A Structure of Transformer Protective Relay for Implementing a High-speed Operation of Many Protective Functions Using a Parallel Processing Feature of FPGA

Abstract

A protective relay plays a crucial role in the normal operation of a power system and the reliable supply of electrical power. The implementation of the modeling multi-functional hardware transformer protective relay based on a Field programmable gate array (FPGA) for a higher speed operation of protection is newly discussed in this paper. Taking the advantage of parallelism feature on FPGA, the proposed hardware transformer relay can process input signals of multi-channel with high speed, at the same time in real-time, and concurrently estimate and process different function protective logics. By using a single Altera CycloneⅢ EP3C40Q240CN8 and configuring different function protective relays, this relay allows us high-speed operation which is a basic demand of protection. This relay can operate within 1.1 cycle of the power frequency. The results demonstrate the operating speed and effectiveness of this protective relay for power transformers.