Power supply semi-trailer for electric drive fracturing equipment
View Patent ↗The present invention discloses a power supply semi-trailer for electric drive fracturing equipment, including a combination of a gas turbine engine, a generator and a rectifying unit, the generator outputs a winding configuration and a voltage required for the rectifying units directly to obviate conventional rectifier transformer equipment. The rectifying unit is connected to the inversion unit through a common DC bus, so that the common DC bus can separately drive multiple inversion units, thus decreasing the wirings of power supply lines. A high voltage inversion unit is disposed on a gooseneck of the electric drive semi-trailer to optimize the spatial arrangement of equipment. The entire power supply equipment has a compact structure, occupies a small area, and is simple in wiring.
1. A power supply semi-trailer for electric drive fracturing equipment, comprising:
a power supply semi-trailer body,
a gas turbine engine,
a generator, and
a plurality of rectifying units,
wherein the gas turbine engine and the generator are arranged on the power supply semi-trailer body,
a first end of the generator is connected to the gas turbine engine and a second end of the generator is connected to the rectifying units, and
the generator is configured to output a voltage to the rectifying units directly without passing through a rectifier transformer.
2. The power supply semi-trailer of claim 1 , wherein the generator is a double-winding generator.
3. The power supply semi-trailer of claim 2 , wherein the double-winding generator has a phase difference of 30° and a winding configuration of type Y-Y or type D-D.
4. The power supply semi-trailer of claim 1 , wherein the generator has a power of at least 10 MVA, and a frequency of 50-60 Hz or 100-120 Hz.
5. The power supply semi-trailer of claim 1 , wherein the rectifying units have voltages ranging from 4000 VDC to 6500 VDC.
6. The power supply semi-trailer of claim 1 , wherein the plurality of rectifying units comprise a plurality of sets of rectifying units arranged side by side.
7. An electric drive fracturing equipment, comprising:
the power supply semi-trailer of claim 6 and a plurality of sets of inversion units,
wherein the rectifying units are connected to the inversion units through common DC buses.
8. The electric drive fracturing equipment of claim 7 , further comprising a plurality of sets of fracturing semi-trailers comprising a plurality of fracturing semi-trailer bodies respectively,
wherein the plurality of sets of inversion units are on the fracturing semi-trailer bodies respectively.
9. The electric drive fracturing equipment of claim 8 , wherein each set of the inversion units comprises two inverters, and the inverters are three-level inverters.
10. The electric drive fracturing equipment of claim 8 , wherein the inversion units are high voltage inversion units, and each of the plurality of sets of the inversion units is arranged on a gooseneck of one of sets of the fracturing semi-trailers.
11. The electric drive fracturing equipment of claim 8 , further comprising an electric motor and a plunger on each of the fracturing semi-trailer bodies,
wherein each of the inversion units is connected to the electric motor and the electric motor is connected to a plunger pump.
12. A fracturing method, comprising:
providing a power supply semi-trailer body,
providing a gas turbine engine,
providing a generator, and
providing a plurality of rectifying units,
wherein the gas turbine and the generator are arranged on the power supply semi-trailer body,
a first end of the generator is connected to the gas turbine engine and a second end of the generator is connected to the rectifying units, and
the generator is configured to output a voltage to the rectifying units directly without passing through a rectifier transformer.
13. The fracturing method of claim 12 , wherein the generator is a double-winding generator.
14. The fracturing method of claim 13 , wherein the double-winding generator has a phase difference of 30° and a winding configuration of type Y-Y or type D-D.
15. The fracturing method of claim 12 , wherein the generator has a power of at least 10 MVA, and a frequency of 50-60 Hz or 100-120 Hz.
16. The fracturing method of claim 12 , wherein the rectifying units have voltages ranging from 4000 VDC to 6500 VDC.
17. The fracturing method of claim 12 , wherein the plurality of rectifying units comprise a plurality of sets of rectifying units arranged side by side.
18. The fracturing method of claim 12 , further comprising:
providing a plurality of sets of fracturing semi-trailers, comprising a plurality of fracturing semi-trailer bodies respectively,
providing a plurality of sets of inversion units on the plurality of fracturing semi-trailer bodies respectively,
wherein each set of the inversion units comprises two inverters, the inverters are three-level inverters, and the rectifying units are connected to the inversion units through common DC buses.
19. The fracturing method of claim 18 , wherein the inversion units are high voltage inversion units, and each of the plurality of sets of the inversion units is arranged on a gooseneck of one of sets of the fracturing semi-trailers.
20. The fracturing method of claim 18 , further comprising an electric motor and a plunger on each of the fracturing semi-trailer bodies,
wherein each of the inversion units is connected to the electric motor and the electric motor is connected to a plunger pump.