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Section 2.8 Design Examples 93
40
FIGURE 2.36 Maximum power point for varying values of l PH specifies V re{.
Plant
Controller
Photovoltaic Current
VrefM G c(s) Power circuit — generator transducer - • V(s)
FIGURE 2.37 Block diagram of feedback control system for maximum power transfer with
parameters K and p.
power point resulting in maximum power transfer. If, for example, the controller is
the proportional plus integral controller
G c(s) = K P + ^-,
the closed-loop transfer function is
K(K Ps + Kj)
(2.107)
5 J + ps z + KKpS + KK {
We can select the controller gains in Equation (2.107) to place the poles of T(s)
in the desired locations (see Chapters 4 and 5) to meet the desired performance
specifications.
