Optimizing power facilities in low-lying areas

CEM Improvement Works

Ensure Stable Power Supply

At present, the power supply in Macau is mainly transmitted from Mainland. In order to improve the reliability and stability of the power supply, CEM has maintained close ties with the Guangdong Power Grid (GPG) to continuously strengthen the disaster prevention and resilience capabilities for Macau’s transmission network. It includes increasing the power supply point of the 500kV main network from two to three, gradually change the 220kV overhead cable to underground transmission cable, and construct the third 220kV transmission cable connecting GPG. These optimization projects will enable Macau power grid to form a complementary pattern of the three transmission channels from the North, Central to the South, which will effectively reduce the impact of typhoons on the transmission network and secure power transmission to Macau during inclement weather.

Another important infrastructure project that will help ensure reliable power supply is the new gas turbine generator units planned to be built in Coloane Power Station. In view of the growing demand for electricity in Macau, CEM has suggested the Government to replace some of the old power generation units with eco-friendly and efficient gas turbine generator units, in a bid to solve the problem of severe aging of the existing generation units and thus enhance local power supply capacity. After the new gas generation units are put into operation, the local power generation capacity is expected to significantly reach 30% under normal circumstances. Together with the diesel generators, can reach 50% in an emergency, which will enable Macau to cope with extreme weather conditions more effectively in the future. In extreme cases, local power generation units will be able to protect the power supply of important local utilities and the majority of the population.

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Strengthening flood control measures for medium and low voltage distribution networks

Taking in the experience from previous typhoons, especially for flooding in low-lying areas, CEM implemented a series of flood control measures and solutions to reduce the risk of power facilities being flooded and the impact on the public. The measures include optimizing the medium-voltage network structure, raising power facilities, installing flood barriers, strengthening the sealing of cable inlets, as well as installing flood alarm systems, flood detectors and sump pumps in customer substations, and so forth, to comprehensively improve the power facilities’ resistance to natural disasters.

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