Research on Grid High Voltage Harmonic Detection Based on Ubiquitous Power Wireless Network

Abstract

The intelligent optimized operation of the power grid depends on the ubiquitous perception of the system and complete and correct data support, which is also the most basic requirement that the ubiquitous power Internet of Things perception layer must meet. In the application of ubiquitous power Internet of Things, obtaining complete and correct measurement data is the basis for managing power quality problems. However, in the entire link of the actual grid collection and transmission, data defects will inevitably occur. Based on the background of the ubiquitous power Internet of Things wireless network, the paper adopts the idea of modular programming and divides it into three modules: frequency measurement sampling, waveform display and harmonic display according to the performance indicators of the harmonic analyser. It can measure the frequency of the input AC voltage, perform AC synchronous sampling of the input voltage according to the measured frequency, and display the waveform of the input voltage; and then calculate the harmonics of each order through the FFT algorithm. The simulation found that the proposed control strategy significantly improved the harmonic current content than the traditional d-q positive and negative sequence decoupling control.