Johannes Gärttner

Karlsruhe Institute of Technology | KIT · Institute of Information Systems and Marketing

The share of renewable power sources in the electricity generation mix has seen enormous growth in recent years. Generation from fluctuating renewable energy sources (Wind, Solar) has to be considered stochastic and not (fully) controllable. To align demand with volatile supply, balancing and storage capacities have to be increased. To avoid high c...

This paper investigates the economic potential of local PV generation at EV car parks under consideration of empirical driving profiles, variable electricity prices and individual PV generation patterns. Using a simulation framework and a mixed-integer linear program we examine the PV share which is utilized for EV charging and the corresponding ch...

The share of renewable power sources in the electricity generation mix has seen enormous growth in recent years. As renewable power generation cannot be (fully) controlled, the need for balancing capacities will increase. To avoid high storage costs, load flexibility can be exploited to better align demand with volatile supply. This can be operatio...

Since the beginning of the energy sector liberalization, the design of energy markets has become a prominent field of research. Markets nowadays facilitate efficient resource allocation in many fields of energy system operation, such as plant dispatch, control reserve provisioning, delimitation of related carbon emissions, grid congestion managemen...

Since the beginning of the energy sector liberalization, the design of energy markets has become a prominent field of research. Markets nowadays facilitate efficient resource allocation in many fields of energy system operation, such as plant dispatch, control reserve provisioning, delimitation of related carbon emissions, grid congestion managemen...

The increasing penetration of renewable generation in electricity markets as well as the rising number of electric vehicles pose new challenges for transmission grids. Additional demand and regionally clustered generation force system operators to consider costly expansion plans and employ expensive redispatch measures in the meantime. In this pape...

The changing topologies of electricity generation and the lagging expansion of transmission grids in Europe lead to a resurfacing of the debate over power market designs. This debate has been led as the "Nodal-Bilateral Debate" with proponents of a market with a central ISO on one side and a market based on decentralized contracts on the other side...

The transition to more sustainable energy generation challenges transmission system operators to include intermittent renewable generation as well as electric vehicles into the power system. Especially in uniform-price power markets, this results in the need for unpopular grid expansions to overcome grid congestion. We analyze the ability of the ex...

The energy transition from a formerly centralized, fossil-fuel based system towards a sustainable system based on a large share of renewable generation calls for a decentralization and regionalization of the electricity system. Local electricity markets (LEMs), on which prosumers and consumers can trade locally produced electricity, meet these requ...

Car-sharing is a precursor to the emerging class of “mobility services” leveraging modern technology to enable access to car-based mobility without the consumer owning the physical asset. Consequently, it plays an increasingly important role for urban mobility. Two-way station-based systems, where the customer picks up and returns a car at a single...

In this article, we investigate the potential for battery life prolongation through optimized charging under consideration of individual mobility requirements. Based on a comprehensive battery aging model we introduce a continuous quadratic programming model to derive battery life optimal charging (OPT). The strategy indicates when and how much to...

Electricity generation from renewable energy sources has seen significant growth in recent years. To improve grid integration of these volatile energy resources, demand side flexibility can be operationalized through intelligent scheduling of flexible electrical loads. Prior research has mainly focused on determining dispatch schedules for exogenou...

Generation from distributed renewable energy sources is constantly increasing. Due to its volatility, the integration of this non-controllable generation poses severe challenges to the current energy system. Thus, ensuring a reliable balance of energy generation and consumption becomes increasingly demanding. In our approach to tackle these challen...

Vor dem Hintergrund der Klimaerwärmung hat die Bundesregierung ehrgeizige Ziele für den Ausbau Erneuerbarer Energien und die Verbreitung von Elektrofahrzeugen definiert, um CO2-Emissionen zu reduzieren. Elektrofahrzeuge werden allerdings erst dann dazu beitragen dieses Ziel zu erreichen, wenn sie durch Erneuerbare Energien geladen werden. In dieser...

The share of renewable generation (RG) in the energy mix has seen constant growth in recent years. RG is volatile and not (fully) controllable. Consequently, the alignment of stochastic demand with supply, which is fundamental for ensuring grid stability, becomes more difficult. The utilization of demand side flexibility as well as RG portfolio des...