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As the main protection of high voltage direct current (HVDC), the traveling wave protection is not easily affected by the resistance and capacitance of the transmission line, but there are still some shortcomings. This article not only briefly analyses some the traveling wave protection method based on wavelet transform and mathematical morphology, but also sums some non-traveling wave protection...
It is necessary to select appropriate methods of calculation and lightning protection for transmission line has characteristics such as wide distribution, long span and high lightning trip-out rate. This paper initially introduces and compares several calculation methods, then analyzes principles of some common lightning protection measures of transmission line in detail. Large quantity fact proved...
Our county distribution power network neutral point grounding modes are divided into three categories: Neutral non-earthing system, neutral-point indirect earthing system and direct neutral earthing system. Neutral-point indirect earthing system is divided into neutral grounded though a resistance and neutral grounding via arc suppression coil. This article is based on the MATLAB power system simulation...
With the development of smart grid, smart substation assumes an increasingly important role. Compared with the deficiency of traditional substation, the concept of smart substation, the key technical characteristics of smart substation, relay protection and three typical configuration types are described in this paper. The key techniques in smart substation were developed that is an inevitable trend...
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