基于自适应反步滑模的变速抽蓄机组调速系统控制

Control of Variable Speed Pumped Storage Unit Speed Regulation System Based on Adaptive Backstepping Sliding Mode

目前变速抽蓄机组多数采用变流器/交流励磁控功率方式,存在功率快速变化引起转速反向超调的问题,且传统调速器难以保证良好的控制效果,影响变速机组运行效率。为研究变速机组有功功率调节下调速系统控制,提出了自适应反步滑模控制(ABSMC)的变速抽蓄机组的调速系统。首先,建立包含最优转速模块的变速抽蓄机组调速系统数学模型;其次,将电磁功率作为系统扰动,设计了变速抽蓄机组调速系统的自适应反步滑模控制器,并进行稳定性分析;最后,搭建变速抽蓄机组调速系统仿真试验平台,开展了在发电工况功率给定下变速抽蓄机组转速的动态响应仿真分析。与滑模控制器(SMC)、PID控制器对比结果表明,ABSMC控制的机组转速反向超调小,调节时间短,跟踪最优转速效果理想,验证了所设计控制器的有效性。

At present,most variable-speed pumped-storage units use converters(AC excitation) to control power.There is a problem of reverse speed overshoot caused by rapid power changes,and the traditional governors are difficult to ensure good control effects,which affects the operating efficiency of variable-speed units.In order to study the control of the speed regulation system under the active power regulation of the variable speed unit,the speed regulation system of the variable speed pumped storage unit with adaptive backstepping sliding mode control(ABSMC) was proposed.Firstly,a mathematical model of the variable-speed pumped-storage unit speed control system including the optimal speed module was established.Secondly,taking the electromagnetic power as the system disturbance,an adaptive backstepping sliding mode controller for the variable-speed pumped-storage unit speed control system was designed and its stability was analyzed.Finally,a simulation test platform for the speed regulation system of the variable speed pumped storage unit was built,and the dynamic response simulation analysis of the speed of the variable speed pumped storage unit was carried out under the given power of the power generation condition.Compared with the sliding mode controller(SMC) and PID controller,the results show that the reverse overshoot of the controlled unit speed by the ABSMC is small,the adjustment time is short,and the effect of tracking the optimal speed is ideal.The effectiveness of the designed controller was verified.