3.1.2
- 6
The
In order to meet the growth in system demand, CLP and HEC will
power stations develop dual-fired
at Castle
and Peak
Lamma Island respectively. Castle Peak 'A' Power Station with 4 x 350 MW sets will be completed in 1985 with the first unit scheduled for commissioning in 1982. Castle Peak Power Station will then be extended to accommodate further 4
a
660 MW units. first 250 MW set at Lamma Power Station is scheduled for commissioning in 1982. Further units will be installed as the
A 400 KV grows.
in transmission system
CLP will be established in stages for accommodation of the Castle Pe k Power Station.
load
X
The existing and future power systems in Hong Kong are shown schematically in Fig. 2.
Station and Unit Capacity of Nuclear Power Station
The
maximum unit capacity of nuclear reactors which can be accommodated by the interconnected Guangdong/Hong Kong power system in 1988 is found to be 900 MWe. The criterion adopted in the study is that on sudden disconnection of the fully loaded nuclear unit, the frequency of the system should
fall below 48.0 Hz under all system loading conditions.
not
The maximum station capacity which can be accommodated by the interconnected power system in 1989 is identified to be 2x900 MWe. This is determined by taking account of the co-ordinated overhaul schedule of the generating units, two-shift capability of the fossil-fired units and load-following capability of the nuclear units.
3.1.3
Design of Transmission System
system for accommodation of the based on the following standard of
The design of the transmission nuclear
system is transmission security :
(a)
(b)
power
The network should be capable of carrying the total output from the nuclear power station to either the GPC or CLP system under normal conditions;
The network should be capable of carrying up to 70% of the nuclear power station output to CLP and up to 40% to GPC on loss of one transmission element including pylons.
Various alternative schemes which meet with the above security standard have been evaluated and the selected scheme is shown in Fig. 3.
considered for Two possible sites
location of the
being are
nuclear power station, viz. Tun Yang and Dong Shan. As the choice has not been finalised, for the purpose of this study, it is assumed that the power station would be located at Dong Shan.