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Publications (10 of 10) Show all publications
Jahn, I., Bessegato, L., Björk, J., Hohn, F., Norrga, S., Svensson, N., . . . Despouys, O. (2019). A Proposal for Open-Source HVDC Control. In: : . Paper presented at 2019 IEEE PES Innovative Smart Grid Technologies Europe (ISGT-Europe).
Open this publication in new window or tab >>A Proposal for Open-Source HVDC Control
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2019 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Future multiterminal high-voltage direct-current (HVDC) grids are considered an enabling technology to efficiently integrate large amounts of renewable energy into the existing grid. However, already in today’s existing point-to-point HVDC links, harmonic interaction issues and instabilities related to the controland protection system of the converters have been reported. The converter control software is usually black-boxed and problems are therefore solved in close cooperation with the HVDC vendor. This paper aims to provide a starting point for a discussion onan open-source HVDC control system. In particular, it covers the control design including technical and non-technical aspects. The open-source approach can be useful to solve current as wellas future control-related problems, both in point-to-point links as well as in multiterminal and multivendor HVDC grids.

Keywords
HVDC transmission, Open source software
National Category
Engineering and Technology
Identifiers
urn:nbn:se:kth:diva-257736 (URN)
Conference
2019 IEEE PES Innovative Smart Grid Technologies Europe (ISGT-Europe)
Note

QC 20190917

Available from: 2019-09-03 Created: 2019-09-03 Last updated: 2019-10-14Bibliographically approved
Leterme, W., Jahn, I., Ruffing, P., Sharifabadi, K. & Van Hertem, D. (2019). Designing for High-Voltage dc Grid Protection: Fault Clearing Strategies and Protection Algorithms. IEEE Power and Energy Magazine, 17(3), 73-81
Open this publication in new window or tab >>Designing for High-Voltage dc Grid Protection: Fault Clearing Strategies and Protection Algorithms
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2019 (English)In: IEEE Power and Energy Magazine, ISSN 1540-7977, E-ISSN 1558-4216, Vol. 17, no 3, p. 73-81Article in journal (Other (popular science, discussion, etc.)) Published
Abstract [en]

Protecting High-Voltage (HV) dc grids requires a different approach compared with that of ac power system protection and poses one of the major challenges that must be resolved before the realization of large scale HVdc grids that use equipment from multiple vendors. HVdc grid protection, which is essential for safe and reliable HVdc grid operation, entails the appropriate detection and fault clearing of dc-side short circuit faults (i.e., dc faults). In this context, fault clearing refers to interrupting the dc fault current and isolating the faulted component. Fault current interruption is much more complex in HVdc grids compared to ac systems because dc fault currents have no naturally recurring zero crossings and, without countermeasures, quickly increase to values that are unacceptable for power electronic components. Conversely, the technologies used within HVdc grids offer options for fault clearing beyond the well-known approach of using circuit breakers in existing ac systems.

Place, publisher, year, edition, pages
IEEE Press, 2019
National Category
Engineering and Technology
Research subject
Electrical Engineering
Identifiers
urn:nbn:se:kth:diva-249981 (URN)10.1109/MPE.2019.2897188 (DOI)000466095200009 ()2-s2.0-85064981751 (Scopus ID)
Note

QC 20190617

Available from: 2019-04-24 Created: 2019-04-24 Last updated: 2019-10-18Bibliographically approved
Wang, M., Jovcic, D., Leterme, W., van Hertem, D., Zaja, M. & Jahn, I. (2019). Pre-standardisation of Interfaces between DC Circuit Breaker and Intelligent Electronic Device to Enable Multivendor Interoperability. In: : . Paper presented at CIGRE Symposium Aalborg, 4-7-Juni 2019 Denmark.
Open this publication in new window or tab >>Pre-standardisation of Interfaces between DC Circuit Breaker and Intelligent Electronic Device to Enable Multivendor Interoperability
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2019 (English)Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

DC circuit breakers (DCCBs) are one of the key components to facilitate large meshed HVDC grids. Driven by the needs for achieving high speed, low loss and low cost, various DCCB technologies have been proposed for HVDC applications. Unlike AC circuit breakers (ACCBs), some DCCBs provide a variety of functions, such as proactive opening or fault current limiting (FCL), mainly attributed to the high controllability of the power electronic switches used in such DCCBs. To enable these functions, the intelligent electronic devices (IEDs) are expected to provide signals steering these functions in addition to a trip command. Interoperability between IEDs and DCCBs from different vendors is considered feasible, but expected to be more complex than their AC counterparts, due to the different functions provided by various DCCB technologies. It is therefore crucial to understand which of the functions are essential to fulfil the requirements imposed in HVDC grid protection, and to standardise the interfaces between the IEDs and DCCBs to achieve multivendor interoperability between IEDs and DCCBs provided by different vendors. This paper first classifies the DCCB functions into minimally required and auxiliary ones based on reviewing the existing literature. Then, standardised interfaces between the IEDs and DCCBs are proposed to enable both types of DCCB functions. An example of such IED is implemented in PSCAD/EMTDC to demonstrate that the proposed interfaces are adequate to enable both minimally required and auxiliary functions using a four-terminal test system. Auxiliary functions of hybrid DCCBs, such as proactive opening, fault current limiting, fast reclosing and reopening, breaker failure internal detection and repeated O-C-O operation are demonstrated by simulations.

Keywords
HVDC grid protection, DC circuit breaker, intelligent electronic device, standardised interfaces, multivendor interoperability
National Category
Engineering and Technology
Identifiers
urn:nbn:se:kth:diva-252358 (URN)
Conference
CIGRE Symposium Aalborg, 4-7-Juni 2019 Denmark
Note

QC 20190819

Available from: 2019-05-28 Created: 2019-05-28 Last updated: 2019-10-18Bibliographically approved
Chaffey, G., Jahn, I., Loenders, R., Leterme, W., Dejene, F. Z., Wang, M., . . . Van Hertem, D. (2019). Requirements for functional testing of HVDC protection IEDs. In: : . Paper presented at CIGRE B4 International Colloquium 1st - 4th October 2019 Johannesburg, South Africa.
Open this publication in new window or tab >>Requirements for functional testing of HVDC protection IEDs
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2019 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Development of Intelligent Electronic Devices (IED) for HVDC protection is underway, driven in part by the prospective demands of future multiterminal HVDC systems. There is, however, no consensus on how to test the functionality of an HVDC protection IED. Successful operation of a future multivendor HVDC protection system requires functional specifications and harmonised test procedures for protection system components, including the protection IED. This paper presents an introduction to functional testing methods for HVDC protection IEDs. Evaluating the protection algorithm characteristic using synthetic waveforms is first performed, i.e. ’functional type testing’. Given that test procedures are in part dependent on the protection algorithm, tests are developed and presented for several algorithms. The behaviour of the IED in a power system simulation is then examined during generalised yet representative fault transients, i.e. equivalent to ’dynamic validation type testing’ of AC protection algorithms. The combination of functional and dynamic validation type testing allows the generalised functionality of the IED to be evaluated - testing the algorithm, hardware and software implementation, and overall performance. To provide examples of test procedures, an open-source HVDC IED prototype is tested in a hardware-in-the-loop configuration using a real-time simulator. The operation and accuracy of the protection characteristics are first examined, before the IED performance under representative waveforms is determined. Through tests of several non-unit line protection algorithms, it is shown that, depending on the algorithm applied, the IED is dependable for simulated faults within the protection zone, and secure during external faults. Moreover,the test configurations and procedures required to evaluate the functionality and the criteria for success are developed.

Keywords
HVDC protection, Functional type testing, Dynamic validation type testing, Real-time simulation, HVDC relaying, HVDC protection IED, Hardware in the loop, Standardisation, Harmonisation.
National Category
Engineering and Technology
Identifiers
urn:nbn:se:kth:diva-260572 (URN)
Conference
CIGRE B4 International Colloquium 1st - 4th October 2019 Johannesburg, South Africa
Note

QCR 20191015

Available from: 2019-09-30 Created: 2019-09-30 Last updated: 2019-10-18Bibliographically approved
Jahn, I., Hohn, F. & Norrga, S. (2018). Impact of measurement and communication aspects on protection of multi-terminal DC grids. Paper presented at The 14th International Conference on Developments in Power System Protection (DPSP 2018). IET - The Journal of Engineering
Open this publication in new window or tab >>Impact of measurement and communication aspects on protection of multi-terminal DC grids
2018 (English)In: IET - The Journal of Engineering, E-ISSN 2051-3305Article in journal (Refereed) Published
Abstract [en]

The increased demand for renewable energy generation requires the higher flexibility of transmission systems. This requirement together with technical progress in high-voltage DC technology has resulted in the ambition to build large-scale multi-terminal DC grids. To achieve this goal, vendor interoperability is considered a key element. Standards exist for AC systems, but not for DC systems. This work discusses and evaluates the suitability of AC standards for DC systems. As a result, a different view on substation architecture is developed and two communication protocols are suggested for further investigation in this context.

Place, publisher, year, edition, pages
Institution of Engineering and Technology, 2018
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electrical Engineering
Identifiers
urn:nbn:se:kth:diva-239179 (URN)10.1049/joe.2018.0166 (DOI)000447973200071 ()
Conference
The 14th International Conference on Developments in Power System Protection (DPSP 2018)
Projects
PROMOTioN
Note

This paper is the journal version of the corresponding conference paper (DPSP 2018). QC 20181130

Available from: 2018-11-19 Created: 2018-11-19 Last updated: 2019-05-10Bibliographically approved
Jahn, I., Hohn, F. & Norrga, S. (2018). Impact of Measurement and Communication on Protection of MTDC Grids. In: : . Paper presented at 14th IET International Conference on Developments in Power System Protection (DPSP) 2018.
Open this publication in new window or tab >>Impact of Measurement and Communication on Protection of MTDC Grids
2018 (English)Conference paper, Published paper (Refereed)
Abstract [en]

The increased demand for renewable energy generation requires higher flexibility of transmission systems. This requirement together with technical progress in high-voltage direct-current (HVDC) technology have resulted in the ambition to build large-scale multi-terminal DC (MTDC) grids. To achieve this goal, vendor interoperability is considered a key element. Standards exist for AC systems,but not for DC systems. This work discusses and evaluates the suitability of AC standards for DC systems. As a result, a different view on substation architecture is developed and two communication protocols are suggested for further investigation in this context.

Keywords
HVDC, protection, communication, delays
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-224212 (URN)
Conference
14th IET International Conference on Developments in Power System Protection (DPSP) 2018
Note

QCR 20180314

Available from: 2018-03-13 Created: 2018-03-13 Last updated: 2019-10-18Bibliographically approved
Jahn, I., Johannesson, N. & Norrga, S. (2017). Survey of Methods for Selective DC Fault Detection in MTDC Grids. In: The 13th IET international conference on AC and DC Power Transmission, Manchester (ACDC 2017), Feb. 2017.: . Paper presented at The 13th IET international conference on AC and DC Power Transmission, Manchester (ACDC 2017), Feb. 2017..
Open this publication in new window or tab >>Survey of Methods for Selective DC Fault Detection in MTDC Grids
2017 (English)In: The 13th IET international conference on AC and DC Power Transmission, Manchester (ACDC 2017), Feb. 2017., 2017Conference paper, Published paper (Refereed)
Keywords
Multi-terminal; VSC-HVDC; line protection; fault detection
National Category
Engineering and Technology
Identifiers
urn:nbn:se:kth:diva-203232 (URN)2-s2.0-85019651814 (Scopus ID)
Conference
The 13th IET international conference on AC and DC Power Transmission, Manchester (ACDC 2017), Feb. 2017.
Note

QC 20170315

Available from: 2017-03-14 Created: 2017-03-14 Last updated: 2019-05-10Bibliographically approved
Jahn, I., Townsend, C. D. & de la Parra, H. Z. (2016). Model-Predictive Modulation Strategy for a Hybrid Si-SiC Cascaded H-Bridge Multi-Level Converter. In: 2016 18TH EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS (EPE'16 ECCE EUROPE): . Paper presented at 18th European Conference on Power Electronics and Applications (EPE), SEP 05-09, 2016, GERMANY. IEEE
Open this publication in new window or tab >>Model-Predictive Modulation Strategy for a Hybrid Si-SiC Cascaded H-Bridge Multi-Level Converter
2016 (English)In: 2016 18TH EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS (EPE'16 ECCE EUROPE), IEEE, 2016Conference paper, Published paper (Refereed)
Abstract [en]

This paper analyses new model-predictive modulation strategies applied to hybrid Silicon Silicon-Carbide cascaded H-bridge (CHB) converters. The analysis identifies a suitable ratio of Silicon to Silicon-Carbide cells and the appropriate modulation strategy applied to this topology concept. The evaluation is based on semiconductor losses and harmonic performance.

Place, publisher, year, edition, pages
IEEE, 2016
Series
European Conference on Power Electronics and Applications, ISSN 2325-0313
Keywords
Silicon, Silicon Carbide (SiC), Multilevel converters, STATCOM, Modulation strategy
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-197012 (URN)10.1109/EPE.2016.7695434 (DOI)000386637300183 ()2-s2.0-84996798778 (Scopus ID)
Conference
18th European Conference on Power Electronics and Applications (EPE), SEP 05-09, 2016, GERMANY
Note

QC 20161209

Available from: 2016-12-09 Created: 2016-11-28 Last updated: 2019-10-18Bibliographically approved
Kabzinski, J., Budde-Meiwes, H., Jahn, I., Kowal, J., Sauer, D. U. & Karden, E. (2015). Modeling Dynamic Charge Acceptance of Lead-Acid Batteries for Micro-Hybrid Vehicles with Focus on Influence of Previous Discharge Rate: Poster in Kraftwerk Batterie, Aachen, 2015.
Open this publication in new window or tab >>Modeling Dynamic Charge Acceptance of Lead-Acid Batteries for Micro-Hybrid Vehicles with Focus on Influence of Previous Discharge Rate: Poster in Kraftwerk Batterie, Aachen, 2015
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2015 (English)Other (Other academic)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:kth:diva-255037 (URN)
Note

QC 20190827

Available from: 2019-07-16 Created: 2019-07-16 Last updated: 2019-10-18Bibliographically approved
Kabzinski, J., Budde-Meiwes, H., Jahn, I., Kowal, J., Sauer, D. U. & Karden, E. (2014). Modeling Dynamic Charge Acceptance of SLI Batteries for Micro-Hybrid Vehicles: Presentation in 14th European Lead Battery Conference (ELBC), Edinburgh, 2014..
Open this publication in new window or tab >>Modeling Dynamic Charge Acceptance of SLI Batteries for Micro-Hybrid Vehicles: Presentation in 14th European Lead Battery Conference (ELBC), Edinburgh, 2014.
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2014 (English)Other (Other academic)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:kth:diva-255038 (URN)
Note

QC 20190827

Available from: 2019-07-16 Created: 2019-07-16 Last updated: 2019-10-18Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-0579-2639

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