Robust Hierarchical Control of VSC-Based Off-Grid AC Microgrids to Enhancing Stability and FRT Capability Considering Time-Varying Delays

Raeispour, Mohammad; Atrianfar, Hajar; Baghaee, Hamid Reza; Gharehpetian, Gevork B.

doi:10.1109/jestpe.2020.3017713

Cited by 15 publications

(13 citation statements)

References 35 publications

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“…The first step toward designing control algorithms in dynamic systems is to mathematically model their behavior using differential and algebraic equations. In this regard, the dynamic equations of the output connectors and LCL filters are acquired to tune the voltage and current controller's parameters in the primary layer [7]. This study aims to design a proper, distributed control algorithm for the secondary layer of islanded MGs.…”

Section: B Dynamic Modeling Of Microgridmentioning

confidence: 99%

“…These operations are based on local measurements and do not need external communications. Also, advanced techniques such as robust sliding mode control (SMC) [7], robust mixed H 2 /H ∞ output feedback control [8], model predictive control [9], and robust nonlinear control strategies [10], [11], have been proposed according to droop and non-droop manners in the primary layer.…”

Section: Introductionmentioning

confidence: 99%

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Fault-Tolerant, Distributed Control for Emerging, VSC-Based, Islanded Microgrids—An Approach Based on Simultaneous Passive Fault Detection

et al. 2022

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This paper proposes a fault-tolerant control and a robust, distributed, simultaneous, passive fault detection and isolation (or FDI) for islanded ac microgrids (MGs), including heterogeneous distributed generations and battery energy storage systems (BESSs). Disturbances and both actuator and sensor faults are considered in this paper to design a robust distributed control. The nature of the considered faults is general to deal with any sources, e.g., cyber threats (in the form of data integrity attacks) and sensor issues. In this regard, a mixed H ∞ /H − formulation is introduced in order to detect and eliminate the undesirable effects of the aforementioned defected components simultaneously, thereby achieving robust performance. Besides, sufficient conditions based on extended linear matrix inequality (also known as LMI) are outlined. Voltage and frequency regulation, active power-sharing, and the state of charge balance of BESSs under faulty conditions are investigated. Different scenarios are tested on a detailed model of a test MG system. The effectiveness of the proposed scheme on mitigating the impacts of faults and disturbances on the distributed energy resources' (DERs') performance is evaluated through comprehensive and comparative simulations based on MATLAB/Simulink. Moreover, experimental studies are conducted in order to validate the results in the corresponding practical scenarios.INDEX TERMS Distributed control, fault-tolerant, fault detection and isolation, linear matrix inequality, islanded microgrid, mixed H ∞ /H − optimization, voltage-source converter (VSC).

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Section: B Dynamic Modeling Of Microgridmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fault-Tolerant, Distributed Control for Emerging, VSC-Based, Islanded Microgrids—An Approach Based on Simultaneous Passive Fault Detection

et al. 2022

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“…Theorem 4. Consider the system (2), (3) with the control protocol ( 25)- (29). Let {t k } ∞ k=0 be the sequence of triggering instants generated by the triggering condition (12).…”

Section: Zeno Behavior Analysismentioning

confidence: 99%

“…In the last two decades, cooperation in multiagent systems has attracted researchers' attention in a wide area such as system control theory, computer science, distributed intelligent systems, power systems, microgrids, and so on. [1][2][3][4][5][6] Consensus problem is a fundamental problem in studying of multiagent systems. Consensus means that a group of agents or vehicles reach an agreement on a common value by negotiating with neighbors, asymptotically, or in a finite time.…”

Section: Introductionmentioning

confidence: 99%

Event‐triggered adaptive sliding mode control for consensus of heterogeneous nonlinear multiagent systems

Atrianfar

Yadollahi

2021

Intl J Robust & Nonlinear

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In this article, we peruse the consensus problem of nonlinear heterogeneous multiagent systems (MASs) in the presence of uncertainty and external disturbances. A new event-triggered adaptive sliding mode control is first proposed to achieve consensus for MASs consisting of heterogeneous nonlinear agents with nonidentical inherent dynamics and different-order dynamics. It is supposed that the uncertainties and their derivatives are bounded, but the upper-bounds are unknown. For reaching consensus in heterogeneous MAS, the proposed controller integrates two fundamental actions concurrently. First, an adaptive sliding-mode control strategy is adopted to guarantee the robust finite-time regulation of each individual nonlinear, uncertain, and heterogeneous agent dynamics to the sliding surface and keeping on it despite the unknown model uncertainties and disturbances. Then, the decoupled heterogeneous sliding surfaces are designed to align the agent trajectories to a consensus through local interactions, when they reach the sliding surface. Also, by applying a novel event-based strategy, we facilitate the usage of limited resources of embedded microprocessors that actuate the controller updates. We propose centralized and distributed event-triggered schemes, in which each agent decides itself when to transmit its current state to its neighbors based on the global network information or only the knowledge of their own neighbors' states. Moreover, it is shown that the interevent intervals are lower-bounded by a positive constant, and Zeno behavior is excluded. In the end, by doing simulation, verification of the theoretical results are presented.

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“…Another controller, the SMC (sliding mode controller), exhibits excellent dynamic performance. Moreover, SMC also has an excellent tracking ability for unbalanced loads, linear, and non-linear disturbances (Raeispour et al, 2020a;Li, 2016) Because of its stability and robustness against inner and external disturbances, SMC has found many modern power systems and renewable energy control (Li, 2016) In (Baghaee et al, 2018) a robust SMC control scheme has been proposed to improve stability and power-sharing for non-linear and linear loads. Moreover, the authors also proposed separate controllers for positive and negative sequences.…”

Section: Literature Reviewmentioning

confidence: 99%

The extended model predictive-sliding mode control of three-level AC/DC power converters with output voltage and load resistance variations

Abbas

Khalid

Awais

et al. 2021

Systems Science & Control Engineering

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In the proposed approach, an Extended Model Predictive Sliding Mode Controller (EMPSMC) is designed to control Three-Level Ac/Dc Power Converters to achieve improved dynamic performance and better. Steady-state stability. The traditional proportional-integral (PI) controller is used in the Model Predictive PI controller (MPPIC) technique to produce active power reference. However, this technique results in a significant overshoot/undershoot and steady-state error. Instead of PI, sliding mode control (SMC) is used to overcome these shortcomings. The performances of EMPSMC and MPPIC are compared and analyzed with and without disturbance. The results show that the system's settling time is minimized by introducing SMC, and the overshoot is also reduced. Moreover, it also provided better steady-state stability. Similarly, dynamic improvements are achieved with EMPSMC for tracking the desired dc reference voltage demand. The simulation results validate the performance of the designed model.

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Robust Hierarchical Control of VSC-Based Off-Grid AC Microgrids to Enhancing Stability and FRT Capability Considering Time-Varying Delays

Cited by 15 publications

References 35 publications

Fault-Tolerant, Distributed Control for Emerging, VSC-Based, Islanded Microgrids—An Approach Based on Simultaneous Passive Fault Detection

Fault-Tolerant, Distributed Control for Emerging, VSC-Based, Islanded Microgrids—An Approach Based on Simultaneous Passive Fault Detection

Event‐triggered adaptive sliding mode control for consensus of heterogeneous nonlinear multiagent systems

The extended model predictive-sliding mode control of three-level AC/DC power converters with output voltage and load resistance variations

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