国产600MW超临界机组宽度调峰试验研究

随着电网负荷及峰谷差的不断增大,在中国600 MW超临界火电机组已经成为电网主力机组并需频繁地承担调峰任务.通常火电机组调峰是指尽可能降低锅炉最低稳燃负荷,即传统的“深度调峰”.提出了“宽度调峰”的概念,并在国产600 MW超临界机组上开展了“宽度调峰”的试验研究,通过设备改造、燃烧调整、配煤掺烧、汽轮机滑压曲线优化和协调控制完善等措施,提高机组调峰性能.实现在传统“深度调峰”方面向下突破锅炉最低稳燃负荷设计值,向上挖掘机组带负荷潜力,扩大机组调峰幅度,达到“宽度调峰”目的.宽度调峰有利于电网安全调度与稳定运行,同时增加发电企业参与电网调峰运行的发电量和经济效益,实现了“调峰运行、网厂双赢”.

Testing on Domestically-Made 600-MW Supercritical Units in Broad Peak-Regulation of Power Grids

At present,with the increase of grid loads and peak-to-peak difference 600-MW units are becoming the most popular units in the country and operate on regulation more frequently.The typical regulation mode of thermal power units is to reduce the boiler oil-free minimum load under stable combustion,which is referred to as ＂deep peak regulation＂.In this paper the concept of ＂broad peak regulation＂ is proposed and related tests are carried out on domestic 600-MW supercritical units.The regulation performance of the units is improved through equipment innovation,combustion adjustment,mixed coal combustion,steam turbine slide pressure operation curve optimization and coordinated control improvement.The target of＂broad peak regulation＂,to expand the regulation range of the units,can be realized by decreasing the minimum boiler load under stable combustion and increasing the potential loading capability of the units.It may improve the security dispatch and operation stability of power grids.The power generation quantity and economical benefit of the regulation units are increased.The win-win target is achieved between grids and plants.