摘要
针对微电网由并网运行向非计划孤岛切换过程中功率出现不平衡的问题,在不改变分布式电源运行控制模式前提下,将超级电容器和蓄电池组成的复合储能装置作为微电网孤岛运行时的主电源。制定微电网并网转非计划孤岛切换控制策略,确保切换前后重要负荷正常供电和分布式电源正常运行;微电网由孤岛向并网运行切换时,通过对复合储能装置进行预同步控制,有效地减少了孤岛向并网运行切换时的冲击和振荡,确保运行模式切换过程中的平稳过渡。算例结果验证了所提方法的有效性。
In allusion to power imbalance during switching microgrid from grid-connected operation mode to non-plan island operation mode, under the premise of not changing the operation and control mode of distributed generations （DG） the complex energy storage device composed of super capacitor and battery is taken as the main power supply during the island operation of microgrid. A switching control strategy is drafted for the transition of operation mode of microgrid from grid-connected mode to non-plan island mode to ensure normal power supply for important load and normal operation of DGs before and after the transition; when the operation mode of microgrid is switched from island mode to grid-connected mode, the pre-synchronizing control is applied to the complex energy storage device to effectively lessen the impact and oscillation during the switching process. The effectiveness of the proposed control method and storage is verified by PSCAD/ EMTDC based simulation results of the switching process between the two operation modes of microgrid.
出处
《电网技术》
EI
CSCD
北大核心
2013年第4期906-913,共8页
Power System Technology
基金
国家863高技术基金项目(2012AA050212)~~
关键词
微电网
非计划孤岛
超级电容器
复合储能
切
换控制策略
预同步控制
micro-grid
non-plan island
super capacitor
complex energy storage
switching control strategy
pre-synchronizing control
