scholarly journals Comparative power quality analysis of Conventional and Proposed enhance SRF SOGI-FLL control based DSTATCOM

2021 ◽  
Author(s):  
Amit Kumar ◽  
◽  
Pradeep Kumar ◽  
Keyword(s):  
Power Quality ◽  
Sliding Mode ◽  
Voltage Regulation ◽  
Quality Analysis ◽  
Control Technique ◽  
Control Techniques ◽  
Synchronous Reference Frame ◽  
Unbalanced Load ◽  
Power Quality Analysis ◽  
Non Linear Load

This paper expresses about comparative power quality analysis in between conventional and proposed control techniques of DSTATCOM under different loading conditions. The goal of DSTATCOM is to reduce power quality problems, that occur due to an unbalanced load, non-linear load, power electronics based load and polluted grid. The performances of DSTATCOM are different in the different control techniques. Three conventional and one proposed control techniques have been employed in the DSTATCOM. Synchronous reference frame (SRF), Sliding mode control (SMC) and ADALINE based LMS control are the conventional techniques while enhanced SRF SOGI-FLL is the proposed technique. The control techniques of DSTATCOM have been compared in terms of load balancing, power factor enhancement, DC link voltage regulation and minimization of harmonics. These control techniques extract reference current for the PWM which generates switching pulses for the DSTATCOM. The complete H-bridge DSTATCOM system along with these control techniques have been implemented in MATLAB /Simulink platform and after execution, superior power quality features of proposed control technique has been investigated.

scholarly journals Power Quality Analysis of the Output Voltage of AC Voltage and Frequency Controllers Realized with Various Voltage Control Techniques

2021 ◽  
Vol 11 (2) ◽  
pp. 538
Author(s):  
Naveed Ashraf ◽  
Ghulam Abbas ◽  
Rabeh Abbassi ◽  
Houssem Jerbi
Keyword(s):  
Power Quality ◽  
Output Voltage ◽  
Frequency Control ◽  
Voltage Control ◽  
Voltage Regulation ◽  
Quality Analysis ◽  
Control Technique ◽  
Control Techniques ◽  
Power Quality Analysis ◽  
Selection Of

Single-phase and three-phase AC-AC converters are employed in variable speed drive, induction heating systems, and grid voltage compensation. They are direct frequency and voltage controllers having no intermediate power conversion stage. The frequency controllers govern the output frequency (low or high) in discrete steps as per the requirements. The voltage controllers only regulate the RMS value of the output voltage. The output voltage regulation is achieved on the basis of the various voltage control techniques such as phase-angle, on-off cycle, and pulse-width modulation (PWM) control. The power quality of the output voltage is directly linked with its control techniques. Voltage controllers implemented with a simple control technique have large harmonics in their output voltage. Different control techniques have various harmonics profiles in the spectrum of the output voltage. Traditionally, the evaluation of power quality concerns is based on the simulation platform. The validity of the simulated values depends on the selection of the period of a waveform. Any deficiency in the selection of the period leads to incorrect results. A mathematical analytical approach can tackle this issue. This becomes important to analytically analyze the harmonious contents generated by various switching control algorithms for the output voltage so that these results can be successfully used for power quality analysis and filtering of harmonics components through various harmonics suppression techniques. Therefore, this research is focused on the analytical computation of the harmonics coefficients in the output voltage realized through the various voltage and frequency control techniques. The mathematically computed results are validated with the simulation and experimental results.

scholarly journals Power Quality Investigation by Reduced Switching UPQC

2020 ◽  
Vol 22 (4-5) ◽  
pp. 335-347
Author(s):  
Pradeep Kumar
Keyword(s):  
Power Quality ◽  
Reference Frame ◽  
Unit Vector ◽  
Frame Theory ◽  
Control Technique ◽  
Control Techniques ◽  
Switching Losses ◽  
Synchronous Reference Frame

In this paper, nine switches UPQC topology with different control techniques have been depicted and compared their performances to accomplish clear inspection of the best control techniques. As conventional UPQC having twelve switches of six legs enhances the switching losses, circuit complication, costly etc. Hence nine switches UPQC topology is intended to reduce the switching losses, complexity, size and cost. This proposed topology has only three legs with three switches in each leg making total number of nine switches. The three control techniques such as Unit vector template, PQ theory and Synchronous reference frame theory have been employed in the nine switch UPQC topology. The simulation has been carried out separately for each control technique in MATLAB/SIMPOWER environment and results have been verified for higher efficiency of nine switch UPQC topology. The comparative THD of source currents and load voltages under these control techniques have been analysed. The obtained THD values are below 5% as per IEEE-519 standard.

scholarly journals Performance evaluation of different configurations of system with DSTATCOM using proposed Icos⁡ϕ technique

2022 ◽  
Vol 25 (1) ◽  
pp. 1
Author(s):  
Atma Ram ◽  
Parsh Ram Sharma ◽  
Rajesh Kumar Ahuja
Keyword(s):  
Quality Improvement ◽  
Power Quality ◽  
Dynamic Condition ◽  
Voltage Regulation ◽  
Control Technique ◽  
Harmonic Suppression ◽  
Power Quality Improvement ◽  
Non Linear Load ◽  
Static Compensator ◽  
And Control

The proposed Icos⁡ϕ control technique has been applied for power quality improvement using different configurations of system with distribution static compensator (DSTATCOM). Modeling, design and control of DSTATCOM are analysed in detial. Three phase reference current are extracted with this technique. The proposed technique has been used for power factor enhancement, voltage regulation, harmonic suppression and load balancing under dynamic condition with non-linear load. The proposed control is very effective for three different configurations of system with DSTATCOM for power quality improvement. Results for each configuration of system with DSTATCOM are simulated using MATLAB/Simulink sim power tool box. For teaching the power quality course, these can also be helpful.

Simulation and power quality analysis of a Loose-Coupled bipolar DC microgrid in an office building

2021 ◽  
Vol 303 ◽  
pp. 117606
Author(s):  
Ruiting Wang ◽  
Wei Feng ◽  
Huijie Xue ◽  
Daniel Gerber ◽  
Yutong Li ◽  
...  
Keyword(s):  
Power Quality ◽  
Office Building ◽  
Quality Analysis ◽  
Dc Microgrid ◽  
Power Quality Analysis

Design of Power Quality Management Software Based on Virtual Instrument and Oracle

2013 ◽  
Vol 427-429 ◽  
pp. 2441-2444
Author(s):  
Wei Chen ◽  
Long Chen ◽  
Ming Li
Keyword(s):  
Power Quality ◽  
Software Design ◽  
Virtual Instrument ◽  
Quality Analysis ◽  
Quality Data ◽  
Data Handling ◽  
Data Display ◽  
Report Generation ◽  
Management Capacity ◽  
Power Quality Analysis

This paper presents a software design useful for power quality analysis and data management. The software was programmed in LabVIEW and Oracle, running on Windows in a regular PC. LabVIEW acquires data continuously from the lower machine via TCP/IP. Using its database connection toolkit, LabVIEW accesses to Oracle to stores and retrieve the power quality data according to different indicators. A friendly GUI was built for data display and user operation, taking advantage of the powerful data-handling capacity of LabVIEW and its rich controls. Moreover, Excel reports can be exported using report generation toolkit in LabVIEW. The software greatly improves the data analysis and management capacity.

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