scholarly journals DSTATCOM Performance for Voltage Sag/swell Mitigation

2020 ◽  
Vol 9 (2) ◽  
pp. 71-74
Keyword(s):  
Power Quality ◽  
Power Distribution ◽  
Distribution System ◽  
Distribution Systems ◽  
Reactive Power ◽  
Power Transmission ◽  
Control Technique ◽  
Power Distribution System ◽  
Industrial Sectors ◽  
Voltage Compensation

The Indian economy has been growing at a fast pace since the beginning of this millennium. Due to constraints in the availability of fuel and environmental concerns, the power generation sector has not kept pace with other industrial sectors. One way of increasing the power availability is by reducing the high losses in the existing power transmission and distribution systems. The current increases in the motor windings when the voltages in the three phases are unbalanced. Compensation for reactive power and unbalance in the power distribution system are key factors in improving the power quality to the end user. A Distributed Static Compensator [DSTATCOM] is a custom power device, which is connected in shunt with the load in the distribution system to compensate the reactive power due unbalanced loads. The performance of the DSTATCOM is based on the control technique used for finding the voltage referred and current components to be considered. Voltage compensation is defined as the error in voltage in the grid and that the value of voltage that has to be induced in the grid. This is analyzed by using DSTATCOM for voltage compensation with series converter controller block. This paper gives the simulation of voltage compensation to rectify the issue of voltage swell/sag in order to improve the power quality in the distribution system.

scholarly journals Combined Operation of AC and DC Distribution System with Distributed Generation Units

2010 ◽  
Vol 61 (4) ◽  
pp. 193-204 ◽  
Author(s):  
Reza Noroozian ◽  
Mehrdad Abedi ◽  
Gevorg Gharehpetian
Keyword(s):  
Power Quality ◽  
Distributed Generation ◽  
Power Distribution ◽  
Distribution System ◽  
Distribution Systems ◽  
Control Technique ◽  
Power Distribution System ◽  
Dc Distribution ◽  
Combined Operation ◽  
Ac Systems

Combined Operation of AC and DC Distribution System with Distributed Generation Units This paper presents a DC distribution system which has been supplied by external AC systems as well as local DG units in order to demonstrate an overall solution to power quality issue. In this paper, the proposed operation method is demonstrated by simulation of power transfer between external AC systems, DG units, AC and DC loads. The power flow control in DC distribution system has been achieved by network converters and DG converters. Also, the mathematical model of the network, DG and load converters are obtained by using the average technique, which allows converter systems accurately simulated and control strategies for this converters is achieved. A suitable control strategy for network converters has been proposed that involves DC voltage droop regulator and novel instantaneous power regulation scheme. Also, a novel control technique has been proposed for DG converters. In this paper, a novel control system based on stationary and synchronously rotating reference frame has been proposed for load converters for supplying AC loads connected to the DC bus by balanced voltages. The several case studies have been studied based on proposed methods. The simulation results show that DC distribution systems including DG units can improve the power quality at the point of common coupling (PCC) in the power distribution system or industrial power system.

Performance of PI Controller Based Dynamic Voltage Restorer for Power Quality Improvement

2016 ◽  
Vol 818 ◽  
pp. 52-57 ◽  
Author(s):  
Faridullah Kakar ◽  
Abdullah Asuhaimi bin Mohd Zin ◽  
Mohd Hafiz bin Habibuddin
Keyword(s):  
Power Quality ◽  
Power Distribution ◽  
Distribution System ◽  
Control Technique ◽  
Voltage Sag ◽  
Pi Control ◽  
Dynamic Voltage Restorer ◽  
Power Distribution System ◽  
Voltage Restorer ◽  
Dynamic Voltage

Voltage sag and harmonics are the most frequent power quality problems faced by industrial and commercial customers today. Situation has been aggravated by modern sensitive industrial equipments which introduce system harmonics due to their inherent V-I characteristics. In this paper, proportional integral (PI) control technique based dynamic voltage restorer (DVR) is implemented in power distribution system to suppress voltage sag and harmonics under linear, non-linear and induction motor load conditions. Real-time power distribution system and DVR test models are built in Matlab/Simulink software. Simulation results exhibit excellent PI control approach with effective performance yielding excellent voltage regulation.

scholarly journals Multilevel diode clamped D-Statcom for power quality improvement in distribution systems

2021 ◽  
Vol 12 (1) ◽  
pp. 217
Author(s):  
Jasti Venkata Ramesh Babu ◽  
Malligunta Kiran Kumar
Keyword(s):  
Power Quality ◽  
Power Distribution ◽  
Distribution System ◽  
Distribution Systems ◽  
Electrical Power ◽  
Reference Signal ◽  
Power Distribution System ◽  
Received Power ◽  
Multi Level ◽  
Result Analysis

Power quality is one big issue in power system and a big challenge for power engineers today. Electrical consumers (or otherwise load devices) expect electrical power received power should be of first-class. Bad quality in electrical power directs to fuse blowing, machine overheating, increase in distribution losses, damage to sensitive load devices and many more. DSTATCOM is one of the FACTS controllers designed to improve the quality in electrical power and thus improving the performance of distribution system. This paper presents a multilevel DSTATCOM topology to enhance power quality in power distribution system delivering high-quality power to the customer load devices. Diode-clamped structure is employed for multi-level DSTATCOM structure. ‘PQ’ based control strategy generates reference signal which is further processed through level-shifted multi-carrier PWM strategy for the generation of gate pulses to multi-level DSTATCOM structure. Simulation work of proposed system is developed and the result analysis is presented using MATLAB/SIMULINK software. Performance of multi-level DSTATCOM topology is verified with fixed and variable loads.

scholarly journals Performances Analysis on Power Quality Problems Mitigation by using Unified Power Quality Conditioner (UPQC)

2019 ◽  
Vol 3 (2) ◽  
Author(s):  
May Phone Thit
Keyword(s):  
Power Quality ◽  
Power Distribution ◽  
Distribution System ◽  
Distribution Systems ◽  
Maximum Load ◽  
Dynamic Voltage Restorer ◽  
Power Distribution System ◽  
System A ◽  
Unified Power Quality Conditioner ◽  
Power Quality Conditioner

Nowadays, power quality is one of the major problems in electric power distribution system. The poor power quality at distribution level can affect the operation and performance of sensitive and critical loads. In the distribution systems, poor power quality results in various problems such as higher power losses, harmonics, sag and swells in the voltage, and poor power factor., etc. Unified Power Quality Conditioner (UPQC) is the only versatile device which can mitigate several power quality problems related with distribution system. A UPQC that combines the operations of a Distribution Static Compensator (D-STATCOM) and Dynamic Voltage Restorer (DVR) together with the shunt and series active control devices. UPQC can solve the problems related to the voltage/current harmonics, voltage sag/swell and unbalance in distribution system. To evaluate the performance improvement in the system, a model of UPQC is developed in MATLAB/SIMULINK with a typical distribution network. In this research, UPQC is applied for power quality enhancement of Myaungtagar industrial distribution substation, Myanmar. Enhancements in power quality by UPQC are evaluated under maximum load condition.Keywords—Power Quality, UPQC, Series Controller, Shunt controller, Harmonics

Mitigation of Voltage Fluctuation in Power Distribution System Using D-STATCOM

2016 ◽  
Vol 2 (3) ◽  
pp. 530
Author(s):  
Yahia M Esmail ◽  
S K Elsayed ◽  
M A Mehanna
Keyword(s):  
Power Quality ◽  
Power Distribution ◽  
Distribution System ◽  
Electrical Power ◽  
Test System ◽  
Control Technique ◽  
Production Environment ◽  
Major Power ◽  
Voltage Fluctuations ◽  
Power Distribution System

<p class="DefaultParagraphFont1" align="center"> </p><p align="center"><strong><em>Abstract</em></strong></p><p><em>         Electrical Power Quality is becoming intensity concerned from both electric utilities and customers. Voltage Fluctuations is a major power quality problem as it has a significant impact on both the equipment and production environment. This work describes the voltage control technique of mitigation of voltage fluctuations and clearing fault using Distribution Static Synchronous Compensator (DSTATCOM). The test system used is IEEE 9-bus distribution system clarified optimal location of DSTATCOM by using Artificial Neural Network (ANN). A simulation was done using MATLAB/Simulink software to obtain the results..</em></p><p> </p>

scholarly journals Application of Fuzzy Controller for Improvement of Power Quality using UPQC

2020 ◽  
pp. 27-30
Author(s):  
Kundeti Krishna Rao , M Sonia
Keyword(s):  
Power Quality ◽  
Power Distribution ◽  
Distribution System ◽  
Distribution Systems ◽  
Fuzzy Logic Controller ◽  
Fuzzy Controller ◽  
Active Filters ◽  
Voltage Source ◽  
Shunt Active Filter ◽  
Power Distribution System

Generally, one of the custom power device in FACTS called unified power quality conditioner, which is used to compensate the voltage and current-related Power Quality issues in the distribution systems. The proposed UPQC technology have an advantage of reduced dc-link voltage without compromising its compensation capability. This new method also helps to meet the requirement of dc-link voltage for the shunt and series active filters of the UPQC. This type of topology has a capacitor in series with the interfacing inductor across the shunt active filter for filtering purpose, and the system neutral is also considered and directly connected to neutral of distribution system avoid the requirement of the fourth leg in the voltage source inverter. This paper also presents a concept for improving power quality of a power distribution system such as an FUZZY logic controller along with the UPQC control strategy. The simulation results are compared for both conventional PI controller and FUZZY controller.

scholarly journals A Generalized Model and Control forSupermagnetic and Supercapacitor EnergyStorage

2017 ◽  
Vol 13 (26) ◽  
pp. 147-171 ◽  
Author(s):  
Walter Julián Gil González ◽  
Alejandro Garcés ◽  
Andrés Escobar
Keyword(s):  
Energy Storage ◽  
Power Distribution ◽  
Distribution System ◽  
Distribution Systems ◽  
Reactive Power ◽  
Magnetic Energy ◽  
Current Source ◽  
Space Representation ◽  
Power Distribution System ◽  
Electrical Distribution

This paper presents a generalized linear model based on LMI state-feedbackwith integral action, applicable to the control of Electric Energy Stora-ge Systems (EESS) such as Superconducting Magnetic Energy Storage(SMES) and Supercapacitor Energy Storage (SCES). A Voltage SourceConverter (VSC) and a Pulse-Width modulated Current Source Converter(PWM-CSC) are respectively used to integrate the SCES and the SMESsystems to the electrical distribution system. To represent the dynamicsbetween the EESS and the power distribution system a reduced generallinear model in the state-space representation is introduced. The proposedcontrol scheme regulates independently the active and reactive power flowbetween the EESS and ac the grid. Three case scenarios comparing a con-ventional PI controller and the proposed technique are conducted conside-ring grid voltage fluctuations. Extensive time-domain simulations demons-trate the robustness and proper performance of the proposed controller to operate the EESS as power compensator, in order to improve the operativeconditions of electrical distribution systems.

scholarly journals Power Quality Enhancement Using DSTATCOM in Industry Plants

2020 ◽  
Vol 5 (1) ◽  
pp. 157-175
Author(s):  
Atinkut Bayu
Keyword(s):  
Power Quality ◽  
Power Factor ◽  
Power Distribution ◽  
Distribution System ◽  
Reactive Power ◽  
Harmonic Distortion ◽  
Power Distribution System ◽  
Load Voltage ◽  
Voltage Unbalance

AbstractThis paper is focused on increasing the power quality of Unique Macaroni factory, located in Bahir Dar Town. Necessary data have been collected from the factory and the collected data are analysed. Based on the analysis of data, it is found that the factory working power factor is low and hovering around 0.7125. Voltage variations are up to 9.09%, average voltage unbalance is 2.2% and total harmonic distortion (THD) of load currents and voltage are 24.17% and 10.16%, respectively. Harmonic components have existed in the power distribution system of the factory. Based on the analysis of power quality problem in the factory, distribution static compensator (DSTATCOM) and its control system have been designed to boost power quality of the factory and the results are obtained by generating simulations using Matlab software. It is observed from outputs of the Matlab simulations that DSTATCOM can improve the power quality of the factory. Generally, the shape of the waveform of load voltage and current is improved and THD level of load voltage is minimised to 1.55% and load current THD level is 7.09%. The reactive power needed by the loads (442 kVAr) is almost provided by the DSTATCOM, so reactive power from source supply is very small such as 22 kVAr so that the power factor of the source tends to unity.

scholarly journals Optimal Energy Management Framework for Truck-Mounted Mobile Charging Stations Considering Power Distribution System Operating Conditions

Sensors ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 2798
Author(s):  
Soi Jeon ◽  
Dae-Hyun Choi
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Distribution Systems ◽  
Reactive Power ◽  
Power Grid ◽  
Operating Conditions ◽  
Power Distribution Systems ◽  
Power Distribution System ◽  
Charging Station ◽  
Power Capability

A high charging demand from many electric vehicles (EVs) at a fixed charging station (FCS) with a limited number of charging poles can increase the waiting time of EVs and yield an abnormal power grid condition. To resolve these challenges, this paper presents an optimization framework in which a mobile charging station (MCS) is dispatched to the overloaded FCS to reduce the number of waiting EVs while maintaining normal power grid operation. Compared to existing MCS scheduling methods that do not consider actual power distribution system operations, the proposed framework takes into account the (i) active/reactive power flow and consumption of EVs, (ii) reactive power capability of MCS, and (iii) voltage quality in power distribution systems. In coupled transportation and power distribution systems, the proposed algorithm conducts optimal operation scheduling of MCS for both road routing and charging and discharging, thereby leading to the reduction of waiting EVs within the allowable voltage range. The proposed MCS optimization algorithm was tested in IEEE 13-bus and 33-bus distribution systems coupled with 9-node and 15-node transportation systems, respectively. The test results demonstrate the effectiveness of the proposed algorithm in terms of number of waiting EVs, voltage magnitude deviation, and reactive power of the MCS.

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