水溶性聚酯绝缘浸渍漆的制备及性能研究

探讨了邻苯二甲酸酐与间苯二甲酸的用量比、己二酸的用量、最高反应温度、脱水措施、固化剂用量以及固化条件对水溶性聚酯绝缘浸渍漆性能的影响。结果表明:邻苯二甲酸酐、间苯二甲酸的摩尔比以1∶1为宜,己二酸占全部二元酸的比例为15%～20%时较为合适,最高反应温度应该控制在220℃;水性聚酯有机溶液与氨基树脂Cymel 325溶液的质量比应选为4∶1,固化温度和时间确定为150℃、2 h较为适宜;优化后的水溶性聚酯绝缘浸渍漆综合性能优异,可以满足中小型低压电机部件对电气绝缘性能的指标要求。     

聚酯型H级阻燃无溶剂浸渍漆性能的研究

采用加入自制烯基阻燃树脂组份的新方法,合成了一种新型的 H级阻燃无溶剂浸渍漆.研究了烯基阻燃树脂用量对绝缘漆综合性能,特别是阻燃性能的影响.分析比较了不同合成方法对产品粘温、耐热、电气等性能的影响.结果表明：该新型 H级阻燃无溶剂浸渍漆具有阻燃性能好、电气绝缘性能佳、低温快固化的特点;当阻燃组份用量为不饱和聚酯量 45%时综合性能最佳（氧指数为 38）.     

阻燃型丙烯酸聚氨酯绝缘涂料的研制

以环氧改性丙烯酸树脂为基料,氯化石蜡和Sb2O3为阻燃改性剂,制得了阻燃型丙烯酸聚氨酯绝缘涂料。研究了不同丙烯酸树脂、氯化石蜡及协同剂Sb2O3用量对涂料电气性能、阻燃性能和漆膜硬度、光泽度的影响。结果表明,用环氧改性丙烯酸树脂制成的涂料具有较好的阻燃性能和电气绝缘性能,其体积电阻率为9.6×1015Ω·m,电气强度达32MV/m。当氯化石蜡用量为8%,在3%的Sb2O3协同作用下,可将聚氨酯涂料的极限氧指数(LOI)从18提高到31,同时能保证聚氨酯涂料优良的物理机械性能。     

锌粉形貌对碱性锌锰电池性能的影响

研究了 3种颗粒形貌不同而成分相同的锌粉在碱液中的稳定性 ,并检测用这 3种锌粉制作的LR6型无汞碱锰电池性能。锌粉的析气试验表明针状锌粉在碱液中浸泡 3天后析气量最低 ;以针状锌粉膏制成的电池大电流放电容量可提高约 30 % ;电池有很好的抗震性、贮存性。     

阻燃防鼠型90℃PVC电缆护套料配方研究

本文分析了电缆用阻燃防鼠型90℃ PVC护套料防鼠性能及阻燃性能分别与防鼠剂用量及阻燃剂用量的关系．阻燃防鼠PVC护套料物理机械性能及电气性能与树脂、增塑剂、稳定剂、抗氧剂、填充剂等添加剂之间的关系．介绍了阻燃防鼠90℃ PVC护套料配方的研制过程及配方性能。     

阻燃防鼠型90°CPVC电缆护套料配方研究

本文分析了电缆用阻燃防鼠型90°CPVC护套料防鼠性能及阻燃性能分别与防鼠剂用量及阻燃剂用量的关系,阻燃防鼠PVC护套料物理机械性能及电气性能与树脂、增塑剂、稳定剂、抗氧剂、填充剂等添加剂之间的关系,介绍了阻燃防鼠90°CPVC护套料配方的研制过程及配方性能。     

AgMeO触点材料成分与组织的优化设计理论

全面介绍了燃弧电接触的失效模式及机理,详细分析了触点对电弧热力作用的响应机制,提出了影响AgMeO触点材料电气使用性能的成分、组织结构因素及其机理,根据影响触点材料电气使用性能的可表征的材料理化性能、成分、组织因素,建立了AgMeO触点材料成分与组织的优化设计原则。提出了AgMeO触点材料标准的修改建议。     

循环水清洗铅酸蓄电池正极板的工艺与性能

对自动循环水洗铅酸蓄电池正极板的工艺进行了探讨和确定,由此得到正极板的首次放电性能与质量有所提高,特别是干荷电性能经过不同的贮存时间(1!45d)没有出现下降现象,8倍率放电性能良好。弱碱性水清洗正极板,不影响电池的首次放电性能。线性电位扫描和X射线衍射分析(XRD)的结果解释了自动循环水洗的正极板在贮存期间干荷电性能不下降的原因。正负极板可同时实现自动循环水洗,从而实现清洁生产。     

聚酯型绝缘浸渍树脂耐齿轮箱油的性能研究

对比分析了4种聚酯型绝缘浸渍树脂综合性能,通过耐高温齿轮箱油试验考察了绝缘浸渍树脂在齿轮箱油中的性能变化。结果表明:聚酯型绝缘浸渍树脂经耐高温齿轮箱油试验后的性能变化与绝缘浸渍树脂的类型、稀释剂体系以及耐受时间密切相关,以特种丙烯酸酯为稀释剂的亚胺改性聚酯浸渍树脂在齿轮箱油中热老化后其电气性能和力学性能保持良好,呈现较为优异的耐油性能;在热老化过程中齿轮箱油的性能和成分保持不变,仅起到媒介作用。     

防鼠型PVC护套料配方研究

本文分析了防鼠 PVC护套料防鼠性能与防鼠剂用量的关系 ,防鼠 PVC护套料物理机械性能及电气性能与树脂、增塑剂、稳定剂、抗氧剂、填充剂等添加剂之间的关系 ,介绍了防鼠 PVC护套料配方的研制过程及配方的性能     

加氢变压器油理化性能的老化研究

在巴德老化条件下,研究加氢变压器油在老化过程中的C族组成变化及油质的老化对运动粘度等理化性能的影响,探讨理化性能与C族组成变化的关系。结果表明:在巴德老化条件下,加氢变压器油的环烷烃组分、界面张力、运动粘度及介质损耗因数出现拐点的时间一致,加氢变压器油的理化性能和电气性能参数之间相互关联,与变压器油的C族组成存在密切的关系。     

微氧作用下天然酯变压器油热老化特性研究

天然酯变压器油因不饱和脂肪酸含量较高而易氧化,而变压器因储油罐与空气作用或密封设备产生泄漏等原因,会导致油中溶解微量的氧气.基于此,文章研究了微氧作用下天然酯变压器油的热老化特性,并分析了不同老化时间下油样的电气性能、油色谱特性以及两者之间的皮尔逊相关系数.结果 表明:适时微氧作用能在一定程度上延缓天然酯变压器油电气性能的降低;天然酯变压器油纸绝缘热老化的特征气体为CO2和C2 H6;天然酯变压器油的电气性能与油色谱中CO2-C2H6(油样中溶解的CO2与C2H6的百分比之差)之间存在强相关性.     

油中糠醛浓度判定变压器固体绝缘劣化程度的研究

变压器油的炼制由原来的酸碱精制发展到糠醛溶剂精制,水洗过程无法完全除去糠醛溶剂,因此,新的变压器油含有一定量的糠醛,使得现行的采用油中糠醛含量判断变压器固体绝缘劣化程度的规定不适用。文章提出了采用糠醛试验判断变压器固体绝缘劣化程度的修正方法。     

The behavior of different transformer oils relating to the generation of fault gases after electrical flashovers

Dissolved gas analysis is a common technique in the supervision and maintenance of transformers. It can give hints on defects and faults in oil-immersed transformers by determination and quantification of gases arising in consequence of thermal or electrical stress. Different algorithms for the assessment of transformers, which employ data obtained from dissolved gas analysis, have been published so far. However, only few investigations, dealing with the influence of the oil’s composition towards the oil’s tendency of releasing gases, exist. This research study presents a comparison of three commercially available transformer oils of different composition regarding that aspect. The results indicate that an oil with high percentages of paraffinic hydrocarbons forms gases to a lesser extent than naphthenic oils when it is exposed to electrical stress. This phenomenon can be explained either by a variable solubility of gases in the medium oil, or by the presumption that cyclic hydrocarbons are the main producers of gases.     

State of water in hydrocarbon liquids and its effect onconductivity [transformer oil]

The humidity or the dissolved water in insulating oils influences conduction and breakdown phenomena. The corrections between the amount of dissolved water and the electrical properties have been investigated. However, the effect of water has been based only on the total amount of water because in the past there was no way to observe the state of water in oil in an electrical field. With the availability of Fourier transform infrared (FTIR) spectroscopy to characterize water clusters, the effect of water in transformer oil can be reassessed based not only on the amount of water, but also on the state of water. In this paper, IR spectra of water in several liquid hydrocarbons and conduction current were measured at the same time. The selection of the liquid hydrocarbons was made on the basis of the degree of polarizability of the liquids. Because the water molecules combine with the polar structures by hydrogen bonding, the state of water depends on the polarizability of the oil. As a result, there is a difference in conduction phenomena depending on whether water is free or combined with the polar structure of the liquid     

1 000 MW超超临界汽轮机润滑油系统优化研究

汽轮机组不设置独立主油泵且电气接线方式薄弱,导致事故情况下润滑油系统对直流油泵的依赖性更强。一旦发生异常事件,直流油泵不能及时正确地启动,将直接导致汽轮机组断轴烧瓦的重大设备损坏事故。通过油泵的启动试验对比分析,完成润滑油的电气及联锁控制回路改造,解决了直流油泵启动中存在的隐患,降低了润滑油系统导致断轴烧瓦事故发生的可能性,对同类型机组起到一定的参考作用。     

国产加氢型超高压变压器油与几种进口超高压油的老化试验情况

对克拉玛依加氢型超高压变压器油、几种国外超高压用油及混合油的老化试验情况进行了对比分析，试验证明：国产加氢型超高压变压器油的性能指标能满足超高压充油电气设备的需要，但品质尚属中等，在酸值、颜色及抗氧化性方面还有待进一步改善；国产油可与国外油混合使用。     

变压器油色谱在线监测系统不同技术特点探讨

从原理、结构及特点，包括油气分离技术、气体组分分离度、检测器等方面，对不同原理的检测产品进行比较分析，对全省使用的在线产品进行统计，明确存在的问题和努力方向。     

Influence of oil aging on the space charge dynamics of oil‐immersed paper insulation under a DC electric field

The formation of space charge in oil/paper insulation system can lead to material degradation in the region of high electric field. Therefore, it is important to understand the factors that affect space charge formation in oil/paper insulation system. In this paper, the effect of oil aging on space charge dynamics in oil/paper insulation system is investigated using the pulsed electroacoustic (PEA) technique under a DC electric field at room temperature. The ultraviolet/visible (UV/vis) spectrum of the oil shifts to longer wavelengths, and the oil acidity increases as the aging time increases. It has been found that the oil property has a significant effect on the space charge distribution in the oil/paper insulation sample. The more the deterioration of the oil, the larger amount of negative and positive charges accumulated in the bulk of the oil/paper insulation sample. The total amount of slow moving charges, the surface trap energy density, and the electric field distortion of the oil/paper insulation sample increased with the degree of deterioration due to oil aging. © 2014 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.     

金属波纹式储油柜油温油位曲线绘制方法研究

油温油位曲线是变压器的关键参数之一,对于准确判断变压器油位是否在安全范围内具有重要作用。首先简要介绍金属波纹式储油柜的结构及原理,并根据其结构特点详细推导了该种型式储油柜油温油位曲线的绘制方法,最后利用2台110 kV变压器的温升试验验证了理论推导所得曲线绘制方法的可行性。研究结果表明,理论推导所得油温油位曲线与实际曲线误差小,准确性高,曲线绘制方法具有现场应用价值。