Is it possible to connect a battery model to a solar pv system and see the charging and discharging of the battery ?

Hi .. I am doing my project on Hybrid( PV array with Fuel Cell systems) Renewable Sources with storage . When i am using a battery model I dont know how to connect it to a variable load.

How to design a variable DC load of say 1 KW to 5 KW?

How to connect two power sources delivering V+ and V- outputs together ?( I have connected in parallel for the time being)

[Reyasudin]

@ Sankeerth Sudhan as requested:

You can control your load by using a switch ( power electronics block)connected between two loads ( 1kW and 4kW).

As for battery SOC, there are several techniques to charge such as: Constant current , Constant voltage + Constant current

Maybe you can do a review on the techniques available for battery charging.

The simplest way is to use a constant current to charge the battery.

You can use a matlab function block to create the controller. The input of the block is the battery voltage and current. Inside the block, you may need to write a matlab script that reads the values and determine when to charge and discharge the battery. The function block output should be connected to a PID controller which will make sure it will deliver constant current to charge the battery. After the voltage is max, the controller will send a signal to a switch that will disconnect the battery from the source.

If you want to ask a different question, please open a new thread.

thanks.. hope this helps

[tandava anjali]

could u create simulink model for battery

[Faiz Daniel]

Can i get the Simulink for stand Alone system?

[omar]

yes

Answer 1

[Reyasudin]

Dear Sankeerth,

You must state in your questions what kind of hybrid technologies you plan to model.

I guess that you want to model standalone PV/ battery system.

You need to create a common DC bus in order to integrate both of the system together.

After that, you may want to develop a MPPT control system in order to obtain maximum powr from PV array and also to control the charging and discharging of the battery.

[Sankeerth Sudhan]

@ReyTech

Sir , I am modeling a Hybrid Solar - Fuel cell model.

Common DC bus i have just interconnected both the solar boost converter output and fuel cell boost converter output in parallel mode so that the voltage remains almost same .

I am facing difficulties in modelling a variable dc load now .

Battery I have connected across the main load .. ( assuming a constant one for time being )

Anyone can help me with variable DC load modelling ? also a Voltage control system to have constant voltage to the DC bus ..!! ??

Any help would be appreciated

[Reyasudin]

Maybe it would be easier for others to help if you can post your model (screenshot) here.

Answer 2

[subhendu sekhar]

depending on the current drawn ....you need to vary the resistance vallue accoarding to it

[Sankeerth Sudhan]

depending on the current drawn ? Load draws the current . So I want a variable load which draws different currents at different times , basically change the load from 1 KW to 5 KW .

Regards

Sankeerth

[subhendu sekhar]

use a circuit breaker and connect a load . set the operation of circuit breaker to start after some specified time ...

Answer 3

[Tony Castillo]

Hi everybody, I'm trying to make it works but i couldn't get it yet, because I'm having the same trouble than the boy than wrote first the question I read your lines but I follow without understand correctly, basicly I'm constructing a model in SPS for supply DC energy than comes from a group of batteries and those batteries are charged from solar irradiation provenient of array panels but I do no see that it happens, can anyone of you give me a hand with this?.

Answer 4

[Prabhu Prasad]

hello i just wanted to connect pv array to battery in simulink how can i do it