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The Smart Storage Unit (SSU) is a centralized smart battery system, capable of storing approximately 230 kWh of electrical energy. Its objectives are the increase of self-consumption, reliability and flexibility, to reduce losses and to maximize the utilization of local infrastructure. First, a technical description of the SSU is given. Furthermore, this paper focuses on increasing reliability through...
The increasing penetration of Distributed Generation (DG) units connected to the distribution network, driven mainly by environmental reasons, gives the opportunity to consider islanded operation of electricity distribution grids. Grid disturbances at the transmission level can lead to power interruptions in extended areas. This paper examines the possibility to operate an area with a significant...
The increasing penetration of Distributed Generation (DG) units connected to the distribution network, driven mainly by environmental reasons, gives the opportunity to consider islanded operation of electricity distribution grids. Grid disturbances at the transmission level can lead to power interruptions in extended areas. This paper examines the possibility to operate an area with a significant...
The increasing penetration of Distributed Generation (DG) units connected to the distribution network, driven mainly by environmental reasons, gives the opportunity to explore a more flexible operation mode of electricity grids. Grid disturbances especially at the transmission level can lead to power interruptions in extended areas. This paper examines the possibility of an area with a significant...
Notwithstanding the positive environmental impact, the increasing penetration of Distributed Generation (DG) units connected to the distribution network raises new topics concerning the expected response of these during outages. Grid disturbances especially at the transmission level can cause the unwanted disconnection of large amounts of DG, leading to undesired power imbalances causing line overloadings...
Apart from the positive technical consequences, the increasing penetration of Distributed Generation (DG) units connected to the distribution network brings new requirements in the protection strategy. Grid disturbances at the transmission level can cause the unwanted disconnection of large amount of DG, leading to undesired power imbalances. This paper examines how transmission network faults can...
This paper presents a novel control strategy to operate a low-voltage (LV) micro-grid in grid connected operation mode as well as autonomous operation mode. Depending on the inverter output impedance which is mainly resistive due to the LV cables a proper control strategy based on an unbalanced resistive droop approach is developed. The control strategy is verified by simulating fast changes of power...
Apart from the positive technical consequences like reducing losses, the increasing penetration of distributed generation (DG) units connected to the distribution network, has lead to the increase of the short-circuit (sc) currents and the fault level. Therefore it is important to know the contribution of each unit. This paper presents the available analytical equations to calculate the short-circuit...
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