control structure for single-phase stand -alone wind based energy sources

Control Structure for Single-Phase Stand -Alone Wind Based Energy Sources

Objective of Stand-Alone Systems:A stand-alone power system (SAPS), also known as remote area

power supply (RAPS), is an off-the-grid electricity system for

locations that are not fitted with an electricity distribution system

There are several types of wind energy systems.There are stand-alone

systems which provide reliable power solely from the wind. A stand-

alone system may have a method for storing energy when wind

conditions are not good. Usually, batteries are used for storage.

These are applicable for micro systems(100watts or less) and can be

used for remote area lighting, portable and emergency lighting etc.

Wind Energy Systems

How much Energy is in Wind?

A wind energy system usually needs an

average annual wind speed of atleast

15km/hr.

Wind speed is measured by an instrument

called an anemometer which turns faster

as the wind blows harder on it. A data

logger can be used to record

instantaneous observations of wind

speed, or to store a long term record for

later analysis.

Stand-Alone Wind Turbine Configuration

Control Structure for Boost Converter

MPPT CONTROL BLOCK

STORAGE SYSTEM CONFIGURATION

Advantages

A simple control strategy for generator side converter to extract maximum power is implemented using simulation software.

The controller is capable of maximizing output of variable speed wind turbine under fluctuating wind.

Controller can regulate the load voltage and frequency at constant or under varying load conditions.

Regulation of output is done without battery overcharging.So power can be effectively used.This contributes battery life extension and reliability.

APPLICATIONS

These are useful for Portable system for lighting and

communication systems. Remote area lighting. Educational programs and displays. Electric fences.

SIMULATION DIAGRAM FOR CONTROL STRUCTURE FOR SINGLE-PHASE STAND-ALONE WIND-BASED ENERGY SOURCES :

SIMULATION RESULT WERE CARRIED BY:

1. variation of the wind speed, while the load is constant(two case studies).

Case 1) Decreasing variation of the wind speed, while the load is constant (P = 1 kW).

Case 2) Random wind speed variation with variable load.

2. load switching, with a fixed wind speed (two case studies).

Case 1) 2-kW load switching at 9 m/s

Case 2) 1-kW load switching at 0 m/s.

CASE 1A) DECREASING VARIATION OF THE WIND SPEED, WHILE THE LOAD IS CONSTANT (P = 1 KW):

CASE 2A) RANDOM WIND SPEED VARIATION WITH VARIABLE LOAD:

CASE 1) 2-KW LOAD SWITCHING AT 9 M/S:

TIME(S)

CASE 2B) 1-KW LOAD SWITCHING AT 0 M/S:

Thank you ..!!