Vienna Rectifier
Abstract— This paper analyses the working of a stand-alone vertical wind turbine system with a Permanent Magnet Alternator (PMA) and a secondary system consisting of an energy storage device for storing energy during wind speed variations. The ancillary system is necessary to support the primary system and improve its reliability under drastic conditions. Initially, the entire system is modeled with the VIENNA Rectifier, and the storage system, excluding the PMA. The output power required by the load is delivered by the proposed system, as a cost-effective resource for rural electrification. The main aim is to supply for lighting and ceiling fan load at 230V/50Hz with a single-phase inverter. The simulation results have been validated with
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This rotating magnetic field may be produced by permanent magnets. Since the permanent magnet field is constant, the terminal voltage varies directly with the speed of the generator. One cycle of alternating current is produced each time a pair of field poles passes over a point on the stationary winding [10].
C. VIENNA Rectifier Vienna Rectifier is a ac/dc converter that was developed in the city of Vienna by researchers to find a way to convert the fluctuating ac supply from a wind farm to a more usable dc for storage applications etc. The traditional circuit was a three-phase input, which provided high quality DC [11].
To meet for small and medium power applications an improved single-phase structure with two legs was developed. A modified version of the same is the single-phase Vienna rectifier with neutral link [12]. Fig. 1. Vienna Rectifier : Modes of Operation
Fig.1. Conduction paths for phase-leg A when: (a) the line current is positive, and the switch is OFF; (b) the line current is positive, and the switch is ON; (c) the line current is negative, and the switch is OFF; and (d) the line current is negative, and the switch is ON …show more content…
The maximum recommended discharge for LABs used in such applications is up to 80% of the maximum charge capacity; thus, SOCmin = 0.2. An analog circuit is constructed using Zener diodes to maintain the SOC between desired levels.
The MOSFET inverter is built using an H-bridge with opposite switches sharing the same gate. The advantages of such inverters are that the circuit dissipates power only during switching event. And its voltage transfer curve follows a sharp transition.
III. SIMULATION RESULTS Traditionally small scale Wind Energy Conversion Systems (WECS) uses a simple diode bridge rectifier to convert the given AC to DC. A diode bridge rectifier has four diodes that is connected as a bridge that allows uncontrolled unidirectional power flow. This rectifies the input AC source to DC.
But, the DBR circuit was not able to provide enough power to charge the battery while supplying the load. This is because the DBR doesn’t generate enough power to drive current into the battery while connected to the load simultaneously. The proposed system has been modeled and simulated using the Matlab/Simulink with the SimPowerSystems environment. Fig. 2. SIMULINK Block Diagram
Fig. 2. shows the block diagrams for simulation. The appropriate measurement blocks are also
This rotating magnetic field may be produced by permanent magnets. Since the permanent magnet field is constant, the terminal voltage varies directly with the speed of the generator. One cycle of alternating current is produced each time a pair of field poles passes over a point on the stationary winding [10].
C. VIENNA Rectifier Vienna Rectifier is a ac/dc converter that was developed in the city of Vienna by researchers to find a way to convert the fluctuating ac supply from a wind farm to a more usable dc for storage applications etc. The traditional circuit was a three-phase input, which provided high quality DC [11].
To meet for small and medium power applications an improved single-phase structure with two legs was developed. A modified version of the same is the single-phase Vienna rectifier with neutral link [12]. Fig. 1. Vienna Rectifier : Modes of Operation
Fig.1. Conduction paths for phase-leg A when: (a) the line current is positive, and the switch is OFF; (b) the line current is positive, and the switch is ON; (c) the line current is negative, and the switch is OFF; and (d) the line current is negative, and the switch is ON …show more content…
The maximum recommended discharge for LABs used in such applications is up to 80% of the maximum charge capacity; thus, SOCmin = 0.2. An analog circuit is constructed using Zener diodes to maintain the SOC between desired levels.
The MOSFET inverter is built using an H-bridge with opposite switches sharing the same gate. The advantages of such inverters are that the circuit dissipates power only during switching event. And its voltage transfer curve follows a sharp transition.
III. SIMULATION RESULTS Traditionally small scale Wind Energy Conversion Systems (WECS) uses a simple diode bridge rectifier to convert the given AC to DC. A diode bridge rectifier has four diodes that is connected as a bridge that allows uncontrolled unidirectional power flow. This rectifies the input AC source to DC.
But, the DBR circuit was not able to provide enough power to charge the battery while supplying the load. This is because the DBR doesn’t generate enough power to drive current into the battery while connected to the load simultaneously. The proposed system has been modeled and simulated using the Matlab/Simulink with the SimPowerSystems environment. Fig. 2. SIMULINK Block Diagram
Fig. 2. shows the block diagrams for simulation. The appropriate measurement blocks are also