Method for operating installations for the production of anthropogenic and / or biogenic, methane-containing gases in the natural gas grid

摘要

Method for operating plants for the production of anthropogenic and / or biogenic, methane-containing gases in a network with combined heat and power plants (4) on a natural gas network and heat users (6), with different gas qualities for self-supply as the first area and smaller part and for the combined heat and power plants (4) as a second area and larger part, wherein at least one of the cogeneration units (4) supplies heat to at least one of the heat users (6) and generates electrical energy for a power network (5), comprising at least the steps - generation of fuel gas (BG) in at least one of the installations; - Supplying a fuel gas flow of this fuel gas (BG) in a feed unit (11), wherein the feed unit (11) includes a gas pressure control system, from which the at least one cogeneration unit (4) is charged and which is connected to the natural gas network (12); - measuring the calorific value of the fuel gas (BG) supplied to the feed unit (11); - Producing an output fuel gas stream (113) from the feed unit (11) with an output calorific value for a downstream subnet assigned at least one cogeneration unit (4), wherein the output fuel gas is a mixture of fuel gas (BG) and natural gas with a volume fraction of natural gas is between 0% and 100%; - Steady removal of the output fuel gas stream (113) from the feed unit (11), if fuel gas (BG) of the feed unit (11) is supplied, wherein the removal of the output fuel gas stream (113) takes place in an amount which is at least the amount of corresponds to the feed unit (11) supplied fuel gas flow of the fuel gas (BG), so that at least in the feed unit (11) can form no pendulum or mixing zones of fuel gas (BG) and natural gas; - Supplying the output fuel gas stream (113) in the downstream subnet assigned at least one cogeneration unit (4), which supplies heat to at least one heat user (6); and - feeding the electrical energy generated in the at least one combined heat and power plant (4) into the power grid (5), wherein the output calorific value of the output fuel gas stream (113) is calculated from quantity-weighted individual values of calorific value and volume flow of the supplied fuel gas (BG) and natural gas is determined.