Integration of solar PV into grid using a new UPQC with differential inverter control

A new six‐switch converter based unified power quality conditioner for improving power quality in single‐phase system

“…Control of transformerless three‐leg UPQC with a novel space vector modulation method is explained in Reference 15. A new trend in UPQC has emerged where active power from distributed generation is also additionally fed to a connected network 17‐23 …”

“…A new trend in UPQC has emerged where active power from distributed generation is also additionally fed to a connected network. [17][18][19][20][21][22][23] A brief overview of the literature suggests that the researchers continuously explore different converter topologies and related control for single-phase UPQC system. Following the trend, the presented work proposed a new topology of UPQC for a single-phase system.…”

A transformerless active voltage quality regulator with the novel three‐leg circuit

“…Several topologies for DVR have been presented in [11][12][13][14][15][16][17]. DVR topologies can be classified from different aspects, includ-ing application occasions of DVR (DVR-Medium voltage system and DVR-Low voltage system), converter types (half-bridge and full-bridge), energy source (energy storage, auxiliary supply and front or back connected shunt converter etc.…”

“…The conventional DVR often contains a transformer which can provide electrical isolation or voltage transform. However, the injection transformer can increase more cost, occupy more space, contributes towards losses and causes other issues, such as saturation, nonlinear and magnetic biasing characteristics [13, 14]. From the design and operation maintenance point of view, the transformer adds complexity to the restorer.…”