共查询到20条相似文献,搜索用时 140 毫秒
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利用冰水来增加燃机功率Rokeby电站的GTllNI燃气轮机将采用进气冷却来增加功率。冰水来自现有的热能贮存设备,在炎热的夏季将用来增加透平的功率。Lincoln电气系统(LES)率先应用了该项技术,它于1991年在北美安装了热能贮冰设备和转换系统(... 相似文献
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烟气脱硫(FGD)电气系统的主接线方式及系统构成特点,阐述了FGD电气系统的接地技术,分析了事故保安负荷在FGD电气系统中的作用,提出了设计中应注意的事项。 相似文献
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为尽量减小雷击对重要负荷的供电影响,分析了储能电站二次设备遭受雷击的危害,研究了防雷设计中的内部星状隔离连接法、内部网状隔离连接法和内外网状多点连接法三种等电位连接方式,对三种连接方式在雷电侵袭时的设备电位差的计算和分析结果表明,内部星状隔离连接法中设备间电位差最大,内外网状多点连接法中设备对地及设备间电位差均最小,有效减小了雷击对二次设备及负荷的影响,可实现储能电站的有效防雷,仿真分析验证了结果的准确性。 相似文献
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浅谈大型光伏并网电站的运行与维护 总被引:1,自引:0,他引:1
根据宁夏太阳山大型光伏并网电站的运行实践经验,阐述了光伏电站技术文件管理体系和设备运行、维修管理程序;详细介绍了电站日常运行管理制度和主要设备——光伏阵列和逆变器的管理、检修工作方法;为光伏电站设备的安全、稳定、经济运行提供可借鉴的技术保障。文章还提出了应用设备状态检修先进技术,逐步实现电站的无人值守和安全运行的建议。 相似文献
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摘要: 研究了继电保护及相关回路动态监控及故障诊断系统架构,提出了基于该架构的状态采集单元、站端动态监控技术、二次回路故障诊断技术以及过程层和间隔层设备改造。基于该架构的成套系统已经在安徽某变电站成功投入运行。基于该架构的成套系统在安徽某500 kV变电站成功投入运行。运行结果表明,系统稳定可靠,数据记录完整。记录的数据有助于现场设备运行工况的分析。 相似文献
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现今工业产品生产成本构成很多,其中用电成本是绝对不可忽视的,由于工厂供电系统中的用电设备运行时会产生大量无功功率损耗,因此,从工厂供电系统中无功消耗的种类出发,减少设备投资,降低企业用电成本成为大家所共同关注的。文章主要从厂用电的节能设计、节能设备应用、厂用电管理等方面进行阐述,目的是降低厂用电量。 相似文献
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简要介绍大亚湾核电站调试锅炉工程配电系统一次及二次接线的设计、电气设备选择及其布置。经过调试运行证明,该系统满足了调试锅炉的要求,并已顺利完成了核电站1号主汽轮发电机组及其辅机在各种工况下的试运行试验。 相似文献
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Optimum design of transmissions systems for offshore wind farms including decision making under risk
The power transmission system of an offshore wind farm constitutes the infrastructure that allows the electricity produced by the power plant to be injected into the onshore power transmission network. The design of this transmission system depends on numerous factors: the rated power of the wind farm, wind conditions at the location, the distance from the shore, the cost of electrical equipment, the price of energy, the maintenance costs, the failure rate of the equipment, and so forth. At the design stage, most of these factors remain defined with a degree of uncertainty that, in many cases, may lead to major deviations (risk) with respect to the planned economic performance of the facility. The objective for the project team of the transmission system is the determination of the most suitable configuration of the evacuation infrastructure by selecting the technology, either HVAC or HVDC, and by sizing the electrical equipment: the cables, substations or converter stations, compensation units, among other pieces. To this end, the approach developed in this work includes the assessment of a broad range of feasible scenarios (probabilistic approach) and then the selection of the optimal configuration based on a method of decision-making, taking into account the main technical and economic aspects of the infrastructure. 相似文献
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煤矿35 kV供电系统正常运行过程中,每小时都要记录电气设备运行状态、线路电压、电流、功率等参数。当供电系统发生故障时,系统中电流和电压参数会有变化。要求值班人员除了能及时迅速做出判断外,还必须正确选择合理的供电参数,加强对电气设备的维护。随着微机技术应用的迅速发展,采用微机适时监测监控,以确保电气设备的安全运行。对煤矿35 kV变电站微机监测监控与保护回路进行了探讨。 相似文献
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核电站接地和防雷系统对核电站的安全运行起着十分重要的作用,也直接关系到厂内工作人员的人身安全和各种电气设备的安全与正常运行.核电站接地主要应用铜电缆作为接地材料,铜缆与铜缆或其他接地部件之间的连接全部采用放热焊接.参考放热焊接原理,结合施工过程中出现的虚焊、脱焊、接地盘施工不平整等质量问题,从质量管理"人、机、料、法、环"五要素的角度,对接地施工全过程产生问题的根本原因进行分析;按照质量问题分析结果,针对不同类型的问题,采取相应的技术改进措施后,质量问题大幅减少.技术改进措施取得了良好效果,并在核电项目建设中取得了显著的经济效益. 相似文献
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Alagarsamy KRISHNAVEL Dusmata Kumar MOHANTA M. Jaya Bharata REDDY 《Frontiers in Energy》2013,7(3):288
With the prevailing power scenario, every watt-second of electrical energy has its own merit in satisfying the consumer demand. At the state of such a stringent energy demanding era, failure of a power generation equipment compounds the energy constraints which will not only result in a huge loss of generation but also have an impact on capital revenue. The unexpected failure of generator step-up (GSU) transformer is especially a major disturbance in the power system operation and leads to unscheduled outages with power delivery problems. The time lag in bringing back the equipment in service after rectification or replacement may increase the criticality as the process involves mobilization of spares and maintenance professionals. Hot atmosphere existing in the vicinity of thermal power stations running round-the-clock with more than 100% plant load factor (PLF) increases the thermal stress of the electrical insulation which leads to premature failure of windings, bushings, core laminations, etc. The healthy state of the GSU transformer has to be ensured to minimize the loss of power generation. As the predication related to failure of a GSU transformer is associated with some uncertainties, a fuzzy approach is employed in this paper along with actual field data and case studies for the well-being analysis of GSU transformer. 相似文献
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Kueck J.D. Attarian G.E. Leake H.C. Sims T.R. 《Energy Conversion, IEEE Transaction on》2001,16(4):374-379
Nuclear generating stations utilize degraded voltage relaying schemes to protect electrical equipment against sustained low voltage conditions. Based on regulatory guidance, typical design involves the use of undervoltage relays which, when actuated, automatically disconnect the safety buses from the degraded offsite power supply and initiate reconnection to an alternate supply such as the diesel-generator. This automatic disconnection creates the risk of an unwanted separation from the offsite power supply. Although the industry recognizes the importance of ensuring that adequate voltage is supplied to critical plant equipment, the method of achieving this goal is a matter of ongoing discussion. The potential benefits of degraded voltage relaying schemes do not necessarily outweigh the additional risks that they create, and other measures not explicitly described in the regulations, including detailed analyzes of the transmission grid and onsite distribution system, and procedural controls, are essential elements of a reliable offsite power supply 相似文献
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首先根据2005年至2009年一次死亡超过10人的重特大瓦斯爆炸事故火源,分析出电气事故是频率最高事故来源。其次从供电电源和电气设备的缺陷等方面分析了常见电气事故发生的原因。最后从电气设备的正确使用、供电系统的安全性要求、电源的安全性要求3个方面,分析了煤矿电气安全的相关技术研究。 相似文献