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Method for utilizing black-start diesel generator to be doubled as safety source diesel generator

A technology for diesel generators and security power supplies, which is applied to electrical components, circuit devices, AC network circuits, etc., and can solve problems such as high cost, land occupation of power plants, and low probability of use

Active Publication Date: 2014-09-24
POWERCHINA FUJIAN ELECTRIC POWER SURVEY & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, whether it is a diesel generator for security power supply or a diesel generator for black start, the probability of use is low, occupying the land of the power plant, and the cost is high

Method used

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  • Method for utilizing black-start diesel generator to be doubled as safety source diesel generator

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Embodiment Construction

[0021] Best embodiment:

[0022] Reference attached figure 1 , The method of using a black start diesel generator as a safety power source diesel generator includes the following steps:

[0023] 1. Cancel the small-capacity diesel generator for the safety power supply, but retain the 400V power distribution section for the safety power supply;

[0024] 2. Calculate the capacity of the diesel generator for black start and reselect the capacity of the diesel generator for black start;

[0025] 3. Set up a 6 (or 6.3) / 0.4kV or 10 (or 10.5) / 0.4kV black start to safety step-down transformer, the transformer capacity meets the load requirements of the safety power supply;

[0026] 4. Connect the high-voltage side of the black-start step-down transformer to the outlet of the black-start diesel generator through a 6kV or 10kV medium voltage switch;

[0027] 5. Connect the low-voltage side of the black-start step-down transformer to the 400V power distribution section for the security power suppl...

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Abstract

The invention relates to the switch-over and sharing technology of diesel generators in a power station, in particular to a method for utilizing a black-start diesel generator to be doubled as a safety source diesel generator. According to the method, the safety source diesel generator is removed, a black-start conversion safety step-down power distribution unit is set to step down the voltage of an outlet of the black-start diesel generator so as to be supplied to a safety source load for use, and therefore the black-start diesel generator can be doubled as the safety source diesel generator; when the safety source is needed, the safety source diesel generator is changed to be the black-start diesel generator for starting, the 400V power distribution segment with the safety source is operated, and after functions for the safety source are completed, black-start is performed according to the subsequent instructions. The method has the advantages that repeated setting of the diesel generator of the black-start power station can be avoided, the number and volume of the diesel generators are reduced, the utilization rate of the diesel generator is improved, the number of generators and the running cost are greatly reduced, cost is effectively reduced, the area occupied by the power station is reduced, and running maintenance caused by decreasing of the number of the diesel generators in the future is reduced.

Description

Technical field [0001] The invention relates to a conversion and sharing technology of diesel generators in power plants, in particular to a method of using a diesel generator for black start as a diesel generator for safety power supply. Background technique [0002] In large-capacity power plants, it is usually necessary to install diesel generators for security power supply. In this way, in the event of a plant-wide power outage or a unit loss of auxiliary power, in order to ensure the safe shutdown of the unit and avoid equipment and personal safety, the security power supply is used Diesel generators can provide security power in the event of an accident to ensure safe shutdown of the power plant. At the same time, according to the requirements of the power grid system, some large-capacity power plants also serve as black-start power plants. The black-start power plant refers to the use of the power plant’s own equipment to automatically start the power plant without relying...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 李宁凯罗湘梅陈增华刘勇王致珍杨保硫周健王礼伟
Owner POWERCHINA FUJIAN ELECTRIC POWER SURVEY & DESIGN INST CO LTD
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