Understanding and managing harmonics and supraharmonics in modern electricity networks
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| Date: | 21. - 22.05.2024 | ||||||||||||||||||||||||||||||||||||||||
| Aim of the course: | Network operators all over the word face increasing challenges to integrate more and more modern power electronic equipment, like photovoltaic inverters, electric vehicle chargers, LED lighting or battery storage systems into their grids. Due to energy efficiency policies, most of that equipment utilizes switching frequencies above 2 kHz, which results in growing distortion levels in the frequency range 2-150 kHz (supraharmonics). On the other hand, their impact on harmonics below 2 kHz remains still important. For a holistic view, not only emission, but also the impact on the network impedance characteristics (i.e. resonances) has to be considered. | ||||||||||||||||||||||||||||||||||||||||
| Target group: | Industry engineers, researchers, students | ||||||||||||||||||||||||||||||||||||||||
| Topics: | 1. Fundamentals • Disturbance mechanism, characterization and responsibilities • General interference mechanisms and electromagnetic compatibility • Mathematical basics (frequency domain, sequence domain) • Determination of short-circuit impedance 2. Standardization • Needs, committees (IEC), legal background • Principles of EMC coordination • EMC standards series IEC 61000 • Product standard EN 50160 (Europe) • Activities in CIRED, CIGRE and at European energy regulators 3. Measurement aspects • Measurement methods and indices (i.a. IEC 61000-4-7) • Measurement uncertainty (including transducers) • Objectives for grid measurements • Design criteria for measurement campaigns • Advanced data analysis approaches 4. Harmonics (1) • Power definitions under non-sinusoidal conditions • Typical sources • Summation of multiple sources • Propagation in the network 4. Harmonics (2) • Network harmonic impedance and resonances • Modelling and simulation techniques • Calculation of emission limits for customer installations • Evaluation of contribution of a customer installation 5. Interharmonics • Definitions, typical sources and effects • Propagation in the network 6. Supraharmonics • Definitions, typical sources and effects • Emission characteristics and interference paths • Summation of multiple sources 7. Case studies • Supraharmonic resonance in an LV network with fast charging station • Harmonic emission of a fast charging infrastructure with storage for peak shaving • Measurement-based assessment of harmonic emission of an industrial customer connected to the LV network • Impact of passive filter placement on harmonic impedance in transmission systems (simulation-based) • Measurement-based identification of network harmonic impedance and harmonic propagation in a 400-kV-network 8. Example calculation • Evaluation of harmonic voltage disturbances caused by EV charging • Implementation of simplified harmonic model of network • Implementation of simplified harmonic model of EV chargers • Calculation of disturbance level at the connection point (with/without background distortion) 9. Further challenges • Impact of increasing amount of power electronic based generation • Harmonic stability related to inverter-based generation • Unbalance caused by high-power single-phase equipment | ||||||||||||||||||||||||||||||||||||||||
| Study results: | This short course provides a holistic insight about harmonics, interharmonics and supraharmonics from a power systems perspective with special focus on the impact of modern equipment. After a brief repetition of important fundamentals, an introduction into EMC coordination concept, principles of limit allocation and the present status of IEC standardization are provided. Different aspects of harmonic and supraharmonic measurements in the field are explained from a practical viewpoint, including measurement uncertainty, design aspects of measurement campaigns and approaches for data analysis. Main sources of harmonic and supraharmonic emission along with their interaction (summation) and propagation in the network are presented. Measurements, video experiments and example calculations are used to facilitate the knowledge transfer. The short course finishes with a set of practical case studies related to recent challenges and interference phenomena in distribution and transmission systems. | ||||||||||||||||||||||||||||||||||||||||
| Course language: | in English | ||||||||||||||||||||||||||||||||||||||||
| Volume: | lectures: 16 academic hours | ||||||||||||||||||||||||||||||||||||||||
| Graduation document: | TalTech certificate | ||||||||||||||||||||||||||||||||||||||||
| Lecturer: | Prof Jan Meyer received the Ph.D. degree in electrical power engineering and postdoctoral qualification in Power Quality from Technische Universitaet Dresden, Dresden, Germany, in 2004 and 2018 respectively. He is the Team Leader of the research group “Power Quality” at the chair of Power Systems and has been appointed as Prof. in the field of “Power Quality” in 2022. His research interests include network disturbances and their assessment, especially distortion below and above 2 kHz, all aspects related to the uncertainty in Power Quality measurements as well as the efficient and automated analysis of large data amounts from Power Quality measurement campaigns. Jan Meyer is member of several national and international working groups on EMC standardization and co-chair of the German EMC Committee UK767.1. He is active in several IEEE and CIGRE working groups. | ||||||||||||||||||||||||||||||||||||||||
| Contact: | Jako Kilter, jako.kilter@taltech.ee; Kätlin Reisberg, katlin.reisberg@taltech.ee (general inquiry and invoicing) | ||||||||||||||||||||||||||||||||||||||||
| Price: | 1000 EUR + VAT / participant | ||||||||||||||||||||||||||||||||||||||||
| Remarks about the price: | Participants from industry: 1000 EUR + VAT Participants from academy: 500 EUR + VAT Participants invovled with COSPACT project: free of charge | ||||||||||||||||||||||||||||||||||||||||
| Registration start: | 08.03.2024 09:00 | ||||||||||||||||||||||||||||||||||||||||
| Registration deadline: | 17.05.2024 | ||||||||||||||||||||||||||||||||||||||||
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