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Analysis on Thermoelectric Decoupling Technology Paths for Thermal Power Units Under the Background of Deep Peak-Shaving [PDF]
New energy power generation has the characteristics of large fluctuation and instability in output and power generation load. In order to solve the above problems brought by new energy units on the internet, a variety of thermoelectric decoupling modes ...
CHEN Heng +4 more
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Low-Carbon Economic Scheduling of Integrated Energy System Considering Diversified Utilization of Hydrogen Energy [PDF]
ObjectivesIn the context of “dual-carbon” goals, achieving low-carbon economic operation of integrated energy system (IES) is of paramount importance. However, existing IES models incorporating power-to-gas (P2G) technology often overlook energy losses ...
LI Ji, MA Kai, YUAN Zhi
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The study of bidirectional DC-DC converter in the DC microgrid [PDF]
, 2016 作为新能源的有效利用方式之一的直流微电网没有无功功率的损耗，不需要跟踪频率和相位，可靠性和可控性有较大程度的提高，更适合分布式能源的接入和应用。双向DC-DC变换器承担着母线与储能之间能量双向流动的重要作用。同时，它还可以作为直流微电网之间的互联元件，具有十分重要的研究价值。 本文针对全桥拓扑结构的双向DC-DC变换器展开较为深入的研究。 首先，详细分析了在移相控制方式下，双向DC-DC变换器的在降压方向和升压方向的工作原理及零电压开关（ZVS，Zerovoltageswitching）的具体过程 ...
纪承承
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A Modified DOE-2 Model for Typical Performance of Absorption Chillers and its Application [PDF]
, 2007 LiBr-water absorption chillers are commonly adopted in multifunction energy systems. The empirical part-load performance model for chillers presented by DOE-2 is one of the analytical methods to solve chiller performances.
杨承, 杨泽亮, 蔡睿贤
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Gaoya dianqi, 2008 笔者介绍了用于高压直流电流测量的电子式直流电流互感器,针对其中决定测量结果的关键部分-分流器及一次联结导体,重点进行了热效应分析。理论分析得出:分流器自身和一次联结导体在直流大电流下都有热效应,而在高压直流线上谐波和阶跃响应产生的集肤效应还将导致不可忽视的附加热效应;一次联结导体的交、直流热效应共同作用将对分流器的测量产生影响。实验证明鼠笼结构的分流器可有效地抑制谐波电流的热效应,电子式直流电流互感器的热稳定性试验不宜用工频交流等效,只有采用实际直流才能真实可靠的反映其热稳定性能。
徐雁 +6 more
doaj
Failure analysis of four tube in power station boiler [PDF]
, 2015 火力发电厂是我国供电主体，约占总体发电量的70%。大型火电厂的安全事关电网的安全运行，而火电厂中的锅炉运行的可靠性是影响发电厂运行可靠性的首要因素，尤其是锅炉四小管的损坏泄漏对机组的安全运行影响最大，是火力发电厂的常见事故，一般占机组故障的60%-70%。锅炉经常由于四小管设计、制造、安装、运行、修理改造、管理等环节的问题以及长期在高温、高压、腐蚀、冲刷等恶劣条件下运行等原因而造成爆管并导致停炉。只有掌握四小管各种类型爆管的失效机理，才能有的放矢开展监督检验工作，寻找有效的管理和技术防治对策 ...
左仁红
core
Comparative Evaluation of Thermoelectric Decoupling Potential and Economy of Multi-Type Small Capacity Thermal Power Units [PDF]
ObjectivesNew energy power generation faces significant fluctuations and instability in output power and generation load, posing certain challenges to the stable operation of the power system. After thermoelectric decoupling, small-capacity thermal power
CHEN Heng +5 more
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Gaoya dianqi, 2009 750 kV并联电抗器是我国正在建设的西北地区750 kV骨干输电网络中不可缺少的关键设备,研制性能优良、安全可靠的750 kV电抗器产品意义重大。为此,国内变压器制造厂结合西北750 kV输变电工程要求,开展了750 kV并联电抗器绝缘结构、降低振动和噪声、防止局部过热等关键技术的研究。通过计算分析和试验研究,掌握了750 kV并联电抗器设计制造的关键技术,研制的750 kV并联电抗器局部放电量小于100 pC,振动小于60μm,噪声水平低于75 dB（A）,无局部过热 ...
宓传龙, 汪德华, 李银行, 陈荣
doaj
Development and Challenge of Flexible Operation Technology of Thermal Power Units Under New Power System [PDF]
Under the background of “dual carbon”, new energy sources have begun to be connected to the grid on a large scale. However, the randomness and volatility of new energy generation significantly impact the power grid, making it urgent to build a new power ...
LI Qi +5 more
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Gaoya dianqi, 2023 高压电缆长期运行过程中温度引起的绝缘材料热老化是影响其整体绝缘性能的重要因素。通过对高压电缆主绝缘层切片取样，研究分析了不同老化程度试样的微观形貌、官能团、结晶度、交联度等理化性能变化规律，测试分析了不同老化程度试样的电阻特性、介电性能和击穿特性，仿真模拟了不同温度下交联聚乙烯分子链的运动情况，进一步讨论了热老化对其微观结构的破坏演变机理。研究结果表明，老化2 160 h后试样的晶区结构破坏较为严重，随着老化时间的延长，相邻晶区的间距增大，晶区排列松散，无定型区面积增大；羰基指数从3.88%增大至11 ...
王兆琛 +6 more
doaj