供热机组低压缸零出力工况下热经济性分析  

Thermal Economy Analysis of Heating Unit under Zero-output Condition of Low Pressure Cylinder

作　　者：汪可 田亮[1] WANG Ke;TIAN Liang(School of Control and Computer Engineering,North China Electric Power University,Baoding 071003,China)

机构地区：[1]华北电力大学控制与计算机工程学院,河北保定071003

出　　处：《华北电力大学学报（自然科学版）》2023年第4期112-118,126,共8页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家重点研发计划项目(2017YFB0902100);中央高校基本科研业务费专项资金资助项目(2017MS132)。

摘　　要：低压缸零出力运行是当前供热机组灵活性改造的主要方式。依据电网现行深调峰补偿政策,核算机组不同工况下的收益是现场面临的实际问题。研究一种基于热平衡规律的变工况快速算法,能够在保证基本计算准确度的情况下快速计算出机组变工况后运行状态。以某350 MW超临界供热机组为例,分别计算100%TMHCR(最大供热)和40%THA工况下低压缸零出力运行前后的发电功率、供热功率及热耗等参数,进而计算出发电供热收益。结果显示,100%TMHCR工况低压缸零出力运行能够降低发电负荷约8%,提升供热负荷27%,40%THA工况可将发电负荷降低至25%Pe,经济效益显著。The zero-output condition of low pressure cylinder is the main method for modifying the flexibility of the current heating unit.According to the current deep peak shaving compensation policy of the power grid,it is a practical problem to calculate the benefit of the unit under different working conditions.A fast algorithm for part-load conditions based on the heat balance law is studied,which can quickly calculate the operating status of the unit after condition has changed while ensuring the basic calculation accuracy.Taking a 350 MW supercritical heating unit as an example,we calculated parameters including the power generation,heating power,and heat consumption under 100%TMHCR(maximum heating)and 40%THA operating conditions before and after zero-output condition of low pressure cylinder.Based on this,revenue from power generation and heating was calculated.The results show that low-pressure cylinder zero output operation under 100%TMHCR working condition can reduce power generation load by about 8%and increase heating load by about 27%,while 40%THA working condition can reduce power generation load to 25%Pe,showing significant economic benefits.

关 键 词：供热机组 低压缸零出力 经济性分析 变工况计算 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]