School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
This work is supported by National Natural Science Foundation of China (No.51477134).
To solve the problem of various transform series for traditional wind power system, this paper proposes a hybrid topology of high voltage direct current(HVDC) wind power system based on multi-phase permanent magnet synchronous generator (MPPMSG). The multiple sets of windings of the generator are separately connected to unipolar converters, which connects in series on the DC side and transfers into high voltage to connect the HVDC transmission line. One set of windings injects reactive power into the generator to improve the generator speed regulation and steady-state performance. On the on-shore substation, the line commutated converter (LCC) based on thyristors is applied because of its advantage to block the short-circuit current when the DC transmission line is shorted. In order to solve the multi-winding coupling problem, a feedback decoupling control strategy is adopted for MPPMSG. According to the analysis of short-circuit characteristics for generator, a fault ride-through strategy is proposed combined with the short-circuit current limitation method, which can deal with the short-circuit fault of DC transmission line effectively. Finally, the switching-circuit simulation model of the hybrid wind power system is built in PSCAD/EMTDC, and the effectiveness of the proposed control strategy is verified.
LIU Yindi,ZENG Xiangjun,LUO Yiping,et al.Fault Ride-through Technology of Hybrid HVDC Wind Power System Based on Multi-phase Permanent Magnet Synchronous Generator[J/OL].Automation of Electric Power Systems,http://doi.org/10.7500/AEPS20190427001.