基于微分进化算法的发电商机组出力综合性优化策略

提出了一种新的基于改进微分进化算法的电力市场机组出力综合性优化策略。根据机组出力与市场电价之间的协调联动关系,以交易日售电总利润最大化为目标,综合考虑机组运行成本、阀点效应、环境保护成本、实际报价风险系数,构建了交易日机组分时段出力优化模型,由此得出机组的综合性发电优化方案。设计了一种加入随机扰动因子进行变异以克服收敛早熟的微分进化算法对所构建的具有非线性、非凸特性的动态规划模型进行快速准确地求解。算例的仿真分析结果验证了该方法的可行性和优越性。     

影响电网安全运行的各类故障及其相应对策

在统计分析了近10年来全国电网运行各类故障的基础上,对当前电网事故发生的特点和规律进行了分析总结,指出了制约电网安全运行的主要因素,并提出了相应的对策。     

哈三电厂600 MW机组节能启停过程的运行优化

阐述了哈三电厂二期2台600 MW机组近年来的启停机节能状况。从设备启停方式和机组改造分析了影响机组启停的经济因素,提出了启停机节能降耗的运行技术措施。     

电动机常见故障与处理方法

大部分电机属于老式电动机,使用年限较长,电机烧毁的事故常有发生,而且呈上升趋势,无法长期可靠运行,严重影响着生产、生活的安全。通过作者多年积累的电机维护、维修的经验,针对一些电动机最常见的绕组故障、机械故障以及相应判断、处理做以简单介绍。     

300 MW机组变压运行方式的研究

针对300 MW机组运行经济性问题,通过试验测定了不同负荷下定压运行或变压运行时的供电煤耗、热耗、汽耗、汽动给水泵单耗、再热汽温等指标,并进行了对比和分析。结果显示,机组负荷在240 MW以下时采用四阀全开变压运行比较经济。     

两台变压器的经济运行对节能降损的影响分析

随着能源的日益短缺,各行各业对节能降损越来越重视.在电力行业中,配网损耗中的60％是由变压器贡献的,因此实现变压器的经济运行对用电企业的节能降损具有重要要义.以江门地区某工厂为实例进行了计算论证,针对性的提出了两台同容量和不同容量变压器经济运行的方法.     

Basic actions to improve energy efficiency in commercial buildings in operation

Numerous studies have focused on improving energy efficiency in commercial buildings. Engineers and researchers have developed complex methods to improve energy efficiency, but buildings are often managed by non-specialised technicians who need understandable and cost-effective actions to implement in their buildings. This paper presents basic actions on which to base improvements in energy efficiency in commercial buildings in operation. Furthermore, obtained results and details of the implementation of these techniques in various buildings in the Universitat Politècnica de València are presented.     

Optimal haulage routing of off-road dump trucks in construction and mining sites using Google Earth and a modified least-cost path algorithm

This study presents new software, called Google Earth-based Optimal HAulage RouTing System (GEOHARTS), to improve the functionality of Google Earth for optimal haulage routing of off-road dump trucks in construction and mining sites. A modified least-cost path algorithm, which is applicable to working areas with both paved and unpaved temporary roads and can consider the effects of terrain relief and curves along a route on the route planning, was proposed and utilized for the software development. GEOHARTS can determine optimal haulage routes between loaders and dumps that ensure the least travel time or fuel consumption of off-road dump trucks and can visualize the results using an embedded 3D render window of Google Earth. The application to the Pasir open-pit coal mine in Indonesia demonstrates that GEOHARTS could provide a rational solution to support the truck haulage operations.     

烧结脱硫系统运行维护分析

通过分析钢铁企业烧结烟气脱硫系统运行中的常见故障及其原因,提出了相应的措施和对策,以指导湿式石灰-石膏法烧结烟气脱硫系统的运行管理及其日常维护、保养工作。     

Design and performance of vacuum capable detector electronics for linear position sensitive neutron detectors

We describe the design and performance of electronics for linear position sensitive neutron detectors. The eight tube assembly requires 10 W of power and can be controlled via digital communication links. The electronics can be used without modification in vacuum. Using a transimpedance amplifier and gated integration, we achieve a highly linear system with coefficient of determinations of 0.9999 or better. Typical resolution is one percent of tube length.