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3rd International Conference on Energy Transition in the Mediterranean Area, SyNERGY MED 2024

作者： Barac, Bojana Capuder, Tomislav Panteli, Mathaios University of Zagreb Faculty of Electrical Engineering and Computing Department of Energy and Power Systems Croatia University of Cyprus Department of Electrical and Computer Engineering Cyprus

ISBN: (纸本)9798350375923

With the increasing penetration of photovoltaic (PV) systems posing challenges to power system stability, this paper investigates the effectiveness of grid-forming controlled PV systems in providing frequency ancillary services. The study implements the Virtual Synchronous Machine strategy, utilizing DC-link capacitor energy for inertial response provision (DCVQVSM), integrated within a grid-forming topology. To ensure power-frequency droop control, an additional control loop is introduced within the DCVQ-VSM topology. The efficacy of this control system is proved through simulations conducted on a simple two-bus system and a fully-electrified active distribution network (ADN). Both case studies demonstrate the successful operation of grid-forming controlled PV systems, highlighting their capability to influence power system frequency dynamics. The analysis underscores the significance of deloading PV operation in facilitating flexibility services provision, thereby enhancing the reliability and resilience of system operation. © 2024 IEEE.

关键词： Synchronous machinery

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Validation of a Three-Dimensional Dynamic Wind Farm Flow Model for Real-Time Simulation 32

Validation of a Three-Dimensional Dynamic Wind Farm Flow Mod...

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32nd Mediterranean Conference on Control and Automation, MED 2024

作者： Kipke, Vile Sourkounis, Constantinos Institute for Power Systems Technology and Power Mechatronics Ruhr University Faculty of Electrical Engineering and Information Technology Bochum Bochum44801 Germany

ISBN: (纸本)9798350395440

This paper presents simulation results of a real-time capable three-dimensional wind farm flow model, which provides an environment to simulate aerodynamic conditions in wind farms and turbine interactions. It allows to develop, validate and improve individual turbine control, collective wind farm flow control and wind farm cluster optimization techniques while taking grid interactions into account. Wind farm optimization and grid integration will gain more interest, as wind energy is expected to strongly increase in the next years, resulting in more wind farms which are clustered and closely located. This work specifically addresses dynamic wake modeling to predict the impact of wind turbines on wind farm flow and power generation of individual turbines within a wind farm through wake interactions. The simulation framework is briefly described and particular modifications of the implemented wake model are presented. Simulation results are shown to demonstrate the model capabilities and are validated against data from literature to asses its accuracy and to determine further possible improvements. © 2024 IEEE.

关键词： Wakes

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Influence of Aerodynamic Couplings on the Support of Reserve power with Wind Farms 32

Influence of Aerodynamic Couplings on the Support of Reserve...

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32nd Mediterranean Conference on Control and Automation, MED 2024

作者： Spichartz, Benedikt Sourkounis, Constantinos The Institute for Power Systems Technology and Power Mechatronics Ruhr University Bochum Faculty of Electrical Engineering and Information Technology Bochum44801 Germany

ISBN: (纸本)9798350395440

The transformation of the European grid from conventional to climate neutrality, leads to power converter dominated grids with changed requirements for grid stability. Especially wind farms have to contribute to grid support and grid building due to their high percentage on the total energy supply. While the provision of the required reserve power for stand-alone turbines by pitching or increasing the speed has been widely researched, there is a need for further investigations regarding the supply in wind farms due to the aerodynamic couplings. In this paper, requirements of the future grid are explained and the influence of wind speed changes caused by the reserve operation point are investigated. In this context, new definitions of sum-MPP and global-MPP are introduced. On the basis of simulation studies with dynamical wind turbine and wind emulation, advantages and disadvantages of the reserve strategies in a wind farm are discussed. The dynamic performance of inertia, primary and secondary power supply is investigated in terms of robustness and component stress. © 2024 IEEE.

关键词： Computational fluid dynamics

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Control of power Reserves at Wind Farms with Availability for Inertia, Primary and Secondary power Supply and Thrust Force Reduction 32

Control of Power Reserves at Wind Farms with Availability fo...

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32nd Mediterranean Conference on Control and Automation, MED 2024

作者： Spichartz, Benedikt Sourkounis, Constantinos Institute for Power Systems Technology and Power Mechatronics Ruhr University Bochum Faculty of Electrical Engineering and Information Technology Bochum44801 Germany

ISBN: (纸本)9798350395440

The transformation of the European grid from conventional power plants to climate neutrality, leads to an in-crease of regenerative energy sources and to a power converter dominated grid. Grid services like the supply of inertia, primary and secondary power must be delivered by renewable energies and accumulators, whereby wind farms have a central role due to its high contribution to power supply. Despite this, the adjustment of power reserves and their provision in the event of a fault is currently still rarely researched. In this paper a control concept is introduced, that enables a WF to keep robust power reserves and to support it for instantaneous, primary and secondary power control. On the basis of a simulation study, advantages of this approach in terms of grid support, reduction of aerodynamic couplings and reduction of thrust forces are shown. The provision of reserves in the event of wind rotation and the dynamical supply in grid faults are also investigated. For the simulation a holistic model with aerodynamic wind field, wind rotor and drive train emulation as well as separation of WT and management area is used. Furthermore, approaches are given for the transfer to a market-ready overall solution. © 2024 IEEE.

关键词： Computational fluid dynamics

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Three-Dimensional Dynamic Wake Model for Real-Time Wind Farm Simulation 32

Three-Dimensional Dynamic Wake Model for Real-Time Wind Farm...

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32nd Mediterranean Conference on Control and Automation, MED 2024

作者： Kipke, Vile Sourkounis, Constantinos Institute for Power Systems Technology and Power Mechatronics Ruhr University Bochum Faculty of Electrical Engineering and Information Technology Bochum44801 Germany

ISBN: (纸本)9798350395440

This paper presents the modeling framework Smart WindPark Laboratory Wind Flow Model for real-time capable and three-dimensional dynamic wind farm simulation. Coupling it to a set of laboratory-scaled wind turbine test benches allows for holistic wind farm simulations, covering dynamics ranging from the aerodynamics domain through mechatronics to power electronics and grid interaction with all relevant cross-couplings. Collective wind farm operation through active wake control, dynamic interactions between wind farms and cluster optimization or grid support by providing frequency restoration reserves are fields of research which require a simulation environment with the aforementioned capabilities. This work particularly focuses on dynamic wake modeling to predict the impact of wind turbines on ambient flow in terms of velocity deficit, increased turbulence and wake meandering. Based on model requirements, a modular framework designed for real-time execution is proposed, modeling and implementation aspects are discussed and simulation results are presented. © 2024 IEEE.

关键词： Wind turbines

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Advanced Constant Active power and Inertia Control of Wind power System with Supercapacitor Energy Storage System 32

Advanced Constant Active Power and Inertia Control of Wind P...

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32nd Mediterranean Conference on Control and Automation, MED 2024

作者： Isa, Abubakar Sourkounis, Constantinos Institute for Power Systems Technology and Power Mechatronics Ruhr University Bochum Faculty of Electrical Engineering and Information Technology Bochum44805 Germany

ISBN: (纸本)9798350395440

This paper presents an enhanced approach to managing a Double Fed Induction Generator (DFIG) wind turbine with a Supercapacitor (SC) energy storage system. The focus is on achieving constant active power and inertia control. The technique involves linking the supercapacitor to the DC link of the DFIG converters to achieve the desired constant wind active power control. Moreover, the impact of Virtual Inertia (VI) support via the Energy Storage System (ESS) and rotating mass of DFIG is investigated. The study includes a detailed analysis of two simulation scenarios, highlighting the respective advantages and limitations of each approach. © 2024 IEEE.

关键词： Wind turbines

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power transmission network planning under uncertainties

Power transmission network planning under uncertainties

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2024 IEEE PES Innovative Smart Grid Technologies Europe Conference, ISGT EUROPE 2024

作者： Vukadinović, Neven Pavić, Ivica Holjevac, Ninoslav Zagreb Croatia University of Zagreb Faculty of Electrical Engineering and Computing Department of Energy and Power Systems Zagreb Croatia

ISBN: (纸本)9789531842976

The optimization of load flow analysis is crucial for the efficient observation of the impact of new power plants into existing electricity power systems (EPS). The advent of integration of new energy sources has reduced construction timeline requirements to 4-5 years, creating a lag in the development of supporting electricity infrastructure. This paper explores the spatial and temporal dimensions of EPS development planning, illustrated through the example of two new connection requests to a transmission network, with emphasis on importance of load flow optimization and the potential failure analysis to meet the (N-1) contingency criterion, which ensures system reliability during outages. This paper underscores the necessity of strategic planning in EPS development to accommodate new generation units while maintaining system stability and reliability at the satisfactory levels. © 2024 IEEE.

关键词： Load flow optimization

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Simple Mathematical Model of BESS Suitable for Optimization Purposes 15

Simple Mathematical Model of BESS Suitable for Optimization ...

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15th International Conference Elektro, ELEKTRO 2024

作者： Tomasov, Marian Tkac, Matej Stanko, Pavel Matejko, Martin University of Žilina Faculty of Electrical Engineering and Information Technology Department of Power Systems and Electric Drives ŽILINA Slovakia

ISBN: (纸本)9798350372359

Modelling of battery systems is becoming an important aspect in the fields of electric power engineering and electromobility. With the rapid development of artificial intelligence and optimization algorithms that enable the optimization and efficiency improvement of almost any system, battery models are used as a tool to optimize the operation of electric grids, electric vehicle charging, or storing excess energy generated from renewable sources. Optimization involves a large number of computations with a significant volume of data, so the use of less complex models is advantageous, especially in the initial phases. A simple model can ensure quick calculations, easy supervision, error detection, and the optimization result is more stable and easier to interpret. This article introduces a simple mathematical model of a battery system suitable for the initial stages of optimization problems. The main advantages lie in the straightforward parameterization and implementation of the model. © 2024 IEEE.

关键词： Optimization

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A systematic review of real-time detection and classification of power quality disturbances

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Protection and Control of Modern power systems 2023年第1期8卷 30-66页

作者： Joaquín E.Caicedo Daniel Agudelo-Martínez Edwin Rivas-Trujillo Jan Meyer Faculty of Engineering Universidad Distrital Francisco Joséde CaldasBogotáColombia Institute of Electrical Power Systems and High Voltage Engineering Technische Universität DresdenDresdenGermany Bogotá Colombia

This paper offers a systematic literature review of real-time detection and classification of power Quality Disturbances(PQDs).A particular focus is given to voltage sags and notches,as voltage sags cause huge economic losses while research on voltage notches is still very incipient.A systematic method based on scientometrics,text similarity and the analytic hierarchy process is proposed to structure the review and select the most relevant literature.A biblio-metric analysis is then performed on the bibliographic data of the literature to identify relevant statistics such as the evolution of publications over time,top publishing countries,and the distribution by relevant topics.A set of articles is subsequently selected to be critically *** critical review is structured in steps for real-time detection and classification of PQDs,namely,input data preparation,preprocessing,transformation,feature extraction,feature selec-tion,detection,classification,and *** associated with the type of disturbance(s)addressed in the literature are also explored throughout the review,including the perspectives of those studies aimed at multiple PQDs,or specifically focused on voltage sags or voltage *** real-time performance of the reviewed tools is also ***,unsolved issues are discussed,and prospects are highlighted.

关键词： Bibliometric analysis Classification Detection power quality(PQ) Real-time Systematic review Voltage sag Voltage notch

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ASSESSMENT OF THE SIGNIFICANCE OF FEATURES FOR THE IDENTIFICATION OF DOMESTIC APPLIANCES 27

ASSESSMENT OF THE SIGNIFICANCE OF FEATURES FOR THE IDENTIFIC...

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27th International Conference on Electricity Distribution, CIRED 2023

作者： Ma, Liya Schmidt, Maximilian Schegner, Peter Technische Universitaet Dresden Institute of Electrical Power Systems and High Voltage engineering Faculty of Electrical and Computer Engineering Dresden Germany

ISBN: (纸本)9781839539596

The load identification technologies in the domestic field, also called Non-Intrusive Load Monitoring (NILM), aim to break down the total electricity consumption at household level to the appliance level. This detailed information helps to identify the behaviour of users, deduce energy saving concepts, or provide live assistance for the residents. The NILM approaches are carried out with appliance features, such as the absorbed power, the voltage and current profile. They are defined as appliance-specific characteristics or features, which supposed to make the appliance clearly distinguishable from others. However, most of the publications focus on the identification algorithms. There is barely a contribution to analyse the significance of features. Hereby, the significance means, how consistent and reliable a feature differs from one appliance to another. This paper works on this question. Based on analyses of publications and own measurements, this paper gives an overview of the significance of representative features. Furthermore, suitable features for one-second data are selected and NILM is carried out. © The Institution of engineering and Technology 2023.

关键词： Domestic appliances

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