ENG-1989 — Page 256

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LAND, PUBLIC WORKS AND UTILITIES

For the HEC, during the year, two of the four 125 MW oil-fired generating units at the Ap Lei Chau Power Station have been transferred to Lamma Power Station to be driven by gas turbines, while the remaining two units have been decommissioned and will be transferred to Lamma Power Station in mid-1990. At the end of 1989, all generating units at the Ap Lei Chau Power Station have been decommissioned and electricity in HEC's supply areas is completely supplied from the Lamma Power Station which consists of three 250 MW and two 350 MW dual coal/oil-fired units, four 125 MW and one 55 MW gas turbines, making a total installed capacity of 2 005 MW. There are plans to add a further 350 MW unit to Lamma in the early 90's.

HEC's transmission system operates at 275 kV, 132 kV and 66 kV and distribution is effected mainly at 11 kV and 346 volts. With the exception of a small proportion of 132 kV overhead transmission lines, all supplies are transmitted and distributed by underground or submarine cables. The supply is 50 hertz, 200 volts single phase and 346 volts three phase. Supplies at high voltage are also made available to consumers.

The transmission systems of CLP and HEC are interconnected by a cross-harbour link, thereby achieving cost savings to consumers through economic energy transfers between the two systems and a reduction in spinning reserve requirements. The interconnection, commissioned in 1981, now has a capacity of 480 MVA. Upon full completion, the total capacity will rise to 720 MVA.

CLP's system is also interconnected with that of Guangdong General Power Company of China and about three million units of electricity are transmitted to Guangdong Province each day. This interconnection results in better utilisation of the company's generating plant during periods of low demand. Also, CLP has signed a contract with the China Merchants Steam Navigation Company Limited for the supply of electricity for a period of 10 years to the industrial zone of She Kou and the adjacent Che Wan area, both in Guangdong Province. The arrangement, which affords She Kou a reliable electricity supply without subsidy from Hong Kong consumers, is illustrative of the close co- operation on energy matters which has developed on both sides of the border.

On January 18, 1985, the Hong Kong Nuclear Investment Company (a wholly-owned subsidiary of CLP) and the Guangdong Nuclear Investment Company (wholly owned by the Chinese Ministry of Nuclear Industry) signed the Joint Venture Contract for the formation of the Guangdong Nuclear Power Joint Venture Company, to construct and operate a nuclear power station at Daya Bay in Guangdong Province.

The Daya Bay Nuclear Power Station will comprise two 900 MW pressurised water reactors which are scheduled for commissioning in 1992 and 1993. About 70 per cent of the power from the station will be purchased by CLP to meet part of the longer-term demand for electricity in its area of supply.

Main electricity statistics and sales figures are at Appendix 36.

Gas

Gas is widely used throughout the territory for domestic, commercial and industrial purposes. Two main types of fuel gas are available: Towngas, distributed by Hong Kong and China Gas Company Limited (HKCG); and Liquefied Petroleum Gas (LPG), supplied by major oil companies based in Hong Kong, namely Shell, Mobil, Esso, Caltex, Hong Kong Oil, China Resources and British Petroleum. Towngas is mainly a manufactured gas, but also includes some substitute natural gas (SNG). The constituents of LPG are butane and propane mixed in approximate proportions of 75 and 25 per respectively.

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