The Design and Application of Intelligent Power Supply System of Integrated Meteorological Business at the County Level

The system uses Japanese Mitsubishi PLC as the main control core,and intermediate relay is used for signal acquisition and conversion.The system is mainly composed of data processing module,municipal electricity monitoring module,wireless communication module,remote controller,speech recognition module,display module,sensor,switching output module and UPS power supply. The system can automatically start generator for power supply when municipal electricity is failure; when municipal electricity returns to normal,it automatically restores the power supply function of municipal electricity. In order to improve the stability of the system,the system has the functions of fault alarm,remote reset and remote query,etc.,which can realize seamless switching of municipal electricity and generator. It effectively avoids meteorological data loss,data delay,network interruption,etc. caused by unstable municipal electricity,solves the power supply problem of grass-roots meteorological station,especially at night,provides stable power supply for the integrated meteorological observation,forecasting,and early warning service.

The Way to Relieve Tense Supply Situation of Power and Coal in China

This paper introduces the situation of coal and power production, the tense supply of powercoal and deteriorated coal quality in 2004, analyzes the causes of tense supply of power and coal, one ofwhich is due to the government regulated power tariff against rapid escalation of coal price that powerenterprises can hardly afford. It also presents some policy proposals to relieve the contradiction betweencoal and power, including to intensify macroscopic regulation between industries and regions, solve theproblem of power coal transportation and reduction or exemption of tax on coal industry and circulationlinks, through secondary distribution to regulate profit difference among industries.

Business Operation of Coal Supply and Electric Power Enterprises

In recent years, the prices of primary energy especially coal continue to increase rapidly. This results in a substantial decline of profits and more operating difficulties in the downstream electric enterprises. The listed companies in both coal supply and power industries have quality assets and are the representatives of these industries. Through the analysis of the financial and operational status of the listed coal supply and power companies since 2007, the reasons for the business development difficulties in the electric power industry were discussed. Recommendations were provided including improving the coal pricing system, increasing the degree of business integration of the coal and electric power industries, and adjusting energy structure.

Application of Distributed Intelligent Power Supply Technology in Expressway Tunnels

With the coordinated development of today's social economy with science and technology,various advanced technologies are being used in highway engineering,especially the distributed intelligent power supply technology in expressway tunnels,which has a very significant advantage.In order to realize the effective application of this technology and promote the power supply effect in expressway tunnel,this study analyzes the advantages of this technology and its application in expressway tunnel,hoping to provide scientific reference for the application of distributed intelligent power supply technology and the engineering development of expressway tunnels.

Supply Chain Cooperation between Coal Enterprise and Electric Power Enterprise in China

Based on the two-stage Stackelberg game method, value creation of supply chain cooperation between coal enterprise and power utilities is studied by formulating profit functions of coal and power enterprises and calculating the maximum profit. According to the analysis, it is found that the profit from supply chain cooperation between coal and power enterprises is more than that of non- cooperation. The cooperation is validated to be beneficial for both units; however, the profit is mainly taken by the power enterprise. Thus, it is necessary to set up the incentive mechanism to distribute cooperation value between coal and power enterprises to promote their continual cooperation.

Performance Analysis of Induced Draft Fan Driven by Steam Turbine for 1000 MW Power Units

Boiler fan is the main power consumption device in thermal power units and the induced draft fan accounted for the largest proportion. Reducing the energy consumption rate of induced draft fan is the main path to reduce the power consumption rate of thermal power units. The induce fan driven by small turbine is greatly effective for reducing the power consumption rate and the supply coal consumption rate in large thermal power plant. Take 1000 MW power units for example, the selection of steam source for steam turbine were discussed and economic performance of the unit under different steam source was compared in this paper. The result shows that compared with the motor driven method, there is about 1.6 g/kWh decrease in supply coal consumption rate driven by the fourth stage extraction steam;whereas there is about 2.5 g/kWh decrease in supply coal consumption rate driven by the fifth stage extraction steam.

Advanced Strategies to Mobilize Crop Residue to Replace Coal in India

Various published data show the amount of crop residue available annually in India may range from a low of 90 to a high of 180 million tonnes. Different types of crop residue are collected from farmers depending on the geography and crop pattern for instance, in north India rice straw and cotton stalks are collected while in central India soya husk and sugarcane tops are collected. Baling and transporting straw from the field, though appear to be an option for safe disposal, will be feasible only when alternate, effective and economically viable usage methods are identified and facilities and infrastructure for ex-situ management methods are created. One immediate short term use of the residue is to replace 5% - 7% of the 670 million tonnes of coal India currently consumes to generate power. The farmers will benefit from the sale of their excess crop residue. The scheme will reduce pollution due to residue burning practices. Replacing coal will cut the GHG emissions. The challenge is to mobilize the crop residue collection and timely delivery to power plants. The data and calculations in this monogram show that it is economical for the farmer to remove the crop residue from the field quickly by using modern balers, to pelletize the biomass in small-scale distributed pellet plants, to store pellets in the modern steel bins and finally to deliver the pellets to coal plants by using rail transport. The delivered cost is estimated at around Rp 6.78/kg. The Government of India encourages the power plants to pay at least Rp 10/kg for the delivered biomass in the form of pellets. The current monogram analyzes the organization of an efficient supply chain in the State of Haryana India to ensure a sustainable modern enterprise.

牵引供电数字孪生系统框架设计及典型应用

数字孪生是一种将物理实体与数字模型深度融合的新兴产业技术,受到国内外铁路行业广泛关注。基于数字孪生的概念和发展现状,提出牵引供电数字孪生系统的框架设计和关键技术需求。针对基于数字孪生的牵引变压器状态监测及性能预测、牵引开关柜温度监测、系统故障检测与处理等典型应用,探讨数字孪生技术在铁路牵引供电系统领域的应用前景。结果表明,通过数字孪生技术的应用,可实现对设备运行状态的全面监测和优化,提升牵引供电系统的性能及可靠性。

煤流-潮流协同的矿山供电系统低碳优化运行

双碳目标的提出对我国矿山绿色高效开采提出了更高的需求。为此,该文提出煤流-潮流协同的矿山供电系统优化调度方法。首先,基于煤流在采煤工作面、带式运输机、储煤筒仓等环节的连续性特征,抽象出运输煤流和节点功率耦合的运输设备模型;其次,整合煤流运输安全约束与配网潮流约束,建立煤流-潮流协同的运行优化模型;最后,以矿山用能的经济性和碳减排为目标,考虑主网实时碳计量水平,调节采煤时间、煤流速度、运输流量与设备用能,生成煤流运输和矿山电网低碳调度的优化方案。以山西某矿山供电系统为实例,验证所提模型与方法的有效性。仿真结果表明,所提模型与方法能够有效降低矿山生产的吨煤电耗、用能成本及碳排放量,实现了煤流-潮流协同的矿山低碳化经济运行。

城市轨道交通供电设备智能运维管控系统开发与应用研究

本文就城市轨道交通供电设备智能运维管控系统的开发与应用进行了全面系统的探讨,旨在通过实证分析验证系统的应用效果和实际效益,以期为城市轨道交通供电系统的智能化管理提供理论依据和实践指导。

智能功率模块驱动的反激式开关电源优化设计

为了实现智能功率模块(IPM)驱动电源的高效化与低成本化,利用反激式变压器的特点,设计了一款应用于IPM驱动的隔离型多路输出反激式开关电源,对控制芯片供电电路转换时电压进行稳定性优化。仿真及实验结果表明,优化后控制芯片供电波形稳定,反激式开关电源输出在5 ms时达到稳定,误差小于2%,波纹系数小于2%。

高速铁路牵引变电所智能化建设方案研究

智能牵引变电所是智能牵引供电系统的核心,由智能化一次系统、广域保护测控系统和智能辅助系统构成。为提高目前在建高铁牵引供电系统智能化水平,探讨并提出了针对其牵引变电所的智能化改造方案。

基于PROFIBUS DP的煤矿电厂供煤自动化系统设计

针对煤矿电厂供煤系统中生产效率低等现状,设计了基于PROFIBUS DP总线的煤矿电厂供煤自动化系统。介绍了该供煤自动化系统的特点,着重论述了系统的硬件结构、软件设计及通讯设置。现场运行表明,Profibus DP现场总线能够将供煤系统中分散的设备进行集中管理,通讯稳定且数据传输率高,较大地提高了生产效率,改善了工人的工作环境。

基于人工智能的供配电系统故障诊断与恢复策略

本文研究了基于人工智能的供配电系统的故障诊断与恢复策略。首先,对智能供配电系统的基本架构和原理进行深入探讨,包括网络感知、数据采集、实时监控和故障检测等方面,揭示了其核心组成部分的协同作用。其次,对机器学习在供配电系统故障诊断中的应用进行研究,阐述了机器学习在识别异常情况、分类故障类型和提供决策支持方面的关键作用,强调了其在优化系统性能和减少停电影响方面的巨大潜力。探讨了深度学习技术在供配电系统故障诊断中的应用,包括声音和图像分析,论述了如何利用深度学习技术处理大规模数据集,以提前发现潜在问题,从而更加全面地保障电力系统的稳定运行。最后,研究了恢复策略和自愈系统,探讨了如何在故障发生后自动触发恢复策略,以最小化停电时间和降低经济损失。强调了自动化切换设备和远程控制的重要性,以实现电力系统的快速、有效的自愈。

能源强国目标下煤炭安全保供及高效降碳效力研究

煤炭安全保供及高效降碳效力研究可为能源强国目标下煤炭领域发展规划提供有力的决策支撑。本文从安全保供和高效降碳两个角度入手,研究了煤炭在能源强国目标下继续保持主体能源地位的潜力、能力和实力,着重通过构建煤炭安全保供的系统动力学模型预测了煤炭安全保供的效力,分析了2060年前煤炭领域的降碳效力。研究结果表明:我国煤炭的可采储量和资源分布是安全保供的基本保障,结合近20年煤炭供应和消费关系可知,我国煤炭资源具备稳定、安全、坚实的保供能力;未来煤炭的安全保供效力在波动中逐渐趋向于动态的柔性平衡;传统煤炭能源向煤基能源过渡效力是构建能源强国目标下新型能源体系的重要环节。我国煤炭领域在清洁转化与利用中体现出显著的降碳潜力,未来随着煤炭地下气化和富油煤开发利用等技术的发展应用将展现出较强的降碳效力,至2060年总体的降碳效力约为1×10^(9)t。

不同权力结构下汽车供应链定价与智能水平决策

辅助(自动)驾驶软件和芯片、传感器等智能硬件赋予汽车智能水平,软件提供商因此成为了车企的重要供应商并打破车企主导供应链的传统。基于大部分车企生产软硬件智能水平匹配型汽车的现实情形,确定汽车的最优智能水平与价格,对由软件提供商和智能车企组成的汽车供应链进行研究。构建并比较了智能车企主导和软件提供商主导情形下的Stackelberg博弈模型,分析了汽车智能水平敏感度、智能硬件成本投入效率等对决策的影响。研究发现:①权利结构变化不会改变汽车的最优智能水平;②在市场初期,智能车企主导供应链有利于扩大市场规模和提高供应链系统利润,软件提供商主导供应链有利于提高汽车智能水平和降低整车价格;③软件提供商在市场初期与智能硬件投入效率低的智能车企合作可以避免利润损失,而在市场后期与硬件成本投入效率高的智能车企合作获利更多。

基于PROFINET的井下保护与监控一体化系统设计

针对现有保护系统无法可靠实现煤矿井下高压供电线路短路保护的选择性,提出了一种基于实时以太网PROFINET的井下高压供电系统保护与监控一体化系统。系统主要由PROFINET网络、监视器、控制器及具有PROFINET IO接口的综保器构成,可实现保护与电力监控网络的融合,完成短路保护的选择性,同时具有电力监控功能,能够迅速确定故障点位置,缩短故障排查时间,提高供电网的安全性与可靠性。仿真结果表明,PROFINET实时性满足保护要求,系统能够可靠实现井下短路保护的选择性及电力监控功能。

煤矿供电系统防越级跳闸技术及其应用

随着煤矿生产过程中的电力需求不断增长,煤矿供电系统的安全运行成为了研究重点。首先,论述了防越级跳闸技术在煤矿供电系统中的重要性。然后,对防越级跳闸技术的实现方法进行了详细分析。接着,提出了一种基于智能电网技术的防越级跳闸方案,并通过实际煤矿供电系统的仿真实验验证了其有效性。

智算时代一体化电源应用分析

AI算力需求的爆发给智算数据中心系统建设带来高功率、散热难、转型困难等挑战。探讨了一体化电源系统的技术革新及其在提升智算中心使用效率、建设效率、运行可靠性与安全性方面发挥的作用。提出了一体化电源解决方案,并结合实际案例分析,证明该方案在系统集成性、稳定性、可靠保护机制以及对数据中心整体安全策略方面具有显著的优势,其智能化管理平台支持实时监测、数据分析与决策,对于预防潜在风险、提高应急响应速度具有重要意义。

煤矿供电系统节能降耗技术研究

分析了煤矿供电系统中储能技术和智能控制技术的应用,通过对煤矿供电系统节能降耗优化方案的研究,提出了供电系统智能化建设。基于煤矿供电系统的实际情况,考虑供电系统的各种因素,对智能化供电系统的适用性进行了评估,并进一步提出了供电系统节能降耗的优化措施,以提高供电系统的实用性和效率。