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This paper discusses the impact of marked-based flexibility operation on distribution grids on both MV and LV level. Based on the gained experience in three research projects eBADGE, hybridVPP4DSO and IEA HPP Annex42, it is discussed how far market participation of flexibility resources in the distribution grid can cause grid congestions under consideration of current Austrian network planning practices...
This paper presents estimation strategies for voltage measurements developed to enhance the robustness of distributed voltage control in secondary substations in case of communication delays and failures. Different estimation concepts are described and benchmarked. The most promising concepts were implemented and validated in field tests in two low voltage grids for several months. Results from these...
Enabling a high hosting capacity of PV infeed in LV grids can be a great challenge for distribution system operators. To assure 100% PV infeed at any time the maximal PV infeed with the minimal load situation is used in conventional network planning. When looking at real grid situations, this worst case scenario only occurs rarely. This paper describes a probabilistic planning approach that increases...
This paper describes the impact of different voltage control strategies on low voltage grids with a high share of decentralized generation. These control strategies use the on-load-tap-change capability of new MV/LV-transformers as well as the capability of new PV inverters and other flexible devices to control active and reactive power. The control strategies were operated in field tests in three...
After the successful implementation of first smart grid solutions in the low voltage grids (like dynamic tap-changer switching or solar inverters' reactive and active power adaptation), the evaluation of their performance is of high interest. Due to the nature of the communication systems (e.g. narrow-band power-line communication), i.e. its highly varying message delay and potential packet loss,...
Intelligent control approaches for smart low voltage (LV) grids have to meet the future requirements caused by increasing penetration of distributed generation (DG) from renewable sources and new network participators like electric vehicles. To meet these technical requirements complex solutions have to be developed. Due to the fact that these solutions should be implemented in one of the most critical...
European low voltage grids host an increasing amount of energy from rooftop PV installations. Experience in Germany has shown that PV installations do not grow uniformly but with regional hot spots. Meanwhile it is widely agreed that low voltage grids should only be updated to accommodate some 90 % or less of available PV power in peak times in order to avoid extensive costs for grid reinforcement...
Intelligent control approaches for smart low voltage (LV) grids have to meet the future requirements caused by increasing penetration of decentralized generation (DG) from renewable sources and new network participators like electric vehicles. These technical requirements can be solved, but especially in LV networks it is necessary to consider the cost benefit ratio. This paper will therefore focus...
Power system analysis applications like PowerFactory make it possible to investigate research questions within a dedicated domain specific environment. With the increasing complexity in cyber-physical systems the need for coupling models or systems for simulation becomes eminent. By utilizing and extending existing interfacing mechanisms the pros and cons for different coupling approaches under different...
In the DG DemoNet Validation project a coordinated voltage controller was developed to actively integrate a high share of renewables into existing distribution systems. The impact of controlling the medium voltage transformer and the reactive power of distributed generation — based on the actual voltages of critical nodes — on voltage range and number of tap changer operations is analysed. Evaluation...
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