新能源接入背景下的谐波源建模方法综述

大量接入可再生能源和逐步采用交直流混合网络已经成为现代电力系统的两大特征，随之而来的电网谐波问题日益突出。在此背景下，谐波源建模方法、谐波溯源方法以及谐波治理方法这三个难点问题越来越受到学术界和工业界的高度关注。综述了目前常见的谐波源建模方法，为电网谐波领域的理论研究和实践提供参考。从谐波源的机理性建模和数据驱动建模两个角度，对目前常见的谐波源时域建模方法和频域建模方法进行了梳理、分析和比较，归纳了各种建模方法的优势和不足，论述了各类谐波源建模方法的适用场景。其中，重点阐述了机理性建模方法和数据驱动建模方法存在的问题，并针对每个问题提出了对应的解决思路。最后，对常见谐波源建模方法的特点进行了归纳总结，对新能源接入背景下谐波源建模技术的发展方向进行了展望。

Review of harmonic source modeling methods with the background of renewable energy access

The large number of renewable energy sources and the gradual adoption of AC and DC hybrid networks have become two major characteristics of modern power systems. Along with this, the problem of harmonics in the power grid has become increasingly prominent. In this case, three difficult problems of harmonic source modeling, traceability and control methods have attracted increasing attention from both academia and industry. This paper reviews the current common harmonic source modeling methods, and uses them to provide references for theoretical research and practice in the field of power grid harmonics. From the perspectives of mechanism modeling and data-driven modeling of harmonic sources, the current common harmonic source time-domain modeling methods and frequency-domain modeling methods are described, analyzed and compared, and various modeling methods are summarized. The advantages and disadvantages of the method, as well as the applicable scenarios of various harmonic source modeling methods are discussed. It focuses on the problems of mechanism modeling and data-driven modeling methods, and proposes corresponding solutions for each problem. Finally, the characteristics of common harmonic source modeling methods are summarized, and the development direction of harmonic source modeling technology in the context of renewable energy access is prospected. This work is supported by the National Key Research and Development Program of China (No. 2017YFB0902800).