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Prescribed Performance Voltage Regulation in Islanded Microgrids: An Event-Triggered Fault Compensation Approach
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DOI：10.1109/TPWRD.2025.3648841.png)
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Abstract
En 中文
This paper addresses the voltage control and dynamic performance optimization of inverter-based distributed generation units in islanded microgrids. To tackle practical challenges such as system dynamic constraints, nonlinear characteristics, uncertain actuator faults, and limited communication resources, a distributed cooperative control strategy based on a multi-agent system is proposed. First, to strictly constrain the consensus error in the distributed control system, a barrier function configured with a hyperbolic sine function is designed. This ensures that the consensus error satisfies the preset performance constraints, thereby improving the controllability of the system's dynamic evolution. Second, to address potential unknown actuator faults such as partial failure and bias misalignment, a second-order dynamic compensation signal is constructed and combined with an adaptive law to achieve real-time online estimation and rapid compensation of fault parameters. This significantly enhances the system's fault tolerance and robustness. Finally, to reduce the communication burden in the distributed control system and effectively suppress grid harmonics and oscillations caused by abrupt changes in control commands, an event-triggered control mechanism with a decreasing threshold characteristic is introduced, saving communication resources for the microgrid. Theoretical analysis and simulation results verify the effectiveness and superiority of the proposed method.
Keywords:
Microgrids
Actuators
Voltage control
Power system dynamics
Fault tolerant systems
Fault tolerance
Robustness
Real-time systems
Event detection
Decentralized control
fuzzy adaptive control
dead-zone input
asymmetric barrier function
multi-agent systems
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