An Online Monitoring Method for Stabilizing Inflection Points of Photovoltaic Distribution Systems Containing a High Percentage

The conventional online monitoring method for the stability inflection point of high proportion photovoltaic distribution system mainly uses FFT (Fast Fourier Transformation) to obtain the monitoring threshold, which is vulnerable to the influence of frequency spectrum and frequency band fitting, resulting in abnormal inflection point status monitoring. Based on this, an online monitoring method for the stability inflection point of high proportion photovoltaic distribution system is proposed. That is, the dynamic characteristics of online monitoring of stability inflection point of high proportion photovoltaic distribution system are extracted, and the stability of online monitoring of stability inflection point of high proportion photovoltaic distribution system is judged, thus realizing online monitoring of stability inflection point of distribution system. The experimental results show that the online monitoring method with high proportion of photovoltaic distribution system stability inflection point in this paper can normally complete inflection point status monitoring under different time stamps, which proves that the designed online monitoring method has good monitoring effect, reliability and certain application value, and has made certain contributions to ensuring the operation reliability of distribution system.