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The National Academy of Sciences of Ukraine

The Institute of Electrodynamics

About Institute



V.V. Kuchanskyy
Institute of Electrodynamics of the National Academy of Sciences of Ukraine,
Peremohy, 56, Kyiv-57, 03680, Ukraine,
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The long time resonance overvoltages arising through resonance of current, due to coincidence of the range parameters in open-phase modes. This type of overvoltages caused by the network properties and can be removed by changing the ratio between its network parameters. Unlike switching overvoltages that last few hundredths of second, resonance overvoltages not only arise unexpectedly, but there may exist a long time until the effect of increasing voltage protection, voltage regulators or intervention personnel do not perform schema changes or regime. Resonance overvoltages not taken into account when selecting insulation or surge protection devices as these protective measures calculated to limit switching overvoltages, not to extinguish a long process. Therefore, the probability of accidents and development system failure in the resonance overvoltages is considerable. Thus the improvement of analytical methods and developing appropriate simulation and mathematical models to study the resonance overvoltages in their occurrence, development and existence, the solution of which is devoted this work, there is an actual scientific and practical problem. The paper also discussed the application of the developed methods and models to identify factors in electrical networks that have the greatest impact on the appearance and values of overvoltages, also selecting means of preventing and limiting this kind of overvoltages. References 7, figures 5, tables 2.
Key words: open phase mode, resonance overvoltages, shunt reactor, simulation model.

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