Research on Simulation Alternative Methods for Areva Valve Based Electronic Equipment

The converter station of Areva technology has been in operation for many years, and its valve based electronic equipment is close to the design life of the equipment, facing problems such as lack of spare parts and lack of after-sales service. However, the internal characteristics of the converter valve of Areva Technology roadmap are always a "black box" problem externally. If it is in this situation for a long time, it may affect the normal operation and maintenance of the equipment, so it is urgent to simulate and replace it. Firstly, the working principle of ultra-high voltage converter valves and the functions of valve based electronic devices are analyzed. Then, a dynamic analysis adaptive simulation method for valve based electronic device simulation is proposed, and the unique serial communication protocol between AREVA valve based electronic devices and gate units is analyzed. Through in-depth research and experimental verification, the AREVA unique serial communication protocol is fully mastered, Finally, a layered modular hardware architecture design scheme for valve based electronic equipment is proposed, and prototype development is completed. The replacement prototype adopts hardware redundancy design, supporting seamless switching of redundant systems and online replacement of faulty boards. The experimental results indicate that the alternative prototype can effectively simulate and replace the triggering and monitoring functions of AREVA thyristor level circuits.