Wind Speed Measurement | Anemometer Types & Working

Wind turbines have a variety of data requirements, such as wind speed, wind direction, generator voltage and current, power production, blade pitch, and maintenance issues such as the number of hours the blades have been rotating.  This information is transmitted to a PLC or dedicated computer controller. The instruments measuring …

Read More »

Wind Turbine Blade Aerodynamics

The wind turbine blade on a wind generator is an airfoil, as is the wing on an airplane. By orienting an airplane wing so that it deflects air downward, a pressure difference is created that causes lift. On an airplane wing, the top surface is rounded, while the other surface …

Read More »

Wind Turbine Power Curve

In this section, you will learn several ways to measure the peak performance of a wind generator. One way to measure peak performance is to use a table or graph of a wind turbine power curve. Another way is to measure the amount of usable energy (power produced over time) …

Read More »

Inverter Functions & Application

In addition to types of output waveforms, inverters are also classified according to the interface as either stand-alone or grid-tied. Another inverter configuration, known as a battery backup inverter, is simply an inverter with a built-in charge controller. Stand-alone inverters are used for small applications such as powering a specific …

Read More »

Battery Charger Types | Trickle & Float Charger Working

Continuous Trickle Charger Circuit Diagram

The purpose of a battery charger is to charge a battery without overcharging it. The simplest type of charge controller for renewable energy systems monitors the battery voltage and turns the charging current off or reduces it when the battery voltage exceeds a specified level. It turns the charging current …

Read More »

Single-Axis and Dual-Axis Solar Tracker

Solar trackers increase the efficiency of solar systems by providing more direct sunlight on the collectors. Depending on the location and the specific system, 25% to 40% more energy can be harvested with tracking than without it. Active and Passive Trackers Solar trackers can be categorized as either active or …

Read More »

Solar Concentrators Types & Applications

Concentrating Photovoltaic System

A solar concentrator collects light over a certain area and focuses it onto a smaller area. The light can be focused with either a lens or a mirror. For PV systems, the concentrator can increase the amount of electrical power from each cell in the array. An important application for …

Read More »

Grid-Tied Solar Photovoltaic (PV) System

residential grid-connected PV system

Most PV systems are grid-tied systems that work in conjunction with the power supplied by the electric company. A grid-tied solar system has a special inverter that can receive power from the grid or send grid-quality AC power to the utility grid when there is an excess of energy from …

Read More »