共查询到20条相似文献,搜索用时 112 毫秒
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介绍了遗传算法的基本原理,提出电机设计中约束条件的一种简化处理方法,并结合标准遗传算法对一台扁平型双边直线感应电动机进行了优化设计,优化设计后,电机的力能指标有显著提高. 相似文献
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在于遗传算法的大中型异步电机优化设计 总被引:2,自引:0,他引:2
本在遗传算法基本原理的基础上,结合异步电机优化设计的特点,建立了电机优化算法模型,并对传统遗传算法进行了改进。通过对大中型异步电机进行优化实例研究。表明遗传城电机优化设计领域是一种行之有效的全局优化方法。 相似文献
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电机优化设计是电气工程领域的热点问题之一.本文针对传统电机优化设计存在的主要问题,详细讨论了以遗传、免疫算法为代表的几种最新全局优化方法在电机优化领域的应用情况,阐述了它们不同于传统优化算法的特点,并提出了今后电机优化设计的发展方向. 相似文献
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This paper presents a new algorithm based on integrating genetic algorithms, tabu search and simulated annealing methods to solve the unit commitment problem. The core of the proposed algorithm is based on genetic algorithms. Tabu search is used to generate new population members in the reproduction phase of the genetic algorithm. A simulated annealing method is used to accelerate the convergence of the genetic algorithm by applying the simulated annealing test for all the population members. A new implementation of the genetic algorithm is introduced. The genetic algorithm solution is coded as a mix between binary and decimal representation. The fitness function is constructed from the total operating cost of the generating units without penalty terms. In the tabu search part of the proposed algorithm, a simple short-term memory procedure is used to counter the danger of entrapment at a local optimum, and the premature convergence of the genetic algorithm. A simple cooling schedule has been implemented to apply the simulated annealing test in the algorithm. Numerical results showed the superiority of the solutions obtained compared to genetic algorithms, tabu search and simulated annealing methods, and to two exact algorithms 相似文献
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《Electric Power Systems Research》1999,49(2):71-78
This paper presents a new algorithm based on integrating the use of genetic algorithms and tabu search methods to solve the unit commitment problem. The proposed algorithm, which is mainly based on genetic algorithms incorporates tabu search method to generate new population members in the reproduction phase of the genetic algorithm. In the proposed algorithm, genetic algorithm solution is coded as a mix between binary and decimal representation. A fitness function is constructed from the total operating cost of the generating units without penalty terms. In the tabu search part of the algorithm, a simple short term memory procedure is used to counter the danger of entrapment at a local optimum by preventing cycling of solutions, and the premature convergence of the genetic algorithm. A significant improvement of the proposed algorithm results, over those obtained by either genetic algorithm or tabu search, has been achieved. Numerical examples also showed the superiority of the proposed algorithm compared with two classical methods in the literature. 相似文献
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Abolhassan Ghasemi 《电力部件与系统》2014,42(12):1239-1248
One of the main challenges in permanent magnet electrical machine design is cogging torque reduction. In this article, the magnet segmentation method is used for cogging torque reduction. For this end, each surface permanent magnet is divided into eight parts, and a symmetrical structure with equal angular widths and considering the angular gaps between them is used for minimizing a number of optimization parameters. In this article, three optimization algorithms—response surface methodology, genetic algorithm, and particle swarm optimization—are used to determine the optimal values of optimization parameters. Finally, the result is obtained that the optimum values of response surface methodology are more efficient than of those of the genetic algorithm and particle swarm optimization in cogging torque reduction, because the objective function of the response surface methodology is cogging torque that is calculated using the finite-element method, whereas the objective function in the genetic algorithm and particle swarm optimization is based on the analytical methods. However, the main objection of the magnet segmentation method is the simultaneous reduction of average torque with cogging torque. 相似文献
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基于遗传算法的超导磁储能装置H2/H∞鲁棒控制器设计 总被引:7,自引:0,他引:7
提出了应用GA(遗传算法)设计H2/H∞鲁棒控制器的一般方法,使得在满足闭环系统的H∞范数小于指定的工程要求的条件下误差信号的H2范数最小,该问题可归结为一个带约束条件的极小值优化问题,并通过一种改进的遗传算法加以解决,该设计方法能对具有任意控制器结构的控制系统进行参数优化,与传统的鲁棒控制器设计方法相比,所提出的方法不仅可以提高控制器的鲁棒性,还具有易于进行参数优化的优点,将所提出的方法应用于超导磁储能装置(SMES)PI型鲁棒控制器的设计,时域仿真结果表明所设计的控制器具有很好的鲁棒性,在不同的运用工况下均能有效阻尼电力系统的振荡,此外,控制器还具有结构简单,易于工程实现的优点。 相似文献
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Genetic algorithms (GAs) are widely used for optimal allocation of capacitors in distribution systems. When dealing with large-scale systems, such as in case of unbalanced multi-converter distribution systems, these algorithms can require significant computational efforts, which reduce their effectiveness. In order to reduce processing time for GAs and simultaneously maintain adequate levels of accuracy, methods based on the reduction of the search space of GAs or based on micro-genetic algorithms have been proposed. These methods generally guarantee good solutions with acceptable levels of computational effort. In this paper, some fast, GA-based methods are compared and applied for solving the problem of optimal sizing and siting of capacitors in unbalanced multi-converter distribution systems. The algorithms have been implemented and tested on the unbalanced IEEE 34-bus test distribution system, and their performances have been compared with the performance of the simple genetic algorithm technique. 相似文献
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基于遗传算法的改进谐波平衡算法 总被引:5,自引:1,他引:4
针对标准谐波平衡算法存在迭代收敛慢,计算量大的问题,采用遗传算法所具有的隐含并行性、全局解空间搜索特性,以及其优化过程不受限制性条件约束的优点,提出了引入遗传算法加速其收敛过程的改进谐波平衡算法。通过将遗传算法的随机自适应优化过程与标准谐波平衡算法的迭代运算过程相结合,简化了标准谐波平衡算法迭代计算的过程,提高标准谐波平衡算法的收敛速度和计算精度。并采用该算法对Duffing-VanDerPol方程的进行了求解,得到了该方程的近似解析解,通过与Runge-Kutta法所得数值解相比较,两者的一致性较好,表明了该算法的有效性。 相似文献
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应用贝叶斯网络模型的电力系统故障诊断 总被引:2,自引:0,他引:2
遗传算法应用于电力系统故障诊断的一个难题是如何建立合理的数学模型。针对这一难题,建立了基于元件的贝叶斯网络故障诊断模型,并通过一定的推理规则,根据贝叶斯网络形成遗传算法的目标函数,用遗传算法进行优化求解。在应用遗传算法时,对传统算法进行了一系列的改进,改善了算法的收敛性能,提出了在迭代过程中推测不完备信息的方法,增强了算法对于大量不完备保护信息的处理能力。大量算例表明了所述方法的合理性和实用性。 相似文献
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激光粒度测试的非独立反演算法的研究 总被引:4,自引:0,他引:4
韩秀英 《国外电子测量技术》2010,29(7):27-28
在光散射法测量微粒体系粒度分布中,关键是反演算法的选择及其正确使用。基于米氏散射理论,研究了非独立反演算法,把遗传寻优算法引入到非独立算法中。实验验证表明,引入遗传寻优到非独立反演算法扩大了非独立反演算法的寻优范围及寻优速度,对标准粒径的反演结果误差在1%以内。 相似文献