Direct current supply system for drilling machine and control method of direct current supply system

A power supply system, DC power supply technology, applied in the parallel operation of DC power supplies, DC network circuit devices, current collectors, etc., can solve the problem of inability to provide a braking energy solution path, large DC energy storage device energy storage, compensation speed and accuracy. and other problems, to achieve the effect of eliminating strict restrictions on output voltage and frequency, reducing energy storage capacity and reducing capacity

Active Publication Date: 2014-07-23
天津中科合源电气技术有限公司
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Problems solved by technology

Chinese patent ZL200820221729.1 proposes a method of using a DC energy storage device to absorb braking energy, but since the consumed energy is far less than the regenerative braking energy in a long period of time, the required DC energy storage device has a large storage energy , the economy is low, and there may even be a problem that the energy storage is full and ca...

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  • Direct current supply system for drilling machine and control method of direct current supply system
  • Direct current supply system for drilling machine and control method of direct current supply system
  • Direct current supply system for drilling machine and control method of direct current supply system

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0037] Such as figure 1 As shown, the DC power supply system includes a DC power supply bus 30, a first generator 11, a second generator 12, a first rectifier 21, a second rectifier 22, a first inverter 51, and a second inverter 52 , third inverter 53, fourth inverter 54, fifth inverter 55, top drive motor 71, mud pump motor 72, winch motor 73, other load motors 74, domestic electric load 75, energy storage system 80. Resistance braking unit 90, and a controller 100 coupled with generators 11, 12, rectifiers 21, 22, inverters 51, 52, 53, 54, 55, energy storage system 80, and resistance braking unit 90 .

[0038] The output end of the first generator 11 is connected to the AC side of the first rectifier 21; the output end of the second generator 12 is connected to the AC side of the second rectifier 22; the AC side of the first inverter 51 is ...

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Abstract

A direct current supply system for a drilling machine comprises a direct current supply bus (30), a first electric generator (11), a first rectifier (21), a second electric generator (12), a second rectifier (22), a first inverter (51), a top drive motor (71), a second inverter (52), a slush pump motor (72), a third inverter (53), a winch motor (73), a fourth inverter (54), other motors (74), a fifth inverter (55), other loads (75) for household consumption, an energy storage unit (80), a resistance braking unit (90) and a controller (100) coupled with the electric generators, the rectifiers, the inverters, the energy storage unit and the resistance braking unit. According to the direct current supply system for the drilling machine, the working efficiency and reliability can be improved, the energy storage capacity needing to be configured can be reduced, and the cost performance is improved.

Description

technical field [0001] The invention relates to a direct current power supply system for a drilling rig and a control method thereof. Background technique [0002] At present, the oil drilling rig system is generally composed of generators, AC busbars, and motor systems. One of its outstanding features is that it has an AC bus with relatively fixed frequency and voltage amplitude. The AC bus is generally 690V, 50Hz or 60Hz. The generators are all connected to this AC bus, which will greatly limit the degree of freedom of regulation of the generator control system, because its output frequency and voltage amplitude are strictly limited. Other loads such as domestic electricity are generally powered by 380V, which is usually obtained by converting 690V power through a transformer. Drilling rigs generally include a variety of variable frequency motor drive systems such as winches, mud pumps, and top drives, all of which are connected to the AC bus. [0003] The drive system...

Claims

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Application Information

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IPC IPC(8): H02J1/00H02J1/10H02J7/34
Inventor 韦统振朱晋吴理心霍群海韩立博张桐硕
Owner 天津中科合源电气技术有限公司
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