scholarly journals Determining alpha plane characteristics of line current differential protection in two-terminal high voltage transmission with different current transformer ratio

2021 ◽  
pp. 191-202
Author(s):  
Aldo Bona Hasudungan ◽  
Agus Indarto ◽  
Iwa Garniwa ◽  
Chairul Hudaya
Keyword(s):  
High Voltage ◽  
Current Transformer ◽  
Differential Protection ◽  
Line Current ◽  
Current Differential Protection ◽  
High Voltage Transmission ◽  
Transformer Ratio

The Analysis and Discussion of the Actual Case about the Differential Protection Malfunction Caused by the Transient Exciting Current of Large-Scale High-Voltage Main Transformer at the Time of Switching

2013 ◽  
Vol 694-697 ◽  
pp. 785-789
Author(s):  
Yang Gao ◽  
Guo Yan Liang
Keyword(s):  
High Voltage ◽  
Large Scale ◽  
Current Transformer ◽  
Differential Protection ◽  
Instrument Function ◽  
Actual Case ◽  
Test Analysis ◽  
Use Of Data ◽  
Exciting Current ◽  
Transformer Differential Protection

In this paper, based on the choice of voltage level 500kV for large transformer differential protection of maloperation accident actually as an example, discusses how to improve the reliability and the transformer differential protection with the relationship between pressure test. Analysis found that in order to avoid the excitation transient exciting current transformer differential protection sparked the misoperation, on-site technical personnel in the differential protection setting calculation process, make use of data in conformity with the relevant parameters, rules and standards, familiar with differential protection, also need to understand the characteristics of transformer excitation transient exciting current high-voltage tests, the influence of characteristic more should fully exert the modern PC wave record device, instrument function can improve the actual effect of transformer differential protection. This factory for transformer differential protection for setting, protection greatly improves the reliability. This experience is worth popularizing.

scholarly journals The Communication System and its Impacts on Line Current Differential Protection in Distributed Feeder Automation

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1298
Author(s):  
Yilong Duan ◽  
Longfu Luo ◽  
Yong Li ◽  
Yijia Cao
Keyword(s):  
Communication System ◽  
Design Method ◽  
Parameter Determination ◽  
Differential Protection ◽  
Feeder Automation ◽  
Communication Mode ◽  
Line Current ◽  
Current Differential Protection ◽  
On Line ◽  
The Impact

As one of the core technologies of distributed feeder automation (DFA), line current differential protection (LCDP) can locate faults quickly and accurately and have the ability to cope with multi-directional flow. However, LCDP algorithm has high requirements for communication speed, and is sensitive to communication quality. In order to apply the LCDP algorithm to a real project, the communication system and its impacts on LCDP need to be studied in depth. In this paper, the design method of a communication system for LCDP, including communication mode, topology, communication protocol, and synchronization, is analyzed in detail. For better parameter determination, the communication models are investigated, and the impact of time delay, data loss, and jitter on LCDP are discussed. Further, the distribution network based on a real project is built in a cyber-physical co-simulation environment, and the impact of electrical fails and communication fails on LCDP are studied. The results show that the design method and parameters determination method proposed in this paper are effective.

scholarly journals Investigating the impact of network security on the line current differential protection system

2018 ◽  
Vol 2018 (15) ◽  
pp. 1199-1203
Author(s):  
Andreas Aichhorn ◽  
Andreas Unterweger ◽  
René Mayrhofer ◽  
Dominik Engel
Keyword(s):  
Network Security ◽  
Protection System ◽  
Differential Protection ◽  
Line Current ◽  
Current Differential Protection ◽  
The Impact
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