111 citations · 227 across the 14 of their papers we have counts for
15 papers
Lipschitz-Based Robustness Certification for Recurrent Neural Networks via Convex Relaxation
Paul Hamelbeck, Johannes Schiffer
Robustness certification against bounded input noise or adversarial perturbations is increasingly important for deployment recurrent neural networks (RNNs) in safety-critical contr…
A Predictive Operation Controller for an Electro-Thermal Microgrid Utilizing Variable Flow Temperatures
Max Rose, Christian A. Hans, Johannes Schiffer
We propose an optimal operation control strategy for an electro-thermal microgrid. Compared to existing work, our approach increases flexibility by operating the thermal network wi…
PMU-based dynamic state and parameter estimation for dynamic security assessment in power systems -- Ultimate boundedness in the presence of measurement noise
Nicolai Lorenz-Meyer, René Suchantke, Johannes Schiffer
Dynamic state and parameter estimation methods for dynamic security assessment in power systems are becoming increasingly important for system operators. Usually, the data used for…
Dynamic state and parameter estimation in multi-machine power systems - Experimental demonstration using real-world PMU-measurements
Nicolai Lorenz-Meyer, René Suchantke, Johannes Schiffer
Dynamic state and parameter estimation (DSE) plays a key role for reliably monitoring and operating future, power-electronics-dominated power systems. While DSE is a very active re…
Data-Driven Control for Linear Discrete-Time Delay Systems
Juan G. Rueda-Escobedo, Emilia Fridman, Johannes Schiffer
The increasing ease of obtaining and processing data together with the growth in system complexity has sparked the interest in moving from conventional model-based control design t…
A Globally Convergent State Observer for Multimachine Power Systems with Lossy Lines
Alexey Bobtsov, Romeo Ortega, Nikolay Nikolaev +1
We present the first solution to the problem of estimation of the state of multimachine power systems with lossy transmission lines. We consider the classical three-dimensional \fl…
State Observation of Power Systems Equipped with Phasor Measurement Units: The Case of Fourth Order Flux-Decay Model
Alexey Bobtsov, Romeo Ortega, Nikolay Nikolaev +2
The problem of effective use of Phasor Measurement Units (PMUs) to enhance power systems awareness and security is a topic of key interest. The central question to solve is how to…
Data-Driven Internal Model Control of Second-Order Discrete Volterra Systems
Juan G. Rueda-Escobedo, Johannes Schiffer
The increase in system complexity paired with a growing availability of operational data has motivated a change in the traditional control design paradigm. Instead of modeling the…
PMU-Based Decentralized Mixed Algebraic and Dynamic State Observation in Multi-Machine Power Systems
M. Nicolai L. Lorenz-Meyer, Alexey A. Bobtsov, Romeo Ortega +2
We propose a novel decentralized mixed algebraic and dynamic state observation method for multi-machine power systems with unknown inputs and equipped with Phasor Measurement Units…
Generalized Parameter Estimation-based Observers: Application to Power Systems and Chemical-Biological Reactors
Romeo Ortega, Alexey Bobtsov, Nikolay Nikolaev +2
In this paper we propose a new state observer design technique for nonlinear systems. It consists of an extension of the recently introduced parameter estimation-based observer, wh…
Online Estimation of Power System Inertia Using Dynamic Regressor Extension and Mixing
Johannes Schiffer, Petros Aristidou, Romeo Ortega
The increasing penetration of power-electronic-interfaced devices is expected to have a significant effect on the overall system inertia and a crucial impact on the system dynamics…
On the Existence and Long-Term Stability of Voltage Equilibria in Power Systems with Constant Power Loads
Alexey S. Matveev, Juan E. Machado, Romeo Ortega +2
Voltage instability is a major threat in power system operation. The growing presence of constant power loads significantly aggravates this issue, hence motivating the development…
A tool for stability and power sharing analysis of a generalized class of droop controllers for high-voltage direct-current transmission systems
Daniele Zonetti, Romeo Ortega, Johannes Schiffer
The problem of primary control of high-voltage direct current transmission systems is addressed in this paper, which contains four main contributions. First, to propose a new nonli…
Robustness of Distributed Averaging Control in Power Systems: Time Delays & Dynamic Communication Topology
Johannes Schiffer, Florian Dörfler, Emilia Fridman
Distributed averaging-based integral (DAI) controllers are becoming increasingly popular in power system applications. The literature has thus far primarily focused on disturbance…
A survey on modeling of microgrids - from fundamental physics to phasors and voltage sources
Johannes Schiffer, Daniele Zonetti, Romeo Ortega +3
Microgrids have been identified as key components of modern electrical systems to facilitate the integration of renewable distributed generation units. Their analysis and controlle…