recommend feasible best alternative solutions | My Assignment Tutor

Final- presentation forKinewell Energy-TEAM 35Team Members:Team 35:oPraathosh Vijayakumar (Project manager)oMuralidhar Pampati (Communication lead)oWajid Mohammed (Technical Lead)oVivek Babu (Technical assistance)Industrial Supervisor:oPeter BrooksAcademic supervisor:oProf. Mohammed RahamatiAim and Objectives:•AIM:•The aim of this project is to understand the current layout and torecommend feasible best alternative solutions resulting in reductionof cable length/ cost/ Redundancy.•Objectives:oTo provide efficient configuration of the network to boostefficiency.oTo analyze and provide protection philosophies that can be set-upduring emergencies.oTo analyse the change in power flow when fault conditions occuroTo analyse the power through the cable during the fault conditions.Conditions considered for the wind farm:Number ofTurbines:52Turbinepowerrating: 3MWLifetime oftheturbines:20 to 25yearsDistanceto theshore: 20KMQuestion 1:Radial structure used:Types of Mesh networks:Radial: In this design the turbines are connected to the strings in a seriesfashion as shown in the figure 1.• Pros: The design is very simple and cable length is relatively less with lowcapacity.• Cons: The major drawback is its Poor Reliability.Ring: There are different designs are available based on the ring structures suchas single sided, double sided ring and multi ring structure.• Pros: High reliability and less losses• Cons: Cost is almost doubledStar: The drawback of Ring structure i.e. the cable length and ratings can bereduced by using the star network. In this design the turbines are connected tothe common point.• Pros: Reliability is higher• Cons: Cost and losses are very high.Adopted Design:All the drawbacks of Radial, Ring and star network can be overcome bythe Multi-loop structure.In this project we are using the Multi loop structure along with the branchnetwork to make the system more reliable.• Working:• Throughout the process we are using the Ring 1 to discuss the differentfault cases and the same can be applied to the other Rings.• In the Current design we are using 10 turbines in a ring and byconsidering the ring as 67% rated which means if there are 10 turbinesin a ring then the cable can carry 7 turbines while the other 3 will be outof service.Working conditions:Normal Working Condition:During this period the redundant links 1 to 8 will be open and acts as a ring structure. For example if cable 6 fails then the4 turbines will be out of service. Therefore, to make it more reliable multi loop structure is used by closing the redundantLinks.Under Faulty Condition:If only one cable fails:• If cable 1 or 2 fails then close the redundant link 1 and 5 by opening the cable 4.• If cable 3 or 4 fails then close the redundant link 5If only two cable fails:• If cable 1 and 6 fails in Ring one, then close the redundant links 1,5,6,9 by opening the cable number 4 in boththe rings 1 and 2• By using the redundant links in the multi loop structure maximum reliability can be obtained by keeping themaximum number of turbines connected to the PCC.Question 2:Protection Methods:Different methods that can be used:• Circuit breakers and device circuit breakers• Selecting the right device circuit breakers• Tripping characteristics• Redundant power supplyAdvantage of Redundant Power supply:• A redundant power supply significantly increases availability and productivity.• Both connection errors, voltage dips in a primary supply branch does not affect the output voltage.Circuit Breaker:The HVDC circuit breaker is a switching device that interruptsthe flow of abnormal direct current in the circuit.The main application of the HVDC circuit breaker is tointerrupt the high voltage direct current flows in the network.DC Circuit Breaker are fast switching, can be used in serieswith a capacitor to limit and interrupt capacitor dischargecurrent during a fault. But can not be used in high -voltagecapacityHVDC Circuit BreakerCable protection:The method used for cable protection here is the BurialMethod.• Burial has been shown to be preferable as it both protectsthe cable from impact and is cost effective when comparedto armouring.• Cable burial has been stipulated based on a uniform depth,with often minimal regard to the nature of the threat andthe degree of protection provided by burial to differentdepths in different soil types.Armouring is normally applied to a cable by adding furtherlayers of wire strands. It is expensive as well as may damagecable by adding further layers.Cable armourQuestion 3:Power Flow:• Considering loop 1 which has 14 links in total• Assuming that each turbine is able to generate 3 MW of electricity• so the average amount of energy transmitted from loop 1 is 42 MW• Loop 1 has two redundant links between 5 and 10 and another with anbetween link 4 and link 11.Assuming link 1 and link 6 fails power can be transmitted using redundantlinks.so the total power transmitted here is 12*3= 36MWWorst Case scenario:• If two cables parallel to each other fails which are probably in middle tothe redundant links• For eg : link 4 and link 9 fails then the power from 5 turbines cannot betransmitted so that they can be isolated until repaired• Here more than 50 percent of power Is transmitted.• Else we can connect the link 5 and redundant link 1 so that maximumpower is transmittedFlow of Events:Question 4:Insulation Used:Mass-impregnated paper-insulation is used in this projectThis insulation is typically used in HVDC transmissionsAdvantage of Mass-impregnated paper-insulation:• The lapped paper insulation is impregnated with a high-viscosity fluidand these cables do not have the LPOF cable’s risk of leakage.• has a maximum power rating of 2000MW and a voltage rating of500kv• Does not have any restriction in the amount of length the cables canbe manufacturedMass-impregnated paperinsulationConductors Used:• The conductor in medium and high-voltage cables is copper• Ampacity increases proportionally with the cross sectional area, whichcan range up to about 2000 mm2• Large cables may have a bending radius as large as 6 m (20 ft.).Sheathing:Outside the screening of all the conductors is a metallic sheathing, whichplays several roles.Advantage of Sheathing:• It helps to ground the cable as a whole and carries fault current if thecable is damaged.• Protection against moisture ingress.• Excellent corrosion resistance.Armour:• An overall jacket and then armouring complete the construction.• Corrosion protection will be applied to the armour; this may include abiocide to inhibit destruction by marine creaturesAdvantages of Armour:• Temperature resistance of Armoured cable• Electromagnetic Interference (EMI)Cable ArmourThank you

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