The Assam Power Distribution Company Ltd (APDCL) is launching a pilot project to install an underground power distribution network in the region from Khanapara to Dharapur. The estimated cost of the project is around Rs 2,300 crore.
Aim: This ambitious project aims to mitigate frequent weather-related power outages and improve the reliability of the electrical grid.
Features:
The greater Guwahati has been identified as the ‘Priority Area – 1’ and a DPR (detailed project report) has been prepared for the underground cabling works.
To install an underground distribution system (both low tension and high tension lines) from Khanapara up to Dharapur.
The network will cover 10.4 km of power lines from Khanapara to Paltanbazar, 2 km in the FancyBazar area, 9.74 km from Kamakhya to Dharapur and 7 km of power lines from Dharapur to VIP Chowk.
The proposed underground cabling works contains the estimates for all the four sections encompassing 21 33/11kV substations, 70 33kV feeders, 81 11kV feeders, 3,154 distribution transformers (including dedicated ones) and 391 km of LT (low tension) lines.
The underground cabling network will comprise 262 km of 33kV feeders, 435 km of 11kV feeders, 3,393 ring main units for consumers and distribution transformers (DTs), associated LT lines for DTs.
Several factors necessitate this transition. Rising incidences of severe weather, such as thundersqualls, have been causing significant damage to overhead power lines, resulting in extended power outages and posing safety hazards.
By moving the power distribution system underground, APDCL aims to protect the infrastructure from such weather-related damages, ensuring a more stable and resilient power supply.
Benefits of an underground power distribution system:
Enhanced Reliability and Reduced Outages:
Underground cables are less susceptible to weather-related damage such as high winds, storms, and lightning strikes, which can frequently damage overhead lines and cause power outages. This leads to a more stable and reliable power supply.
Improved Safety:
With power lines buried underground, the risk of accidents involving live wires, such as electrocution or fires caused by falling trees or branches, is significantly reduced.
Lower Maintenance Costs:
Although the initial installation cost is higher, underground cables generally have lower maintenance costs over their lifetime due to their protection from environmental factors and reduced risk of physical damage.
Resistance to Vandalism and Theft:
Underground cables are less accessible and therefore less vulnerable to vandalism and theft compared to overhead lines.
Longer Lifespan:
Underground cables typically have a longer lifespan compared to overhead lines due to their protection from environmental wear and tear.
However, this project faces challenges such as:
High initial costs,
potential disruptions during the installation phase, and
the need for advanced technology and skilled manpower to manage and maintain the underground network
Additionally, navigating the existing urban infrastructure to lay underground cables could pose logistical difficulties.
APDCL plans to standardize its distribution network and reduce technical losses. The success of this pilot project could pave the way for broader implementation across the state, enhancing the overall efficiency and reliability of the power distribution system in Assam.
