基于RTDS的两种SVG阻抗扫描方法

Two SVG Impedance Scanning Methods Based on RTDS

大量新能源装置接入电网的同时,伴随着大量电压源型变流器(VSC)的接入,这将对电网的动态特性产生显著的影响。特别在弱电网中,电力电子装置间、与电网间的交互作用,导致宽频振荡问题频发,对电网的稳定运行造成严重的威胁。本文通过搭建RTDS半实物仿真模型,结合SVG控制器,编写两种SVG阻抗扫描程序,分析SVG在各扰动频段的响应及可能存在的宽频振荡风险,为进一步抑制宽频振荡提供准确的阻抗扫描数据。

At the same time as a large number of new energy devices are connected to the power grid,a large number of voltage source converters(vsCs)are connected,which will have a significant impact on the dynamic characteristics of the power grid.Especially in weak current networks,the interaction between power electronic devices and the power grid leads to frequent broadband oscillation problems,posing a serious threat to the stable operation of the power grid.In this paper,by building the RTDS hardware in the loop simulation model and combining with the SvG controller,two SVG impedance scanning programs are written to analyze the response of svG in each disturbance frequency band and the possible risk of broadband oscillation,so as to provide accurate impedance scanning data for further suppressing broadband oscillation.