一种具有储能功能的新型电气制动装置研究

Research on a new type of electric braking device with supercapacitor energy storage functions

基于超级电容储能原理,具有储能功能的水轮机组电气制动装置,即超级电容储能制动装置(Super Capacitor energy storage Brake Device,SCBD),SCBD可以在发电机故障情况下甩负荷时用于调节发电机转子动能量,以提高机组暂态运行的稳定性,还可在发电机正常停机过程中用于制动发电机转子,辅助水轮机组快速停机。为了验证SCBD在水轮机组暂态运行中所起的作用,采用微分代数多指标非线性控制(Differential Algebraic Multi-index Nonlinear Control,DAMNC)方法对水轮机励磁系统与SCBD进行非线性协调控制设计。仿真结果表明:SCBD具有良好的电气制动效果,明显提高了系统暂态稳定性,动态、静态性能均能得到很好协调。

Based on the principle of super capacitor energy storage, this paper presents a new type of electric braking device for hydraulic turbine with energy storage function, i.e. the Super Capacitor Energy Storage Brake Device （SCBD）. SCBD can be used to adjust the dynamic energy of the generator rotor when the generator is under load in case of generator fault, so as to improve the stability of the hydraulic turbine transient operation, and can also be used for braking the generator rotor during the normal shutdown of the generator and assisting turbine shutdown quickly. In order to verify the SCBD function in turbine transient operation, this paper uses Differential Algebraic Multi-index Nonlinear Control （DAMNC） method to design the nonlinear coordinated control system for turbine excitation system and SCBD device. The simulation results show that the SCBD has a good electric braking effect, obviously improves the transient stability of the system, and well coordinates both the dynamic and static performance.