摘要
电网负载功率的剧烈变化会引起电网特别是小容量电网的供电质量和稳定性降低,为保证电网供电稳定,需对电网负载输出功率及功率变化率进行限幅控制;负载为电机时,需考虑在电机驱动系统中增加功率控制策略。针对上述问题,首先分析了电机驱动控制系统中的功率控制策略对系统动态性能的影响,通过分析发现低功率变化率限制会引起电机转速超调,进而会造成整个系统控制的不稳定和功率波动,因此提出了一种低功率变化率下的功率补偿算法。然后,通过仿真和实验,证明采取该功率控制方法能够解决转速超调和负载功率波动的问题,且具有良好的动静态效果。
The quality and stability of the power grid can be reduced by the dramatic change of the load power, especially in the low power grid. In order to ensure the stable power supply, the output power and the power change rate of the grid load must be controlled. When the load is a motor, power control strategy should be applied in the motor drive system. The influence of the power control stra- tegy on the dynamic performance of the system is analyzed in the motor drive control system. It is found that the low power rate of change will cause the motor speed overshoot, which will cause the instability and power fluctuation of the whole system control. A power compensation algorithm at low power rate of change is proposed. The simulation and experiment are implemented, which proves that this power control method can solve the problem of speed overshoot and load power fluctuation, and that the method has good dynamic and static effect.
作者
孟庆云
邓硕
汪光森
胡安琪
MENG Qing-yun;DENG Shuo;WANG Guang-sen;HU An-qi(National Key Laboratory of Science and Technology on Vessel Integrated Power System, Naval Univ. of Engineering, Wuhan 430033, China)
出处
《海军工程大学学报》
CAS
北大核心
2019年第2期18-25,共8页
Journal of Naval University of Engineering
基金
国家自然科学基金资助项目(51477179
51477184)
关键词
感应电机
电机驱动
功率控制
低功率变化率
induction motor
motor drive
power control
low power rate of change
