不平衡电网下MMC-UPFC的反演-滑模控制策略
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上海电力大学

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国家自然科学基金(62303301);上海市电站自动化技术重点实验室(13DZ2273800)


Backstepping-based Sliding-mode Control Strategy of MMC-UPFC Under Unbalanced Power Grid
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    摘要:

    针对模块化多电平变流器(Modular Multilevel Converter, MMC)-统一潮流控制器(Unified Power Flow Controller, UPFC)潮流跟踪性能优化问题,本文提出了一种基于MMC-UPFC的反演-滑模控制(Backstepping-based Control – Sliding-mode Control, BSB-SMC)非线性策略,它既保留了滑模控制(Sliding-Mode Control, SMC)的抗干扰能力强等性能,也兼具反演控制(Back-Stepping Control, BSC)响应速度快等优点。首先,根据MMC-UPFC的拓扑结构,建立数学模型;其次,提出了MMC-UPFC在不平衡条件下BSB-SMC控制器;最后,搭建MMC-UPFC仿真模型进行仿真验证,通过把本文所提BSB-SMC控制策略与BSC、SMC、PID 3种控制策略进行比较,验证了在3种不同工况下本文所提BSB-SMC控制策略的有效性和优越性。

    Abstract:

    Aiming at the power flow tracking performance optimization problem of Modular Multilevel Converter (MMC)-Unified Power Flow Controller (UPFC), a BackStepping-Based Sliding-Mode Control (BSB-SMC) nonlinear strategy based on MMC-UPFC is proposed in this paper. The BSB-SMC retains the strong anti-interference ability of sliding mode control (SMC), and it also has the advantages of fast response speed of Back Stepping Control (BSC). Firstly, according to the topology of MMC-UPFC, the mathematical model of MMC-UPFC is established; Nest, a BSB-SMC controller for MMC-UPFC is designed under unbalanced conditions, and the stability is demonstrated; Fi-nally, a MMC-UPFC simulation system is established for simulation verification, by comparing the proposed BSB-SMC control strategy with BSC, SMC, and PID control, the effectiveness and superiority of the BSB-SMC control strategy is verified under three different working conditions.

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  • 收稿日期:2024-01-03
  • 最后修改日期:2024-05-17
  • 录用日期:2024-05-17
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