【作者】 苏展；

【导师】 金新民；

【作者基本信息】 北京交通大学 ， 电气工程（专业学位）， 2015， 硕士

【摘要】 微网是对分布式电源的有效整合利用,微网按运行方式可以分为与大电网并联(并网)和独立运行(离网)两种模式,独立运行微网系统为海岛、边防和偏远山区等提供了供电可能。本文根据实际调研某边防哨所的基本情况,设计了基于混合储能的独立运行微网系统,包括系统设计,能量调度策略设计,并利用半实物实验平台对系统中的DC/DC变换器控制策略进行了实验验证。本文主要从以下三个方面展开研究。(1)对独立运行微网系统的架构形式和主要单元容量进行了选择。调研了某哨所的基本情况。分析了微网架构的几种基本形式并选择了交直流混合微网结构作为本文所设计的微网系统结构。对比分析了几种储能电池的储能特性,选择了磷酸铁锂电池与钛酸锂电池组成的混合储能系统作为系统储能单元。利用气象条件和负荷条件,结合混合储能的自身特点,完成了光伏池板、磷酸铁锂电池和钛酸锂电池的容量选择。(2)围绕双向DC/DC变换器和DC/AC变流器的单台控制方法和协调控制策略展开研究。介绍了DC/DC变换器和DC/AC变流器的工作原理,介绍了单台DC/DC变换器的电压电流双环和单电流环的控制方法,介绍了单台DC/AC变流器双环控制和PQ控制的控制方法,研究了多台DC/DC变换器的主从控制和对等控制的方法,利用Matlab搭建了由3台DC/DC和1台DC/AC组成的仿真系统,对两种系统控制方法进行了仿真验证。利用dSPACE1104搭建了多台DC/DC并联的半实物实验平台,通过实验验证了控制策略的有效性。(3)围绕含混合储能单元的独立运行微网系统的能量管理调度策略展开研究。研究了能量管理的整体结构,研究设计了功率分配和功率型电池SOC调整的方法,介绍了柴油发电机接入系统的能量管理思路,在Matlab中建立了系统的仿真模型,模拟24h的情况进行了仿真,验证了能量管理调度策略。更多还原

【Abstract】 Micro-grid has an effective integration of distributed generations (DGs). Micro-grid can work in grid connected mode or islanded mode. An islanded mode micro-grid system provide a power supply possible for the island, border post and remote mountainous areas. This thesis bases on the basic situation of an actual investigation of a border post. Design of an islanded mode micro-grid system based on hybrid energy storage system, including system design, energy management policy design. Use the hardware-in-the-loop experimental platform for experiments to verify the control strategy of DC/DC converter in the system. This thesis mainly launches the research from the following three aspects.Firstly, make a selection of architecture forms and the main unit of capacity of the island mode micro-grid system. The basic situation of the border post is investigated. This thesis analyzes several basic forms of architecture in micro-grid. The AC-DC hybrid micro-grid architecture form is chosen in this thesis. The storage characteristics of several storage batteries are comparative analyzed. The lithium iron phosphate battery and the lithium titanate battery are chosen as a unit of the hybrid energy storage system. With weather conditions and load conditions, consider its own characteristics of the hybrid energy storage system, this thesis complete capacity options of the photovoltaic cell panels, lithium iron phosphate and lithium titanate.Secondly, research the single control method and coordination control strategy of bidirectional DC/DC converter and DC/DC converter. This thesis describes the working principle of DC/DC converter and DC/DC converter. This thesis describes the control method for a single DC/DC converter of voltage and current double-loop control and single current loop control. This thesis also describes the control method for a single DC/AC converter of two-loop control and the PQ control. Master-slave control and peer-to-peer control of multiple DC/DC converters and DC/AC converters are studied. A simulation system is built using Matlab which consists of three DC/DCs and a DC/AC. And the two system control method is tested in the simulation. The hardware-in-the-loop experimental platform is built with the using of dSPACE1104and DC/DCs. Experiments show the effectiveness of the control strategy.Finally, this thesis researches the energy management policy of the islanded mode micro-grid system with the hybrid energy storage system. This thesis also researches the overall structure of energy management system. The energy management policy which is divided into power assignment and SOC adjustment of high power density battery. The simulation model of the system is built in Matlab. The simulation simulates24hours situations, and the results verify the energy management policy.更多还原