现代建筑弱电管网智能控制系统设计研究

随着城市化进程的加快,现代建筑的智能化程度越来越高,从整体角度看,控制系统中的信息传递的效率已成为制约技术进步的瓶颈。针对现代化楼宇电力网络智能化监控系统存在的控制带宽过小问题,应从优化系统性能角度入手,全面升级系统。此外,在硬件上,本文从以太网、微型控制器、显示器三个角度进行优化;在软件上,通过实现弱电管网智能控制的自动化采集,并根据信号和数据的同步变换函数,完成数据的处理。基于这些,可以通过构建Lontalk通信协议,来实现分析各控制电源之间的相互关系,实现低压电力管网的智能化控制,并最终完成整个系统的设计。

基于IoT+GIS技术的校园弱电管网智能监控管理系统设计和应用

针对校园弱电管网在信息化建设和运行过程中的特点和存在问题,结合智慧校园发展的实际需要,设计基于IoT+GIS技术的弱电管网智能监控管理系统,建立校园地理空间信息库和弱电管网基础数据库,实现地下管道铺设、光缆路由分析、光纤熔接关系、楼内综合布线及井口异动监控等弱电通信资源的三维可视一体化管理,大幅度提高校园弱电管网资源的管理维护效率,并为合理有效使用这些资源提供科学决策依据.

小区弱电管网建设

本文就住宅小区弱电管网的布线系统和管网配置等设计中的几个主要问题进行了探讨。

浅析住宅小区弱电管网建设

本文对住宅小区弱电管网建设的方方面面进行了深入浅出的论述,提出一次性建设好小区弱电管网的重要性以及就如何进行小区弱电管网建设进行探讨。

现代建筑弱电管网智能控制系统设计

随着城市发展水平的不断提高,现代楼宇智能化程度日益提升,信息传输效率成为技术发展的瓶颈。为解决现代建筑弱电管网智能控制系统控制波特率低的问题,优化设计此系统。硬件方面对以太网、微型控制器以及显示器展开优化设计,软件方面通过自动采样弱电管网智能控制数据,基于信号与数据之间的同步转换功能处理该数据,建立Lontalk通信协议,分析控制功率相关性,实现弱电管网智能控制,从而完成系统设计。在此基础上设计实例分析,结果表明设计的控制系统控制波特率明显高于对照组,能够解决传统系统控制波特率低的问题。

基于弱电管网分析的城市地下线网集约化动态管理系统设计

传统的城市地下线网集约化动态管理系统管理效果较差,为此设计一个基于弱电管网分析的城市地下线网集约化动态管理系统,以此完成城市地下线网集约化动态管理系统的设计。

浅议小区弱电布线管网设计

本文介绍小区弱电布线管网的统一规划及设计图纸要求。

Optimal gateway deployment under different queuing mechanisms in smart grid

By optimizing the network topology, this paper proposes a newmethod of queuing theory clustering algorithm based on dynamic programming in a home energy management system（ HEMS）. First, the total cost of the HEMS system is divided into two parts, the gateway installation cost and the data transmission cost. Secondly, through comparing two kinds of different queuing theories, the cost problem of the HEMS is converted into the problem of gateway deployment. Finally, a machine-to-machine（ M2M） gateway configuration scheme is designed to minimize the cost of the system. Simulation results showthat the cost of the HEMS system mainly comes from the installation cost of the gateways when the gateway buffer space is large enough. If the gateway buffer space is limited, the proposed queue algorithm can effectively achieve optimal gateway setting while maintaining the minimal cost of the HEMS at desired levels through marginal analyses and the properties of cost minimization.

光纤同步网讲座（六）：SDH／SONET网络建设与管理

文章首先概述了ＳＤＨ／ＳＯＮＥＴ网络的规划原则和电信管理网原理结构，接着着重论述了ＳＤＨ／ＳＯＮＥＴ网络结构与管理、ＳＤＨ／ＳＯＮＥＴ管理信息模型以及ＳＤＨ／ＳＯＮＥＴ管理网络的主要功能，最后给出ＳＤＨ／ＳＯＮＥＴ网络管理平台的一般组成，指出它是扩大管理能力，实现智能化网络的保证。

Numerical analysis on heat transfer of laser diode module by equivalent electrical network method

Because it is complex and inconvenient to use the common temperature field calculating method and experiment method, for arialyzing heat transfer properties of laser diode module （LDM）, an equivalent electrical network method is presented in this paper. Simulation results show that the temperature stability is closely related to ambient temperature, heat sink, LDM current and TEC current. Ambient temperature and TEC controller are the dominant terms effecting on temperature control in practice,

Basic Research on Key Techniques Related to Urban 3D Pipe Network Modeling

A new geometric modeling approach is introduced in this paper.First the principle of modeling of 3D pipe network is discussed in detail.Then the procedures of implementing pipe network visualization and system functions are presented.Last,several efficient methods for speeding up display of graphics are introduced.The new geometric modeling approach offers to people a new way to solve 3D visualization of complex urban pipe network.

An Overview of the Smart Grid in Great Britain

This paper presents an overview of the current status of the development of the smart grid in Great Britain(GB).The definition,policy and technical drivers,incentive mechanisms,technological focus,and the industry's progress in developing the smart grid are described.In particular,the Low Carbon Networks Fund and Electricity Network Innovation Competition projects,together with the rollout of smart metering,are detailed.A more observable,controllable,automated,and integrated electricity network will be supported by these investments in conjunction with smart meter installation.It is found that the focus has mainly been on distribution networks as well as on real-time flows of information and interaction between suppliers and consumers facilitated by improved information and communications technology,active power flow management,demand management,and energy storage.The learning from the GB smart grid initiatives will provide valuable guidelines for future smart grid development in GB and other countries.

Fabrication and thermal performance of grooved-sintered wick heat pipe

Some novel grooved-sintered composite wick heat pipes(GSHP) were developed for the electronic device cooling.The grooved-sintered wicks of GSHP were fabricated by the processes of oil-filled high-speed spin forming and solid state sintering.The wick could be divided into two parts for liquid capillary pumping flow:groove sintered zone and uniform sintered zone.Both of the thermal resistance network model and the maximum heat transfer capability model of GSHP were built.Compared with the theoretical values,the heat transfer limit and thermal resistance of GSHP were measured from three aspects:copper powder size,wick thickness and number of micro grooves.The results show that the wick thickness has the greatest effect on the thermal resistance of GSHP while the copper powder size has the most important influence on the heat transfer limit.Given certain copper powder size and wick thickness,the thermal resistance of GSHP can be the lowest when micro-groove number is about 55.

Information System Functions for SmartGrid Management

The violently penetration of renewables in power supply network leads to situations, by which the offer exceeds the demand. Therefore, it is necessary to include a system for processes＇ management. SmartGrid is a platform over the power supply network. It is represented with its network and services, which also have to be managed. The paper aims to show the second stage of SmartGrid management modeling. It meets heterogeneous requirements of the actors--subscriber without photovoltaics, subscriber with photovoltaics, service provider, network operator, and network elements operator--to service and network management and is oriented to functional areas, covering the life cycle of power supply service： Design, Planning, Installation, Provision, Configuration, Maintenance, Performance, Accounting, Buying Up, Security and Subscriber Control. Functional models for existing networks--telecommunications--are used and they are adapted to power supply. The results are illustrated with three functional areas for service management： Accounting, Buying Up, and Performance. The synthesis of network management functions and network element management functions are similar.

A Jury-Based Trust Management Mechanism in Distributed Cognitive Radio Networks

In the trust management scheme of the distributed cognitive radio networks, the absence of the central control devices cause many problems such as a lack of standardized control for trust computation, and the absence of the decision makers in trust evaluation and collaborative decision making. A trust management mechanism based on the jury system for distributed cognitive radio networks is proposed in this paper. The "jury user" is designed to collaboratively examine the reputation of the cognitive user in the networks and to perform data fusion and spectrum allocation for distributed cognitive radio networks. Simulation analysis results show that the proposed scheme can ensure accuracy and fairness in trust evaluation and improve effectiveness and flexibility of spectrum allocation.

Thermal analysis of laser diode module by an equivalent electrical network method

An equivalent electrical network method is presented in this paper to analyze the cooling characteristics of a laser diode module (LDM).And a modified equivalent model of a thermoelectric cooler (TEC) with an adjunctive thermal resistance and a contact resistance is proposed.The performance of a commercial TEC has been simulated.The thermal analysis of a LDM incorporated with a TEC has been performed by using an equivalent circuit model of the LDM.In the analysis the change of LD current,TEC current,and the ambient temperature are all considered.It shows that the equivalent circuit approach is an effective tool for the qualitative analysis of TEC and LDM.

Research on inventory management and demand forecasting

With the rapid economic development and the increasing speed and scale of grid construction, material procurement and management, cost control is facing new demands and challenges.This paper proposes on innovative management and forecasting methods, from inventory management and demand forecasting perspective supplies,through these two key nodes in-depth research and analysis, this paper provides a theoretical support for the realization of effective materials management.

An Approach for Cost-Efficient Grid Integration of Distributed Renewable Energy Sources

We describe a specific approach to capacity man a ge ment for distribution grids. Based on simulations, it has been found that by curtailing a maximum of 5% of the yearly energy production on a per-generator basis, distribution grid connection capacity can be doubled. We also present the setting and fi rst results of a fi eld test for validating the approach in a rural distribution grid in northern Germany.

Reducing the Short Circuit Levels in Kuwait Transmission Network

This paper describes the study analysis performed to evaluate the available and potential solutions to control the highly increasing short circuit （SC） levels in Kuwait power system. The real Kuwait High Voltage （HV） network was simulated to examine different measures at both 275 kV and 132 kV stations. The simulation results show that the short circuit currents exceed the permissible levels （40 kA in the 132 kV network and 63 kA in the 275 kV network） in some specific points. The examined measures include the a study on changing the neutral point policy, changing some lines from alternating current （AC） to direct current （DC）, dividing specific bus bars in some generating stations and applying current limiters. The paper also presents a new plan for the transmission network in order to manage the expected increase in short circuit levels in the future.