为解决新能源发电与负荷的随机波动引起的直流母线以及负荷侧直流电压的波动,提出一种虚拟直流电机控制技术。针对直流母线侧与负荷侧将虚拟直流电机控制技术分为虚拟直流发电机(virtual direct current generator,VDG)技术与虚拟直流...为解决新能源发电与负荷的随机波动引起的直流母线以及负荷侧直流电压的波动,提出一种虚拟直流电机控制技术。针对直流母线侧与负荷侧将虚拟直流电机控制技术分为虚拟直流发电机(virtual direct current generator,VDG)技术与虚拟直流电动机(virtual direct current motor,VDM)技术。虚拟直流电机控制技术将直流电机的机械方程与电动势平衡方程应用到控制算法当中,模拟直流电机的惯量特性与阻尼特性,使得在新能源发电波动以及负荷突变时直流母线电压与负荷侧电压仍能保持稳定。建立虚拟直流电机控制的小信号模型,分析系统的稳定性。为有效应对负载突变时直流母线电压跌落的问题,将扩张状态观测器(extended state observer,ESO)引入至虚拟直流发电机控制中。在PSCAD/EMTDC环境下进行仿真研究,仿真结果证明所提控制方法的正确性和有效性。该文所提控制方法为解决新能源与负荷随机波动所造成的电压波动问题提供了新的思路。展开更多
In order to obtain the primary parameters and operating characteristics of a DC motor without directly measuring its torque and rational speed, it is proposed to use a PC and a data acquisition card to acquire both th...In order to obtain the primary parameters and operating characteristics of a DC motor without directly measuring its torque and rational speed, it is proposed to use a PC and a data acquisition card to acquire both the dynamic and static data of armature current to establish the performance of a DC permanent magnet motor. The accuracy and validity of this virtual test system proposed were verified by comparing the measurements made with the system proposed with the measurements made with conventional torque meters. It is concluded from the results of comparison that from the mathematic model established for the DC permant magnet motors, both major parameters and operating characteristics can be directly established for the DC motors without measuring their torques and rotational speed, a perfect on line measurement and test system has been established for the DC permanent magnet motors using the theory of virtual test system. The system proposed features shorter test time, higher efficiency and lower cost.展开更多
文摘为解决新能源发电与负荷的随机波动引起的直流母线以及负荷侧直流电压的波动,提出一种虚拟直流电机控制技术。针对直流母线侧与负荷侧将虚拟直流电机控制技术分为虚拟直流发电机(virtual direct current generator,VDG)技术与虚拟直流电动机(virtual direct current motor,VDM)技术。虚拟直流电机控制技术将直流电机的机械方程与电动势平衡方程应用到控制算法当中,模拟直流电机的惯量特性与阻尼特性,使得在新能源发电波动以及负荷突变时直流母线电压与负荷侧电压仍能保持稳定。建立虚拟直流电机控制的小信号模型,分析系统的稳定性。为有效应对负载突变时直流母线电压跌落的问题,将扩张状态观测器(extended state observer,ESO)引入至虚拟直流发电机控制中。在PSCAD/EMTDC环境下进行仿真研究,仿真结果证明所提控制方法的正确性和有效性。该文所提控制方法为解决新能源与负荷随机波动所造成的电压波动问题提供了新的思路。
文摘In order to obtain the primary parameters and operating characteristics of a DC motor without directly measuring its torque and rational speed, it is proposed to use a PC and a data acquisition card to acquire both the dynamic and static data of armature current to establish the performance of a DC permanent magnet motor. The accuracy and validity of this virtual test system proposed were verified by comparing the measurements made with the system proposed with the measurements made with conventional torque meters. It is concluded from the results of comparison that from the mathematic model established for the DC permant magnet motors, both major parameters and operating characteristics can be directly established for the DC motors without measuring their torques and rotational speed, a perfect on line measurement and test system has been established for the DC permanent magnet motors using the theory of virtual test system. The system proposed features shorter test time, higher efficiency and lower cost.
