660MW光煤互补系统动态特性仿真研究

Simulation Research on Dynamic Characteristics of 660 MW Solar-Assisted Coal-Fired Power Generation System

光煤互补发电是一种将太阳能集热系统与燃煤发电系统在热力过程中耦合的发电方式,是应对能源结构多元化转型、节能减排的有效方案,降低光热投资的同时减小了燃煤电站煤耗。本文研究了槽式太阳能集热系统与燃煤机组高压加热器并联的互补系统的动态特性,获得了光照阶跃扰动和光煤流量分配比阶跃扰动下互补系统的动态特性。结果表明,互补系统功率随光照强度阶跃增加而增加,随光煤流量分配比阶跃降低先减小后略增大至稳态值,且功率的变化量和响应时间随并联级数增加而增加。

Solar-assisted coal-fired power generation couples solar collector system and coal-fired power generation system in thermal system,which can simultaneously decrease the investment of concentrated solar power and energy consumption of coal-fired power plant.It is an effective solution to the diversified transformation of the energy structure,energy saving and emission reduction.The dynamic characteristics of an integrated system,in which the trough solar collector system is connected in parallel to high-pressure heaters of coal-fired plant,with step disturbance of direct normal irradiance and feedwater flowrate ratio were studied,The results show that the output power increases with the step increase of direct normal irradiance.Moreover,the output power first decreases and then increases to a steady state value with the step decrease of feedwater flowrate ratio.Both The output power variation and response time increase with the number of high-pressure heaters paralleled with trough collector system.