Francisco Gonzalez-Longatt

Francisco Gonzalez-Longatt
University of Exeter | UoE · College of Engineering, Mathematics and Physical Sciences

Doctor of Science
Founder and Leader of DIgEnSys-Lab | https://fglongattlab.fglongatt.org

About

421
Publications
660,282
Reads
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3,190
Citations
Additional affiliations
April 2019 - present
University of South-Eastern Norway
Position
  • Professor
October 2013 - present
Loughborough University
Position
  • Lecturer in Electrical Power System
January 2013 - September 2013
Coventry University
Position
  • Senior Lecturer in Electrical Engineering
Education
January 2017 - January 2018
Loughborough University
Field of study
  • Diploma in Leadership and Management (ILM Level 3)
January 2012 - January 2013
Coventry University
Field of study
  • Postgraduate Certificate in Higher Education Professional Practice
May 2002 - June 2008
Central University of Venezuela
Field of study
  • Power System and Distributed Generation

Publications

Publications (421)
Presentation
Full-text available
TITLE: Reaching Net-Zero by minimising operability risks: Challenges and possible solutions for GB system EVENT: International Conference on Renewable Energies and Smart Technologies (REST). DATE: 29 July 2022 PLACE: Tirana, Albania SLIDES: DOI:
Presentation
Full-text available
The computational burden and the time required to train a deep reinforcement learning (DRL) can be appreciable, especially for the particular case of a DRL control used for frequency control of multi-electrical energy storage (MEESS). This paper presents an assessment of four training configurations of the actor and critic network to determine the...
Presentation
Full-text available
The computational burden and the time required to train a deep reinforcement learning (DRL) can be appreciable, especially for the particular case of a DRL control used for frequency control of multi-electrical energy storage (MEESS). This paper presents an assessment of four training configurations of the actor and critic network to determine the...
Article
Full-text available
The oscillatory behaviour of the power system is an aspect that is significantly affected by the increasing integration of converter-based generation sources. Several works address the impact of non-synchronous generation on the operation of the system from different points of view, but only a few studies focus on power-frequency oscillations with...
Presentation
Full-text available
TITLE: "Reaching Net-Zero by minimising operability risks: Challenges and possible solutions for GB system" DATE: 8th June 2022 EVENT: UK-CHINA NET-ZERO ENERGY AND POWER WORKSHOP DOI: 10.13140/RG.2.2.33915.39201 YOUTUBE VIDEO: https://youtu.be/yo4wn_kfPWM
Article
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The need for Phasor Measurement Units (PMUs) is rising as renewable energy sources become more prevalent in power networks since the rate of change of frequency is being deteriorated. Appropriate and accurate network measurements are a requirement for the precise monitoring and control of the system. This paper presents a low-cost PMU development,...
Article
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Induction motors are key pieces of equipment in today’s society, powering a variety of industrial drives and home appliances. The induction motor speed is often used to monitor the performance of all kinds of industrial drives. For example, in the industrial field, the motor speed is very often used to determine the efficiency and mechanical load o...
Article
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Generation dispatching is a challenge in islanded microgrids due to the operational and economic restrictions in isolated zones. Furthermore, the impact of usual operational network changes in topology, load demand, and generation availability may become significant considering the grid size. This research paper presents a detailed multiple cost fu...
Article
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The increased use of distributed energy resources, especially electrical energy storage systems (EESS), has led to greater flexibility and complexity in power grids, which has led to new challenges in the operation of these systems, with particular emphasis on frequency regulation. To this end, the transmission system operator in Great Britain has...
Article
The massive penetration of distributed energy resources (DERs) in distribution networks provides a strategic opportunity for the distribution system operator (DSO) to coordinate the assets appropriately and offer services to the transmission systems. The IEEE std. 1547-2018 introduced a control mechanism to enable the power electronic converters (P...
Article
Microgrid (MG) is one of the practical and best concepts to provide energy access to rural communities, where electric grid extension is not techno-economically feasible. Since the trend of load consumption is not uniform with a low load factor in a rural area, the required rating of the system becomes very high. Similarly, the generation is fixed...
Book
This book features original papers from International Conference on Expert Clouds and Applications (ICOECA 2021), organized by GITAM School of Technology, Bangalore, India during February 18–19, 2021. It covers new research insights on artificial intelligence, big data, cloud computing, sustainability, and knowledge-based expert systems. The book d...
Article
Full-text available
Electricity markets provide valuable data for regulators, operators, and investors. The use of machine learning methods for electricity market data could provide new insights about the market, and this information could be used for decision-making. This paper proposes a tool based on multi-output regression method using support vector machines (SVR...
Chapter
This research paper proposes a turbine-governor modelling technique based on equivalent FCM (Fuzzy C-Means) for a control area of an equivalent power system used for frequency response analysis. The FCM algorithm implementation is proposed to find an equivalent Fuzzy model of n turbine-governors that are in an area of the electric power system (EPS...
Article
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Modern distance relays have integrated numerous protection functions, including power-swing blocking and out-of-step or pole-slip tripping functions. The main purpose of the power-swing blocking function is to differentiate faults from power swings and block distance or other relay elements from operating during stable or unstable power swings. Mos...
Article
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Because power electronic converter (PEC) dominated power generators do not provide the rotational inertia and the proportion of synchronous generators is reducing, the modern electrical grids are confronting a challenge of transient stability as the penetration rate rises. Analyzing the system characteristics is important for minimizing possible in...
Article
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This paper proposed a methodology of adaptive instantaneous overcurrent protection (AIOCP) setting that ensures that the protection coverage remains unchanged regardless of the operating condition of the electrical network. The methodology calculates the protection setting parameters based on the real-time estimation of the Thevenin equivalent circ...
Article
Full-text available
With growing concerns of climate change and unreliable fuel market, the world is moving towards an electric-based transportation system, one that entails a country to overhaul major infrastructures, establish high monetary funded research, change government regulations, and adapt available resources to transform its gasoline-based transportation sy...
Presentation
Full-text available
Can grid forming control applied in inverter-based resources (IBR) provide the solution for all the system services and needs? The lecture starts with a review of IBR and Variable Renewable Energy, elaborates on their grid forming and grid following control characteristics and finally discusses their capability of providing system services
Presentation
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TITLE: CoSimulation, Real-time simulation and HIL, IEEE PES Texas tech and PES GUB Event: IEEE conference Date: 16th October 2021 Video: https://youtu.be/xte5JTLxeRQ
Presentation
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Abstract—Inverter based generation (IBG) is a necessary technology in the energy transition and reaching ambitious objectives of zero-net emission. However, the colossal penetration of IBG may create several issues. Using Voltage source converters (VSCs) equipped with the so-called grid forming control is thought of as a long-term solution of IBG-d...
Presentation
Full-text available
The total system rotational inertia (H) is the primary source of electricity system robustness against frequency disturbances, especially immediately after the power imbalance is inserted in the power system. The traditional large generation units based on synchronous machines (SMs) directly connected to the grid are the primary sources of rotation...
Presentation
Full-text available
The static var compensator (SVC) mainly consists of a thyristor-controlled reactor (TCR) and a fixed capacitor (FC). In 2020, the install capacity of SVC was 30 MVAr, which was connected to the South Energy System (SES) of the Mongolian power system (MPS). The primary purpose of the SVC is to compensate reactive power, increase voltage stability an...
Presentation
Full-text available
Modern society is experiencing an amazingly fast transformation caused by technology; the impact of technological development is changing in many ways human life. The so-called technological convergence is the tendency for technologies that were originally unrelated to become more tightly integrated and even unified as they develop and advance. A v...
Preprint
Full-text available
Introduccion al DPL. Entrenamiento Avanzado de DIgSILENT PowerFactory: Programación usando DigSILENT Programming Language (DPL)) Prof Francisco M. Gonzalez-Longatt PhD fglongatt@fglongatt.org
Article
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The shift to a sustainable energy future is becoming more reliant on large-scale deployment of renewable and distributed energy resources raising concerns about frequency stability. Rate of Change of Frequency (RoCoF) is necessary as a system inertia metric in order for network operators to perform control steps to preserve system operation. This p...
Presentation
Full-text available
Mongolian power grid (MPG) is becoming more eco-friendly as the power system is continuously integrating renewable energy, which reached 20% of the total installed capacity of Mongolia in 2020. The daily operation and the safety of the MPG have become very challenging because of increased levels of energy in the system. Therefore, the dynamic behav...
Presentation
Full-text available
Title: GRID-FOLLOWING GRID-FORMING CONTROL: An overview of inertia response Event: DynPower 2021 Date: 13 Sept 2021 Website: https://www.zhaw.ch/en/engineering/institutes-centres/iefe/energy-storage-and-energy-grids/electric-power-systems-and-smart-grids/international-workshop-dynpower/
Presentation
Full-text available
Transition to Converter Interfaced generation technologies “Converter-driven stability” and “Resonance stability”. Developing a Power Electronic-Dominated Power System Short time mitigation: Inertia Monitoring and Estimation Power Electronic Converter: A quick introduction. Power Electronic Converter: Current source converter (CSC) Voltage source...
Presentation
Full-text available
Title: An overview of Power System Stability considering Power Electronic Converters Place: Universidad Politecncia Salesiana Place: Ecuador Date: 9th September 2021 Video: https://youtu.be/u0e7Mmg2hWQ
Presentation
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An overview of Power System Stability considering Power Electronic Converters. Seminar Universidad Politecnica Salesiana, Ecuador 9 September 2021
Preprint
Full-text available
Este entrenamiento avanzado está diseñado para que el participante reciba una compacta y eficiente introducción a los aspectos fundamentales de programación usando DPL.
Article
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The transient stability analysis of large-interconnected power systems using time-domain simulations (TDS) is a significant challenge since it represents a huge computational cost. Besides, for dynamic security assessment is required have a quick response. Consequently, recent approaches are relying on using the wide-area measurement system combine...
Article
Full-text available
With the increasing penetration rate of Power Electronic Converter (PEC) based technologies, the electrical power systems are facing the problem of transient stability since the PEC based technologies do not contribute to the system inertia, and the proportion of synchronous generators (i.e., the source of inertia) is in decreasing rate. In additio...
Article
Full-text available
The reactive power control mechanisms at the smart inverters will affect the voltage profile, active power losses and the cost of reactive power procurement in a different way. Therefore, this paper presents an assessment of the cost–benefit relationship obtained by enabling nine different reactive power control mechanisms at the smart inverters. T...
Article
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The massive integration of variable renewable energy (VRE) in modern power systems is imposing several challenges; one of them is the increased need for balancing services. Coping with the high variability of the future generation mix with incredible high shares of VER, the power system requires developing and enabling sources of flexibility. This...
Article
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Today, the power system operation represents a challenge given the security and reliability requirements. Mathematical models are used to represent and solve operational and planning issues related with electric systems. Specifically, the AC optimal power flow (ACOPF) and the DC optimal power flow (DCOPF) are tools used for operational and planning...
Article
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The European Union considers that offshore wind power will play a key role in making the EU the first climate-neutral continent by 2050. Currently, the potential of offshore wind energy is still untapped in Spain. Furthermore, the characteristics of the coastline in Spain require floating technology, making it challenging to install wind farms due...
Article
Full-text available
Stable power supply has become a crucial thing in the current era of technology and automation. Although the power system has multiple stability issues and causes, frequency fluctuation plays a vital role in normal operation, whereby a system with significant frequency deviation can lead to the needless blackouts of the whole power system. With the...
Presentation
Full-text available
La inercia rotacional (H) de las maquinas sincronicas es la fuente principal de robustez del sistema eléctrica ante las perturbaciones de frecuencia que surgen causadas por un desequilibrio de generación y demanda. Los grandes generadores sincronocios tradicionales conectados directamente a la red son las principales fuentes de inercia rotacional,...
Article
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With the massive penetration of electronic power converter (EPC)-based technologies, numerous issues are being noticed in the modern power system that may directly affect system dynamics and operational security. The estimation of system performance parameters is especially important for transmission system operators (TSOs) in order to operate a po...
Presentation
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"Low rotational Inertia Systems and Grid Friendly Power Electronic Converters", DATE: 27th May 2021 PLACE: IEEE IES Western Australia Chapter
Article
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This research paper proposes a methodology to apply identification methods to find a simplified model of three different governors in a single area electric power system (SAEPS). A SAEPS with different governors-turbine is presented: a hydraulic turbine, a steam turbine and a steam reheat turbine. In this same investigation, an analytic reduction h...
Presentation
Full-text available
The transition to a low carbon society is the driving force pushing the traditional power system to increase the volume of non-synchronous technologies, which mainly use power electronic converters (PECs) as an interface to the power network. The need for more environmentally friendly power systems is pushing to increase the number of renewable ene...
Chapter
Full-text available
The amount of electricity generated by traditional power plants accompanied by the non-conventional renewable resources has increased significantly in the latest years in Honduras. This is leading to a different dispatch operation that guarantees the lowest cost, optimizing the water resource installed and operated in the Honduran power system. The...
Presentation
Full-text available
Webinar "Challenges and solutions for Low Inertia Systems" IEEE Argelia and Tunisia 12 April 2021. IEEE Student Branch, University of Boumerde IEEE Student Branch, National Engineering School of Monastir 12nd April 2021, 8:00PM (GMT+1) Video available at: https://youtu.be/UIo7n1SCvvY
Chapter
A critical aspect of power systems is the generation cost of plants in producing the electrical energy required by consumers, this cost will be finally reflected in the monthly consumption bill. A nonoptimal dispatch will produce high tariffs while a well-designed dispatch will result in the lowest generation costs and, therefore, the lowest possib...
Article
Full-text available
Accompanying the advancement on the Internet of Things (IoT), the concept of remote monitoring and control using IoT devices is becoming popular. Digital smart meters hold many advantages over traditional analog meters, and smart metering is one of application of IoT technology. It supports the conventional power system in adopting modern concepts...
Chapter
The original version was inadvertently published with incorrect affiliation of Dr. Abdul W. Korai. The correct affiliation has been updated in the chapters 8, 9, 11, 13, and 14. The Correction chapters and book has been updated with the changes.
Article
Full-text available
Abstract The conventional structure of operating transmission and distribution systems is currently experiencing new challenges in maintaining the system operability with the significant changes such renewable energy sources inclusion, technology development, infrastructure revolution, and services provision. A futuristic operation management parad...
Article
Full-text available
The replacement of conventional generation sources by DER creates the need to carefully manage the reactive power maintaining the power system safe operation. The principal trend is to increase the DER volume connected to the distribution network in the coming years. Therefore, the microgrid represents an alternative to offer reactive power managem...
Presentation
Full-text available
Content: The role of the generation inertia in the robustness to frequency disturbance. The impact of low inertia generation in the rate of change of frequency (ROCOF) system contingencies. The fundamental aspects of system frequency in low inertia systems. The implication of non-synchronous technologies that use power converters on frequency cont...
Article
Full-text available
Frequency in power systems is a real-time information that shows the balance between generation and demand. Good system frequency observation is vital for system security and protection. This paper analyses the system frequency response following disturbances and proposes a data-driven approach for predicting it by using machine learning techniques...
Book
This book provides an overview of power electronic converters for numerical simulations based on DIgSILENT PowerFactory. It covers the working principles, key assumptions and implementation of models of different types of these power systems. The book is divided into three main parts: the first discusses high-voltage direct currents, while the se...
Article
Full-text available
The increasing deployment of wind power is reducing inertia in power systems. High-voltage direct current (HVDC) technology can help to improve the stability of AC areas in which a frequency response is required. Moreover, multi-terminal DC (MTDC) networks can be optimized to distribute active power to several AC areas by droop control setting sche...
Article
Full-text available
Declining levels of rotational inertia in modern power systems prompt transmission system operators (TSOs) to develop novel ways of maintaining the balance between generation and demand. Services such as fast frequency response (FFR) can help the TSO achieve this balance. The growing penetration of electric vehicles (EVs) promotes the provision of...
Conference Paper
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This paper investigates the positive changes in the system frequency response indicators caused by the implementation of a set of optimal settings of an under-frequency load shedding (UFLS) scheme. The optimal under-frequency load shedding (UFLS) scheme is optimised by minimising the total amount of load shedding and considering the recovery proces...
Conference Paper
Full-text available
In general, modern power systems are continually evolving due to the connection of renewable sources generation. In particular, the Mongolian power system (MPS) has been changing in recent years mainly by the integration of wind power and solar photovoltaic sources which until 2019 has been reached a 20% of the total generation sources. The most im...