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>

Shunt Petersen-Coil with Resistor for Single Phase Fault Detection in Resonant Grounded Power Distribution Systems

2013 ◽  
Vol 860-863 ◽  
pp. 2007-2012 ◽  
Author(s):  
Xiao Meng ◽  
Neng Ling Tai ◽  
Yan Hu ◽  
Xia Yang
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Distribution Systems ◽  
Single Phase ◽  
Detection Sensitivity ◽  
Power Distribution Systems ◽  
Power Distribution System ◽  
Multi Level ◽  
The Difference ◽  
Petersen Coil

The failure current in resonant grounder power distribution system is small, so it is difficult to detect the fault feeder. This passage presents the equivalent circuit of resonant grounded system, and discusses the difference of electrical characteristics between faulty feeder and sound feeders by using shunt resistors. To reduce the influence of shunt resistors on the system and improve the detection sensitivity, it presents the method of shunting multi-level resistors, and it proves the sensitivity and reliability of this method by EMTP simulation.

SOGI Algorithm-Based Shunt Active Power Filter for Grid Integration of Photovoltaic Systems

2016 ◽  
Vol 25 (05) ◽  
pp. 1650046 ◽  
Author(s):  
P. Manimekalai ◽  
R. Harikumar ◽  
S. Raghavan
Keyword(s):  
Distribution System ◽  
Single Phase ◽  
Phase Distribution ◽  
Active Power Filter ◽  
Active Power ◽  
Small Scale ◽  
Reference Source ◽  
Pv System ◽  
Shunt Active Power Filter ◽  
Power Filter

In this paper, photovoltaic (PV) system interfaced single-phase shunt active power filter (SAPF) is proposed to supply uninterrupted and clean power to small-scale industries and domestic customers. The second-order generalized integrator (SOGI) is employed to extract the reference current of PV-SAPF. The proposed topology does not need voltage measurement and sensors on both the AC and DC side, just two current sensors are accustomed to measure converter and load currents. To be able to acquire an accurate reference source current, the distorted load is only processed through the SOGI control algorithm which does not need voltage-related information. The PV interfaced SAPF mainly is used for sustainable compensation of current disturbances and voltage interruption of the single-phase distribution system. The proposed topology utilizes the PV energy with an energy storage unit to meet the active power requirement of the utility grid. Besides, it exports the power generated in the PV system to the load during unavailability of grid supply. The PV-SAPF system subject to different types of loads can assess the performance of the system under steady-state and dynamic conditions. To validate the effectiveness of the proposed controller for PV interfaced SAPF, the simulation and experimental results are presented.

scholarly journals Power Quality Improvement using UPQC with Single and Three-Phase Non-linear Loads in Countryside Areas

2019 ◽  
Vol 9 (4) ◽  
pp. 18-24
Author(s):  
Shuchi Vishnoi ◽  
Keyword(s):  
Power Quality ◽  
Distribution System ◽  
Single Phase ◽  
Phase Distribution ◽  
Control Strategies ◽  
Electrical Power ◽  
Synchronous Reference Frame ◽  
Three Phase ◽  
Non Linear ◽  
Distribution Grids

This paper is intended to simulate a power quality conditioning device, Unified Power Quality Conditioner (UPQC), in countryside areas for non-linear loading. From past decades there is much increase in the requirement of the good quality electrical power in single phase distribution grids established in these locations. Due to technical advancement, three-phase loads are practiced more than single phase loads so that the demand for three phase distribution grids is growing. But the installation process of three-phase grids, at countryside areas, is not an economic option and to get access to these systems is a very challenging task. So a neighbouring three-phase distribution system is required to be established at the location, where single-phase to three-phase UPQC with single wire earth return is appropriate for the end user due to economic considerations. A dual compensation strategy is implemented to obtain the reference quantities for controlling the converters. The proposed idea is accomplished to eliminate voltage harmonics and mitigate further instabilities and power quality problems. This system allows the balanced and regulated voltage with lower harmonic content. Synchronous Reference Frame (SRF) based controllers are considered to organize the input grid current and the load voltages of the UPQC. The present prototype under consideration analyses and validates the compensation and controlling techniques using PI controller. The control strategies are simulated using MATLAB/SIMULINK.

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