Phase Coordinates Method: Break Model

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.

In fig. 1 shows a circuit replacement circuit. At the point of wire breakage, a large active resistance is set (R = 1010 Ohms).

phcoor8_1

Fig. 1. Break equivalent circuit

In the phase coordinate method, the break is described by the direct transfer matrix

 phcoor8_f1,

where phcoor6_f4phcoor6_f5phcoor8_f2.

Cliff modeling is performed using resistances phcoor8_f3, phcoor8_f4, phcoor8_f5. To simulate a break, for example, in phase A, the resistance is set equal to 1010 Ohms. Similarly model faults in other phases.

The attached file shows the calculation of the break matrix phcoor6_f1 in Matlab: файл A_break.m

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