Challenge A: A more and more energy efficient railway Substation ...

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Challenge A: A more and more energy efficient railway Energetic efficiency focus on technical solutions for efficient use less energy possible for the same service rendered. The current approach linked to the general design of a substation, goes towards a standardization, which aim consists of apply and install equipment and render the systems uniform on the railway network. The need of energy efficiency is ideal for the evolution of standardization procedure through the approach of control of energy. Up to day, changing technologies specially energy management of building, (heat insulation, lightings, heating) and the control of electric devices, prove that the new developed systems in industry, take into consideration these notions and they likely to interfere in the changing of installed equipment. Two sources of energy improvement have been noticed: - la building energy management, by : • Better heat insulation of building due to the respect of thermal Rule RT2005 (a study shows energy gain is estimated for about 4000KWH/year). • Indoor lighting management by setting up of multiplier detector presence with builtin light meter and outdoor lighting by setting up of LED projectors (energy gain is estimated for about 60% comparing to actual lighting. • HVAC control in two approaches air heating and geothermal - Electrical switch stand by : • Innovation solution allowing to feed the electric command independently by photovoltaic cell i.e. zero consumption • Full electrical relay Availability of sources of renewable energy production and storage associated The aim is to replace the fossil energy by renewable energy. Two solutions might be easily workable on an isolated site in a substation: Solar energy and wind power. Concerning storage device, RAGONE diagram has permitted to compare the energetic performances of each technology. RAGONE diagram is the device commonly admitted; on logarithmic scale, it places as specific power (in w/kg) according to the specific energy of storage device (in wh/kg). The outcome of the possible use of three workable solutions is complementary further to use in electrical substation, batteries, ultra capacitors and flywheel inertia.
Challenge A: A more and more energy efficient railway Figure 4 : System architecture and storage of energy production with supervision Model conception The first design of electric substation with zero auxiliary consumption “CAN” carried out by the software HOMER ENERGY, shows that the solution generating sources of renewable energy combined is the most advantageous. The proliferation of solar and wind energy deposits and substantially reduces the capacity of storage devices with batteries. For their production, these two sources are balanced and complementary. In fact, the sources of production of photovoltaic energy are more important during times estivalle while wind generation sources are more important during winter. Unlike photovoltaic systems or wind energy production, only this combination of two systems of production of energy consumption leads to a relatively homogeneous, which generates a low level of availability of energy as well as low in excess energy. The work done under the pre design validation of previous guides into three main parts: The first studies the development of a model in MATLAB/SIMULINK, in order to observe the system behaviour in terms of power out put fluctuations intrinsic to generators of renewable wind and photovoltaic types as wells as based on different combinations of storage systems in place. The second part validates the previous results experimentally on a test bench locates in the school HEI in Lille. At last, the third part, occupies the validation of the first design of the system in order to assess the needs of production and storage of sub station further to the specific constraints of sunshine and wind.
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Challenge A: A more and more energy efficient railway Substation ...

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