Nithara P V, Anand R, Ramprabhakar J, Meena V P, Padmanaban Sanjeevikumar, Khan Baseem
Department of Electrical and Electronics Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Bengaluru, India.
Department of Electrical Engineering, National Institute of Technology Jamshedpur, Jharkhand, 831014, India.
Sci Rep. 2024 Nov 16;14(1):28325. doi: 10.1038/s41598-024-79405-z.
A DC microgrid with renewable energy sources can achieve reduced current ripple, higher efficiency, faster dynamics, high voltage gain, and less operational stress by interfacing with an interleaved boost converter (IBC). The stability of an IBC linked to a DC microgrid supplying a constant power load (CPL) can be imperceptibly guaranteed by a conventional controller. A tightly regulated CPL with nonlinear and negative incremental impedance characteristics will lead to stability issues. Uncertainties such as load and line variations will further affect the stability of the system. A nonlinear passivity-based control algorithm requires more attention than a traditional controller to achieve the stability of power converters. This article explains the Brayton-Moser (BM) passivity-based controller (PBC) for a 2-level interleaved boost converter (IBC) interfaced DC microgrid with CPL. The suggested controller can achieve high signal stability by injecting a series-connected virtual impedance. The stability of the proposed controller has been assessed using the Lyapunov stability approach. A BM passivity-based controller for a 2-level IBC with CPL has been derived and investigated under various operating modes using MATLAB and Simulink. It was also observed that the proposed system achieves at least improvement in efficiency and reduction in current ripple. To evaluate the performance of BM Passivity-based controller, a comparative analysis was performed between the suggested controller and the traditional PI controller, which is also included in this paper.
一个带有可再生能源的直流微电网通过与交错式升压变换器（IBC）接口，可以实现降低电流纹波、提高效率、加快动态响应、获得高电压增益以及减轻运行压力。与连接恒定功率负载（CPL）的直流微电网相连的IBC的稳定性，可以由传统控制器在不知不觉中得到保证。具有非线性和负增量阻抗特性的严格调节的CPL会导致稳定性问题。诸如负载和线路变化等不确定性会进一步影响系统的稳定性。与传统控制器相比，基于非线性无源性的控制算法需要更多关注才能实现功率变换器的稳定性。本文阐述了用于连接CPL的两级交错式升压变换器（IBC）直流微电网的布雷顿-莫泽（BM）无源性控制器（PBC）。所建议的控制器通过注入串联虚拟阻抗可以实现高信号稳定性。已使用李雅普诺夫稳定性方法评估了所建议控制器的稳定性。已推导并使用MATLAB和Simulink在各种运行模式下研究了用于带CPL的两级IBC的BM无源性控制器。还观察到所建议的系统在效率上至少提高了[X]，电流纹波降低了[X]。为了评估基于BM无源性的控制器的性能，在本文中还对所建议的控制器与传统PI控制器进行了对比分析。
