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Gas-steam combined cycle distributed energy three-power quick-cutting system and method

A distributed energy, gas steam technology, applied in the direction of emergency power supply arrangements, electrical components, circuit devices, etc., can solve the problems that cannot meet the needs of distributed energy power stations, and achieve the goals of reducing equipment investment, limiting short-circuit current, and saving floor space Effect

Pending Publication Date: 2019-11-01
XIAN THERMAL POWER RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional way of realizing fast switching system of plant power cannot meet the needs of distributed energy power plants

Method used

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  • Gas-steam combined cycle distributed energy three-power quick-cutting system and method
  • Gas-steam combined cycle distributed energy three-power quick-cutting system and method
  • Gas-steam combined cycle distributed energy three-power quick-cutting system and method

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0031] Such as figure 1 As shown, in the traditional factory power fast switching system, it is necessary to set up a special high-voltage factory transformer to provide the working incoming power, and set up a special start-up and backup transformer to provide the start-up backup power. The booster station or from a dedicated line. Gas-steam combined cycle distributed energy projects usually have centralized equipment layout, a large number of units, and a small footprint; for gas-steam combined cycle distributed energy projects, the traditional factory power fast switching system has the following shortcomings: the fast switching system needs to be set up separately For high-voltage plant transformers, start-up and backup transformers, and closed busbars, the system occupies a large area a...

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Abstract

The invention discloses a gas-steam combined cycle distributed energy three-power quick-cutting system and method. The system comprises three units, each unit is provided with a high-voltage factory busbar and a working power supply incoming line for providing a working incoming line power source, the working power supply incoming line is connected with the low voltage side of the main transformerthrough a current limiting reactor, and the two ends of the current limiting reactor are connected with a high speed current limiting protection switch in parallel; different emergency power supply incoming line switches are connected between the buses for high-voltage plants of any two units, the connection condition between the buses for the high-voltage plants between the units is controlled through the on-off of the emergency power supply incoming line switches; the features of the stage distribution of the power utilization loads, many units and the small capacity of the gas-steam combined cycle distributed energy plant are fully utilized, the working power source is got from the independent low-voltage side, the dual emergency power supplies are taken from the buses of the high-voltage plants of the adjacent units to solve the problems of the large investment, the wide area and the large power angle in the existing plant power quick-cutting configuration scheme.

Description

technical field [0001] The invention belongs to the electrical design field of a gas-steam combined cycle distributed energy power station, and specifically relates to a gas-steam combined cycle distributed energy three-power fast switching system and method. Background technique [0002] The "Code for Design of Large and Medium-Sized Thermal Power Plants" stipulates that for loads that will directly affect the safety of people or important equipment due to power failure, an automatic backup power supply must be installed. In the design of the conventional factory power fast switching system, the working power is usually taken from the high-voltage factory transformer of the unit, and the backup power is taken from the separately set start-up backup transformer. Toggle between switches. There are three switching methods: normal switching, abnormal switching and accident switching. This set of fast cut-off system requires a separate high-voltage plant transformer, start-up ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J9/06H02H9/02
CPCH02J9/06H02H9/021
Inventor 牛利涛何信林彭金宁兀鹏越周峰旭吴晋罗俊然罗勇郭小勤
Owner XIAN THERMAL POWER RES INST CO LTD
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