针对多能互补的直流微电网光储系统中的光伏电池的随机性、不确定性问题，通过无源控制（Passivity Based Control，PBC）方法与滑模控制（Sliding Mode Control，SMC）结合构成PBC-SMC控制的复合控制器，在此基础上设计储能变换器，提出电流内环采用PBC控制方案使得系统满足能量耗散定律自动收敛，为补偿电流精度电压外环采用SMC控制的双闭环控制方案。通过光照突变、负载突变以及二者同时突变的情况下仿真对比了PBC控制器和PBC-SMC控制器的性能，验证PBC-SMC复合控制的有效性，确保光伏—储能直流微电网系统具有优良的稳态性能和动态性能，提升了微网持续供电能力。
英文摘要:
For the characters of strong randomness and uncertainty of PV cells in the multi-energy complementary DC micro-grid optical storage system, this paper adopts a compound controller combing passive based control (PBC) method with sliding mode control (SMC) to form a PBC-SMC controller. On this basis, the energy storage converter is designed, and the PBC control scheme for the inner-loop current is proposed to make the system automatically converge to meet the energy dissipation law, and the SMC double closed-loop control scheme for the outer-loop voltage is proposed to compensate the current precision. The performance of PBC controller and PBC-SMC controller is compared through simulation under the conditions of sudden light changes, sudden load changes, and both sudden changes. The effectiveness of PBC-SMC compound control is verified to ensure that the independent photovoltaic-energy storage system has excellent steady-state performance and dynamic performance, and the continuous power supply ability of the micro-grid is improved.