Mathematical Schemes to Linearize Operating Times of Overcurrent Relays by Sequentially Fixing Plug Settings and Time Multiplier Settings

被引：0

作者：

Al-Roomi, Ali R. ^{[1
]}

El-Hawary, Mohamed E. ^{[1
]}

机构：

[1] Dalhousie Univ, Dept Elect & Comp Engn, 1459 Oxford St, Halifax, NS B3H 4R2, Canada

来源：

2020 IEEE CANADIAN CONFERENCE ON ELECTRICAL AND COMPUTER ENGINEERING (CCECE) | 2020年

关键词：

optimal relay coordination; directional overcurrent relays; time multiplier setting; plug setting; protective relays; OPTIMAL COORDINATION;

D O I：

10.1109/ccece47787.2020.9255794

中图分类号：

TP301 [理论、方法];

学科分类号：

081202 ;

摘要：

Nowadays, many studies have been presented in the literature to solve various optimal relay coordination (ORC) problems. These highly constrained nonlinear nonconvex optimization problems are commonly solved using evolutionary algorithms (EAs). For online applications, where the processing speed is very crucial, some studies suggest using different types of linear programming (LP), including simplex and interior-point methods, while others suggest hybridizing both EAs and LPs. For these approaches, the ANSI/IEEE and IEC/BS standard models used to calculate the operating times of overcurrent relays (OCRs) are linearized by just fixing their plug settings (PS) and varying time multiplier settings (TMS). This study presents another way to linearize these models by doing the opposite where TMS are fixed and PS are varied for both standard models. These linearized models can be used to effectively tune the objective functions of ORC problems to achieve both performance criteria; the solution quality and the processing speed.

引用

页数：6