China Petroleum Chemical Corporation

State Grid Shandong Electric Power Research Institute

Sinopec Petroleum Engineering Technology Service Co., Ltd.

Geosteering & Logging Research Institute, Sinopec Matrix Corporation

Sinopec Matrix Corporation

Shan Li

Hongbing Xiao

Dong Yang

Wei Chen

Qingming Ma

Ningning Yang

Shugang Hou

Zhixuan Zhang

Qinglong Liu

Wenting Liu

Kang Zhao

Facai Xing

Zhe Jiang

Dingyi Cheng

Baizhi Wu

Huan Ma

Wenxue Liu

Ning Zhou

Qiao Fang

Hao Tian

Xudong Hao

A mud pulse generation system based on two-way communication includes a turbine stator having at least two stator openings () each with a preset opening angle; a turbine rotor, having a sidewall provided with at least one wide blade and at least one narrow blade spaced from each other through several openings; a power generation module driven by rotation of the turbine rotor for supplying power; and a master device configured to control relative time when the wide blade or the narrow blade passes through the stator openings by controlling a controllable load of the power generation module based on uplink information, generate an uplink pulse signal with variable time intervals at the stator openings, and monitor and decode three-phase AC voltage signal output by the power generation module to obtain downlink information. This system is able to generate high-frequency pressure fluctuation pulse without requiring external power supply.

Mud pulse generation system based on two-way communication

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

Growing community of inventors

Shandong, China

Shan Li