With the accelerated construction of new power systems, power quality has become a core factor affecting the stability of industrial production, the efficiency of new energy consumption, and the safe operation of the power grid. Issues such as voltage fluctuations, harmonic distortion, and frequency deviations can not only lead to the failure of precision equipment and increased energy consumption, but also restrict the grid connection efficiency of high-proportion renewable energy sources. To address this need, power quality management products provide systematic solutions for different fields through technology integration and scenario adaptation.
Voltage sags and interruptions are among the most prominent power quality problems in industrial scenarios. Related management products are represented by Dynamic Voltage Restorers (DVRs), whose core lies in millisecond-level response energy storage and inverter technology. They can quickly compensate for voltage surges, drops, or short-term interruptions, ensuring the stable operation of loads with extremely high power supply continuity requirements, such as semiconductor manufacturing and data centers. These products, by monitoring grid parameters in real time and predicting disturbance trends, combined with high-frequency switching control algorithms, can increase sag suppression capabilities to over 90% of the rated value, significantly reducing production line downtime losses caused by voltage anomalies.
Active power filters (APFs) have become the mainstream solution for harmonic pollution caused by nonlinear loads. Unlike traditional passive filters with their fixed compensation, APFs detect harmonic components in the load current in real time and generate reverse compensation currents to offset distortion, achieving precise control of harmonics from the 2nd to the 50th orders across the entire frequency band. Their modular design supports parallel expansion of multiple units, flexibly adapting to scenarios with complex harmonic content, such as rail transit, metallurgy, and chemical industries. This helps users meet the stringent requirements of national power quality standards (such as GB/T 12325 and GB/T 24337), while reducing problems such as transformer overheating and increased cable losses caused by harmonics.
Furthermore, static var generators (SVGs) focus on the dynamic balance of reactive power in the system, making them particularly suitable for scenarios with impulsive loads such as new energy power plants and electric arc furnaces. Its medium-voltage direct-connection technology, based on fully controlled power electronic devices, enables continuous adjustment of reactive power from inductive to capacitive, reducing response time to less than 10ms. This effectively improves the power factor, reduces line losses, provides voltage support to the grid, and enhances the grid-friendliness of renewable energy integration.
Currently, power quality products are evolving towards intelligence and integration: the embedding of edge computing modules enables devices to have self-diagnostic and strategy optimization capabilities; multi-technology integration solutions (such as DVR+APF integrated devices) reduce deployment costs in complex scenarios. With the advancement of "dual-carbon" goals, these products are not only tools for industrial users to reduce costs and increase efficiency, but will also become "invisible guardians" of the stable operation of new power systems, injecting reliable momentum into energy transformation.
