So, you are interested in designing and optimizing the Grid-connected PV System. For this research, you'll need the Fluke-or-equivalent Power Quality Analyzer (e.g. Topas 1000) to be installed at two points of the grid.

The first is connected at the low-voltage side of currents (20kA/31.5kA) and voltages (11kV/230V) transformers after the general switch of PV system at the substation to obtain data measured in two periods of time, preferably for 24 hours in different days (with and without PV system connected to the network), so that a comparative performance analysis of two monitoring periods can be evaluated. And in the same way, the second is connected at the point of common coupling (PCC) of the grid to evaluate the quality of the power injected into the network by the PV system, as shown in the schematic block circuit diagram below.

In this setup, several electrical quantities and parameters such as the active and reactive power, power factor, total current harmonic distortion (THD-I) and total voltage harmonic distortion (THD-U), individual current and voltage harmonics can be measured reliably.



Disclaimer ::
Please keep in mind that the schematic diagram is suggested in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Sorry to tell you that I'm unfamiliar with PowerWorld Simulator Version 17. If the simulator allows you to model, simulate and analyze the Grid-connected PV System before designing and developing the actual system, then it is a good investment.

Fluke is a well-known for designing, developing, manufacturing, and selling commercial electronic test and measurement instruments. Since you asked for what should be included in your system design, it is natural for me to highlight the missing element like the Power Quality Analyzer such as the Topas 1000 (see figure below), which does not come cheap.



The schematic diagram is based on the common configuration for measuring the power quality in a distributed network. As mentioned previously, it is provided in the hope that it will be useful in your design. You can show the schematic diagram to your Senior Electrician, your Project Supervisor, or even people who are generally good in electricity & electronics.

Another issue is you can't simply barge into the TNB Substation and install the Power Quality Analyzer. Either you obtain permission from TNB for academic research program, or you install them in a standalone grid-connected photovoltaic facility, which is available in Solar Energy Research Institute (SERI), UKM. You can also check with work_tgr, who is a graduate from UKM!