两种水煤比控制策略下调峰机组的能耗特性  

Energy Consumption Characteristics of Power Units with Two Water-Coal Ratio Control Strategies in Transient Peak Load Regulation

作　　者：王朝阳[1] 常仁杰[2] 朱庆玉[2] 刘明[1] 严俊杰[1] WANG Chaoyang;CHANG Renjie;ZHU Qingyu;LIU Ming;YAN Junjie(State Key Laboratory of Multiphase Flow in Power Engineering,Xi＇an Jiaotong University,Xi＇an 710049,China;Huaneng Dandong Power Plant,Dandong,Liaoning 118300,China)

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,西安710049 [2]华能丹东电厂,辽宁丹东118300

出　　处：《西安交通大学学报》2018年第7期115-122,共8页Journal of Xi'an Jiaotong University

基　　金：国家重点基础研究发展计划资助项目(2015CB251504);国家自然科学基金资助项目(51436006)

摘　　要：为研究热工控制策略对燃煤机组瞬态变负荷过程能耗特性的影响,以660 MW超临界机组为研究对象,建立了机组全系统动态模型,研究了煤跟水和水跟煤两种控制策略下,不同变负荷瞬态过程中燃煤机组主要参数及其能耗特性的变化规律。结果表明:变负荷瞬态过程中,采用煤跟水控制方式较水跟煤控制更有利于主汽压力的稳定,主汽压力的累计偏差较小,但主汽温度的控制效果不如水跟煤控制方式,主汽温度的累计偏差更大。煤跟水控制方式使机组在变负荷过程中更能充分利用自身的蓄热能力,相比水跟煤控制方式,机组具有更高的能量转换效率,平均发电标准煤耗率增量更小,研究范围内最大相差0.69g·kW-1·h-1。To research the influence of thermal control strategy on the energy consumption characteristics of coal-fired power plants in peak load regulation process,a model of 660 MW coal-fired supercritical power unit coupled with its control system was established.The key parameters of the unit and its characteristics of energy consumption in load regulation process were calculated and analyzed under water follow coal（WFC）and coal follow water（CFW）control strategies.The results showed that CFW control strategy has advantages over WFC in live steam pressure control,the cumulative deviation of live steam pressure with CFW is less than that with WFC;but CFW does not show superiority in live temperature control,and its cumulative deviation of live steam temperature is larger than that with WFC.The supercritical unit with CFW control strategy can make full use of its energy storage in load regulation process.A supercritical power unit with CFW control strategy has a higher energy conversion efficiency than WFC control strategy in transient loading variation process,and its average standard coal consumption variation rate is smaller with a maximum deviation of 0.69 g· kW-1·h^-1 in our research.

关 键 词：超临界机组 变负荷 控制策略 能耗 

分 类 号：TK212[动力工程及工程热物理—动力机械及工程]