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主动配电网中的自动化配电终端直接影响到状态估计精度和电网可靠性。分析配电网量测配置特点,利用状态估计灵敏度矩阵确定量测估计方差的表达,构成平均估计方差指标,依照新量测对平均估计方差指标贡献系数的大小确定新量测设备的安装次序。以配电终端经济性指标和状态估计方差指标加权形成目标函数,配网可靠性和电压合格率等为约束条件,迭代求解最优FTU配置。考虑了配电网量测配置的经济性、可靠性和对状态估计误差的影响。通过118节点算例,分析了"三遥"、"二遥"两个优化阶段的优化过程和结果,说明算法的可行性。 相似文献
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水泵是发电厂主要耗电设置之一,其测试也是电厂节能的工作重点,文章从热力学原理出发,对利用热力学方法测试水泵效率进行过是在不适用常规测试的情况下采取的一种行之有效的方法。 相似文献
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IPv4 and IPv6 will coexist for many years during the transition period from the traditional IPv4-based Internet to an IPv6-based Internet.DHTLayer,a novel IPv4/IPv6 transition mechanism based on Distributed Hash Table(DHT) is presented in this paper.It can fully support IPv4 and IPv6 inter-operation.DHTLayer employs a DHT overlay to maintain the routing information between IPv4 and IPv6.It decouples path selection from packet delivery.In DHTLayer,the Looking-Up Route Path is responsible for selecting paths,... 相似文献
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The highly mobility of vehicles, intermit-tent communication between the vehicles and the requirements of real time applications are some of the main challenges of multi-hop message delivery in Vehicular Ad Hoc Networks(VANETs).There are also additional challenges, especially when the des-tination for the message delivery is a moving vehi-cle. In this paper, we propose a novel multi-hop message delivery method, called the Coverage Area-based oPportunistic message forwarding algorithm (CAP). The main idea of CAP is to cover the poten-tial area of a moving target vehicle as much as pos-sible with the reachable area of the required deliver-y messages, so that the message can be delivered successfully. Because the success ratio and overhead of the multi-hop message delivery are two important but incompatible parameters in CAP, two tunings are discussed in the algorithm in order to maintain the balance of the two parameters. The simulation results show that compared with other reference ap-proaches, CAP provides an efficient message deliv-ery with a higher success ratio and a shorter mes-sage delay. 相似文献