Cause Based Analysis of Power Quality Disturbances in a Three Phase System

2018 ◽  
Author(s):  
Rajat Kumar ◽  
Sanjay Marwaha ◽  
Raj Kumar
Keyword(s):  
Power Quality ◽  
Phase System ◽  
Three Phase ◽  
Power Quality Disturbances

scholarly journals Hardware for classification of power quality problems in three phase system using Microcontroller

2017 ◽  
Vol 4 (1) ◽  
pp. 1386364 ◽  
Author(s):  
S. Asha Kiranmai ◽  
A. Jaya Laxmi ◽  
Qingsong Ai
Keyword(s):  
Power Quality ◽  
Phase System ◽  
Three Phase

scholarly journals Design and analysis of a Three Phase Transformerless Hybrid Series Active Power Filter based on sliding mode control using PQ-theory and stationary reference frames

2019 ◽  
Vol 16 (3) ◽  
pp. 289-310 ◽  
Author(s):  
Vinay Naguboina ◽  
Satish Gudey
Keyword(s):  
Power Quality ◽  
Single Phase ◽  
Sliding Mode ◽  
Active Power Filter ◽  
Constant Load ◽  
Active Power ◽  
Phase System ◽  
Load Voltage ◽  
Power Filter ◽  
Three Phase

In this work, a Three phase Transformerless Hybrid Series Active Power Filter (THSeAF) based on Sliding Mode Control (SMC) is proposed to mitigate the voltage and current distortions present in an electrical distribution systems (EDS). A Sliding Mode Controller is designed by controlling the parameters present on the load side as well as source side of the system. Three separate voltage source converters (VSC) are used. The mod1elling of the system is derived by considering a single-phase system by using state space analysis. The frequency response characteristics have been derived for the single-phase system and the stability of the system is studied. It is observed that the system has good stability margins when the SMC is applied at the source side compared to load side. Simulation results obtained in PSCAD/EMTDC v4.6 have been observed for power quality issues like voltage sags, voltage swells, voltage distortions, voltage unbalances and their concurrent occurrence. The approach of stationary reference frame was used for source side control and PQ theory is used for load side control. It is observed that the proposed controller works well in obtaining a stable and constant load voltage during these power quality issues. The difference in settling time observed is around 4 ms for the load side and source side control. The THD present in the load voltage is near about 1%. The SMC is found to be robust in obtaining a constant load voltage with low THD and an improved power factor.

scholarly journals Area-Based Approach in Power Quality Assessment

2008 ◽  
Vol 2008 ◽  
pp. 1-6 ◽  
Author(s):  
Surajit Chattopadhyay ◽  
Samarjit Sengupta ◽  
Madhuchhanda Mitra
Keyword(s):  
Power Quality ◽  
Quality Parameters ◽  
Computational Effort ◽  
Phase System ◽  
Transformation Technique ◽  
Three Phase ◽  
Harmonic Voltage ◽  
Park Transformation ◽  
Harmonic Components ◽  
Good Agreement

This paper presents an approach for assessment of power quality parameters using analysis of fundamental and harmonic voltage and current waveforms. Park transformation technique has been utilized for the analysis in three-phase system, which has reduced the computational effort to a great extent. Contributions of fundamental and harmonic components in power system voltage and current signals have been assessed separately. An algorithm has been developed to calculate the power quality parameters from online signals. This algorithm has been simulated for a radial system, and the results have been compared with that obtained from a standard FFT-based system. The results are seen to be in good agreement with that of the standard system.

Power Quality Assessment in a Distribution Network

2009 ◽  
Vol 62-64 ◽  
pp. 53-59 ◽  
Author(s):  
B.A. Adegboye
Keyword(s):  
Quality Assessment ◽  
Power Quality ◽  
Power Factor ◽  
Textile Industry ◽  
Distribution Network ◽  
Harmonic Distortion ◽  
Three Phase ◽  
Blue Phases ◽  
Power Quality Disturbances

The paper explores power quality disturbances on a specified section of the distribution network of a Textile Industry in Kaduna State of Nigeria. The 33kV PHCN incoming to the industry is stepped down to 11kV by a 7.5MVA, 33/11kV three-phase transformer. This transformer supplies various 11/.415kV transformers present in the distribution network. Another 11kV PHCN incoming is used in event of any failure from the 33/11kV transformer. The paper focuses on Transformer No. 1, a 150kVA, 11/.415kV three-phase transformer operating at 0.9 power factor, located at printing and dying (P/D) building 1. Majority of the loads on it are inductive. Measurements were taken at the secondary terminal of this transformer by the use of the Harmonitor 3000 power analyzer, which generates the voltage and current waveforms, power factor, voltage and current total harmonic distortion and the apparent power of the red, yellow and blue phases of the transformer. Analyses of these data reveal the disturbances due to harmonics in the phases and neutral of the transformer. The effect of the harmonic current is seen as poor power factor of the transformer. Considering the observations and analyses of the power quality of the transformer 1 (P/D), the paper proposes some recommendations for improving the power quality of the distribution network under study.

scholarly journals Effective Renewable Source Integration using Unified Power Quality Conditioner with Power Quality Enhancement in Three Phase System

2018 ◽  
Vol 225 ◽  
pp. 05014 ◽  
Author(s):  
P. Suresh ◽  
T. Gowri Manohar
Keyword(s):  
Power Quality ◽  
Control Strategy ◽  
Reactive Power ◽  
Phase System ◽  
Nonlinear Loads ◽  
Renewable Source ◽  
Active Power Filters ◽  
Unified Power Quality Conditioner ◽  
Three Phase ◽  
Power Quality Conditioner

This paper proposes a modified control strategy for unified Power Quality conditioner to alleviate voltage and current abnormalities in three phase system. Renewable source integration and nonlinear loads depreciates Power Quality of the system. Active Power Filters play a paramount role in alleviating PQ disturbances. To deal with current imperfections and reactive power compensation, modified dq controller is proposed for shunt controller. ANFIS-dq control strategy is proposed for Series Controller to suppress voltage imperfections Photovoltaic unit is optimally connected at DC link of UPQC for supporting controlling action and to deliver real power Proposed optimal renewable source integrated UPQC performance is studied with traditional PI and ANFIS controller. MATLAB / SIMULINK platform is used for analyzing proposed system performance.

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