The high-voltage grid is the backbone of the electricity supply system, connecting electricity producers to consumers. TenneT manages the high-voltage grid in the Netherlands and large parts of Germany. Our top priority is to ensure safe and uninterrupted transmission of electricity. Power failures must be prevented at all times. TenneT seeks to achieve this aim by continually monitoring the quality and capacity of the high-voltage grid. The grid must have sufficient transmission capacity in areas of high electricity consumption or supply. An increase in capacity can be achieved by transmitting electricity at higher voltages, or by installing cables with a greater circumference. TenneT only transmits high-voltage electricity, i.e. electricity with a voltage level of 110,000 V (110 kV) and higher. TenneT interconnects the high-voltage grid and the distribution grids at high-voltage substations or switching substations. At these ‘nodes’ in the grid, transformers are installed which convert high voltage to low voltage, suitable for households, businesses and organisations.
TenneT transmits electricity from its source (i.e. the place where it is generated) to the distribution grids, which in turn supply power to consumers. Electricity cannot be kept in reserve because of the difficulties of storing it. The balance between supply and demand must be maintained 24 hours a day and seven days a week to ensure a continuous supply of electricity. TenneT deploys regulating capacity, reserve capacity and emergency capacity to accommodate fluctuations (peaks and valleys) in supply and demand. We also collaborate with other European TSOs to compensate electricity shortages and surpluses across national borders.