CAJ | 학술논문

为分析直驱式永磁同步风力发电机组的联网运行特性,建立了直驱式永磁同步风力发电机组联网运行的数学模型;构建以永磁同步发电机输出功率为反馈量、转速为控制对象的最大风能捕获发电控制模型,建立了单位功率因数、i_d=0为目标的两种无功功率控制模型;在PSCAD/EMTDC仿真平台上建立相应的仿真模型,对直驱式永磁同步风电机组联网运行进行仿真分析,对所建立的数学模型和控制方法的有效性进行了验证,对比分析了发电机侧变流器采用两种无功功率控制策略时的运行性能.
위분석직구식영자동보풍력발전궤조적련망운행특성,건립료직구식영자동보풍력발전궤조련망운행적수학모형;구건이영자동보발전궤수출공솔위반궤량、전속위공제대상적최대풍능포획발전공제모형,건립료단위공솔인수、i_d=0위목표적량충무공공솔공제모형;재PSCAD/EMTDC방진평태상건립상응적방진모형,대직구식영자동보풍전궤조련망운행진행방진분석,대소건립적수학모형화공제방법적유효성진행료험증,대비분석료발전궤측변류기채용량충무공공솔공제책략시적운행성능.
In order to analyze the performances of directly-driven permanent magnet synchronous generator wind turbine (PMSG-WT) connecting to the grid, a dynamic model of PMSG-WT is established. The generator side converter is used to control the active power transferred from the generator by feeding the output active power back to achieve maximum power point tracking and to control the reactive power exchange with the generator in the modes of unit power factor and i_d=0 with the objective of keeping the d-axis air-gap flux equal to the rotor permanent flux respectively. The grid side converter is used to keep the dc-link capacitor voltage constant and exchange reactive power with grid. The validity of the established model and proposed control strategies are demonstrated by simulation system under the software package PSCAD/EMTDC and the operation performances of the generator are compared when controlled by the two reactive power control strategies.