BHEL Commissions Two Units in Bhutan Hydropower Project

January 10, 2025

Bharat Heavy Electricals Limited (BHEL) has achieved milestone by successfully commissioning two units of the Punatsangchhu-II Hydroelectric Project (PHEP-II) in Bhutan. This project, which involves a total capacity of 6×170 MW, was executed under a bilateral agreement between India and Bhutan. The commissioning of these units marks the latest advancement in a longstanding partnership aimed at enhancing energy generation in the region.

Project Overview

PHEP-II is a greenfield hydroelectric project located in the Wangdue district of Western Bhutan. It is designed to generate substantial renewable energy, contributing to Bhutan’s energy independence. Upon full commissioning of all six units, the project is expected to produce an annual power generation of 4,357 gigawatt-hours.

Turbine Specifications

The project features the installation of Francis Turbines, specifically designed to operate at a rated head of 241 meters. This is the highest rated head for any Francis Type Hydro Turbine in Bhutan, showcasing advanced engineering and technology. The turbines are instrumental in maximising energy efficiency and output.

Key Dates and Events

The synchronisation of Unit 1 and Unit 2 took place on December 16 and December 17, 2024, respectively. A ceremony to celebrate Bhutan’s National Day was held on December 17, 2024, at the project site. The event was attended by His Excellency Lyonpo Gem Tshering, Minister of Energy & Natural Resources for Bhutan, denoting the project’s significance to the nation.

BHEL’s Role and Contributions

BHEL’s responsibilities in the PHEP-II included the design, manufacture, supply, installation, and commissioning of various electro-mechanical works. This encompassed 6×170 MW vertical Francis turbines, synchronous generators, a SCADA system, and other essential equipment. The equipment was sourced from BHEL’s production units located in Bhopal, Jhansi, Rudrapur, and Bengaluru.

Previous Projects in Bhutan

BHEL has a strong history of executing hydroelectric projects in Bhutan. Notable projects include the 4×84 MW Chukha, 4×15 MW Kurichhu, 6×170 MW Tala, and 4×180 MW Mangdechhu. With the commissioning of PHEP-II, BHEL’s contribution to Bhutan’s total installed capacity has reached nearly 89%.

Current and Future Projects

BHEL is actively expanding its footprint in the region. Currently, the company is executing an order for the 6×200 MW Punatsangchhu-I Hydroelectric Project. Additionally, BHEL is involved in the 4×225 MW Arun-3 HEP and 2×20 MW Rahughat HEP in Nepal. The company has successfully executed over 3.8 GW of hydro projects internationally, with more than 2.8 GW of hydro projects still under execution.

PHEP-II stands for Punatsangchhu-II Hydroelectric Project.
SCADA refers to Supervisory Control and Data Acquisition.
Francis Turbines are named after James B. Francis, an American engineer.
Bhutan’s National Day is celebrated on December 17.
BHEL has executed over 3.8 GW of hydro projects abroad.

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