Dynamic performance improvement of bidirectional battery chargers using predictive current control

2012 ◽  
Author(s):  
M. R. Abedi ◽  
Byeong-Mun Song ◽  
Rae-Young Kim
Keyword(s):  
Performance Improvement ◽  
Dynamic Performance ◽  
Current Control ◽  
Battery Chargers

Inductor Saturation Compensation in Three-Phase Three-Wire Voltage-Source Converters via Inverse System Dynamics-I

2020 ◽  
Author(s):  
Ziya Özkan ◽  
Ahmet Masum Hava
Keyword(s):  
Dynamic Model ◽  
Dynamic Performance ◽  
Current Control ◽  
Inverse System ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Two Phase ◽  
Inverse Dynamic ◽  
Three Phase ◽  
Steady State Current

In three-phase three-wire (3P3W) voltage-source converter (VSC) systems, utilization of filter inductors with deep saturation characteristics is often advantageous due to the improved size, cost, and efficiency. However, with the use of conventional synchronous frame current control (CSCC) methods, the inductor saturation results in significant dynamic performance loss and poor steady-state current waveform quality. This paper proposes an inverse dynamic model based compensation (IDMBC) method to overcome these performance issues. Accordingly, a review of inductor saturation and core materials is performed, and the motivation on the use of saturable inductors is clarified. Then, two-phase exact modelling of the 3P3W VSC control system is obtained and the drawbacks of CSCC have been demonstrated analytically. Based on the exact modelling, the inverse system dynamic model of the nonlinear system is obtained and employed such that the nonlinear plant is converted to a fictitious linear inductor system for linear current regulators to perform satisfactorily.

Dynamic Performance Improvement of Piezoelectrically Driven Micro-Lens Actuators

2020 ◽  
Vol 29 (6) ◽  
pp. 1418-1420
Author(s):  
Syed Mamun R. Rasid ◽  
Aron Michael ◽  
Ssu-Han Chen ◽  
Hemanshu Roy Pota ◽  
Chee Yee Kwok
Keyword(s):  
Performance Improvement ◽  
Dynamic Performance ◽  
Micro Lens

scholarly journals Separated Phase–Current Controls Using Inverter-Based DGs to Mitigate Effects of Fault Current Contribution from Synchronous DGs on Recloser–Fuse

2019 ◽  
Vol 9 (20) ◽  
pp. 4311 ◽  
Author(s):  
Boonyapakdee ◽  
Konghirun ◽  
Sangswang
Keyword(s):  
Dynamic Performance ◽  
Voltage Regulation ◽  
Current Control ◽  
Current Phase ◽  
Fault Current ◽  
Grid Voltage ◽  
Phase Current ◽  
Distributed Generators ◽  
Current Contribution ◽  
Measurement Units

Synchronous distributed generators (SDGs) significantly affect recloser–fuse coordination due to the high fault current contribution. This paper proposes a separated phase–current control using inverter-based distributed generators (IBDGs) to remove the effects of fault current contributions from SDGs during unsymmetrical faults. The three-phase current produced by IBDGs is independently controlled. While the total fault current is reduced by adjusting the current phase angle in the faulty phase, the energy in the DC-link capacitor (Cdc) is delivered to the grid in order to avoid the rise of DC-link voltage (Vdc) by means of injection of the active current into the nonfaulty phase. To maintain the proper grid voltage, the voltage regulation feature is installed in the IBDGs. Moreover, current estimations programmed within the IBDGs are introduced to avoid the performance degradation of separated phase–current controls caused by phasor measurement units (PMUs). The dynamic performance of the separated phase–current controls using IBDGs was evaluated using an IEEE 34-node radial test feeder. According to the simulation results, the IBDGs could eliminate the effects of fault current contributions from the SDG without interruption since the disconnections caused by excessive Vdc were prevented. They could also regulate the grid voltage in the nonfaulty phase.

Sign in / Sign up

Export Citation Format

Share Document