FCB工况下的给水控制系统改进与优化

针对快速切负荷(FCB)工况下巨大负荷波动对给水系统带来冲击,分析未配置全压电泵的给水系统在FCB工况时的控制难点与要点.对汽源切换方式及控制策略进行相应优化,以维持给水系统正常运行.通过相关试验验证由FCB预备性试验时给水控制系统的响应情况.根据切换阀蒸汽流量计算原理对FCB工况下切换阀开启的开度进行计算定位,进一步...

Improvement and Optimization of Water Supply Control System under FCB Condition

Aiming at the impact of the huge load fluctuation on the water supply system under fast cut back(FCB)condition,the difficulties and key points of the control of the water supply system without full voltage pump under FCB condition are analyzed.The steam source switching mode and control strategy are optimized to maintain the normal operation of the water supply system.Verify through relevant tests.According to the response of the water supply control system during FCB's preparatory test,the opening of the switching valve under FCB's working condition was calculated and positioned according to the calculation principle of the switching valve steam flow.The control strategy of the water supply system and the control method of steam source switching were further optimized to realize the smooth switching of steam source under FCB's working condition.This method avoids the large fluctuation of water supply flow clue to the sudden change of steam flow,and finally achieves the expected control effect,and successfully completes the FCB test under 100% load.The optimization of the control strategy of the water supply system provides some reference for the design and optimization of the water supply control system of other units of the same type.