融合储能的光伏发电系统并网逆变器建模与稳定性分析  

Modeling and stability analysis of a photovoltaic grid-connected inverter integrated with an energy storage system

作　　者：沈赋 李施伟 王健 付玉 杨光兵 张微 翟苏巍 SHEN Fu;LI Shiwei;WANG Jian;FU Yu;YANG Guangbing;ZHANG Wei;ZHAI Suwei(Faculty of Electric Power Engineering,Kunming University of Science and Technology,Kunming 650500,China;Electric Power Research Institute,Yunnan Power Grid Co.,Ltd.,Kunming 650217,China)

机构地区：[1]昆明理工大学电力工程学院,云南昆明650500 [2]云南电网有限责任公司电力科学研究院,云南昆明650217

出　　处：《电力系统保护与控制》2024年第19期131-143,共13页Power System Protection and Control

基　　金：国家自然科学基金项目资助(52107097);云南省兴滇英才支持计划项目资助(KKRD202204021);云南省应用基础研究计划项目资助(202101BE070001-061,202201AU070111);昆明理工大学高层次人才平台建设项目资助(KKZ7202004004)。

摘　　要：以新能源为主体的新型电力系统中,大量电力电子器件接入系统,导致其暂态行为改变且拓扑结构状态变量阶数变高。针对上述问题,基于下垂控制方法建立了融合储能的光伏发电系统并网逆变器模型,采用奇异摄动降阶理论与变量梯度法构建了其李雅普诺夫函数。然后,将构建的李雅普诺夫函数与等面积法则相结合,分析了储能系统的接入对新能源系统功角稳定的影响,同时验证了储能系统对光伏系统出力支撑以及出力波动的抑制能力。最后,基于Matlab仿真结果对融合储能的新能源系统特性进行了分析和验证。When a large number of power electronic devices are connected to a system,this results in changes in their transient behavior and an increase in the order of the topological structure state variables in a new power system dominated by new energy.A grid-connected inverter model for photovoltaic generation systems incorporating energy storage based on droop control methodology is established,and its Lyapunov function is constructed using singular perturbation reduction theory and the variable gradient method.Then,the influence of energy storage system integration on the power angle stability of new energy systems is analyzed by combining the constructed Lyapunov function with the equal area criterion.Additionally,the capability of energy storage systems to support system output and suppress fluctuations in photovoltaic system output is verified.Finally,the characteristics of integrated energy storage in new energy systems are analyzed and validated based on Matlab simulation results.

关 键 词：光储融合 并网逆变器 奇异摄动 李雅普诺夫函数 功角稳定 

分 类 号：TM464[电气工程—电器] TM615