A new method using the bus-impedance matrix model for short-circuit calculations

The short-circuit impedance of converter transformers is one of the most important specifications in HVDC system. Compared with the traditional converter transformers, the new converter transformer has unique windings connection diagrams. Based on the topological structure of the new converter transformer, this paper proposes a new method to establish the mathematical relationship of short-circuit impedances and filters impedances under considering the valve side and grid side shortcircuit conditions. The analysis on short circuit at valve side and grid side shows that short-circuit impedances values are almost the same in both two conditions, so that the impedance of the new converter transformer is symmetrical. Finally, simulation and experimental results verify the correctness of the theoretical analysis.

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A Passive analytical per-unit-length internal impedance matrix model for multiconductor interconnections

2011 IEEE International Symposium on Electromagnetic Compatibility ◽

10.1109/isemc.2011.6038432 ◽

2011 ◽

Cited By ~ 2

Author(s):

Frederic Broyde ◽

Evelyne Clavelier

Keyword(s):

Matrix Model ◽

Unit Length ◽

Impedance Matrix ◽

Internal Impedance

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A discussion of an analytical per-unit-length impedance matrix model

2012 IEEE 21st Conference on Electrical Performance of Electronic Packaging and Systems ◽

10.1109/epeps.2012.6457855 ◽

2012 ◽

Cited By ~ 1

Author(s):

Frederic Broyde ◽

Evelyne Clavelier ◽

Daniel De Zutter ◽

Dries Vande Ginste

Keyword(s):

Matrix Model ◽

Unit Length ◽

Impedance Matrix

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A new method of analyzing the short-circuit current of silicon solar cells

IEEE Transactions on Electron Devices ◽

10.1109/t-ed.1980.19951 ◽

1980 ◽

Vol 27 (4) ◽

pp. 883-885 ◽

Cited By ~ 12

Author(s):

H.C. Hsieh ◽

C. Hu ◽

C.I. Drowley

Keyword(s):

Solar Cells ◽

Short Circuit ◽

Short Circuit Current ◽

New Method ◽

Silicon Solar Cells

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A new method to detect the short circuit current in DC supply system based on the flexible Rogowski coil

2011 1st International Conference on Electric Power Equipment - Switching Technology ◽

10.1109/icepe-st.2011.6122978 ◽

2011 ◽

Cited By ~ 2

Author(s):

Yan Wang ◽

Xiaoshe Zhai ◽

Zhengxiang Song ◽

Yingsan Geng

Keyword(s):

Short Circuit ◽

Short Circuit Current ◽

Rogowski Coil ◽

Supply System ◽

New Method

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A New Fault-Positions Method Based on Interpolation for the Area of Vulnerability to Voltage Sags

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.325-326.681 ◽

2013 ◽

Vol 325-326 ◽

pp. 681-686

Author(s):

Shuang Ya Zhou ◽

Shun Tao ◽

Xiang Ning Xiao ◽

Chao Luo ◽

Xiao Chen Zhen

Keyword(s):

Power System ◽

Short Circuit ◽

New Method ◽

Voltage Sag ◽

Voltage Sags ◽

Regional Power ◽

Short Circuit Calculation ◽

Point Of Common Coupling ◽

Transformer Winding ◽

Common Coupling

The area of vulnerability (AOV) of point of common coupling (PCC) can directly reflect the issue of voltage sag caused by faults in power system. In order to calculate the area of vulnerability more accurately and faster, this paper proposes a new fault positions method based on interpolation, which overcomes the blindness of setting fault points. The influence of transformer winding connections on voltage sag is also taken into account. Short-circuit calculation is adopted and transfer matrix representing the transfer law of transformer on voltage sag is deduced firstly. Then, the principle and implementation flow of the new method are presented in detail. Finally, the new method is applied to a regional power system of China, and graphic result of the area of vulnerability is displayed under balanced and unbalanced faults.

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