Simulation of 6 (10) kV electrical networks for fault location

The article considers a computer model development to simulate emergency operation in distribution networks 6 (10) kV with the selection and configuration of electrical network specific parameters. The objectives of the work is to analyze possible emergencies in the networks 6 (10) kV power grid computer model and to determine the site of the accident at the power transmission line with the account of the parameters the emergency mode. The paper outlines the principles of fault location by various methods, including taking into account the operating parameters of the electrical network and the emergency operation parameters. The equivalent circuit parameters in the longitudinal and transverse parts of the circuit, the parameters of the load and the power source are specified. The parameters of consumption and generation over the simulation time remain unchanged. The authors provide the analysis of the following alarm modes: rated load power user mode;- emergency mode single-phase metallic ground fault (SGF) to the ground; SGF emergency mode through the large transient resistance at the accident site; emergency mode of double ground fault in an accident on the two adjacent phases of the electrical network; emergency mode of the double ground fault in an accident at one phase in two places mains. The analysis of the oscillograms, the basic measures for accident registration parameters and interconnection with the distance to the point of damage to the mains. Measures for further improvement of the mathematical apparatus using wave parameters of the electrical network are outlined.