考虑谐波约束的光伏发电机组功率波动控制  

Power Fluctuation Control of Photovoltaic Generator Considering Harmonic Restraint

作　　者：周倩 王皓宇 闫湖 肖强 ZHOU Qian;WANG Haoyu;YAN Hu;XIAO Qiang(State Grid Chongqing Electric Power Company,Chongqing 410000,China;State Grid Energy Research Institute Co.,Ltd.,Beijing 102209,China;Electric Power Research Institute of State Grid Chongqing Electric Power Company,Chongqing 410000,China)

机构地区：[1]国网重庆市电力公司,重庆410000 [2]国网能源研究院有限公司,北京102209 [3]国网重庆市电力公司电力科学研究院,重庆410000

出　　处：《自动化与仪表》2023年第9期16-20,共5页Automation & Instrumentation

摘　　要：谐波权重对光伏发电机组功率影响很大,在对发电机组功率波动进行分析时,忽略谐波畸变率对波动控制的影响,会导致控制误差大、响应速度慢、功率波动控制效果不佳的问题,该文提出在考虑谐波约束下的光伏发电机组功率波动控制方法。通过分析光伏发电系统的内部结构,计算各部分系统在d、q轴上的动态方程,从而建立光伏发电机组系统模型。基于模型和非谐波源节点上的谐波畸变率确定谐波权重,并结合电机特性,通过比例积分控制方法实现光伏发电机组功率波动控制。对所提方法进行了功率响应实验,结果表明,所提方法对功率响应速度较快,功率波动控制效果更好,说明其能够更有效地实现光伏发电机组的功率控制与调节。The harmonic weight has a great impact on the power of the photovoltaic generator set.When analyzing the power fluctuation of the generator set,the influence of the harmonic distortion rate on the fluctuation control was ignored,resulting in large control error,slow response speed and poor power fluctuation control effect.The power fluctuation control method of photovoltaic generator unit considering harmonic constraint is proposed.By analyzing the internal structure of the photovoltaic power generation system and calculating the dynamic equations of each part of the system on the d,q axis,the system model of the photovoltaic power generation unit is established.Based on the model and the harmonic distortion rate on the anharmonic source node,the harmonic weight is determined,and combined with the motor characteristics,the proportional integral control method is used to achieve the power fluctuation control of photovoltaic generator set.In the experimental demonstration,the power response experiment of the proposed method is carried out.The results show that the proposed method has faster power response speed and better power fluctuation control effect,which indicates that it can more effectively realize the power control and regulation of photovoltaic generator sets.

关 键 词：谐波约束 光伏设备 发电机组 功率波动控制 

分 类 号：TM615[电气工程—电力系统及自动化]