考虑功率控制的感应电机控制方法研究
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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.
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.
引文
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[2] 薛高飞.大容量储能驱动电机的控制及关键技术研究 [D].武汉:海军工程大学,2013.
[3] TANABE T,SATO T,TANIKAWA R,et al.Generation scheduling for wind power generation by storage battery system and meteorological forecast [C]//Power and Energy Society General Meeting:Conversion and Delivery of Electrical Energy in the Century.s.l.:IEEE,2008.
[4] 洪海生,江全元,严玉婷.实时平抑风电场功率波动的电池储能系统优化控制方法 [J].电力系统自动化,2013,37(1):103-109.HONG Hai-sheng,JIANG Quan-yuan,YAN Yu-ting.An optimization control method of battery energy storage system with wind power fluctuations smoothed in real time [J].Automation of Electric Power Systems,2013,37(1):103-109.(in Chinese)
[5] QU L,QIAO W.Constant power control of DFIG wind turbines with supercapacitor energy storage [J].IEEE Transactions on Industry Applications,2011,47(1):359-367.
[6] 王成山,刘梦璇,陆宁.采用居民温控负荷控制的微网联络线功率波动平滑方法 [J].中国电机工程学报,2012,32(25):36-43.WANG Cheng-shan,LIU Meng-xuan,LU Ning.A tie-line power smoothing method for microgrid using residential thermostatically-controlled loads [J].Proceedings of the CSEE,2012,32(25):36-43.(in Chinese)
[7] 李蓓,郭剑波.平抑风电功率的电池储能系统控制策略 [J].电网技术,2012,36(8):38-43.LI Bei,GUO Jian-bo.A control strategy for battery energy storage system to level wind power output [J].Power System Technology,2012,36(8):38-43.(in Chinese)
[8] LIU L,LI H,HWANG S H,et al.An energy-efficient motor drive with autonomous power regenerative control system based on cascaded multilevel inverters and segmented energy storage [J].IEEE Transactions on Industry Applications,2013,49(1):178-188.
[9] 张坤,毛承雄,陆继明,等.基于储能的直驱风力发电系统的功率控制 [J].电工技术学报,2011,26(7):7-14.ZHANG Kun,MAO Cheng-xiong,LU Ji-ming,et al.Power control strategy of directly driven wind turbine with energy storage system [J].Transactions of China Electrotechnical Society,2011,26(7):7-14.(in Chinese)
[10] 章竹耀,郭晓丽,张新松,等.储能电池平抑风功率波动策略 [J].电力系统保护与控制,2017,45(3):62-68.ZHANG Zhu-yao,GUO Xiao-li,ZHANG Xin-song,et al.Strategy of smoothing wind power fluctuation based on storage battery [J].Power System Protection and Control,2017,45(3):62-68.(in Chinese)
[11] 王铮,RUI Pestana,冯双磊,等.基于加权系数动态修正的短期风电功率组合预测方法 [J].电网技术,2017,41(2):500-507.WANG Zheng,RUI Pestana,FENG Shuang-lei,et al.Short-term wind power combination forecasting method based on dynamic coefficient updating [J].Power System Technology,2017,41(2):500-507.(in Chinese)
[12] 谷立臣,刘沛津.在线监测电机功率状态的图形识别方法 [J].中国电机工程学报,2012,32(9):100-108.GU Li-chen,LIU Pei-jin.A monitoring method for power condition of AC motors via graphic recognition [J].Proceedings of the CSEE,2012,32(9):100-108.(in Chinese)
[13] 王果,朱大鹏.直流电机双闭环调速系统的工程设计方法仿真 [J].电机技术,2005(3):23-25.WANG Guo,ZHU Da-peng.Speed regulation system of double closed loop of DC motors [J].Motor Technology,2005(3):23-25.(in Chinese)
[14] 张东立.直流拖动控制系统 [M].北京:机械工业出版社,2000.
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