变速抽水蓄能机组自启动过程控制策略

Self-Starting Process Control Strategy of Variable Speed Pumped Storage Unit

变速抽水蓄能机组在电动状态下运行时,传统启动方式存在需要额外的启动装置,以及测速编码器会降低控制系统可靠性的问题。采用定子绕组短接的控制策略,实现了机组的自启动,避免附加设备的使用,节约机组建造成本;采用模型参考自适应算法,估算机组的转子转速和位置角,实现了无位置传感器控制。仿真结果表明,采用的自启动方案是有效、可行的,转速和位置角估计误差在可接受范围内。

When the variable speed pumped storage unit operates under electric state,there are problems that the traditional starting mode requires additional starting device,and the speed measuring encoder will reduce the reliability of the control system.In the paper,control strategy of stator winding short circuit was adopted to realize the selfstarting of the unit,avoid the use of additional equipment and save the construction cost of the unit;The model reference adaptive algorithm was used to estimate the rotor speed and position angle of the unit,and the sensorless control was realized.The simulation results show that the self-starting scheme is effective and feasible,and the estimation errors of speed and position angle are within the acceptable range.