Although traditional monitoring theories have tended to improve, with the continuous deepening of practical applications, the shortcomings of various algorithms are constantly exposed. Traditional single monitoring methods are no longer able to adapt to the increasingly complex requirements of harmonic monitoring. Introducing new methods on the basis of existing algorithms to optimize certain calculation processes, or using several methods to cooperate with each other to overcome the shortcomings of a single monitoring algorithm, isPower quality monitoringdeviceThe development trend of the field.

In addition, with the integration of a large number of distributed energy sources and the significant investment in high-voltage direct current transmission, the stable operation of the power grid has put forward higher requirements for real-time monitoring. The use of graphics processors for online real-time analysis and processing is also one of the future trends in harmonic monitoring. GPU is cheaper than FPGA in terms of price, and GPU can handle languages, making implementation easier and time saving.

The power quality issues caused by superharmonics have gradually received attention. Due to the high frequency of superharmonics, high requirements have been put forward for the storage, analysis, and compression sampling technology of sampling data. At the same time, there is no unified measurement and analysis method, resulting in differences in performance evaluation standards. It can be foreseen that the issue of ultra harmonic detection will become a new focus of attention for power quality.

In response to the various hazards caused by harmonics, China had already conducted research on harmonic control in the 1990s and formulated the national standard "Power Quality: Harmonics in Public Power Grids" to limit the allowable values of harmonics in public power grids. Afterwards, harmonic control of the power system and improvement of power quality became a continuous and long-term task. Active power filter is a power electronic device that can dynamically suppress harmonics and improve power quality. The accurate and real-time detection of harmonic current directly affects its dynamic suppression effect.