复区间潮流保守性问题的解决方案

Solution to Conservative Property of Complex Interval Power Flow

区间运算的保守性问题是困扰区间潮流的主要问题之一。文中将复平面上区间数的3种不同表达方式,即方形域表达、圆盘域表达和扇形域表达引入区间潮流,来研究它们对区间潮流结果保守性的影响。复区间潮流采用的基本算法是配电网前推回推复区间潮流算法。采用33母线系统为算例,对潮流结果的保守性进行了研究,得出结论认为,根据电力系统中负荷的不同基本组成,来选择适当的复区间表示方式,可以降低区间潮流计算结果的保守性。

Conservative property in the interval computations has been one of the main problems in power flow calculation based on interval algorithm. Three kinds of representations for complex interval including complex box, complex disk and complex fan are introduced into power flow calculation and their influence on conservative property of the results of interval power flow is studied. A forward and backward interval algorithm for distribution power flow calculation is adopted. Taking a 33 bus system as the test system, conservative property of the results of interval power flow is studied. Conclusion obtained in the paper is that conservative property in the interval power flow calculation can be reduced by selecting suitable representations for complex interval based on the difference of elementary components which makes up loads in power system.