

Subjects
Risø-R-1804, Risø-R-1804(EN)
Abstract

The aim of the project is to analyse the potential synergistic interplay that may arise between the power sector and the transport sector, if parts of the road transport energy needs are based on electricity via the utilisation of plug-in hybrid electric vehicles and pure electric vehicles. The project focuses on the technical elements in the chain that comprises: 1: The electric vehicle status, potentials and expected development. Electric batteries are in focus in this part of the analysis. 2: Analysis of plug-in hybrid electric vehicle interacting with a local grid. 3: Analysis of grid-vehicle connection systems including technical regulation options and analysis of needs for standardisation. 4: Setting up scenarios covering potential developments for utilizing electric drive trains in road transport. Period: Up to year 2030. 5: Analysis of capacity constraints in the electricity grid (transmission and distribution) as consequence of increasing electricity demand, and new flexible consumption patterns from segments in the transport sector, and as consequence of increasing capacity on wind power in the system. 6: Setting up and analysis of combined scenarios covering both the heat and power system and the transport sector.

Published
2011

12. Multi-Stage Optimization-Based Automatic Voltage Control Systems Considering Wind Power Forecasting Errors.

Author

Qin, Nan, Bak, Claus Leth, Abildgaard, Hans, and Chen, Zhe

Subjects
VOLTAGE regulators, WIND power, VECTOR error-correction models, VOLTAGE control, ELECTRIC transformers, NONLINEAR programming
Abstract

This paper proposes an automatic voltage control (AVC) system for power systems with limited continuous voltage control capability. The objective is to minimize the operational cost over a period, which consists of the power loss in the grid, the shunt switching cost, the transformer tap change cost, and the generator reactive power output cost. The problem is formulated in a multi-stage optimal reactive power flow (MORPF) framework, solved by the nonlinear programming techniques via a rolling process. The voltage uncertainty caused by wind power forecasting errors is considered in the optimal voltage/var dispatch by including a security margin in the voltage magnitude constraints. The robustness of the MORPF solution considering the voltage security margin is therefore improved. A platform is built for the offline investigations, employing the measurement data from the Danish national electricity control center, where study cases based on the western Danish power system demonstrate the superiority of the proposed AVC system in term of the cost minimization. Monte Carlo simulations are carried out to verify the proposed method on the robustness improvements. [ABSTRACT FROM AUTHOR]

Published
2017
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