英语翻译THE THREE-PHASE PWM rectifier is increasingly usedfor in

英语翻译
THE THREE-PHASE PWM rectifier is increasingly used
for industrial applications since it has advantages such as
constant dc voltage control,sinusoidal line current control,unity
power factor control,and bi-directional power flow [1].For
normal operation,it basically requires three kinds of sensors for
detecting ac voltages,ac currents and dc voltage.A dc voltage
sensor is demanded for the dc voltage feedback control and
excessive voltage protection.The two ac voltage sensors are
needed to detect the phase angle of the source voltage,which
is taken as a reference frame of the controller,and thus to perform
input power factor control.The two line current sensors are
required for the input current control for boosting action and excessive
current protection.
Using all of these sensors makes the system bulky and expensive.
In addition,the sensing signal is usually subject to the noise
and furthermore incidental missing of the signal may deteriorate
the system reliability.Therefore,it is desirable to reduce the
number of sensors as far as possible.A few research results have
been reported to eliminate either source voltage sensors [2]–[4]
or line current sensors [5]–[8].However,no method eliminating
both of them has been yet presented as far as authors know.
In this paper,a novel method to eliminate both ac voltage and
current sensors is proposed,which uses only the dc-side sensors.
The phase angle and the magnitude of the source voltage are estimated
by controlling the deviation between the rectifier currentand its model current to be zero.On the other hand,the line currents
are reconstructed using the measured dc output currents
and the switching states of the PWM rectifier.To eliminate the
calculation time delay effect of the DSP,the line currents ahead
one sampling period are estimated by a state observer,and then
the predicted currents are used for feedback control.
The validity of the proposed ac sensorless technique has been
verified through experimental results for 1.5 [kVA] IGBTPWM
rectifier system controlled by a DSP TMS320C31.

三相PWM整流器的是越来越多地使用
工业应用,因为它有优势,如
恒定直流电压控制,正弦线电流控制,统一
功率因数控制和双向功率流[1].为了
正常运行,它基本上需要三个类型的传感器
检测交流电压,交流电流和直流电压.直流电压
传感器要求的直流电压反馈控制,
超电压保护.两个交流电压传感器
需要检测的电源电压,相位角的
已经成为一种控制器的参考框架,从而为执行
输入功率因数控制.两线电流传感器
所需投入的行动和过度刺激电流控制
电流保护.
利用这些传感器都使系统体积庞大,昂贵.
此外,传感信号通常是受噪音
并还附带了信号丢失可能恶化
系统的可靠性.因此,最好减少
传感器数量尽可能.一些研究成果
据报道,以消除或源电压传感器[2] - [4]
或线电流传感器[5] - [8].但是,没有方法消除
他们两人还提出了据作者所知.
在此提出了一种新方法,以消除交流电压和
电流传感器,提出了只使用直流侧传感器.
相角和源电压的幅度估计
通过控制偏差整流器之间的模式电流为零.另一方面,线电流
正在重建使用测量直流输出电流
及PWM整流器的开关状态.为了消除
计算时间的DSP,线电流未来延迟效果
一个采样周期的估计,然后
预测电流用于反馈控制.
拟议的交流传感器技术的有效性已
通过验证实验结果为1.5 [千伏安] IGBTPWM
整流系统的DSP TMS320C31的控制