改善风电场群并网地区电压稳定的无功协调控制的研究  

RESEARCH OF REACTIVE POWER COODINATED CONTROL TO IMPROVE VOLTAGE STABILITY IN ON-GRID REGION OF CLASTERED WIND FARMS

作　　者：王振浩[1] 葛津铭 李国庆[1] 陈洪涛 

机构地区：[1]东北电力大学电气工程学院,吉林132012 [2]松原供电公司,松原138000

出　　处：《太阳能学报》2017年第4期983-990,共8页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51377016)

摘　　要：研究一种旨在提高风电场群并网地区的电压稳定的电压无功协调控制方法,通过控制各风场的无功输出,维持接入点电压稳定。提出包含综合灵敏度信息的风电场的电压修正方程,该方程通过雅可比矩阵的降阶方法可消去对电压影响较小的风场远区的有功功率波动,得到更为精确的无功/电压灵敏度。依次选取具有较大的灵敏度系数的风场作为补偿节点参与系统的无功调节,计算无功调整量的分配,在满足运行约束条件的情况下,能有效降低网络损耗。同时考虑不同类型补偿设备的特性,充分利用每个风场的无功补偿设备的无功调节能力完成电压无功协调控制。基于RT-LAB数模仿真实验平台,搭建某实际风电系统仿真模型,通过对风速扰动和负荷跌落两种情况下仿真实验,验证控制方法的准确性和有效性。A reactive power coordinated control strategy to improve voltage stability in on-grid region of clustered wind farms by controlling the reactive output of each wind farm and keeping voltage stability in connection point was studied. The voltage correction equation with comprehensive sensitivity information of wind farm was proposed to eliminate active power fluctuation in far away region which had little effect on voltage by means of decrement method of Jacobian matrix, and get the more precise reactive power/voltage sensitivity. The network loss could be effectively reduced with the satisfy of the running constraint conditions by the ways of choosing the wind farm with larger sensitivity coefficient as the compensation node which would take part in reactive power coordination of the system, calculate the distribution of coordinated quantity of reactive power. Considering the characteristics of different compensation equipment at same time, fully using the reactive power coordinated capacity of the different compensation equipment of each wind farm to complete reactive power coordinated control of voltage. The simulation model of a practical wind turbine system was established based on RT-LAB numerical simulation platform. The accurate and effectiveness of control method were verified through simulation experiment in two situations, wind speed variations and load drop.

关 键 词：风电场群 无功功率 电压 灵敏度 协调控制 

分 类 号：TM614[电气工程—电力系统及自动化]