针对甚低频发射天线顶线绝缘子串电压分布不均匀极易产生电晕的问题,采用矩量法(method of moments,MOM)研究了不同均压环管径、半径、抬高距以及绝缘子串配置位置对瓷支柱绝缘子串电压分布的影响,提出了一种应用矩量法和蝴蝶交配优化算...针对甚低频发射天线顶线绝缘子串电压分布不均匀极易产生电晕的问题,采用矩量法(method of moments,MOM)研究了不同均压环管径、半径、抬高距以及绝缘子串配置位置对瓷支柱绝缘子串电压分布的影响,提出了一种应用矩量法和蝴蝶交配优化算法(butterfly mating optimization,BMO)协同优化顶线绝缘子串均压环的新方法。该方法首先建立顶线绝缘子串MOM天线优化模型;然后,提取仿真得到的分压和天线效率并计算目标函数;利用BMO迭代得到顶线绝缘子相对位置和均压环结构参数。仿真结果表明:顶线绝缘子高压侧的均压环半径和抬高距对绝缘子电压分布影响较大,低压侧配置均压环可以使顶线绝缘子串末端绝缘子的分压降低44.5%;与优化前实测值相比,优化后顶线绝缘子串的电压百分比均方差降低了2.17%,均压环最大表面电场小于起晕电场,天线辐射效率提升1.5%。展开更多
In this paper, we investigate the Gerber-Shiu discounted penalty function for the surplus process described by a piecewise deterministic Markov process （PDMP）. We derive an integral equation for the Gerber-Shiu disc...In this paper, we investigate the Gerber-Shiu discounted penalty function for the surplus process described by a piecewise deterministic Markov process （PDMP）. We derive an integral equation for the Gerber-Shiu discounted penalty function, and obtain the exact solution when the initial surplus is zero. Dickson formulae are also generalized to the present surplus process.展开更多
文摘针对甚低频发射天线顶线绝缘子串电压分布不均匀极易产生电晕的问题,采用矩量法(method of moments,MOM)研究了不同均压环管径、半径、抬高距以及绝缘子串配置位置对瓷支柱绝缘子串电压分布的影响,提出了一种应用矩量法和蝴蝶交配优化算法(butterfly mating optimization,BMO)协同优化顶线绝缘子串均压环的新方法。该方法首先建立顶线绝缘子串MOM天线优化模型;然后,提取仿真得到的分压和天线效率并计算目标函数;利用BMO迭代得到顶线绝缘子相对位置和均压环结构参数。仿真结果表明:顶线绝缘子高压侧的均压环半径和抬高距对绝缘子电压分布影响较大,低压侧配置均压环可以使顶线绝缘子串末端绝缘子的分压降低44.5%;与优化前实测值相比,优化后顶线绝缘子串的电压百分比均方差降低了2.17%,均压环最大表面电场小于起晕电场,天线辐射效率提升1.5%。
基金Supported by National Natural Science Foundation of China (Grant Nos. 10926161, 10901086, 10871102)National Basic Research Program of China (973 Program) 2007CB814905the Research Fund for the Doctorial Program of Higher Education
文摘In this paper, we investigate the Gerber-Shiu discounted penalty function for the surplus process described by a piecewise deterministic Markov process （PDMP）. We derive an integral equation for the Gerber-Shiu discounted penalty function, and obtain the exact solution when the initial surplus is zero. Dickson formulae are also generalized to the present surplus process.
