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INTER-ARRAY CABLES REDUCING EVOLUTIONARY ALGORITHM


The software is based on an evolutionary algorithm. A single iteration of the algorithm considers a small subset of the network and re-designs it. With many iterations the best areas of the network are kept while re-designing the sub-optimal areas.


The software is extremely fast at doing this, allowing good designs to be found within seconds. This allows for an extensive range of design philosophies to be interrogated leading to significant savings.


FEATURE SPONSOR


CABLING COSTS SOFTWARE PACKAGE


Kinewell Energy has developed the software package Kinewell Layout Optimisation of Cable (KLOC), which reduces offshore windfarm inter-array cabling costs by £3m - £30m per GW of installed capacity.


The KLOC software designs the geographic electrical connections that link offshore wind turbines with a substation, collecting the power before sending it to shore.


CASE STUDY


Kinewell Energy has undertaken a case study of the 576 MW Gwynt-y-mor windfarm currently the second largest operating windfarm in the world. The developer installed design is shown in Figure 3 and the design found by the KLOC software shown in Figure 4. In total the re-design yielded savings of £2.2m, or 3% of the installed cable cost.


CASE STUDY COST DETAIL


During the re-design the overall cable length reduced by 1.66 km. Despite this the cable cost increased by £0.18m due to a higher proportion of the total length using cable with a larger cross sectional area. At the same time the installation cost reduced by £0.34m because a greater proportion of the cable is designed to be laid in shallower waters.


The real benefit in this case study however comes through the reduction of electrical losses; some 1.2 GWh per year which is enough energy to boil the water of 5 Olympic sized swimming pools from room temperature.


Figure 3 Figure 4


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www.windenergynetwork.co.uk


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