# Simulation

Simulation of electrical networks and relay protection, analysis of the protection.

## Phase Coordinates Method: Short Curcuit Model

In the phase coordinate method for modeling damage in the power line, the corresponding damage model is used with its transmission matrix. The damage model is composed of a set of active resistances.

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## Phase Coordinates Method: Power Line Model

In almost any simulated circuit there is a power line. The phase coordinate method allows you to simulate the power line, including with distributed parameters, taking into account the longitudinal active and capacitive conductivity.

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## Phase Coordinates Method: Equivalent Power System Model

The part of the network diagram, about which only general parameters are known, is modeled using an equivalent power system. In the phase coordinate method, the equivalent power system is modeled by the resistances in the direct and zero sequence and by the voltage source.

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## Phase Coordinates Method: An Example of Calculating a Transfer Matrix

Calculation of transfer matrices of multipoles of various shapes is quite simple. Transfer matrices are a mathematical description of the circuit under consideration, which defines the relationship between the input quantities and the output values of the multipole.

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