Created the first hybrid power line

Employees of INME Sciences, VNIIKP and MAI in the framework of the Program of the Presidium of the RAS "The fundamental basis for the development of energy systems and technologies, including high-temperature superconductors" created and successfully tested the world's first hybrid power line. Energy is transferred to it in two forms — as a stream of liquid hydrogen in the form of electricity to the superconducting power cable.

Experimental model of superconducting power cable. Light stripes — superconductor, the rest — layers of copper wires for protection during short-circuit


The creation of new types of power lines — it is very relevant, but not easy. The presented research team proposed an entirely new idea: cable power transmission line, which combines a superconductor and a refrigerant, which not only supports the superconducting cable, but an energy carrier. This idea is brought to the prototype used as a refrigerant liquid hydrogen. The loss to maintain a low temperature in the "vodoricheskih" (from the hydricity = hydrogen + electricity) transmission lines for electricity is a tenth of a percent, and environmental friendliness of hydrogen technology and matched with the low price of a superconducting material — complementary but also weighty, the arguments
    Comments on the project participant, a former employee of the Physics Institute, now the head of the department of superconducting wires and cables of "VNIIKP", Doctor of Technical Sciences Vitaliy S. Vysotsky: "Hydrogen — one of the most energy efficient, it has the highest energy density among other fuels. But other than that hydrogen has good cooling properties in the liquid state, and this" free "in a stream of cold hydrogen can be used in cryogenic superconducting cables for additional highways electricity transmission, which significantly increases power density. "
    As a superconducting material used in its work tape magnesium diboride MgB2 (Manufactured by Columbus Superconductor, Italy). This low-temperature superconductor with a critical temperature of ~ 39 K was discovered as recently as 2001. For use in the hydrogen line is well suited primarily because it can operate at a temperature of liquid hydrogen, demonstrating a high superconducting property. But, most importantly, it is relatively simple to manufacture and very cheap. Compared with the known high temperature superconductors the price is less than twenty times. With the latter two features using magnesium diboride is very interesting for hydrogen energy highways. Verification of this idea I was the purpose of the first practical experiment. It is important to note that was created during VNIIKP superconducting cable was the second case of the use of magnesium diboride in practice, while the advantages of this material is available only to developers managed magnet MRI scanners. As regards the structure of the superconducting cable, that its main current-carrying layer is composed of five ribbons magnesium diboride spirally arranged on the core bundle of copper wires. Cable diameter is 26 mm and the length — 10 meters. In this case remains isolated within the channel diameter of about 12 mm for the flow of cooling liquid para-hydrogen. Also parahydrogen and circulated in the cavity between the outer cable sheath diameter of 28 mm and an inner wall of the cryostat 40 mm.

    In operation, the layout was created hybrid power line (with a working pressure up to 10 bar) for placing a superconducting cable, superconducting cable is actually himself and current inputs. Experimental tests were carried out on the energy highway specialized test benches set of "Chemical Automatics Design Bureau" (Voronezh).

An experimental model of a hybrid energy highway


   Vitaly Vysotsky said the results of the tests: "Needed Now the distances of the order of transmission of 3000-5000 km, and the required power — about 10 GW. Highway in the model we tested, the flow of liquid hydrogen at 200-220 g / s. Has about 25 MW of power, plus the superconducting cable is electrical power, in this case 50 MW. But it is easy to increase threefold by adding the number of superconducting tapes, even in our trunk. in the same industrial line, by increasing the current, voltage and the amount of hydrogen flow (increased diameter of the pipe), you can skip much more powerful streams of energy. "
    Comments on the work of a senior researcher at the Laboratory of Superconductivity LPI, the candidate of physical and mathematical sciences Yuri F. dace: "The work raises a number of positive emotions. Firstly, the creation of a hybrid line is, in fact, a new kind of practical applications of superconductors. Secondly, the use of current-carrying element on the basis of magnesium diboride, since the discovery of superconductivity in which it took only 10 years old, shows that this material is very promising for other possible applications of the technique. Thirdly, this pioneering experiment was done in Russia, showing that the potential of Russian science is not settled, and we can expect new achievements of our scientists. "
    Discussion of the possibility of hybrid energy transport routes is a long time in the world. In May 2011 in Potsdam Institute of advanced sustainability studies led by Nobel laureate Carlo Rubbia symposium, which explored the possibility of transmission of energy flows of the order of 10 GW at distances of thousands of kilometers. It was a theoretical calculation, which showed that the optimal solution is exactly the hybrid line with liquid hydrogen and superconducting cable based on MgB2. However, the first experimental work was done in Russia. This is good news.
    / 15.03.2012 / According to the materials ANI "LPI-Inform"

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