光煤互补发电系统复合扰动工况性能研究

PERFORMANCE STUDY OF COMPOSITE DISTURBANCE WORKING CONDITION OF SOLAR AND COAL-FIRED COMPLEMENTARY POWER GENERATION SYSTEM

以330 MW光煤互补发电系统为例,研究负荷、辐照条件复合扰动情况下太阳能侧集热器效率、燃煤侧高加热转功效率的变化,在此基础上探讨3个高加6种集成方式下太阳能净发电效率与机组负荷及与太阳辐照度之间的关系,确定各负荷和辐照度时段的最佳集成方式。针对夏季中午机组负荷低峰、辐照高峰所产生的太阳能热量的浪费问题,提出光煤互补系统集成方式切换运行的设想,计算表明在该运行方式下,机组每天利用太阳能可多发电9175.7 k Wh。

In solar and coal-fired complementary power generation system,the disturbance of unit load and solar irradiation will lead to the change of multiple parameters of the whole system,and affect the performance of the complementary system.Taking a 330 MW solar and coal-fired complementary power generation system as an example,studying the efficiency change of solar collector and efficiency change of high heat transfer on coal-fired side under the compound disturbance of load and irradiation,on this basis,the relationship between net solar power generation efficiency,unit load and solar irradiance under three high heat and six integration modes is discussed to confirm optimal integration mode of each load and irradiation period of time.Aiming at the problem of waste of solar energy generated by low peak load and high radiation peak at noon in summer,the idea of switching operation of integrated mode of solar and coal-fired complementary system is proposed.The calculation shows that the unit can use solar energy daily to generate 9175.7 k Wh more electricity under this operation mode.