摘要
详细分析了输入侧电压扰动(包括瞬时电压跌落、三相不平衡等)对矩阵式变换器驱动异步电机调速系统性能的影响,包括电机电压波动和电机转速跌落。提出了一种抑制输入电压扰动的控制策略,采用空间矢量过调制技术,扩大了系统的运行范围。仿真分析和实验结果表明,提出的抑制输入电压扰动的控制策略在输入电压跌落和不平衡两种情况下,均可有效地补偿矩阵式变换器输出电压,维持电机转速的恒定。从而增强了系统的抗扰动能力,提高了系统的稳定性和适应性。
The influences of input voltage disturbances （including short-time voltage sag and unbalance） on matrix converter fed induction motor drive system are analyzed in this paper, which deteriorate the motor voltage and lower the motor speed. A control strategy which restrains the input voltage disturbances is proposed. Over-modulation technique is employed in this control strategy, which expands the operation range of motor drive system. Experiments and simulations demonstrate that, the motor voltage is compensated effectively and the motor speed is maintained under input voltage disturbances by using the proposed control strategy. The anti-disturbance capability and stability of the drive system are improved and enhanced.
出处
《电工技术学报》
EI
CSCD
北大核心
2009年第10期47-52,共6页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目(50607012)
