Analysis of Power Flow in Grid-tied Voltage Source Inverter System

2020 ◽  
Vol 9 (9) ◽  
Keyword(s):  
Power Flow ◽  
Voltage Source ◽  
Voltage Source Inverter

Conversion System for Grid-to-Vehicle and Vehicle-to-Grid Applications

2019 ◽  
Vol 17 (1) ◽  
Author(s):  
Diogo Marinho ◽  
Miguel Chaves ◽  
Paulo Gambôa ◽  
José Lopes
Keyword(s):  
Power Flow ◽  
Energy Use ◽  
Power Grid ◽  
Storage System ◽  
Energy Storage System ◽  
Voltage Source ◽  
Voltage Source Inverter ◽  
Vehicle To Grid ◽  
Conversion System ◽  
Bidirectional Power Flow

Abstract The increasing use of electrical vehicles aroused the problem of batteries charging and the consequent interface with the power grid. Commercial charging solutions are mostly based on unidirectional power flow converters; however, bidirectional power flow converters are an interesting solution when considering smart microgrid applications, with benefits in efficient energy use. In this context, the paper presents a bidirectional power flow converter for grid-to-vehicle (G2V) or vehicle-to-grid (V2G) applications. The conversion system is based on a three-phase voltage source inverter (VSI), which assures the grid connection with a unitary power factor. The direct current (DC) bus of the voltage source inverter is connected to a DC/DC converter that controls the battery power flow. This conversion system can operate in G2V mode when charging the battery or in V2G mode when working as an energy storage system and the power flow is from the battery to the power grid. The conversion system model is presented as well as the control strategy proposed. Simulation and experimental results showing voltages and currents in the circuit are also presented.

A Flexible Power Flow Control of a Voltage Source Inverter for a Grid-Connected 100 Wp Solar PV Application

2021 ◽  
Author(s):  
Ferdian Ronilaya ◽  
Mahrus Hapidi ◽  
Sapto Wibowo ◽  
Ratna Ika Putri ◽  
Afifah Zuhroh ◽  
...  
Keyword(s):  
Flow Control ◽  
Power Flow ◽  
Voltage Source ◽  
Solar Pv ◽  
Voltage Source Inverter ◽  
Power Flow Control

Energy-Saving Reversible Electric Drive Based on Active Front End Rectifier and Voltage Source Inverter

2014 ◽  
Vol 698 ◽  
pp. 150-154 ◽  
Author(s):  
A.A. Radionov ◽  
A.S. Maklakov ◽  
E.A. Karyakina
Keyword(s):  
Energy Saving ◽  
Power Factor ◽  
Electric Drive ◽  
Power Flow ◽  
Reactive Power ◽  
Reactive Power Compensation ◽  
Voltage Source ◽  
Voltage Source Inverter ◽  
Front End ◽  
Bidirectional Power Flow

This paper addresses the issue of functional possibilities of reversible electric drive based on active front end rectifier and voltage source inverter from the point of view of energy saving. This paper will review all theoretical capabilities of reactive power compensation in the supply mains by the active front end rectifiers. The reactive power consumption or generation can be created out by using of active front end converters which connect the electric drive with supply mains. Active front end rectifiers can be actively used in operation of supply mains of enterprise as they are able to provide controlled power factor and bidirectional power flow. The studies by mathematical modeling in the Matlab/Simulink program were carried out. It was established that the controlling of power factor of active front end rectifier can be used for reactive power compensation in supply mains. The huge prospects of energy-saving reversible electric drive integration to the Smart Grid have been determined as it is able to provide high power and capabilities of the controlling reactive power flow by means of active front end rectifier. It can reduce a share of the consumption reactive power from a substation and to improve the power quality.

scholarly journals FPGA Control Implementation of a Grid-Connected Current-Controlled Voltage-Source Inverter

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Rickard Ekström ◽  
Mats Leijon
Keyword(s):  
Control System ◽  
Power Flow ◽  
Reactive Power ◽  
Moving Average ◽  
Current Control ◽  
Voltage Source ◽  
Voltage Source Inverter ◽  
Control Functions ◽  
Reactive Power Flow ◽  
Step Responses

The full control system of a grid-connected current-controlled voltage-source inverter (CC-VSI) has been designed and implemented on a field-programmable gate array (FPGA). Various control functions and implementation methods are described and discussed. The practical viability of the system is evaluated in an experimental setup, where a VSI supplies 30 kW into the local grid at 400 V. A phase-locked loop (PLL) is used for grid phase tracking and evaluated for simulated abnormal grid conditions. Power factor is kept at unity, and the implemented control system is stressed with step responses in the supplied active power. A moving-average filter is implemented to reduce the effects of noise and harmonics on the current control loops. A coupling between active and reactive power flow is observed for the step responses but may be ignored in this context. The proposed system is fully comparable with more conventional microprocessor-based control systems.

scholarly journals TOTAL HARMONIC DISTORTION REDUCTION BY USING SSSC WITH AND WITHOUT BVSI

2014 ◽  
pp. 54-64
Author(s):  
SURYA PRAKASH ◽  
KAMTA PRASAD VERMA ◽  
BRIJESH SINGH
Keyword(s):  
Transmission Line ◽  
Power Flow ◽  
Power Transmission ◽  
Harmonic Distortion ◽  
Phase Relationship ◽  
Active Power ◽  
Voltage Source ◽  
Positive System ◽  
Voltage Source Inverter ◽  
Active Power Flow

This electronic document is a “live” template. The various In present a new Static Synchronous Series Compensator (SSSC) for the control of active power flow on a transmission line is proposed and its effectiveness is investigated. The new SSSC is based on injecting a voltage in a given line to counter or augment the voltage &Power produced by the inductive reactance of the line. The resulting compensator, therefore, emulates the control of transmission line reactance and thus, it assists in control by the power transmission capacity. The voltage to be injected in a line is produced by a Binary Voltage Source Inverter (BVSI). BVSI is an attractive recently proposed Voltage Source Inverter. Its output contains very little harmonics and it utilizes very few dc sources unlike conventional multi-level VSIs. The % phase output of the BVSI is synchronized to the line frequency and its phase is arranged to be in or out of phase with the Line reactance drop. The proposed BVSI-SSSC is realized by using three binary proportioned dc sources, which may be appropriately dimensioned capacitors. The resulting output of a BVSI-SSSC is a 15-step ac voltage waveform. The BVSISSSC has a sophisticated set of coordinated controlled which ensure: BVSI frequency is in synchronism with the system frequency, firing pulses are regulated for inverter valves to ensure minimum harmonic content, the selection of Modulation Index and arrangement regulates an appropriate phase relationship to create the desired change in the power flow, and adjustment of firing angles to ensure that the capacitors creating dc binary proportioned sources maintain desired charge on them. Armillary controls may be added to create positive system damping through active power control, and voltage dependent controllers may be added to limit over and under voltage (charging) of capacitors during fault conditions.

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