crs1026
Superstar
All of these features will be controlled by a computer system that will calculate the best way utilize the battery on the planned route (when to fully charge the battery from diesel and when to leave room for regenerative breaking). Saving fuel not only saves the railways money, it also reduce emissions.
To me, the "smart" part of this is the most interesting. The recharging cycle may be more complex than just brake/recharge, throttle/discharge. And for now, the diesel may not disappear.
A train running at full speed with a fully-charged battery might benefit from using up the battery power, so there is room to recover energy when it next slows down. A train at rest (say, waiting for their turn to move) with low battery charge might benefit from being charged by the diesel, so there is more battery energy on hand to assist with acceleration, meaning the diesel can be smaller. Fixed charging and recovery locations might exist rather than end-to-end wires. Locomotive behaviour may vary from location to location based on the anticipated gradient and energy need/recovery potential as it appears in real time.
It's too soon to know which of these will be found to be of value.
The particular differentiator for passenger trains is HEP. The most modern locomotives can pass traction, auxiliary gen, and regen energy back and forth between traction and HEP load. The moving and at-rest power demands are a lot different for passenger than for freight.
For VIA, this means they have to wait and see what the industry develops, and how CP/CN deploy it, and what other passenger operators do.
- Paul




