CONTROL OF Z-SOURCE INVERTER USING ADVANCED FUZZY LOGIC CONTROL FOR PV SYSTEM APPLICATIONS

The Z-source inverter (ZSI) has some advantages and suitable for all the Photo Voltaic (PV) system. This paper deals with a new topology for all ZSI with battery for PV power generation and distribution system. Thus the battery is connected parallel to one of the capacitors in Z-Source (ZS) network, instead of involving an additional DC/DC converter. This system builds all the advantages of ZSI. The operating principle of the new topology is designed and the design scheme of the ZS network is explained and also closed-loop control strategy for the proposed system is analyzed to manage the three power flow of PV panel, grid, and battery in the system. Maximum Power Point Tracking (MPPT) has been implemented in the ZSI with battery based PV system by using the proposed control strategy. Different modes of operation are simulated. Simulation for this proposed system using fuzzy logic control technique is completely analyzed through the MATLAB/SIMULINK software

Photovoltaic Based Three-Phase Three-Wire DSTATCOM to improve Power Quality

446-453Three-phase three-wire Distribution Static Compensator (DSTATCOM) with Photovoltaic (PV) array or battery operated DC-DC boost converter is proposed in this paper. The proposed DSTATCOM consists of a three-leg Voltage Source Converter (VSC) with a DC bus capacitor and it provides continuous reactive power compensation, source harmonic reduction and load compensation throughout the day. With the help of PV array or battery, which is connected to the dc link of VSC via the DC-DC boost converter is used to maintain the desired voltage to the dc bus capacitor for continuous compensation to the load. The IcosФ controlling algorithm is proposed for three-phase three-wire DSTATCOM. In this algorithm, the fuzzy logic controller is compared with the conventional PI (Proportional Integral) controller at DC bus to regulate the DC link capacitor voltage. The fuzzy controller is used to maintain the DC link voltage to the reference value. The switching of VSC will occur by Hysteresis based Pulse Width Modulation (PWM) current controller. The simulations are carried out by using MATLAB/simulink software to demonstrate the effectiveness of the proposed scheme

Reduced switch cascaded asymmetrical 27 level inverter-STATCOMwith fuzzy logic controller

<p>In this study, a 27-level inverter with a reduced switch asymmetrical cascaded H-bridge (CHB) with fuzzy logic controller (FLC) is proposed. With series connections, a low voltage converter, a middle level voltage converter, and a high voltage converter make up the static synchronous compensator (STATCOM). The configuration of the asymmetrical inverter uses trinary DC sources. To acquire switching signals for the trinary inverter-based STATCOM to compensate for real power, load voltage, reactive power, load current, and power factor under load changing conditions, FLC is constructed. With fewer switches, the suggested arrangement produces greater voltage levels. The performance of the reduced switch asymmetrical cascaded H-bridge inverter-STATCOM with FLC is simulated using the MATLAB Simulink platform under both static and dynamic load conditions. When compared to reduced switch asymmetrical cascaded H-bridge inverterSTATCOM with traditional proportional integral (PI) controller, the FLC result demonstrates efficient unbalanced load compensation. The FLC in the proposed inverter also lowers the total harmonic distortion. </p&gt

An Efficient Boost Converter for Energy Storage Systems in a DC Distribution System

Power Electronic components and the converters are the mainstays of DC distribution. An Energy Storage System (ESS) is also required to keep the voltage on the DC bus stable. The intermittent power received from renewables has to lifted and stored in ESS. Therfore, a Parallel switch Boost Converter (PBC) is designed for 400 W. The converter is designed for closed loop and the performance of the converters is analysed in terms of output voltage ripple, input current ripple and efficiency. It is also validated that the efficiency of the converter is 2% greater than the conventional Boost Converter (BC). Moreover, the voltage and current ripple of PBC is also lesser by 50%.Scopu

A More Efficient Induction Machine based on Hill Climbing Local Search Optimization

A multi-objective search optimization technique is utilized to improve the efficiency of the induction machine design. This technique is referred to as Random restart local search optimization or Hill Climbing based local search optimization (HC aLSO). To create an induction machine with a high efficiency of operation, the preceding technique utilizes repeated explo-rations of the problem space to generate the induction machine data. To build the induction motor, this suggested technique utilizes objective functions from the discrete and continuous hill climbing processes. The new HC-LSO technique is compared to two current algorithms for multi-objective design optimization of induction motors, namely the Non-dominated Sorting Genetic Algorithm (NSGA-II) and the Hybrid Genetic Algorithm and Particle Swarm Optimization (HGAPSO). The suggested HC a LSO technique and other existing techniques are compared using MATLAB simulations. As a result, the suggested technique's performance has an effect on induction machine parameters such as rotor current, power factor, and efficiency. 2022 IEEE.Scopu