UC知道翻译一下（6）
来源：百度知道 编辑：UC知道 时间：2024/06/18 07:30:58
In a synchronously rotating dq reference frame, the d and q
system variables will nominally be dc values in steady state.
However, in the presence of a stator-voltage unbalance, the
d and q variables will have a second harmonic component in
addition to the dc component. This, in turn, causes second harmonic
pulsations in the torque (active power) and reactive power.
II. CONTROLLER DESIGN
For the proposed control, stator-voltage-oriented dq vector
control is used. This orientation can be called “grid flux oriented”
control [5]. In this scheme, the d-axis is aligned with
the stator-voltage space vector (instantaneously). Therefore,
vsq = 0(steady state and transient) and ωd = ωsyn (steady state
only). Since the d-axis is collinear with the stator voltage and
the q-axis is quadrature, the d-axis is used to control torque and
the q-axis is used to control reactive power. The control structure
is shown in Figs. 2 and
system variables will nominally be dc values in steady state.
However, in the presence of a stator-voltage unbalance, the
d and q variables will have a second harmonic component in
addition to the dc component. This, in turn, causes second harmonic
pulsations in the torque (active power) and reactive power.
II. CONTROLLER DESIGN
For the proposed control, stator-voltage-oriented dq vector
control is used. This orientation can be called “grid flux oriented”
control [5]. In this scheme, the d-axis is aligned with
the stator-voltage space vector (instantaneously). Therefore,
vsq = 0(steady state and transient) and ωd = ωsyn (steady state
only). Since the d-axis is collinear with the stator voltage and
the q-axis is quadrature, the d-axis is used to control torque and
the q-axis is used to control reactive power. The control structure
is shown in Figs. 2 and
在同步旋转dq参照系, D与Q系统变量名义上是直流值处于稳定状态. 不过,在场的定子电压不平衡; D和q变量将有第二谐波失真除了在直流分量. 这反过来又造成二次谐波脉动的转矩(有源)和无功. 二. 控制器的设计建议管制,定子电压定向dq矢量控制使用. 这种倾向,可以称为"网格通量为导向"的控制[5]. 在这个计划中,D轴与定子电压空间矢量(瞬间). 因此,vsq=0(稳态和瞬态)和D=syn(稳态). 自从d轴collinear与定子电压与q轴正交, 在D轴是用来控制转矩和q轴是用来控制功. 控制结构的是列在南半球. 2和3. 控制拓扑是相当标准除增加thecd,compandcq,comp控制器 补充了d-q轴转子电压. 这些追加反馈给控制器环路非常高增益已知的干扰频率(100赫兹) 允许控制器用于补偿转矩和功pulsations时所产生的定子电压是不平衡的. 降低功脉动大大改善了不平衡的定子电流. 从对称元件的角度来看, 补偿转矩和功pulsations好比一个控制器注入负序入转子回路 以这种方式来补偿的负序的定子电路. 净效果是减小转矩脉动,功脉动 而定子电流不平衡不平衡电网电压的条件. 厂转移职能和控制器增益,详载于附录