2018-4(29)

Operation of nuclear industry facilities

Article NameAnalysis of Boundary Conditions of Sustainable Ferrosontic Process Flow in 24 KW Chains of Generator Voltage of NPP Power Units
AuthorsS.А. Baran, V.V. Nechitajlov, V.V. Krasnokutskij
Address

Volgodonsk Engineering Technical Institute the branch of National Research Nuclear University “MEPhI”,

Lenin St., 73/94, Volgodonsk, Rostov region, Russia 347360

1 ORCID: 0000-0002-3232-4072

WoS Researcher ID: I-7933-2018

e-mail: bastr@rambler.ru

2 ORCID: 0000-0002-6795-2458

WoS Researcher ID: J-3646-2018

e-mail: VITIkafAE@mephi.ru

3 ORCID: 0000-0002-4498-2996

WoS Researcher ID: I-4045-2018

e-mail: leronil@mail.ru

AbstractThe network generator voltage is operated using with isolated neutral, and line-to-ground fault is not short circuit. Ground-fault protection more often works on signal, but in some cases shutdown network protection occurs. Analysis of the causes of power unit shutdowns by the action of ground-fault protection showed that some of them were false and occurred as a result of the appearance of stable ferroresonance processes in the circuit. Passing of ferroresonance processes is possible at a certain ratio of the parameters of the electrical circuit. The paper deals with the boundary values of the total inductance and capacitance of the circuit, in which a stable ferroresonance process can occur in the circuit, the parameters of the equivalent circuit of the NPP power unit are calculated, the oscillograms of processes in a single-phase ground fault are considered, the resistor is selected for effective grounding of the neutral.
Keywordsferroresonance, generator voltage, isolated neutral, voltage transformer, overvoltage
LanguageRussian
References

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