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The proposed ICCT-controlled DSTATCOM-BESS configuration is illustrated in Figure 4.2. This system is composed of various components such as a three-phase voltage source converter, energy storage device, ripple filter, and specific controller. The application of the proposed system is best suited for rural areas, where loads are unpredictable [23].

 Three-phase VSC: The VSC is the core component of the D-STATCOM. During an abnormal condition, the VSC generates compensating current to support the voltage at the PCC under load unbalancing and provides reactive power compensation during a nonlinear load connection.

 Energy storage: A Conventional STATCOM has only a DC-link capacitor for supporting the reactive power. However, the requirement for active and reactive power at a coupling point is frequent, while an unbalanced nonlinear load is connected. Hence, the DSTATCOM-BESS configuration is introduced for maintaining the DC-link voltage.

 Filter: A small rating of the capacitive filter is introduced at the PCC for mitigating the ripples from the signals.

 Controller: The proposed ICCT control algorithm estimates the gating signals for the accurate output voltage of the DSTATCOM-BESS. Also, the proposed algorithm has proved to be the best-suited control algorithm for power quality mitigation applications.

Figure 4.2 System scheme of D-STATCOM with BESS.