Based on the specific conditions,this article brings a single-phase distribution transformer with typical configuration and discusses its installation method.According to the applying examples,the comprehensive efficiency of the single-phase distribution transformer is analyzed,and its application prospect is simply introduced.

该文结合具体实际,给出单相配电变压器的一种典型配置,并对单相配电变压器的安装方式进行了探讨,根据应用范例对单相配电变压器应用的综合效益进行了分析,并就单相配电变压器应用前景发表看法。

本文研制开发了一种新型 FRP 空心桥面板, 采用了外部纤维缠绕构造提高了 FRP 材料的利用效率, 增加了构件的承载能力. 通过 3 个试件的静载试验和 1 个试件的疲劳试验, 证明了这种新型 FRP 桥面板的具有优越的受力性能, 可应用于实际桥梁工程. 还研究了外部纤维缠绕层的增强作用, 探讨了其增强机理.

When the single phase to grounding fault occurs, the respective influence of two different synchronizing signals, i.e., the line current i and capacitor voltage uc, on TCSC device are studied by the digital simulation, dynamic simulation and theoretical analysis. Taking the line current i as synchronizing signal, the serious DC component will appear in line current i and the line current i will be seriously distorted when single phase grounding fault occurs. Taking the capacitor voltage uc as synchronizing signal, there is not serious DC component in the power system, but serious low-order harmonics. So both the line current and the capacitor voltage are not suitable for being used as the synchronizing signal. It is more rational to take the fundamental component of the line current for being used as the synchronizing signal of TCSC. The advantage of this method is to eliminate the DC component and harmonic components and the starting point of the phase angle of the synchronizing signal will not be shifted, and it is helpful for the stable operation of the power system. In this paper an efficient control strategy is proposed and this strategy can reduce the adjusting time during the fault process and reduce the harmful effect from the fault and improve the control characteristics of power system transient stability.

介绍基于现代电力电子技术的串联型电能质量补偿器的工作原理.通过仿真和实验表明,它是解决配电网电压质量问题的有效手段之一,具有广泛的应用前景.