Retrofitting of IPB's at Peterborough Power Station
The removal, refitting and re-welding of three low Voltage IPB’s for Centrica had to be completed to allow the replacement of defective low voltage bushings within a 145MVA power transformer
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Retrofitting of IPB's at Peterborough Power Station
Centrica
Energy contracted TP Power Services for the replacement of three defective low
voltage bushings on a 145MVA power transformer at Peterborough Power Station
during a schedule outage.
As a fully
commissioned and operating site, the isolated phase busduct (IPB) had been
welded into place and needed removing. As there was insufficient time during
the allocated outage to de-fabricate and re-install the busduct as per the
design specification, TPPS proposed the lifting of the three IPB’s as a collective
unit. In order to do this, TPPS had to remove a half metre section of the outer
sheath and the main busbar above the busduct elbow on each of the three IPB’s
whilst ensuring that the outer sheath could be re-welded into place by
splitting into two sections on the horizontal.
With the
bushings replaced, re-installing the IPB’s collectively was the most crucial
part of the project, ensuring the structural integrity and alignment of all
three phases for tack welding. With millimetre perfect positioning, the IPB’s
were lowered into place. Following final positioning and securing through tack
welding, the installation required a variety of filet and butt welding joints
for the two types of high conductivity aluminium.
With
installation complete, TPPS completed the cleaning, inspection, testing and
commissioning of the busduct before finishing works on the transformer for
completion and handover of the project to the client.
The project
labelled the company as an integrated service provider with the technical
experience to deliver our client’s requirements, within the specified outage
period and with the peace of mind through our ISO9001 quality system.