Distribute Coordinated Wide Area Current Differential Protection Based on IEC61850

2006 ◽  
Author(s):  
Su Sheng ◽  
K.K. Li ◽  
Zeng Xiangjun
Keyword(s):  
Wide Area ◽  
Differential Protection ◽  
Current Differential Protection

Wide-Area Backup Protection Algorithm Based on Earth Impedance Comparison Principle

2014 ◽  
Vol 513-517 ◽  
pp. 858-862
Author(s):  
Zhen Xing Li ◽  
Qiu Li ◽  
Tao Zhang
Keyword(s):  
Area Measurement ◽  
Wide Area ◽  
Differential Protection ◽  
Circuit Breakers ◽  
Backup Protection ◽  
Wide Area Measurement System ◽  
Component Identification ◽  
Current Differential Protection ◽  
Protective Relays ◽  
Bus Voltage

A novel algorithm is proposed for the purpose of improving the reliability and sensibility of fault component identification of wide area backup protection. The algorithm, called earth impedance comparison protection (EICP), is realized by comparing the ratios of different nodes, and the ratio is obtained by the bus voltage to the differential current. The advantages of EICP are verified in this paper using the measurement function of wide-area measurement system. The results of case studies show that EICP is superior to the current differential protection in terms of the sensitivity and to the directional pilot protection in terms of the dependability. The satisfactory results can be obtained when the EICP method is applied in the event of abnormal operations of protective relays and circuit breakers, measurement error scenarios or substation DC failure.

Adaptive Agent-Based Wide-Area Current Differential Protection System

2010 ◽  
Vol 46 (5) ◽  
pp. 2111-2117 ◽  
Author(s):  
Su Sheng ◽  
K. K. Li ◽  
W. L. Chan ◽  
Xiangjun Zeng ◽  
Dongyuan Shi ◽  
...  
Keyword(s):  
Protection System ◽  
Wide Area ◽  
Differential Protection ◽  
Agent Based ◽  
Adaptive Agent ◽  
Current Differential Protection
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