摘要
提升燃煤机组的弹性运行能力,是解决我国乃至世界新能源电力规模化并网难题的有效手段与必由之路。给出并阐明了包括凝结水节流、凝汽器冷却工质节流、供热机组抽汽调节、厂级负荷优化分配以及循环流化床机组大范围调节在内的5种可提升燃煤机组弹性运行能力的策略;建立了凝结水节流与凝汽器冷却工质节流的静态、动态模型,仿真结果表明模型具有较高的精度,可直接用于控制系统与策略设计;设计了联合凝结水节流、凝汽器冷却工质节流与协调控制系统的新型协调控制方案,该方案可大大缩短机组跨出调节死区的响应时间,并显著提升机组的变负荷速率。
To improve the operating flexibility of coal fired units is an effective and necessary way for our country and even the world to solve the problem of large-scale renewable energy integration in grid. Five key strategies including the condensate throttling, cold source throttling, extraction steam adjustment of heating units, optimal load dispatch in power plants, and wide-range load operation of circulating fluidized bed（CFB） units, were given and introduced exquisitely. The static and dynamic models for the condensate throttling and cold source throttling were set up, which had enough accuracy to be directly used for the design of control system and strategy. The combination coordinated control with condensate throttling or cold source throttling was designed, which can greatly reduce the stepping out time from the load change dead zone, and accelerate the load change speed.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2015年第21期5385-5394,共10页
Proceedings of the CSEE
基金
国家重点基础研究发展计划项目(973计划)(2012CB215203)~~
关键词
新能源电力系统
燃煤电厂
弹性
凝结水节流
冷却工质节流
低负荷运行
alternate electrical power system
coal-fired power plants
flexibility
condensate throttling
cold source throttling
low-load operation
