The Electrical & Mechanical Services Department (EMSD) today released a report on CLP Power Hong Kong's (CLP) power supply system.

The Environment & Ecology Bureau explained that in light of multiple power incidents that occurred with CLP in the first half of 2024, it requested the EMSD to conduct a comprehensive review of CLP’s power supply system and make targeted recommendations which should be focused on reducing power supply interruptions and voltage dips, as well as minimising the impact of such incidents on the public.

Under the supervision of the Steering Committee on Review of CLP’s Power Supply System comprising local experts and scholars, the EMSD completed a review and submitted its report to the bureau. The review, which analysed the causes of all incidents of power supply interruptions and voltage dips of CLP from 2021 to June 2024, proposed five action objectives, formulated 11 action strategies and put forward 43 recommendations based on the action objectives.

Under the EMSD’s supervision, CLP had started to implement some of the improvement measures before completion of the review. Measures include using the Intelligent Management System Grid-V to detect risks in the vicinity of power supply equipment, installing additional lightning protection systems, and adding floodgates or flood protection facilities at more critical substations.

The bureau highlighted that in 2025, the number of CLP’s large-scale power interruption incidents affecting over 2,000 households was reduced by half year-on-year. CLP’s power supply system also remained generally intact during the passage of Super Typhoon Ragasa and Typhoon Wipha, during which Hurricane Signals No. 10 were issued.

As regards the power interruption incident that occurred in Kowloon City on December 18, 2025, CLP activated interconnectors to allocate backup power and conducted remote operations, restoring supply to over 70% of affected customers within four minutes, which proved that the recommendation “to increase the number of interconnectors in the urban distribution network” in the review report may effectively reduce the scope and duration of incident impacts on customers. Moreover, CLP, in accordance with the newly established service pledge, sent a maintenance team to the site within 22 minutes after the incident to conduct a power outage inspection.

The bureau added that it will work with the EMSD to closely monitor CLP’s implementation of the recommendations in the report, particularly on fostering CLP to establish a more proactive maintenance culture, with a view to enhancing the stability and reliability of CLP’s power supply system and reducing the likelihood and impacts of power incidents in the future.