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A Review on fast Protection of Multi-Terminal hvdc system based on Transient signal detection

Rajlaxmi Manu, Raghvendra Singh

Abstract


It is commonly known that one way to connect renewable energy resources to the main electrical grid is through the use of HVDC technologies. Power conversion is substantially more efficient when the newest modular multi-level converter (MMC) is used. DC fault currents can quickly increase to exceedingly high levels due to the relatively low impedance in a DC system, which can be quite harmful for HVDC converters. Security and sustainability in the transmission of power are being enhanced by the development of protective measures for HVDC networks. They do, however, have a number of shortcomings with regard to defect signal identification and prompt clearance. In order to solve those shortcomings, the protection mechanism proposed in this work offers a quick and dependable fix. To identify sudden transient signals, a protective mechanism based on travelling wave simulation and analysis is suggested. The method has minimal sampling frequency needs and exhibits great selectivity, efficiency, and dependability. Using a cyber-physical simulation platform built with an IEC 61850 communication link and a real-time digital simulator (RTDS), the suggested protective strategy has been verified. The obtained results indicate that there is good potential for practical applications of the suggested approach.


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References


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