A new type of brushless DC motor has been developed by using a square wave rare earth permanent magnet synchronous motor with its double loop control circuit. The double loop control scheme of the drive system yie...A new type of brushless DC motor has been developed by using a square wave rare earth permanent magnet synchronous motor with its double loop control circuit. The double loop control scheme of the drive system yields a combination of desired characteristics including simplified control structure, small ripple torque, high speed accuracy, wide operating speed range, and fast dynamic response. Experimental results confirm excellent characteristics of the motor.展开更多
在独立运行直流微电网中,由于接入大量电力电子变换装置,系统惯性较低,阻尼较小,系统稳定性较差,同时,新能源和负载的功率波动将引起母线电压波动,严重时会影响直流微电网的稳定运行。为增强系统惯性,本文研究基于参数自适应改进虚拟直...在独立运行直流微电网中,由于接入大量电力电子变换装置,系统惯性较低,阻尼较小,系统稳定性较差,同时,新能源和负载的功率波动将引起母线电压波动,严重时会影响直流微电网的稳定运行。为增强系统惯性,本文研究基于参数自适应改进虚拟直流电机(virtual DC motor,VDCM)控制策略,提升母线电压暂态稳定性。介绍虚拟直流电机控制原理,建立储能控制系统的小信号模型,深入分析虚拟转动惯量、阻尼系数和电压调节器比例、积分参数对系统稳定性影响,以及母线电压波动过程中各波动阶段对参数大小的需求。在此基础上,建立虚拟转动惯量、比例系数和积分系数与母线电压偏差的函数关系式。根据电压偏差动态调节VDCM和电压调节器参数,缩短电压的扰动恢复时间的同时减小电压波动。通过搭建的RTDS和RCP硬件在环实验系统,验证所提控制策略的正确性与可行性。展开更多
文摘A new type of brushless DC motor has been developed by using a square wave rare earth permanent magnet synchronous motor with its double loop control circuit. The double loop control scheme of the drive system yields a combination of desired characteristics including simplified control structure, small ripple torque, high speed accuracy, wide operating speed range, and fast dynamic response. Experimental results confirm excellent characteristics of the motor.
文摘在独立运行直流微电网中,由于接入大量电力电子变换装置,系统惯性较低,阻尼较小,系统稳定性较差,同时,新能源和负载的功率波动将引起母线电压波动,严重时会影响直流微电网的稳定运行。为增强系统惯性,本文研究基于参数自适应改进虚拟直流电机(virtual DC motor,VDCM)控制策略,提升母线电压暂态稳定性。介绍虚拟直流电机控制原理,建立储能控制系统的小信号模型,深入分析虚拟转动惯量、阻尼系数和电压调节器比例、积分参数对系统稳定性影响,以及母线电压波动过程中各波动阶段对参数大小的需求。在此基础上,建立虚拟转动惯量、比例系数和积分系数与母线电压偏差的函数关系式。根据电压偏差动态调节VDCM和电压调节器参数,缩短电压的扰动恢复时间的同时减小电压波动。通过搭建的RTDS和RCP硬件在环实验系统,验证所提控制策略的正确性与可行性。
