Using microseismic distribution characteristics analysis response characteristics of faults and natural fractures in fracturing process: A case study of Shizigou Structure in Qaidam Basin

2019 ◽  
Author(s):  
Kaiyuan Du ◽  
Hai Lin ◽  
Youyu Wan ◽  
Feng Heng ◽  
Wenli Xu ◽  
...  
Keyword(s):  
Qaidam Basin ◽  
Distribution Characteristics ◽  
Natural Fractures ◽  
Response Characteristics ◽  
Fracturing Process ◽  
Characteristics Analysis

Impact of Natural Fractures in Reservoir Modelling and Characterization. Case Study in UAE

2018 ◽  
Author(s):  
Johannes Mandl ◽  
Carey Mills ◽  
Eissa Al Obaidli ◽  
Mahmoud Basioni ◽  
Khalfan Al Ali ◽  
...  
Keyword(s):  
Natural Fractures ◽  
Reservoir Modelling

scholarly journals Linear Active Disturbance Rejection Control for DC Bus Voltage of Permanent Magnet Synchronous Generator Based on Total Disturbance Differential

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3906 ◽  
Author(s):  
Xuesong Zhou ◽  
Mao Liu ◽  
Youjie Ma ◽  
Bao Yang ◽  
Faqing Zhao
Keyword(s):  
Disturbance Rejection ◽  
Synchronous Generator ◽  
Operating Conditions ◽  
Active Disturbance Rejection Control ◽  
Nonlinear Load ◽  
Differential Signal ◽  
Response Characteristics ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Characteristics Analysis

The wind power grid-connected inverter system has nonlinear, strong coupling, and is susceptible to grid voltage fluctuations and nonlinear load effects. To achieve satisfactory control results, the voltage outer loop is controlled by an improved linear active disturbance rejection control (LADRC). LADRC has strong adaptability, robustness and operability. It can automatically detect and compensate for internal and external disturbances, and correct complex controlled objects to integrator series. The total perturbation differential signal is introduced in the traditional linear extended state observer (LESO), which improves the dynamic perturbation observation ability of LESO. The frequency response characteristics analysis shows that the new LADRC has better anti-interference performance. The effectiveness of the improved controller under multiple operating conditions is verified by simulation.

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