Surge arresters for insulation coordination in UHV power systems—related problems and solutions

2012 ◽  
Vol 129 (5) ◽  
pp. 326-331 ◽  
Author(s):  
Volker Hinrichsen ◽  
Maximilian Nikolaus Tuczek
Keyword(s):  
Power Systems ◽  
Surge Arresters ◽  
Problems And Solutions ◽  
Insulation Coordination

Lightning Protection of Substations and the Effects of the Frequency-Dependent Surge Impedance of Transformers

2013 ◽  
pp. 398-437
Author(s):  
Rafal Tarko ◽  
Wieslaw Nowak
Keyword(s):  
Power Systems ◽  
High Voltage ◽  
Power Transmission ◽  
Electrical Power ◽  
Computer Calculation ◽  
Electrical Power Systems ◽  
Surge Arresters ◽  
Phase Conductors ◽  
Extra High Voltage ◽  
Economic Nature

The reliability of electrical power transmission and distribution depends upon the progress in the insulation coordination, which results both from the improvement of overvoltage protection methods and new constructions of electrical power devices, and from the development of the surge exposures identification, affecting the insulating system. Owing to the technical, exploitation, and economic nature, the overvoltage risk in high and extra high voltage electrical power systems has been rarely investigated, and therefore the theoretical methods of analysis are intensely developed. This especially applies to lightning overvoltages, which are analyzed using mathematical modeling and computer calculation techniques. The chapter is dedicated to the problems of voltage transients generated by lightning overvoltages in high and extra high voltage electrical power systems. Such models of electrical power lines and substations in the conditions of lightning overvoltages enable the analysis of surge risks, being a result of direct lightning strokes to the tower, ground, and phase conductors. Those models also account for the impulse electric strength of the external insulation. On the basis of mathematical models, the results of numerical simulation of overvoltage risk in selected electrical power systems have been presented. Those examples also cover optimization of the surge arresters location in electrical power substations.

Temporary overvoltage capability of surge arresters for 1000 kV power systems

1996 ◽  
Vol 117 (3) ◽  
pp. 15-24 ◽  
Author(s):  
Yasuhiko Nakada ◽  
Seiichi Yamada ◽  
Kazuya Oishi ◽  
Shingo Shirakawa
Keyword(s):  
Power Systems ◽  
Surge Arresters

scholarly journals Review of Surge Arresters for Power Systems and Transition of their Standards

2004 ◽  
Vol 124 (8) ◽  
pp. 661-668 ◽  
Author(s):  
Shingo Shirakawa ◽  
Soji Kojima
Keyword(s):  
Power Systems ◽  
Surge Arresters

Z-Transform Models for the Analysis of Electromagnetic Transients in Transformers and Rotating Machines Windings

2013 ◽  
pp. 343-375
Author(s):  
Charles Su
Keyword(s):  
Power Systems ◽  
Electrical Power ◽  
Low Frequency ◽  
Wide Frequency Range ◽  
Electromagnetic Transients ◽  
Electrical Power Systems ◽  
Leakage Inductance ◽  
Stator Windings ◽  
Conventional Models ◽  
Insulation Coordination

High voltage power equipment with winding structures such as transformers, HV motors, and generators are important for the analysis of high frequency electromagnetic transients in electrical power systems. Conventional models of such equipment, for example the leakage inductance model, are only suitable for low frequency transients. A Z-transform model has been developed to simulate transformer, HV motor, and generator stator windings at higher frequencies. The new model covers a wide frequency range, which is more accurate and meaningful. It has many applications such as lightning protection and insulation coordination of substations and the circuit design of impulse voltage generator for transformer tests. The model can easily be implemented in EMTP programs.

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