劳焕景;张黎;宋鹏程;赵彤;邹亮;

• 1:山东大学电气工程学院

摘要(Abstract)：

持续攀升的风电渗透水平为电力系统频率稳定控制带来了挑战。作为对策,虚拟惯性控制通常被补充到风机控制中以利用风机转子动能为电网调频服务。然而在吞吐转动惯量参与调频后风机风能捕获效率会因转子转速偏离最大功率跟踪状态而降低。为此,提出一种考虑最优状态动态恢复的风电持续调频策略。该策略采用变系数下垂控制来管理风机转动惯量:一方面,下垂系数变化上限阈值由风机存储的转动惯量决定,以确保风机转速收敛于稳定运行区间内;另一方面,将下垂系数与电网频率变化率耦合,随着电网频率渐近稳定而逐渐解除附加的风机惯性控制以恢复转子转速。此外,赋予风机直流环节频率响应能力并通过自适应积分控制来有序重建其额定电压。仿真结果表明,所提策略的动态恢复特性提高了持续调频下双馈风机的发电效率、转子转速运行裕度和其直流环节持续参与调频的能力,并能有效兼顾风机的惯性响应。

关键词(KeyWords)： 动态恢复;发电效率;高风电渗透水平;持续调频;风能

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 劳焕景;张黎;宋鹏程;赵彤;邹亮;

Email:

DOI: 10.13335/j.1000-3673.pst.2020.0265a

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