【作者】 张勇；

【导师】 李永刚； 窦青春；

【作者基本信息】 华北电力大学 ， 工程硕士（专业学位）， 2017， 硕士

【摘要】 随着经济的高速发展,能源匮乏和环境污染问题越来越严重,太阳能以其无污染、无限制性等特点成为了人们关注的对象,光伏发电成为全球研究的重要课题。但是光伏发电具有一定的波动性和不可控性,供电可靠性较差,对系统的稳定性带来不利影响。由于储能具有快速吞吐能量的特性,是提高光伏发电可控性程度的有效方法,本文根据蓄电池和超级电容器两者之间的特性,提出超级电容器蓄电池混合储能系统,并对光储联合发电系统的控制策略进行了研究。论文首先介绍光储联合发电系统的工作原理,在其基础上建立了基于外特性的光储联合发电的数学模型;其次对光伏发电设计了Boost升压法的MPPT控制方法实现了最大功率跟踪,并通过对双向DC/DC变换器控制实现了电池所需功率吞吐,采用PI控制改变变换器的占空比的方式来跟踪最大功率点的目标的、参考电流,提高了储能单元的性能,同时针对系统中含光伏电池、超级电容器和蓄电池三种能量源的特点,提出相应的能量管理策略;最后对提出的光储联合发电系统的控制策略进行了仿真验证,结果表明混合储能系统能在外界环境发生变化时可以快速保持直流母线电压平衡,同时可以减小蓄电池容量配置,延长系统使用寿命。更多还原

【Abstract】 With the rapid development of economy,energy shortage and environmental pollution problem more and more aroused people’s attention,the solar energy for its characteristics such as no pollution,no restrictive became the object of attention,photovoltaic power generation to become the research important topic.However,PV has some volatility and not controllable,poor reliability.The energy storage is an effective method of improving controllability of PV,due to its fast throughput electricity.In this paper,according to the characteristics of between battery and super capacitor,super capacitor hybrid battery energy storage system is proposed,and its control strategy is analyzed.This paper introduces the PV-ES array principles and work,building the molding,according to external characteristics.Then,in order to maintain the PV array can always guarantee the maximum power output control method designed MPPT Boost law.Contribute to the instability of the impact of PV system is running against an energy storage system to do a detailed analysis of each of the batteries and super capacitors were analyzed,through the bidirectional DC/DC converter using PI control the duty cycle of the inverter changes to change the way the storage elements to improve the performance of the charge-discharge current of the energy storage unit.While for the system features including photovoltaic cells,super capacitors and batteries three energy sources,the corresponding energy management strategy,the basic idea is based on the work status of photovoltaic cells and hybrid energy storage devices to ensure the system set up in the three converter under the given operating mode,making the system three power coordination to ensure stability of the system.Finally,the control strategy of PV-ES is verified through simulation,and the results show that the hybrid energy storage system can be quickly balanced to maintain the DC bus voltage changes in the external environment,while reducing the battery capacity can be configured to extend the life of the system.更多还原