scholarly journals Recent Advances of STATCOM in Power Transmission Lines – A Review

2021 ◽  
Vol 12 (3) ◽  
pp. 4621-4626
Author(s):  
Mr. L NarayanaGadupudi Et.al
Keyword(s):  
Transmission Lines ◽  
Reactive Power ◽  
Power Transmission ◽  
Frequency Control ◽  
Harmonic Distortion ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Switching Frequency ◽  
Power Transmission Lines ◽  
Switching Losses

 Internal Liability of power system transmission lines influenced by the turbulences owing to catastrophic disasters. In order to achieve Constant Voltage Stability at both ends of the transmission lines, Static Synchronous Compensator (STATCOM) is imperative.  Voltage source Converter mechanisms augment with switching frequency control methodologies are widely adopted to regulate the reactive power. By deliberating IEEE Standards, the minimization of Total Harmonic Distortion (THD) is conceivable with STATCOM. This paper depicts the advancement of VSC based STATCOM approaches and the methodologies to minimize the switching losses. Economical management of High-Power ratings systems is also discussed in this paper

scholarly journals Distribution system power quality compensation using a HSeAPF based on SRF and SMC features

2021 ◽  
Author(s):  
Akram Qashou ◽  
Sufian Yousef ◽  
Abdallah A. Smadi ◽  
Amani A. AlOmari
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Reactive Power ◽  
Sliding Mode ◽  
Distribution Network ◽  
Harmonic Distortion ◽  
Phase Locked Loop ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Non Linear

AbstractThe purpose of this paper is to describe the design of a Hybrid Series Active Power Filter (HSeAPF) system to improve the quality of power on three-phase power distribution grids. The system controls are comprise of Pulse Width Modulation (PWM) based on the Synchronous Reference Frame (SRF) theory, and supported by Phase Locked Loop (PLL) for generating the switching pulses to control a Voltage Source Converter (VSC). The DC link voltage is controlled by Non-Linear Sliding Mode Control (SMC) for faster response and to ensure that it is maintained at a constant value. When this voltage is compared with Proportional Integral (PI), then the improvements made can be shown. The function of HSeAPF control is to eliminate voltage fluctuations, voltage swell/sag, and prevent voltage/current harmonics are produced by both non-linear loads and small inverters connected to the distribution network. A digital Phase Locked Loop that generates frequencies and an oscillating phase-locked output signal controls the voltage. The results from the simulation indicate that the HSeAPF can effectively suppress the dynamic and harmonic reactive power compensation system. Also, the distribution network has a low Total Harmonic Distortion (< 5%), demonstrating that the designed system is efficient, which is an essential requirement when it comes to the IEEE-519 and IEC 61,000–3-6 standards.

Adaptive SRF-PLL Based Voltage and Frequency Control of Hybrid Standalone WECS with PMSG-BESS

2018 ◽  
Vol 19 (6) ◽  
Author(s):  
Anjana Jain ◽  
R. Saravanakumar ◽  
S. Shankar ◽  
V. Vanitha
Keyword(s):  
Reactive Power ◽  
Frequency Control ◽  
Storage System ◽  
Synchronous Generator ◽  
Energy Storage System ◽  
Voltage Regulation ◽  
Operating Conditions ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Control Scheme

Abstract The variable-speed Permanent Magnet Synchronous Generator (PMSG) based Wind Energy Conversion System (WECS) attracts the maximum power from wind, but voltage-regulation and frequency-control of the system in standalone operation is a challenging task A modern-control-based-tracking of power from wind for its best utilization is proposed in this paper for standalone PMSG based hybrid-WECS comprising Battery Energy Storage System (BESS). An Adaptive Synchronous Reference Frame Phase-Locked-Loop (SRF-PLL) based control scheme for load side bi-directional voltage source converter (VSC) is presented for the system. MATLAB/Simulink model is developed for simulation study for the proposed system and the effectiveness of the controller for bi-directional-converter is discussed under different operating conditions: like variable wind-velocity, sudden load variation, and load unbalancing. Converter control scheme enhances the power smoothening, supply-load power-matching. Also it is able to regulate the active & reactive power from PMSG-BESS hybrid system with control of fluctuations in voltage & frequency with respect to varying operating conditions. Proposed controller successfully offers reactive-power-compensation, harmonics-reduction, and power-balancing. The proposed scheme is based on proportional & integral (PI) controller. Also system is experimentally validated in the laboratory-environment and results are presented here.

scholarly journals Investigation characteristics of partial discharges in artificial defects of power transmission lines

2020 ◽  
pp. 63-68
Author(s):  
D. A. Polyakov ◽  
◽  
N. A. Tereschenko ◽  
I. V. Komarov ◽  
K. I. Nikitin ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Power Transmission ◽  
Phase Distribution ◽  
Partial Discharges ◽  
Power Lines ◽  
Voltage Source ◽  
Power Transmission Lines ◽  
Average Value ◽  
Cable Lines ◽  
Overhead Power Lines

The article describes the study of the characteristics of partial discharges (PD) in various types of artificial defects in cable lines. A total of 13 types of insulation defects are considered. The PD measurements are carried out using a high AC voltage source and a commercial PD recorder. For each type of defect, diagrams of the amplitude-phase distribution of PD (APDPD), the average value of the apparent discharge, and the PD intensity are obtained. The results of the study show that most of the defects of insulators of overhead power lines have a relatively high intensity of partial discharges with a small average apparent charge. In the samples of cable lines, relatively high values of intensity and average apparent discharge are recorded in the presence of a defect in the end seal and a defect in the ground electrode in the form of a needle. The results obtained can be used in the development of devices for detecting defects, as well as for expanding the base of diagrams (APDPD)

scholarly journals Induction drive system with DSTATCOM based asymmetric twin converter

2020 ◽  
Vol 11 (4) ◽  
pp. 1826
Author(s):  
P Anusha ◽  
B V Rajanna
Keyword(s):  
High Power ◽  
Harmonic Distortion ◽  
Control Technique ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Switching Frequency ◽  
Power Electronics Converters ◽  
Drive Control ◽  
In Series ◽  
Output Module

High power demands are usually met by advanced power electronics converters in several large utility and electric drives applications. Applications from high power drives commonly uses solution based multi pulse and multilevel converters. A common DC link with atleast one voltage source converter (VSC) working with almost fundamental switching frequency are used in converters of multipulse type, and each output module is connected with the multipulse transformer in series. When compared to that of solution with single-VSC, Several VSCs generating different triggering pulses are adjused in order to achieve current injected with low specified total harmonic distortion (THD) with losses of abridged switching. Huge structure in complexity and expensive cost expenditure of the multipulse transformer is the major limitation of this scheme. DC link split capacitors in addition are eliminated by modifying the topology of the circuit. Thus, the independent voltages of the DC capacitor are controlled and decreased in number and the flow of third harmonic current component in the transformer is eliminated. The scheme of the designed controller is depending on the derived mathematical system model. Simulaion observation is used to check the scheme performance and efficiency in a detailed way with drive control technique.

scholarly journals The Performance of the BTB-VSC for Active Power Balancing, Reactive Power Compensation and Current Harmonic Filtering in the Interconnected Systems

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 831 ◽  
Author(s):  
Janeth Alcalá ◽  
Víctor Cárdenas ◽  
Alejandro Aganza ◽  
Jorge Gudiño-Lau ◽  
Saida Charre
Keyword(s):  
Reactive Power ◽  
Harmonic Distortion ◽  
Reactive Power Compensation ◽  
Active Power ◽  
Performance Criteria ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Current Harmonics ◽  
Current Harmonic ◽  
Harmonic Filtering

Nowadays, the use of power converters to control active and reactive power in AC–AC grid-connected systems has increased. With respect to indirect AC–AC converters, the tendency is to enable the back-to-back (BTB) voltage source converter (VSC) as an active power filter (APF) to compensate current harmonics. Most of the reported works use the BTB-VSC as an auxiliary topology that, combined with other topologies, is capable of active power regulation, reactive power compensation and current harmonic filtering. With the analysis presented in this work, the framework of the dynamics associated with the control loops is established and it is demonstrated that BTB-VSC can perform the three tasks for which, in the reviewed literature, at least two different topologies are reported. The proposed analysis works to support the performance criteria of the BTB-VSC when it executes the three control actions simultaneously and the total current harmonic distortion is reduced from 27.21% to 6.16% with the selected control strategy.

scholarly journals Active Power Filtering Embedded in the Frequency Control of an Offshore Wind Farm Connected to a Diode-Rectifier-Based HVDC Link

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2718 ◽  
Author(s):  
Ashkan Nami ◽  
José Amenedo ◽  
Santiago Gómez ◽  
Miguel Álvarez
Keyword(s):  
Wind Farm ◽  
Frequency Control ◽  
Harmonic Distortion ◽  
Active Power ◽  
Offshore Wind ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Offshore Wind Farm ◽  
Harmonic Compensation ◽  
Dynamic Phasor

This paper presents a novel active power filtering (APF) scheme embedded in a centralised frequency control of an offshore wind farm (OWF) connected to a high voltage direct current link through a diode rectifier station. The APF is carried out by a voltage source converter (VSC), which is connected to the rectifier station to provide frequency control for the offshore ac-grid. The proposed APF scheme eliminates harmonic currents at a capacitor bank placed at the rectifier station. This leads to a significant reduction in the total harmonic distortion of the offshore ac-grid voltage, and thus, to an improvement in the OWF power. Hence, the rectifier passive ac-filter bank is not needed anymore. A new selective harmonic compensation method based on the dynamic phasor (DP) theory is used in the proposed APF scheme which allows the extraction of the phasor form of harmonics in dc-signals. Therefore, the well-known proportional-integral regulators are used for the harmonic current compensation. Moreover, the offshore ac-grid is modelled for the system harmonic analysis using a grid solution based on the DP theory. Finally, a VSC power rating analysis is studied. The performance of the proposal is validated by simulations in both steady-state and transient conditions.

Decoupled Control Strategy of Grid Interactive Inverter System with Optimal LCL Filter Design

2013 ◽  
Vol 14 (5) ◽  
pp. 477-486 ◽  
Author(s):  
B. Chitti Babu ◽  
Anup Anurag ◽  
Tontepu Sowmya ◽  
Debati Marandi ◽  
Satarupa Bal
Keyword(s):  
Control Strategy ◽  
Reactive Power ◽  
Filter Design ◽  
Dynamic Performance ◽  
Harmonic Distortion ◽  
Voltage Source ◽  
Lcl Filter ◽  
Current Harmonics ◽  
Switching Losses ◽  
Active And Reactive Power

Abstract This article presents a control strategy for a three-phase grid interactive voltage source inverter that links a renewable energy source to the utility grid through a LCL-type filter. An optimized LCL-type filter has been designed and modeled so as to reduce the current harmonics in the grid, considering the conduction and switching losses at constant modulation index (Ma). The control strategy adopted here decouples the active and reactive power loops, thus achieving desirable performance with independent control of active and reactive power injected into the grid. The startup transients can also be controlled by the implementation of this proposed control strategy: in addition to this, optimal LCL filter with lesser conduction and switching copper losses as well as core losses. A trade-off has been made between the total losses in the LCL filter and the Total Harmonic Distortion (THD%) of the grid current, and the filter inductor has been designed accordingly. In order to study the dynamic performance of the system and to confirm the analytical results, the models are simulated in the MATLAB/Simulink environment, and the results are analyzed.

scholarly journals Leaky-momentum control algorithm for voltage and frequency control of three-phase SEIG feeding isolated load

2021 ◽  
Author(s):  
Duli Chand Meena ◽  
◽  
Madhusudan Singh ◽  
Ashutosh K. Giri ◽  
◽  
...  
Keyword(s):  
Control Algorithm ◽  
Reactive Power ◽  
Frequency Control ◽  
Storage System ◽  
Operating Conditions ◽  
Control Technique ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Nonlinear Load ◽  
Three Phase

This paper dealt the implementation of a Leaky-Momentum Control Algorithm (LMA) for controlling a voltage source converter (VSC) to enhance the power quality of a three-phase self-excited induction generator (SEIG) used in a distributed generating system. This LMA technique operates the VSC to regulate voltage and frequency of SEIG within a permissible limit. The LMA control is implemented to reduce the higher demand of reactive power, harmonics distortions and balancing of loads under different operating conditions. During the electrical and mechanical dynamical conditions, the LMA technique is maintaining a constant voltage and frequency at point of common coupling (PCC). The proposed technique is a modified control technique of basic Leaky and Momentum Algorithms. This control has removed the drawbacks of Leaky and momentum algorithms. Moreover, it is observed that LMA performs better when there are uncertainties in input conditions. The whole system comprising SEIG, nonlinear load, voltage source converter and battery storage system is made in MATLAB /SIMULINK. It has shown promising performance under both dynamical state and steady state of the system.

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