External filtered neutron beams have been developed at the horizontal radial channels No. 4 of Dalat research reactor. In the material composition of the neutron filters, the primary material components of Iron, Alumi...External filtered neutron beams have been developed at the horizontal radial channels No. 4 of Dalat research reactor. In the material composition of the neutron filters, the primary material components of Iron, Aluminum, Nickel and Vanadium are used to obtain the mono-energetic neutron beams of 24 and 59 keV, with low level of Gamma and slow neutron background. A computer code and Monte-Carlo simulation technique were applied to optimize the filter configurations and to deduce the neutron energy distributions in the filtered beams. A hydrogen-filled proton recoil detector and the activation method with Gold foils were used to measure the neutron energy spectrum and flux of each beam at sample position. The results of experimental neutron fluxes are 6.1 × 105 and 5.3 × 105 n/cm2/s for 24 and 59 keV beams, respectively.展开更多
太阳能光伏发电直接并网系统有多支路性和模块化的特点。将LC滤波器的空心电抗器作为分裂变压器的一个独立绕组以特殊的绕组布置方式集成于分裂变压器中,以达到减少光伏发电并网系统支路个数、精简电力设备数量、减小设备占地面积的目...太阳能光伏发电直接并网系统有多支路性和模块化的特点。将LC滤波器的空心电抗器作为分裂变压器的一个独立绕组以特殊的绕组布置方式集成于分裂变压器中,以达到减少光伏发电并网系统支路个数、精简电力设备数量、减小设备占地面积的目的。本文详细介绍了集成滤波电抗分裂变压器的工作原理,研制出一台1250 k V·A/10.5 k V变压器实物,搭建了1 MW光伏发电并网系统模型。通过实测数据和仿真分析分别论证了非正交解耦理论的正确性和方案的合理性。展开更多
文摘External filtered neutron beams have been developed at the horizontal radial channels No. 4 of Dalat research reactor. In the material composition of the neutron filters, the primary material components of Iron, Aluminum, Nickel and Vanadium are used to obtain the mono-energetic neutron beams of 24 and 59 keV, with low level of Gamma and slow neutron background. A computer code and Monte-Carlo simulation technique were applied to optimize the filter configurations and to deduce the neutron energy distributions in the filtered beams. A hydrogen-filled proton recoil detector and the activation method with Gold foils were used to measure the neutron energy spectrum and flux of each beam at sample position. The results of experimental neutron fluxes are 6.1 × 105 and 5.3 × 105 n/cm2/s for 24 and 59 keV beams, respectively.
文摘太阳能光伏发电直接并网系统有多支路性和模块化的特点。将LC滤波器的空心电抗器作为分裂变压器的一个独立绕组以特殊的绕组布置方式集成于分裂变压器中,以达到减少光伏发电并网系统支路个数、精简电力设备数量、减小设备占地面积的目的。本文详细介绍了集成滤波电抗分裂变压器的工作原理,研制出一台1250 k V·A/10.5 k V变压器实物,搭建了1 MW光伏发电并网系统模型。通过实测数据和仿真分析分别论证了非正交解耦理论的正确性和方案的合理性。
