Diesel generator system considering accident security and black start and starting method

Abstract

The invention discloses a diesel generator system considering accident security and black start and a starting method. The system comprises a first diesel generator unit, a second diesel generator unit, a black-start diesel generator, a black-start diesel generator outlet circuit breaker, a first black-start 380V bus power supply unit, a second black-start 380V bus power supply unit, a black-start380V bus, a black-start power supply sending-out circuit breaker and a black-start transformer. The three diesel generators are connected in parallel to provide a black-start emergency power supply for the black-start gas turbine, and the first diesel generator and the second diesel generator give consideration to an accident security power supply of the unit. The diesel generator is started as ablack-start emergency power supply and an accident security power supply by adopting different starting methods. According to the system and the method, the miniaturization of the black-start emergency diesel generator can be realized, the use efficiency of the diesel generator is improved, the cost is saved, the space is saved, the safety is good, and the system and the method can be widely applied to the design of a large-scale gas turbine accident security power supply and a black-start power supply.

Description

technical field [0001] The invention relates to the technical field of electrical design, in particular to a diesel generator system and a starting method that take into account accident safety and black start. Background technique [0002] The design specification stipulates that generator sets above 200MW need to be equipped with emergency safety power supply to ensure that important loads will not be powered off when the whole plant loses power, and to ensure the safety of equipment in the plant. Usually, a fast-starting diesel generator is selected as the emergency safety power supply. [0003] When the gas turbine is used as the power point of the black start power supply, an emergency power supply needs to be installed. The emergency power supply must not only meet the load when the unit starts normally, but also meet the impact load when the large motor of the black start gas turbine starts. There are two options for emergency power, one is energy storage equipment, a...

AI Technical Summary

Problems solved by technology

Energy storage equipment requires a large investment, covers a large area, and is difficult to implement; large-capacity diesel generators are expensive, and these are the main factors that restrict gas turbines from being used as black-start power points

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