Gas turbine system and coupled power system based on same and new energy power generation system

Abstract

The invention provides a gas turbine system comprising a gas compressor, a combustion chamber, a turbine and heating devices, wherein the gas compressor comprises a gas compressor cylinder and a gas compressor rotor and is used for enabling a working medium to flow between the gas compressor cylinder and the gas compressor rotor and be compressed; the combustion chamber is connected with a workingmedium output end of the gas compressor; the turbine comprises a turbine cylinder and a turbine rotor and is connected with a working medium output end of the combustion chamber; and the heating devices are arranged on the outer surfaces of the gas compressor cylinder and the turbine cylinder and used for keeping the average temperature of the gas compressor cylinder and the turbine cylinder notlower than 50% of the average temperature of the gas compressor cylinder and the turbine cylinder in the stable working state of the gas compressor cylinder and the turbine cylinder so as to increasethe starting speed of the gas turbine system. The invention further provides a coupled power system which utilizes the gas turbine system and the new energy power generation system. The new energy power generation system is provided with a new energy set, a control system, a load and a power grid.

Description

technical field [0001] The present disclosure relates to the technical field of coupled power systems in the field of new energy technologies, and in particular to a coupled power system that improves the stability of new energy systems by improving the response speed of gas turbines. Background technique [0002] With the increasing proportion of clean energy in the power system, including wind power, photovoltaic and hydropower, etc., due to the intermittent and fluctuating characteristics of new energy, its large-scale access to the power grid has brought hidden dangers to the safe and stable operation of the power system . Due to the high cost of energy storage technology, the economic efficiency of new energy systems using energy storage systems is often poor, while gas turbines have a good competitiveness in coupled power systems composed of new energy systems due to their mature technology and fast response speed. It is an important technical approach to improve the ...

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Problems solved by technology

However, due to the influence of the heat capacity of the compressor and the turbine cylinder, it takes a process to raise the temperature; the mismatch between the heat capacity of the rotor and the cylinder system leads to inconsistent deformation of the two, and the immediate loading of the centrifugal force caused by the increase in the speed of the rotor system, coupled with the influence of environmental factors etc., the starting speed of the gas turbine cannot exceed a certain limit value, otherwise there will be rubbing against static rotation, which will endanger the safe operation of the gas turbine

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