A switching DC/DC buck converter topology is chosen. The DC/DC converter is operated at a constant switching frequency and input DC voltage, while the regulation of the output voltage is obtained by varying the converter duty cycle (D). The scheme of the DC/DC buck converter circuit is that illustrated in Fig. 7.13. In such a […]

This section is dedicated to the design and practical setup of a PV emulator, devised by the authors, which is used to reproduce, in a laboratory frame, the electrical behavior of a real PV plant, previously modeled according to a single diode four parameter scheme. The PV generator’s I-V relationship is expressed by Eqs. (3.13) […]

On the basis of the analysis developed in Chap. 7, the considered DC/DC converter topologies, i. e., the buck converter, the boost converter, and the buck-boost con­verter, are all, in principle, possible candidates to be used for the power amplifier stage of a PV emulator. Anyway, the following practical considerations suggest the employment, when possible, […]

Two different issues have to be handled when the PV emulator is required to correctly reproduce the dynamic behavior of a PV generator. The former is related to the need of following the response to rapidly changing environmental conditions or applied load. The latter is known as the arbitrary load problem and it is tied […]

8.5.1.1 Current and Voltage Output The maximum output current and voltage deliverable by the PV emulator have to be defined on the basis of the operating conditions of the considered PV generator. It should be observed that the maximum output current is the short circuit current at the highest solar irradiance, while the maximum output […]

The block diagram shown in Fig. 8.14 summarizes the concept of a PV source emulation, where the feedback structure of a DC/DC converter and the V = f(I) block are highlighted. The feedback controlled DC/DC converter is that described in the previous section. It realizes an output equal to that delivered by the I-V relationship. […]

With reference to the simplified circuit of the buck converter drawn in Fig. 8.12, the state variables can be expressed as in Eq. (8.42). CO

Figure 8.11 shows a buck converter similar to that analyzed in Sect. 7.4 with an additional current generator in parallel to the resistive load. It models the current supplied to an inverter connected to its output. The variable w is the mean voltage supplied by the generator Vs. The buck converter can be considered as […]