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OPERATION REVIEW
WORLD-CLASS STANDARDS OF NETWORK
RELIABILITY
To deliver electricity from LPS, the wind turbine and solar
power system to customer premises, HK Electric operates
a transmission and distribution network of 6,233 km of
underground and submarine cables. The system is monitored
and controlled by a state-of-the-art computer system at the
System Control Centre. The company operates a year-round
programme of proactive maintenance and upgrades to ensure
safe, secure and affordable power supply for customers.
In 2016 HK Electric once again attained a supply reliability
rating of over 99.999%, a record maintained for the
20th consecutive year. The average unplanned customer
minutes lost per year has been less than one minute since
2009. We successfully achieved a better performance in
average supply availability, appointment punctuality and
connection and supply performance compared with the set
benchmarks, qualifying for financial incentives under the
Scheme of Control arrangement.
We continued to expand the application of an advanced
online partial discharge detection system to monitor
equipment performance in primary stations and cable
diagnostic techniques to identify weak components in
the cable network, successfully averting two potential
transmission switchgear faults and detecting 16 potentially
faulty 11 kV cables.
are confident of achieving these targets with the increased
gas-firing capacity now under construction, as well as
through our range of emissions control equipment and
measures.
The fire and gas-leak detection system of the gas receiving
station at LPS was upgraded to enhance security of supply
to the two existing gas-fired combined cycle units, including
the installation of open-path gas-leak detectors, acoustic
sensors, thermal image cameras and closed circuit television.
Further modifications will be carried out in 2017. The
modernisation of the water supply systems initiated in 2014
were progressing according to schedule.
The company’s 1-MW solar power system and the iconic
Lamma Winds generated 979 MWh and 492 MWh of
electricity respectively in 2016. These two renewable energy
systems together cut carbon dioxide emissions by
1,230 tonnes in 2016.
Two sophisticated real-time computer systems, namely, the
Energy Management System (EMS) and the Distribution
Management System (DMS) with smart grid features control
and monitor the company’s generation, transmission and
Acoustic sensors installed to enhance the safety infrastructure of
Lamma Power Station.
Proactive network upgrade and maintenance is key to HK Electric’s
high reliability rating.
2016 ANNUAL REPORT
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