Wedoany.com Report on Mar 10th, Recently, the single-row startup test for the B train of the emergency diesel engine at Unit 3 of China's Hongyanhe Nuclear Power Plant was successfully completed. The speed curve on the host computer was stable and met the standards, marking the successful conclusion of the localization retrofit project for all 13 emergency diesel generator set electronic governors at Hongyanhe Nuclear Power Plant.
This retrofit successfully broke the foreign technological monopoly, achieving full-chain independent control of core control components. Key technologies such as host computer regulation and control have achieved independent breakthroughs, solidifying the emergency safeguard line for the safe and stable operation of nuclear power.
Emergency diesel generator sets are the "last line of defense" for the safe operation of nuclear power. Their electronic governors, as core control components, have long faced issues such as import dependency, long supply cycles, high operation and maintenance costs, and limited technical service, becoming a key bottleneck restricting equipment safety and maintenance. To solve this problem, the retrofit team at Hongyanhe Company utilized the major overhaul windows of the twelve units, coordinating deployment, implementing step-by-step, verifying unit by unit, and comprehensively advancing the localization retrofit work.
During the critical phase of the retrofit, the technical team directly confronted core technical challenges, successfully overcoming multiple technical barriers including speed control algorithms, precise signal matching, coordinated operation of multiple units, and safety logic protection. They independently developed electronic governors and supporting systems adapted to the harsh working conditions of nuclear power, achieving full-process independence in component design, manufacturing, installation, and commissioning. The team efficiently completed the disconnection and reconnection of nearly 2000 control cables, logic verification, and functional debugging using the overhaul windows, achieving full coverage of localization retrofits for all plant units to a high standard and completely eliminating reliance on foreign technology.
This localization substitution achieved dual improvements in safety and efficiency. On one hand, the domestic electronic governors are equipped with an intelligent control system on the host computer, featuring real-time speed monitoring, remote parameter adjustment, intelligent fault diagnosis, and full-process data traceability, significantly enhancing equipment control and maintenance efficiency. On the other hand, it fundamentally reduces costs for spare parts inventory and maintenance services. Technical response, spare parts supply, and equipment upgrades are now fully independent, completely eliminating supply chain risks and truly achieving the dual goals of "risk prevention and cost reduction."
