Tap Changer Position State Perception and Regulation Technology for No-Excitation Switch

With the increasing intelligence of power systems, the demand for condition monitoring and remote control of distribution network equipment is becoming more urgent. Traditional manual tap changing of no-excitation tap changers has problems such as long power outage time, low precision, and high maintenance costs, which affect the quality of electric power. This paper focuses on the research of tap position perception and regulation technology for no-excitation tap changers. It analyzes contact detection technology and discusses the design and optimization strategies of electric operating mechanisms. Without changing the existing structure of distribution transformers, this paper proposes a tap position perception device for on-load tap changers of distribution transformers and an electric tap changing device suitable for no-excitation tap changers. The feasibility and effectiveness of the relevant technologies are verified through typical application cases. This enables power companies to monitor and regulate the output voltage tap positions of no-excitation tap changers in distribution transformers in real time.