Description of Voltage Fluctuations in LV Power Network with The Use of Pst Indicator And Voltage Fluctuation Indices

2008 ◽  
Author(s):  
Grzegorz Wiczynski
Keyword(s):  
Power Network ◽  
Voltage Fluctuation ◽  
Voltage Fluctuations

Research on Voltage Fluctuation and Flicker Extraction Method Based on Null Space Pursuit Algorithm

2014 ◽  
Vol 651-653 ◽  
pp. 2383-2385
Author(s):  
Xiao Ying Chen ◽  
Meng Wei Yang ◽  
Shu Wen Jia ◽  
Lei Jiang ◽  
Chao Zhang
Keyword(s):  
Simulation Analysis ◽  
Null Space ◽  
Quality Analysis ◽  
Practical Application ◽  
Voltage Fluctuation ◽  
Voltage Fluctuations ◽  
Original Algorithm ◽  
Improvement Measures ◽  
Power Quality Analysis ◽  
Computing Speed

In order to obtain more accurate and rapid voltage fluctuations and flicker signal and provide fast and accurate data for power quality analysis and improvement, this paper proposes the improvement measures of null space pursuit algorithm based on the analysis of the principle of null space pursuit algorithm, which improves the value of practical application. By the simulation analysis, it proves that the combined null space pursuit algorithm not only has the same advantage of high precision extraction and decent noise reduction capabilities as original algorithm but also improves its computing speed and enhances its practical value.

scholarly journals Fluctuation Suppression of DC-Link Voltage Using Control of Converters Connected with DC Distributed Generation

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5832
Author(s):  
Sang-Jae Choi ◽  
Sung-Hun Lim
Keyword(s):  
Power Generation ◽  
Distributed Generation ◽  
Low Voltage ◽  
Renewable Energy Sources ◽  
Voltage Fluctuation ◽  
Voltage Fluctuations ◽  
Dc Voltage ◽  
Low Voltage Ride Through ◽  
Dc Power ◽  
Fault Ride Through

Due to the increase in DC load and DC Power generation, the need for DC power system is emerging. Accordingly, FRT (fault ride through) and LVRT (low voltage ride through), which are related regulations for renewable energy sources, have been enacted, and operation algorithms of each converter are required for this. However, the operation of the converter according to LVRT regulations causes DC voltage fluctuations. In the current study, DC voltage fluctuation is suppressed through converter control of DC-linked battery. The controller was designed from the relational equation between DC voltage and instantaneous power of battery. The pattern of DC voltage fluctuations to the output of the PV (photovoltaic), which is a DC power generation source, was confirmed, and voltage fluctuation suppression was verified by applying the designed converter cooperation algorithm and controller.

Modeling and Simulation of Regenerative Braking Rectifier for Electric Vehicle

2014 ◽  
Vol 602-605 ◽  
pp. 2832-2835
Author(s):  
Mei Lan Zhou ◽  
Ge Hang Su ◽  
Jia Bin Wen
Keyword(s):  
Modeling And Simulation ◽  
Electric Vehicle ◽  
Simulation Experiment ◽  
Regenerative Braking ◽  
Energy Transformation ◽  
Voltage Fluctuation ◽  
Voltage Fluctuations ◽  
Dc Voltage ◽  
Working Status ◽  
Low Efficiency

Aiming at the problem of low efficiency of recycling energy in the process of regenerative braking for electric vehicle, SVPWM algorithm is applied to the process of energy transformation of regenerative braking in this paper. It is derived and verified that, through using SVPWM, DC voltage fluctuation can be reduced in the process of rectification. The simulation model is built basing on the Volkswagen LAVIDA EV. The simulation experiment was carried out combining with the actual working status of electric vehicle regenerative braking. The simulation experimental results prove that DC voltage fluctuations can be decreased and the efficiency of regenerative braking rectifier can be increased through SVPWM. The following feature of rectifier in the braking condition is good.

Modeling of AC Power Network Consisting of Bidirectional AC-DC Converter Modules for Power Flow Design

2014 ◽  
Vol 2 ◽  
pp. 65-68
Author(s):  
Takashi Hisakado ◽  
Ryoya Kazaoka ◽  
Kazushi Fukae ◽  
Osami Wada
Keyword(s):  
Power Flow ◽  
Power Network ◽  
Ac Power
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