Multiphase fracturing machine set electric drive control system

Abstract

The invention belongs to the field of drive of fracturing pump sets in shale gas extraction, and particularly relates to a multiphase fracturing machine set electric drive control system. The system comprises a ring main unit, a phase-shifting transformer, a frequency converter and a nine-phase motor, wherein high voltage electricity is introduced into the ring main unit from a power grid and converted into at least two nominal-voltage secondary three-phase commutating windings and an auxiliary secondary winding through the phase-shifting transformer, the commutating windings supply power to the frequency converter, and by outputting three sets of three-phase alternating current inversely, the frequency converter drives the nine-phase motor to drive a fracturing plunger pump to work; the auxiliary secondary winding is in charge of supplying power to a control cabinet, an MCC cabinet, a transformer fan and a cooling refrigerator system, and the MCC cabinet is in charge of supplying power to an external lubricating oil circulating pump and a lubricating oil heat-dissipation cooling fan; after state information detection is conducted, the ring main unit, the transformer fan and the nine-phase motor are used for logical judgment of the control cabinet. Compared with conventional diesel / natural gas engines, the multiphase fracturing machine set electric drive control system has theadvantage that the discharging amounts of nitrogen oxides and oxycarbides are almost zero, so that the multiphase fracturing machine set electric drive control system is environmentally friendly; moreover, the energy consumption cost is reduced, and the running cost is low.

Description

technical field [0001] The invention belongs to the driving field of a fracturing pump set in shale gas exploitation, and specifically relates to an electric drive control system of a multiphase fracturing set. Background technique [0002] As the core equipment in shale gas exploitation, the fracturing pump set accounts for 25% to 30% of the total shale gas development equipment. Its quality, efficiency and operating cost will directly affect the cost of shale gas exploitation, which determines the Shale gas extraction process. In addition, oilfields need to invest a lot of manpower and material resources when performing fracturing work, which increases the production cost of oilfields. The research and development of large-scale fracturing supporting equipment plays an important role in improving the field construction level and quality control ability. Traditional fracturing vehicles generally use the transmission form of the engine to drive the fracturing pump through ...

AI Technical Summary

Problems solved by technology

In addition, oil fields need to invest a lot of manpower and material resources in fracturing work, which increases the production cost of oil fields.

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