Energy supply system and operating method

摘要

An energy supply system is provided with an electricity generating device for regeneratively generating electrical energy that can be fed into an electricity supply grid. The energy supply system includes an electricity generating device for regeneratively generating electrical energy which can be fed into an electricity supply grid, a hydrogen generating device for generating hydrogen using electrical energy from the regenerative electricity generating device, a methanation device for converting hydrogen generated by the hydrogen generating device and a supplied carbon oxide gas into a gas containing methane, and a gas providing device for providing a supplementary gas or a replacement gas in a variably specifiable supplementary/replacement gas quality suitable for feeding into a gas supply grid with the use of the gas containing methane from the methanation device and/or the hydrogen from the hydrogen generating device. A method of operating the system is also provided.

主权项

1. An energy supply system, comprising:
an electricity generating device for regeneratively generating electrical energy feedable into an electricity supply grid; a hydrogen generating device for generating hydrogen using electrical energy from the regenerative electricity generating device; a methanation device for converting hydrogen generated by the hydrogen generating device and a supplied carbon oxide gas into a gas containing methane; and a gas providing device for providing one of a supplementary gas and a replacement gas in a variably specifiable supplementary/replacement gas quality suitable for feeding into a gas supply grid with the use of at least one of the gas containing methane from the methanation device and the hydrogen from the hydrogen generating device, wherein
the one of the supplementary gas and the replacement gas is added to the gas supply grid when the regeneratively generated electrical energy cannot be fed into the electricity supply grid,the gas providing device is operatively configured to provide the one of the supplementary gas or replacement gas selectively in a plurality of predetermined quality levels, said plurality of predetermined quality levels comprises at least:
a first level where virtually pure hydrogen is added as a supplementary gas,a second level where a supplementary gas is added containing some methane in addition to hydrogen, anda third level where a replacement gas is added containing an enhanced amount of methane and a decreased amount of hydrogen as compared to the second level,said decreased hydrogen amount is less than 5% by volume, and the gas providing device is configured to alternatingly switch between each of the first, second, and third level.