基于GIS单线图的配网停电单模拟操作应用研究

配电网停电会造成电力系统供配电可靠性以及服务质量下降,研究基于地理信息系统(GIS)单线图的配网停电单模拟操作应用。利用网格长度作为基本单位建立坐标系,以选取起始点与终止点为基础,通过四参数法将GIS坐标映射至图纸网格内,实现配网内设备初步布局,将杆塔、站房和整体均匀分布作为优化目标,设置多目标优化目标函数实现GIS单线图最终优化。选取某电力公司配网作为单模拟操作应用对象,模拟结果表明,单模拟操作配网停电后,该配网各负荷点年故障率、次平均停电时间以及年停电时间均有所减少,可有效提升配网的供配电可靠性。     

3S技术应用现状与发展趋势

3S技术出现至今,已在诸多领域成功运用并产生了巨大的价值。文章简单介绍了3S三大组成部分:GIS、RS、GNSS的基本概念,分析了3S技术目前在农业、生态环境监测、土地资源管理以及智慧城市方面的应用现状以及对其在该方面未来的发展趋势进行展望。最后对目前3S在应用中遇到的一些问题进行了探讨,给未来3S技术的发展提供一些参考。     

GIS气体高压开关在阳煤五矿变电站的应用

针对阳煤五矿广场变电站的高压开关老化问题,为了保证安全性,采用了GIS气体的高压绝缘开关进行了改造。在改造后,变电站的安全性得到了显著提高,设备运行可以节省成本200多万元。     

Geospatial analysis for utilizing the marginal land in regional biofuel industry: A case study in Guangdong Province,China

Due to the intensive and exhaustive land use in China, the so-called marginal land is expected to play a major role in supporting the biofuel industry of the country. We developed a regional-level framework of using geospatial information technologies to achieve an optimal utilization of the marginal land for biofuel production. The framework includes identifying marginal lands, evaluating optimality of the land for growing certain bioenergy crops, estimating local potential feedstock production, and finally selecting optimal sites for biofuel factories. We present a case study of farming Jatropha (Jatropha curcas L.) and Cassava (Manihot esculenta Crantz) in Guangdong, China. The marginal land was identified from satellite imageries at a 30-m resolution. The optimality for growing the two species was evaluated using the Ecological Niche Models (ENMs), which incorporates local temperature, precipitation, soil, and terrain. The optimality value was then converted into potential feedstock production using a conversion model. The site selection for the factories incorporated the local potential feedstock production, the transportation cost measured by road distance, and the farming cost related to the land patch geometry. Each candidate site received an overall optimality score derived based on those factors. We identified five sites that have high scores and also minimal or none spatial overlaps of their supporting areas. Three of them (Zhanjiang, Yunfu, and Jieyang) are for Cassava, located on in southern Guangdong. Two (Qingyuan and Meizhou) are for Jatropha in northern Guangdong.     

基于GIS技术的工程地质环境系统构建及治理分析

针对传统的工程地质环境系统存在的收集图像与原始图像同向性较低的问题,以下开展了基于GIS技术的工程地质环境系统的构建研究。采用设计对比实验的方式验证该系统在实际应用过程中,可提升收集图像与原始图像的同向程度。     

BIM+GIS的综合管廊智慧管控一体平台应用探索

本文以综合管廊为管理对象,基于BIM+GIS,综合运用物联网技术、分布式光纤传感技术、PLC控制技术、大数据挖掘技术、室内高精度定位等关键技术,根据综合管廊在运维阶段的管理需求,全面整合管廊内部的各类实时和非实时数据资源,提供管廊的信息化和智慧化管理,为管廊内部空间的合理规划利用、管廊环境和内部设备的监测维护、应急管理的决策指挥提供技术支撑。并以某管廊的实际应用为例,说明智慧管控一体化平台在综合管廊运维阶段的应用效果。     

Hydrogen production potential from agricultural biomass in Punjab province of Pakistan

Depleting resources and popping environmental concerns instigate the development of sustainable and clean energy solutions. Amongst others, Hydrogen (H₂) is an imperious alternative due to the lowest emissions, higher calorific value, and usability. It has great relevance in Pakistan due to sequester Agricultural biomass potential that can be used as feedstock for H₂ production. So, this study estimates the H₂ production potential from agricultural biomass (rice, sugarcane, cotton, wheat, and maize) of Punjab, Pakistan. In doing so, simulations are performed using Aspen Plus under various conditions to derive an optimal value of H₂ output. The results indicate significant heterogeneity across districts and crop residues types. Therefore, the Geographic Information System (GIS) is used to draw the spatial distribution of optimal H₂ production across crops and districts. The simulated results reveal that Punjab province has the potential to produce 2619.90 × 10³ Metric tons (MT)/year H_2, and the highest potential derives from sugarcane trash (1012.77 × 10³ MT/year), followed by maize straw (433.67 × 10³ MT/year). The estimated H₂ potential (2.62 million MT/year) can be used in industries, transportation, and urea production as a sustainable alternative in Pakistan.     

基于BIM+GIS的大坝安全监测信息可视化展示技术研究

为了解决传统大坝监测信息三维可视化程度低,展示不够直观、形象等问题,采用BIM+GIS技术,将监测信息展示从传统二维空间拓展到三维空间。对BIM建模、模型轻量化、三维可视化展示以及系统功能设计进行了研究,通过在桃源水电站的应用实例表明,BIM+GIS技术能够实现大坝安全监测信息三维可视化展示,展示效果更为形象、生动,具有广泛应用前景。