Unit 4 of Grokrotzenburg Power Station, commissioned in 1977 as a peak load (power plants that generally run only when there is a high demand), was the only unit to be fuelled by natural gas and heating oil.
4 1977 Peak Load Natural Gas, Heating Oil Coal Coal Coal Coal 1 2 3 5 Grokrotenzburg Power Station consists of 5 units, of which only Unit 5 is operated regularly. Peaking power plants, also known as peaker plants, and occasionally just "peakers", are power plants that generally run only when there is a high demand, known as peak demand, for electricity. 
