热电联产机组抽汽供热期的汽轮机滑压运行优化方法  

Turbines Sliding Pressure Operation Optimization for Cogeneration Unit during in the Period of Steam Extraction for Heating

作　　者：万杰[1] 许天宁 李泽 张志强 刘金福[1] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001 [2]东北电力科学研究院,辽宁沈阳110006 [3]哈尔滨热电有限责任公司,黑龙江哈尔滨150046

出　　处：《节能技术》2015年第1期33-37,42,共6页Energy Conservation Technology

基　　金：国家重点基础研究发展计划资助项目(2012CB215201);哈尔滨市应用技术研究与开发攻关项目(2012DB2CP022)

摘　　要：目前,为了平抑电网中的规模化新能源电源的随机波动,越来越多的大功率火电机组势必要进行深度变负荷运行,滑压运行是降低机组深度调峰发电煤耗的重要手段之一。本文针对热电联产机组的纯凝工况的滑压运行曲线在采暖期不能正常投运问题进行研究,提出了一种以供热抽汽量作为修正参数的热电联产机组抽汽供热期汽轮机滑压运行优化方法,给出了最优主蒸汽压力的获取方法和机组DCS改造的实现策略。此方法不仅能够满足滑压运行时的供热抽汽量需求,而且利用二维函数查询方法近似实现了三维滑压运行曲线。此外,此滑压运行优化方法还具备很好的可扩展性,可以根据实际供热工况对植入的滑压曲线进行调整,因此,具备很好的工程应用及推广价值。最后,通过实际300 MW机组的实际优化改造试验,验证了该滑压运行优化方式的有效性。这对提高热电联产机组在深度变负荷运行时的经济性具有非常重要的意义。In order to smooth the random fluctuation of large - scale new energy power in the grid, there are a growing number of the larger thermal power generating units that need to do deep variable load oper- ation. And turbine＇ s sliding pressure operation is a major measurement for reducing the power consump- tion in deeply changing load condition. This paper studies that sliding pressure operation curve in pure condensate conditions of cogeneration units can＇ t operate well in the heating period. An optimization method of sliding pressure operation as the amount of extraction of correction parameter during the heat extraction period is proposed. The method of getting the optimal main steam pressure and the strategy of DCS transformation are given. Firstly the method meets the heating extraction needs of slidinz pressure operation. Secondly the method achieves 3D sliding pressure operation curve approximately using 2D function inquiry. Thirdly the method has good scalabihty that the sliding pressure operation curve can ad- just to the actual heating conditions. So this method will work well with the value of the application and promotion. At last the effectiveness of the method has been verified by a 300MW unit optimized transfor- mation test. All prove the significance of the method that improves the economy of depth variable load op- eration for cogeneration units.

关 键 词：热电联产 汽轮机 滑压运行 抽汽量 参数修正 经济性 

分 类 号：TK269.2[动力工程及工程热物理—动力机械及工程] TH133[机械工程—机械制造及自动化]