In the design of high voltage transmission lines inevitably needed to change the arrangement of wires, and the distance between the wires directly affected by changing the arrangement of the wires. The distance betwee...In the design of high voltage transmission lines inevitably needed to change the arrangement of wires, and the distance between the wires directly affected by changing the arrangement of the wires. The distance between the wires is difficult to judge by experiences. Therefore, it is urgently to develop a way to accurately calculating the minimum distance between the wires when changing the arrangement between the two wires, and determine the minimum distance can meet the requirements of standards and regulations or not. Through the thinking, based on the balance equation and the space curve wire calculus method, a more accurate method of calculating the two wires in a variety of conditions the minimum spacing was derivated, and the sensitivity of the minimum distance was analysized based on the method.展开更多
An adaptive load balancing scheme is proposed to balance the load in ad hoc networks. The new scheme can be applied in most on-demand routing protocols resulting in significant performance improvement. The proposed sc...An adaptive load balancing scheme is proposed to balance the load in ad hoc networks. The new scheme can be applied in most on-demand routing protocols resulting in significant performance improvement. The proposed scheme is applied to the ad hoc on-demand distance vector （AODV） routing protocol. Simulation results show that the network load is balanced on the whole, and performance in packet loss rate, routing overhead and average end-to-end delay is also improved.展开更多
提出了一种基于配电系统安全域(DSSR)的网络重构新方法。首先,介绍了DSSR的安全裕度指标——安全距离,其含义为配电网满足N?1安全准则的馈线负荷最大可增功率。其次,建立了在优先满足安全约束的条件下以网损最小为目标的网络重构模型,...提出了一种基于配电系统安全域(DSSR)的网络重构新方法。首先,介绍了DSSR的安全裕度指标——安全距离,其含义为配电网满足N?1安全准则的馈线负荷最大可增功率。其次,建立了在优先满足安全约束的条件下以网损最小为目标的网络重构模型,并利用改进的遗传算法进行求解。最后,采用扩展的IEEE RBTS Bus 4算例验证模型的有效性。与经典网损最小模型对比表明,文中重构结果的网损与其接近,但安全裕度明显增加。与负载均衡模型对比,文中的安全裕度和网损均更优,这是由于模型能有效计及电网结构和负载分布不均的自然特性。此外,文中模型还能针对不同馈线设置个性化的安全约束,区别用户对安全性的不同需求。展开更多
文摘In the design of high voltage transmission lines inevitably needed to change the arrangement of wires, and the distance between the wires directly affected by changing the arrangement of the wires. The distance between the wires is difficult to judge by experiences. Therefore, it is urgently to develop a way to accurately calculating the minimum distance between the wires when changing the arrangement between the two wires, and determine the minimum distance can meet the requirements of standards and regulations or not. Through the thinking, based on the balance equation and the space curve wire calculus method, a more accurate method of calculating the two wires in a variety of conditions the minimum spacing was derivated, and the sensitivity of the minimum distance was analysized based on the method.
基金Project supported by the Science Foundation of Shanghai Municipal Commission of Science and Technology （Grant No.045115012）, and the Shanghai Leading Academic Discipline Project （Grant No.T0102）
文摘An adaptive load balancing scheme is proposed to balance the load in ad hoc networks. The new scheme can be applied in most on-demand routing protocols resulting in significant performance improvement. The proposed scheme is applied to the ad hoc on-demand distance vector （AODV） routing protocol. Simulation results show that the network load is balanced on the whole, and performance in packet loss rate, routing overhead and average end-to-end delay is also improved.
文摘提出了一种基于配电系统安全域(DSSR)的网络重构新方法。首先,介绍了DSSR的安全裕度指标——安全距离,其含义为配电网满足N?1安全准则的馈线负荷最大可增功率。其次,建立了在优先满足安全约束的条件下以网损最小为目标的网络重构模型,并利用改进的遗传算法进行求解。最后,采用扩展的IEEE RBTS Bus 4算例验证模型的有效性。与经典网损最小模型对比表明,文中重构结果的网损与其接近,但安全裕度明显增加。与负载均衡模型对比,文中的安全裕度和网损均更优,这是由于模型能有效计及电网结构和负载分布不均的自然特性。此外,文中模型还能针对不同馈线设置个性化的安全约束,区别用户对安全性的不同需求。
