Bumpless Optimal Control over Multi-Objective Microgrids with Mode-Dependent Controllers

Bumpless Optimal Control over Multi-Objective Microgrids with Mode-Dependent Controllers
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使用模式相关控制器对多目标微电网进行无扰优化控制

DOI:
10.3390/en12193619
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发表时间:
2019-09
期刊:
影响因子:
3.2
通讯作者:
Wu Yanpeng
Wu Yanpeng
中科院分区:
工程技术4区
文献类型:
--
作者:
Wu Ying;Guerrero Josep M.;Vasquez Juan C.;Wu Yanpeng

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To avoid transient jumps at the switching time between two operating modes in microgrids, this paper proposes a linear quadratic-based optimal bumpless controller with two degrees of freedom (DOF) to suppress the transient disturbance and realize seamless switching between mode-dependent controllers. By minimizing the transient performance criteria, which contains both the reference tracking error and the controller tracking error, this bumpless algorithm not only effectively forces the latent controller to track the active controller, but also guarantees the plant output track the reference as close as possible. For the different control objectives of the two modes, a current-based networked PI controller is proposed in islanded mode to achieve power sharing, as well as suppressing circulating current, and a power-based PI controller is designed in grid connected mode to supply required P and Q, as well as effectively synchronize f and v safely with the main grid. A microgrid test system with two operation modes was built in Matlab/Simulink. Several operating cases were executed to verity the feasibility and effectiveness of this optimal bumpless control strategy.
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