Nonlinear Power Flow Control design of high penetration renewable sources for AC inverter based microgrids

Optimal and Decentralized Control Strategies for Inverter-Based AC Microgrids

“…The optimal exergy destruction (OXD) controller is a centralized feedforward controller that identifies the inverter operating set points which will maximize the power delivered to the load by utilizing exergy analysis while minimizing the exergy destruction. The Hamiltonian-based feedback controller is a local, decentralized controller designed to minimize the bus load voltage variations with respect to a reference bus voltage [10]. To implement the OXD, ubiquitous communication is required.…”

“…First, this manuscript builds upon the work of [10] to show feedback control dynamic stability of the Hamiltonian-based feedback controller developed in [10]. After stability of the feedback controller developed in [10] has been established, the OXD and DPA feedforward controllers are developed, which are the main contributions of this manuscript. In Section 6, the DPA approach is first compared to the conventional P − ω/Q − V droop control.…”

“…The AC inverter microgrid model of [10] was expanded to N three-phase inverters, which are connected to a common wye-connected three-phase parallel resistor and capacitor balanced AC bus load, as shown in Figure 1. The load is sourced by N renewable, stochastic energy sources (v 1 , .…”

“…Despite the numerous control schemes and benefits presented in [3,[5][6][7][8][9], the authors are not aware of any publications that have described analytical, closed-form optimal solutions or decentralized alternative control schemes for inverter-based AC microgrids, which are the voids this manuscript aims to fill. Wilson et al [10] provided a solution to the problem of regulation and power balance in an AC inverter microgrid with high penetration levels of stochastic renewable sources by employing distributed storage. Through the use of distributed storage, they were able to maintain a constant bus voltage despite significant fluctuations from stochastic sources [10].…”

“…Wilson et al [10] provided a solution to the problem of regulation and power balance in an AC inverter microgrid with high penetration levels of stochastic renewable sources by employing distributed storage. Through the use of distributed storage, they were able to maintain a constant bus voltage despite significant fluctuations from stochastic sources [10]. Employing energy storage can be costly, both financially and in terms of system efficiencies.…”