离网式三端口风光互补抽水切换策略研究
摘要:为解决风光随机波动性和间歇性给发电系统带来的干扰，基于三端口变换器设计离网式风光互补抽水系统，以风力发电系统和光伏发电系统作为系统输入电源端，异步电机抽水为系统负载端。首先，分别对风力发电系统、光伏发电系统及抽水系统建立数学模型，针对风光交替切换及同时切换的控制策略进行研究。其中，光伏侧采用优化变步长电导增量法，永磁同步电机与异步电机采用按转子磁链定向的矢量控制，通过异步电机电压外环控制直流母线电压，永磁同步电机转速外环控制系统功率，三端口变换器拓扑根据风光切换的变化情况也相应跟随改变，弥补了风光发电系统的不足，保证系统运行的稳定性，实现风光发电抽水和电能转化一体化的目标。最后，通过Matlab/Simulink软件搭建离网式三端口风光互补抽水系统的仿真模型，结果验证了模型设计的合理性及系统运行工作时切换策略的正确性和可行性。
Abstract：In order to solve the interference caused by random fluctuations and intermittence of wind and solar power on power generation systems, this paper designs an off-grid wind and solar complementary pumping system based on the three-port converter. The wind and photovoltaic power generation systems are used as input power supply of the system, and asynchronous motor pumping is used as load end of the system. Firstly, the mathematical models of wind power generation system, photovoltaic power generation system and pumping system are established respectively, and the control strategies of wind-solar alternate switching and simultaneous switching are studied. Among them, an optimized variable-step conductance increment method is employed on the photovoltaic side, and vector control based on rotor flux orientation is applied to the permanent magnet synchronous motor and asynchronous motor. The DC bus voltage is regulated by the outer loop control of the asynchronous motor voltage, and the system power is controlled by the outer loop speed control of the permanent magnet synchronous motor. The topology of the three-port converter varies with wind-solar switching. This compensates for the deficiency of the wind and solar power generation systems, ensures the stability of the system operation, and achieves the objective of integrating wind and solar pumping with energy conversion. Finally, a simulation model of the off-grid three-port wind and solar complementary pumping system is built using Matlab/Simulink software. The results validate the rationality of the model design and the correctness and feasibility of the switching strategy during system operation.
标题：离网式三端口风光互补抽水切换策略研究
title:Research on Off-Grid Three-Port Wind-Solar Complementary Pumping Switching Strategy
作者：张祥祥,罗振鹏,张思清,杨宝峰,王慧慧,韩相越,李燃
authors:ZHANG Xiangxiang,LUO Zhenpeng,ZHANG Siqing,YANG Baofeng,WANG Huihui,HAN Xiangyue,LI Ran
关键词：离网式,三端口变换器,风光互补,抽水,切换策略,
keywords:off-grid type,three-port converter,wind-solar complementary,pumping,switching strategy,
发表日期：2024-04-01
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