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Power station system and method for operating the same

一种发电站、设备的技术，应用在机械设备、机器/发动机、蒸汽机装置等方向，能够解决效率改善丧失等问题，达到好调谐、高总效率、减少排气温度的变化的效果

Inactive Publication Date: 2011-07-13
ALSTOM TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] A disadvantage in known power station installations with decoupling between the generator output and the network by means of a frequency converter with a DC current- or DC-voltage intermediate circuit is that the frequency converter itself brings about non-negligible power losses , which, in power plant installations with 1-shaft-turbine trains and powers greater than 100 MW, in turn loses part of the efficiency improvement obtained in this region

Method used

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  • Power station system and method for operating the same
  • Power station system and method for operating the same
  • Power station system and method for operating the same

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Embodiment Construction

[0088] exist Figure 4 shows in a very simplified circuit diagram a combined power plant according to one exemplary embodiment of the invention with a gas turbine and an electronic decoupling device as well as a steam turbine. The power plant installation 10 comprises a gas turbine 12 with a compressor 13 and a continuous combustion, wherein a first combustion chamber 15 generates hot gases with a first fuel via a first fuel supply 17, i.e. expanded in a first turbine 14a, and subsequently directed to into the second combustion chamber 15', where a second increase in temperature of the hot gas is caused with the second fuel via the second fuel supply 17', which is then expanded in the second turbine 14b. Instead of continuous combustion, which is particularly advantageous in terms of efficiency, single-stage combustion can also be provided. The rest of the power station equipment 10 corresponds to the figure 2 Or the part with the same number in 3.

[0089] The first genera...

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Abstract

The invention relates to a combined cycle power plant (10) comprising at least one shaft line (60) constituted of a steam turbine (24) and a second generator (8) which is directly driven by the steam turbine (24) and generates alternating current, the output of said generator being connected to a network (21) having a defined network frequency (F), and further comprising at least one turbine line (11) constituted of a gas turbine (12) and a first generator (18) which is directly driven by the steam turbine (12) and generates alternating current having a defined operating frequency, the output of said generator being connected to a network (21) having a defined network frequency. The combined cycle power plant is characterized in that an electronic decoupling device or a variable electronic transmission (27) is interposed between the first generator (18) and the network (21) and decouples the operating frequency from the network frequency. The power station system according to the invention allows a flexible stationary operation at a high overall efficiency and a flexible transient operation.

Description

technical field [0001] The invention relates to the field of power station technology. The invention relates to a combined power station installation, which has: an electronic decoupling device or an electronic frequency conversion device between the gas turbine and the grid, and a steam turbine directly connected to the grid through a generator. The invention also relates to a A method for operating such a power station. Background technique [0002] Large power station installations in the power range greater than 100 MW, in which electric generators producing electricity are driven by gas turbines and / or steam turbines and the electrical power produced is fed to a grid with a preset frequency (eg 50 or 60 Hz) In a grid of , these power plant installations usually have a fixed coupling between the (mechanical) rotational speed of the turbine and the grid frequency. The output of the generator is connected via a grid connection to the grid frequency fixedly (frequenzstarr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K23/10F01K13/02
CPCY02E20/16Y02E20/18F01K23/101F01K13/02F01K23/10
Inventor J·霍夫曼T·梅因德尔
Owner ALSTOM TECH LTD