19 citations · 47 across the 15 of their papers we have counts for
26 papers
TRACE: A Reproducible Benchmark for Electricity Price Forecasting with Official Operational Text
Xinyi Yi, Zhangdie Yuan, Moy Yuan +1
Electricity price forecasting (EPF) supports scheduling, bidding, and risk management in electricity markets, yet existing benchmarks focus mainly on numerical inputs, leaving the…
Control of AC-AC interlinking converters for multi-grids
Jeremy Watson, Ioannis Lestas
This paper considers the control of AC-AC inter-linking converters (ILCs) in a multi-grid network. We overview the control schemes in the literature and propose a passivity framewo…
Inverse Optimal Control and Passivity-Based Design for Converter-Based Microgrids
Liam Hallinan, Jeremy D. Watson, Ioannis Lestas
Passivity-based approaches have been suggested as a solution to the problem of decentralised control design in many multi-agent network control problems due to the plug- and-play f…
Convergence Rate Bounds for the Mirror Descent Method: IQCs, Popov Criterion and Bregman Divergence
Mengmou Li, Khaled Laib, Takeshi Hatanaka +1
This paper presents a comprehensive convergence analysis for the mirror descent (MD) method, a widely used algorithm in convex optimization. The key feature of this algorithm is th…
On the synchronization of the Kuramoto-type model of oscillators with lossy couplings
Yemi Ojo, Khaled Laib, Ioannis Lestas
We consider the problem of synchronization of coupled oscillators in a Kuramoto-type model with lossy couplings. Kuramoto models have been used to gain insight on the stability of…
Distributed Optimal Secondary Frequency Control in Power Networks with Delay Independent Stability
Mengmou Li, Jeremy Watson, Ioannis Lestas
Distributed secondary frequency control for power systems, is a problem that has been extensively studied in the literature, and one of its key features is that an additional commu…
Convergence Rate Bounds for the Mirror Descent Method: IQCs and the Bregman Divergence
Mengmou Li, Khaled Laib, Ioannis Lestas
This paper is concerned with convergence analysis for the mirror descent (MD) method, a well-known algorithm in convex optimization. An analysis framework via integral quadratic co…
Identifiability in Dynamic Acyclic Networks with Partial Excitations and Measurements
Xiaodong Cheng, Shengling Shi, Ioannis Lestas +1
This paper deals with dynamic networks in which the causality relations between the vertex signals are represented by linear time-invariant transfer functions (modules). Considerin…
Parallel Feedforward Compensation for Output Synchronization: Fully Distributed Control and Indefinite Laplacian
Mengmou Li, Ioannis Lestas, Li Qiu
This work is associated with the use of parallel feedforward compensators (PFCs) for the problem of output synchronization over heterogeneous agents and the benefits this approach…
A Distributed Scheme for Voltage and Frequency Control and Power Sharing in Inverter Based Microgrids
Yemi Ojo, Jeremy D. Watson, Khaled Laib +1
Grid-forming inverter-based autonomous microgrids present new operational challenges as the stabilizing rotational inertia of synchronous machines is absent. The design of efficien…
Decentralized Stability Conditions for DC Microgrids: Beyond Passivity Approaches
Khaled Laib, Jeremy Watson, Yemi Ojo +1
We consider the problem of ensuring stability in a DC microgrid by means of decentralized conditions. Such conditions are derived which are formulated as input-output properties of…
A Necessary Condition for Network Identifiability with Partial Excitation and Measurement
Xiaodong Cheng, Shengling Shi, Ioannis Lestas +1
This paper considers dynamic networks where vertices and edges represent manifest signals and causal dependencies among the signals, respectively. We address the problem of how to…
A scalable control design for grid-forming inverters in microgrids
Jeremy Watson, Yemi Ojo, Khaled Laib +1
Microgrids are increasingly recognized as a key technology for the integration of distributed energy resources into the power network, allowing local clusters of load and distribut…
A Review of Reduced-Order Models for Microgrids: Simplifications vs Accuracy
Yemi Ojo, Jeremy Watson, Ioannis Lestas
Inverter-based microgrids are an important technology for sustainable electrical power systems and typically use droop-controlled grid-forming inverters to interface distributed en…
Frequency regulation with thermostatically controlled loads: aggregation of dynamics and synchronization
Andreas Kasis, Ioannis Lestas
Thermostatically controlled loads (TCLs) can provide ancillary services to the power network by aiding existing frequency control mechanisms. TCLs are, however, characterized by an…
Primary frequency regulation in power grids with on-off loads: chattering, limit cycles and convergence to optimality
Andreas Kasis, Nima Monshizadeh, Ioannis Lestas
Load side participation can provide valuable support to the power network in case of urgencies. On many occasions, loads are naturally represented by on and off states. However, th…
Frequency and voltage regulation in hybrid AC/DC networks
Jeremy D. Watson, Ioannis Lestas
Hybrid AC/DC networks are a key technology for future electrical power systems, due to the increasing number of converter-based loads and distributed energy resources. In this pape…
A system reference frame approach for stability analysis and control of power grids
Chrysovalantis Spanias, Ioannis Lestas
During the last decades, significant advances have been made in the area of power system stability and control. Nevertheless, when this analysis is carried out by means of decentra…
A distributed scheme for secondary frequency control with stability guarantees and optimal power allocation
Andreas Kasis, Nima Monshizadeh, Ioannis Lestas
We consider the problem of distributed secondary frequency regulation in power networks such that stability and an optimal power allocation are attained. This is a problem that has…
Secant and Popov-like Conditions in Power Network Stability
Nima Monshizadeh, Ioannis Lestas
The problem of decentralized frequency control in power networks has received an increasing attention in recent years due to its significance in modern power systems and smart grid…
Secondary frequency control with on-off load side participation in power networks
Andreas Kasis, Nima Monshizadeh, Ioannis Lestas
We study the problem of decentralized secondary frequency regulation in power networks where ancillary services are provided via on-off load-side participation. We initially consid…
Stability and instability in saddle point dynamics Part II: The subgradient method
Thomas Holding, Ioannis Lestas
In part I we considered the problem of convergence to a saddle point of a concave-convex function via gradient dynamics and an exact characterization was given to their asymptotic…
Stability and instability in saddle point dynamics -- Part I
Thomas Holding, Ioannis Lestas
We consider the problem of convergence to a saddle point of a concave-convex function via gradient dynamics. Since first introduced by Arrow, Hurwicz and Uzawa in [1] such dynamics…
Stability and optimality of distributed secondary frequency control schemes in power networks
Andreas Kasis, Nima Monshizadeh, Eoin Devane +1
We present a systematic method for designing distributed generation and demand control schemes for secondary frequency regulation in power networks such that stability and an econo…