Electric driving system of double-system petroleum drilling machine

Abstract

The invention discloses an electric driving system of a double-system petroleum drilling machine. The electric driving system comprises a three-phase alternating current bus, a direct current driving system and an alternating current driving system; the output ends of the three-wire alternating-current bus are connected with the direct current driving system and the alternating current driving system; the direct current driving system comprises a plurality of direct current speed regulation units; and the alternating current driving system comprises a plurality of rectifying units, a plurality of alternating current frequency conversion units and a plurality of energy consumption braking units. According to the electric driving system of the double-system petroleum drilling machine of the invention, the advantages of the direct current driving system and the alternating current driving system are combined; and the problems that the direct current driving system is low in power factor, narrow in speed regulation range and the like are solved, the situation that the alternating current driving system is high in cost is comprehensively considered, and the technical economy of the drilling machine is optimal.

Description

technical field [0001] The invention relates to the technical field of electric drive for oil drilling rigs, in particular to an electric drive system for dual-system oil drilling rigs. Background technique [0002] At present, electric drilling rigs (hereinafter referred to as drilling rigs) are mainly used for oil and gas development, and the electric drive system of drilling rigs is mainly divided into DC drive system and AC drive system. Both electric drive systems have their own defects: [0003] 1. Compared with the AC drive system, the DC drive system has the following defects and deficiencies: [0004] (1) The DC drive system cannot realize the auxiliary braking function, and it is necessary to configure an auxiliary braking device, such as an electromagnetic brake. The AC drive system has the function of energy consumption braking, which can realize auxiliary braking, which is safer and more reliable; since there is no need to install electromagnetic brakes or pneu...

AI Technical Summary

Problems solved by technology

The present invention adopts a dual-mode electric drive system, combines the respective advantages of the DC drive system and the AC drive system, and solves the problem of low power factor, narrow speed regulation range, low degree of automation, and inability to realize auxiliary braking and automatic drill feeding in the DC drive system. problems, and comprehensively consider the high cost of the AC drive system, so as to optimize the technical economy of the drilling rig

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