Solar powered water pumping system with photovoltaic system that tracks a maximum power point

Patent metadata

Field	Value
Publication number	US-9985439-B2
Application number	US-201615282394-A
Country	US
Kind code	B2
Filing date	Sep 30, 2016
Priority date	Dec 30, 2013
Publication date	May 29, 2018
Grant date	May 29, 2018

Abstract

A system and a method provide a photovoltaic system which regenerates the output characteristics of the photovoltaic at different ambient condition with high precision under all environmental conditions. The photovoltaic system includes a photovoltaic array, a buck/boost converter, a DC link capacitor to connect the buck/booster converter to a load/inverter, an adaptive network-based fuzzy inference maximum power point tracking controller, a voltage control loop, a proportional integral controller to maintain the output voltage of the photovoltaic array to the reference voltage by adjusting the duty ratio of buck/boost converter.

First claim

The invention claimed is:

1. A solar powered water pumping system powered by a photovoltaic system that tracks a maximum power point, comprising:
a photovoltaic array that generates a varying DC output voltage and current depending on one or more weather conditions;
a continuous conduction mode buck/boost converter having a capacitance of 100 μF, an inductance of 5 mH and a switching frequency of 5 kHz to step down/step up of the output voltage from the photovoltaic array;
a DC link capacitor having a capacitance of 500 μF to connect the buck/booster converter to a load/inverter, wherein the load/inverter provides a grid output of the photovoltaic system;
an adaptive network-based fuzzy inference maximum power point tracking controller to generate a reference voltage;
a voltage control loop to compare the output voltage of the photovoltaic array to the reference voltage, and
a proportional integral controller to maintain the output voltage of the photovoltaic array to the reference voltage by adjusting the duty ratio of buck/boost converter, and
a pump powered by the current generated by the photovoltaic array.

2. The solar powered water pumping system of claim 1 , wherein
the adaptive network-based fuzzy inference based maximum power point tracking controller generates the reference voltage based on irradiation and temperature,
the reference voltage is output to the voltage control loop, and
the adaptive network-based fuzzy inference based maximum power point tracking controller maps an input-output data set to a 5-layer architecture to generate the reference voltage.

Assignees

• Univ King Fahd Pet & Minerals
• King Abdulaziz City Sci & Tech

Inventors

• Abido Mohamed Ali
• Khalid Muhammad Sheraz

Classifications

• H02J2103/30

  Simulating, planning, modelling, reliability check or computer assisted design [CAD] of electric power networks · CPC title

• H02J2101/30

  Fuel cells · CPC title

• H02J2101/25

  involving maximum power point tracking control for photovoltaic sources · CPC title

• G06N3/043

  based on fuzzy logic, fuzzy membership or fuzzy inference, e.g. adaptive neuro-fuzzy inference systems [ANFIS] · CPC title

• G05B13/04

  involving the use of models or simulators · CPC title