EPE Association: EPE 2022 - LS5e: Benchmarking & Testing

EPE 2022 - LS5e: Benchmarking & Testing
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2022 ECCE Europe - Conference > EPE 2022 - Topic 07: Power Supplies > EPE 2022 - LS5e: Benchmarking & Testing

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   Design and Development of a Short-Circuit Test Bench for Low-Voltage Direct Current Protection Devices
By Simon RAVYTS [View]
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Abstract: In this paper, the design and development of a short-circuit test bench for LVDC protection devices will be presented. The popularity of LVDC microgrids is increasing due to the better compatibility withDC loads, DC storage and DC generation. However, the protection of these grids remains one of thekey hurdles to be overcome before a further industrialization is possible. An important aspect to beconsidered is the fact that the testing procedures that are described in today's standards do not align with the short-circuit currents that are encountered in converter dominated LVDC grids. The standard IEC test procedures are based on a strong, inductive LVDC grid. However, a converter dominated LVDC grid is more capacitive than inductive and the short-circuit currents that flow contain a fast transient peak that might go unnoticed. Therefore, a test bench was developed to test LVDC circuit breakers under realistic fault conditions.

   Generation of benchmark microgrids and an application to the ESUSCON project
By Oscar DÖRNER [View]
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Abstract: A novel methodology for the generation of benchmark microgrids is proposed. For validation purposes, the methodology is applied to the case of the Chilean microgrid ESUSCON. More than 220,000 operating data points are generated, and subsequently validated according to the proposed methodology. Finally, all the estimates and assumptions are published.

   Research Laboratory for Testing Grid Connected Devices under Grid Voltage / Grid Impedance Variations and Microgrid Conditions
By Swen BOSCH [View]
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Abstract: Distributed (renewable) energy sources and a growing amount of loads are connected to the grid via (switched) power electronics. To investigate the grid-integration of these devices, a test bench was built up, which offers the possibility to vary the impedance and the voltage (in amplitude, waveform and frequency) at the PCC during operation. For this purpose, the test bench includes a transformer-based Grid Voltage Emulator, a Grid Impedance Emulator as well as a 4Q-AC-Source. Due to the increasing use of power electronics, the grid tends to behave capacitively in some load cases. To cover this topic as well, the test stand also includes a binary graded capacitor bank to emulate volatile capacitive loads.The design, realization and operation of the respective components is described in this paper. In addition, various experimental results regarding the grid voltage and impedance emulator are presented focusing e.g. on the current commutation of highly inductive loads. Furthermore, measurements of different devices under test, like an impedance analyzer or an active resonance damper, are shown.

EPE 2022 - LS5e: Benchmarking & Testing
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2022 ECCE Europe - Conference > EPE 2022 - Topic 07: Power Supplies > EPE 2022 - LS5e: Benchmarking & Testing
	[return to parent folder]

	Design and Development of a Short-Circuit Test Bench for Low-Voltage Direct Current Protection Devices By Simon RAVYTS	[View] [Download]
Abstract: In this paper, the design and development of a short-circuit test bench for LVDC protection devices will be presented. The popularity of LVDC microgrids is increasing due to the better compatibility withDC loads, DC storage and DC generation. However, the protection of these grids remains one of thekey hurdles to be overcome before a further industrialization is possible. An important aspect to beconsidered is the fact that the testing procedures that are described in today's standards do not align with the short-circuit currents that are encountered in converter dominated LVDC grids. The standard IEC test procedures are based on a strong, inductive LVDC grid. However, a converter dominated LVDC grid is more capacitive than inductive and the short-circuit currents that flow contain a fast transient peak that might go unnoticed. Therefore, a test bench was developed to test LVDC circuit breakers under realistic fault conditions.

	Generation of benchmark microgrids and an application to the ESUSCON project By Oscar DÖRNER	[View] [Download]
Abstract: A novel methodology for the generation of benchmark microgrids is proposed. For validation purposes, the methodology is applied to the case of the Chilean microgrid ESUSCON. More than 220,000 operating data points are generated, and subsequently validated according to the proposed methodology. Finally, all the estimates and assumptions are published.

	Research Laboratory for Testing Grid Connected Devices under Grid Voltage / Grid Impedance Variations and Microgrid Conditions By Swen BOSCH	[View] [Download]
Abstract: Distributed (renewable) energy sources and a growing amount of loads are connected to the grid via (switched) power electronics. To investigate the grid-integration of these devices, a test bench was built up, which offers the possibility to vary the impedance and the voltage (in amplitude, waveform and frequency) at the PCC during operation. For this purpose, the test bench includes a transformer-based Grid Voltage Emulator, a Grid Impedance Emulator as well as a 4Q-AC-Source. Due to the increasing use of power electronics, the grid tends to behave capacitively in some load cases. To cover this topic as well, the test stand also includes a binary graded capacitor bank to emulate volatile capacitive loads.The design, realization and operation of the respective components is described in this paper. In addition, various experimental results regarding the grid voltage and impedance emulator are presented focusing e.g. on the current commutation of highly inductive loads. Furthermore, measurements of different devices under test, like an impedance analyzer or an active resonance damper, are shown.