超级电容器储能系统在两端供电直流微网中的电压控制方法研究

为了更充分地利用分布式电源的发电出力，最大限度发挥超级电容器的技术经济性，提出了两端供电的干线式直流微网结构，指出超级电容器储能系统在直流微网的优势与作用，并根据超级电容器储能系统配置地点来选择控制方法，电源端配置采用电压分段控制，负荷端配置采用恒压控制。在Matlab/Simulink平台上搭建包含超级电容器储能系统的直流微网模型，分析超级电容器储能系统配置位置对直流微网电能质量的影响。仿真结果表明超级电容器储能系统能有效地抑制负荷波动或光照变化引起的电压大幅变化。

Research on Voltage Control of a Ultracapacitor in a DC Micro-Grid System with Two-Terminal Supply

In order to take full advantages of distributed power production and the technological and economic characteristics of ultracapacitor, this paper presents a DC micro-grid structure with two supply terminals. It describes functions and advantages of ultracapacitor energy storage system in DC a microgrid and selects different control methodologies according to the placement of ultracapacitor energy storage system. The power supply terminal uses voltage segment control and the load side being constant voltage control. A simulation model of DC micro-grid with an ultracapacitor energy storage is built based on MATLAB/simulink platform, and an analysis is carried out to analyze the impact of the location of ultracapacitor energy storage system on the power quality of a DC micro-grid. The simulation results show that the ultracapacitor energy storage system can effectively restrain the voltage fluctuation caused by the changes of light or load.