Compensation Alternatives for Power Sharing Mismatch in Multiport DC–DC–AC Converters

A novel multiport converter switching scheme to integrate multiple renewable energy sources

“…MPCs have been taking much attention since last decade due to their capability in integrating multiple sources/loads in a cost‐efficient way 7 . Depending on the type of integrated sources/loads, MPCs can be divided into three categories: (a) DC MPCs, 8–10 (b) AC MPCs, 11–13 and (c) hybrid MPCs 14–17 . As shown in Figure 2A, the DC‐based RESs suffering from the intermittency are the main application for DC MPCs, where these sources are integrated with energy storage systems to create a smooth and programmable power generation at output.…”

“…In hybrid MPCs, both DC and AC sources/loads are integrated via a unified structure, as depicted in Figure 2C. This kind of MPCs is mainly exploited to connect multiple DC sources to the grid without any individual grid‐side converter 14–16 . As an accepted alternative way, the use of unified AC MPCs such as nine‐switch and multileg converters can reduce the number of switching devices, 18,19 hence the system's cost in ASDs and grid integration of RESs.…”

“…7 Depending on the type of integrated sources/loads, MPCs can be divided into three categories: (a) DC MPCs, [8][9][10] (b) AC MPCs, [11][12][13] and (c) hybrid MPCs. [14][15][16][17] As shown in Figure 2A, the DC-based RESs suffering from the intermittency are the main application for DC MPCs, where these sources are integrated with energy storage systems to create a smooth and programmable power generation at output. In DC MPCs, the DC-based RESs are directly connected to DC ports, although AC-based sources have to be connected using an individual rectifier.…”

“…This kind of MPCs is mainly exploited to connect multiple DC sources to the grid without any individual grid-side converter. [14][15][16] As an accepted alternative way, the use of unified AC MPCs such as nine-switch and multileg converters can reduce the number of switching devices, 18,19 hence the system's cost in ASDs and grid integration of RESs. These converters can be also used in integrating distributed energy resources (DERs) with the AC power grid, which can eventually help in building a low-cost microgrid.…”

Distributed Islanding Detection in Multisource DC Microgrids: Pilot Signal Cancelation

“…Although control strategies are generally simpler in DC than in AC [9], in such a complex scenario, control and protection strategies play an important role [10]. The use of different DGs (PV, micro-wind, fuel cell...), loads, and energy storage systems within the common DC bus create difficulties in the management of DC bus voltage due to power-sharing [11]; AC/DC converters are usually in charge of controlling the DC bus voltage [10]. During this scenario, it is essential to be aware of the connection state of the DC bus voltage forming converter.…”