International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 07 | July 2023
p-ISSN: 2395-0072
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THREE-PHASE OF BI-DIRECTIONAL Z-SOURCE CONVERTERS FOR VEHICLE-TO-GRID APPLICATIONS A LOW-HARMONIC AND FUZZY LOGIC CONTROL METHOD Mr. Mamindla. Shyamprasad1, Dr. M. Saravanan2 1PG Scholar in electrical power systems department of electrical and electronics engineering at Holy Mary Institute
of Technology and Science, Bogaram, Medchal Dist, Hyderabad, India.
2Professor of electrical and electronics engineering at Holy Mary Institute of Technology and Science, Bogaram,
Medchal Dist, Hyderabad, India. ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - This paper presents the plan of shut circle
inverters take advantage of the shoot-through states ingeniously to achieve voltage boosting without any additional switches or control circuitry [7]. Therefore, the Zsource inverters could achieve voltage buck and boosting by a single-stage topology with high robust. The voltage level of different microgrids could vary considerably, which makes the Z-source converters more advantageous in the process of EV batteries’ feeding to
regulators working a solitary stage AC-DC three-level converter for further developing power quality at AC mains. Shut circle restrains external voltage regulator and inward current regulator. Reproductions of three level converter with three unique voltage and current regulator mixes, for example, PI-fluffy Rationale control are completed in MATLAB/Simulink. Execution boundaries, for example, input power variable and source current Total Harmonic Distortion (THD) are considered for examination of the three regulator mixes. The fluffy tuned PI voltage regulator with hysteresis current regulator blend gives an improved outcome, with a source-current THD of 0.93% and solidarity power factor with no source side channel for the three level converter. For load varieties of 25% to 100 percent, a THD of under 5% is gotten with a most extreme worth of just 1.67%. At last, the fluffy tuned PI voltage. A source-current THD of 1.351% is gotten in the exploratory review with a power factor close to solidarity. In this paper, three new balance plans for three-stage Z-source converters are proposed and explored. The best performed one is additionally evolved to a shut circle fluffy control strategy. While the voltage change proportion is adaptable, the result voltage Absolute Sounds Bending (THD) is beneath 3% inside the voltage proportion scope of 0.5 to 2.5. The adequacy of the proposed strategy has been completely approved in MATLAB/Simulink reproductions Contrasted with existing control techniques, the proposed one performs better with diminished music, adaptable voltage gain, and more straightforward control algorithm.
The grids. The Z-source inverter could also operate bidirectional, which is essential in V2G applications. The input diode Dr is connected in parallel with a switch S1. When switch S1 is turned on, the Z-source inverter could operate as a conventional three-phase PWM rectifier. Because of the above-mentioned features, Z-source converters have been widely investigated in areas of not only EV charging [8] [9], but also EV motor drive [10] [11], PV solar energy system [12] [13], wireless energy transfer [14] [15] and integration of microgrid [16] [17]. The increasing voltage gain capability and modulation indexes of both rectifier and inverter stages are advantages of threephase Z-source converters [18]. Different approaches of applying bi-directional Z-source inverters in V2G applications have been investigated [19] [20]. Paper [21] provided an overall introduction and comparison of space vector modulation schemes for three-phase Z-source inverters. Besides the basic Z-source impedance topology, many modified Z-source topologies have been developed [22]- [24] to reduce switching loss and improve power density. Though these proposed converters based on Zsource topology could generally achieve smaller size and wider voltage conversion ratio, they have issues in complicated structure, instability, voltage stress of switches, power level limitation [24] and output harmonics [7] [25]. Therefore,
Key Words: Z-source converter, Bi-directional converter, shoot-through states, voltage harmonics, closed-loop closedloop, fuzzy control method
1. INTRODUCTION
This paper aims to improve the performance of converter by designing and optimizing the control method of a basic three-phase Z-source converter, rather than adding more devices or complicated circuits. India has relatively long sunny days for more than ten months and partly cloudy sky for most of the days i.e. almost two months. This makes India very rich in solar energy especially desert sides in west
Shape impedance network composed of two inductors LZ1, LZ2 and two capacitors CZ1, CZ2 is combined in a traditional three phase full-bridge inverter [6]. Because of the existence of the X-shape impedance network, it is possible to turn on the two none bridge simultaneously without short-circuited the input voltage source [4]. Moreover, the Z-source
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