Consider an example of compiling a power transmission model using the phase coordinate method. In fig. 1 shows the power transmission, a mathematical model of which must be compiled. It is necessary to determine the currents in the short circuit mode at the beginning of the line.
Some complex types of damage can occur in power lines, for example, a short circuit with a wire break. This mode can occur when a wire of any phase falls to the ground (Fig. 1).
During operation of electric power systems, not only short-circuit modes can occur, but also breaks. The phase coordinate method allows you to simulate wire breakage.
The equivalent load in phase coordinates is given by a constant active and reactive power. Based on the magnitude of the load power and voltage, a direct transfer matrix is calculated.
As a transverse load, connection of compensating devices such as shunt reactors can be considered. They are designed to compensate for reactive power in the network and to regulate voltage. This improves the quality of the transmitted electrical energy.