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Power transmission lines of low voltage are rarely damaged by direct lightning strikes, because they are short in length and are protected by high objects which surround them. However, the induced voltage generated by lightning indirect strikes, can cause significant damage to the power equipment and for the control or protection circuits. The paper presents the results of computer simulation the...
Overhead and high-voltage cable lines have obtained a vast broadening nowadays in energetics. However, these types of power lines have a number of problems. Improving an insulation's durability is one of the possible solutions. In this paper, the power line of 330kV has been modeled and simulated. As an example there was selected a real electrical transmission located in the city of Saint-Petersburg,...
The article presents the results of researches of transients in 35 kV vacuum circuit breakers when interrupting load currents in particular schemes. It is shown that in some cases disconnection of load can lead to reignition in vacuum circuit breakers, followed by overvoltages, which can be dangerous for the circuit breaker and other power equipment. Moreover, transient behavior can affect the amplitude...
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