全能型静止同步机及其实现

Versatile Static Synchronous Machine and Its Realization

随着非同步机电源在电力系统中的占比不断提升,迫切需要构造大量具有同步机性能的新能源电源,高压大容量逆变器结合电池储能系统是一种非常有潜力的解决方案。文中提出了全能型静止同步机的概念,并研究了各种功能的实现方法,首先结合模块化多电平换流器和电池储能系统提出了全能型静止同步机的两种拓扑。基于基本电路理论,提出了参考同步机的概念并且提出了参考同步机跟踪控制策略。介绍了全能型静止同步机交直流故障双向隔离的基本原理,并提出了详细的控制策略。最后,基于时域仿真软件PSCAD/EMTDC搭建了电磁暂态仿真模型,通过仿真验证了全能型静止同步机的同步机特性模拟和交直流故障双向隔离功能。

With the increasing proportion of the non?synchronous machine power source in power system,it is urgent to construct a large number of new energy source with synchronous machine performance.High voltage and large capacity inverter combined with battery energy storage system is a very promising solution.In this paper,the generic concept of the versatile static synchronous machine(VSSM)is proposed,and the method to realize the versatile functions is studied.Firstly,combined with the modular multilevel converter(MMC)and the battery energy storage system(BESS),two kinds of topology of the VSSM are proposed.On the basis of basic circuit theory,the concept of reference synchronous machine and the tracking control strategy of the reference synchronous machine are proposed.Then,the basic principle of bidirectional AC/DC fault isolation of VSSM is discussed,and the detailed control strategy is proposed.Finally,the electromagnetic transient simulation model is set up on the time domain simulation software PSCAD/EMTDC,and several important functions of the proposed VSSM is verified.