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Method for supporting a mains frequency

A technology of grid frequency and energy, applied in steam engine installations, combined combustion mitigation, jet propulsion, etc., can solve problems such as reduction, and achieve the effect of improving overall efficiency

Inactive Publication Date: 2015-03-25
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, gas turbines in gas and steam turbine power plants should not be continuously operated at reduced power

Method used

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  • Method for supporting a mains frequency

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Embodiment Construction

[0018] Gas and steam power plants basically comprise steam turbines and gas turbines, wherein an electrical generator is usually coupled between the gas and steam turbines in a torque-transmitting manner. The invention is also applicable to gas and steam turbine plants having multiple shafts. Likewise, the invention can also be applied to purely steam power plants. The hot gas flow from the gas turbine is used in a steam generator to generate steam for the steam turbine. Steam turbines are generally divided into high-pressure, medium-pressure and low-pressure sub-turbines. The live steam first flows into the high-pressure sub-turbine. Downstream of the high-pressure sub-turbine, the steam flows through an intermediate reheater, where it reaches a higher temperature and then flows into the intermediate-pressure sub-turbine. Downstream of the medium-pressure sub-turbine, the steam flows into the low-pressure sub-turbine, where downstream of the low-pressure sub-turbine the st...

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Abstract

The invention relates to a method for supporting a mains frequency in an energy generation plant. Said energy generation plant is operated using unthrottled high-pressure valves, and the throttling action of the medium-pressure valves is canceled when the mains frequency drops.

Description

technical field [0001] The invention relates to a method for supporting the grid frequency of an energy generating plant comprising a steam turbine comprising a high-pressure sub-turbine and an intermediate-pressure sub-turbine, wherein an intermediate-pressure valve is arranged upstream of the intermediate-pressure sub-turbine . Background technique [0002] An embodiment of a gas and steam turbine power plant as an energy generating plant generally comprises a gas turbine, a steam turbine and a generator, which is torque-coupled to the gas turbine and the steam turbine. In the field of municipal power supply, gas turbines are mainly used in such gas and steam turbine power plants to assist the grid frequency. This is achieved by reducing the power of the gas turbine when the grid frequency increases and increasing the power of the gas turbine when the grid frequency decreases. The power of the steam turbine basically follows the power of the gas turbine with a certain de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K7/24F01K23/10
CPCF01K7/24F01K23/101Y02E20/16F01K23/10F02C9/00
Inventor 马丁·本瑙尔埃德温·戈布雷希特马蒂亚斯·霍伊
Owner SIEMENS AG