The Elbe Project (german: Elbe-Projekt) was the name of the first commercial, static

high voltage direct current A high-voltage direct current (HVDC) electric power transmission system (also called a power superhighway or an electrical superhighway) uses direct current (DC) for electric power transmission, in contrast with the more common alternating curren ...

transmission system constructed in the world. The scheme was based on

mercury arc valve A mercury-arc valve or mercury-vapor rectifier or (UK) mercury-arc rectifier is a type of electrical rectifier used for converting high-voltage or high-current alternating current (AC) into direct current (DC). It is a type of cold cathode gas-fil ...

s. Experimental installations between Wettingen and

Zürich Zürich () is the list of cities in Switzerland, largest city in Switzerland and the capital of the canton of Zürich. It is located in north-central Switzerland, at the northwestern tip of Lake Zürich. As of January 2020, the municipality has 43 ...

Switzerland ). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel ...

, and Charlottenburg and

Moabit Moabit () is an inner city locality in the borough of Mitte, Berlin, Germany. As of 2016, around 77,000 people lived in Moabit. First inhabited in 1685 and incorporated into Berlin in 1861, the former industrial and working-class neighbourhood i ...

Berlin Berlin ( , ) is the capital and largest city of Germany by both area and population. Its 3.7 million inhabitants make it the European Union's most populous city, according to population within city limits. One of Germany's sixteen constitue ...

, were demonstrated between 1933 and 1942. Contracts were signed with

AEG Allgemeine Elektricitäts-Gesellschaft AG (AEG; ) was a German producer of electrical equipment founded in Berlin as the ''Deutsche Edison-Gesellschaft für angewandte Elektricität'' in 1883 by Emil Rathenau. During the Second World War, AEG ...

and

Siemens Siemens AG ( ) is a German multinational conglomerate corporation and the largest industrial manufacturing company in Europe headquartered in Munich with branch offices abroad. The principal divisions of the corporation are ''Industry'', '' ...

in 1941, and construction began of a

bipolar Bipolar may refer to: Astronomy * Bipolar nebula, a distinctive nebular formation * Bipolar outflow, two continuous flows of gas from the poles of a star Mathematics * Bipolar coordinates, a two-dimensional orthogonal coordinate system * Bipolar ...

direct current line from the Vockerode power station near

Dessau Dessau is a town and former municipality in Germany at the confluence of the rivers Mulde and Elbe, in the '' Bundesland'' (Federal State) of Saxony-Anhalt. Since 1 July 2007, it has been part of the newly created municipality of Dessau-Roßlau ...

on the

Elbe The Elbe (; cs, Labe ; nds, Ilv or ''Elv''; Upper and dsb, Łobjo) is one of the major rivers of Central Europe. It rises in the Giant Mountains of the northern Czech Republic before traversing much of Bohemia (western half of the Czech Repu ...

, to Berlin- Marienfelde, in 1943. The line was designed to transmit 60

megawatt The watt (symbol: W) is the unit of Power (physics), power or radiant flux in the International System of Units, International System of Units (SI), equal to 1 joule per second or 1 kg⋅m2⋅s−3. It is used to quantification (science), ...

s using a symmetrical bipolar operating voltage of +200 kV and −200 kV. Two single-core buried cables with aluminum conductors were used. A piece of the cable used can be seen in the

Deutsches Museum The Deutsches Museum (''German Museum'', officially (English: ''German Museum of Masterpieces of Science and Technology'')) in Munich, Germany, is the world's largest museum of science and technology, with about 28,000 exhibited objects from ...

Munich Munich ( ; german: München ; bar, Minga ) is the capital and most populous city of the States of Germany, German state of Bavaria. With a population of 1,558,395 inhabitants as of 31 July 2020, it is the List of cities in Germany by popu ...

. While the former converter valve hall at Vockerode Power Plant still exists and was used as a workshop, the corresponding hall at Berlin-Marienfelde, which was situated just north of today's Marienfelde substation, was demolished and replaced by a large hardware store. The system was never put into service owing to the chaos in

Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...

at the end of

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...

. The

Soviets Soviet people ( rus, сове́тский наро́д, r=sovyétsky naród), or citizens of the USSR ( rus, гра́ждане СССР, grázhdanye SSSR), was an umbrella demonym for the population of the Soviet Union. Nationality policy in th ...

dismantled the system as part of war reparation payments, and reused it in building the 115 kilometre long 200 kV Moscow–Kashira monopolar high voltage direct current line with a maximum transmission rating of 30 megawatts in 1951.Kimbark, E.W., Direct current transmission, volume 1, Wiley Interscience, 1971, pp 7–8. This transmission line is no longer operating.

Sites

References

External links

{{Portal, Germany, Energy
Power Electronics in Europe

Modern Power Systems - 100 Years of High Voltage Links, 1 November 2007, retrieved 27 January 2009
HVDC transmission lines Research and development in Nazi Germany Electric power transmission systems in Germany