计及大功率驱动的电力电子化复杂电力系统谐波耦合机理分析与抑制方法研究

随着风能、太阳能等可再生能源利用的持续深化，柔性直流输电技术的深入发展，电动汽车和高铁的蓬勃兴起，电力电子技术在电力系统的广泛应用给电力系统的安全稳定运行带来了巨大的挑战，而其中的含大功率驱动的电网谐波分析与抑制则是当前亟需研究和解决的问题。课题首先对含大功率驱动复杂电网的拓扑结构和元件特性进行分析，建立能够精确表征含大功率驱动复杂电力系统的数学模型。然后，在能量耦合基础上探索含大功率驱动电网电气谐波和机械谐波的转换规律，深入分析器-网、器-器、网-网之间的交互作用，研究电力电子化复杂电网谐波产生和耦合机理。在此基础上，通过研究高效调控方法和优化技术来减小含大功率驱动电网中典型电力电子器件带来的谐波影响，并基于有限控制集模型预测电流控制FCS-MPCC理论提出一种具有良好鲁棒性的谐波控制方法。本课题的完成将从原理上解决含大功率驱动复杂电力系统谐波的产生和耦合问题，同时对工程设计提供指导。

With the continuous deepening of renewable energy utilization such as wind energy and solar energy, the in-depth development of flexible HVDC transmission technology, the booming of electric vehicles and high-speed train, the widespread application of power electronics technology in power systems has brought a lot of safety problems to power system. The harmonic analysis and suppression of the power grid with high power driver is the key issue that needs to be studied and solved immediately. The project firstly will analyze the topology and component characteristics of a complex power grid with high power driver, and establish a mathematical model that can accurately characterize complex power system. Then, on the basis of energy coupling method, the project will discover the conversion law of electrical harmonics and mechanical harmonics with high-power driver grid, analyze the interaction between converter-grid, converter-converter, and grid-grid, and study the harmonic generation and coupling mechanisms. Through the study of high-efficiency control methods and optimization techniques, a method is proposed to reduce the harmonic effects brought by typical power electronic devices in complex power system with high-power driver. At the same time, based on the finite control set model prediction current control FCS-MPCC theory, a robust control method for harmonics is explored. The completion of this project will solve the problems of the generation and coupling of harmonics in high-power-driver complex power system, and provide guidance for engineering design.