Optimized Configuration Scheme of Harmonic Measuring Device Considering Practical Situations of Grid Nodes and Monitoring Device

A large number of distributed new energy sources are connected to the power grid, which makes the harmonic problems more complicated, deteriorates the power quality of the power grid, and brings huge economic losses to the power grid and related users. The optimized configuration of the harmonic measuring device can monitor the harmonic information in the power grid, and then estimate the harmonic state in the power grid, which is helpful for the positioning of harmonic sources and harmonic control. Considering that there are few measuring devices available for installation in the power grid, this paper first gives the configuration basis of measuring devices, and then proposes different measurement device optimization configuration schemes for four different actual situations, which reduces the number of measuring devices and ensures the maximum observability of important users and distribution network harmonics. Finally, the correctness of the proposed method is verified by case analysis.