摘要
针对光伏系统参与电网频率响应需要有功功率储备的要求,提出一种光伏系统的降功率运行方法。该方法通过控制光伏系统使其工作在偏离最大功率点的条件下,可在光伏系统内部实时保持一部分有功功率上调能力,在不需要外加储能装置的情况下也能够按照实际需求释放或缩减光伏有功输出,从而起到与储能系统相同的作用。由于在降功率运行过程中光伏系统的可用最大功率未知,该研究使用高斯-赛德尔结合朗伯函数的方法对光伏最大功率进行精准预估,同时提出一种P-V曲线修正方法,使电压工作点始终位于P-V曲线的右侧,以获取更大的功率调节范围和更快的响应速度,最后在Matlab/Simulink里建立相应的仿真模型对所提方法进行验证。
Aiming at the requirement to participate in power grid frequency response,photovoltaic generators(solar) system needs power energy storage. This paper proposes a photovoltaic system power reserve control method. By controlling the photovoltaic system to operate at a deviation station from the maximum power point,the method can maintain a part of the active power up-regulation capability within photovoltaic system in real time,and can increase or decrease the photovoltaic active output according to actual demand without adding an external energy storage device. Thus the method has the same functions as the energy storage system. Since the maximum available PV power during the power reserve control mode is unknown,this work uses the Gauss-Seidel combined with the Lambert W function to accurately estimate the maximum PV power,at the same time,a P-V curve correction method is proposed to keep the voltage working point on the right side of the P-V curve,so as to obtain greater power adjustment range and faster response speed. Finally,the corresponding simulation model is established in Matlab/Simulink to verify the proposed method.
作者
包广清
谭宏涛
丁坤
高鹏飞
汪宁渤
Bao Guangqing;Tan Hongtao;Ding Kun;Gao Pengfei;Wang Ningbo(College of Electrical and Information Engineering,Lanzhou University of Technology,Lanzhou 730050,China;State Grid Gansu Electric Power Corporation Wind Power Technology Center,Lanzhou 730070,China;Gansu Provincial Key Laboratory of New Energy Grid Operation Control,Lanzhou 730070,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2020年第12期90-96,共7页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51967012)
国家电网公司科技项目(NSGGSKY00FJJS1700303)
甘肃省教育厅科研创新团队项目(2018C-09)。
关键词
光伏系统
频率响应
功率储备
降功率
有功备用
最大功率估计
曲线修正
photovoltaic generators
frequency response
power storage
power reduction
power reserve control
active power reserve
maximum power estimation
curve correction
