摘要
由于风电出力的间歇性和反调峰性,如果以弃风量最小为目标进行电力调度,则可能导致火电机组出力严重偏离经济运行区,致使系统煤耗量增加。结合国内可再生能源发电的相关政策和节能发电调度的基本目标及准则,针对基于弃风量最小和能耗最小的2种发电调度模式,分别构建了相应的优化调度模型;研究并提出了含风电系统发电调度的经济性评价指标,包括风电利用率、可用风电单位价值、系统能耗和调峰容量等;采用10机测试系统,在不同风电接入量的条件下,对2种调度模式的利弊和适用性进行了定量分析,得出结论为能耗最小调度模式下电力系统运行经济性比弃风量最小调度模式好。
Due to the intermittent and anti-peaking nature of wind power,a generation scheduling aimed at minimizing wind power curtailment may cause thermal units significantly deviating from their optimal economic operating area,which will increase the coal consumption in the power systems.By combining the policies about renewable resources generation and the basic aim or criterion of energy saving generation dispatch,an optimal dispatching model is built corresponding to two wind power dispatching modes,i.e.,minimizing the wind power shedding or minimizing the coal consumption,respectively.Economic evaluation indices of wind power dispatching modes are proposed,including the rate of wind power utilization,the value of per megawatt available wind power,energy consumption and peaking capacity.Finally,the two dispatching modes are analyzed and compared under different levels of wind power in the power grid in a ten-unit test system.The results indicate that the wind power dispatching mode based on minimization of energy consumption is more economical than that of minimizing wind power curtailment.
出处
《电力系统自动化》
EI
CSCD
北大核心
2011年第22期105-110,共6页
Automation of Electric Power Systems
关键词
风电系统
调度模式
优化模型
节能降耗
wind power system
dispatching mode
optimization model
energy saving and consumption reduction
