Three‐phase single‐stage grid tied solar PV ECS using PLL‐less fast CTF control technique

2017 ◽  
Vol 10 (2) ◽  
pp. 178-188 ◽  
Author(s):  
Rahul Kumar Agarwal ◽  
Ikhlaq Hussain ◽  
Bhim Singh
Keyword(s):  
Single Stage ◽  
Control Technique ◽  
Solar Pv ◽  
Three Phase

scholarly journals Anfis Controller Based Reconfigurable Solar Converter for Single Stage Power Conversion-PV Battery System

2019 ◽  
Vol 8 (12) ◽  
pp. 3266-3270
Keyword(s):  
Power Conversion ◽  
Paper Analysis ◽  
Single Stage ◽  
Solar Pv ◽  
Battery System ◽  
Cost Weight ◽  
Three Phase ◽  
Interface System ◽  
Battery Application ◽  
Neural Fuzzy

In this paper, analysis of Reconfigurable Solar Converter (RSC) based on Adaptive Neural Fuzzy Interface System (ANFIS) controller is presented for PV battery application. The major concept of RSC is to use single stage three phase grid tie solar PV converter system to perform both dc/ac and dc/dc operations. The conversion stages are decreased and cost, weight reduces. ANFIS controller improves the performance of the system. An effective Mat lab / Simulation result presents the attractive performance of proposed system

scholarly journals MODIFIED CAPACITOR ASSISTED EXTENDED BOOST QUASI Z-SOURCE INVERTER FOR THE GRID-CONNECTED PV SYSTEM

2019 ◽  
Vol 20 (1) ◽  
pp. 140-157
Author(s):  
N Hemalatha ◽  
Seyezhai Ramalingam
Keyword(s):  
Reactive Power ◽  
Fuzzy Controller ◽  
Single Stage ◽  
Control Technique ◽  
Duty Ratio ◽  
Grid System ◽  
Pv System ◽  
Power Injection ◽  
Three Phase ◽  
Boost Factor

A grid-tied, single stage, three phase, PV system provides higher efficiency than a two-stage PV system. This paper presents a three-phase, single stage, grid-connected PV system with MPPT and reactive power injection capability into the grid using modified capacitor assisted extended boost quasi Z-source inverter (MCAEB q-ZSI) as the grid-tied PV inverter. The adaptability of the inverter for irradiance changes and the boost factor control with its shoot-through duty ratio adjustment made it highly recommended for the grid system. The shoot-through control technique like maximum constant boost control with a third harmonic injection enhances the performance of the inverter by reducing the low order ripples and voltage stress. The fuzzy voltage controller is proposed with the capacitor linearization algorithm to regulate the DC-link voltage. The current approach uses a fuzzy controller to control the real and the reactive power injection into the grid. The performance evaluation of the fuzzy and PI grid controller is carried out for the constant irradiance condition and from the investigation, parameters like boost factor (B), the shoot-through duty ratio(Ds), real power (P), reactive power (Q),  power factor and harmonics in the current injection are determined. A laboratory setup of the PV powered grid system is implemented, tested and validated with the simulation results. ABSTRAK: Dalam sistem fotovoltaik (PV) yang bersambung dengan satu peringkat, satu sistem elektronik kuasa yang mempunyai keuntungan dan kecekapan yang tinggi diperlukan untuk menginterupasi dengan utiliti tersebut. Dalam makalah ini, kapasitor yang diubah suai dibantu oleh pemacu kuadratik Z-source yang dilanjutkan (MCAEB q-ZSI) bertindak sebagai unit interfacing antara PV dan grid. Penyesuaian penyongsang untuk perubahan sinaran dan kawalan faktor rangsangan dengan pelarasan nisbah tugas menembak membuatnya sangat disyorkan untuk sistem grid. Teknik kawalan menembak seperti kawalan rangsangan berterusan maksimum dengan suntikan harmonik ketiga meningkatkan prestasi penyongsang dengan mengurangkan aruhan pesanan rendah dan tekanan voltan. Pendekatan semasa menggunakan pengawal kabur untuk mengawal suntikan kuasa sebenar dan reaktif ke grid. Penilaian prestasi pengawal grid fuzzy dan PI dilakukan untuk keadaan iradiasi malar dan dari penyiasatan, parameter seperti faktor rangsangan (B), nisbah tugas menembak (Ds), kuasa nyata (P), kuasa reaktif Q), faktor kuasa dan harmonik dalam suntikan semasa ditentukan.   

scholarly journals Three-Phase PWM Inverter for Isolated Grid-Connected Renewable Energy Applications

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3701
Author(s):  
Ahmed Ismail M. Ali ◽  
Takaharu Takeshita ◽  
Mahmoud A. Sayed
Keyword(s):  
Renewable Energy ◽  
Single Stage ◽  
Switching Frequency ◽  
Solar Pv ◽  
Pass Filter ◽  
Pwm Inverter ◽  
Energy Applications ◽  
Harmonic Elimination ◽  
Three Phase ◽  
Harmonic Components

This paper proposes a three-phase isolated flyback inverter (IFBI) for single-stage grid-tied solar PV applications, considering a simple sinusoidal pulse-width modulation (SPWM) scheme. The proposed single-stage inverter employs a reduced passive elements count by considering three input-parallel output-differential (IPOD) flyback converter modules. Additionally, a single small size LC-input low-pass filter is utilized at the input paralleling point for ripple-free input current operation, which is essential in grid-connected renewable energy applications. In addition, a mathematical model of the IFBI is presented to confirm the existence of its low-order harmonic components. A simple PI controller-based control scheme, considering only two loops and five sensors, is used to control the proposed grid-tied IFBI. Continuous modulation scheme (CMS) combined with SPWM is used to diminish the low-frequency harmonic components. Moreover, a simple selective harmonic elimination (SHE) loop is used for second-order harmonic components (SOHC) elimination from grid-injected currents. The SHE has decreased the SOHC from 43% to 0.96%, which improves the grid current THD from 39% to 3.65%, to follow the IEEE harmonic standard limits. Additionally, the harmonic elimination technique decreases the circulating power between the inverter paralleled modules, which enhances the grid currents power factor. The proposed inverter is verified through a grid-connected 200 V, 1.6 kW, 60 Hz experimental prototype, and the switching frequency is 50 kHz. TMS-based DSP controller is used to control the grid-injected power to follow the reference power set-point.

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