equivalent model
Study on the Transmission Line Protection of the UHV Grid
With the 1000kV demonstration project completed, the power system will gradually form national interconnected UHV grid. It is necessary to study the effect of the UHV grid electromagnetic transient on the extra-high-voltage line protection, it is also necessary to study the new protection of the UHV transmission line. To study the UHV grid electromagnetic transient, [...]
Analysis and Simulation for Landing Impact of Landing Gears in Consideration of Fuselage Flexibility
Landing gear is an important component of the airplane, and the correct calculation of its dynamic performance ensures safe landing of aircraft. In the conventional design of landing gear, the fuselage is ususlly assumed as a rigid body, and the flexibility of fuselage is ignored. Flexibility of the large-scale modern aircraft become bigger and bigger, [...]
Study on Model Establishment and Control Strategy of VSCF Wind Power Generation System
The study on variable-speed constant-frequency (VSCF) wind power generation system has become the focus of wind power in its own good control performance and high efficiency in the regulation. Nowadays, doubly-fed induction generator is the most widely used for wind farms in China. Hence, this dissertation analyzes the theory of DFIG and its operating characteristics [...]
Application Research of Fault Diagnosis Technique in Locomotive Condition Monitoring Based on Instantaneous Speed
As Chinese railway transportation developing to higher speed and heavier load rapidly, monitoring the operation timely and accurately, predicting the potential malfunction or diagnosing the existing fault for the locomotive diesel become more and more important considering the safety and the economic benefits in the integrated management of the locomotive. Meanwhile, the condition monitoring and [...]
Research of Heat Transfer Characteristic of Air Cold Plate in Electronic Cabinet
Air cold plate because of the high heat transfer performance and compact structure, has became a very important radiator in electronic equipment, and make more and more the research for it in the recent years. Previously, the research of fin of air cold plate is mainly theoretical and experimental at home and abroad, by calculating [...]
Numerical Simulation Analysis of Basic Mechanical Properties and Failure Criterion for Masonry
The numerical simulation method for masonry is further studied by summarizing the current test data; and the method is used for the finite element analysis and simulation. A failure criterion equation is presented based on the Tsai-Wu’s tensor polynomial. The main research achievements are following:Through the analysis of the experimental study on material parameters and [...]