| 引用本文: | 薛贵挺,张 焰,祝达康.孤立直流微电网运行控制策略[J].电力自动化设备,2013,33(3): |
| XUE Guiting,ZHANG Yan,ZHU Dakang.Operational control strategy of stand-alone DC microgrid[J].Electric Power Automation Equipment,2013,33(3): |
|
| 摘要: |
| 以光伏阵列-燃料电池-超级电容所构成的低压单极型直流微电网为研究对象，在考虑分布式电源特性的基础上，研究该直流微电网的运行控制策略。采用开路电压比例系数法跟踪光伏阵列的最大功率；利用斜率限制器控制燃料电池功率的变化速度，防止“燃料饥饿”，进而改善燃料电池性能，提高其使用寿命；使用滑模控制实现超级电容的快充快放，稳定直流母线电压。在MATLAB／Simulink中搭建系统模型，仿真结果表明，所提控制策略可以提高能源利用率，改善系统的电能质量。 |
| 关键词: 直流微电网 光伏阵列 燃料电池 超级电容 变换器 控制 |
| DOI： |
| 分类号: |
| 基金项目: |
|
| Operational control strategy of stand-alone DC microgrid |
|
XUE Guiting1, ZHANG Yan1, ZHU Dakang2
|
|
1.Department of Electrical Engineering，Shanghai Jiao Tong University，Shanghai 200240，China;2.Shanghai Municipal Electric Power Company，Shanghai 200122，China
|
| Abstract: |
| A low-voltage unipolar-type DC microgrid composed of PVA（PhotoVoltaic Array），FC（Fuel Cell） and SC（Super-Capacitor） is studied and its operational control strategy considering the characteristics of DGs is researched. The open-circuit-voltage proportional-coefficient method is used to track the maximum power of PVA. The slope limiter is employed to limit the rate of FC power change for preventing the fuel starvation and improving its performance and lifetime. The sliding mode control is applied to SC for its rapid charging and discharging to stabilize the DC bus voltage. A system model is established with MATLAB／Simulink and the simulative results show that，the proposed control strategy increases the energy utilization efficiency and improves the power quality of system. |
| Key words: DC microgrid photovoltaic array fuel cells super-capacitor electric converters control |
