新能源电网中的谐波问题

Harmonic problems in a new energy power grid

谐波源与新能源电网之间的谐波交互作用对电力系统的可靠运行和新能源的消纳存在潜在的威胁。建立谐波源模型和分析谐波交互影响是抑制谐波振荡、提高电网稳定性和电能质量的技术基础。以建模方法原理和谐波交互影响机理为立足点,对新能源电网中的谐波分析与抑制问题进行综述。首先,按照建模方法的不同原理将谐波源建模分为两大类:机理建模和数据驱动建模,并逐一详细介绍不同方法的基本原理、优缺点和适用范围。随后,对新能源电网中的谐波交互影响分析和抑制方法进行讨论。最后,指出谐波分析与抑制技术在今后研究中亟待解决的问题及研究方向。

The interactions between the harmonic source and a new energy power grid are harmful to the reliable operation of a power system and new energy consumption.It is critical to establish the harmonic source models and analyze the harmonic interactions to improve grid stability and power quality.In this paper,the harmonic problems in a new energy power grid are reviewed based on the principle of the modeling method and the mechanism of the harmonic interaction.First,according to different principles of modeling methods,the harmonic source modeling methods are divided into two categories,i.e.,the mechanism and the data-driven modeling methods.The rationales,relative merits,and applications of different modeling methods are elaborated.Further,the harmonic interaction analysis and suppression methods are discussed.Finally,the current problems and future research orientations are introduced.