Trystan Casey
The history of electricity is a long and fascinating one, dating back to 600 BC when the ancient Greeks, namely Thales of Miletus, discovered static electricity through the triboelectric effect. However, it wasn't until the 1800s that electricity became a viable source of power with the invention of the voltaic pile, which later evolved into the electrical battery. The late 19th century saw the emergence of hydropower as an electricity source, with the world's first hydroelectric plant going online in 1882 in Appleton, Wisconsin. The development of the power grid by Edison in 1882 transformed the electricity industry, and subsequent decades witnessed the rapid expansion of electricity generation with larger power plants and advancements in renewable energy sources such as wind, solar, and nuclear power.
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The first studies of electricity
The history of electricity can be traced back to 600 BC, when the Greek philosopher Thales of Miletus discovered static electricity by rubbing amber rods with fur. This method, now known as the triboelectric effect, was the first step towards understanding and harnessing electrical power. However, it wasn't until much later that electricity began to be studied and used more extensively.
In the early 1700s, English scientist Francis Hauksbee made a significant discovery by creating a glass ball that emitted a bright light when rubbed, demonstrating the principles of electrical attraction and repulsion. This laid the foundation for the development of neon lighting centuries later. During the same period, in 1752, Benjamin Franklin conducted his famous kite experiment, proving that lightning is a form of electrical discharge.
In the late 18th and early 19th centuries, several important advancements were made in the field of electricity. In 1775, Hugh Williamson reported experiments on the electric eel's ability to deliver shocks, while John Hunter, a surgeon and anatomist, described the structure of the fish's electric organs. This led to Luigi Galvani's discovery of bioelectromagnetics in 1791, revealing the role of electricity in neural signalling. Alessandro Volta's invention of the voltaic pile in 1800 provided scientists with a more reliable source of electrical energy, marking a significant milestone in the pursuit of understanding electricity.
The recognition of electromagnetism, unifying electric and magnetic phenomena, is credited to Hans Christian Ørsted and André-Marie Ampère in the early 1800s. This was followed by Michael Faraday's invention of the electric motor in 1821 and the first rudimentary dynamo by Hippolyte Pixii in 1832. These advancements paved the way for further exploration and applications of electricity, leading to its integration into various aspects of human life over the next century.
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The voltaic pile
Initially agreeing with Galvani's conclusions, Volta soon developed his own theories. He believed that animal tissue was unnecessary and that any moist material between different metals would produce electricity. This idea, which he called "metallic electricity", stood in contrast to Galvani's concept of "animal electricity".
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Hydropower
The birth of the modern hydropower turbine began in the mid-1700s when French hydraulic and military engineer Bernard Forest de Bélidor wrote the groundbreaking "Architecture Hydraulique". This work explored how growing societies could use their water resources to fill power and other basic needs. In 1849, an engineer named James Francis developed the Francis Turbine, the type of turbine most widely used today.
In 1878, the world's first hydroelectric project was used to power a single lamp in the Cragside country house in Northumberland, England. In 1880, a dynamo powered by a water turbine provided power to a theatre and storefront in Grand Rapids, Michigan. This was the first instance of hydropower being used as a commercial electricity generation source. By 1886, there were 40 to 50 hydroelectric plants operating in the U.S.
In 1882, the world's first hydropower plant began operations in Appleton, Wisconsin, on the Fox River. Within a decade, hundreds of hydropower plants were in operation. In 1893, the Redlands Power Plant in California came online, using the natural flow of water from nearby Mill Creek to power communities via alternating current technology.
In the 20th century, hydropower development gained momentum, particularly in the post-World War II era, with state-owned utilities building significant hydropower projects in Western Europe, the Soviet Union, North America, and Japan. In the 21st century, hydropower development has seen renewed momentum, particularly across Asia and South America. Between 2000 and 2017, nearly 500 GW in hydropower installed capacity was added worldwide, representing a 65% increase.
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Wind power
Humans have been harnessing energy from the wind for thousands of years. The use of wind to provide mechanical power came into existence in ancient times, with the Babylonian emperor Hammurabi using windmills for his irrigation project in Mesopotamia in the 17th century BC. The first wind turbine used for electricity production was built in Scotland in July 1887 by Prof James Blyth, a 10-metre-high cloth-sailed wind turbine that powered the lighting in his holiday cottage. This made it the first house in the world to be powered by wind energy. Blyth later built another wind turbine to supply emergency power to the local Lunatic Asylum, Infirmary, and Dispensary of Montrose, but the technology was not considered economically viable at the time, and it did not catch on.
Wind-powered turbines slowly spread around the world, especially in the American Midwest, where they were used for irrigation pumps. In 1941, the first 1.25-MW turbine was connected to the grid in Castleton, Vermont, known as Grandpa's Knob. The oil crisis of the 1970s renewed interest in wind power, and research and development were spurred. The U.S. federal government supported this research, and by the early 1980s, thousands of wind turbines were installed in California due to policies encouraging renewable energy use. The first utility-scale wind farms began appearing in California during this decade.
Europe has taken a leading role in offshore wind farms, with the first one installed in Denmark in 1991. By the end of 2021, Europe had 236 GW of installed wind capacity. The Wind Turbine Verification Program, established in 1993, played a crucial role in introducing electric utilities to emerging wind turbine technologies and boosting confidence in wind power. The U.S. Department of Energy's Wind Energy Technologies Office (WETO) has also been integral to the advancement of wind energy in the country, funding research to improve efficiency and reduce environmental impact.
Today, wind-powered generators come in all sizes, from small stations for battery charging at isolated residences to gigawatt-sized offshore wind farms that contribute to national electrical networks. Wind energy has made significant progress, with the share of U.S. electricity generation from wind power growing from less than 1% in 1990 to about 10.2% in 2022. By the early 2020s, wind power generated 7% of electricity globally, and it continues to be an important renewable energy source.
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Solar power
In 1839, French scientist Edmond Becquerel discovered the photovoltaic (PV) effect by experimenting with an electrolytic cell made of two metal electrodes in a conducting solution. The PV effect refers to the process of generating an electric current or voltage when exposed to light or radiant energy. This discovery marked the beginning of solar power as a potential source of electricity.
Building on Becquerel's work, French mathematician Augustin Mouchot started registering patents for solar-powered engines in the 1860s. Mouchot's patents inspired inventors from France to the United States, who began filing for their own patents on solar-powered devices. In 1884, Charles Fritts installed the first solar panels on a New York City rooftop. Fritts created the first solar cell by coating selenium with a thin layer of gold, achieving an energy conversion rate of 1-2%.
The development of solar power continued with advancements made by scientists and inventors worldwide. In the late 19th century, hydropower and the construction of the first hydroelectric plants marked another significant step in the evolution of electricity generation. However, solar power remained a relatively niche concept until the 1950s, when Bell Laboratories discovered that semiconducting materials like silicon were more efficient than selenium. This led to the creation of a silicon solar cell with a 6% efficiency rate.
Since then, solar power has gained traction as a viable energy source. Commercial concentrated solar power plants were first developed in the 1980s, and the capacity and production of grid-connected solar PV systems have doubled approximately every three years. In 2022, global solar generation capacity surpassed 1 TW for the first time, and solar power is now the largest source of new renewable capacity.
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Frequently asked questions
The first source of electricity was the triboelectric effect, discovered by the Greek philosopher Thales of Miletus in 600 BC. This method involved using amber rods to generate sparks and lift light objects. However, it was extremely inefficient.
In the eighteenth century, Alessandro Volta invented the voltaic pile, which provided a more reliable source of electricity than previous methods. This eventually led to the development of the electrical battery.
The world's first power station was built by Edison in New York City in 1882. It used coal-fired steam engines to generate electricity.
Hydropower was the first renewable energy source to be used for commercial electricity generation in the late 1800s. The first hydroelectric plant began operating in 1882 in Appleton, Wisconsin.
