Huazhong University of Science and Technology

Guangzhou Power Supply Co., Ltd.

Geo-science Research Institute of Shengli Oil Field Co. Ltd. of Sinopec

Haibo Su

Yang Li

Yong Wang

Yuan Pan

Wenxiong Mo

Junjia He

Zhao Yuan

Yanhu Chen

Lixue Chen

Yong Song

Kaijian Wu

Yongyi Zhou

Yajuan Dong

Fating Yuan

Duanping Wang

Xiantai Liu

Shuling Sui

Junxiang Liu

Shiming Zhang

A short circuit fault current limiter includes a circuit breaker, a transfer current limiting unit and a current detection unit. The current detection unit is connected to the circuit breaker in series, and the circuit breaker and the transfer current limiting unit are connected in parallel into the power system line. An output terminal of the current detection unit is connected to a control terminal of the transfer current limiting unit. The current detection unit is configured to detect a fault current flowing through a branch of the circuit breaker under a short circuit fault operating condition and trigger the corresponding trigger switch of the transfer current limiting unit to be switched on, so that the circuit breaker is disconnected and the secondary side winding of the coupling reactor is connected to the system line in series, which is capable of rapidly limiting the amplitude of the fault current and reducing impact of the fault current on the system.

Short circuit fault current limiter

A numerical simulation method for characterizing fluid channeling along large-aperture fractures of reservoirs relates to the field of petroleum reservoir development research and computational fluid dynamics. The conventional method can not effectively represent the rapid fluid channeling along large-aperture fractures. Aiming at solving the above technical problem, an advanced method is provided in the present invention. In the invented method, the geometric similarity and hydraulic similarity treatments of large-aperture fractures can be made simultaneously, moreover, the traditional numerical simulation software was improved to be an unstructured grid simulator. Therefore, the method of the present invention can effectively simulate the rapid fluid channeling along large-aperture fractures, consequently it can ensure the reliability of the simulation results and provide reasonable reference for the adjustment and optimization of oil field development plans. The present invention is simple in principle and easy to use, thus it has a great value of application and popularization.

Numerical simulation method for characterizing fluid channelling along large-aperture fractures of reservoirs

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Guangzhou, China

Haibo Su