发电机功率平衡方式对戴维南等值参数的影响  

Generator power balance impacts on Thevenin equivalent parameters

作　　者：张昱[1,2] 吴政球[1] 张小兵[3] 汤伟中[1] 田中伟[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082 [2]安徽省电力公司马鞍山供电公司,安徽马鞍山243000 [3]湖南省电力公司株洲电业局,湖南株洲412000

出　　处：《电源技术》2016年第3期687-689,692,共4页Chinese Journal of Power Sources

摘　　要：在戴维南等值模型的基础上推导出基于全网发电机参与功率平衡的戴维南等效参数计算公式。先通过牛顿潮流方程求取负荷节点的电压和其实部、虚部分别对节点有功的灵敏度,然后利用节点的分压原理和微分原理求取戴维南等值参数。通过对IEEE 14和IEEE 57节点系统的实例计算,与只有平衡机参与功率平衡方式下的等值参数进行对比,分析了发电机功率平衡方式对戴维南等值参数的影响,并研究了电气距离与戴维南等值参数的关系。该算法过程只需当前时刻的潮流数据,计算方便快捷。分析结果与实际相符,验证了本文计算分析方法的正确性和实用性。The Thevenin equivalent parameter calculation formulas based on all generators was deduced to participate in power balance. Firstly the Newton flow equation was used to calculate the load node voltage and the sensitivity of the voltage to the node active power. Then the Ohm＇s law of the node and differential principle was used to calculate the Thevenin equivalent parameters. Through calculation and analysis of the IEEE 14 and IEEE 57 node system and comparison with the situation of only slack machine participating in power balance, that generator power balance impacts on Thevenin equivalent parameters were analyzed, and the relationship of the electric distance and Thevenin equivalent parameters were studied. The algorithm process just needed the present moment flow data, it＇s convenient and fast. The analysis results shows that the calculation method is correct and practical.

关 键 词：戴维南等效 电压稳定 灵敏度 功率平衡 电气距离 

分 类 号：TM712[电气工程—电力系统及自动化]