Design of Single-phase Electrical Spring Considering Grid Current Based on PR Controller and Critical Load Current Feedback

2021 ◽  
Author(s):  
WEI Yi ◽  
ZHAO Chaohui ◽  
DUAN Yubin
Keyword(s):  
Critical Load ◽  
Single Phase ◽  
Current Feedback ◽  
Load Current ◽  
Grid Current ◽  
Pr Controller

scholarly journals Design and testing of stability improvement of nine multi-level H-Inverter for distribution system

2019 ◽  
Vol 8 (4) ◽  
pp. 245 ◽  
Author(s):  
R. Arulmurugan
Keyword(s):  
Distribution System ◽  
Single Phase ◽  
Phase Distribution ◽  
Dynamic Compensation ◽  
Load Current ◽  
Energy Compensation ◽  
Multi Level ◽  
Solitary Phase ◽  
Design And Testing ◽  
Reference Input

<p class="Abstract">In this article, a solitary phase nine-level series connected H-Bridge powered by photovoltaic MPPT based SHAPF in view of basic controller is proposed. SRF is utilized for reference input current extraction and to create pulses for the SHAPF. The principle point of the cascaded bridge is to dispense harmonics, enhance power factor and reactive energy compensation of the single-phase distribution framework. The suggested control calculation has two parts, changing the load current into stationary reference outline directions and estimation of peak amplitude of load currents. Consequently, a basic and dependable controller effortlessly of execution was created. The calculation for single-phase SHAF is intending to perform with exact tracking performance under step changes in load currents and to give great dynamic compensation. In this article, synchronous reference theory PLL with Inverse-Park change is adopted for producing quadrature part of current. The execution of the control calculation is tried and assessed utilizing MATLAB/Simulink tool.</p>

scholarly journals Effect of load current harmonics on vibration of three-phase generator

2018 ◽  
Vol 197 ◽  
pp. 11023
Author(s):  
I Made Wiwit Kastawan
Keyword(s):  
Single Phase ◽  
Electrical Power ◽  
Electrical Power System ◽  
Negative Effects ◽  
Load Current ◽  
Current Harmonics ◽  
Three Phase ◽  
Non Linear ◽  
Electrical Loads ◽  
Linear Loading

Almost all today electrical loads are considered non-linear such as switch mode power supply (SMPS) for powering computer and mobile phone or variable speed drive (VSD) for driving home and industrial electric motors. These loads generate ac non-sinusoidal current containing a lot of harmonics as indicated by its high total harmonics distortion (THD) figure. Current harmonics bring negative effects into all electrical power system components, including three-phase generator. This paper provides analysis of load current harmonics effects on vibration of three-phase generator. Three different laboratory experiments have been conducted i.e. three-phase linear resistive loading, non-linear loading with a three-phase ac/dc converter and non-linear loading with three single-phase capacitor filtered ac/dc converters. Results show that the higher load current harmonics content the higher is vibration of the three-phase generator. Non-linear loading with a three-phase ac/dc converter that generate about 24.7% THD gives an increase of 4.3% and 5.5% in average of vertical and horizontal vibrations of the three-phase generator respectively. Further, non-linear loading with three single-phase capacitor filtered ac/dc converters that generate THD as high as 74.9% gives significant increase of 28.1% and 23.6% in average of vertical and horizontal vibrations respectively.

scholarly journals Robustness Improvement of Single-Phase Inverters Under Weak Grid Cases by Adding Grid Current Feedforward in Delay-Based Phase-Locked Loop

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 124275-124287 ◽  
Author(s):  
Jinming Xu ◽  
Shenyiyang Bian ◽  
Qiang Qian ◽  
Hao Qian ◽  
Shaojun Xie
Keyword(s):  
Single Phase ◽  
Phase Locked Loop ◽  
Grid Current ◽  
Weak Grid
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