In this paper, a design of the voltage source inverter (VSI) in a hysteresis band current control mode is presented. A proper selection of VSI parameters is necessary to track the desired reference currents at the point of the common coupling to compensate unbalanced and non-linear loads. In this paper, the authors carry out a detailed study on the design parameters and dynamics of the VSI while tracking a reference compensator current. A simulation of three-phase, four-wire compensated system is carried out using PSCAD 4.2.0 to verify the proposed design methods. © 2006 IEEE.

Mahesh Kumar Mishra

Department of Electrical Engineering

Active Power Filters

HYSTERESIS BANDS

INTERFACE INDUCTANCE

Voltage source inverters

Active filters

Circuit simulation

Electric current control

hysteresis

Inductance

Power quality

Switching frequency

Electric inverters

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

A Study on Design and Dynamics of Voltage Source Inverter in Current Control Mode to Compensate Unbalanced and Non-linear Loads

2006 International Conference on Power Electronics, Drives and Energy Systems, PEDES '06

This paper presents a dual voltage source inverter (DVSI) scheme to enhance the power quality and reliability of the microgrid system. The proposed scheme is comprised of two inverters, which enables the microgrid to exchange power generated by the distributed energy resources (DERs) and also to compensate the local unbalanced and nonlinear load. The control algorithms are developed based on instantaneous symmetrical component theory (ISCT) to operate DVSI in grid sharing and grid injecting modes. The proposed scheme has increased reliability, lower bandwidth requirement of the main inverter, lower cost due to reduction in filter size, and better utilization of microgrid power while using reduced dc-link voltage rating for the main inverter. These features make the DVSI scheme a promising option for microgrid supplying sensitive loads. The topology and control algorithm are validated through extensive simulation and experimental results. © 2010-2012 IEEE.

IEEE Transactions on Sustainable Energy

A Grid-Connected Dual Voltage Source Inverter with Power Quality Improvement Features

The unified power quality conditioner (UPQC) is a custom power device, which mitigates voltage and current-related PQ issues in the power distribution systems. In this paper, a UPQC topology for applications with non-stiff source is proposed. The proposed topology enables UPQC to have a reduced dc-link voltage without compromising its compensation capability. This proposed topology also helps to match the dc-link voltage requirement of the shunt and series active filters of the UPQC. The topology uses a capacitor in series with the interfacing inductor of the shunt active filter, and the system neutral is connected to the negative terminal of the dc-link voltage to avoid the requirement of the fourth leg in the voltage source inverter (VSI) of the shunt active filter. The average switching frequency of the switches in the VSI also reduces, consequently the switching losses in the inverters reduce. Detailed design aspects of the series capacitor and VSI parameters have been discussed in the paper. A simulation study of the proposed topology has been carried out using PSCAD simulator, and the results are presented. Experimental studies are carried out on three-phase UPQC prototype to verify the proposed topology. © 1982-2012 IEEE.

IEEE Transactions on Industrial Electronics

A modified three-phase four-wire UPQC topology with reduced DC-link voltage rating

This paper presents, grid synchronization of directly driven variable speed permanent magnet synchronous generator (PMSG)-based wind turbine with unbalanced and non liner loads at the point of common coupling (PCC). The machine-side voltage source converter (M-VSC) is controlled by an efficient vector control strategy to extract the maximum power from the fluctuating wind and grid-side voltage source converter (G-VSC) is actively controlled by instantaneous symmetrical components theory, to feed generated active power as well as to supply the harmonics and reactive power demanded by the non-linear and unbalanced load at the PCC, thus enabling the grid to supply only sinusoidal current at unity power factor. A model of directly driven PMSG-based variable speed wind energy conversion system (WECS) is developed and simulated in MATLAB/SIMULIK environment. The effectiveness of proposed control strategies for M-VSC and G-VSC are validated through extensive simulation studies. © 2012 IEEE.

PEDES 2012 - IEEE International Conference on Power Electronics, Drives and Energy Systems

Synchronization of variable speed PMSG based wind energy conversion system to the grid with power quality improvement features

The distribution static compensator (DSTATCOM) is used for load compensation in power distribution network. In this paper, a new topology for DSTATCOM applications with nonstiff source is proposed. The proposed topology enables DSTATCOM to have a reduced dc-link voltage without compromising the compensation capability. It uses a series capacitor along with the interfacing inductor and a shunt filter capacitor. With the reduction in dc-link voltage, the average switching frequency of the insulated gate bipolar transistor switches of the DSTATCOM is also reduced. Consequently, the switching losses in the inverter are reduced. Detailed design aspects of the series and shunt capacitors are discussed in this paper. A simulation study of the proposed topology has been carried out using power systems computer-aided design simulator and the results are presented. Experimental studies are carried out to verify the proposed topology. © 2011 IEEE.

IEEE Transactions on Power Electronics

A DSTATCOM topology with reduced DC-link voltage rating for load compensation with nonstiff source

The Unified Power Quality Conditioner (UPQC) is a custom power device, which mitigates voltage and current related power quality issues in the power distribution systems. In this paper, two new Voltage Source Inverter (VSI) topologies for UPQC application are proposed. The proposed topologies enables UPQC to have a reduced DC link voltage without compromising the compensation capability. These proposed topologies also help to match the DC link voltage requirement of the shunt and series active filters in the UPQC. In this paper the proposed UPQC topologies are compared with the existing topologies in the literature. A simulation study of the proposed topologies has been carried out and the results are presented. © 2011 IEEE.

2011 International Conference on Power and Energy Systems, ICPS 2011

Comparison of various Voltage Source Inverter based UPQC topologies

Electric Power Systems Research

Inverter topologies for DSTATCOM applications—a simulation study

IEEE Transactions on Industry Applications

Interline Dynamic Voltage Restorer: A Novel and Economical Approach for Multiline Power Quality Compensation

IEEE Transactions on Power Delivery

Control schemes for equalization of capacitor voltages in neutral clamped shunt compensator

IEE Proceedings - Electric Power Applications

Active power filters: A review

A new approach to load balancing and power factor correction in power distribution system

A study on design and dynamics of voltage source inverter in current control mode to compensate unbalanced and non-linear loads

Journal	2006 International Conference on Power Electronics, Drives and Energy Systems, PEDES '06
Open Access	No