KY Converter Research Articles

Enhancing performance of interleaved KY converter control in single phase grid‐tied PV systems: A hybrid approach

AbstractThis paper proposes a hybrid COA‐QNN approach for an interleaved KY converter with closed‐loop control for a single‐phase grid‐connected photovoltaic (PV) system. The proposed strategy combines both Cheetah Optimizer algorithm (COA) and Quantum Neural Network (QNN), and it is commonly named the COA‐QNN technique. The interleaved KY converter is connected in the converter side. The primary goal of the COA‐QNN technique is to enhance PQ while maximizing PV electricity being transferred to the grid. The proposed COA is utilized to identify the optimal closed‐loop controller enhancements for on‐grid solar photovoltaic systems. The QNN is used to predict the optimal control parameter. The PV‐interleaved KY converter is managed by a predictive control mechanism to carry out both tasks of PQ enhancement. By then the COA‐QNN technique is implemented on the MATLAB platform and compared with existing methods. Finally, the proposed method shows better results in all methods, such as GWO, FF optimization and combined GWO‐FF.

Harmonic Elimination Using Grid Integrated Hybrid Renewable Energy System with Optimized Control for Nano Scale Based 31-Level MLI

This research focuses integration of grid integrated hybrid renewable energy system (HRES) with optimized control techniques for harmonic elimination using Nano Scale Based 31-Level Multi-Level Inverter (MLI). The proposed system combines Renewable Energy Sources (RES), such as Solar Photovoltaic (PV) and Wind Energy Conversion System (WECS) assisted with Doubly Fed Induction Generator (DFIG) to generate power for grid integration. Interleaved KY converter with novel Rain Optimized Algorithm assisted Artificial Neural Network (ROA-ANN) based Maximum Power Point Tracking (MPPT) is established, which is a hybridized approach extracting maximum PV power and optimizes power output for utilization. Excess energy generated from hybrid power sources is utilized to charge battery. The DC supply from hybrid sources is transferred to silicon carbide switches of 31 MLI for elimination of harmonics using Selective Harmonic Elimination Pulse Width Modulation (SHE-PWM). The 31-Level MLI facilitates conversion of DC voltage to AC with assistance of Particle Swarm Optimized Proportional Integral (PSO-PI) controller. Finally, controlled AC supply is transferred to LC filter, resulting in effective grid synchronization with reduced harmonics. The proposed system’s performance is validated using MATLAB Simulink, and obtained results demonstrate effectiveness with reduced total harmonic distortion (THD) of 0.66% in contrast to state-of-art approaches

A 95% Peak Efficiency Modified KY Converter With Improved Flying Capacitor Charging in DCM for IoT Applications

A 95% Peak Efficiency Modified KY Converter With Improved Flying Capacitor Charging in DCM for IoT Applications

Development of Power Conditioning Unit for KY Converter in Fuel Cell Power System

The world's growing economy and demographic advancement are driving an increase in global energy demand. As worries about carbon emissions grow and the demand for electrical energy production continues to rise, it is necessary to develop new methods of electricity production. Fuel cell energy system is one of the promising factors for addressing this problem due to its low emissions, easy accessibility, and fuel flexibility. In this paper, a mathematical model of Solid Oxide Fuel Cell (SOFC) is designed and used as an input for the KY converter. As the output voltage of the fuel cell is low, a KY Converter is desired to raise the output voltage for required applications. To regulate the electrical output voltage of the KY Converter, PID, Fuzzy Logic Controller (FLC), hybrid fuzzy PID, and an ANFIS feedback control mechanism have been simulated and investigated. The function of a fuel cell with a KY Converter, as well as state-space modelling, is developed. The Ziegler-Nichols technique is used to determine the gain parameters of a PID controller, which are Kp, Ki, and Kd. The fuel cell with a Closed-loop system of KY converter is developed using MATLAB/Simulink software. Thus, the fuel cell power system can be used for a variety of applications, including rural and military.

Efficiency analysis of grid tied PV system with KY integrated SEPIC converter

Today's power generation relies heavily on renewable energy, which also contributes to distributed generation, microgrids and smart cities. PV system is a rapidly developing source of renewable energy and acts as stand-alone or grid-connected systems. The utilization of PV energy faces a drastic increase due to the high efficiency of solar cells and enhancements in the design of PV panels. It demands high gain converters for major applications but existing converters generate pulsating outputs leading to output voltage with ripples. In this view, researchers are constantly focusing on converters with increased efficiency and gain generating minimized ripples in resulting current and voltage. Considering these dilemmas, an efficient PV system with KY integrated SEPIC converter is introduced in this article. The KY converter provides improved voltage conversion ratio as well as minimizes the voltage stress while the SEPIC converter offers added step up gain. The proposed converter is regulated by a GWO tuned PI controller for solving the optimization issues. It prevents the local optimum and is robust, simple with the application to complicated optimization tasks. A grid connected 1φ VSI is adopted for ensuring smooth operation with the aid of PWM generator. The simulations are carried out in MATLAB simulation software to prove the efficacy of the introduced approach. The obtained outputs reveal that this developed system has minimal THD value of 1.6% and hence it has higher efficiency which is marked as 97%.

Intelligent cascaded adaptive neuro fuzzy interface system controller fed KY converter for hybrid energy based microgrid applications

Purpose. This article proposes a new control strategy for KY (DC-DC voltage step up) converter. The proposed hybrid energy system fed KY converter is utilized along with adaptive neuro fuzzy interface system controller. Renewable energy sources have recently acquired immense significance as a result of rising demand for electricity, rapid fossil fuel exhaustion and the threat of global warming. However, due to their inherent intermittency, these sources offer low system reliability. So, a hybrid energy system that encompasses wind/photovoltaic/battery is implemented in order to obtain a stable and reliable microgrid. Both solar and wind energy is easily accessible with huge untapped potential and together they account for more than 60 % of yearly net new electricity generation capacity additions around the world. Novelty. A KY converter is adopted here for enhancing the output of the photovoltaic system and its operation is controlled with the help of a cascaded an adaptive neuro fuzzy interface system controller. Originality. Increase of the overall system stability and reliability using hybrid energy system fed KY converter is utilized along with adaptive neuro fuzzy interface system controller. Practical value. A proportional integral controller is used in the doubly fed induction generator based wind energy conversion system for controlling the operation of the pulse width modulation rectifier in order to deliver a controlled DC output voltage. A battery energy storage system, which uses a battery converter to be connected to the DC link, stores the excess power generated from the renewable energy sources. Based on the battery’s state of charge, its charging and discharging operation is controlled using a proportional integral controller. The controlled DC link voltage is fed to the three phase voltage source inverter for effective DC to AC voltage conversion. The inverter is connected to the three phase grid via an LC filter for effective harmonics mitigation. A proportional integral controller is used for achieving effective grid voltage synchronization. Results. The proposed model is simulated using MATLAB/Simulink, and from the obtained outcomes, it is noted that the cascaded adaptive neuro fuzzy interface system controller assisted KY converter is capable of maintaining the stable operation of the microgrid with an excellent efficiency of 93 %.

KY Converter Fed Dc Motor For Low Power Application

This paper aims to design and to simulate a various DC-DC Converter with closed loop control. DC-DC converter is electronic co converter converts direct current source from one voltage to the level voltage. It is a type of electric power converter. The range of power vary from very low to very high. MATLAB Simulink has been used in modelling and simulation of the circuits. We have analysed the closed loop control of various DC-DC converters like buck, boost, buck-boost and KY converters using MATLAB Simulink. The KY converter is chose for the low power application and the same was designed and simulated.

Speed regulation of PV fed 8/6 switched reluctance motor using optimized controller

Due to their low manufacturing costs and straightforward design, Switched Reluctance Motors (SRMs) and drives have recently seen an increase in demand. In addition to the SRM’s double salient structure, the enhanced nonlinearity in the magnetization properties and torque output makes mathematical modeling of the SRM challenging. Therefore, new methods must be developed to increase steady state performance while also achieving greater speed control and precise dynamic reaction. This work presents an innovative, optimized controller for controlling the speed of PV-fed 8/6 SRM. The DC-DC Interleaved KY converter boosts the PV system’s output, and the DC-link voltage is controlled by a PI controller. To transfer the enhanced DC to 8/6 SRM, a BR ((n+1) Diode and (n+1) Semiconductor) converter is employed. The speed of SRM is additionally managed using a Grey Wolf Optimized (GWO) PI controller. Using a multiport battery converter, the surplus power generated by the PV system is then stored in a battery. MATLAB/Simulink is used to complete the suggested tasks, and a prototype is run through simulation to measure performance.

Metaheuristic Algorithm Based Maximum Power Point Tracking Technique Combined With One Cycle Control For Solar Photovoltaic Water Pumping Systems

Solar photovoltaic technology has become eminent in the world because of its clean and abundant nature and can be effectively used for water pumping applications. A maximum power point tracking method is indispensable to achieve the best benefit from photovoltaic systems. Conventional maximum power tracking methods become successful only under uniform irradiance conditions and fail to track the maximum power under partial shading conditions (PSC). Hence, nature-inspired metaheuristic algorithms were proposed to track the optimum power under varying environmental conditions. This study proposes a method for improving the performance of the nature-inspired maximum power point tracking algorithms by using a nonlinear control technique called one cycle control. Based on the duty cycle obtained from the tracking algorithm the one cycle control technique generates pulses for the DC–DC converter, which is connected to a brushless DC motor pump system through a voltage source inverter. The performance of the proposed system under various PSCs is validated using the Cuckoo search, particle swarm optimization, and grey wolf algorithms. Simulation results for various shading patterns prove the supremacy of the system with respect to convergence speed, tracking efficiency, robustness, steady-state oscillations at maximum power point, and initial exploration oscillations in comparison with systems without one cycle control. In addition, the introduction of a KY converter as a DC–DC converter reduces the output voltage ripple in the system. Thus, the proposed system with one cycle control overcomes the disadvantages of the existing methods and can be effectively utilized for water pumping applications.

Comparison and Analysis of Mppt Algorithms for Ky Converter

Comparison and Analysis of Mppt Algorithms for Ky Converter

Comparison and Analysis of Mppt Algorithms for Ky Converter

Comparison and Analysis of Mppt Algorithms for Ky Converter

Comprehensive Review of KY Converter Topologies, Modulation and Control Approaches With Their Applications

In current scenario, the challenging task in designing a DC-DC converter has high voltage gain and small output ripple waves, which researchers deal with highly complicated. Because of its topological and Continuous Conduction Mode (CCM), the KY converters have developed a better converter than all the traditional DC-DC converters to overcome this intricacy of voltage transfer gain and output ripple waves. The KY converters had comparative and various qualities when compared with the boost converter with Synchronous Rectifier (SR). The KY converter is used in photovoltaic and sustainable power applications, which are examined in this study. KY converter incorporates mode-1 and mode-2 operation and its types, for example, one plus D and one plus 2D where the KY can deliver the N <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">th</sup> type of KY converters. This article provides a comprehensive review and investigation of the KY converters, which incorporates their topology with control methodologies, Pulse Width Modulation (PWM) techniques, working activity of KY converters, and types for mode-1 and -2; it interprets the few strategies the KY converter is executed and its applications.

Analysis of novel multi-input KY boost converter

The KY converter gets its name from a paper titled “KY converter and its derivatives” by the author K.I. Hwu and Y.T. Yau (KY converter). The literature survey of various KY converters analysed from 2007 to 2017. From the research study, it is apparent that KY converters have so many advantages than conventional converters. This KY boost converters are mainly used for boosting the voltage from lower value to higher value. This converter also possesses the advantages of low ripples, high Power applications and stable converter. By analysing the performance, the most suitable KY boost converter is developed by Hwu, K.I. This KY boost converter single-stage converter. The same converter is taken for the multi-input analysis. This paper analysis about Multi-Input (MI) converter systems rather than individual converters. The individual converter results in a large volume of the device in the system and high expenditure. The other multi-input converters have at least one zero in the right hand of the jw plane, which leads to instability in the converters. This multi-input KY boost converter transfer function proves that all the poles and zeros are present in the left hand of the jw plane. So, the stability of the converter is good. Multi-input Converters in which Multi-input KY boost converter is superior to other converters.

Reduction of Output Voltage Ripple with Dc-Dc Conversion Using Ky Converter

Reduction of Output Voltage Ripple with Dc-Dc Conversion Using Ky Converter

Implementation of Non-Isolated Zeta-KY Triple Port Converter for Renewable Energy Applications

This paper proposes a three-port Zeta-KY dc-dc converter which is fed with hybrid sources like photovoltaic (PV) cells and batteries. The converter proposed here is a multi-input single-output (MISO) structure which harnesses the benefits of Zeta and KY converters. The combination of these converters is highly advantageous since the Zeta converter provides lesser output voltage ripples with high gain and the KY converter topology suits well for withstanding load transients. The KY converter used in this research work is subjected to a topological change to facilitate bidirectional power flow. The bidirectional flow is essential to save the excess power in PV source in batteries during low load conditions. This novel multiport topology with bidirectional facility is first of its kind and has not been discussed earlier in the research arena. In the proposed work, two control algorithms are developed and deployed: the first one ensures the maximum power extraction from the PV and the second one maintains constant dc bus voltage and manages bidirectional power flow. MATLAB Simulink and hardware prototype of the proposed system has been realized for a 72 V dc bus and a 500 W electric vehicular drive. The simulation and experimental results reveal that the proposed system is viable for medium power electric shuttle applications. The proposed system is subjected to various test cases and it is observed that the source and load intermittencies are catered very well by the proposed three port Zeta-KY converter. The developed multiport converter is feasible for renewable energy applications.

Power Quality Improvement using Intelligent Controllers for a Grid Connected Wind Energy System

The design and performance of single- stage single-stage wind energy meet in the integrated energy quality controller. An essential aspect of shunt compensator the effect of the consonant material is to reduce or prevent the load. In the existing technology, buck-boost converter based power quality improvement for a renewable energy framework. The trouble is the chaotic plan, the high past plan, the conversion mode, and the wave in the current cycle. Therefore, in the proposed technology, the power quality improvement for renewable energy-based (Static Synchronous Compensator) STATCOM based ANFIS demonstrations. Probability by taking into account the high accuracy and low calculation time in the planning and assessing flood vulnerability. Also known as a regulator, on-off regulator, or hysteresis regulator, it is a critical regulator that switches between the two states. These regulators can be traced to a component that gives hysteria. Introduced the KY Help Converter, which merges with the KY Converter Custom Lift Converter. Such a converter has uninterrupted information and yields inductive currents, not the same as a conventional lift converter. Furthermore, subsequently, this converter is suitable for low-bloat applications. The proposed converter's classified outlines to test this currency converter's efficiency are given, along with some experimental results.

DesignandSimulation of High-Efficiency High Gain non Isolated Interleaved DC-DC Converter with Reduced Voltage Stress on the Devices

In this paper, a non-isolated two interleaved modified step up KY Converter is analyzed and designed, whose efficiency,the voltage conversion ratio is high. There are various types of non -isolated converters such as buck-boost, Cuk, SEPIC, ZETA converters, etc but the voltage gain of these converters is less compare to the proposed interleaved KY converters. The voltage gain, efficiency of the proposed converter is enhanced compared to the previous converters. The voltage stress on semi-conductor devices and the ripple in the input current is reduced because of this interleaving technique. Switches with low on-state resistance are used due to which the conduction losses are reduced. Steady-state analysis and the operating principle are studied in continuous conduction mode (CCM) at ideal conditions. Simulation is also carried out in MATLAB/Simulink for the proposed interleaved KY converter.

Comparative analysis of PV powered KY and Luo converter

Comparative analysis of PV powered KY and Luo converter

KY converter with fuzzy logic controller for hybrid renewable photovoltaic/wind power system

AbstractSmart grid includes power generation, transmission, distribution, information integration, metering, management, and protection. All these domains are interconnected through smarter communication. Smarter communication is possible since it's a two‐way flow of information by wireless and wired communication. Generation domain of smart grid consists of renewable variables (wind solar), renewable nonvariables (hydro biomass, geothermal, pump storage), and nonrenewable nonvariables (nuclear, coal, gas). Wind and solar energy, are thought to be the principle properties of sustainable power source for power generation and are developing at a quicker rate throughout a previous couple of decades. In numerous tasks, high voltage conversion converters have a basic influence in boosting the low output voltages of green power facilities to the high voltage is difficult due to voltage ripple and total harmonic distortion. This article comprises novel coordination of KY converter (KYC) with fuzzy logic for photovoltaic (PV) and wind power system. A many inputs KYC for grid‐connected hybrid PV/wind power system by extracting as much renewable energy as possible to using the fuzzy logic controller (FLC) are introduced. The main goal of the process is to follow the greatest force from the sustainable power sources and to overhaul the precision of the absolute system by increasing power factor. With the motivation behind concentrate the greatest power, a FLC has been embraced, right now. Wind energy is rectified and then both PV and wind outputs are given to the FLC. The implementation is done using MATLAB/SIMULINK.

MATLAB/Simulink based simulations of KY converter for PV panels powered LED lighting system

&lt;p&gt;The main objective of this research work is to develop KY conveter topology for renewable energy sources.Solar energy is the readily available and is the cheapest form of energy. It is non-polluting and environment friendly. The development of high static gain DC-DC converters is an important research area due to the crescent demand of this technology for several applications supplied by low DC output voltage power sources. It is used to provide the uninterruptable power supply and battery powered to the system. So here, step-up DC-DC converters based on the KY converter are proposed for LED lighting systems. The proposed topologies present high voltages and high efficiency for low input voltage and high output voltage applications. The simulation results of the proposed topology have been presented using MATLAB/SIMULINK software.&lt;/p&gt;