Secondary Control for Voltage Quality Enhancement in Microgrids

By M. Savaghebi, A. Jalilian, Juan Carlos Vasquez, Josep M. Guerrero. IEEE Transactions on Smart Grid, 2012

365 citations recorded by the source corpus.

In this paper, a hierarchical control scheme is proposed for enhancement of sensitive load bus (SLB) voltage quality in microgrids. The control structure consists of primary and secondary levels. The primary control level comprises distributed generators (DGs) local controllers. Each of these controllers includes a selective virtual impedance loop which is considered to improve sharing of fundamental and harmonic components of load current among the DG units. The sharing improvement is provided at the expense of increasing voltage unbalance and harmonic distortion. Thus, the secondary control level is applied to manage the compensation of SLB voltage unbalance and harmonics by sending proper control signals to the primary level. DGs compensation efforts are controlled locally at the primary level. The system design procedure for selecting proper control parameters is discussed. Simulation results are provided in order to demonstrate the effectiveness of the proposed control scheme.

Subfields: Control and Systems Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/07bbdd231b77f08aa70b56d34f1f962ee8bf3ae3

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Citations in the corpus

Distributed Control Strategies for Microgrids: An Overview (2020, methodology): “These are used for improving the sharing of unbalanced currents in the MG [119], [120], [185], for compensating the unbalanced voltage at some point of the MG [182], [183], [186] or for simultaneously fulfilling a combination of the two previous objectives [109], [136], [187].”
Secondary Frequency and Voltage Control of Islanded Microgrids via Distributed Averaging (2015, background): “O C ] 2 6 A pr 2 01 5 strategies have also been applied in the context of microgrids, and the term “secondary” has been broadened to include additional control goals such as reactive power sharing [11], [12], harmonic compensation, and voltage unbalance [2], [6], [8], [13].”
Droop-Based Distributed Cooperative Control for Microgrids With Time-Varying Delays (2016, neutral): “frequency) [7], and tertiary control (optimal operation) [8], [9].”
On the Secondary Control Architectures of AC Microgrids: An Overview (2020, neutral): “CSC scheme for voltage unbalance compensation [32].”
State of the Art in Research on Microgrids: A Review (2015, background): “The study in [217] proposes a hierarchical control where the secondary level sends proper control signals to the primary level to control selective compensation of sensitive load bus voltage fundamental negative sequence, as well as positive and negative sequences of main harmonics.”
Distributed Control Techniques in Microgrids (2014, methodology): “method for improving voltage quality and rejecting harmonics is proposed in [77], where harmonics are explicitly considered within a hierarchical scheme.”