提升火电机组灵活性改造技术方案研究

Research on the Technology to Improve the Flexibility of Thermal Power Plants

针对目前"三北"地区采暖期电负荷与热负荷需求不平衡日益加剧,火电机组在供暖期参与深度调峰热电解耦需求十分迫切的问题,从技术路线及方案适用范围等方面对提升火电机组灵活性改造的技术方案进行了详细地分析与研究,并针对具体工程确定了热水储热系统和电锅炉系统的工程设计方案。通过分析表明,热水储热系统、电锅炉系统及减温减压系统供热方案均能够在一定程度上提升火电机组的运行灵活性,增加机组调峰深度,不同方案有其各自的适用范围。

In light of the increasing imbalance between the electric and heat loads during the heating period in the Sanbei area, it iscritical that the thermal power units can participate in deep peak load regulation and realize the thermoelectric decoupling during thatperiod of time. The technical schemes for improving the flexibility of the thermal power units are analyzed and studied in detailsfrom different aspects, such as, the technology roadmap, the scope of applications, etc. The hot water thermal energy storage systemand electric boiler system are devised according to the specific project conditions. The analysis indicated that the hot water storagesystem, the electric boiler system, and the temperature and pressure reduced heat supplying system can all enhance the operationalflexibility of the thermal power units and increase the peak load regulation depth of the unit. The different schemes also have theirown scopes of application.