Active disturbance rejection control for power plant with a single loop

2010 ◽  
Vol 14 (1) ◽  
pp. 239-250 ◽  
Author(s):  
Yuanqing Xia ◽  
Bo Liu ◽  
Mengyin Fu
Keyword(s):  
Power Plant ◽  
Disturbance Rejection ◽  
Active Disturbance Rejection Control ◽  
Single Loop ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control

scholarly journals Robust L Approximation of an LCL Filter Type Grid-Connected Inverter Using Active Disturbance Rejection Control under Grid Impedance Uncertainty

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5276
Author(s):  
Muhammad Saleem ◽  
Muhammad Hanif Ahmed Khan Khushik ◽  
Hira Tahir ◽  
Rae-Young Kim
Keyword(s):  
Disturbance Rejection ◽  
Current Control ◽  
Pi Control ◽  
Active Disturbance Rejection Control ◽  
Lcl Filter ◽  
Single Loop ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Grid Impedance ◽  
Filter Type

High-order filters, such as LCL, are more commonly employed in grid-connected inverters (GcIs) as an interference element for the better attenuation of switching harmonics. However, LCL filters may have resonance poles and antiresonance zeros in the frequency response with inverter side current. This may affect the stability of the system and limit the control bandwidth with the simple single-loop PI control. This becomes severe with the introduction of grid impedance due to the large distance between renewable energy sources and the power grid. To mitigate this effect, active damping and sensorless damping is preferred with pre-information about grid impedance. In this paper, linear active disturbance rejection control (ADRC) is introduced, first to L filter type GcI and later extended to LCL filter type GcIs with minimum modification. From the frequency analysis, it is shown that the characteristics of the proposed control scheme remain the same even with a change in filter order and grid impedance. The resonance poles and antiresonance zeros in the LCL filter are compensated via the pole–zero cancelation technique. In addition to this, the preserve bandwidth, simple control design, and decoupled current control are also achieved with the proposed method. The robustness of the proposed method is compared with the single-loop PI control under different filter types and grid impedance uncertainty through MATLAB simulation and experimental outcomes.

scholarly journals Maximum Sensitivity-Constrained Data-Driven Active Disturbance Rejection Control with Application to Airflow Control in Power Plant

Energies ◽  
2019 ◽  
Vol 12 (2) ◽  
pp. 231 ◽  
Author(s):  
Ting He ◽  
Zhenlong Wu ◽  
Rongqi Shi ◽  
Donghai Li ◽  
Li Sun ◽  
...  
Keyword(s):  
Power Plant ◽  
Disturbance Rejection ◽  
Maximum Sensitivity ◽  
Data Driven ◽  
Tuning Parameter ◽  
Energy Structure ◽  
Active Disturbance Rejection Control ◽  
Uncertain Dynamics ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control

The increasing energy demand and the changing of energy structure have imposed higher requirements on the conventional large-scale power plants control. Complexity of the power plant processes and the frequent change of operation condition make the accurate physical models hard to obtain for control design. To this end, a data-driven control strategy, the active disturbance rejection control (ADRC) has received much attention for the estimation and mitigation of uncertain dynamics beyond the canonical form of cascaded integrators. However, the robustness of ADRC is seldom discussed in a quantitative manner. In this study, the maximum sensitivity is used to evaluate and then constrain the robustness of ADRC applied to high-order processes. Firstly, by using the new idea of the vertical asymptote of the Nyquist curve, a preliminary one-parameter-tuning method is developed. Secondly, a quantitative relationship between the maximum sensitivity and the tuning parameter is established using optimization methods. Then, the feasibility and effectiveness of the proposed method is initially verified in the total air flow control of a power plant simulator. Finally, field tests on the secondary airflow control in a 330 MWe circulating fluidized bed confirm the merit of the proposed maximum sensitivity-constrained ADRC tuning.

Active Disturbance Rejection Control for the Joint Driven by PMAs

ROBOT ◽  
2011 ◽  
Vol 33 (4) ◽  
pp. 461-466 ◽  
Author(s):  
Hao LIU ◽  
Tao WANG ◽  
Wei FAN ◽  
Tong ZHAO ◽  
Junzheng WANG
Keyword(s):  
Disturbance Rejection ◽  
Active Disturbance Rejection Control ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control
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