Hierarchical Control Based Energy Management Method for Photovoltaic-Energy Storage- Fuel Cell DC Generation System

被引：0
|
作者：
Xue H. [1 ]
Hu Y. [1 ]
Dong B. [1 ]
Wang Y. [1 ]
机构：
[1] College of Electrical Engineering, Shanghai University of Electric Power, Shanghai
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2018年 / 42卷 / 21期
基金：
上海市自然科学基金; 中国国家自然科学基金;
关键词：
Differential flatness; Hybrid energy storage; Model prediction; Photovoltaic;
D O I：
10.7500/AEPS20170909006
中图分类号：
学科分类号：
摘要：
In order to overcome the random and intermittent of photovoltaic (PV) power generation, realize the high reliability and quality of power supply, a hierarchical control method based on photovoltaic/storage battery/super capacitor/fuel cell (FC) DC generation system is proposed. For the multi-parameter and non-linear characteristic of hybrid DC power supply system, the control of upper layer designs differential flatness method to compensate non-linear components directly, which realizes the non-linear dynamic reversibility of system, makes the DC bus voltage still stable under situations of great changes of PV output, loads and system parameters. Meanwhile, the upper layer provides reference track for total load current to lower layer. Aiming at different characteristics of multiple power sources in the hybrid DC power supply system, the control of lower layer utilizes model prediction method to design weighting factors to extend cycle life of the system. According to the conditions of photovoltaic output and load demand, the charging and discharging rate of storage unit is dynamically adjusted, which makes the system immediately track the current expectation of total loads to achieve the reasonable distribution of power in various sources. Based on the MATLAB/Simulink, the simulation results show the feasibility and effectiveness of proposed method, which has simple structure, rapid response, high robustness and good stability. © 2018 Automation of Electric Power Systems Press.
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页码：53 / 62
页数：9
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