FIELD: electricity.
SUBSTANCE: at the preliminary stage, a complete line model is created in a three-phase form, taking into account the mutual inductive and capacitive couplings between the line wires. In the event of a short circuit, the values of the complex phase voltages in the buses and the phase currents in the line are measured and recorded. Further, the line model is divided into equal parts, for example from the support to the support, voltages are generated at the end of each section in each phase, starting from the buses at one and the other end of the line, currents are generated at the end of each section in each phase, starting from the buses at one and the other end of the line, phase voltage modules are recorded at the end of each section in each phase, starting from the buses at one or the other end of the line. Graphs are plotted, according to the voltage modules, with axes on both sides of the dependency of the voltage modules on the part number (on the distance). The intersection point of the graphs at one and the other end of the line corresponds to the short-circuit location. The proposed method also makes it possible to determine the location of a short circuit in other types of closure: two-phase, ground two-phase, three-phase. It also provides for the transposition of the line. In this case, you do not need to synchronize the measurements at the ends of the line.
EFFECT: reducing labor intensity and increasing accuracy in determining the location of a short circuit due to more complete consideration of line parameters.
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