The Environment | 287
CLP Power and HEC own their respective transmission and distribution systems. The two transmission systems are interconnected by a cross-harbour link, which provides emergency back-up and some sharing of generating capacity reserve between the two systems. The link has a current total capacity of 720 megavolt- amperes (MVA).
CLP Power's transmission system is also connected to the electricity network in Guangdong Province which facilitates the export and import of electricity to and from the province. The electricity sold to Guangdong is from CLP Power's existing reserve generating capacity. Its sale is governed by an agreement with the HKSAR Government under which CLP Power's consumers are given priority of supply and 80 per cent of the profit from the sales. At the same time, CLP Power buys about 70 per cent of the power generated by the Guangdong Nuclear Power Station at Daya Bay, which has two 984MW pressurised water reactors, to meet part of the longer- term demand for electricity in its supply area.
According to the MoU signed between the Hong Kong SAR Government and the National Energy Administration on 28 August 2008, CPG supported the China Guangdong Nuclear Power Holding Co Ltd in the renewal of its supply agreement with Hong Kong for a further term of 20 years. The quantity of electricity supply will be no less than the current level in principle.
CLP Power also has the right to use up to 50 per cent of the 1 200MW capacity of Phase 1 of the Guangzhou Pumped Storage Power Station at Conghua. Off-peak period electricity from the CAPCO system and the Guangdong Nuclear Power Station is stored in the pumped storage power station, which generates hydro-electricity to meet Hong Kong's demand during peak periods.
There are regulations under the Electricity Ordinance governing the registration of electrical contractors and workers and competent persons, safety of electrical wiring, supply of safe household electrical products as well as protection of electricity supply lines from third party damage.
Climate
Hong Kong has a sub-tropical climate. About 80 per cent of the annual rainfall occurs between May and September. August is the wettest month while January is the driest.
November and December are generally regarded as the best months of the year with pleasant breezes, plenty of sunshine and comfortable temperatures.
January and February are cloudier, with occasional cold fronts bringing in cold. northerly winds. Temperatures may drop below 10 degrees Celsius in urban areas.
March and April may be mild and pleasant but humid with occasional fog. From May to August, it is hot and humid with occasional showers and thunderstorms. Afternoon temperatures often exceed 31 degrees.
Tropical cyclones usually affect Hong Kong between June and October. The close approach of tropical cyclones could bring high winds and widespread heavy