A5052114200- Optimal Power Flow Distribution
- Microgrid Control and Optimization
- Electric Power System Optimization
- Smart Grid Energy Management
- HVDC Systems and Fault Protection
- Power System Optimization and Stability
- Power System Reliability and Maintenance
- Smart Grid Security and Resilience
- Wireless Power Transfer Systems
- Islanding Detection in Power Systems
- Frequency Control in Power Systems
- High-Voltage Power Transmission Systems
- Power Systems and Renewable Energy
- Economic theories and models
- Energy Harvesting in Wireless Networks
- Economic Theory and Policy
- Integrated Energy Systems Optimization
University of Kassel
2023
Fraunhofer Institute for Energy Economics and Energy System Technology
2019-2023
Fraunhofer Institute for Wind Energy Systems
2016-2018
The growing importance of renewable generation connected to distribution grids requires an increased coordination between transmission system operators (TSOs) and (DSOs) for reactive power management. This work proposes a practical effective interaction method based on sequential optimizations evaluate the flexibility potential networks dispatch them along with traditional synchronous generators, keeping minimum information exchange. A modular optimal flow (OPF) tool featuring...
In this work a multi-objective model predictive control for reactive power management in transmission connected distribution grids with high share of wind is presented. The proposed utilizes capabilities farms and tap-changer positions order to improve grid operation. Control signals namely set-points are smoothed over the forecast horizon. Further possible optimization objectives loss reduction, voltage profile smoothing complying exchange limits grid. A mixed-integer non-linear optimal...
This work presents an optimal reactive power management strategy for the operation of a transmission connected distribution grid with high share wind power. Main control objective is minimizing exchange overlaying grid. For this purpose, mixed integer non-linear flow (MINLP-OPF) problem formulated utilizing capabilities farms and transformer tap-changer positions whilst respecting voltage limitations. Loss minimization flat profile are possible secondary sequential optimization objectives....
Electrical power system operators (SOs) are free to realize grid operations according their own strategies. However, because resulting flows also depend on the actions of neighboring SOs, appropriate coordination is needed improve states from an overall perspective and individual SO perspective. In this paper, a new method presented that preserves data integrity SOs independent operation grids. This compared with non-coordinated local control another sequential has been identified as most...
With presence of large number distributed generation in the grid, system is imposed higher power fluctuations. Therefore, innovative control schemes should be provided future systems to maintain voltage an acceptable level. Moreover, reactive supply planned shifted from controlled bulk plants other sources. To this end, a use case developed under framework INTERPLAN project - Integrated operation planning tool towards Pan-European network. The aims present suitable functions order improve...
The article at hand gives an overview of a newly developed method and tool to flexibly efficiently remediate different kinds congestion in the power grid. presented approach consists three main steps: Building network model, identifying technical factors influencing congestion, formulating solving optimization problem by changing active set points plants. Within approaches for technically economically optimized redispatch are presented. paper focuses on development solution considering both,...
Distributed optimization methods promise to coordinate power system operators improve the overall grid operation. This paper analyzes and extends existing distributed for reactive dispatch of multiple transmission (TSOs) distribution (DSOs). For smart operations, provision energy resources (DERs), voltage magnitude setpoints plants transformer tap positions are optimized by mixed-integer nonlinear programming (MINLP). The compared let (SOs) optimize operate autonomously preserve their...
The study at hand describes the state of art regulatory framework for managing distribution system operator (DSO)/transmission (TSO) interface including information about available flexibility data and access rights different grid operators. It a possible future procedure to manage this using software tools support coordination performing analysis providing active as well reactive power several TSO–DSO interconnection points. proposed gives short overview two optimisation approaches/software...
In this paper, demand-side management (DSM) is performed through demand response aggregators (DRAs) in an uncertain environment within zonal price market framework. The proposed scheme aims to allow cross-border electricity trading and optimize interconnections usage as well obtain optimum DR volume from the perspective of Market Coupling Operator (MCO). consists several markets Nominated Electricity Operators (NEMO) who run their day-ahead balancing internally communicate information MCO...
Power system restoration takes place where power systems experience a blackout and might be splitted into several islands with limited number of black start units. The main challenge the process is to keep both frequency voltage within allowable limits while restoring network through energizing lines transformers as well load pickup. pickup scheme determined by specific conditions fulfilled which are in particular lowest nadir rate change. In traditional restoration, these variables function...
Ongoing changes in electrical energy systems and increasing possibilities to control power flows increase volatility as well flexibility therefore complexity of their operation. Hence, for flow control, system optimization, efficient integration operation planning currently are researched. Especially grid operation, reproducible robust solutions needed which can be provided by mathematical optimizations. This work describes a novel approach flexibly efficiently integrate different series...
The so-called short-term voltage stability is typical of nonlinear problems arising in dynamic performance electric power systems. This paper reports a simulation result on load margin for the IEEE 9-bus system connected to multi-terminal DC based voltage-source converter (VSC). shows that introduction AC control VSC increases under step change system, thereby showing clear benefit enhancing without harnessing system.
Reactive power management plays a crucial role in ensuring the reliable and efficient operation of systems. With growing integration decentralized renewable energy resources, reactive has become more complex due to intermittent nature sources output. This paper highlights status potential presence high distributed shares. The at hand builds short version currently set up report within IEA PVPS Task 14. Therein, an overview regulations across selected countries, including grid codes...
This paper presents an approach for calculating optimized operating conditions in hybrid AC/DC systems while considering constraints on the small-signal dynamics. The implementation is based a closed form power flow optimization steady-state and damping of eigenvalues calculated from linearized system model. utilizes eigenvalue parametric sensitivities to calculate next time steps' points. modelling calculation their are modular that facilitates scalability larger systems. An AMPL Matlab...