The Implementation of Dynamic Rating and Transmission Line Protection Function in IED

Abstract

The idea of dynamic rating system to maximize the use of existing facilities is effective for solving the lack of transmission line vacant capacity that prevents a large amount of dispersed generations from connecting power grids. Such system requires a new arithmetic device for implementing the complicated formula to calculate the current capacity together with the overload protection device for transmission line. This paper considers the implementation of a dynamic rating system and a transmission line overload protection using one Intelligent Electronic Device (IED) and contrives a formula for calculating the current capacity that can be implemented in IED. It also shows the result of implementation of the proposed capacity calculation formula and transmission line protection.