Cambodia to reduce hydropower and develop coal and solar capacity

Cambodia, which relies heavily on hydropower, has witnessed power shortages due to reduced hydropower generation owing to draughts and lower water levels in the dams.

The country’s recent 10-year plan has low impetus on developing mainstream dams and seeks alternative sources to meet the electricity demand from coal, LNG, solar PV and imports from neighboring countries.

Around 83% of the new generation capacity built between 2020 to 2030 will be from coal (56%) and solar PV (27%) while hydropower (8%) and oil (9%) are likely to account for the remaining new capacity, says data and analytics company, GlobalData.

Ankit Mathur, practice head for power at GlobalData, says: “Cambodia had predominantly looked at hydropower for meeting its power needs. Hydropower accounted for 58% (nearly) of the generation in 2018, falling by approximately 45% of the generation in 2019.

“The droughts in 2019 had brought down the share of hydropower in the nation’s generation mix significantly, compelling to opt for alternative sources to support the generation mix and avoid such unforeseen circumstances.”

The Mekong river provides a strong potential for the development of hydropower in the country. However, the development has found strong opposition from the environmentalists due to potential harm to the fisheries and farmlands next to the basin.

The government is keen to invest in the expansion and upgrade of the electricity infrastructure. It is estimated that the current transmission and distribution network is likely to expand at a compound annual growth rate (CAGR) of 11.8% until 2025, almost doubling the transmission line length from the present. This expansion is likely to ease the transmission and distribution woes, and support the new capacity built.

Mathur concludes: “Cambodia’s recent approval of more than $830 million worth of electricity infrastructure projects, including a 150MW hydro project, 265MW coal-fired plant and three transmission lines, clearly draws the line for lower hydropower development and focuses on alternative sources.”

According to Mathur, the country seeks to ensure a sustainable generation mix to expand the national grid, reduce electricity prices and lower imports. “The increased expansions of the coal-based power plants and LNG suggest that the country is significantly reliant on imported fuel and electricity and it will continue to do so until the lined-up infrastructural projects materialize completely.”

This article was originally posted on Power Engineering International and was republished with permission.
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