综合观测浮标波浪能供电系统混合储能控制方法  

Hybrid Energy Storage Control Method for Wave Energy Power Supply System in Comprehensive Observation Buoys

作　　者：刘旭[1] 陈震[1] 刘臻[1] 黎明[1] LIU Xu;CHEN Zhen;LIU Zhen;LI Ming(College of Engineering,Ocean University of China,Qingdao 266500,China)

机构地区：[1]中国海洋大学工程学院,山东青岛266500

出　　处：《水下无人系统学报》2024年第6期989-999,共11页Journal of Unmanned Undersea Systems

基　　金：国家重点研发计划项目(2022YFC3104200);泰山产业领军人才项目(TSLS20231203).

摘　　要：波浪能是一种持续性好、分布范围广的绿色可再生能源,可以为综合观测浮标持续性供电,但波浪变化速度较快,能量峰均比较高,需要通过混合储能系统平滑其能量波动,以便可靠地向电力负载供电。混合储能系统需要兼顾功率密度和能量密度特性,能量管理策略对于充分利用不同器件的特性、延长系统的寿命至关重要。文中重点研究了波浪能供电中储能系统能量分配和功率控制方法,提出了一种基于深度确定性策略梯度的混合储能系统功率分配和控制策略,旨在保持母线的稳定并充分发挥蓄电池与超级电容2种储能技术的优势。仿真实验和实物试验证明了所提策略可使蓄电池充放电功率峰值大幅降低,母线电压纹波被控制在1.6%以下,显著提高了波浪能供电系统的稳定性。Wave energy is a widely distributed green renewable energy source capable of providing continuous electrical power to comprehensive observation buoys.However,its rapid fluctuations and high peak-to-average ratio require hybrid energy storage systems to smooth out its energy fluctuations for a reliable electrical load supply.These hybrid energy storage systems need to balance power and energy density characteristics,and energy management strategies are important for fully utilizing the characteristics of different devices and extending the system’s lifespan.This paper focused on energy distribution and power control methods of energy storage systems in wave energy supply and proposed a power distribution and control strategy for hybrid energy storage system based on deep deterministic policy gradient(DDPG),so as to maintain bus stability and leverage the advantages of two energy storage technologies of batteries and supercapacitors.Simulation and physical experiments demonstrate that this strategy greatly reduces peak battery charge/discharge power,keeps bus voltage ripple below 1.6%,and significantly enhances the stability of the wave energy power supply system.

关 键 词：综合观测浮标 波浪能 混合储能 深度确定性策略梯度 

分 类 号：TJ630[兵器科学与技术—武器系统与运用工程] U230[交通运输工程—道路与铁道工程]