Study on Superposition Sound Field of Filter Devices Used in Converter Stations

High- Voltage Direct-Current (HVDC) transmission systems provide a critical means of delivering clean energy to economically developed areas. However, noise pollution from converter stations, particularly from filter devices such as capacitors and reactors, has become a significant concern. This paper investigates the acoustic noise generated by these filter devices, focusing on the superposition of sound fields produced by capacitors and reactors. The theoretical analysis of sound pressure superposition reveals the influence of phase differences between the sound waves emitted by each device, and experimental measurements validate these findings. By analyzing sound field distributions under various excitation conditions, this paper demonstrates that interference effects between reactor and capacitor noise are prominent, significantly affecting the total noise level. The results highlight the importance of understanding the interactions between these sound sources for effective noise reduction in HVDC converter stations. This paper provides valuable insights for optimizing acoustic management strategies in power converter stations, contributing to both noise mitigation and improved environmental acoustics.