PhD students and Postdocs of the Control and Power Group present their research projects

Every week, one speaker (selected randomly two weeks in advance) will give a 15min talk followed by a 10min discussion. The talks might be conference contributions, initial research ideas of talks for the Late Stage Review or Early Stage Assessment.

After the talk, the participants will have coffee and cake/biscuits together in Faraday Cage. This provides an excellent opportunity to get in touch with the participants and have a follow-up discussion with the speaker. Everyone is invited, with interest in the following topics spanning control and power:

  • control theory and applications
  • power electronics
  • power systems and energy
  • smart grids

Currently, the audience consists of MSc students, PhD students and Postdocs of the Control and Power group.

Contact: Kaiwen Chen (Control talks) [kaiwen.chen16@imperial.ac.uk], Olayinka Ayo (Power talks) [o.ayo17@imperial.ac.uk]

This week's talk

SpeakerCaspar Collins

When: Wed 12/12/2018 14:00-14:30

Where: Room EEE 1109B

TitleComparative Analysis of an MV Neutral Point Clamped AC-CHB Converter with DC Fault Ride-through Capability

AbstractThe AC side cascaded H-bridge converter with a two-level main bridge has previously been proposed as a fault tolerant converter for HVDC. This paper explores the benefits of replacing the two-level bridge with a neutral point clamped three-level (NPC) bridge for MVDC applications and defines the optimum operating conditions for this case. By modifying the topology to include an NPC main bridge, the peak stack voltage during normal operation is decreased considerably which results in a 58% reduction in the required number of sub-modules (SM), thereby significantly increasing efficiency. However, this sacrifices the fault ride-through capability as the stacks are no longer able to support the AC voltage and thus two new SM topologies are proposed. The proposed topologies function as single full-bridges with two capacitors in parallel during normal operation. Under fault conditions, the SMs divide into two series connected full-bridges to enable DC fault ride-through. Reverse-blocking IGCTs or ultra-fast mechanical switches are used to bypass the IGBTs which are unused in normal operation and therefore the topology maintains a high efficiency. Simulation results are shown, and the proposed topologies are compared with more conventional designs in terms of efficiency, energy storage requirement and device count.

Past talks

2018-2019

  • 05/12/2018 Kaiwen Chen - "I&I adaptive control for systems with varying parameters"
  • 28/11/2018 Xiaohong Dong - "Planning of EV fast charging stations on a round freeway"
  • 21/11/2018 Yue Yu - "Global transportation electrification and relative charging infrastructure"
  • 07/11/2018 Anastasis Georgiou - "Robust fault tolerant Model Predictive Control and for high order system"

2017-2018

  • 12 Sep 2018 Willem Leterme - "Modeling for AC/DC Converters with Controlled DC Fault Blocking Capability"
  • 25 Jul 2018 Joan Marc Rodriguez - "Implementation of Model Predictive Control Techniques in Power Electronic Voltage Source Converters"
  • 18 Jul 2018 Evelyn Heylen - "Reliability-based electricity consumption: Individualized reliability levels in probabilistic short-term reliability management of power systems"
  • 11 Jul 2018 Dawei Qiu - "Investigating the impact of demand flexibility on electricity retailers"
  • 20 Jun 2018 Kaiwen Chen - "Adaptive Control of Linear Systems with Time-Varying Parameters"
  • 13 Jun 2018 Jochen Cremer - "Game over, no more Jenga! Machine Learning based Security Assessment & Secure Operation of the Power System"
  • 06 Jun 2018 Tiago Rodrigues - "Computationally Efficient Risk-averse Energy Storage Investment for Renewables Coordination"
  • 31 May 2018 Xi Zhang - “Economic Assessment of Alternative Heat Decarbonisation Strategies through Coordinated Operation with Electricity System”
  • 21 May 2018 Georgios Anagnostou - "Identifying Unknown Dynamics in Power Systems"
  • 15 May 2018 Michael Evans - "Capability assessment and optimal dispatch of distributed stores"
  • 09 May 2018 Anastasios Oulis Rousis - "Optimal Design and Operation of a Hybrid AC/DC Microgrid"
  • 02 May 2018 Efstratios Batzelis - "Mathematical models of explicit form for photovoltaic systems"
  • 25 Apr 2018 James Wylie - "Modular Multi-level Converter with Increased Number of Effective Levels by using Asymmetric Sub-module Voltages for Medium Voltage Applications"
  • 18 Apr 2018 Arghavan Nazemi - "Energy Management of Parallel Hybrid Electric Vehicles"
  • 04 Apr 2018 Firdous Ul Nazir – "Scenario-based chance constrained Volt/VAR control in distribution systems"
  • 21 Mar 2018 Luis Badesa Bernardo – "Optimal Provision of Frequency Services in Decarbonised Grids"
  • 28 Feb 2018 Nicolas Faedo - "Optimal control of wave energy converters: fundamental principles and a moment-based approach"
  • 21 Feb 2018 David Burth Kurka - "Git and Github for research management"
  • 14 Feb 2018 Julio Perez Olvera - "Using Multi-terminal DC Networks to Improve the Hosting Capacity of Distribution Networks"
  • 31 Jan 2018 Hussain Akhtar - "Optimal Energy Management of Microgrids"
  • 17 Jan 2018 Francesca Boem - "Distributed Fault Detection for Interconnected Large-Scale Systems: a Scalable Plug & Play Approach"
  • 10 Jan 2018 Temitayo Oderinwale - "Strategic Investment Planning incorporating demand flexibility"
  • 13 Dec 2017 Nicolas Cifuentes - "Network Allocation of Battery Energy Storage Systems (BESS) considering stability criteria"
  • 6 Dec 2017 Alexander Gallo - "A distributed attack detection method for multi-agent systems governed by consensus-based control"
  • 29 Nov 2017 Omar Faqir - "Joint optimization of transmission and propulsion in aerial communication networks"
  • 22 Nov 2017 Thiago Mendonca - "Distributed Coordination of Energy Resources for Improving Network Hosting Capacity"
  • 15 Nov 2017 Alexandre Moreira - "An Adjustable Robust Optimization Approach for Contingency-Constrained Transmission Expansion Planning"