Non-directional Overcurrent Protection Relay Testing Using Virtual Hardware-in-the-Loop Device

Abstract

Protective relays are an integral part of the power grid, making it reliable and secure against abnormal conditions. Hardware-in-the-Loop (HIL) can be employed to test and validate digital protective relay devices in the real-time simulation comprising hardware and software before actual implementation. However, the HIL technique requires a complex and high-cost technical environment consisting of hardware devices, sensors, communication, and simulation platforms. The Virtual HIL (VHIL) Device is a new real-time simulation approach to offer the entire experience and challenges coming from the actual implementation of HIL. It allows the users to approach the possibility of learning the principles and techniques used in HIL without any concern related to using real hardware or physical devices. This chapter aims to illustrate the use of the model-based system engineering toolchains of Typhoon HIL for understanding the implementation methodology of the VHIL technique, from creating a testing model to the process of running. A modified version of the well-known three-phase radial feeder of the European MV distribution benchmark system created by CIGRE Task Force C6.04.02 is modelled and simulated for evaluating non-directional overcurrent protective relay performance through multiple short-circuit fault scenarios. The main contribution of this chapter is to systematically introduce the modelling and simulation for testing purposes of the non-directional overcurrent protection relay in VHIL that helps power engineers evaluate the protective relay settings under more realistic conditions.