A calculation method for maximum steady-state loss of VSC-HVDC grounding resistor in Luxi back-back HVDC interconnector

Author(s):  
Weihuang Huang Weihuang Huang ◽  
Yuxin Lu Yuxin Lu ◽  
Xiaolin Li Xiaolin Li ◽  
Ying Huang Ying Huang ◽  
Shukai Xu Shukai Xu ◽  
...  
2018 ◽  
Vol 189 ◽  
pp. 02003 ◽  
Author(s):  
Heng Wu ◽  
Shufan Zhao ◽  
Jijun Zhang ◽  
Bo Sun ◽  
Hanqiang Song

Gas turbine power of turboshaft engine cannot be measured, a total of five typical steady state point test data from the ground slow state to the maximum state were selected according to the factory acceptance test drive of a certain type of carrier-based helicopter turboshaft engine. Combustion chamber three-dimensional simulation model was established to carry on simulation analysis of different typical steady state combustion process. The simulated combustion chamber exit section parameters are input into the established gas turbine isentropic adiabatic aerodynamic calculation model to obtain the gas turbine power and outlet temperature. Select five typical steady state points of five sets of turboshaft engines on the same type to repeat the above calculation process, and compare the calculated value of gas turbine outlet temperature with the acceptance test values, it is found that the error values are all within 5%, and the effectiveness and accuracy of the gas turbine power calculation method are verified.


1992 ◽  
Vol 52 (4) ◽  
pp. 417-426 ◽  
Author(s):  
Franck Le Coz ◽  
Christian Funck-Brentano ◽  
Jean-Marie Poirier ◽  
Yves Kibleur ◽  
François Xavier Mazoit ◽  
...  

1963 ◽  
Vol 85 (3) ◽  
pp. 235-244 ◽  
Author(s):  
R. P. Benedict ◽  
J. W. Murdock

A generalized thermometer well is analyzed as to temperature-measuring uncertainties. A reliable finite difference approximation to the differential heat balance equation is developed. For those cases where the fluid may be considered transparent to radiation (i.e., for εg ≈ 0), a simplified linearized approximation is given. Whenever conduction effects can be neglected (i.e., for (hc D/k)(L2/(D2 − d2)) > 20), a rapid hand-calculation method is indicated. Several examples of graphical approximations are given.


2013 ◽  
Vol 706-708 ◽  
pp. 1038-1041
Author(s):  
Lin Li ◽  
Jun Xu ◽  
Fu Lei Zheng

Based on the analysis of pilot handling behavior characteristics, this paper establishes the pilot transfer function model. According to the characteristics of closed-loop pilot-vehicle system and the relationship between pilot and flight quality, the specific calculation method of pilot model steady state gain was given. Take the aircraft roll angle manipulation for example, and simulate the pilot's manipulation of aircraft of dynamic process. The results show that: the pilot model steady state gain calculation method is simple and feasible, and have a certain reference value for the analysis of closed-loop pilot-vehicle system.


1980 ◽  
Vol 102 (4) ◽  
pp. 347-351
Author(s):  
W. H. Hebrank

A model is developed to simulate continuous steady state evaporation. The process is one that proceeds along adiabatic saturation curves. Aerodynamic effects of dryer air and circulation flow flux are combined with dryer temperature and humidity to compute evaporation rates. The calculation method requires several iteration loops and a computer program to do the work is described. Curves are presented of evaporation rates as affected by temperature, humidity, nozzle heat transfer efficiency and circulation flow quantity. Optimization of process cost and energy are discussed.


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