Transmission Ten-Year Development Plan 2011-2020 - Eskom

horizon of the TDP up until 2030. The objective of this
strategic study was to align the transmission network
with the requirements of the generation future options
and the growing and future load centres. This Strategic
Grid Study has enabled the 10- year TDP to be aligned
with the future long-term development of the whole
Eskom system.
The addition of over 72 000 MVA of transformer capacity
to the transmission system is an indication of both the
increasing load demand and the increasing firm capacity
requirements of the customers. Approximately 2 800 MVars
of capacitive support are required to support areas
of the network under contingency conditions to
ensure that the required voltage levels are maintained.
They also improve system efficiency by reducing
network losses.
Approximately 14 900 MVArs of reactors are a direct
result of the long lengths of both 765kV and 400kV
transmission lines that will be constructed over this
period. There are also a number of series compensation
projects required on the 765kV and 400kV lines
required to improve the power transfer capability of
the Cape power corridors.
Two new SVCs are proposed to support the
Northern Cape (West Grid) and the proposed Sishen-
Saldanha Spoornet expansion, namely a +200/-100
MVAr SVC at Aries and a smaller one of +45/-100
MVars at Garona.
Some projects have associated distribution projects to
enable customers to benefit from them. For example,
a new MTS substation may require distribution
infrastructure to link it to the existing distribution
network or to connect new bulk loads. Distribution
infrastructure and individual feeder bays to connect
distribution infrastructure or bulk loads are not
reported on individually in this report.
© Eskom 2011
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