摘要
为了提高分布式热电冷联供系统的电力调峰能力,适应主动配电网的主动控制和主动管理,提出了基于主动配电网的高效分布式热电冷联供系统。该系统具有以下特点：能以＂热电协同＂模式运行,实现热电解耦;为电网调峰;减少弃风、弃水、弃光等。同时,该系统还可以实现原动机发电余热的深度回收,大幅提高系统的能源利用效率。详细介绍了系统的工作原理和运行控制模式,并对系统进行了节能性和经济性评价。通过具体案例分别对常规热电冷联供系统和本系统进行逐时的模拟计算分析,得出本系统的供热节能率为13.4%,全年节能率为6.6%;按照北京市现行能源价格计算,本系统的经济性与常规热电冷联供系统差别不大,上网电价对系统经济性的影响相对较大。本系统的热电比一般为常规热电冷联供系统的1.5~2倍,最大可达到2以上,对能源的利用更充分,同时可为电网减轻并网压力。
In order to improve the peak-load regulation capability of distributed combined cooling heating and power（CCHP） system and adapt to the active control and management of active distribution network, a high efficient distributed CCHP system for active dis- tribution network is presented. The system can run at a coordinated mode, in which the heat and power are decoupled and concerted, and the system can adjust the peak of power grid and reduce abandoned wind, water and light. Meanwhile, the system can deeply re- cycle the waste heat of the flue gas of the engine and greatly increase the energy efficiency. The flow chart and the operation mode of the system are described in detail, then the energy efficiency and the economy are evaluated. Simulation calculation is done in a specif- ic case to analyze the operation characteristics of the system according to the heating, cooling and power load. Results show that the energy-conservation ratio of heating of the system is 13.4% and the annual energy-saving ratio is 6. 6%. According to the current en- ergy prices, the economy of the system is not much different from the conventional CCHP system. The influence of tariff on the econ- omy of the system is relatively large. The thermoelectric ratio is normaly 1.5 to 2 times of the conventional CCHP system, at most 2 times bigger, which can alleviate the intergration pressure of power grid.
出处
《南方电网技术》
北大核心
2016年第12期68-74,共7页
Southern Power System Technology
基金
国家高技术研究发展计划(863计划)项目(2014AA051902)~~
关键词
主动配电网
热电冷联供
节能性
经济性
热电比
active distribution network
combined cooling heating and power
energy conservation
economy
thermoelectric ratio
