Impact of distributed generation penetration on grid current harmonics considering non-linear loads

2012 ◽  
Author(s):  
V. Khadkikar ◽  
R. K. Varma ◽  
R. Seethapathy ◽  
A. Chandra ◽  
H. Zeineldin
Keyword(s):  
Distributed Generation ◽  
Current Harmonics ◽  
Grid Current ◽  
Non Linear

scholarly journals Synchronized Control of Voltage and Current Harmonics in Distributed Generation System using Fuzzy Controller

2019 ◽  
Vol 8 (12) ◽  
pp. 1179-1182
Keyword(s):  
Distributed Generation ◽  
Energy Demand ◽  
Power Flow ◽  
Fuzzy Controller ◽  
Low Voltage ◽  
Load Condition ◽  
Control Technique ◽  
Current Harmonics ◽  
Simultaneous Control ◽  
Unbalanced Load

The worldwide energy demand is increasing due to increase in population and economic growth. The grid is gradually replaced by Distributed generation systems (DGs). Recently low voltage DG interfacing converter on the non linear load compensation is performed by unified power flow converter. The proposed control technique is analyzed for Simultaneous control of voltage and power under unbalanced load condition using MATLAB/SIMULINK software

scholarly journals Effect of load current harmonics on vibration of three-phase generator

2018 ◽  
Vol 197 ◽  
pp. 11023
Author(s):  
I Made Wiwit Kastawan
Keyword(s):  
Single Phase ◽  
Electrical Power ◽  
Electrical Power System ◽  
Negative Effects ◽  
Load Current ◽  
Current Harmonics ◽  
Three Phase ◽  
Non Linear ◽  
Electrical Loads ◽  
Linear Loading

Almost all today electrical loads are considered non-linear such as switch mode power supply (SMPS) for powering computer and mobile phone or variable speed drive (VSD) for driving home and industrial electric motors. These loads generate ac non-sinusoidal current containing a lot of harmonics as indicated by its high total harmonics distortion (THD) figure. Current harmonics bring negative effects into all electrical power system components, including three-phase generator. This paper provides analysis of load current harmonics effects on vibration of three-phase generator. Three different laboratory experiments have been conducted i.e. three-phase linear resistive loading, non-linear loading with a three-phase ac/dc converter and non-linear loading with three single-phase capacitor filtered ac/dc converters. Results show that the higher load current harmonics content the higher is vibration of the three-phase generator. Non-linear loading with a three-phase ac/dc converter that generate about 24.7% THD gives an increase of 4.3% and 5.5% in average of vertical and horizontal vibrations of the three-phase generator respectively. Further, non-linear loading with three single-phase capacitor filtered ac/dc converters that generate THD as high as 74.9% gives significant increase of 28.1% and 23.6% in average of vertical and horizontal vibrations respectively.

scholarly journals Control of Powers for Wind Power Generation and Grid Current Harmonics Filtering From Doubly Fed Induction Generator: Comparison of Two Strategies

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 32703-32713 ◽  
Author(s):  
Adson Bezerra Moreira ◽  
Tarcio Andre Dos Santos Barros ◽  
Vanessa Siqueira De Castro Teixeira ◽  
Ramon Rodrigues De Souza ◽  
Marcelo Vinicius De Paula ◽  
...  
Keyword(s):  
Power Generation ◽  
Wind Power ◽  
Wind Power Generation ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Current Harmonics ◽  
Grid Current ◽  
Doubly Fed ◽  
Generator Comparison

scholarly journals Simulation, Design, and Analysis of 3-Level Shunt Active Harmonic Filter using T-Typed NPC (TNPC) Topology

10.29007/s9ch ◽  
2018 ◽  
Author(s):  
Mitrajsinh Janaksinh Chudasama ◽  
Prof. Dr. P. N. Tekwani ◽  
Siddharthsingh K Chauhan ◽  
Vinod Patel
Keyword(s):  
Reactive Power ◽  
Simulation Design ◽  
Current Harmonics ◽  
Synchronous Reference Frame ◽  
Three Phase ◽  
Harmonic Filter ◽  
Non Linear ◽  
Point Of Common Coupling ◽  
Switched Mode Power Supply ◽  
Parallel Resonance

Power quality at the source side deteriorates due to current harmonics which are introduced in the power system by non-linear loads, originating a vital difficulty. Rectifiers, variable speed drive, switched mode power supply, etc. types of non-linear loads create such harmonics. Con- ventional technique to eliminate such harmonics is use of passive filters but this technique has the disadvantage of series and parallel resonance within the network impedance, overcompen- sation of reactive power at fundamental frequency and poor flexibility. Shunt Active Harmonic Filters (SAHF) are generally used to reduce current harmonics. The active harmonic filters introduce remunerating currents into the source to neutralize the harmonics possessed by the load current. The compensating currents will be derived by sensing three-phase voltages at the Point of Common Coupling (PCC) and load currents. Efforts are made in this study to ana- lyze Fast Fourier Transform (FFT) algorithm, Instantaneous Reactive Power (IRP) technique, and Synchronous Reference Frame (SRF) technique used to derive the reference compensating currents. These compensating currents act as reference currents for the fixed switching based current controllers which generate control signals for the SAHF employing three-level T-type Neutral Point Clamped (TNPC) topology of converter.

scholarly journals DSTATCOM for Harmonics Mitigation in 3-Phase 3-Wire Sytem

10.29007/nkxw ◽  
2018 ◽  
Author(s):  
Khoda N. Odedra ◽  
Saurabh Pandya ◽  
Dhaval Patel ◽  
Maheshwariba Zala
Keyword(s):  
Control Strategy ◽  
Distribution System ◽  
Distribution Systems ◽  
Current Problem ◽  
Power Electronic ◽  
Phase 3 ◽  
Load Current ◽  
Current Harmonics ◽  
Non Linear

Distribution systems have been facing serious problems of harmonics load current mainly due to advancement in power electronic based and other non-linear loads. The DSTATCOM has been widely used to mitigate the load current harmonics problems in distribution system. In this paper design and simulation of DSTATCOM with SRF Control Strategy is carried out with 3-phase 3-wire distribution system to mitigate the harmonics load current problem using MATLAB /SIMULIMK software.

scholarly journals Multi-Objective Service Restoration of Radial Distribution System in the Presence of Non-Linear Loads

Electronics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 369
Author(s):  
Ishan Srivastava ◽  
Sunil Bhat ◽  
Agarala Ajaysekhar Reddy
Keyword(s):  
Radial Distribution ◽  
Distribution System ◽  
Normal Operation ◽  
Power Network ◽  
Nsga Ii ◽  
Radial Distribution System ◽  
Current Harmonics ◽  
Multi Objective ◽  
Service Restoration ◽  
Non Linear

Most of the power electronic components act as non-linear loads because they draw non- sinusoidal current from the power supply. Due to these non-linear loads, current harmonics are injected in the power network. For normal operation, any power network is equipped with provisions to keep the harmonics level to a minimum value. Whenever a fault occurs in the distribution system, the primary goal is to re-energize the healthy part of the network which got interrupted. It can be done by changing the topology of the network. This method is called as Service Restoration (SR). In this paper, a service restoration strategy is proposed when non-linear loads are present in the radial distribution system. Service restoration problem is formulated as a multi-objective, constrained optimization problem. Three new objectives are included to address the problem of harmonics injection by non-linear loads. Multi-Objective Particle Swarm Optimization (MOPSO) and Non-Dominated Sorting Genetic Algorithm-II (NSGA-II) are used to find the optimal switching sequence for restoration. To test the effectiveness of the proposed methodology, IEEE 33 bus and IEEE 69 bus test systems are taken.

Sign in / Sign up

Export Citation Format

Share Document