EPE Association: EPE 2020 - LS1c: Power Electronics in Transmission and Distribution Systems

EPE 2020 - LS1c: Power Electronics in Transmission and Distribution Systems
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2020 ECCE Europe - Conference > EPE 2020 - Topic 06: Grids, Smart Grids, AC & DC > EPE 2020 - LS1c: Power Electronics in Transmission and Distribution Systems

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   Ground Fault Active Compensation in Emulated Distribution Grid of 10 kV
By Tomas KOMRSKA [View]
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Abstract: MV distribution grids are often operated with arc suppression coils compensating dominating reactivefault current component when single-phase ground fault occurs. The paper deals with an activecompensation in emulated distribution grid of 10 kV performed by a proposed three-phase active faultcompensator, based on power semiconductor converter. It enables a complete fault currentcompensation without residual components and to address resonance-related problems.

   Impact of control loops on the low-frequency passivity properties of grid-forming converters
By Mebtu BEZA [View]
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Abstract: The aim of this paper is to evaluate the low-frequency passivity properties of grid-forming converters.Through the analysis of the frequency-dependent input admittance of the converter, the impact of various control loops is investigated. A simplified analytical model that is valid in the low-frequency range is also derived in order to identify possible control modifications to enhance the passivity of the system.

   Stability Investigation of Three-Phase Grid-Tied PV Inverters with Impedance-Based Method
By Zhiqing YANG [View]
[Download]

Abstract: This paper presents stability investigations of three-phase grid-tied photovoltaic inverter systems using the impedance-based method. Impedance models (IMs) are established considering different control loops, and passive elements. IMs with a current control in both synchronous and stationary frames are established and compared. Impacts of different control loops, filter parameters, operation point as well as the number of inverters in the system are discussed. It is possible to identify the reason of an instability with the IMs.

EPE 2020 - LS1c: Power Electronics in Transmission and Distribution Systems
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2020 ECCE Europe - Conference > EPE 2020 - Topic 06: Grids, Smart Grids, AC & DC > EPE 2020 - LS1c: Power Electronics in Transmission and Distribution Systems
	[return to parent folder]

	Ground Fault Active Compensation in Emulated Distribution Grid of 10 kV By Tomas KOMRSKA	[View] [Download]
Abstract: MV distribution grids are often operated with arc suppression coils compensating dominating reactivefault current component when single-phase ground fault occurs. The paper deals with an activecompensation in emulated distribution grid of 10 kV performed by a proposed three-phase active faultcompensator, based on power semiconductor converter. It enables a complete fault currentcompensation without residual components and to address resonance-related problems.

	Impact of control loops on the low-frequency passivity properties of grid-forming converters By Mebtu BEZA	[View] [Download]
Abstract: The aim of this paper is to evaluate the low-frequency passivity properties of grid-forming converters.Through the analysis of the frequency-dependent input admittance of the converter, the impact of various control loops is investigated. A simplified analytical model that is valid in the low-frequency range is also derived in order to identify possible control modifications to enhance the passivity of the system.

	Stability Investigation of Three-Phase Grid-Tied PV Inverters with Impedance-Based Method By Zhiqing YANG	[View] [Download]
Abstract: This paper presents stability investigations of three-phase grid-tied photovoltaic inverter systems using the impedance-based method. Impedance models (IMs) are established considering different control loops, and passive elements. IMs with a current control in both synchronous and stationary frames are established and compared. Impacts of different control loops, filter parameters, operation point as well as the number of inverters in the system are discussed. It is possible to identify the reason of an instability with the IMs.