摘要
依据负荷曲线的变化趋势,提出了一种能够细致考虑负荷变化率的日发电计划安排方法。该方法运用融合思想对负荷曲线进行时间过程的划分,并提取相应时段的特征负荷。时间过程划分后,在负荷变化平稳时,少量时间过程较长子时段的负荷水平更接近系统的实际情况;而在负荷急剧变化时,数量较多的短子时段细致刻画了负荷曲线攀峰降谷过程,且提供了充足的缓冲时间渡越陡峭段落。基于瓶颈序列分析,运用段落全局优化方法进行求解。与传统方法相比,在不增加计算量的前提下,获得了更佳的优化效果,不仅提高了经济效益,而且发电机在各时段的有功输出更加平稳,有利于与自发电控制系统的协调,同时减轻了调度员的操作负担。IEEE30节点算例证实了该方法的有效性。
A daily generation scheduling method which can carefully consider the load variation rate is presented. According to the varying tendency of the load curve, a day is subdivided into certain subintervals using the combination method with the characteristic load of every subinterval extracted. As a result, the loads of a few longer subintervals that represent the periods of gentle load variations are closer to the actual situation. By contrast, during abrupt load variation, more subintervals with shorter time duration depict in detail the load behavior in the pick-up and drop-down process and provide sufficient buffer time to get over the critical peak and valley loads. Based on the bottleneck analysis, the full-stage optimal algorithm is used to make the daily generation scheduling. Compared with the traditional one, the method proposed has several advantages, e.g. , better optimization effect without increasing any computational workload, increased economic benefits, smoother active power output of generation units, easier coordination with the automatic generation control （AGC）, and reduced operation burden for dispatchers. An example of IEEE 30-bus system shows the effectiveness of the method.
出处
《电力系统自动化》
EI
CSCD
北大核心
2008年第18期30-34,共5页
Automation of Electric Power Systems
基金
高等学校博士学科点专项科研基金资助项目(20060213042)
哈尔滨工业大学科研创新基金资助项目(HITNSRIF200854)~~
关键词
日发电计划
融合
段落全局算法
负荷变化率
daily generation scheduling
combination
full-stage optimal algorithm
load variation rate
