Mumbai-Ahmedabad bullet train project: How will India’s first high-speed train get uninterrupted electricity to run?

The bullet train cannot rely on a single nearby electricity source for a 508-kilometre route. NHSRCL is therefore building a dedicated power network along the Mumbai-Ahmedabad corridor. Its purpose is to provide a dependable electricity supply for high-speed trains during operations.

This network will include 14 traction substations across Maharashtra and Gujarat. Each substation will receive electricity from the main grid, transform it to suitable voltage levels, and send it to the overhead equipment above the railway. The trains draw power through this system as they travel along the corridor.

The first substation, at Bilimora in Gujarat’s Navsari district, is nearing completion. The wider network will also be watched through a centralised control centre in real time. That monitoring should help NHSRCL track the power infrastructure continuously as construction and commissioning progress.

A traction substation is a specialised facility in the railway’s power supply system. It receives electricity from the main grid and prepares that electricity for railway use. This matters because trains need a controlled, suitable supply while moving along the corridor.

At the substation, transformers change the incoming electricity to required voltage levels. The facility then transmits the prepared electricity to overhead equipment, or OHE, installed along the railway. A train collects electricity from this overhead system during operation. Bilimora is one example of this arrangement.

The Mumbai-Ahmedabad corridor will have 14 such substations in Maharashtra and Gujarat. Bilimora’s substation will receive electricity from GETCO’s 220 kV Ambetha Grid Substation. Its equipment installation, testing, and commissioning are progressing, helping build the power system needed before high-speed operations.

The planned power-supply system is distributed across the entire Mumbai-Ahmedabad bullet train corridor. NHSRCL is developing 14 traction substations to provide electricity for the 508-kilometre route. This spread supports power delivery at selected locations rather than depending on one facility.

The substations will be located in two states. Five locations are planned in Maharashtra, while nine locations are planned in Gujarat. Each facility will connect with designated electricity grid substations and supply the overhead equipment used by the trains.

The first facility nearing completion is at Bilimora, in Gujarat’s Navsari district. Its site covers approximately 18,000 square metres. Equipment installation has been completed in the control panel, changeover switch, transformer, and circuit breaker buildings, while testing and commissioning activities continue.

Electricity follows a defined path before reaching a bullet train. It starts at the main electricity grid, which supplies power to designated grid substations connected to the railway’s traction substations. This arrangement creates a dedicated route for supplying the corridor.

For Bilimora, GETCO’s 220 kV Ambetha Grid Substation will provide the incoming electricity. The Bilimora traction substation will receive that supply and transform it to the voltage levels required by the railway. It will then transmit the power to overhead equipment installed along the track.

During operation, the train draws electricity from this overhead equipment. Bilimora’s equipment installation is nearing completion, including work in its transformer and circuit breaker buildings. Testing and commissioning are progressing, while the full network will be monitored continuously from a centralised control centre.

The Mumbai-Ahmedabad corridor will use a 2 × 25 kV traction power supply system. The article identifies this as the advanced arrangement selected for the corridor, with electricity supplied through overhead equipment to power trains during operations.

In practical terms, the system uses a 25 kV railway supply arrangement with an additional feeder at 25 kV, creating the 2 × 25 kV configuration. The traction substations prepare and distribute this electricity to the overhead equipment along the route. Trains then collect power from that equipment.

The article does not explain why the voltage is high. A basic electrical principle provides the context: for the same power, higher voltage means lower current, which generally reduces energy losses in transmission. The system is intended to support reliable power distribution across the long corridor.

Bullet trains depend on a continuous electricity supply from the traction network. If a traction substation or its connection to the electricity grid could not provide reliable power, the overhead equipment might not receive enough electricity. Trains on the affected section could then face interruptions.

The likely consequence is slower service, delays, or a temporary halt in train operations where power is unavailable. The article does not describe a specific failure scenario, so the exact operational response is not stated. However, loss of traction power would prevent normal electric train movement on the affected section.

NHSRCL is addressing this risk through 14 substations connected to designated grid substations. The network will also be monitored in real time through a centralised control centre. These arrangements are intended to support continuous monitoring and dependable electricity distribution as the corridor becomes operational.

These components divide the power system’s jobs. Transformers change incoming grid electricity to the voltage levels required by the railway. Circuit breakers are protective switching devices that can disconnect a circuit when necessary. Together, they help control and protect the supply sent toward the overhead equipment.

At Bilimora, installation in the transformer and circuit breaker buildings has been completed. The substation will receive electricity from GETCO’s 220 kV Ambetha Grid Substation, process it, and transmit it to the railway’s overhead equipment. This prepares electricity for use by the high-speed trains.

The entire traction network will also be monitored in real time through a centralised control centre. The article does not detail the centre’s specific controls, but continuous monitoring can help operators observe supply conditions and respond to problems. Testing and commissioning at Bilimora are still progressing.