When the grounding resistance is 100 Ω, it can be seen from Figure 13 (a1) and (a2) that the effective value of the fundamental wave of the fault voltage is 67.08 V after the fault occurs, and the effective value of the fundamental wave of the fault current is 667.8 mA.
The effects of a fixed capacitor-bank and an SVC have been analyzed regarding their benefits to an uncompensated power supply system. The input data of the conducted simulation model had been taken from an experimental measurement in the Electrical Machines Laboratory of VIT University Vellore (India).
The measured data shows good agreement with the calculated one, verifying the correctness and accuracy of the proposed method. It is recommended that the reactive power compensation can be applied for a shorter time because the source current enhances substantially as the capacitance is connected to the load.
Further as load 2 turns on, capacitor bank 2 also turns on along with 1 to provide compensate the dip in the power factor. Therefore, when both the loads are switched in the circuit, all the capacitor banks are active thus providing full compensation to the system and correcting the power factor to 1.
The control system connects the capacitors to the load and continues this connection until the voltage remains within the allowable limits. If load voltage again changes from the nominal range, the system recalculates the required capacitance according to present circumstances and connects the required capacitance.
After the grounding fault occurs, the ASC immediately compensated the fault current, and the RMS values of residual voltage and residual current is 89.66 V and 0.897 A, respectively. After the proposed topology is connected, the RMS values of residual voltage and residual current drop to 9.5 V and 0.095 A, respectively.
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