分布式新能源接入电网的谐波热点问题探讨

大规模分布式新能源经变流器接入电网,对电力系统谐波问题的分析研究带来了新的挑战。针对含分布式新能源的电网,准确检测谐波及间谐波,掌握谐波分布特性,定位谐波污染源头,划分谐波污染责任,揭示谐波传播及谐振机理,分析谐波不稳定现象是当前电力系统亟需解决的热点与难点问题。从谐波测量、谐波源定位及责任评估、谐波谐振及其不稳定等方面阐述了分布式新能源接入电网的谐波研究技术热点问题,并提出了未来大规模分布式新能源接入后的新的谐波研究趋势,为分布式新能源接入电网中的谐波问题研究提供了理论参考。

Discussion on Harmonic Hot Issues of Distributed New Energy Connected to Power Grid

As more distributed new energy being accessed to power grid, it has a great influence on the harmonic studies of power system. It is urgent to solve the harmonic issues of distributed new energy connected to the grid and detect the harmonics and inter harmonics accurately, figure out the distribution property of the harmonics, identify the harmonic sources and assess the harmonic responsibilities, as well as to reveal the mechanism of harmonic propagation and resonance and analyze the harmonic instability. Therefore, the harmonic hot issues of distributed generation connected to grid are described on aspects of harmonic measurement, harmonic identification, harmonic responsibility assessment, harmonic resonance and harmonic instability, which contribute theory reference to the studies on harmonic issues of distributed generation accessed to grid.