CAJ | 학술논문

为实现开关磁阻(SRG)风力发电系统中能量在电网与电机之间的双向流动,提出了一种基于双脉宽调制(PWM)变换器的控制方案.机侧变换器进行矢量控制,调节定子有功、无功功率;网侧变换器控制直流母线电压的稳定,调节网侧功率因数.分析了双PWM变换器的数学模型,并在其d-q轴数学模型的基础上研究了网侧变换器的控制策略,讨论了通过电网电压定向矢量控制实现交流侧功率因数和直流母线电压控制的方法,并利用空间矢量调制方式(SVPWM)对网侧变换器进行控制.基于上述方案建立了SRG系统仿真模型,仿真结果表明,基于电网电压定向的双PWM变换器矢量控制策略能使SRG系统得到快速动态响应并实现高功率因数输出,从而满足变速恒频(VSCF)发电系统的要求.
위실현개관자조(SRG)풍력발전계통중능량재전망여전궤지간적쌍향류동,제출료일충기우쌍맥관조제(PWM)변환기적공제방안.궤측변환기진행시량공제,조절정자유공、무공공솔;망측변환기공제직류모선전압적은정,조절망측공솔인수.분석료쌍PWM변환기적수학모형,병재기d-q축수학모형적기출상연구료망측변환기적공제책략,토론료통과전망전압정향시량공제실현교류측공솔인수화직류모선전압공제적방법,병이용공간시량조제방식(SVPWM)대망측변환기진행공제.기우상술방안건립료SRG계통방진모형,방진결과표명,기우전망전압정향적쌍PWM변환기시량공제책략능사SRG계통득도쾌속동태향응병실현고공솔인수수출,종이만족변속항빈(VSCF)발전계통적요구.
To achieve the aim of energy bidirectional flow between grid and generator in switched reluctance generator(SRG)wind power generation system,a control scheme based on Back-to-Back PWM converter is proposed.The generator-side PWM converter adjusts the active and reactive power by vector control,while grid-side PWM converter adjusts power factor by keeping the stabilization of DC bus voltage.The mathematic model of Back-to-Back PWM converter is analyzed,and the control strategy of grid converter is researched based on the d-q axis model.The approach of the AC power factor and DC bus voltage of grid-side converter regulated by grid voltage orientation vector control is discussed;the grid-side PWM converter is controlled by SVPWM.The model of SRG system based on the control scheme is established,and the simulation results demonstrate that SRG system can satisfy the demand of VSCF wind power generation system not only by realizing high power factor,but also getting fast dynamic responds by adopting the control scheme proposed.