A coordinated control strategy for fault ride-through of offshore wind farm via VSC-HVDC
This paper analyzes the topology,parameter design and control strategy of the distributed DC chopper and improves its control strategy.By comparing the response curves of the traditional DC chopper,the distributed DC chopper and the distributed DC chopper with the improved control strategy,it is shown that the distributed DC chopper with the improved control strategy has a smooth energy consumption curve and better fault ride-through(FRT)performance.On this basis,to address the problem of high cost of DC chopper with traditional FRT strate-gy,the AC-voltage magnitude reduction method is designed based on the permanent magnet direct-drive wind tur-bine to actively reduce the output power of the wind farm when a fault occurs,and the FRT coordination control strategy is designed in combination with the distributed DC chopper using the improved control strategy,which can significantly reduce the capacity of DC chopper and the cost of system while ensuring FRT performance of system.Based on the actual parameters of the Rudong offshore wind via VSC-HVDC project,the effectiveness of the pro-posed coordinated control strategy is verified by establishing the system model in the PSCAD/EMTDC.
offshore wind farmVSC-HVDCfault ride-throughdistributed DC choppercontrol methodvoltage magnitude reduction methodcoordinated control
NETL
NSTL
万方数据
维普
