scholarly journals APPLICATION OF RELAY PROTECTION SYSTEMS IN SHIP POWER COMPLEXES

2021 ◽  
Vol 13 (6) ◽  
pp. 908-915
Author(s):  
Aleksandr S. Bordyug ◽  
Keyword(s):  
Relay Protection ◽  
Protection Systems

scholarly journals Power supply risk assessment method for relay protection system faults

2016 ◽  
Vol 65 (4) ◽  
pp. 803-814
Author(s):  
Si Tuyou ◽  
Wu Jiekang ◽  
Yuan Weideng ◽  
Du Anan
Keyword(s):  
Power Supply ◽  
Distribution Systems ◽  
Probability Model ◽  
Relay Protection ◽  
Assessment Method ◽  
Protection System ◽  
Supply Risk ◽  
Load Power ◽  
Risk Assessment Method ◽  
Protection Systems

Abstract The influence and the potential risk due to hidden faults of a relay protection system on power supply in distribution systems are paid more and more attention to. A probability analysis method is used to analyse fault characteristics and action mechanism of dominant faults, hidden misoperation and non-operation of the relay protection systems, and failure probability model of relay protection system is constructed and simplified. The effects of dominant faults, hidden misoperation and non-operation of the relay protection systems on the reduced power supply load power are analysed, and a probabilistic model for reduced power supply load power is constructed by three parts corresponding to dominant faults, hidden misoperation and non-operation. A probability calculation method of power supply risk occurrence due to hidden faults of relay protecttion system is proposed considering the fault probability of the relay protection systems, the frequency of the hidden faults occurring in operation period, the reduced power supply load power or load power outage, and the connection mode of the in-lines, out-lines and transformers in a substation. The feasibility and applicability of the proposed method for estimation of risk value probability of the relay protection systems is verified by two studied examples.

scholarly journals Modeling and Analysis of Incorrect Actions of Relay Protection Systems Based on Fault Trees

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 114571-114579
Author(s):  
Qian Chen ◽  
Lie Zhang ◽  
Peng Guo ◽  
Hanfang Zhang ◽  
Mingwei Tian ◽  
...  
Keyword(s):  
Relay Protection ◽  
Fault Trees ◽  
Modeling And Analysis ◽  
Protection Systems

scholarly journals The Analysis of the Power Supply System Reliability with Relay Protection Fail-Safe Features

2020 ◽  
Vol 26 (4) ◽  
pp. 564-570
Author(s):  
V. I. Zatsepina ◽  
◽  
S. S. Astanin ◽  
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Relay Protection ◽  
Supply System ◽  
Design Stage ◽  
Mathematical Expressions ◽  
Automation Systems ◽  
Protection Systems ◽  
Protection Devices ◽  
Fail Safe

The problem of reliability of relay protection systems and automation is considered. Based on the analysis results, for the construction of automation systems, a number of mathematical expressions have been proposed that allow at the design stage to assess the fault tolerance of the power supply system with the selected protection devices, thereby simplifying the process of choosing the most preferred system based on the obtained indicators.

scholarly journals Verification of a Novel Method of Detecting Faults in Medium-Voltage Systems with Covered Conductors

2017 ◽  
Vol 24 (2) ◽  
pp. 277-288 ◽  
Author(s):  
Stanislav Mišák ◽  
Štefan Hamacek ◽  
Mikołaj Bartłomiejczyk
Keyword(s):  
Relay Protection ◽  
Overhead Lines ◽  
Medium Voltage ◽  
New Methods ◽  
Protection Systems ◽  
Novel Method ◽  
Covered Conductors ◽  
Tree Branch ◽  
New System ◽  
Three Phases

AbstractThis paper describes the use of new methods of detecting faults in medium-voltage overhead lines built of covered conductors. The methods mainly address such faults as falling of a conductor, contacting a conductor with a tree branch, or falling a tree branch across three phases of a medium-voltage conductor. These faults cannot be detected by current digital relay protection systems. Therefore, a new system that can detect the above mentioned faults was developed. After having tested its operation, the system has already been implemented to protect mediumvoltage overhead lines built of covered conductors.

scholarly journals Relay protection system of transmission line based on AI

PLoS ONE ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. e0246403
Author(s):  
Xiangyu Zheng ◽  
Rong Jia ◽  
Linling Gong ◽  
Aisikaer ◽  
Xiping Ma ◽  
...  
Keyword(s):  
Artificial Intelligence ◽  
Power Systems ◽  
High Reliability ◽  
Relay Protection ◽  
Protection System ◽  
Test Results ◽  
Protection Systems ◽  
Protection Technology ◽  
Self Learning ◽  
The Ideal

With the development of modern power systems, higher requirements are imposed on relay protection technology. Traditional relay protection and fault diagnosis technologies have been unable to meet the requirements of the continuous development of power systems, and relay protection systems based on artificial intelligence(AI) technology have received increasing attention. Therefore, this document first analyses the weaknesses of traditional broadcast line protection and uses the adaptability and self-learning of artificial intelligence(AI); to propose the concept of protection of a relay line based on AI. In combination with the artificial nervous network, the AI-based relay protection system shall be studied and the experimental model shall be developed. This paper validates it with simulation experiments. The research results show that for the analysis of the ANN test results of the subnetwork, the actual output of the subnetwork is very close to the ideal output, and the error does not exceed 0.2%. The system has good performance and high reliability.

Defect Prediction of Relay Protection Systems Based on LSSVM-BNDT

2021 ◽  
Vol 17 (1) ◽  
pp. 710-719
Author(s):  
Yongtian Jia ◽  
Liming Ying ◽  
Donghui Wang ◽  
Jie Zhang
Keyword(s):  
Relay Protection ◽  
Defect Prediction ◽  
Protection Systems
Sign in / Sign up

Export Citation Format

Share Document