State Grid Shandong Electric Power Research Institute

Qingdao Yunlu Advanced Materials Technology Co., Ltd.

Dong Yang

Qinghua Li

Jing Pang

Shan Li

Dingyi Cheng

Xudong Hao

Huan Ma

Zhixuan Zhang

Kang Zhao

Wenxue Liu

Facai Xing

Zhe Jiang

Hao Tian

Ning Zhou

Qiao Fang

The present disclosure provides a method and a system for quickly determining transient stability of a half-wavelength transmission system. The method includes: obtaining power and a power angle of a feeding-end generator of a half-wavelength transmission system; and determining transient power angle stability and a power angle instability mode of the half-wavelength transmission system by using a constructed index system, where two power angle instability modes, that is, an instability mode 1 and an instability mode 2, are specifically constructed for the half-wavelength transmission system based on an equal area method. Based on the equal area method, the present disclosure constructs two instability modes specific to the half-wavelength transmission system, so as to accurately describe transient power angle characteristics of the half-wavelength transmission system under a severe fault, and characteristics of the two instability modes are significantly different from those of an AC transmission mode.

Method and system for quickly determining transient stability of half-wavelength transmission system

Disclosed is an iron-based amorphous alloy FeBSiRE, wherein a, b, and c represent, in atomic percentages, the contents of corresponding components, respectively; 83.0≤a≤87.0, 11.0<b<15.0, 2.0≤c≤4.0, and a+b+c=100; and d is the concentration of RE in the iron-based amorphous alloy, i.e. 10 ppm≤d≤30 ppm. The iron-based amorphous alloy has a saturation magnetic induction intensity of no less than 1.63 T, and same can be used to manufacture a magnetic core material for power transformers, motors and inverters.

Iron-based amorphous alloy and preparation method therefor

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Shandong, China

Dong Yang