I'm reaching out because I wanted to know what are some possible pitfalls if a user wants to create two separate strings to drive a grid-tie inverter as an alternative use of the solar water pumping system? Please note that the user wants this kind of mechanical switching to utilize the solar panels while the water pumping will not be necessary.
I'm working on my project for Solar Water Pumping System and my team and I are looking for whatever information you have.
Dear Emrul Hasan ,
welcome,
I revised the connections in the top circuit diagram. You feed the inverter of the water pump by two strings in series. While you feed the two grid inverters by a separate string.
I see that the connections and switching arrangements are okay.
It remains the sizing of the different components and the their protection.
I have one advise that you in switching you have to adjust the switching to affect brake before make in order to grantee isolation of the two systems and consequently their interactions.
Wish you success.
Dear Emrul:
You could benefit from this valuable article about your topic:
"Dynamic Modelling of a Solar Water Pumping System with Energy Storage"
@https://www.hindawi.com/journals/jse/2018/8471715/.
Abstract:
This paper describes the dynamic modelling of a system used for extraction of groundwater for irrigation using an alternative source of energy. The system is designed based on data of an existing project in Lalmonirhat, Bangladesh. The system comprises a 38.4 kWp solar photovoltaic array, inverter, AC motor, and pump set, which can discharge a maximum of 1,930 m3 of water per day. MATLAB simulation is performed with two types of energy storage system: (i) electric energy using a battery bank and (ii) stored water in a large water tank. A large battery bank and a transformer are needed in the former one, which turns out as a costly solution. The latter one requires a boost converter and a large water tank to store around 2,000 m3 of water, which is also a costly solution. A combination of both systems yields an efficient and economical solution. The effectiveness of these three systems is compared with conventional diesel engine system.
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And this practical research "Solar Water Pump" by Jonathanrjpereira.
@https://www.google.com/amp/s/www.instructables.com/Solar-Water-Pump/%3famp_page=true.
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Also, this valuable article
"Grid-Tied, Off-Grid, and Hybrid Solar Systems" from Solar Reviews.
@https://www.solarreviews.com/blog/grid-tied-off-grid-and-hybrid-solar-systems.
I hope it will be helpful...
With my best regards ....
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