Evaluation of Short Circuit Currents in Networks with Low Voltage Ride Through (LVRT) Enabled Voltage Source Converters (VSC) based Wind Turbines

Gautam, PVP and Joseph, FC (2019) Evaluation of Short Circuit Currents in Networks with Low Voltage Ride Through (LVRT) Enabled Voltage Source Converters (VSC) based Wind Turbines. In: 20th National Power Systems Conference, NPSC 2018, 14 - 16 December 2018, Tiruchirappalli.

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Abstract

Rapid depletion of the conventional energy sources has been a driving factor in the phenomenal advancements of renewable energy systems. Bulk integration of such renewable energy sources has given rise to a new dimension to various classical power system analysis problems impacting the system which need to be analysed before grid integration. Wind turbine systems, which are widely used along with the solar PV systems, are majorly power electronically controlled equipment. They possess the capability of connectivity in the system during faults along with Low Voltage Ride Through(LVRT) characteristics for supporting the voltage profile of the system. These current injections lead to the problem of fault analysis becoming non linear and calculation extensive for various time domain simulations. This paper presents an extension of the concept of classical fault analysis to form 'Fault Coefficients' which are used along with Newton Raphson technique, to find current contributions of Voltage Source Converter (VSC) based wind turbines for all types of symmetrical and asymmetrical faults. The approach can be used even for very large networks, as the sparsity of the system is maintained in this approach.

Item Type:	Conference Paper
Publication:	2018 20th National Power Systems Conference, NPSC 2018
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Power converters; Renewable energy resources; Timing circuits; Wind turbines, Asymmetrical Fault Studies; Conventional energy sources; LVRT; Newton-Raphson techniques; Renewable energy systems; Symmetrical fault; Voltage source converters; Wind generator systems, Time domain analysis
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	04 Aug 2022 05:46
Last Modified:	04 Aug 2022 05:46
URI:	https://eprints.iisc.ac.in/id/eprint/75107

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