Ease commissioning of a line differential scheme by sharing an Ethernet-based protection interface

2020 ◽  
Author(s):  
A. Aichhorn ◽  
M. Aumayr ◽  
T. Hensler ◽  
O. Skrbinjek ◽  
A. Lichtenegger
Keyword(s):  
Differential Scheme

scholarly journals A differential scheme for elastic properties of rocks with dry or saturated cracks

2002 ◽  
Vol 151 (2) ◽  
pp. 597-611 ◽  
Author(s):  
James G. Berryman ◽  
Steven R. Pride ◽  
Herbert F. Wang
Keyword(s):  
Elastic Properties ◽  
Differential Scheme

A differential scheme for Spatial Modulation

2013 ◽  
Author(s):  
Yuyang Bian ◽  
Miaowen Wen ◽  
Xiang Cheng ◽  
H. Vincent Poor ◽  
Bingli Jiao
Keyword(s):  
Spatial Modulation ◽  
Differential Scheme

scholarly journals A Protection Method Based on Feature Cosine and Differential Scheme for Microgrid

2019 ◽  
Vol 2019 ◽  
pp. 1-17 ◽  
Author(s):  
Lai Lei ◽  
Cong Wang ◽  
Jie Gao ◽  
Jinjin Zhao ◽  
Xiaowei Wang
Keyword(s):  
Time Domain ◽  
High Accuracy ◽  
Current Level ◽  
Fault Current ◽  
Time Domain Simulation ◽  
Overcurrent Protection ◽  
Protection Method ◽  
Islanded Mode ◽  
Differential Scheme ◽  
The Difference

The fault current level of microgrid is different between islanded mode and grid connected mode. This situation degrades the performance of traditional overcurrent protection schemes. Hence, this paper proposes a protection method based on feature cosine and differential scheme. Firstly, feature cosine is proposed; it employs ellipse equation and minimum least squares to quantify the united behavior about voltage and current. Secondly, fault current direction and feature cosine are analyzed when fault occurs at different locations of a typical microgrid, and then the difference of feature cosine between faulty and healthy section locations is obtained. Thirdly, based on feature cosine and differential scheme, the differential direction is defined and utilized to detect faulty section location. Lastly, various time domain simulation case studies, including different microgrid operation modes, grounding resistances, faulty types, faulty section locations, and noise influence, are conducted and demonstrate that the proposed protection has high accuracy.

A multiphase micromechanical model for unsaturated concrete repaired by electrochemical deposition method with the bonding effects

2018 ◽  
Vol 27 (9) ◽  
pp. 1307-1324 ◽  
Author(s):  
Qing Chen ◽  
Zhengwu Jiang ◽  
Hehua Zhu ◽  
JW Ju ◽  
Zhiguo Yan ◽  
...  
Keyword(s):  
Transition Zone ◽  
Electrochemical Deposition ◽  
Micromechanical Model ◽  
Interfacial Transition Zone ◽  
Deposition Method ◽  
Viscosity Effects ◽  
Electrochemical Deposition Method ◽  
Consistent Method ◽  
Differential Scheme ◽  
Multiphase Composite

Most concrete structures repaired by the electrochemical deposition method are not fully saturated and the healing interfaces are not always perfect in reality. To demonstrate these issues, micromechanical models are presented for unsaturated concrete repaired by electrochemical deposition method with the healing interfacial transition zone based on our latest work. The repaired unsaturated concrete is represented as a multiphase composite made up of the water, unsaturated pores, intrinsic concrete, deposition products and the healing interfacial transition zone between the latter two components. The equivalent particle, matrix and composite for repaired unsaturated concrete are obtained by modifying the differential-scheme and the generalized self-consistent method. Modifications are utilized to rationalize the differential-scheme based estimations by taking into the water (including further hydration and viscosity effects), interfacial transition zone and the shapes of the pores into considerations. Furthermore, our predictions are compared with those of the existing models and available experimental results, thus illustrating the feasibility and capability of the proposed micromechanical framework.

Differential scheme-based stochastic micromechanical framework for saturated concrete repaired by EDM

2019 ◽  
Vol 230 (12) ◽  
pp. 4287-4301 ◽  
Author(s):  
Qing Chen ◽  
Rui Ma ◽  
Zhengwu Jiang ◽  
Hehua Zhu ◽  
Haoxin Li ◽  
...  
Keyword(s):  
Saturated Concrete ◽  
Differential Scheme
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