In an islanded microgrid with distributed generators (DGs), on account of the influence of feeder impedance, load and other factors, it is difficult to dispatch output power reasonably by means of droop control, there...
详细信息
In an islanded microgrid with distributed generators (DGs), on account of the influence of feeder impedance, load and other factors, it is difficult to dispatch output power reasonably by means of droop control, therefore the secondary control is employed to solve this problem. However, the convention methods may fail to achieve the expected effect. In this context, an improved distributed control strategy based on multi-agent consensus algorithm is proposed in this paper. A virtual leader is set to track the balance of power. Through the mutual communication between DGs, it can realize the flexible distribution of load power and has good convergence. By introducing the integral controller on the basis of conventional droop control, the droop curve can move adaptively to maintain frequency and voltage stable. Finally, the effectiveness of the proposed scheme and the performance of anti-communication failure are verified in MATLAB/Simulink simulation platform.
Determining how to enhance performance of pose tracking in internal uncertainties, external disturbances, and the mutual interference among actuators is a promising research topic for six-degree-of-freedom (DOF) paral...
详细信息
Determining how to enhance performance of pose tracking in internal uncertainties, external disturbances, and the mutual interference among actuators is a promising research topic for six-degree-of-freedom (DOF) parallel mechanism. To address these challenges, this study introduces a collaborative pose tracking control strategy that integrates third-order active disturbance rejection control (ADRC) for a single actuator and multi-agentconsensus control for multiple actuators. Solved the problem of reduced pose tracking accuracy caused by internal modeling uncertainty of actuators, external interference, and mutual interference between actuators. And the stability of this control approach is theoretically proven. Subsequently, the control strategy is implemented on a six-DOF parallel mechanism for comprehensive simulation and experimental. Simulation and experimental results show that compared with using an ADRC to regulate a single actuator, the proposed control strategy reduces position and attitude errors by about 90%, verifying the effectiveness of the control strategy proposed in this paper.
This study proposes two nonsingular distributed cooperative guidance strategies to solve the problem of the three-dimensional (3D) cooperative guidance of multiple interceptors attacking a stationary target. The coope...
详细信息
This study proposes two nonsingular distributed cooperative guidance strategies to solve the problem of the three-dimensional (3D) cooperative guidance of multiple interceptors attacking a stationary target. The cooperative 3D nonlinear engagement kinematics is first formulated. We then derive guidance commands based on two expressions of the time-to-go estimate by using a combination of the multi-agent consensus algorithm and the nonsingular guidance law, where they are presented without the assumption of a small lead angle. An additional component of the guidance command is investigated to prevent the Lyapunov function from becoming negative semi-definite, and the finite-time stability of the consensus error is guaranteed. Following the convergence of the consensus error, the stability of the lead angle is presented without confining the control parameter. By using the proposed strategies, multiple interceptors can attack the target simultaneously, and the impact time is determined during engagement. A number of simulation scenarios are considered to verify the effectiveness of the proposed control strategies. (C) 2021 Published by Elsevier Masson SAS.
This paper investigates the consensus problem of the frequency and voltage in islanded microgrid A distributed secondary control strategy is proposed which is based on the multi-agent cooperative control method combin...
详细信息
ISBN:
(纸本)9781728140940
This paper investigates the consensus problem of the frequency and voltage in islanded microgrid A distributed secondary control strategy is proposed which is based on the multi-agent cooperative control method combined with event-triggered mechanism and achieves the frequency and voltage restoration. During the control process, the controller is designed to work as necessary to mitigate the communication burden and the number of executions. In addition, the influence of communication delay on control algorithm is taken into account in this paper. Finally, several simulation results verify the effectiveness of the proposed methods.
暂无评论