Adaptive Sliding Mode Control of Single-Phase Shunt Active Power Filter

Figure 3

Equivalent circuit of APF (a) equivalent circuit when 0<𝑡<𝐷𝑇_𝑆 and (b) equivalent circuit when 𝐷𝑇_𝑆<𝑡<𝑇_𝑆.

(a)

(b)