330 MW机组配置电锅炉调峰容量确定分析

Determination andanalysis of peak-regulating capacity of electric boiler on 330 MW unit

为了满足热电机组在供热期运行时要通过热电解耦,力争实现单日6 h最小发电出力达到40%额定负荷的调峰能力要求,提出供热机组配置电锅炉进行调峰的方案。以某330 MW机组为例,结合机组供热特性试验数据和设计供热工况图,绘制了机组的实际运行供热特性曲线,并以其中的最大抽汽工况曲线为依据,分别确定了不同供热面积和不同调峰目标下所需配置的电锅炉容量。结果表明:当单台机组对应供热面积分别为600万平方米、800万平方米和1000万平方米时,分别配置10.5 MW、40.6 MW、70 MW的电锅炉即可满足40%额定负荷调峰的要求;调峰目标每提高10%,所需配置电锅炉平均容量增大约21.5 MW,供热面积每增加100万平方米,所需配置的电锅炉容量增大约14 MW。该结果可为同类型机组进行电锅炉改造提供参考。

In order to meet the peak-regulating capacity requirement of 6h daily minimum power generation output reaching 40%of rated load through thermoelectric decoupling during heating period,a peak-regulating scheme of electric boiler for heating unit is proposed.Taking a 330 MW unit as an example,combined with the heating characteristic test data of the unit and the design heating condition diagram,the actual operation heating characteristic curve of the unit is drawn.Based on the maximum extraction condition curve,the required electric boiler capacity under different heating area and different peak regulating targets is determined.The results show that when the corresponding heating area of a single unit is 6 million square meters,8 million square meters and 10 million square meters,10.5 MW,40.6 MW and 70 MW electric boilers can be configured respectively to meet the requirement of 40%rated load peak regulation.The average capacity of electric boilers required to be configured will increase by about 21.5 MW when the peak regulating target is increased by 10%,and the capacity of electric boilers required to be configured will increase by about 14 MW when the heating area is increased by 1 million square meters,which provides a reference for electric boiler transformation of the same type of units.