Economic Dispatch by Secondary Distributed Control in Microgrids

Experimental Hybrid AC/DC-Microgrid Prototype for Laboratory Research

“…Using the AC side, distributed control strategies for isolated MGs presented in [11][12][13], have been experimentally validated. Whereas the authors of [11] presented a control strategy for the regulation of voltage and frequency using model predictive control, the authors of [12] presented a control scheme able to realise economic dispatch and congestion management in the MG. Furthermore, the authors of [13] proposed a strategy to share imbalances and harmonics in a four-wire droop-controlled MG.…”

“…These experimental results depict independent tests for the AC and DC MGs and then, for the whole hybrid MG. Previously reported results comprise the emulation of wind turbines via HIL [14,15], control schemes for dealing with power quality issues in 4-wire MGs [13,16,17], congestion management over AC lines in MGs [12] and, distributed predictive control in AC MGs [11,18]. Additionally, three papers were submitted to IEEE journals and are currently under review.…”

Distributed Control for a Cost-based Droop-free Microgrid

“…A first analysis is realized concerning a comparison between the proposed control algorithms, i.e. the finite-time protocol of (11)-( 12) as well as its linear variation ({α, β, γ} = 1), and the reported strategy in [18]. The controller in [18] is selected because it uses a simple and validated structure, initially proposed by [13].…”

“…Following a similar path, in [16] a multi-functional controller was made by the combination of [14] and [13]. For the economic dispatch consideration, several works such as [17], [18] have adapted consensus protocols of incremental cost replacing the conventional active power.…”

“…Fig.2: Simulation comparison of DG1 for the consensus protocols in[18] and (11)-(12) (including its asymptotic version) under a load impact…”