考虑主轴疲劳载荷的虚拟同步双馈风电场有功功率分布式优化方法  

Distributed Optimization Method for Active Power of Virtual Synchronous Doubly-fed Wind Farm Considering Main Shaft Fatigue Load

作　　者：王瀚博 刘颖明[1] 王晓东[1] 郭国先 王黎明 王瑛玮 WANG Hanbo;LIU Yingming;WANG Xiaodong;GUO Guoxian;WANG Liming;WANG Yingwei(School of Electrical Engineering,Shenyang University of Technology,Shenyang 110870,Liaoning Province,China;School of Electrical Engineering and Automation,Harbin Institute of Technology,Harbin 150001,Heilongjiang Province,China)

机构地区：[1]沈阳工业大学电气工程学院,辽宁省沈阳市110870 [2]哈尔滨工业大学电气工程及自动化学院,黑龙江省哈尔滨市150001

出　　处：《电网技术》2024年第9期3643-3652,I0036,I0037,共12页Power System Technology

基　　金：辽宁省“揭榜挂帅”科技攻关专项(2021JH/10400009)。

摘　　要：为降低风电场内各台基于虚拟同步发电机控制策略的双馈风电机组在响应电网功率指令值变化时所承受的主轴疲劳载荷,提出一种基于改进惩罚系数的交替方向乘子法的考虑主轴疲劳载荷的有功功率分布式优化方法。在推导可量化表征机组有功功率指令值与其主轴力矩之间关系的离散化模型基础上,以各台机组的主轴力矩波动总和最小作为目标函数,并根据机组运行状态设定目标函数的约束条件。为分担风电场中央控制器的计算压力,基于改进惩罚系数的交替方向乘子法将目标函数拆解为主函数(中央控制器)和多个子函数(本地控制器)的分布式优化结构,各本地控制器通过在线优化各台机组有功功率指令值以实现主轴疲劳载荷的降低。最后,仿真结果验证了所提优化方法的优越性。To reduce the main shaft fatigue load borne by each doubly-fed wind turbine based on a virtual synchronous generator control strategy in the wind farm when responding to changes in grid power demand values,a distributed optimization method for active power considering main shaft fatigue load based on an improved penalty coefficient alternating direction multiplier method is proposed.Based on the derivation of a discretized model that quantifies the relationship between the active power demand value of a unit and its main shaft torque,the objective function is to minimize the total fluctuation of the main shaft torque for each unit and constraint conditions are set according to the operating status of the unit.To share the computational pressure of the central controller of the wind farm,the objective function is disassembled into a distributed optimization structure with a main function(central controller)and multiple sub-functions(local controllers)based on the alternating direction multiplier method with improved penalty coefficient,and the local controllers optimize the value of the active power demand of each unit online to achieve the reduction of the main shaft fatigue load.The simulation results verify the superiority of the proposed optimization method.

关 键 词：风电场 主轴疲劳载荷 虚拟同步发电机 改进惩罚系数的交替方向乘子法 分布式优化方法 

分 类 号：TM614[电气工程—电力系统及自动化]