Phasor Measurement Unit Assisted Inverter—A Novel Approach for DC Microgrids Performance Enhancement

Abstract

DC microgrids are set to change the landscape of future energy markets. However, a wide-scale deployment faces three major issues: initial synchronization of microgrid with the utility grid, slip management during its operation, and mitigation of distortions produced by the inverter. This paper proposes a Phasor Measurement Unit (PMU) Assisted Inverter (PAI) that addresses these three issues in a single solution. The proposed PAI continually receives real-time data from a Phasor Measurement Unit installed in the distribution system of a utility company and keeps constructing a real-time reference signal for the inverter. A well-constructed, real-time reference signal plays a vital role in addressing the above issues. The results show that the proposed PAI is 97.95% efficient.

Optimal Coordinated Control of DC Microgrid Based on Hybrid PSO–GWO Algorithm

“…Instead of utilizing traditional mathematical formulae, the exploitation and exploration of the first three agents' sites in the search space are updated in HPSO-GWO. The mathematical expressions are shown in Equations ( 11)- (17).…”

“…Furthermore, → X 1 , → X 2 , and → X 3 indicate that the final position of such wolves can be calculated by adopting Equations ( 14)- (16). It is worth mentioning that the calculated parameters in Equations ( 14)-( 16) are applied in Equation (17) to determine the estimated position of the prey. The velocities and positions of the wolves, which are signified by v i k and x i k , can be updated by using the PSO approach as follows (Equations ( 18) and ( 19)):…”

“…DC voltage rates are required for the operation of most modern electronic devices, including LED bulbs, phones/laptops chargers, and televisions. Therefore, DC MGs may address the rising demand in remote and tiny towns worldwide because of these qualities [17]. It is worth mentioning that the control of DC-bus voltage, besides power-sharing in the DC MGs, is a crucial aspect that scholars always need to be focused on [6].…”

“…In the first control layer of the MG, the primary control goals are determined to achieve adequate power and bus voltage stabilization within allowable constraints. Numerous control strategies have been put forth at the local control levels [14][15][16][17][18][19][20][21][22][23][24][25] to achieve these objectives. For realizing such objectives, there are various extensive studies on solving control issues in the local layers, especially droop control methods, including voltage/current, current/voltage, or voltage/power, which are often used to coordinate autonomously distributed units and manage the flow of power between load demand and generation [19][20][21].…”

Simulation of Power Router-Based DC Distribution Systems with Distributed Generation and Energy Storage Units

“…The paper [29] proposes various multiport converters for voltage regulation in hybrid networks. The paper [30] proposes a Phasor Measuring Unit (PMU)-enabled converter that improves the performance of DC microgrids. In addition, an analysis of existing power converters for DC grids is presented in [31,32].…”