基于18相风力发电系统的环流抑制策略研究  

Research on Circulation Suppression Strategy Based on 18-phase Wind Power System

作　　者：杨光源[1] 周诗嘉 彭光强[1] 武霁阳 辛清明 YANG Guangyuan;ZHOU Shijia;PENG Guangqiang;WU Jiyang;XIN Qingming(Maintenance&Test Center of China Southern Power Grid EHV Power Transmission Company,Guangzhou 510663,China;China Southern Power Grid Research Institude Co.,Ltd.,Guangzhou 510080,China)

机构地区：[1]中国南方电网超高压输电公司检修试验中心,广州510663 [2]南方电网科学研究院有限责任公司,广州510080

出　　处：《高压电器》2023年第10期190-198,共9页High Voltage Apparatus

基　　金：南方电网科技项目(ZBKJXM20180560);国家自然科学基金(51977070)。

摘　　要：多相电机具有转矩大、转矩脉动低以及容错性高的特点,尤为适用于风力发电系统这种低速大功率程度应用场合。文中提出一种基于18相直驱永磁同步发电机的风力发电系统,该系统由18相风力发电电机、三相桥式不控整流器、并联隔离型DC/DC变流器和模块化多电平变流器构成。针对并联隔离型DC/DC变流器之间易产生环流的问题,文中通过理论推导得出环流的计算公式,采用转速外环、电流内环的MPPT控制得到并联隔离型DC/DC变流器的参考导通比分量。将环流控制器以及电容电压反馈控制器输出叠加作为隔离型DC/DC变流器导通比的叠加分量,参考导通比分量和导通比的叠加分量得到隔离型DC/DC变流器的调制信号,通过对变流器开关器件的导通情况进行调节从而实现环流抑制。最后通过MATLAB/Simulink仿真结果验证了所提环流抑制策略的有效性。The polyphase motor has such characteristics as large torque,low torque ripple and high fault tolerance,which is especially suitable for wind power system with low speed and high power.In this paper,a wind power generation system based on 18-phase direct drive permanent magnet synchronous generator is proposed,which is composed of 18-phase wind power generator,three phase bridge uncontrolled rectifier,parallel isolated DC/DC converter and modular multilevel converter.In view of the problem that the parallel isolated DC/DC converters are prone to generate circulation,the calculation formula of circulation through theoretical derivation is obtained in this paper,and the reference conduction ratio component of the parallel isolated DC/DC converter is obtained by using the MPPT control of the outer loop of rotation speed and the inner loop of current.The superposition of the output of the circulation controller and the capacitive voltage feedback controller is taken as the superposition component of the conductance ratio of the isolated DC/DC converter.The modulation signal of the isolated DC/DC converter is obtained by referring to the superposition component of the conductance ratio and the conductance ratio.By adjusting the conductance of the converter switching device,the circulation suppression is achieved.Finally,MATLAB/Simulink simulation results are used to verify the effectiveness of the proposed circulation suppression strategy.

关 键 词：多相风机 风力发电 环流抑制 三相桥式不控整流器 DC/DC变流器 

分 类 号：TM614[电气工程—电力系统及自动化]