电气工程学报 ›› 2019, Vol. 14 ›› Issue (3): 16-22.doi: 10.11985/2019.03.003

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基于EL模型的光储微网无源控制器设计 *

孙石涛,王久和,李萍,杨继鑫   

  1. 北京信息科技大学 北京 100085
  • 收稿日期:2019-05-08 出版日期:2019-09-25 发布日期:2019-11-21
  • 作者简介:孙石涛,男,1994年生,硕士。主要研究方向为多变换器系统稳定性控制。E-mail:1820765652@qq.com|王久和,男,1959年生,博士,教授。主要研究方向为电能变换器非线性控制和电能质量控制及微电网。E-mail:wjhyhnwm@163.com
  • 基金资助:
    * 国家自然科学基金(51777012);国家自然科学基金(51477011);北京市自然科学基金-教委联合资助项目(KZ201911232045)

Design of Passive Controller for Optical Storage Microgrid Based on EL Model

SUN Shitao,WANG Jiuhe,LI Ping,YANG Jixin   

  1. Beijing Information Science and Technology University, Beijing 100085 China
  • Received:2019-05-08 Online:2019-09-25 Published:2019-11-21

摘要:

针对光储微电网在光照强度变化及负载扰动时电压波动大,甚至不稳定情况等,设计了基于欧拉-拉格朗日(Euler-Lagrange,EL)模型的无源控制器。首先,给出了光储微网的系统结构,并分析了双向DC-DC变换器在充、放电时的两种工作状态;然后,通过建立光储微网控制系统的EL模型,从能量的角度描述系统,并采用注入阻尼法设计了双向DC-DC变换器无源控制器。当光照条件良好时,光伏电池不仅能够满足负载的供电需求,还会将剩余电能通过双向DC-DC变换器储存至蓄电池;当光照条件较弱时,可以通过双向DC-DC变换器将蓄电池中的电能反向提供给负载,保证负载的正常供电,并且在光照强度及负载发生变化时系统能够稳定高效运行。最后,通过 Matlab/Simulink 搭建光储微电网系统模型的仿真,验证了所提控制策略的可行性和正确性。

关键词: 光储微网, 无源控制, 阻尼注入, 双向DC-DC变换器

Abstract:

A passive controller based on Euler Lagrangian (EL) model is designed to solve the problem of large voltage fluctuation and even instability in optical storage microgrid under the condition of light intensity change and load disturbance. Firstly, the system structure of optical storage microgrid is given, and two working states of bidirectional DC-DC converter are analyzed. Then, by establishing the EL model of optical storage microgrid control system, the system is described from the point of view of energy, and the passive controller of bidirectional DC-DC converter is designed by injection damping method. When the lighting condition is good, the photovoltaic cell can not only meet the power supply demand of the load, but also store the remaining energy into the battery through the bidirectional DC-DC converter. When the lighting condition is weak, the electric energy in the battery can be provided to the load reverse through the bidirectional DC-DC converter to ensure the normal power supply of the load, and the system can run stably and efficiently when the light intensity and load change. Finally, the feasibility and correctness of the control strategy proposed are verified by the simulation of the optical storage microgrid system model built by Matlab/Simulink.

Key words: Optical storage microgrid, passive control, damping injection, bidirectional DC-DC converter

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