Electric Power Transmission and Distribution
– Electric power is transmitted through overhead lines and underground high-voltage cables.
– Transmission lines deliver electric power over long distances.
– High-voltage transmission lines transport electricity over long distances.
– Transformers are used to step up or step down the voltage for efficient transmission.
– AC (alternating current) is the most common form of electricity used for transmission.
– HVDC (high-voltage direct current) transmission is used for long-distance transmission with lower losses.
– Grid systems connect power generation sources to consumers, ensuring reliable electricity supply.
– Distribution substations receive high-voltage electricity from transmission lines and distribute it to consumers.
– Distribution transformers step down the voltage for use in homes and businesses.
– Power distribution networks consist of overhead lines, underground cables, and distribution transformers.
– Smart grids utilize advanced technologies to monitor and control electricity distribution.
– Power outages can occur due to equipment failures, natural disasters, or human errors.
Electric Power Generation
– Power plants convert various energy sources into electrical energy.
– The most common types of power plants are thermal power plants, hydroelectric power plants, and wind farms.
– Combined heat and power (CHP) systems simultaneously produce electricity and useful heat.
– Distributed generation refers to small-scale power generation located near the point of use.
– The efficiency of power generation is typically less than 50% due to energy losses.
Energy Sources
– Renewable energy sources include solar power, wind power, hydropower, and geothermal energy.
– Non-renewable energy sources include fossil fuels such as coal, oil, and natural gas.
– Nuclear power is a form of energy generated from nuclear reactions.
– Biomass energy is derived from organic matter such as plants and waste materials.
– Tidal power harnesses the energy from the tides to generate electricity.
Electric Power Consumption
– Electric power consumption is measured in kilowatt-hours (kWh).
– Residential, commercial, and industrial sectors are the major consumers of electricity.
– Energy-efficient appliances and lighting can reduce electricity consumption.
– Peak demand refers to the maximum amount of electricity consumed during a specific period.
– Energy conservation and demand response programs aim to reduce electricity consumption.
Electric Power Industry
– The electric power industry produces and delivers power through a grid connection.
– Power is generated by central power stations or distributed generation.
– The industry has been trending towards deregulation, offering consumers competition.
– The grid distributes electrical energy to customers.
– Electric power is widely used in industrial, commercial, and consumer applications. Source: https://en.wikipedia.org/wiki/Electric_power
Electric power is the transfer of electrical energy within a circuit. Its SI unit is the watt, the general unit of power, defined as one joule per second. Standard prefixes apply to watts as with other SI units: thousands, millions and billions of watts are called kilowatts, megawatts and gigawatts respectively.
| Power | |
|---|---|
Common symbols | ℘ or P |
| SI unit | watt (W) |
| In SI base units | kg⋅m2⋅s−3 |
Derivations from other quantities | |
| Dimension | |
In common parlance, electric power is the production and delivery of electrical energy, an essential public utility in much of the world. Electric power is usually produced by electric generators, but can also be supplied by sources such as electric batteries. It is usually supplied to businesses and homes (as domestic mains electricity) by the electric power industry through an electrical grid.
Electric power can be delivered over long distances by transmission lines and used for applications such as motion, light or heat with high efficiency.
