Based on the molecular design principle camphene derivatives - modified epoxy macromer withhigh UV absorption coefficients and low ionization Potentials were designed, synthesized and character-ized. UV copolymerizati...Based on the molecular design principle camphene derivatives - modified epoxy macromer withhigh UV absorption coefficients and low ionization Potentials were designed, synthesized and character-ized. UV copolymerization of macromer were carried out by the use of ethoxy benzoin and sulfoniumcomples|BDS (2PF6 )2-| under the designed conditions. Characterization of polymrization reactionand polmperized products have been done by means of IR, DSC, UV, microscope and poarizing microscopy, transmitancy and surface property measurment, as well as systematically determination ofpolmperization rate and shrinkage. The results have shown that the above - described macromers withoptimal proportion combination can efficiently absorb the light enefgy within 250 run to 365 nm andprovide not only high rate and low shrinknge of polymerization, but also good optical, wetting, adhesionand other physico - chemical properties without any oxygen inhibition innuence which can metthe spe-cial requirments of optical compo8ites for manufacturing of Multiplical Spherical Equation belensComplex.展开更多
电网换相换流器型高压直流输电(line-commutatedconverter based high voltage direct current,LCC-HVDC)系统存在换相失败风险,给电网的安全稳定运行带来威胁。首先分析了传统直流输电系统换相失败的机理;然后从控制保护、增加额外设...电网换相换流器型高压直流输电(line-commutatedconverter based high voltage direct current,LCC-HVDC)系统存在换相失败风险,给电网的安全稳定运行带来威胁。首先分析了传统直流输电系统换相失败的机理;然后从控制保护、增加额外设备及换流器拓扑改造三个方面,综述了目前传统直流输电系统换相失败的抑制方法;最后,面对当今新能源电力系统中交直流混联错综复杂的特征,从换相失败的准确数学模型、复杂耦合机理、快速预测判断指标及新型抑制手段等方面,指出未来在换相失败抑制方面值得深入探索挖掘的研究方向。展开更多
文摘Based on the molecular design principle camphene derivatives - modified epoxy macromer withhigh UV absorption coefficients and low ionization Potentials were designed, synthesized and character-ized. UV copolymerization of macromer were carried out by the use of ethoxy benzoin and sulfoniumcomples|BDS (2PF6 )2-| under the designed conditions. Characterization of polymrization reactionand polmperized products have been done by means of IR, DSC, UV, microscope and poarizing microscopy, transmitancy and surface property measurment, as well as systematically determination ofpolmperization rate and shrinkage. The results have shown that the above - described macromers withoptimal proportion combination can efficiently absorb the light enefgy within 250 run to 365 nm andprovide not only high rate and low shrinknge of polymerization, but also good optical, wetting, adhesionand other physico - chemical properties without any oxygen inhibition innuence which can metthe spe-cial requirments of optical compo8ites for manufacturing of Multiplical Spherical Equation belensComplex.
文摘电网换相换流器型高压直流输电(line-commutatedconverter based high voltage direct current,LCC-HVDC)系统存在换相失败风险,给电网的安全稳定运行带来威胁。首先分析了传统直流输电系统换相失败的机理;然后从控制保护、增加额外设备及换流器拓扑改造三个方面,综述了目前传统直流输电系统换相失败的抑制方法;最后,面对当今新能源电力系统中交直流混联错综复杂的特征,从换相失败的准确数学模型、复杂耦合机理、快速预测判断指标及新型抑制手段等方面,指出未来在换相失败抑制方面值得深入探索挖掘的研究方向。
