柴油发电应急电源供电系统在超高层建筑的应用研究

为了确保超高层建筑供电安全性、可靠性和节约能源等要求,本文以某工程使用的柴油发电应急电源系统为对象,针对柴油发电供电系统的启动、备投、市电等不同状态下柴油发电系统的工作模式、柴油发电系统正常工作状态下系统负栽管理等进行研究,为今后类似工程施工提供借鉴.     

柴油发电机房的通风

柴油发电机房的良好环境对柴油发电机的正常运行将起到十分重要的作用,本文着重介绍了柴油发电机房的通风,排烟和消声,以保证柴油发电机组功率的正常发挥。     

柴油电控喷射系统分析

柴油机电控燃油喷射系统一般都是由传感器、电控单元(ECU)和执行器等3部分组成。各种传感器为ECU提供发动机的工况和使用条件的信息,使ECU作出判断和计算,向执行器喷油器、喷油泵(柴)发出指令电信号,调节供油量和供油定时(柴油机),以达到调节发动机运行状态的目的。柴油发电机组属于集机械,电子为一体的技术密集型产品,其能有效提升柴油发电机运行的可靠性,因而在各重要部门为保障供电发挥了关键性作用。基于上述背景,文章对柴油电控喷射系统及其基本构件、优点及工作原理等展开了详细分析。     

柴油发电机房的通风

柴油发电机房的良好环境对柴油发电机的正常运行将起到十分重要的作用,本文着重介绍了柴油发电机房的通风,排烟和消声,以保证柴油发电机组功率的正常发挥．     

直流电动钻机变流器运行状态分析

在当今世界能源紧缺的情况下,节约能源减少石油钻井生产时的能源消耗,显得更为重要。特别在国际电气行业对用电设备作了明确规定,严禁使用功率因数低的电气设备。面对此情况我们必须对直流电动钻机由无功功率大而引起的发电机功率消耗大的现状加以改进。     

论无功补偿与柴油发电机油耗

通过利用无功补偿设备的无功补偿能力,调节和改善机保车电气系统的功率凶数（即无功功率补偿）,来挖掘柴油发电机的发电潜力,提高供电设备的运行效率,从而达到降低单位油耗、提高企业经济效益的最终目的。     

浅谈井下供电系统设计分析

矿山井下配电变压器广泛采用中性点不接地供电系统，并禁止由地面上中性点接地的变压器和发电机向井下供电，矿井供电系统设计是矿山电力系统的重要组成部分。本文对井下供电系统设计进行了分析。     

基于MATLAB优化工具箱的柴油发电机组的优化运行

借助MATLAB中的优化工具箱,对多台不同容量的柴油发电机的并联运行进行优化.根据等微增率原理,对柴油机组的总耗量建立了目标函数.为了使柴油机经济稳定可靠运行,在总负荷一定的条件下通过柴油发电机组对负荷供电,在符合各个柴油发电机运行上、下限的情况下,使每台柴油发电机都运行在比较理想的工作点,减少了能源消耗.     

柴油发电机噪声的综合治理

柴油发电机噪声的综合治理蒋芝楠，李建华（姜堰市环境监测站）（姜堰市减震降噪研究所）一、前言姜堰市邮电局地处市中心。为解决正常连续供电，在邮电大楼北侧安装了２００ｋＷ和３００ｋＷ柴油发电机各壹台。发电机房北侧仅隔ｇｍ为居民住宅楼群，无法搬迁。柴油发电机...     

浅谈汽车蓄电池工作特性与故障排除

汽车蓄电池在起动发动机期间,它向起动电机、点火系、电子燃油喷射和发动机的其它电气设备供电。当发动机停止运转或低怠速运转的时候,由它给汽车电器附件供电。当发电机超负荷时,协助发电机供电它起到了整车电气系统的电压稳定器的作用且能长期储能量。由此可见其作用的重要性。本文对汽车蓄电池工作特性与故障排除进行了详细的介绍,以供相关人员参考。     

华东油气田钻机网电技术使用分析

目前国内大部分油田使用的钻机均是机械钻机,主用柴油机给钻井系统提供动力,需消耗大量的柴油,钻井成本较高,工人的劳动强度又大,噪声等环境污染严重。为响应国家节能减排降耗求,六普钻井分公司在江苏工区应用油改电技术即钻机网电技术,不仅省钱、省油,节约钻井成本,还可减少现场的噪声、废气排放和油污污染,缓解工农矛盾,可实现节约、安全、清洁和高效生产。通过几十口井实践,取得了“低碳钻井”、“绿色钻井”、降低能耗的效果。本文对该技术进行综合分析,为推广此项技术和钻井队降本增效提供可靠依据。     

Reliability/cost implications of utilizing photovoltaics in small isolated power systems

The rapid growth of renewable energy applications in electric power systems dictates a need to develop comprehensive techniques that can be used to evaluate the economics involved and the reliability of power supply that can be achieved from the utilization of these energy sources. Photovoltaic (PV) arrays have the potential to significantly reduce operating costs in remote small systems which are generally supplied using costly diesel fuel. This paper presents a simulation method that provides objective indicators to help system planners decide on appropriate installation sites, selection of PV arrays or diesel units in capacity expansion and optimum PV penetration levels when utilizing PV energy in small isolated systems.     

Optimal operation of a distributed energy generation system for a sustainable palm oil-based eco-community

The palm oil industry potentially can be environmentally sustainable through utilizing the vast availability of biomass residues from palm oil mills as renewable energy sources. This work addresses the optimal operation of a combined bioenergy and solar PV distributed energy generation system to meet the electricity and heat demands of an eco-community comprising a palm oil mill and its surrounding residential community. A multiperiod mixed-integer linear programming planning and scheduling model is formulated on an hourly basis that optimally selects the power generation mix from among available biomass, biogas, and solar energy resources with consideration for energy storage and load shifting. A multiscenario approach is employed that considers scenarios in the form of many possible weather conditions and various energy profiles under varying mill operation modes and residential electricity consumption. The proposed approach is demonstrated on a realistic case study for a palm oil mill in the Iskandar Malaysia economic development region. The computational results indicate that biomass-based resource is the preferred renewable energy to be implemented due to the high cost associated with solar PV. As well, load shifting and energy storage can be feasibly deployed for demand peak shaving particularly for solar PV systems.     

Generating capacity adequacy evaluation of small stand-alone power systems containing solar energy

This paper presents a time sequential simulation method for generating capacity adequacy evaluation of small stand-alone power systems containing solar energy (PSCSE) operating in parallel with battery storage. The reliability performance of such a system is quite different from one containing only conventional generation. This is due to the chronological random nature of the solar radiation level and the dependencies associated with the power output of every photovoltaic (PV) generating unit at the site location. The adequacy of a PSCSE depends on various factors such as the solar radiation level, the battery size and charging (discharging) capability, the failure/repair characteristics of the diesel generator (DG) and the PV unit, the system load profile and peak load and the solar energy penetration level in the system etc. The methodologies, results and discussions presented in this paper should provide valuable information to utilities involved in planning and operating stand-alone systems utilizing both conventional and solar energy.     

光蓄互补系统接入对配电网供电可靠性的影响

光蓄互补系统接入对配网的供电可靠性有较大影响.首先,介绍了典型系统的负荷曲线和光伏出力曲线特点,以及储能运行策略、配网供电可靠性评估指标和评估方法;然后,讨论了不同出力光伏系统、不同容量储能和光蓄互补系统接入对负荷曲线和配网供电可靠性的影响.最后,比较并分析了光伏、储能和光蓄互补系统对配电网供电可靠性的不同影响.研究结果可为光蓄互补系统的容量优化配置提供参考.     

掘锚一体机机载式探放水钻机控制系统的设计

为了解决传统坑道钻机在进行掘进巷道探放水作业时由于体积庞大而不便于快速安装和作业的问题,设计了一种掘锚一体机机载式探放水钻机。介绍了机载式探放水钻机的结构及其自动电控系统的总体架构,设计了控制系统的硬件,分析了其工作流程,进行了探放水钻机厂内和井下工业性实验,实验结果验证了所设计的探放水钻机控制系统的可行性。采用所研制的探放水钻机可以显著提高探放水作业效率,其具有良好的应用前景。     

Optimizing Decision-Making of A Smart Prosumer Microgrid Using Simulation

Distributed renewable energy sources offer significant alternatives for Qatar and the Arab Gulf region’s future fuel supply and demand. Microgrids are essential for providing dependable power in difficult-to-reach areas while incorporating significant amounts of renewable energy sources. In energy-efficient data centers, distributed generation can be used to meet the facility’s overall power needs. This study primarily focuses on the best energy management practices for a smart microgrid in Qatar while taking demand-side load management into account. This article looked into a university microgrid in Qatar that primarily aimed to get all of its energy from the grid. While diesel generators are categorized as a dispatchable distributed generation with energy storage added to handle solar radiation from the sun and high grid power operating costs in the suggested scenario, wind turbines and solar Photovoltaic (PV) are classified as non-dispatchable distributed generators. The resulting linear math issues are assessed and displayed in MATLAB optimization software using a mixed-integer linear programming (MILP) strategy. According to the simulation results, the suggested energy management strategy reduced the university microgrid’s grid power costs by 38.8%, making it an affordable solution which is somehow greater than the prior case scenario’s 23% savings. The installed solar system capacity’s effects on the economy, society, and finances were also assessed, and it became clear that the best option for the smart microgrid was determined that would be 325 kW of solar PV, 25 kW of wind turbine, and 600 kW of diesel generators, respectively. Given the current situation, university administrators are urged to participate in distributed generators and adopt cutting-edge designs for energy storage technologies due to the significant environmental and financial benefits.     

山地物探电动钻机模块化设计及安全性分析

以燃油发动机驱动的山地物探钻机在钻井时噪声大,尾气排放严重,钻井效率低,拆装、搬运不便。为解决上述问题,以电能驱动代替燃油机驱动,提出了山地物探电动钻机模块化设计方案。基于模糊综合评价法,开展了电动钻机驱动电机和传动方式的定量评价,确定其驱动电机为永磁同步电机,传动方式为链轮链条传动,同时通过对比优选出电动钻机的减速器、支撑部件和导向部件分别为涡轮蜗杆减速器、π形底盘和单桅杆。在此基础上,采用有限单元分析方法进行了电动钻机的安全性分析,结果表明：钻机的最大应力出现在π形底盘连接桅杆的直角处,其值小于钻机材料的许用应力,钻机的结构安全,且电机电路安全可靠。钻井实验结果表明：自主设计的山地物探电动钻机较现有山地物探钻机质量减小了57%,钻井作业时噪声低,无尾气排放,可提供的最大提升力和扭矩分别超过设计标准的71%与6.25%,表明其整体性能符合要求。研究结果为绿色高效的油气勘探装备的研发提供了参考。     

Ein Konzept zur Wirkungsgradoptimierung von Einzylinder-Dieselgeneratoren mittels Optimalsteuerung und Extremum-Seeking

In this contribution the problem of maximizing the efficiency of a hybrid power unit at a specified output power level by optimizing the generator current trajectory as well as the design variables that can be chosen during the machine design process is investigated. The concept is demonstrated based on a hybrid single-cylinder diesel engine that is coupled to an electric generator. By developing a model of the system and using open-loop optimal control the optimal operating strategy and the optimal machine design are determined. Besides that, the problems occurring in the application of this strategy to a test rig are discussed. For this purpose, a model-free real-time optimization concept based on extremum seeking control is presented. The effectiveness of both the model-based and the model-free concept are demonstrated by simulation and experimental results.     

Optimal design of an absorption chilled water storage air conditioning system driven by waste heat

In order to meet both economic and energy requirements, this study has proposed an optimal design to minimize the sum of the initial and operation energy costs for a 1200 refrigeration ton chiller and 12 water storage tanks in an absorption chilled water storage air conditioning system. Various power consumption calculation methods for the main devices are included to predict the performance of this equipment under different operating conditions. In addition, the performance curves of the water storage tank under the storage and discharge modes are calculated using Fluent software. The article uses five control strategies for a cooling tower along with three hot water inlet temperatures of a generator to simulate the optimal design of a system. The results show that the least power (10,336 kWh) is consumed when the cooling tower’s outlet temperature is 32°C and the generator’s inlet hot water temperature is 105°C.