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. Measuring and recording the values of the complex stresses of the cables on the tires and currents in the line cables. Further, the line model is divided into equal parts, for example, from the support to the support, alternating the stresses at the end of each section in each phase and the cable, starting from the buses at one and the other ends of the line, thereby forming currents at the end of each section in each phase and cable, isolating the phase voltage modules at the end of each section, starting from the buses from one and the other ends 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.
EFFECT: increased accuracy of determining the short-circuit location by complete record-keeping of the longitudinal and transverse parameters of a multi-wire power line with cables grounded on the anchor supports, while using unsynchronized measurements at the ends of the line.
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