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The response of the DSTATCOM-BESS system with an unbalanced linear load is as depicted in Figure 4.12. The unbalancing in the linear load starts from 0.25 seconds to 0.5 seconds. The intention of load unbalancing (I_l) from three-phase to two-phase and then to one-phase and again reverse illustrates the proposed BESS-based system’s performance. It has been perceived that the source voltage (Vs) and current (Is) are balanced and in-phase during and after the unbalancing. The battery charging is slightly disturbed during unbalancing but maintains a continuous charge (I_bb). The whole operation compensates the current (I_c) from the DSTATCOM continuously injected while keeping the balanced terminal voltage (Vt) at its calculated reference voltage. Also the source and load side current are visualized in Figures 4.13 and 4.14.

Figure 4.12 Response of DSTATCOM-BESS under an unbalanced linear load.

Figure 4.13 Source side frequency spectrum.

Figure 4.14 Load side frequency spectrum.