考虑电缆选型双馈机组分散协调控制对风电场无功优化影响  

The influence of decentralized and coordinated control of DFIG on reactive power optimization for wind farm considering cable selection

作　　者：吴杰[1] 师庆丹 李珊 温晨阳 WUJie;SHI Qingdan;LI Shan;WEN Chenyang(Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province,Yanshan University,Qinhuangdao 066004,China)

机构地区：[1]燕山大学电力电子节能与传动控制河北省重点实验室,河北秦皇岛066004

出　　处：《电力科学与技术学报》2020年第2期113-119,共7页Journal of Electric Power Science And Technology

摘　　要：随着技术发展,双馈式风力发电机成为风电场主流,风电场内部电压波动及网络损耗优化研究也越来越重要。该文基于风机位置的电缆选型,分析双馈机组的无功极限,充分利用风机无功调节能力,将每台风机无功出力、静止无功补偿装置无功出力作为连续控制变量,有载调压变压器分接头位置及风电场固定无功补偿器组数作为离散控制变量,建立综合考虑风电场有功网损和总电压偏差的目标函数,并通过线性递减权重粒子群算法进行分析,得到风电无功优化最优解。通过算例表明:考虑电缆选型的双馈式风力发电机分散协调控制能有效降低网损及电压波动。With the increasing of the wind power penetration,the network loss and voltage fluctuation of the wind farm is becoming more and more serious.In this paper,the cable selection based on the location of Doubly Fed Induction Generator(DFIG)is studied,and the DFIG's reactive power limit is analyzed.DFIG is commonly utilized to supply reactive power for power grid,thus,the reactive power of DFIG,the number of fixed reactive compensation device,the reactive power output of Static Var Compensator(SVC)and the on-load tap changing transformer tap are taken as the control variables.Then,the minimum objective function is established as the sum of total voltage deviation and active power loss of wind farm.The discrete variable is analyzed by employing the Linear decreasing Weight Particle Swarm Optimization(LinWPSO),and the optimal solution of reactive power optimization is successfully obtained.Finally,a case study is included for verification.It is shown that the decentralized and coordinated control of DFIG which considering cable selection can effectively reduce network losses and voltage fluctuations.

关 键 词：双馈式风力发电机 无功极限 电缆选型 无功优化 粒子群算法 

分 类 号：TM614[电气工程—电力系统及自动化]