Robust Feedback Control of Power Systems With Solar Plants and Composite Loads

Due to the rapid developments in synchronized measurement technologies, there exist enormous opportunities to attenuate disturbances in future power grids with high penetration of renewables and complex load demands. To that end, this article investigates the effectiveness of new robust feedback controllers for interconnected power systems with advanced power electronics-based models of photovoltaic (PV) power plants, composite load dynamics, and detailed higher-order synchronous generator models. Specifically, we design new, advanced control-theoretic wide-area controllers to improve the transient stability of nonlinear differential-algebraic models. Thorough simulation studies are carried out to assess the performance of the proposed controllers. Several fundamental questions on the proposed controllers' computational complexity and disturbance attenuation performance are raised and addressed. Simulation results demonstrate that with the proposed controllers as a secondary control layer, the overall transient stability and system robustness against load and renewables disturbances/uncertainties can be significantly improved compared to the state-of-the-art.

由于同步测量技术的快速发展，在具有高比例可再生能源和复杂负荷需求的未来电网中，存在大量减弱干扰的机会。为此，本文研究了新型鲁棒反馈控制器对具有基于先进电力电子的光伏（PV）电站模型、复合负荷动态以及详细高阶同步发电机模型的互联电力系统的有效性。具体而言，我们设计了新的、先进的控制理论广域控制器，以提高非线性微分 - 代数模型的暂态稳定性。进行了全面的仿真研究以评估所提出控制器的性能。提出并解决了关于所提控制器的计算复杂性和干扰减弱性能的几个基本问题。仿真结果表明，与现有技术相比，将所提出的控制器作为二级控制层，整体暂态稳定性以及系统针对负荷和可再生能源干扰/不确定性的鲁棒性能够得到显著提高。