地铁牵引系统的稳定性提升控制  

Stability improvement control for metro traction drive system

作　　者：林文立[1] 刘志刚[2] 孙大南[2] 方攸同[1] 

机构地区：[1]浙江大学电气工程学院,浙江杭州310027 [2]北京交通大学电气工程学院,北京100044

出　　处：《电机与控制学报》2012年第2期56-61,共6页Electric Machines and Control

基　　金："十一五"国家科技支撑计划重点项目(2006BAG02B06;2007BAA12B07)

摘　　要：在地铁牵引传动系统研制及试验中,发现了逆变器交直流侧电压/电流振荡这一不稳定现象。为研究主电路参数与系统稳定性之间的关系,建立牵引系统在额定点处的小信号等效电路模型,得到了保证系统稳定的关系式。为抑制交直流振荡、提升系统稳定性,在传统牵引电机磁场定向矢量控制的基础上,增加了振荡抑制和时延补偿两个环节:前者通过主动提高直流侧系统阻尼以抑制振荡,后者则通过对转子磁链位置实时校正和d-q轴电流的完全解耦实现广义的时延补偿,二者均采用根轨迹法进行系统稳定性的分析与验证。最后在广州地铁1号线进行了装车试验,采用稳定性提升控制策略前/后的试验波形对比验证了其有效性。During the procedure of developing and testing metro traction drive system,the unstable phenomenon that current and voltage oscillations in AC and DC sides of traction inverter often occurs is found.To study the relationships between main circuit parameters and system stability,a small-signal equivalent circuit model for metro traction drive system was built in the nominal working zone,and the stability expressions were obtained.To eliminate the current oscillations in DC and AC sides and improve the system stability,two modules including oscillation eliminating and time-delay compensation were added in the traditional induction motor field oriented control strategy.The former actively increased the systematic damping,and the latter real-time regulated the motor rotor field position and completely decoupled d-q axis current.Both adopted the root locus method to perform the system stability analysis and verification.Finally,experiments were undertaken in Guangzhou metro line 1,and the effectiveness of the present control strategy is proved by the waveforms comparison.

关 键 词：地铁牵引 稳定性 振荡抑制 时延补偿 根轨迹法 

分 类 号：TM92[电气工程—电力电子与电力传动] U66[交通运输工程—船舶及航道工程]