一种适用于风力机组复杂阵风工况的非线性控制策略  

A Nonlinear Control Strategy for Wind Turbines under Complex Extreme Wind Conditions

作　　者：杨翀 王瑞良 孙勇 李涛 徐伊丽 Yand Chong;Wang Ruiliang;Sun Yong;Li Tao;Xu Yili(Zhejiang Windey Co.,Ltd.,Hangzhou 310012,China;Key Laboratory of Wind Power Technology of Zhejiang Province,Hangzhou 310012,China)

机构地区：[1]浙江运达风电股份有限公司,杭州310012 [2]浙江省风力发电技术重点实验室,杭州310012

出　　处：《机电工程技术》2021年第8期170-172,共3页Mechanical & Electrical Engineering Technology

摘　　要：针对极端阵风工况机组出现过速停机,造成机组载荷增大的问题,在传统的PID动态控制基础上,增加了一个以减少超速为目的非线性控制策略。在风速和风向骤变的工况下,通过探测转速动态特征,以适当增加桨距角的方式避免机组过速停机,同时合理地触发阈值设置,保证其不影响正常发电工况机组运行。用实际机组进行了仿真验证,结果表明,非线性控制策略能够有效地解决极端阵风工况机组超速停机问题,降低了风电机组塔底极限载荷,并保证在正常运行期间不增加机组疲劳载荷。A nonlinear control strategy was added to the traditional PID control strategy, aiming to address the overspeed and extreme loads during extreme coherent gust condition. Under the wind conditions of extreme coherent gust with direction change, a nonlinear pitch angle demand was triggered by dynamic characteristics of generator speed to avoid overspeed. Besides, a suitable threshold of dynamic characteristics of generator speed was designed to prevent the nonlinear feature from being triggered during normal turbulent wind conditions. Simulation proves that the nonlinear control strategy can effectively avoid overspeed and reduce extreme loads during extreme coherent gust and keep fatigue loads unchanged during normal turbulent wind conditions.

关 键 词：风力机组 极端阵风 控制策略 载荷优化 

分 类 号：TM315[电气工程—电机]