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Re: [sumo-user] Some parameters in defining the Electrical Vehicles
Hi  Jakob,
  
Thanks for your reply!
I have made some demo to simulate the EVs with different values on the attribute of StoppingTreshold and Ihave find some result like the picture shown below
0.0000.png
There are some other understanding of the attribute  of cars：
1) whether the attribute of   chargeInTransit    is positive or not depends on the difference of speed timestep by timestep;
2) There is no relationship between the 5th and 6th attributes;
3)  If someone wants to simulate the charging and discharging behavior of EVs and do not want any information of Charging Station, they could add STOPS for EVs to  simulate the charging at the specific location without defining Charging Station. Someone could also get the results about the EVs (like the consumed energy, energy charged)which  they want . If someone also built the configuration with the Suffix name.sumocfg", SUMO GUI could also simulate the charging and discharging behavior of EVs even though we  would not see the Charging Station in the GUI window because Charging Stations have not been defined.

The assumptions mentioned above are true, how did Charging Station  know vehicles are going to charge at that Station and how did the station know how much the energy vehicles are going to charge? And the result I got show that when the speed is "0", the cumption energy is 0, too ?

Could you help me to make it clear？

Best regard！
 
​

On Thu, Jun 14, 2018 at 2:54 PM Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
No. That is a misunderstanding.
The stoppingThreshold has no influence on vehicle behavior. It simply determines whether charging takes place at chargingStations with chargeInTransit=false.
Imagine such a chargingStation being placed in front of a traffic light or at a busStop. Vehicles will occasionally slow down in that area and some of the will charge.
If the stoppingThreshold is set to a higher value, then slow moving vehicles may also charge. If it is set to 0, then only vehicles with speed 0 will get the chance to charge.

If you want to influence the speed of EVs (i.e. to let them charge for some time, then you can define a <stop> element to force them to stop at a chargingStation for some time.
There is currently no model that would do this automatically for you (e.g. when the battery level is low).

regards,
Jakob

2018-06-14 17:27 GMT+02:00 Jane Cheung <cheung180515@xxxxxxxxx>:
Additional questions, 
1) My understanding of  the reply is that the rules that SUMO used to check whether cars had a braking behavior  or not  has no relationship with the attribute stoppingTreshold,
2) There are  two defined ways that EVs could choose when they are charging (moving or stable. The  stoppingTreshold have the function to let SUMO decrease the speed if CharingStation was also defined in the simulation and the  attribute chargeInTransit is set to be  'false'. if the understanding is right, it would mean that the  attribute stoppingTreshold has no use no matter what value it was defined when the  chargeInTransit  is "true"?

Regards!

Jane


On Thu, Jun 14, 2018 at 9:28 AM Jane Cheung <cheung180515@xxxxxxxxx> wrote:
Jakob, thanks for your  detailed reply! 

Regards!

Jane

On Thu, Jun 14, 2018 at 2:24 AM Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
4 is a factor between physical energy requirement and battery drain
5 is a factor between physical energy recuperation and battery charging (0 means no energy is recovered when braking, 1 means all is recovered)
6: charging stations can be configured to either charge moving vehicles or only stopped (attribute chargeInTransit). The stoppingThreshild defines an upper speed boundary that determines whether vehicles are considered as 'stopped' so they will be charged by these stations.

regards,
Jakob

2018-06-14 2:04 GMT+02:00 Jane Cheung <cheung180515@xxxxxxxxx>:
Hi, 
There are some parameters that I want someone could explain to me. There has no more detail information for these parameters. Appreciate for your help in advance.

As shown on the website of
  1. internalMomentOfInertia 
  2. radialDragCoefficient 
  3. ollDragCoefficient 
  4. propulsionEfficiency
  5. recuperationEfficiency 
  6. stoppingTreshold 
For the index  stoppingTreshold, does it have the relationship with the parameter  cuperationEfficiency? The speed threshold used to define braking behavior refers to the  stoppingTreshold?   In other words, if the car's speed is less than the value defined by the  stoppingTreshold, the cars are going to be charging? In my opinion,  whether the cars are going to charge or use the battery energy depends on the difference of the speed in between the simulation step. If the speed is always less than than the parameter  stoppingTreshold,  the cars are going to be charging all the time?
Could someone give a more detailed explanation for the 1-6 index listed above.

Appreciate for your reading it! Thanks!


Jane


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