TU-TESL

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(source: eenews) according to foreign media reports, in order to save renewable energy, TenneT, the power transmission system operator, the automobile manufacturer and the mobility house, a technology company, jointly completed an important vehicle to power grid (V2G) pilot project. The project aims to explore the potential of electric vehicle battery storage and "back feeding" local power, so as to stabilize the power grid, improve the utilization of renewable energy, and reduce CO2 emissions. The project provides a solution to a core challenge in the German energy market: transport bottlenecks between grids due to decentralized access to renewable energy (46% in 2019). To avoid this, TenneT has to take steps to reduce renewable power generation in northern Germany, while increasing conventional power generation in the south. The cost of this work is very high, especially in peak load period. In order to prevent this, taking into account the travel and charging needs of vehicle users, electric vehicles in northern Germany began to use wind power; at the same time, in the southern region, the electric power of Nissan LEAF electric vehicle battery (fully charged) was sent back to the grid to replace fossil fuel power generation. As a result, the utilization of renewable energy is improved and wind power generation in the north can be avoided due to high cost energy consumption. These intelligent redistribution measures are controlled by mobility house's charge and energy management system, chargepilot, which is based on the TenneT specification. Through the analysis of participants, the pilot project shows that in the future, electric travel can be used to flexibly control the production of renewable energy highly dependent on weather. "This reduces the pressure on the grid and helps us reduce the high cost of shutting down wind turbines," said Tim meyerjurgens, managing director of TenneT. In this way, electric travel can provide us with short-term flexibility, further expand the power grid, and occupy an important position in the process of energy transformation. " The economic potential of this initiative is worth mentioning: according to the relevant data of German energy market, in 2017 and 2018, there are more than 5 TWH excess wind power to be controlled every year. During this period, electric vehicles as intermediate storage helped reduce CO2 emissions by up to 8 million tons. For grid operators, in order to effectively integrate the small-scale decentralized electric energy of electric vehicles into grid management, they need a smart charging and energy management system similar to chargepilot. By connecting to the mobility house technology platform and the TenneT platform, which provides small-scale flexibility, the local real-time charge rescheduling control measures can be implemented. The technology used by mobility house is the same as that used in the Renault Nissan alliance project in Porto Santo. The project shows that electric vehicles can help stabilize the power grid and make an important contribution to energy transformation. Another necessary factor is that the vehicle charging technology of chademo standard must be equipped with two-way energy exchange device.