基于轨迹灵敏度的风电机组低电压穿越控制主导参数分析

Analysis of low voltage ride through control parameters for wind turbines based on trajectory sensitivity

摘要

随着风电装机容量的增加，风电机组并网对电力系统安全稳定运行的影响日益显著，低电压穿越能力是新能源系统故障后维持稳定的必要功能。为识别低电压穿越期间风电机组主导控制参数，提出一种基于轨迹灵敏度的主导参数分析方法。首先详细介绍了风电机组网侧换流器在低电压穿越期间的控制策略，并初步筛选出影响母线电压的无功控制参数；然后采用轨迹灵敏度提取参数与暂态电压之间的动态特征，构建评价指标以识别系统的主导参数；最后，在PSCAD/EMTDC软件中搭建相应的仿真模型，验证了分析的正确性。

Abstract

With the increase of wind power installed capacity, the impact of wind turbine integration on the safe and stable operation of the power system is becoming increasingly significant. Low voltage ride through capability is a necessary function for maintaining stability in new energy systems after faults. To identify the dominant control parameters of wind turbines during low voltage ride through periods, a dominant parameter analysis method based on trajectory sensitivity is proposed. Firstly, the control strategy of the wind turbine grid side converter during low voltage ride through period was introduced in detail, and the reactive power control parameters that affect the bus voltage were preliminarily screened. Then, trajectory sensitivity is used to extract dynamic features between parameters and transient voltage, and evaluation indicators are constructed to identify the dominant parameters of the system. Finally, a corresponding simulation model was built in PSCAD/EMTDC software to verify the correctness of the analysis in this paper.

关键词

新能源 / 低电压穿越 / 轨迹灵敏度 / 主导参数

Key words

new energy / low voltage ride through / trajectory sensitivity / main parameters

Author summay

魏 博(1987—), 男, 高级工程师, 硕士, 主要从事电力系统调度运行。E-mail: [e-mail]

基金资助

国网甘肃省电力公司科技项目(522722230050)