Power supply semi-trailer of electric drive fracturing equipment

Abstract

The invention discloses a power supply semi-trailer of electric drive fracturing equipment. The combination manner of a gas turbine engine, a power generator and a rectification unit is adopted, the power generator directly transmits the winding form and voltages needed by a rectification unit, conventional rectification transformer equipment is omitted, the rectification unit is connected with inversion units through common direct current buses, the common direct current buses can drive the multiple inversion units separately, and wiring of power supply circuits is reduced. The high-voltage inversion units are arranged on a gooseneck of the electric drive semi-trailer, and the space arrangement of the equipment is optimized. The whole power supply equipment is more compact in structure, small in occupied area and simple in wiring.

Description

technical field [0001] The invention relates to the technical field of oil and gas field exploitation, in particular to a power supply semi-trailer for electric drive fracturing equipment. Background technique [0002] At oil and gas field fracturing sites around the world, traditional fracturing equipment adopts the power transmission system configuration mode, that is, the diesel engine is connected to the gearbox to drive the fracturing plunger pump through the transmission shaft. This configuration mode has the following disadvantages: (1 ), large size and heavy weight: the diesel engine drives the gearbox to drive the fracturing plunger pump through the drive shaft, which is large in size, heavy in weight, limited in transportation, and low in power density. (2) Not environmentally friendly: Diesel engine-driven fracturing equipment will generate engine exhaust gas pollution and noise pollution during the operation of the well site. The noise exceeds 105dBA, which serio...

AI Technical Summary

Problems solved by technology

[0002] At oil and gas field fracturing sites around the world, traditional fracturing equipment adopts the power transmission system configuration mode, that is, the diesel engine is connected to the gearbox to drive the fracturing plunger pump through the transmission shaft. This configuration mode has the following disadvantages: (1 ), large size and heavy weight: the diesel engine drives the gearbox to drive the fracturing plunger pump through the drive shaft, which is large in size, heavy in weight, limited in transportation, and low in power density

(2) Not environmentally friendly: Diesel engine-driven fracturing equipment will generate engine exhaust gas pollution and noise pollution during the operation of the well site. The noise exceeds 105dBA, which seriously affects the normal life of the surrounding residents.

(3) Uneconomical: Diesel engine-driven fracturing equipment has relatively high initial purchase costs, high fuel consumption per unit power during equipment operation, and high daily maintenance costs for engines and gearboxes.

In view of the fact that the global oil and gas development equipment is developing in the direction of "low energy consumption, low noise, and low emission", the above-mentioned shortcomings of traditional fracturing equipment powered by diesel engines hinder the development of unconventional oil and gas energy to a certain extent. development process

[0003] It is a good solution to replace conventional diesel engine drive with electric drive equipment, but the conventional generator power supply solution uses a high-voltage generator, that is, a rectifier transformer is required to supply power to the rectifier unit, and the rectifier transformer is bulky, expensive, and complicated to connect

Due to the above characteristics of the rectifier transformer itself, to some extent, the power supply part of the electric drive equipment has a large volume, that is, a large area, high cost, and complicated wiring, which greatly limits the wide application of electric drive equipment.

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