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asd system
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     Effects of SPWM Dead-time on Common-mode Voltage in Three-level High-voltage ASD System
     SPWM死区对三电平高压变频器共模电压的影响
短句来源
     It analyzed the voltages sag ride-through strategies for ASD system.
     分析了交流调速系统中具有承受电网电压跌落的各种策略。
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     system).
     系统)。
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     That system on .
     该系统基于.
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     Secondly, assessment system of ASD were designed.
     其次设计ASD系统的评价指标体系;
短句来源
     Dynamics Study on System Assessment of ASD
     农业可持续发展系统动态评价研究
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Using Matlab software package, the simulation models of PWM inverter, cable and motor in the ASD systems are built in this paper. The parameters of rise time, cable distance and motor power are changed to simulate transient voltage of reflected waves of PWM pulses at the motor terminals. The relation between the over voltage and cable distance is established and the experiment results prove the validity of the simulation and the models.

本文基于Matlab仿真软件 ,在建立调速系统PWM逆变电源、电缆和电机模型的基础上 ,通过改变上升时间、电缆长度、电机功率等参数 ,仿真电机端子上的PWM脉冲反射波瞬间电压 ,建立反射波峰值电压与上升时间和电缆长度之间的关系。实验验证了仿真结果和模型的正确性。

In this paper, the principle of harmonic generation in a PWM adjustable speed drive (ASD) system and the influence of the long cable outlet have been analyzed A novel topology is presented including 24-pulse rectifier, three-level inverter, etc. In the topology, neutral points of the rectifier, the DC-link, the output filter, and the neutral clamped point of the three-level inverter are got together and merged into the ASD's grounding via a low resistance. Based on the simulation results, an...

In this paper, the principle of harmonic generation in a PWM adjustable speed drive (ASD) system and the influence of the long cable outlet have been analyzed A novel topology is presented including 24-pulse rectifier, three-level inverter, etc. In the topology, neutral points of the rectifier, the DC-link, the output filter, and the neutral clamped point of the three-level inverter are got together and merged into the ASD's grounding via a low resistance. Based on the simulation results, an important conclusion can be drawn that the presented topology is effective to eliminate harmonic.

分析了PWM高压变频器谐波成分产生的机理和当变频器接上长输出电缆时对电机的影响。对6000V/2250kW电机的仿真研究发现,在24脉波整流/三电平逆变的高压变频器中,设置共模电抗器,并将整流器中性点、直流侧中间点、输出滤波器中性点和三电平逆变器箝位点相连,再通过小电阻和系统地连接的这一新型拓扑结构,可以有效地抑制谐波电压对高压变频器的不良影响。

The principle of the common-mode voltage (CMV) in a two-level high-voltage adjustable speed drive (ASD) system has been discussed. In order to effectively eliminating the impact of CMV on ASD's, some measures based on a new topology is presented, including appending a common-mode reactor (CMR) to 24-pulse rectifier and an output LC filter between the three-level inverter and the motor. In this topology, the star point of the output filter, the neutral point of the de-link and the neutral clamped...

The principle of the common-mode voltage (CMV) in a two-level high-voltage adjustable speed drive (ASD) system has been discussed. In order to effectively eliminating the impact of CMV on ASD's, some measures based on a new topology is presented, including appending a common-mode reactor (CMR) to 24-pulse rectifier and an output LC filter between the three-level inverter and the motor. In this topology, the star point of the output filter, the neutral point of the de-link and the neutral clamped point of the three-level inverter are got together. The presented measures and the topology of ASD'S system are simulated by means of simulink tools in MATLAB environment. Based on the simulation results of a 2 250 kW motor, it is concluded that the proposed measures are reasonable, effective and can give some valuable references in designing a high-voltage ASD'S with elimination of Electro Magnetic Interference (EMI).

详细地分析了两电平高压变频器共模电压产生机理。为有效抑制共模电压对高压变频器的不良影响,提出了两种措施和一种新型拓扑结构:在24脉波整流输出的直流电路中设置共模电抗器,在三电平逆变器和电动机之间设置输出滤波器,并将滤波器中性点、直流侧中间点和三电平逆变器中性点相连。利用MATLAB的Simulink环境,基于该拓扑结构对6kV/2250kW的电机进行了仿真研究。从仿真结果可以明显看出,所提出的有关减小高压变频器的共模电压的措施有利于减小电磁干扰,提高变频器运行的可靠性。

 
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