高安全性电网在线运行数据自动监测系统设计

由于设备的限制,高安全性电网对过电压的监测精度较低,为减少过电压对电网的侵入,进行高安全性电网在线运行数据自动监测系统设计。设计监测系统整体架构,选择INSULAD2053型号数据采集卡,使数据采集频率最大化,实现在线运行数据的高精度采集。按照点、线、面3种电网基本消纳模式,通过灵活协调控制方式实现干扰电源的完整消纳。软件系统包括自动在线监测软件和离线分析软件,利用自动在线监测软件进行数据的采集与储存,实现连续数据流高效处理;通过离线分析软件对过电压数据进行进一步的离线分析。设计保护电路单元,选择压敏电阻作为导通电阻,保证高安全性电网在线运行数据自动监测系统的运行稳定性。实验结果显示,该系统对于过电压的监测效果好,监测覆盖率在95%以上,具有实用性。     

一种用DDZ-Ⅲ型仪表设计的燃油除盐处理装置

燃油中存在的盐离子（Na^ 、K^ ）严重影响燃气轮机的性能、寿命，而除盐是一个十分棘手的问题，文中提出卫种新的除盐方法及处理装置，较好地解决了这一实际问题。     

大型汽轮发电机组EH系统的典型故障分析及处理

根据华电能源哈尔滨第三发电厂大型汽轮发电机组EH系统的实际运行情况,针对高压抗燃油的油压波动、油质变差、油温升高、油动机摆动、油管振动、挂闸问题进行了典型故障分析并给出了处理方法,以保证大型汽轮发电机组的安全稳定运行。     

某抽水蓄能电站3F机组摆度偏大问题分析与处理

某抽水蓄能电站3F机组存在上、下导持续升高且超标现象,影响机组的安全稳定运行。本文对该问题进行现场检查及分析,对松动的磁极键进行打紧,并对存在的转子不平衡问题进行了动平衡配重试验,处理后机组的运行数据显示摆度和振动测值正常,机组恢复了稳定运行状态。     

绝缘油色谱在线监测装置减振隔振技术研究与应用

绝缘油色谱在线监测装置在电力行业应用广泛、规模庞大,其装置内安装了气泵、油泵等部件在工作时会产生强烈振动。持续振动会导致绝缘油色谱在线监测装置中振动噪音、部件损坏与输油管接口松动漏油故障,造成设备运行风险、环保等问题。本文介绍了绝缘油色谱在线监测装置减振隔振技术,通过应用和技术优化,取得良好的效果。为绝缘油色谱在线监测装置设计、制造和运行维护提供参考。     

柴油机规律性维护是延长正常运行时间和降低寿命周期成本的关键

现代船用柴油机具有更高的功率一重量比，其性能和燃油经济性比以往任何时候都好，排放也更低。通过趋势分析对柴油机维护计划进行优化，还可以实现最低的寿命周期成本、更长正常运行时间以及优秀的可靠性。以下是所有船用柴油机维护计划中的基本元素。     

汽轮机调节系统用抗燃油的研究动态及进展

介绍了汽轮机调节系统用抗燃油的研制、应用历史,比较系统地阐述了三芳基磷酸酯抗燃油的运行维护措施的研究动态及进展。     

进气处理装置对发动机性能影响的试验研究

一种装在发动机进气滤清器内的装置，对进气进行过滤处理。发动机采用处理后的进气，其综合性能可以得到显著改善。对一台具有16气门的四缸汽油机上应用结果表明，装了该装置后，发动机外特性上的燃油比油耗最多可以降低9％，同时其废气排放品质也有一定程度改善。对一台轿车进行的实车道路试验也表明具有同样的效果。加装该装置的前后对比，在同样的行驶距离、道路工况前提下，燃油消耗量减少2．94％。显示出该装置对减少燃油消耗以及降低汽车有害尾气排放具有良好的应用前景。     

电力变压器短路电抗在线测量方法研究

电力变压器的短路电抗是设计及运行过程中表征变压器本体抗短路电流冲击能力的重要参数。本文分析了基于电气量特征的短路电抗在线测量方法及对变压器运行状态进行实时监测的可行性,研究了基于变压器励磁电流补偿法和消去法的两种短路电抗在线测量方法的原理,推导了计算公式。动模实验在线测量结果与离线短路实验结果的比较表明了两种方法的正确性和有效性。     

火电厂在线化学仪表运行现状分析及维护研究

在火电厂日常生产过程中,在线化学仪表在运行过程中的准确性成为影响生产质量的关键.但是就目前而言,在线化学仪表在运行期间还存在一定的问题,文中通过详细分析火电厂在线化学仪表运行现状,对其中存在的问题进行分析;之后针对在线化学仪表的维护方案进行阐述,希望为实现火电厂平稳运行提供支持.     

汽轮发电机轴承箱及油挡渗漏油的处理措施

汽轮发电机的轴承箱及油挡渗漏油的缺陷是威胁电力工业安全生产的重大隐患之一,特别是老型高温高压机组,油挡多、热工引出线多等诸多因素易造成渗漏油现象,既影响了文明生产,又易于发生火灾事故(在汽轮机高温区更是危险),据统计汽轮发电机组的火灾绝大部分都是由于渗漏油引起。通过对渗漏油原因的分析,并结合本厂的处理措施作出进一步的探讨。     

抗燃油系统故障分析及处理

高压抗燃油系统是DEH系统的重要组成部分,抗燃油系统的油质受到污染、油压、油位不正常将影响到DEH系统的正常工作。分析了高压抗燃油被污染、油压、油位不正常的原因及消除方法。     

Health-aware frequency separation method for online energy management of fuel cell hybrid vehicle considering efficient urban utilization

Frequency separation methods (FSMs) are frequently used to implement energy management of fuel cell hybrid vehicle (FCHV), due to their flexible online implementation and resilience under diverse driving environments. However, predefined static rules of FSM generally result in inefficient operation of FCHV and rapid deterioration of sources. Additionally, allocated limits of storage devices are likely to be violated in the conventional FSM. With this inspiration, the paper proposes a novel health-aware FSM (HFSM) to appropriately distribute the traction power among energy sources of FCHV with efficient urban utilization. The power separation rules of HFSM are tuned in an instantaneous manner to concurrently realize the fuel economy, lifespan extension and allocated storage limits. Within HFSM, an online optimizer is formulated, which introduces the concept of soft/hard limitations and rationalized cost structure to adequately quantify the fuel consumption and health degradation of fuel cell. An adaptive droop adjustment is then integrated with HFSM to consistently realize the storage limitations. Compared to conventional FSM, considerable improvements in the fuel economy and fuel cell service life are observed over an extended iterative loop of standard urban driving cycles.     

超临界“W”火焰炉关键技术应用

针对燃用高硫高灰无烟煤超临界"W"火焰锅炉投产后暴露出来的燃烧稳定性差、锅炉受热面热偏差严重、NO_x排放浓度高、锅炉受热面结焦腐蚀、启动油耗偏大等影响机组安全稳定运行、高效清洁燃烧等问题,开展超临界"W"火焰锅炉设计优化、燃烧及制粉系统制造运行优化、锅炉热面在线监测技术研究、锅炉受热面防结焦防高温腐蚀技术材料研究、无烟煤节油点火技术开发等关键技术研究与应用,有效解决了超临界"W"火焰锅炉安全稳定、高效清洁燃烧的技术难题。     

汽轮机润滑油中颗粒数不合格的分析与处理

汽轮机润滑油系统的清洁度,直接影响到机组的安全运行。介绍了2011年沙洲电厂排查1号主机润滑油系统中5～15μm颗粒数超标的分析思路及消缺经验。润滑油中5～15μm颗粒数超标的主要原因是主油箱人孔门密封不好,周围空气中污染物侵入油箱造成颗粒数超标,经过严密封堵人孔门后油中5～15μm颗粒数指标已经合格。在经过调研比对后,参照目前国内大部分同类电厂主油箱负压维持在-0.3～-1.5kPa的技术规范,利用排油烟风机出口碟阀进行节流,将1号机主油箱负压由-4.1kPa逐渐调至-1.0kPa左右,机组运行至今安全、可靠,证实了该运行方案可行。     

Analysis of dc link oscillations in a hybrid fuel cell powertrain brought by in situ converter based electrochemical impedance spectroscopy

Electrochemical impedance spectroscopy (EIS) is a valuable tool for characterizing fuel cells. It was previously used for offline testing and only applied to single cells or short stacks with low-power equipment. Recently, there has been a trend on bringing it to high-power fuel cell stacks (FCSs) for in situ operation, especially in vehicular applications, with the required EIS ac perturbations generated by the power processing converter. However, the effects of adding such an extra function to a converter in the powertrain have not been investigated previously. Aiming at filling this gap, this paper focuses on the oscillations brought by the converter based EIS operation and their transfer in a typical hybrid fuel cell powertrain. The presented results indicate that it is favorable to operate EIS during motor is idling. The oscillation on the dc link reaches its maximum at the resonant frequency of the energy storage converter, while its magnitude is influenced by various factors, i.e., system parameters and operating conditions. Moreover, it is found that the worst-case condition of oscillation can be determined by a healthy stack at the beginning of its life.     

汽轮机抗燃油的运行管理和监督

大型汽轮机电液调节系统（ＥＨＣ）抗燃油的运行监督,在我国还是一项新而薄弱的工作。作者将工作中积累的经验加以系统总结,详细介绍了大型汽轮机电液调节系统抗燃油的运行监督和管理。     

失重法在线分析用小型灼烧炉设计技术与应用

在线监测对燃烧设备要求高,中高温加热用灼烧炉设计温度为800～1000℃,结合执行机构和控制装置,论述该小型在线式灼烧炉的设计原理及结构、电源控制方式,分析其主要功能和特点,通过实验和应用,可实现对可燃物在线精确燃烧,达到实时、准确反映即时燃烧工况,对有效控制燃料含量、提高热效率和节能起到重要作用。     

Studies on the effect of hydrogen induction on performance,emission and combustion behaviour of a WCO emulsion based dual fuel engine

This paper aims at studying the effect of hydrogen induction on engine performance, emission and combustion behaviour of a diesel engine fuelled with the emulsion of used palm oil (called as WCO-waste cooking oil) as pilot fuel and hydrogen as primary fuel. A single cylinder water-cooled direct injection diesel engine was tested at 100% and 40% loads. Results were compared with neat diesel, neat WCO and WCO emulsion at both loads in single fuel operation. WCO emulsion in single fuel mode indicated improvement in performance and reduction in all emissions as compared to neat WCO. Dual fuel operation with hydrogen induction further reduced the emissions of smoke HC and CO with WCO as pilot fuel at all power outputs. However, hydrogen induction resulted in reduced thermal efficiency at 40% load. WCO emulsion showed higher ignition delay as compared to neat WCO. Dual fuel operation with hydrogen induction increased the ignition delay further. Heat release pattern showed higher premixed combustion rate with hydrogen induction mainly at high power outputs. Premixed combustion rate became very high at higher rates of hydrogen admission mainly at high power output. In general, hydrogen induction showed superior performance at high power output and inferior performance at low power output with WCO emulsion as injected fuel.