摘要
针对乐滩水电站运行近15年的轴流转桨式调速器电气部分存在的硬件老化、控制性能下降及安全规范不符等问题,实施系统性升级改造,以提升其可靠性、控制精度与智能化水平。在保持机械主体结构不变的前提下,通过对比分析与逻辑剖析,实施了包括导叶与桨叶传感器“三选二”冗余逻辑改造、增设符合最新安全规范的断电自动关闭功能、优化水头更新与导叶分段关闭控制逻辑、新增功率上限闭锁功能以及改进主配拒动检测逻辑等一系列技术措施。结果表明:改造后系统转速死区小于0.02%,接力器不动时间为0.168 s,甩负荷过程平稳,各项指标均优于国家标准,系统可靠性与调节性能显著提升。本次改造成功实现了老旧调速器系统的智能化升级,其“信号冗余、逻辑软件化、功能集成化”的综合策略,为同类水电站的技术改造提供了有效参考。
Aiming at the problems of hardware aging,degraded control performance and non-compliance with current safety standards in the electrical part of the Kaplan turbine governor,which has been in operation for nearly 15 years in Letan Hydropower Station,a systematic upgrading and transformation was carried out to improve its reliability,control accuracy and intelligent level.On the premise of keeping the main mechanical structure unchanged,a series of technical measures were implemented through comparative analysis and logic analysis,including the 2-out-of-3 redundant logic transformation for guide vane and blade position sensors,the addition of automatic shutdown function upon power failure in accordance with the latest safety standards,the optimization of the water head update and guide vane segmented closing control logic,the newly added power upper limit locking function,and the improvement of the detection logic for main distributor refusal to act.The results show that after the transformation,the speed dead band of the system is less than 0.02%,the servomotor dead time is 0.168 s,the load rejection process is stable,all indicators are superior to the national standards,and the system reliability and regulation performance are significantly improved.The transformation has successfully realized the intelligent upgrading of the old governor system.The comprehensive strategy of"signal redundancy,logic softwareization and functional integration"provides an effective reference for the technical transformation of similar hydropower stations.
作者
贺亚娟
HE Yajuan(Guangxi Guiguan Kaitou Electric Power Co.,Ltd.,Xincheng 546205,China)
出处
《红水河》
2026年第1期131-136,共6页
