变电站10kV、35kV电压互感器高压熔断器在线检测装置的研究

变电站内10kV或35kV出线多用于农网线路,走线复杂,线路通道环境较为恶劣,常常发生单相接地故障,导致10kV或35kV母线电压升高而造成电压互感器高压熔断器频繁熔断,由于感应电压的存在,在母线电压互感器二次绕组仍然存在一定幅值的电压,不利用变电站人员准确判断高压熔断器是否熔断,本文介绍的一种简易检测装置,可以不停电准确判断出高压熔断器的熔断情况,为后续检修工作提供可靠依据.     

Removal of Particles by ICRF Cleaning in HT-7 Superconducting Tokamak

1. IntroductionThe tokamak is a magnetically confined fusion device, Which demands ultra-vacuum and low impuritylevel for the plasma discharge. At the same time, therecycling of the working gas including its isotopesmust be decreased in favor of long pulse plasma discharge. For a larger superconducting tokamak of thefuture with a high power and a long pulse plasmadischarge, the recycling must be very low and theimpurity needs to be removed quickly.For decreasing the impurity content in the de…     

卷积反投影法重建康普顿背散射图像过程中的数据修正

CBS机是近几年才兴起的无损探测技术。它与CT技术不同之处是传统CT技术是利用射线穿过人体时,各个部位对射线吸收的衰减量的积分来重建图像,而CBS机是利用入射射线在人体各个部位中的某点产生背散射(散射角α大于90°)的光子数来重建图像。重点分析了利用经典的卷积反投影算法重建康普顿背散射扫描图像过程中的数据修正问题。     

Design and Simulation for the Pulse High-Voltage DC Power Supply (HVPS) of 1.2 MW/2.45 GHz HT-7U Lower Hybrid Current Drive System

1. IntroductionThe HVPS [2] (pulse high-voltage DC power supply) in design will not only supply power to theklystron of the future HT--7U, but also is ajccommodated to the LHCD system on the existing HT--7.Though the old power supply fed by both 10 kV electric grid and 120 MW/10 s AC--pulse gener'ator hasbeen applied reliably on the low hybrid current drivesystem of 1.2 MW/2.45 GHz HT--7, but causes muchtroubles to LC filter due to indeterminate phase difference in electric grid and…     

机载SAR多模式统一化成像处理技术研究

合成孔径雷达(SAR)技术能够实现感兴趣区域(ROI)的多模式成像与超高分辨观测。然而,超高分辨成像因多脉冲长时间相干积累而面临方位频谱混叠问题,且对于斜视情况下的凝视和滑动聚束模式,传统频域成像算法难以实现统一化处理。据此,本文提出了一种SAR多模式统一化成像处理算法。首先,采用线性距离走动校正削弱斜视数据的两维耦合。然后,结合基于方位Deramp技术的混叠频谱重建方法与方位重采样,实现混叠信号的恢复及聚焦深度问题的解决。最后,利用扩展的距离徙动算法进一步完成ROI精聚焦。本文所提算法能够对斜视的凝视和滑动聚束数据进行统一化的成像处理。基于点目标仿真与机载SAR多模式实测数据处理结果,验证了所提方法的有效性。     

基于RTLinux的低杂波数据采集系统

低杂波是驱动超导托卡马克中等离子体电流的主要手段之一。EAST系统对低杂波的长脉冲高功率要求使得低杂波数据采集系统的实时性要求大大提高。RTLinux属于硬实时操作系统，包含了一个RTCore内核负责处理硬件消息，接管中断。实时任务可在该内核平台上直接运行。该主要从系统结构和实现技术上阐述了EAST装置上基于RTLinux的低杂波数据采集系统。     

Experimental Research on Lower Hybrid Current Drive in Superconducting Tokamak HT-7

1.IntroductionAmegawattgradelowerhybridwave(LHW)system[l]wasconstructedonHT--7superconductingtokamak[2]in1996.TosustainlongpulsedischargesandtostudythephysicalpropertiesoftheplasmasmainlysustainedbyelectromagneticwavearethemainobjectivestodevelopLHCDtechnoLogyonHT-7.Thelowerhybridcurrentdrivehasbeendemonstratedonmanymachinestobeaneffectivenoninductivecurrentdrivemethodandapowerfultooltocontrolplasmacurrentprofile.Sofar,agreatprogressonLHCDresearchhasbeenmade,asmanifestedbyitsachievement…     

基于准实时数据的智能配电网理论线损计算

目前配电网自动化覆盖率低,可采集到的数据较少,因此提出一种基于准实时数据的理论线损计算方法。基于状态估计建立智能配电网理论线损计算模型,根据历史数据确定模型中负荷不等式约束上下界,采用内点法求解模型。所提模型可利用线路始端节点注入功率和部分变压器量测终端的量测数据估计配电网潮流状态。算例分析结果表明,所提模型所需量测量数量少,状态估计结果精度较高。     

他们逢人便说：“衣服没有一点干的”

“喂,是供电局吗？我们这里停电了,这大热天的,没有电睡不着呀!你们赶紧过来看看吧!”“好的,请您留下地址电话,不要着急,我们立刻派人处理!”8月4日凌晨3时许,随着银锭路米粉厂400千伏安公变“嘭”地一声巨响过后,周边一片漆黑,没有空调难以入睡的居民纷纷向95598拨打报修电话。     

High Power Microwave Test System and Simulated Experiments for HT-7

In lower hybrid current drive （LHCD） experiments in HT-7, LH wave coupled to the plasma from 12 klystrons is launched by a phased multi-junction grill. High power microwave reflection or arc, which threatens the klystrons, the wave-guide ceramic windows and the vacuum of the tokamak, occur sometimes during the experiments. For the sake of safety, a high power microwave test system to perform simulations was developed. In the test experiments, the klystron and window can be well protected with an optimized microwave monitor and a PIN switch. The layout of the test system and the simulated experiments for HT-7 are described in this paper.