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首页> 外文期刊>Renewable Power Generation, IET >Fast terminal sliding mode control for improved transient state power sharing between parallel VSCs in an autonomous microgrid under different loading conditions
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Fast terminal sliding mode control for improved transient state power sharing between parallel VSCs in an autonomous microgrid under different loading conditions

机译：基于不同负载条件下的自主微电网中并联VSC之间的改进的瞬态状态电力共享的快速终端滑模控制

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摘要

For low-voltage autonomous microgrids, the essential goal is maintaining stable voltage and frequency throughout its network for the smooth operation of distributed loads. The other goal is to maintain proportionate power-sharing between multiple sources connected through voltage source converters (VSCs). For the particular case of a heavily loaded microgrid, any further increase in demand poses new problems. The VSCs proximate to the loads may overshoot beyond its maximum ratings. Owing to which the stability of the power supply, as well as the longevity of VSCs, may get compromised. Also, these sources provide power under varying composite loading conditions comprising both linear and non-linear loads resulting in unbalancing in its network. To overcome these problems, a decentralised fast terminal sliding mode control strategy for active power-sharing between parallel VSCs has been proposed. A detailed mathematical model based on Lyapunov's stability theory-based study is designed to establish the operating stability of the proposed controller. To validate the proposed control strategy, MATLAB-based simulation results are provided for possible loading scenarios. A comparative study for performance evaluation between the proposed controller and a conventional proportional -integral-based controller is further carried out. Finally, the performance of the proposed controller is also validated in real-time scenario.
机译：对于低压自主微电网，基本目标在其网络中保持稳定的电压和频率，以进行分布式负载的平稳操作。另一个目标是在通过电压源转换器（VSC）连接的多个源之间保持比例的功率共享。对于大量加载的微电网的特定情况，需求的任何进一步增加都会带来新问题。靠近负载的VSC可能超出其最大额定值。由于电源的稳定性以及VSC的寿命可能会受到损害。而且，这些源在不同的复合装载条件下提供了具有线性和非线性载荷的功率，导致其网络中不平衡。为了克服这些问题，已经提出了一种分散的快速终端滑动模式控制策略，用于平行VSC之间的有效功率共享。基于Lyapunov稳定性理论研究的详细数学模型旨在建立所提出的控制器的操作稳定性。为了验证所提出的控制策略，提供了基于MATLAB的仿真结果，用于可能的加载方案。进一步执行了所提出的控制器与常规比例 - 孤独的控制器的性能评估的比较研究。最后，建议的控制器的性能也在实时方案中验证。

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