Week 9 Challenge

Aim :- Complete the EMS model with Battery,UC and FC.

Objective :- To complete the EMS model with battery,UC and FC for positive demand.Output of the model should be the power request from UC,FC and battery.

Theory :-

Energy Management System model for Positive Power Demand,

1. The following model shows the positive power demand to run the vehicle from its steady position.
2. In this model we seperated +ve and -ve power demand using switch block.
3. For the FC power request we first use interval test block which contains upper and lower limits and we set it to 23 kw to 55Kw range because for very low and very high power FC efficiency reduce drastically and also FC isn't capable to fulfill instant power demands.For this reason we set the upper and lower limit for the FC.
4. After that we use another interval test block for the UC power request,and here we use two blocks of them,first one for the UC low power demand and second one is for the UC high power demand.
5. In the FC, for the power demand we set lower limit as a 23Kw and for the power demand which less than 23Kw we set UC low power request interval test block which is then connected to the switch block.
6. We follow the procedure as mention above for the UC high power demand,only we need to change the upper and lower limit of the interval test block.
7. Further these two UC interval test blocks connected to the switches to check the SOC of the UC,if SOC is maximum than the threshold then only we can use UC for power request.
8. For the battery we also set the upper and lower limits using interval test block then use the switch block to check for the SOC.
9. If the situation occours where UC and Battery doesn't have enough power or charge then we need to use backup power which have only one source Fuel cell.
10. We have created the subsystem for the backup power where we use 'AND' and 'OR' gate blocks.In OR block uc low and high test is provided using From block which is further connected to the switch. SOC of UC also taken into the account and which also further connected to the switch and both the switches then connected to the AND block to get the backup power output.
11. To get the output of EMS model i've connected drive cycle source block to the power as a input and for the output scope is connected to see the end result of the simulation.

+ve and -ve power switch and drive cycle source,

Output,

1. Total run time for the simulation is 598 sec.
2. As we can see in the scope results the power only requested from the Fuel cell.