10.07.2015   SonSolar

Modeling of the system

Beside the definition of the system properties and system planning, modeling was carried out to investigate the planned system. As because basically two different subsystems were planned, the simulation was carried out for each of them. The simulations study of was elaborated using the Nsol simulations software.

The principal elements of the process are:

— indication of the applications site,

— selection from the database the principal insolation data,

— and the produced energy data.

The next steep is to set the hardware properties and the indication of the electrical system parameters like system voltage DC or AC and the used inverter type. As because of the software the equipment database is elaborated mainly for USA use but the data base of the program was possible to extend with the properties of the planned panels, as well.

After the simulations process information can be obtained about the system behaviour, and the energy balance. All the data can be evaluated in graphically and table form, as well. The simulations results for the ASE-100 and the DS40 subsystems are presented.

Insolation Analysis

Global Horizontal and Array Insolation by Month

Fig. 5. The applications site insolation analysis

First the insolation analysis of the proposed site was modelled, the results are shown in Fig. 5.

Subsystem 1 (ASE-100)

Time hour)

Fig. 6. Daily power distribution for subsystem 1 (ASE100)

Grid-PV System Analysis Solar Insolation and System Output

Fig. 7. Modeled monthly energy income analysis for subsystem 1 (ASE100)

From the insolation data the power generated by one panel and by the subsystem was estimated first by use of the software. The results for the ASE-100 subsystem are presented in Fig. 6. and 7.

Fig. 9. Modeled monthly energy income analysis for subsystem 2 and 3 (DS40)

Subsystem2 cnd3 (DS40)

T ime

The same analysis was carried out for the DS40 subsystems 2 and 3 (Fig. 8-9):

Fig. 8. Daily power distribution for subsystems 2 and 3 (DS40)

Grid-PV System Analysis Solar Insolation and System Output

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Fig. 8. Energy production of the 10 kWp system (monthly distribution)

Finally, the energy production of the whole system was calculated in monthly distribution. The results of this calculation can be seen in Fig. 10.

Conclusions

In the paper the planned 10 kWp grid-connected PV system set-up, the hardware configuration and the modelling of the energy production of the subsystems are presented.

In the first part a detailed analysis of the selection of the location is presented with the pros and contras of the selected sites.

The simulations results of the PV grid-connected system provided data series which can be used of the evaluation of the real behaviour of the system. The simulated data can be compared with the measured ones, collected by the data acquisition system.

Acknowledgement

The research was carried out in the framework of the PV Enlargement (EC, NNE5-2001- 00736), the TET RO-11/2002, the OTKA T-042520 and the KAC F-17-03-00011 projects.