A main power station for an offshore gas field platform and its application method

Abstract

The invention relates to a main power plant for an offshore gas field platform and an application method of the main power plant. The main power plant comprises a plurality of natural gas power generation systems connected in parallel and a diesel oil power generation system connected with the natural gas power generation systems in parallel. Each natural gas power generation system comprises a natural gas source and a gas power generator set communicated with the natural gas source through a first pipeline. The diesel oil power generation system comprises a diesel oil source, a diesel oil daily tank communicated with the diesel oil source through a second pipeline and a diesel power generator set communicated with the diesel oil daily tank through a third pipeline. The output end of the diesel oil power generator set is provided with a fourth pipeline for conveying the residual diesel oil in the diesel oil power generator set back to the diesel oil daily tank. The main power plant further comprises a control system for controlling the diesel oil power generation system and the natural gas power generation systems or the natural gas power generation systems to operate in a controlled mode.

Description

technical field [0001] The invention relates to an electrical device for an offshore gas field platform, in particular to a main power station for an offshore gas field platform and a usage method thereof. Background technique [0002] The traditional main power station on the offshore gas field platform uses a gas turbine generator set or a reciprocating dual-fuel generator set. When the load of the main power station on the offshore gas field platform is small, even lower than 2000-3000kW, the above two generator sets have investment and fuel costs. Defects such as high operating costs. For a gas turbine generator set, its thermal efficiency is low, that is, to generate electricity with the same power, the fuel consumed by a gas turbine generator set is far greater than that of a reciprocating dual-fuel generator set. In addition, limited by the specifications of the gas turbine generator set, the general ISO power is greater than 3500kW, so there is a long-term low-load ...

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Problems solved by technology

[0002] The traditional main power station on the offshore gas field platform uses a gas turbine generator set or a reciprocating dual-fuel generator set. When the load of the main power station on the offshore gas field platform is small, even lower than 2000-3000kW, the above two generator sets have investment and fuel costs. Defects such as high operating costs

For a gas turbine generator set, its thermal efficiency is low, that is, to generate electricity with the same power, the fuel consumed by a gas turbine generator set is far greater than that of a reciprocating dual-fuel generator set

In addition, limited by the specifications of the gas turbine generator set, the general ISO power is greater than 3500kW, so there is a long-term low-load operation condition of the gas turbine generator set, which makes the thermal efficiency of the gas turbine generator set lower, that is, the gas turbine generator set The energy efficiency of the flat generator set is low

For reciprocating dual-fuel generator sets, diesel ignition is required for their operation, so there are disadvantages such as high operating costs

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