Robin Preece
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View article: Modelling the impacts of large-scale heat electrification on interdependent gas and electricity networks: a probabilistic approach
Modelling the impacts of large-scale heat electrification on interdependent gas and electricity networks: a probabilistic approach Open
The growing interdependence between gas and electricity networks, coupled with the increasing adoption of heat electrification, presents significant challenges for energy system reliability and sustainability. This paper introduces a novel…
View article: Hardware measurement of MMC time delay and its impact on the stability of grid-connected MMC-HVDC systems
Hardware measurement of MMC time delay and its impact on the stability of grid-connected MMC-HVDC systems Open
Time delay in the feedback loop of power electronic converter control has the potential to induce poor response and even instability. In many published models of Modular Multilevel Converters High Voltage Direct Current (MMC-HVDC) systems …
View article: Optimal coordinated control of distributed energy storage systems using model predictive control
Optimal coordinated control of distributed energy storage systems using model predictive control Open
The rapid deployment of renewable generation has underscored the significant need for supplementary system services using Energy Storage Systems (ESS). These systems often feature small capacities and are diversely distributed across the n…
View article: Optimizing Network Expansion and Battery Storage to Mitigate Cascading Outages via Detailed System Failures Simulations
Optimizing Network Expansion and Battery Storage to Mitigate Cascading Outages via Detailed System Failures Simulations Open
Power networks have traditionally been designed to withstand credible outages, such as N-1 or N-2, often overlooking the complex interdependencies that can lead to cascading outages in modern systems. To address these evolving risks, plann…
View article: Stability Analysis of Grid-connected VSC-HVDC Systems with Compensated dq Domain Time Delay Models
Stability Analysis of Grid-connected VSC-HVDC Systems with Compensated dq Domain Time Delay Models Open
Voltage Source Converters-based High Voltage Direct Current (VSC-HVDC) transmission systems using Synchronous Reference Frame-Phase-Locked Loops (SRF-PLLs) have been widely studied for modern power systems. The PLL inevitably exhibits a la…
View article: Reduced order model of a flywheel energy storage system for efficient electromagnetic transient simulation
Reduced order model of a flywheel energy storage system for efficient electromagnetic transient simulation Open
In this paper, a reduced flywheel energy storage system (FESS) model for efficient EMT-Type simulation in developed in the PSCAD simulation environment. The developed model considers an average value converter model for the grid side conve…
View article: Effects of inertia distribution on regional frequency heterogeneity
Effects of inertia distribution on regional frequency heterogeneity Open
Heterogeneous inertia distribution can result in large regional frequency deviations and inter-area oscillations that exceed protection limits configured based on system-wide averaged performance. This paper examines how the spatial distri…
View article: Probabilistic assessment of overloaded lines in integrated gas and electricity networks with heat electrification
Probabilistic assessment of overloaded lines in integrated gas and electricity networks with heat electrification Open
This paper presents a probabilistic method for assessing overload probability of power lines and gas pipelines in integrated gas and electricity networks with the consideration of heat electrification. The proposed model fully considers th…
View article: Risk Assessment and Mitigation of Cascading Failures Using Critical Line Sensitivities
Risk Assessment and Mitigation of Cascading Failures Using Critical Line Sensitivities Open
Security concerns have been raised about cascading failure risks in evolving power grids. This paper reveals, for the first time, that the risk of cascading failures can be increased at low network demand levels when considering security-c…
View article: A Framework for Analyzing System Loadability With Multiple VSCs Using a Hybrid Model
A Framework for Analyzing System Loadability With Multiple VSCs Using a Hybrid Model Open
Due to the increasing number of power electronics-based devices in modern power systems, there are concerns about the impact of higher-frequency interactions on system stability. The typically-used algebraic representation of networks fail…
View article: Investigating small-disturbance stability in power systems with grid-following and grid-forming VSCs using hybrid modelling approaches
Investigating small-disturbance stability in power systems with grid-following and grid-forming VSCs using hybrid modelling approaches Open
The mass integration of power electronics-based devices is changing small-disturbance stability issues in power systems from primarily interactions between synchronous generators to include interactions between power electronic devices and…
View article: Risk assessment of cascading failures in power systems with increasing wind penetration
Risk assessment of cascading failures in power systems with increasing wind penetration Open
The ever-growing penetration of renewable based generation is leading to significant increases in the risk of cascading failures in low-inertia, and interconnection-rich, power systems. This paper proposes a framework for quantifying the r…
View article: Benefits and Challenges of Dynamic Modelling of Cascading Failures in Power Systems
Benefits and Challenges of Dynamic Modelling of Cascading Failures in Power Systems Open
Time-based dynamic models of cascading failures have been recognized as one of the most comprehensive methods of representing detailed cascading information and are often used for benchmarking and validation. This paper provides an overvie…
View article: Identifying Feasibility Region Boundaries in Power Systems With Multiple VSCs
Identifying Feasibility Region Boundaries in Power Systems With Multiple VSCs Open
It is anticipated that a large number of voltage source converters (VSCs) will be integrated into future power systems, which can potentially be detrimental to system stability. Previous work has utilized an impedance-based approach to ana…
View article: A machine learning approach for real‐time selection of preventive actions improving power network resilience
A machine learning approach for real‐time selection of preventive actions improving power network resilience Open
Power outages due to cascading failures which are triggered by extreme weather pose an increasing risk to modern societies and draw attention to an emerging need for power network resilience. Machine learning (ML) is used for a real‐time s…
View article: Improving system loadability with the consideration of multiple bifurcations
Improving system loadability with the consideration of multiple bifurcations Open
The introduction of large numbers of power electronic converters along with increasing load demand will create voltage stability issues in future power systems. Most present analysis methodologies neglect the non-linearities within these s…
View article: AC Cascading Failure Model for Resilience Analysis in Power Networks
AC Cascading Failure Model for Resilience Analysis in Power Networks Open
Cascading failures are one of the main mechanisms causing widespread blackouts of power networks. Models simulating the behavior of cascading failures are widely used in the literature to understand fault propagation and investigate effect…
View article: Assessment of critical parameters for artificial neural networks based short-term wind generation forecasting
Assessment of critical parameters for artificial neural networks based short-term wind generation forecasting Open
Participation of wind energy in the generation portfolio of power systems is increasing, making it more challenging for system operators to adequately maintain system security. It therefore becomes increasingly crucial to accurately predic…
View article: Evaluation of Suitability of Different Transient Stability Indices for Identification of Critical System States
Evaluation of Suitability of Different Transient Stability Indices for Identification of Critical System States Open
Power system stability indices are used as measures to evaluate and quantify the response of the system to external large disturbances. This paper provides a comparative analysis of established transient stability indices. The indices stud…