3.2.1. NETWORK Module

The network module consists of two blocks: SUPPLY and CONTROL of 3.ph, 2.ph, 1.ph SHORT CIRCUIT. The first block include ideal 3-phase voltage source of nominal voltage 15 kV and 15/0.4 kV distribution transformer supplying LV busbars (SUPPLY). The second allow the emulation of different, asymmetrical faults in the network and illustrate their effects at the point of coupling with end-user installation. The beginning and duration of each fault can be set using Time Fault Logic blocks.

## 3.2.2. EV OWNER INSTALLATION Module

User installation module is represented by R, L load block (LOAD), which through a BR switch is connected to the transformer LV busbars. The value of load impedance can be changed with constant tgϕ. The EVSE terminal has electrical and control circuits. The CNT switch is controlled by the EVSE CTRL block.

The BR switch is controlled by the BRAKER CTRL block. In this block the supplying network voltage vector *vn* is monitored and if the voltage exceeds permissible values, the switch is opened. The controller can close the breaker only when the voltage vectors *vn* and *vh*, on both sides of the switch, expressed by Equations (1) and (2), fulfil the synchronization requirements.

$$
\sigma\_h = V\_h e^{j(\omega\_h t + \varphi\_h)} \tag{1}
$$

$$
\sigma\_n = V\_n e^{j(\omega\_n t + \varphi\_n)} \tag{2}
$$

where:

*vh*, *Vh*, ω*h*, ϕ*h*—instantaneous value, module, angular velocity and phase angle of voltage vector in end-user (home) installation in α, β coordinates.

*vn*, *Vn*, ω*n*, ϕ*n*—instantaneous value, module, angular velocity and phase angle of supplying network voltage vector in α, β coordinates.
