Mishra Bibhudatta, Pattnaik Monalisa
Dept. of Electrical Engineering, National Institute of Technology, Rourkela, Odisha, India.
Dept. of Electrical Engineering, National Institute of Technology, Rourkela, Odisha, India.
ISA Trans. 2024 Oct;153:467-481. doi: 10.1016/j.isatra.2024.07.032. Epub 2024 Jul 26.
This paper introduces a novel droop-based decentralized control scheme to address the power-sharing challenges within a PV-fed islanded AC microgrid. This novel approach integrates both conventional (P-f/Q-V) and virtual impedance concepts to optimize and manage the precise distribution of active and reactive power among parallel operating inverters posing a significant research challenge. The conventional droop control methods encounter limitations such as voltage and frequency deviations and inaccuracies in power-sharing due to line impedance disparities. To overcome these limitations, the proposed solution integrates an enhanced virtual impedance control loop alongside the conventional control loop (P-f/Q-V). The efficacy of this approach is showcased through simulations conducted using the OPAL-RT OP4510 simulator within the MATLAB/Simulink platform. The Real-time simulation outcomes confirm the efficiency of the suggested control strategy, guaranteeing precise distribution of both active and reactive power while upholding stable voltage and frequency profiles within the system.
本文介绍了一种新颖的基于下垂控制的分散式控制方案，以解决光伏供电孤岛交流微电网中的功率分配挑战。这种新颖的方法整合了传统的（P-f/Q-V）和虚拟阻抗概念，以优化和管理并联运行逆变器之间有功和无功功率的精确分配，这是一个重大的研究挑战。传统的下垂控制方法存在局限性，如由于线路阻抗差异导致的电压和频率偏差以及功率分配不准确。为克服这些局限性，所提出的解决方案在传统控制回路（P-f/Q-V）的基础上集成了一个增强的虚拟阻抗控制回路。通过在MATLAB/Simulink平台上使用OPAL-RT OP4510模拟器进行的仿真展示了该方法的有效性。实时仿真结果证实了所建议控制策略的有效性，确保了有功和无功功率的精确分配，同时维持系统内稳定的电压和频率分布。
