In an electrical power system, **generation** refers to the process of producing electrical power from various sources of energy. It is the first stage in the power supply chain before the electricity is transmitted and distributed to consumers.
Electricity is generated in power plants, where different types of energy sources are used to produce electrical energy. These energy sources can be:
1. **Fossil Fuels**: Such as coal, oil, or natural gas. These are burned to produce heat, which is used to generate steam. The steam drives a turbine connected to a generator to produce electricity.
2. **Nuclear Energy**: Nuclear power plants use the heat generated from nuclear reactions to create steam, which drives a turbine to generate electricity.
3. **Renewable Energy**: Includes sources like solar power (using sunlight), wind power (using wind to turn turbines), hydropower (using water flow to turn turbines), and geothermal energy (using heat from beneath the Earth's surface).
4. **Hydroelectric Power**: This is one of the most common forms of generation. It uses the energy from flowing or falling water to turn turbines that generate electricity.
5. **Others**: Other emerging sources include tidal, wave, and biomass energy.
The generated electrical power is typically in the form of **alternating current (AC)**, which is more efficient for transmission over long distances. This AC power is then sent to transformers and transmission lines to be delivered to homes, industries, and other consumers.
In short, **generation** is the first step in the process of creating and supplying electrical power, making it the foundation of an electrical power system.