PERTH AIRPORT Master Plan 2009

P E R T H A I R P O R T M a s t e r P l a n 2 0 0 9
9.3 Power Supply
Perth Airport is connected to the state’s South West
Interconnected System (SWIS) for provision of electricity.
With the exception of Precinct 3, Perth Airport is presently
supplied by two bulk 22,000 Volt supply points at the airport
boundary; one coming from Western Power’s Belmont Zone
Substation and the other from Western Power’s Forrestfield
Zone Substation. Westralia Airports Corporation then
operates an internal distribution network of high and low
voltage reticulation to provide power on the airport estate.
Precinct 3 is connected to the local distribution network
operated by Western Power Services.
The Belmont supply has a capacity of 12 MVA and usually
supplies the areas to the west of the main runway. The
Forrestfield supply has a capacity of 25 MVA and usually
supplies areas to the east of the main runway.
The internal distribution network allows for cross connection
of supplies from different supply points to maintain a level of
redundancy.
A system of stand alone generator sites provides emergency
power in the event of total loss of mains supply. This emergency
power would be used for continuity of passenger processing
and airfield services in accordance with airport standards.
Power Supply Development Plans
Westralia Airports Corporation and Western Power have
identified and planned the construction of a new zone
substation (to be called Munday Zone Substation) which
will replace the Forrestfield supply to Perth Airport. This
substation will be located within Precinct 4. The substation
will have design capacity of 50 MVA to be assigned to Perth
Airport as necessary over time, with provision for further
capacity to be used by Western Power to supply consumers
off the airport estate. Commissioning of this facility will be
timed to match anticipated load growth once the capacity
of the existing Forrestfield supply is reached.
Measures are being taken to reinforce the present 22 kV
distribution system within the airport estate to ensure a
networked and flexible supply is provided to each of the
development precincts.
A further study into long-term power supply and demand on
the airport estate has been commissioned, the objectives of
which are:
• secure and reliable supply to meet long-term demand;
• cost effective supply for airport consumers; and
• efficiently provisioned having regard to the need to control
greenhouse gas emissions.
The study is expected to be completed in early 2010.
9.4 Gas Supply
Gas supply to the airport is currently provided by Alinta Gas.
The existing gas system includes gas reticulation mains along
Horrie Miller Drive, Brearley and Fauntleroy Avenues.
Currently there is a gas main running along the west side of
Horrie Miller Drive which services the International Precinct
and surrounding development. This line is reticulated from an
existing gas main running adjacent to Tonkin Highway at the
southern end of the airport which is close to capacity.
There are two high-pressure gas lines that run through the
airport estate, these are known as the:
• Parmelia Pipeline; and
• Dampier to Bunbury Natural Gas Pipeline (DBNGP).
Gas Supply Development Plans
In the longer term, additional natural gas capacity will be
required on the airport estate as the planned consolidation of
RPT air services proceeds. Further demand for natural gas will
also occur as development in the Commercial Precincts occurs.
To service this projected demand an additional gas main will
be required. Discussions will be conducted with Alinta Gas
to ensure that this additional service is correctly sized and
delivered within required timeframes to support the airport
development plans.
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