A Wide-Area Backup Protection Algorithm for Multi-Fault Location in Complex Large Power Grid

2014 ◽  
Vol 960-961 ◽  
pp. 836-840 ◽  
Author(s):  
Bing Yang Xia ◽  
Jing Ma
Keyword(s):  
Fault Location ◽  
Fault Injection ◽  
Power Grid ◽  
Injection Current ◽  
Wide Area ◽  
Equivalent Model ◽  
Large Power ◽  
Multiple Faults ◽  
Backup Protection ◽  
Location Algorithm

This paper presents a fitting degree-based multi-fault location algorithm for complex large power grid utilizing wide-area information. Firstly, fault injection current of the equivalent fault points is used in the equivalent model. Then the correlation matrix is formed by the network topology and associated nodal injection current and a network is formed to determine the location of faults. When multiple faults occur, the addition of the current of each two fault lines is calculated and the real-time current is measured. Then by calculating the minimum of fitting degree between two current values, fault line and virtual fault location can be determined. The simulation results of 10-generator 39-bus system verify the validity and feasibility of this algorithm.

An Improved Wide Area Travelling Wave Fault Location Algorithm

2012 ◽  
Vol 241-244 ◽  
pp. 373-378
Author(s):  
Yu Chen ◽  
Dong Liu ◽  
Bing Yin Xu
Keyword(s):  
Traveling Wave ◽  
Fault Location ◽  
Travelling Wave ◽  
Wide Area ◽  
The Real ◽  
Counter Example ◽  
Location Algorithm

In order to enhance the reliability of traveling wave fault location (TWFL) systems, an improved wide area traveling wave fault location (WA-TWFL) algorithms is presented in this paper. In the disturbance area that near to the fault position, we can first get the possible fault positions by using the outgoing path data from the substation that first records the initial traveling wave, then use the possible fault position to verify the reasonableness of data recorded. The fault position that has no counter-example in logical is the real fault position. EMTP simulation verifies the validity and applicability of this algorithm.

Study on wide-area traveling wave fault line selection and fault location algorithm

2018 ◽  
Vol 28 (12) ◽  
pp. e2632 ◽  
Author(s):  
Zhenxing Li ◽  
Yixing Cheng ◽  
Xin Wang ◽  
Zhenhua Li ◽  
Hanli Weng
Keyword(s):  
Traveling Wave ◽  
Fault Location ◽  
Wide Area ◽  
Fault Line ◽  
Fault Line Selection ◽  
Line Selection ◽  
Location Algorithm

Fault Location Method Based on Wide-Area Voltage

2013 ◽  
Vol 860-863 ◽  
pp. 2077-2082
Author(s):  
Yan Xu ◽  
Lu Man Ying ◽  
Jing Zhi ◽  
Ren Qing Feng
Keyword(s):  
Power System ◽  
Fault Location ◽  
Wide Area ◽  
Mathematical Methods ◽  
Wide Area Protection ◽  
Backup Protection ◽  
Fuzzy Clustering Analysis ◽  
Fast Classification ◽  
First Time

Backup protection chain tripping caused by flow transferring is one of the most concerned issues in power system. The introduction of wide area backup protection is an effective way to solve the problem. However, in wide area protection system, an effective fault location puts forward a high demand for the location algorithm. This paper presented a method which combined effective mathematical methods with fault location calculation in power system together: firstly used fuzzy clustering analysis method for fast classification of voltage, locked the fault area, and prevented the occurrence of even jump accident at the first time. Then determined the fault location by calculating additional nodal current ratio in the fault area. The method avoids the repeated modification of network structure after fault. It lock the fault to the component quickly and improves the efficiency of fault location greatly.

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