Peak current-based control of parallel three-phase interfacing converters operation under unbalanced voltage

2016 ◽  
Author(s):  
Farzam Nejabatkhah ◽  
Yunwei Li ◽  
Kai Sun
Keyword(s):  
Peak Current ◽  
Three Phase ◽  
Unbalanced Voltage

scholarly journals A Novel Multilevel DC-Link Three-Phase T-Type Inverter

Energies ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 4186
Author(s):  
Saddam Shueai Alnamer ◽  
Saad Mekhilef ◽  
Hazlie Mokhlis ◽  
Nadia M. L. Tan
Keyword(s):  
High Efficiency ◽  
Short Circuit ◽  
Multilevel Converters ◽  
Passive Components ◽  
Medium Voltage ◽  
Three Phase ◽  
Unbalanced Voltage ◽  
Flying Capacitors ◽  
Voltage Deviation ◽  
Current Commutation

This research proposes a four-level T-type inverter that is suitable for low-power applications. The presented topology outranks other types of inverters in terms of a smaller number of semiconductor devices, absence of passive components such as clamping diodes and flying capacitors, low switching and conduction losses, and high efficiency. The proposed topology is free from voltage deviation and unbalanced voltage occurrences that are present in other multilevel converters having clamping diodes or flying capacitors. The proposed inverter can extend to N levels using unequal dc-link voltage sources for medium-voltage application. The inverter employs the simple fundamental frequency staircase modulation technique. Moreover, this paper presents a current commutation strategy to prevent the occurrences of short circuit and minimizing the number of required switching devices and switching transitions, resulting in improving the efficiency of the inverter. This paper also analyses the theoretical converter losses showing lower switching and conduction losses when compared to existing four-level inverters. The experimental validation of the proposed inverter shows its operating feasibility and a low output voltage THD.

Experimental Analysis on the Operating Performance of Induction Motor with Unbalance Power Supply Conditions

2014 ◽  
Vol 635-637 ◽  
pp. 1404-1407
Author(s):  
Yuan Xing Zhang ◽  
Fei Li ◽  
Ya Li Shen ◽  
Lei Juan Yang ◽  
Jie Li ◽  
...  
Keyword(s):  
Induction Motor ◽  
Power Supply ◽  
Power Efficiency ◽  
Single Phase ◽  
Reactive Power ◽  
Phase Voltage ◽  
Three Phase ◽  
Unbalanced Voltage ◽  
Negative Sequence Current ◽  
Domestic Appliances

Problems of power quality have been increasingly concerned by the researchers, as the domestic appliances we are usually used are single-phase load, which mainly causes the unbalance of three-phase voltage of power supply. If the induction motor is supplied by three-phase unbalanced voltage, the currents, active and reactive power, efficiency, and losses are affected as the negative-sequence current appears, this paper is emphasized on the induction motor’s characteristics when its’ power supply is three-phase unbalanced voltage by experimental research.

Three-phase unbalanced-voltage compensators

2000 ◽  
Vol 87 (8) ◽  
pp. 995-1011
Author(s):  
Jong-Hyun Kim ◽  
Gang-Youl Jeong ◽  
Bong-Hwan Kwon
Keyword(s):  
Three Phase ◽  
Unbalanced Voltage

Digital control of a three-phase four-leg inverter under unbalanced voltage conditions

2007 ◽  
Author(s):  
I. Vechiu ◽  
O. Curea ◽  
H. Camblong ◽  
S. Ceballos ◽  
J. L. Villate
Keyword(s):  
Digital Control ◽  
Three Phase ◽  
Unbalanced Voltage
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