电源学报2024，Vol.22Issue(4)：152-162,11.DOI:10.13234/j.issn.2095-2805.2024.4.152
考虑故障穿越和时变延迟的孤岛微网电压功率控制
Voltage and Power Control of Isolated Island Microgrid Considering Fault Crossing and Time-varying Delay
摘要
Abstract
To solve the instability problem caused by time-varying communication delay and uncertain faults in an isolated island AC microgrid,a novel robust hierarchical control method is proposed,which includes cascade current loop,voltage loop,virtual impedance and droop control loop.First,a robust controller based on adaptive backward integral non-singular fast terminal sliding mode control is designed in the current loop to adjust and track the current reference value under unknown bounded uncertainties and external disturbances.Second,the hybrid H2/H∞ control is used in the voltage loop,and the state feedback control law is used to generate the inner loop reference value to increase the robustness of the controller to disturbances,and sufficient conditions are given based on the linear matrix inequalities.Considering the unstable effects of time-varying delay(TVD),a distributed protocol based on consistency is adopted in the second control layer to improve the robustness of the controller against TVD.Third,droop control and virtual impedance loop are used to improve the system's power distribution accuracy.Finally,the performance of the proposed control method was evaluated by hardware-in-the-loop simulation,and its effectiveness was verified.Simulation results show that compared with the existing methods,the proposedmethod has advantages in transient response,steady-state performance and fault crossing capability under large and small signal disturbances.关键词
自适应控制/滑模控制/分布式发电/混合H2/H∞/鲁棒控制/时变延迟Key words
Adaptive control/sliding mode control/distributed generation/mixed H2/H∞/robust control/time-varying delay(TVD)分类
信息技术与安全科学引用本文复制引用
曹德发,王彬,李志华,马明,陈诚伟,周哲民..考虑故障穿越和时变延迟的孤岛微网电压功率控制[J].电源学报,2024,22(4):152-162,11.基金项目
中国南方电网公司科技资助项目(GDKJXM20200321)This work is supported by Science and Technology Project of China Southern Power Grid Corporation under the grant GDKJXM20200321 （GDKJXM20200321）
