scholarly journals Synchronous Generator Excitation System for a Ship Based on Active Disturbance Rejection Control

2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
Rongjie Wang ◽  
Xiangyu Liu ◽  
Yuyuan Huang
Keyword(s):  
Power System ◽  
Disturbance Rejection ◽  
Synchronous Generator ◽  
Voltage Regulator ◽  
Active Disturbance Rejection Control ◽  
Excitation Control ◽  
Excitation System ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Synchronous Generator Excitation

To solve synchronous generator oscillations in marine power systems which cannot be effectively suppressed, according to the nonlinearity and time variability of the ship power system, a method of synchronous generator excitation control for a ship based on active disturbance rejection control (ADRC) is proposed. Under different working conditions, three methods are automatic voltage regulator (AVR), automatic voltage regulator with power system stabilizer (PSS), and ADRC methods, which are applied to the two-generator parallel-running excitation system of a ship in simulations. The simulation results show that the excitation control system based on ADRC is faster and has better anti-interference ability and has a better restraining effect on synchronous generator oscillation.

scholarly journals A Control Strategy for Smooth Power Tracking of a Grid-Connected Virtual Synchronous Generator Based on Linear Active Disturbance Rejection Control

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 3024 ◽  
Author(s):  
Yaya Zhang ◽  
Jianzhong Zhu ◽  
Xueyu Dong ◽  
Pinchao Zhao ◽  
Peng Ge ◽  
...  
Keyword(s):  
Disturbance Rejection ◽  
Synchronous Generator ◽  
Active Power ◽  
Energy Resources ◽  
Active Disturbance Rejection Control ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
New Energy ◽  
Simulation Results ◽  
Virtual Synchronous Generator

The power quality of new energy resources has received tremendous attention recently. The control approach for the inverter, an interface between the new energy resources, and the infinite bus system is of vital importance. For the virtual synchronous generator (VSG), one of the research hotspots in the inverter control field, there are some challenges remaining to be dealt with. First is the contradiction between the rapid response and overshoot of active power output if VSG is connected to the grid. Secondly, the active power is deeply influenced by the fluctuation of gird frequency and this may bring power oscillation to VSG in weak grids. In this article, an active power controller for power tracking of grid-connected VSG is designed based on linear active disturbance rejection control (LADRC) by compensating for the lumped disturbance in a feedforward fashion. The parameters of the controller are analyzed and tuned in the frequency domain to acquire a desirable control performance. Moreover, the robustness of the control system is also considered. Simulation results show that the designed control system can transmit active power to the grid in a timely manner with no overshoot, as demanded. Additionally, it can output active power steadily according to the power reference without using a phase-locked loop (PLL) when the grid frequency has different features of fluctuation. In addition, the simulation results demonstrate that the improved VSG has strong robustness to the model parameter perturbation and mismatch.

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.

scholarly journals Load Frequency Active Disturbance Rejection Control for Multi-Source Power System Based on Soft Actor-Critic

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4804
Author(s):  
Yuemin Zheng ◽  
Jin Tao ◽  
Hao Sun ◽  
Qinglin Sun ◽  
Zengqiang Chen ◽  
...  
Keyword(s):  
Power System ◽  
Disturbance Rejection ◽  
Load Frequency Control ◽  
Control Mode ◽  
Active Disturbance Rejection Control ◽  
Source Power ◽  
Load Frequency ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Tie Line

To ensure the safe operation of an interconnected power system, it is necessary to maintain the stability of the frequency and the tie-line exchanged power. This is one of the hottest issues in the power system field and is usually called load frequency control. To overcome the influences of load disturbances on multi-source power systems containing thermal power plants, hydropower plants, and gas turbine plants, we design a linear active disturbance rejection control (LADRC) based on the tie-line bias control mode. For LADRC, the parameter selection of the controller directly affects the response performance of the entire system, and it is usually not feasible to manually adjust parameters. Therefore, to obtain the optimal controller parameters, we use the Soft Actor-Critic algorithm in reinforcement learning to obtain the controller parameters in real time, and we design the reward function according to the needs of the power system. We carry out simulation experiments to verify the effectiveness of the proposed method. Compared with the results of other proportional–integral–derivative control techniques using optimization algorithms and LADRC with constant parameters, the proposed method shows significant advantages in terms of overshoot, undershoot, and settling time. In addition, by adding different disturbances to different areas of the multi-source power system, we demonstrate the robustness of the proposed control strategy.

scholarly journals Load Frequency Control of Power Systems Based on ADRC

2020 ◽  
Vol 165 ◽  
pp. 06041
Author(s):  
Qian Liu ◽  
Meikui He ◽  
Zhen Fang ◽  
Ting Gui ◽  
Changqing Dong ◽  
...  
Keyword(s):  
Power System ◽  
Disturbance Rejection ◽  
Control Method ◽  
Frequency Control ◽  
Load Frequency Control ◽  
Active Disturbance Rejection Control ◽  
System Load ◽  
Load Frequency ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control

Load frequency stability is an important power quality index in power system, any sudden load disturbance will cause the system load frequency deviation, and as the power system becomes more complex, the difficulty of control is also increasing, it is necessary to find a more appropriate control method. Considering that the load frequency control system model has the characteristics of multi-variable and strong coupling, combines the superior anti-interference and anti-coupling ability of the active disturbance rejection control, a novel scheme for power system load frequency control was presented based on the principle of active disturbance rejection control and effective open-loop transfer function. The simulation results show that the proposed method is simple tuning and strong decoupling ability, and provides a successful control of load frequency.

Linear active disturbance rejection control approach for load frequency control of two-area interconnected power system

2017 ◽  
Vol 41 (6) ◽  
pp. 1562-1570 ◽  
Author(s):  
Congzhi Huang ◽  
Jing Li ◽  
Shicai Mu ◽  
Huaicheng Yan
Keyword(s):  
Power System ◽  
Control Problem ◽  
Disturbance Rejection ◽  
Frequency Control ◽  
Load Frequency Control ◽  
Active Disturbance Rejection Control ◽  
Control Approach ◽  
Load Frequency ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control

The performance optimization of the load frequency control problem for two-area interconnected power system is investigated by employing the gravitational search algorithm based linear active disturbance rejection control approach. Firstly, the load frequency control problem of a two-area power system with two identical non-reheated turbine units is formulated, taking into account the external step disturbance and parameters perturbation. Then, the essentials of the second order process oriented linear active disturbance rejection control approach are presented, where the parameters optimization procedure based on the gravitation search algorithm is proposed. Finally, the effectiveness of the proposed approach in the load frequency control problem is validated by the given extensive simulation examples. The disturbance rejection ability and the robustness with respect to the parameter perturbation of the proposed approach are also demonstrated.

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