An implementation of an enhanced DG primary control equipped with fault detection scheme

Figures & data

Figure 1. Model representation of the proposed network.

Figure 2. Three-phase inverter and its control structure.

Figure 3. Turn-off mode and V/f control mode of the three-phase inverter.

Figure 4. Switch operation and fault detection scheme representation.

Figure 5. Rotating reference frame.

Table 1. Model parameters.

Grid	DG	Line	Load
$R=5m\mathrm{\Omega }$ $L=1mH$	$R=1m\mathrm{\Omega }$ $L=0.6mH$	$R=0.15\mathrm{\Omega }$ $L=0.8mH$	$P=5kW$ $Q=0$

Figure 6. Active/reactive power, voltage and frequency at the DG bus during normal operating conditions.

Figure 7. Active/reactive power, voltage and current at PCC during normal operating conditions.

Figure 8. Active/reactive power, voltage and frequency at DG bus during switch-off mode.

Figure 9. Active/reactive power, current and trip signal at PCC during switch-off mode.

Figure 10. Active/reactive power, voltage, frequency and trip signal at DG bus during V/f control mode.

Figure 11. Active/reactive power, current at PCC during V/f control mode.