Abstract
This paper gives a brief summary of the performance of the electrical infrastructure in the earthquakes that struck Christchurch and surrounding regions in 2011, with particular reference to the 22 February 2011 earthquake which was the most devastating.
Highlights
Christchurch has experienced three major earthquakes, and approximately 10 moderate and >7,000 minor earthquakes since 4 September 2010
The affects of the initial earthquake centred in Greendale/Darfield area on 4 September and its effects on electrical infrastructure have been discussed [1]
This paper will discuss the impact of the subsequent earthquakes on the electrical Infrastructure, the 6.3 earthquakes on 22 February 2011 and 13 June 2011
Summary
Christchurch has experienced three major earthquakes, and approximately 10 moderate and >7,000 minor earthquakes since 4 September 2010. In one contracting company engineers made a daily run to get the washing done for their staff families Another contracting company supplied free bottled water, lunches, team building events and BBQs to keep morale high during difficult times in challenging work and home conditions. Often where the ground deformation was sufficient to cause electrical cable damage the water and sewage systems were ruptured Larger generators (total of 3.8 MVA) were found useful to minimise demand on key points in the infrastructure that were suffering constraints (zone substations and distribution network) These were installed at QEII in May to bolster supply capacity to the eastern side of the network during winter (Fig. 17)
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