Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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长距离中压线路无功优化算法研究

来源:电工电气发布时间:2017-12-20 10:20 浏览次数:2
长距离中压线路无功优化算法研究
 
马路林
(上海电力学院 自动化工程学院,上海 200090)
 
    摘 要:针对已有算法在解决长距离中压线路无功优化问题中的不足,提出了在保证末端电压质量的情况下,以线路有功功率损耗最小为目标函数的数学模型。通过改进变尺度混沌优化算法中尺度变换系数和“二次搜索”调节系数,在保证当前最优解为中心的情况下,不断缩小优化变量的搜索范围加强局部细化搜索能力,从而提高了对目标函数的求解精度。通过实例分析可知,该算法在处理无功优化问题时其优化程度与线路的长度有一定关系,对于20 km以下的线路其优化效果较为明显,当线路长度约为10 km时结合遗传算法效果更佳。
    关键词:长距离中压线路;变尺度;混沌理论;无功优化
    中图分类号:TM726     文献标识码:A     文章编号:1007-3175(2017)12-0022-04
 
Research on Reactive Power Optimization Algorithm for Long-Distance Medium-Voltage Line
 
MA Lu-lin
(College of Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China)
 
    Abstract: Aiming at the deficiency of the existing algorithms in solving the problem of reactive power optimization of long-distance medium-voltage line, this paper proposed the mathematical model taking the minimum active power loss as the objective function under the conditions to ensure the quality of the terminal voltage. By improving the scale transformation coefficient in the scale chaos optimization algorithm and secondary search regulating coefficient and under the conditions ensuring the existing optimal solution as the centre, the hunting zone of optimization variable was constantly shrunk to reinforce the local refining search capability, so as to improve the solution precision of objective functions. The living example analysis shows that this algorithm optimizing degree is related to the length of line when the reactive power optimization problem is disposed. For the line under 20 km, the optimization is obvious, but for about 10 km line, it’s better to combine with the genetic algorithm.
    Key words: long-distance medium-voltage line; variable scales; chaos theory; reactive power optimization
 
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