Serdyukov R. Improved methods of protection and limitation of overvoltages in networks 6-10 kV for the closure phase to earth

Object - processes in electric networks 6-10 kV single-phase short circuits on the ground. Purpose - to increase reliability of functioning of networks 6-10 kV single-phase short circuits on the ground due to surge suppression and increase the sensitivity of relay protection. Methods of the theory of transient processes in transformers and electric machines of alternating current and relay protection of electrical networks, methods of mathematical modeling and numerical solution of nonlinear systems of algebraic and differential equations. For the first time, a combined method of limiting overvoltage at single-phase short circuits on the ground, in which the exceptions to the escalation of tensions reached with the help of controlled low voltage resistance neutral grounding in simultaneous reduction of time of validity of arcing due to bypass damaged phase. Results of the thesis are recommended to use the design and operational organizations, for the calculation and research of transients in circuits of 6-10 kV own needs TPP, industrial enterprises and urban networks in the justification of the operational parameters of the technical means to limit the amount and duration of overvoltage and improvement of relay protection from single-phase ground short circuit. The branch of using - electrical.