不同类型供热机组的电热负荷优化分配和调峰性能

Optimizing Distribution of Heat-power Load and Peak Regulation Ability of Heat Supply Units with Different Types

供热机组的抽汽方式和供热形式各不相同,供热机组以热定电的运行方式影响着机组的经济性和电网的负荷调度。由热力试验,给出了不同容量、不同形式供热机组运行中带电、热负荷的限制因素。以几个电厂的供热机组为例,确定了在一定的电、热负荷下,供热机组间的电热负荷分配和优化运行方式。热负荷在一定范围之内,确定优先带热负荷的机组,其它机组纯凝汽方式运行并参与电网调峰,也可利用集中供热系统本身的"热惯性",改变一天中不同时段的热网供热量,从而实现供热机组参与电网调峰。

Heat supply unit can be classified according to steam extraction and heat supply mode. Operational mode of heat supply unit can deeply affect its efficieney and peak regulation of power network, as power load of heat supply unit depends on its heat load. According to thermal test, limiting factors of operational at high heat and power load are obtained for heat supply units with different capacity and types. Optimizing methods for heat-power distribution and unit operational mode are obtained in several thermoelectric plants. Some heat supply units should be taken into operation first to meet heat load demands, Other units operating in condensation mode to meet peak regulation of power network. By using thermal inertia of the heat network, heat supply units can be used for peak regulation by changing heat load during different time in one day.