基于RTDS的柔性互联装置控制策略的仿真研究

Simulation Study on the Control Strategy of Flexible Interconnection Device Based on RTDS

近年来微电网飞速发展,能源互联网快速发展,各电网之间的并联运行是大势所趋,因此并网技术备受关注。本文提出了一种用于微电网之间、微电网与大电网之间并网运行的柔性互联装置,文章首先介绍了柔性互联装置的拓扑结构、工作原理及功能优势;然后分析了现有控制策略,提出一种以PI控制为基础的电流矢量控制策略及运行模式,最终在RTDS系统上搭建柔性互联装置的仿真模型,试验证明:装置可以实现多个非同步电网的快速并网且冲击小,并联运行时,潮流方向和大小灵活控制,具备无功补偿功能和良好的隔离性,提高电网电能质量。

In recent years,with the rapid development of micro-grid and grid-connection,the parallel operation between each grid is the general trend and therefore the grid-connection technology is getting much attention.In this paper,a kind of flexible interconnected device for the grid connection operation between the micro-grids and between the micro grid and big power grid.In this paper,the topological structure,working principle and function advantage of the device are introduced firstly,then,the existing control strategy is analyzed and a kind of current vector control strategy and operation mode with PI control as the base is proposed.Finally,the simulation model of the flexible interconnection device is set up on the RTDS system.It is proved by the test that in case of parallel operation,the device can realize the connection of multiple nonsync hronous power grid and the impaction is small,the direction and magnitude of power flow is flexible and has the function of reactive compensation with good isolation to improve the quality of power grid.