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Grid-connected system and method based on dual-machine regenerative system with power balance generator

A technology of power balance and heat recovery system, which is applied in the direction of single-network parallel feed arrangement, etc., can solve problems such as the increase of short-circuit current in the medium-voltage system of plant power, the difficulty of monitoring the flow of plant power system, and the load limit of feed water pump and steam turbine. Achieve the effects of simple electrical wiring, clear electrical wiring, and simple operation control

Active Publication Date: 2021-03-16
SHANDONG ELECTRIC POWER ENG CONSULTING INST CORP
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Problems solved by technology

[0005] After the power balance generator is connected to the plant power medium voltage system, the short-circuit current of the plant power system will usually increase significantly, and the selection of equipment will be difficult; the protection configuration will be complicated; the power flow monitoring of the plant power system will be difficult, and some equipment may appear Overload phenomenon, causing the feedwater pump turbine to be forced to limit the load

Method used

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  • Grid-connected system and method based on dual-machine regenerative system with power balance generator
  • Grid-connected system and method based on dual-machine regenerative system with power balance generator
  • Grid-connected system and method based on dual-machine regenerative system with power balance generator

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[0033] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0034] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0035] For steam turbines with low initial parameters, especially when the reheat steam temperature is not parti...

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Abstract

The invention discloses a grid-connected system based on a dual-computer regenerative system with a power balance electric generator. The grid-connected system based on the dual-computer regenerativesystem with the power balance electric generator comprises the power balance electric generator wherein the power balance electric generator is connected with a balance electric generator boosting transformer, and the balance electric generator boosting transformer, a main transformer, a station service high-voltage transformer with split winding and a main electric generator are connected with acommon node separately, wherein the main transformer is connected with a high-voltage power distribution device, the station service high-voltage transformer with split winding is connected with a starting / backup high-voltage transformer, and the starting / backup high-voltage transformer is connected with the high-voltage power distribution device. According to the technical scheme, electrical wiring is clear, running control is simple, and a station service power system running mode and a power balance electric generator running mode do not affect each other.

Description

technical field [0001] The disclosure relates to the technical field of high-parameter and large-capacity thermal power plants, in particular to a grid-connected system and method based on a dual-machine recuperation system with a power-balancing generator. Background technique [0002] The improvement of the steam parameters of the coal-fired power generation unit can obtain higher cycle efficiency and further reduce the coal consumption of the unit. However, with the increase of steam parameters, the degree of superheat of regenerative extraction steam increases, and the irreversible loss of heat exchange on the steam side and water side of the regenerative heater increases, which weakens the benefits brought by increasing steam parameters. For this problem, a special thermal system structure can be adopted - a dual-machine recuperation system, a dual-machine recuperation system with a heat-driven small steam turbine, which can effectively solve the reheat caused by the te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/40
CPCH02J3/40
Inventor 于明辉樊潇魏华栋李玮尹晓东苏振霞邬楠戴月涛
Owner SHANDONG ELECTRIC POWER ENG CONSULTING INST CORP
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