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Self-Disciplined Nonsmooth Coordination Control for Battery Energy Storage System in Autonomous DC Microgrids Toward Large-Signal Stability
IEEE Transactions on Smart Grid ( IF 9.6 ) Pub Date : 2022-09-13 , DOI: 10.1109/tsg.2022.3206336
Jilin Lang 1 , Chuanlin Zhang 1 , Fei Xia 1 , Guodong Wang 2 , Xiangyu Wang 2
Affiliation  

For a Battery Energy Storage System (BESS)-based autonomous DC microgrid, owing to the coupling complexity between multiple control objectives under a hierarchical control framework, coordination control for large-signal stabilization is well-acknowledged as a non-trivial problem. This paper aims to present a self-disciplined nonsmooth coordination control strategy to address the multi-objective task within one framework. Firstly, a nonsmooth composite regulation law is designed to mitigate the increasing constant power loads (CPLs) by employing a feedforward compensation. Secondly, a dynamic droop strategy aiming for dynamic power allocation for state-of-charging (SOC) balancing of BESS is built based on a nonsmooth dynamic average consensus protocol with low communication cost. Then by utilizing a dynamic power allocation strategy and a large-signal stabilizer for each energy storage unit (ESU), both SOC dynamic balancing and system level large-signal stability can be ensured. Moreover, a fast performance recovery ability can be promised by bringing into two convergence rate coordination factors. Simulation and comparative experimental studies have demonstrated the efficacy of the proposed control strategy.

中文翻译:

自主直流微电网中电池储能系统的自律非光滑协调控制实现大信号稳定性

对于基于电池储能系统(BESS)的自主直流微电网,由于分层控制框架下多个控制目标之间的耦合复杂性,大信号稳定的协调控制被公认为是一个非常重要的问题。本文旨在提出一种自律的非光滑协调控制策略,以解决一个框架内的多目标任务。首先,设计了一种非光滑复合调节律,通过采用前馈补偿来减轻不断增加的恒定功率负载 (CPL)。其次,基于具有低通信成本的非光滑动态平均共识协议,构建了一种旨在实现电池充电状态(SOC)平衡的动态功率分配的动态下垂策略。然后通过为每个储能单元(ESU)使用动态功率分配策略和大信号稳定器,可以确保SOC动态平衡和系统级大信号稳定性。此外,通过引入两个收敛速度协调因素,可以保证快速的性能恢复能力。仿真和比较实验研究证明了所提出的控制策略的有效性。
更新日期:2022-09-13
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