采用串联补偿器优化电网潮流的进化算法

P. Fernandez-Comesana, J. Doval‐Gandoy, E. Díaz-Dorado, D. Alvira-Baeza
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引用次数: 7

摘要

实际的线路有很多运行问题,比如振荡,线路中重要的无功流,其他类型的问题是网络的平面化(发电机的功率,线路中的无功流……)或网络线路中潮流的分配不良,例如一条线路过载而其他线路低于其标称功率,这种情况发生在网络中,例如当一条线路下降时。许多技术已经被用来解决这第二类问题,实际上,基于进化和自然选择的技术(如遗传算法或进化算法)正在与电子设备结合使用。FACTS是解决这些问题的一个很好的电子设备,因为变换器可以一直保持旁路状态,直到某条线路掉线,在这个时刻可以用变换器来解决问题。使用SSSC变换器可以改变线路阻抗,因为它们可以注入与线路电流正交的电压,因此变换器的效果是一个容抗或电感抗与线路阻抗串联。本文提出了一种进化算法,用于解决将SSSC变流器置于电网中以优化电网所有线路的潮流,使总装机功率最小的问题。要放置的转换器的数量和它们的功率也将由算法选择。
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Evolutive algorithm to optimize the power flow in a network using series compensators
The actual lines have many operation problems like oscillations, a important reactive power flow in the lines… other kind of problems are the planification of the network (power of the generators, reactive power flow in the lines…) or the bad distribution of the power flow in the lines of the network, for example one line overloaded and the other lines below their nominal power, this case happens, for example, in a network when a line falls. Many techniques have been used to solve this second type of problems, actually techniques based in the evolution and natural selection (like genetic algorithms or evolutionary algorithms) are being used combined with electronic equipment. The FACTS are a good electronic equipment to be used in these problems, because the converter can stay in bypass until a line falls, in this moment the converter can be used to solve the problem. The line impedance can be changed using SSSC converters, because they can inject a voltage in quadrature with the line current, so the effect of the converter is a capacitive or a inductive reactance in series with the line impedance. This paper presents an evolutive algorithm that solves the problem of placing SSSC converters in a network to optimize the power flow across all the lines of those network, minimizing the total installed power. The number of converters to be placed and their power will be chosen by the algorithm too.
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