anant_s
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I'm answering your question in 2 parts owing to number of images limitation.
Part 1
Air Conditioning and auxiliary load in LHB coaches is met through two EOG generators (one standby) feeding at 750 kW, 750 V AC.
Architecture
We need to understand how a coach load is supplied.
The 750 V (50 Hz) is actually fed to a coach mounted transformer (60 kVA, 750/415 V, Step Down). here we have two requirements, 415 V for Air Conditioning and 220/110 V for lighting and auxiliaries (cellphone chargers etc).
Now here something known as Electronic regulator and rectifier Unit (ERRU) is used for feeding Non Air conditioning loads (110 or 220V loads).
I would like to share what loads are required (data from an IISc Bangalore paper). the data quoted is for LHB coaches and helps us understand how solar power can help.
As you can notice, AC load accounts for bulk of power consumed by a coach and remaining loads are quite small.
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How non AC loads are supplied
In ICF coaches are equipped with bogie mounted generating units (similar to dynamo). these units get power through a Cardan Shaft from a gear box rotating an alternator, which feeds batteries and in turn batteries provide power through an inverter unit.
This scheme is also applicable to all ICF trains that do not have EOG cars.
Now as we have seen if the coach is NON AC, the net power requirement is significantly low and ERRU can feed all the required loads.
This is Where Solar power comes into picture.
It is proposed to mount two Solar Photovoltaic (PV) Cells panels on each coach covering the entire length of coach.
These solar panels shall then feed ERRU as follows:
Now you can see, that ERRU is being fed from Solar panels, which essentially is reducing or eliminating load on Auxiliary load transformer.
......continued Part 2
Part 1
At Least not immediately.@anant_s will this mean an end to generator vans in LHB sets ?
Air Conditioning and auxiliary load in LHB coaches is met through two EOG generators (one standby) feeding at 750 kW, 750 V AC.
Architecture
We need to understand how a coach load is supplied.
The 750 V (50 Hz) is actually fed to a coach mounted transformer (60 kVA, 750/415 V, Step Down). here we have two requirements, 415 V for Air Conditioning and 220/110 V for lighting and auxiliaries (cellphone chargers etc).
Now here something known as Electronic regulator and rectifier Unit (ERRU) is used for feeding Non Air conditioning loads (110 or 220V loads).
I would like to share what loads are required (data from an IISc Bangalore paper). the data quoted is for LHB coaches and helps us understand how solar power can help.
As you can notice, AC load accounts for bulk of power consumed by a coach and remaining loads are quite small.
---------------------------------------------------------------------------------------------------------------------------------------------
How non AC loads are supplied
In ICF coaches are equipped with bogie mounted generating units (similar to dynamo). these units get power through a Cardan Shaft from a gear box rotating an alternator, which feeds batteries and in turn batteries provide power through an inverter unit.
This scheme is also applicable to all ICF trains that do not have EOG cars.
Now as we have seen if the coach is NON AC, the net power requirement is significantly low and ERRU can feed all the required loads.
This is Where Solar power comes into picture.
It is proposed to mount two Solar Photovoltaic (PV) Cells panels on each coach covering the entire length of coach.
These solar panels shall then feed ERRU as follows:
Now you can see, that ERRU is being fed from Solar panels, which essentially is reducing or eliminating load on Auxiliary load transformer.
......continued Part 2