摘要
为了减少功率损耗和确保独立交直流混合微电网稳定运行,设计一种新的基于混合储能动态调节的分布式协调控制策略。通过检测直流电压和交流电压频率,该策略对连接交直流微电网的双向AC/DC变流器输出功率进行动态调节。混合储能中采用下垂控制自动调节蓄电池的输出功率,同时超级电容器迅速提供负荷功率的高频分量,以减小负载突变对蓄电池和母线电压造成的冲击。此外,在逆变器的下垂控制器中引入电压前馈补偿量来减小交流负荷的电压波动。最后,利用Matlab/Simulink搭建了混合微电网仿真模型。仿真结果表明,在不同工况下,该分布式控制策略均能控制混合微电网稳定运行及电压稳定。
The paper proposes a decentralized control strategy with hybrid storage system dynamical regulating to reduce power loss and assure the stable operation of the hybrid mierogrid. The strategy adaptively adjusts active power flow between AC and DC side through detecting DC bus voltage and AC frequency. The storage battery in the hybrid storage system provides active power using the droop control, and the super-capacitor rapidly provides high frequency component of the load fluctuation to reduce the impact on storage battery and DC bus. Besides, the paper designs voltage feedforward compensation in droop controller of load inverter to reduce AC voltage amplitude fluctuation. Finally, the hybrid AC/DC microgrid model is built on Matlab/Simulink, the simulation results indicate the proposed method can effectively maintain the hybrid microgrid stable operation and ensure voltage stability under different conditions. This work is supported by Scientific Research Project of Henan Province College（No. 16B140005）.
作者
范其丽
郑晓茜
王璞
冯越
FAN Qili1, ZHENG Xiaoxi1, WANG Pu2, FENG Yue2(1. Zhengzhou Technical College, Zhengzhou 450121, China; 2. State Grid Zhumadian Power Supply Company, Zhumadian 463000, Chin)
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2018年第7期105-114,共10页
Power System Protection and Control
基金
河南省高等学校重点科研项目资助(16B140005)~~
关键词
交直流混合微电网
分布式控制
混合储能
下垂控制
电压质量
hybrid AC/DC microgrid
decentralized control
hybrid storage system
droop control
voltage quality
