海洋能集成供电系统储能技术的研究

发布时间：2018-04-10 06:14

本文选题：海洋能　切入点：储能　出处：《华北电力大学》2014年硕士论文

【摘要】：海洋能的发电功率随着外界环境和气候条件的改变而发生变化,具有不可预测性,为了使发电机即使在负荷波动较快或者系统达到峰荷时都能够运行在一个稳定的电能输出水平,可以在供电系统中加入相匹配容量的储能装置。使得发电机即使在负荷波动较快或者系统达到峰荷时都能够运行在一个稳定的电能输出水平。本文依靠“海上波浪能与风能互补发电平台的研发”和“300kW海洋能集成供电系统研究与示范”这两大项目,在考虑对比了各个储能装置各自的特征及优缺点后,确定了铅酸蓄电池和超级电容器作为两大项目中的储能装置。首先,本文研究了供电系统中铅酸蓄电池的各种充放电方法,在进行了对比分析后,决定采用变电流充电方法为蓄电池进行充电,采用放电深度控制方法对蓄电池进行放电管理,利用Matlab/SIMULINK平台建立包括储能系统的发电系统仿真模型,并进行了仿真分析,仿真结果证明了所设计的控制算法能够有效地避免蓄电池的过充与过放,极大的延长了蓄电池的使用寿命。其次,本文研究设计了基于蓄电池储能的风浪互补供电系统结构,由三相永磁发电机、不控整流、Boost升压斩波器、储能控制系统、逆变器构成,设计了供电系统的控制方案,基于Matlab/SIMULINK仿真平台建立无储能的供电系统与加入储能的供电系统的仿真模型,仿真比较结果表明,加入蓄电池储能装置的供电系统,电压、频率相比无储能系统更加稳定,满足负载变动对于功率以及电能质量的要求。最后,本文针对多个发电机输出的海洋能供电系统设计了由蓄电池组和超级电容器构成的混合储能系统,该系统通过双向变流器接入交流母线中,通过滤波器将发电机输出功率分为高频和低频部分,分别由超级电容和蓄电池承担,蓄电池采用恒流充电和恒压充电相结合的控制方法,超级电容器采用双环闭环控制,外环功率环,内环电流环,从而使超级电容器输出功率跟随设定值,由Matlab/SIMULINK仿真结果可以看出,该控制方法可以实现蓄电池组大范围储能,超级电容器削峰填谷,支撑瞬时电压的功能。
[Abstract]:the power generation power of the ocean energy changes with the change of the external environment and the climatic conditions , and has the non - predictability , so that the energy storage device with matching capacity can be added in the power supply system in order to enable the generator to operate at a stable electric energy output level even when the load fluctuation is fast or the system reaches the peak load , so that the generator can operate at a stable electric energy output level even when the load fluctuation is fast or the system reaches the peak load .

Based on the research and demonstration of offshore wave energy and wind energy complementary power generation platform and research and demonstration of 300kW ocean energy integrated power supply system , this paper considers the characteristics and advantages and disadvantages of each energy storage device , and determines lead - acid storage battery and super capacitor as energy storage devices in two large projects .

Firstly , the charging and discharging methods of lead - acid batteries in power supply system are studied . After the comparative analysis , the method of variable current charging is used to charge the storage battery . The simulation model of the power generation system including the energy storage system is established by using the Matlab / Simulink platform , and the simulation analysis is carried out . The simulation results show that the designed control algorithm can effectively avoid the overcharge and excessive discharge of the storage battery , and greatly prolong the service life of the storage battery .

Secondly , the structure of the wind wave complementary power supply system based on battery energy storage is designed . The control scheme of power supply system is designed by three - phase permanent magnet generator , non - controlled rectifier , Boost step - up chopper , energy storage control system and inverter . The simulation results show that the power supply system , voltage and frequency added to the storage battery of storage battery are more stable than the energy storage system .

finally , a hybrid energy storage system consisting of a storage battery pack and a super capacitor is designed aiming at the ocean energy power supply system output by a plurality of generators ; the system is connected with an alternating current bus through a bidirectional converter ; the output power of the generator is divided into a high frequency and a low frequency part by a filter ;

【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM612;P743

【参考文献】