Analysis and elimination method of the effects of cables on LVRT testing for offshore wind turbines

International Conference on Energy Engineering and Environmental Protection 2017

能源学;生态环境科学

Jiang, Zimin^1 ; Liu, Xiaohao^1 ; Li, Changgang^1 ; Liu, Yutian^1

Key Laboratory of Power System Intelligent Dispatch and Control, Ministry of Education, Shandong University, Jinan

250061, China^1

关键词: Current limiting impedance;    Elimination method;    Low voltage ride through (LVRT);    On-site testing;    Short-circuit impedance;    Testing method;    Testing standards;    Testing systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/121/4/042022/pdf
DOI  :  10.1088/1755-1315/121/4/042022

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The current state, characteristics and necessity of the low voltage ride through (LVRT) on-site testing for grid-connected offshore wind turbines are introduced firstly. Then the effects of submarine cables on the LVRT testing are analysed based on the equivalent circuit of the testing system. A scheme for eliminating the effects of cables on the proposed LVRT testing method is presented. The specified voltage dips are guaranteed to be in compliance with the testing standards by adjusting the ratio between the current limiting impedance and short circuit impedance according to the steady voltage relationship derived from the equivalent circuit. Finally, simulation results demonstrate that the voltage dips at the high voltage side of wind turbine transformer satisfy the requirements of testing standards.