Implementation of Machine-to-Machine Solutions to Improve Quality of Service for Electrical Energy Distribution Networks in Colombia

In order to incorporate smart elements into distribution networks at ITELCA laboratories in Bogotá-Colombia, a Machine-to-Machine-based solution has been developed. This solution aids in the process of low-cost electrical fault location, which contributes to improving quality of service, particularly by shortening interruption time spans in mid-voltage grids. The implementation makes use of a GENEKO modem that exploits its digital inputs together with a full coverage of certain required auxiliary services so as to generate proper detection signals whenever failure currents occur;which allows incorporating the latest failure detection technology into the system.

Facing a Problem of Electrical Energy Quality in Ship Networks-measurements, Estimation, Control

In this paper, electrical energy quality and its indices in ship electric networks are introduced, especially the meaning of electrical energy quality terms in voltage and active and reactive power distribution indices. Then methods of measurement of marine electrical energy indices are introduced in details and a microprocessor measurement-diagnosis system with the function of measurement and control is designed. Afterwards, estimation and control of electrical power quality of marine electrical power networks are introduced. And finally, according to the existing method of measurement and control of electrical power quality in ship power networks, the improvement of relative method is proposed.

Application of Extended Kalman Filter to the Modeling of Electric Arc Furnace for Power Quality Issue

Electric arc furnaces(EAFs)represent one of the most disturbing loads in the subtransmission or transmission electric power systems.Therefore,it is necessary to build a practical model to descript the behavior of EAF in the simulation of power system for power quality issues.This paper deals with the modeling of EAF based on the combination of extended Kalman filter to identify the parameter of arc current and the power balance equation to obtain the dynamic,multi-valued u-i characteristics of EAF load.The whole EAF systems are simulated by means of power system blockset in Matlab to validate the proposed EAF model.This model can also be used to assess the impact of the new plant or highly varying nonlinear loads that exhibit chaos in power systems.

Electrical Energy Quality Analysis in Hospital Centres

Today, energy is a vital component in the functioning of a hospital. Hospital technical facilities have several types of technologies, these include appliances for use;examination apparatus. So, for Quality Health Care in a hospital, there is a need to ensure the proper functioning of hospital equipment. In addition to the required maintenance as specified by the device manufacturer, the quality of the electrical energy across the device must be ensured. This article is an analysis of the quality of electric energy at the substation of National Hospital of Niamey. Thereby, the data collection, followed by the data processing and analysis revealed the parameters characterizing the quality of electrical energy across the substation. Our studies have shown that the substation is underutilized as the maximum inrush current is less than half the available current. The current was consumed by the three phases has resulted in a strong current unbalance (230 A). However, the current unbalance and the voltage amplitude, are admissible accordingly base on EN50160 standard. Furthermore, the harmonics voltages present in this medium are in the accepted range (1.8%) according to IEEE 519 standard. However, the fundamental frequency does not meet the standard, but the difference obtained has no adverse effect.

Implementation of Machine-to-Machine Solutions Using MQTT Protocol in Internet of Things (IoT) Environment to Improve Automation Process for Electrical Distribution Substations in Colombia

In order to incorporate smart elements into distribution networks at ITELCA laboratories in Bogotá-Colombia, a Machine-to-Machine-based solution has been developed. This solution aids in the process of low-cost electrical fault location, which contributes to improving quality of service, particularly by shortening interruption time spans in mid-voltage grids. The implementation makes use of MQTT protocol with an intensive use of Internet of things (IoT) environment which guarantees the following properties within the automation process: Advanced reports and statistics, remote command execution on one or more units (groups of units), detailed monitoring of remote units and custom alarm mechanism and firmware upgrade on one or more units (groups of units). This kind of implementation is the first one in Colombia and it is able to automatically recover from an N-1 fault.

Flexible Power Supply System of AC Electric Arc Furnace

The AC electric arc furnace(EAF)is becoming a core apparatus of the modern steel industry.Nevertheless,it used to be a major threat of power quality in the traditional power supply system.In this paper,a flexible power supply system of the AC EAF is proposed,which is expected to completely alter its inherent cognition of impact load in the power grid.The basics of the power supply for EAF are first reviewed and the novel techniques to enhance the operation flexibility of EAF are introduced.The power circuit and the control structure are then presented,followed by the detailed strategies of various operations fully considering the features of EAF.A large disturbance stability criterion based on the mixed potential theory is also established for the practical application.Both electromagnetic transient simulations using PSCAD and benefit analyses verify the feasibility of the proposed system.

面向功率冲击平抑的岸电系统储能型电能调控装置容量优化配置策略

针对港口岸电系统负荷侧存在的冲击性功率等电能质量问题,提出一种储能型电能调控装置容量优化配置方法。介绍港口岸电系统及储能型电能调控装置拓扑结构,并分析冲击性负荷运行特征;探讨负荷运行工况与功率因数控制目标之间的关系,根据电池荷电状态与负荷运行工况,提出储能型电能调控装置多类型运行工况自适应容量设计的补偿控制策略;建立储能型电能调控装置技术-经济模型,通过在技术模型中考虑岸电系统电能质量的要求建立容量模型,经济模型提供评估寿命成本和效益的方法。基于某港口岸电负荷实测数据,验证所提方法的有效性。

基于?分析的热电联产能耗一致性评价方法

现有热电联产能耗评价“好处归热”或“好处归电”,将节能效益单一划分给发电或供热,不能合理反映热、电两种能量的品位差异。为弥补上述不足,将蒸汽划分为凝汽流和供热流,把循环?损失依据产生根源分摊到发电和供热上,通过?分析建立电、热产品定量统一表征方法和电热能耗一致性表达式。用能质系数简化动态过程计算,将基于?分析的热电联产单耗分析模型拓展至描述电热能耗的时空分布。通过实际案例验证新算法合理性。结果表明:供热流向热网水释放的?与循环?损失构成供热量;热电联产通过回收冷源?供热和能质匹配实现发电侧和供热侧节能。能耗一致性评价方法可合理反应电热两种产品的能量品位,揭示热电联产发挥节能潜力的途径。

基于TRNSYS的太阳能-电能互补采暖系统研究

针对我国北方农村地区冬季采暖污染严重、碳排放量大等问题,文章以沈阳市某地区典型农村单体式住宅为研究对象,综合考虑太阳能、电能,提出2套清洁供暖方案。首先对太阳能集热器的集热倾角和面积的选择进行优化,然后选取沈阳市供暖季温度较低的2天,根据天气情况分别作为晴天与阴天典型日,最后利用TRNSYS软件对供暖方案在典型日天气条件下模拟运行。结果表明在典型日天气条件下本研究提出的2种供暖方案均满足环保、室内温度适宜等采暖需求,且太阳能集热器+变频电磁采暖炉供暖方案更为节能。

冲天炉和电熔炉熔制岩棉之比较

冲天炉和电熔炉是制备岩棉熔体的两种生产方式与装备。通过阐述冲天炉和电熔炉两种熔制工艺,围绕原料及要求、能源及熔制方式、烟尘排放处理,对比两种工艺差别及效果,电熔炉在节省能源、减少排放、提高生产效率、利用固体废弃物和液态废渣等方面,具有明显的优势。

三相电力弹簧的无源控制策略研究

针对太阳能、风能等新能源设备大规模并入电网造成的电能质量下降问题,近年来出现了电力弹簧(ES)的概念。依据推导出的三相电力弹簧(TPES)的数学模型,搭建了对应的系统模型,依据无源控制(PBC)理论,分析了系统的无源性,并分别采用传统PI控制和无源控制验证了三相电力弹簧能够维持关键负载(CL)电压的稳定。通过仿真和实验验证,在有功功率变动工况下,无源控制的超调量远远低于PI控制的13.7%,调节时间0.03 s也低于PI控制的0.07 s,静差率0.0002%也小于PI控制的0.08%,表明无源控制的动态性能和静态性能都更出色。此外,相比于传统的PI控制,无源控制所需参数更少,控制系统结构更加简单。

电动汽车充电站群电能质量协同监测技术

为解决现有电能质量监测技术存在的监测范围小、精度低的问题,优化设计电动汽车充电站群电能质量协同监测技术。根据电动汽车充电站群的组成结构,构建充电站群模型,模拟充电过程。针对电能质量指标配置相应的电能质量监测点,协同采集与处理电动汽车充电站群暂态信号,通过对扰动、谐波/间谐、电压偏差、频率偏差等指标的计算,得出电能质量的协同监测结果。通过与现有监测技术的对比,所设计监测技术的监测范围扩大了1306.24m^(2),且监测误差更低。

智能物联电能表扩展功能模组设计

在能源转型和数字化革命的大背景之下,仅具备传统计量、收费、通信功能的智能电能表,已经无法支撑能源互联网快速发展带来的迫切需求。文中设计了一款具备硬件扩展功能的智能物联电能表,通过采用多芯、模组化的理念,设计各类模组的标准化接口,为扩展功能模组提供电源、通信接口以及原始采样数据,可满足电力用户多样化的应用需求。以需要开展电能质量分析的应用场景为例,设计了智能物联电能表用电能质量监测模组,并通过试验验证了扩展功能模组的功能及数据监测的准确性。

考虑能源消费的电炉生产企业可持续发展策略

电炉生产企业作为能源消费较高的行业,面临着日益增长的能源成本、环境污染压力和可持续发展的挑战。因此,提出考虑能源消费的电炉生产企业可持续发展策略。剖析能源消费对电炉生产企业可持续发展的影响,分析了近5年我国电炉生产企业的总体规模,总结了电炉生产企业中能源消费的关键要素配置作用,针对电炉生产企业可持续发展过程中存在的问题,从能源管理与节能、智能化与自动化技术应用以及清洁能源的应用三个方面入手,深入研究电炉生产企业在能源消费方面的可持续发展策略,有助于减少能源供求不平衡、缓解环境压力和保护生态系统。对于指导和推动企业实现更加高效、环保和可持续的能源消费具有重要意义。

“双碳”目标下新能源高质量发展路径研究

新能源高质量发展是我国实现“双碳”目标、推进能源革命、构建现代能源产业体系的必由之路,其内涵就是要立足能源安全与“双碳”目标,通过体制机制与技术创新,突破能源“不可能三角”。我国新能源产业经过多年积累发展,新能源装机容量、发电量全球领先,并建立了系统完善的产业链,但未来高质量发展仍面临多方面挑战。通过SWOT分析,我国新能源发展的“优势”主要集中在规模上,而“劣势”主要表现为供应稳定性不足、配套软硬件不完善,“机会”主要来自“双碳”目标下多方因素共同推动新能源发展,“威胁”则主要来自规模日益增长下的自我协调能力不足。我国新能源产业高质量发展应双管齐下,坚持供给侧改革与需求侧响应并进的发展道路。推进风光水火储协同发展,提高负荷侧分布式新能源项目及产业运行质量,在提升负荷侧电力用户需求响应能力的同时,进一步提升发电侧的余电消纳水平。同时要做好顶层设计与动态调整,优化新能源产业布局,持续优化分时电价政策,加大智能化技术研发与应用力度,建设全国统一电力大市场,进一步改革电价形成机制。

基于辐射能信号的火电厂直热式电炉温度控制方法研究

传统电炉温度控制方法存在控制稳定性较差、响应时间较慢等不足,影响了生产产品的质量,为此提出基于辐射能信号的火电厂直热式电炉温度控制方法研究。首先计算辐射能信号和炉内燃烧率,由此为基础,利用火焰彩色辐射图像处理技术获取的辐射能信息,对辐射能信号展开检测;其次以辐射能信号为中间变量,分析直热式电炉温度变化情况,获取温度变化状态;最后采用基于模糊免疫自适应算法的PID控制器,实现火电厂直热式电炉温度的有效控制。实验结果表明,所提方法在保障电炉温度控制稳定性的前提下,控制能力和抗干扰性能较好,具有较高的温度控制精度和效率。

小电渣锭表面质量的控制措施探讨

15t电渣炉经改造后,电气控制系统的升级以及电渣用渣的改变对整个重熔操作产生深远影响,基于新条件,对电渣锭的表面质量进行深入研究和攻关。对15t电渣炉的技术特性及表面质量进行简单介绍,总结小电渣锭表面质量的控制措施,旨在提高电渣锭的表面质量。该研究对于企业生产及开展相关研究具有一定的参考价值。

绿色能源愿景下的电动汽车质量检测与监控研究

随着全球能源转型和绿色能源愿景的提出,电动汽车作为清洁能源的重要载体,其发展日益受到关注。质量检测与监控作为保障电动汽车安全、性能及用户体验的关键环节,对于电动汽车市场的健康发展至关重要。本文首先概述了电动汽车的发展历程、工作原理及结构特点,并与传统燃油车进行了比较。接着,文章深入探讨了电动汽车质量检测的重要性、现有标准与方法,以及质量监控的现状与挑战。在此基础上,文章展望了电动汽车质量检测与监控的未来发展趋势,包括技术创新、政策与法规支持以及产业链协同等方面。期待在未来的发展中,能够看到更加完善的质量检测与监控体系、更加先进的技术手段以及更加严格的政策法规,共同推动电动汽车产业的绿色、可持续发展。

电子电器产品能效检测的质量控制技术研究

随着电子电器产品在现代社会的广泛应用,消费者对其性能和能效的要求日益提高。电子电器产品的能效检测和质量控制在产品质量可持续发展中占据了重要地位。探讨了电子电器产品能效检测和质量控制技术的方法和内容,旨在帮助制造商提高产品性能、减少能源浪费,同时确保产品质量和安全。

钠钙硅高白料玻璃全电熔炉工艺控制

钠钙硅高白料玻璃生产要求严格,全电熔技术是能够实现其稳定生产的保障,通过阐述全电熔炉技术在料方、出料量、加料、冷顶层及电流、计划性停电检修等多方面的控制要求,优化整体工艺细节,在保证全电熔炉稳定运行的条件下,实现了玻璃液质量大幅度提高,为全电熔技术的应用领域拓展提供参考。