Small-Signal Analysis of the Microgrid Secondary Control Considering a Communication Time Delay

Coelho, E.A.A.; Wu, Dan; Guerrero, Josep M.; Vasquez, Juan C.; Dragičević, Tomislav; Stefanović, Čedomir; Popovski, Petar

doi:10.1109/tie.2016.2581155

Cited by 191 publications

(126 citation statements)

References 22 publications

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“…It's important to consider how to maintain MGC stability under the conditions of the fixed delays and random delays. This is also the main obstacle to apply the hierarchical control and MAS theory to solve the practical engineering problems [192].…”

Section: A Communication Mechanism Of the Multi-agent System Inmentioning

confidence: 99%

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MAS-Based Distributed Coordinated Control and Optimization in Microgrid and Microgrid Clusters: A Comprehensive Overview

Han

Zhang

et al. 2018

IEEE Trans. Power Electron.

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349

182

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Abstract-The increasing integration of the distributed renewable energy sources highlights the requirement to design various control strategies for microgrids (MGs) and microgrid clusters (MGCs). The multi-agent system (MAS)-based distributed coordinated control strategies shows the benefits to balance the power and energy, stabilize voltage and frequency, achieve economic and coordinated operation among the MGs and MGCs. However, the complex and diverse combinations of distributed generations in multi-agent system increase the complexity of system control and operation. In order to design the optimized configuration and control strategy using MAS, the topology models and mathematic models such as the graph topology model, non-cooperative game model, the genetic algorithm and particle swarm optimization algorithm are summarized. The merits and drawbacks of these control methods are compared. Moreover, since the consensus is a vital problem in the complex dynamical systems, the distributed MAS-based consensus protocols are systematically reviewed. NOMENCLATURE

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Section: A Communication Mechanism Of the Multi-agent System Inmentioning

confidence: 99%

“…7 (c), can be used to compensate the influence of the communication delays among the power devices in MGs or between the devices and upper level control, and reduce data loss [110][111][112][113]. When the control systems are decoupled, the characteristic equation of secondary control can be described as [192]:…”

Section: Random Communication Delaymentioning

confidence: 99%

MAS-Based Distributed Coordinated Control and Optimization in Microgrid and Microgrid Clusters: A Comprehensive Overview

Han

Zhang

et al. 2018

IEEE Trans. Power Electron.

Self Cite

349

182

View full text Add to dashboard Cite

show abstract

“…An arc from node j to node i is denoted by ( , ), where node j receives information from node i. aij is the weight of the arc connecting vi to vj. The multiagent consensus algorithms implemented across the MG system converge over time according to [29]. The global system dynamics can therefore be given as (15) and (16).…”

Section: Communication Networkmentioning

confidence: 99%

A Virtual Micro-Islanding-Based Control Paradigm for Renewable Microgrids

et al. 2018

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Improvements in control of renewable energy-based microgrids are a growing area of interest. A hierarchical control structure is popularly implemented to regulate key parameters such as power sharing between generation sources, system frequency and node voltages. A distributed control infrastructure is realized by means of a communication network that spans the micro-distribution grid. Measured and estimated values, as well as corrective signals are transmitted across this network to effect required system regulation. However, intermittent latencies and failures of component communication links may result in power imbalances between generation sources, deviations in node voltages and system frequency. This paper proposes a hierarchical control structure to regulate the operation of an islanded AC microgrid experiencing communication link failures. The proposed strategy aims to virtually sub-divide the microgrid into controllable "islands". Thereafter, active power sharing, frequency and voltage restoration is achieved by competing converter systems through multi-agent consensus. The effectiveness of the proposed methodology has been verified through stability analyses using system wide mathematical small signal models and case study simulations in MATLAB, Simpower systems.

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“…It has been demonstrated that the hierarchical control scheme can effectively restore the PCC voltage deviation. However, accurate PCC voltage control relies heavily on effective communication [24], which increases the system cost and reduce the operational reliability.…”

Section: Introductionmentioning

confidence: 99%

A Communicationless PCC Voltage Compensation Using an Improved Droop Control Scheme in Islanding Microgrids

Ding¹,

Gao²,

Li³

et al. 2017

Journal of Power Electronics

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This paper proposes a point of common coupling (PCC) voltage compensation method for islanding microgrids using an improved power sharing control scheme among distributed generators (DGs) without communication. The PCC voltage compensation algorithm is implemented in the droop control scheme to reduce the PCC voltage deviation produced by the droop controller itself and the voltage drop on the line impedance. The control scheme of each individual DG unit is designed to use only locally measured feedback variables and an obtained line impedance to calculate the PCC voltage. Therefore, traditional voltage measurement devices installed at the PCC as well as communication between the PCC and the DGs are not required. The proposed control scheme can maintain the PCC voltage amplitude within an allowed range even to some extent assuming inaccurate line impedance parameters. In addition, it can achieve proper power sharing in islanding microgrids. Experimental results obtained under accurate and inaccurate line impedances are presented to show the performance of the proposed control scheme in islanding microgrids.

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Small-Signal Analysis of the Microgrid Secondary Control Considering a Communication Time Delay

Cited by 191 publications

References 22 publications

MAS-Based Distributed Coordinated Control and Optimization in Microgrid and Microgrid Clusters: A Comprehensive Overview

MAS-Based Distributed Coordinated Control and Optimization in Microgrid and Microgrid Clusters: A Comprehensive Overview

A Virtual Micro-Islanding-Based Control Paradigm for Renewable Microgrids

A Communicationless PCC Voltage Compensation Using an Improved Droop Control Scheme in Islanding Microgrids

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