Stability studies in low voltage networks with increasing integration of home energy systems in the building sector – Dynamic network simulation and control concepts for grid-interactive buildings

Tim Schlösser
E.ON Energy Research Center – RWTH Aachen
Institute for Automation of Complex Power Systems (ACS)
Section: Modelling and Simulation Interactive Infrastructures
Phone +49 241 / 80 49 750 –

Univ. Prof. Dr.-Ing. Antonello Monti
E.ON Energy Research Center – RWTH Aachen; Institute for Automation of Complex Power Systems

Short discription of the subject

Background and Motivation
The continuing increase of electrical energy generation in the building sector is according to the unpredictability of volatile renewable energy sources and the statistical consumer behaviour a major challenge to existing low-voltage systems. Due to the classical interpretation of these systems, this is considered insufficient and the likelihood of a threat to grid stability is increased. Grid-interactive buildings including systems engineering, such as heat pumps and combined heat and power plants, are structured as electric consumers and producers, which provide the ability to optimize the network management system. Against this background, investigations using dynamic network simulations for low voltage networks with increasing amount of grid-interactive buildings and their systems engineering are carried out. The focus lies on assessing the stability of low-voltage systems, as well as the development of control strategies for supply and load management.

Research Methods
Focus of research is the impact of the integration of renewable energy generation in the building stock and grid-interactive equipment technology on the stability of the electrical grid. Different types of low-voltage systems (rural, urban) have to be considered for a holistic assessment. Dynamic network simulation involves firstly the detailed simulation of the electrical network and its components. Additionally, the thermal and electrical consumer behaviour, which is linked due to the thermo-electric technologies, are considered. Network calculation programs, such as NEPLAN, components for dynamic investigation of energy systems RTDS (Real Time Digital Simulator) and multi-physical systems (PC cluster) are used.     A comprehensive investigation of grid-stability, dynamic processes for changes in load or supply as well as for troubleshooting in the electrical system or in control engineering studies is evaluated with these tools.

Expected Result
The aim of this research is the dynamic simulation-based study of low-voltage systems and the assessment of stability by increasing integration of home energy systems in the building sector. The solutions in the field of impact on electricity networks provide an important basis for optimized network planning, network development and network management. It will also support control engineering studies by showing the potential for efficient power system management. Herein, there are options of load shifting on the consumer side, control of electrical power generation to support the grid and in the clarification of errors. The possibility of decentralized load management is a sensible way to minimize the control intervention from higher voltage levels and therefore it is economical to provide a future benefit for consumers and network operators.

Short CV

Since 07.2012Research associate (Ph.D. Student); Institute for Automation of Complex Power Systems; E.ON Energy Research Center – RWTH Aachen
10.2005 – 04.2012Diploma studies; Electrical Engineering and Information Technology; Field of Electrical Power Engineering

Focus of interests and research


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