电力系统及其自动化学报2016，Vol.28Issue(11)：25-31,43,8.DOI:10.3969/j.issn.1003-8930.2016.11.005
计及LVRT撬棒电路的双馈感应风电机组动态等值
Dynamical Equivalence to DFIGs Considering LVRT Crowbar Circuit
摘要
Abstract
The motor structure is changing when low voltage ride through(LVRT)occurs. The inconsistent crowbar ac⁃tion due to the difference between units brings difficulty to the traditional equivalence method,and its equivalence ef⁃fect is poor. The impact of wind farm on large power grid is mostly related to the dynamic characteristics of its export. In order to improve the equivalence considering LVRT,in this paper,an equivalent model of wind farm is established from the perspective of export characteristics while ignoring its internal structure. The oscillation modes of voltage and current at the wind farm export are analyzed using Prony algorithm. The major oscillation modes are selected to simulate export characteristics by defining the energy ratio,which represents the degree of influence. The effect is compared with that by analyzing amplitude and attenuation of oscillation modes,indicating that this method is more accurate and it re⁃duces the requirement of model order. The rationality and validity of the equivalent model is verified by simulation con⁃sidering LVRT.关键词
双馈感应电机/动态等值/Prony算法/低电压穿越/振荡模式/能量比/出口特性Key words
doubly-fed induction generator(DFIG)/dynamical equivalence/Prony algorithm/low-voltage ride-through (LVRT)/oscillation mode/energy ratio/export characteristics分类
信息技术与安全科学引用本文复制引用
朱婷涵,李生虎,马燕如,鲍正杰..计及LVRT撬棒电路的双馈感应风电机组动态等值[J].电力系统及其自动化学报,2016,28(11):25-31,43,8.基金项目
国家自然科学基金资助项目 （）
