Open AccessVulnerability assessment approach for real‐time and regional monitoring of backup protections: minimising number of GPS‐based distance relays
Author(s) -
Ghanizadeh Bolandi Tohid,
Yazdaninejadi Amin
Publication year - 2020
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2019.1756
Subject(s) - backup , vulnerability (computing) , global positioning system , relay , computer science , software deployment , computer network , reliability engineering , real time computing , computer security , telecommunications , engineering , database , power (physics) , physics , quantum mechanics , operating system
Presenting an accurate and cost‐effective solution to tackle static load encroachment issues in backup protection of transmission networks stand as a challenging task. Therefore, this study aims at devising a new backup protection scheme via GPS‐based distance relays (GBDRs) against this issue. In this scheme, each GBDR calculates the vulnerability index locally, which helps to find out the vulnerable situation. When these indices exceeded their threshold, the protection centre is allowed for real‐time monitoring in the corresponding area. In this regard, after calculating superimposed components, they are sent to the protection centre for discriminating faults from stressed conditions. Deployment of GPS‐based relay in each bus brings higher costs and entails sharing large amounts of data. Therefore, a new techno‐economic approach helps for the optimal deployment of these relays. To this end, zone‐3 in some buses are eliminated, and the rest are equipped with GBDRs while each line at least is protected by two existing zones‐3. By doing so, the network is divided into different areas that are protected with the minimum number of these relays. Whereby, coupled with the vulnerability indices, minimising the number of GBDRs alleviates the exchanged data.