基于NI-PXI的分布式发电数模混合仿真系统

分布式发电(Distributed Generation,简称DG)技术是解决未来能源和环境问题的一个重要方向。这里提出一种分布式发电数模混合仿真系统的设计方案,用于分布式电源(Distributed Energy Resources,简称DERs)并网相关技术的研究。该方案采用NI-PXI为实时数字仿真平台完成分布式电源数字模型部分的实时计算,通过基于双PWM换流器的可控功率源模拟分布式电源的功率输出,作为混合仿真接口实现数字部分和物理部分之间信息交互,从而实现数/模混合实时仿真的目的。此处以双馈风力发电系统为例,验证了该方案的可行性,为研究分布式发电并网运行控制提供了良好、通用且便捷的实验平台。

Digital/Physical Hybrid Simulation System Based on NI-PXI for Distributed Generation

This paper proposes a design scheme of digital/physical hybrid simulation system for study of distributed energy resources integrated into grid,since the distributed generation(DG) technologies play an important role to al-leviate the energy and environment issues.In the scheme,real-time calculation of DG system model is executed on the NI-PXI platform,and a real controllable power source based on double-PWM convertors is used as a power interface between digital simulation and physical simulation.The power source feeds power into the simulated physical grid,which referres to the simulated power of the digital model.A wind power hybrid simulation system with double fed in-duction generator(DFIG) is performed to validate the scheme and the simulation results show that the experiment platform is feasible,universal and suitable for studying the operation and control of DG and its interaction with grid.