Underground direct-current power supply device and method
A DC power supply and DC voltage technology, applied in circuit devices, emergency protection circuit devices, output power conversion devices, etc., can solve the problems of poor reliability, high cost, limited application occasions, etc., and achieve low switching stress and low loss. , low cost effect
Inactive Publication Date: 2021-01-15
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology
[0007] Aiming at the defects and improvement needs of the prior art, the present invention provides an downhole DC power supply device to solve the technical problems of high cost, poor reliability and limited application occasions in the existing downhole DC power supply device
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[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0035] see figure 1 , combined with figure 2 , The present invention provides an underground DC power supply device, including: a power-taking module, a rectification and filtering module, a voltage stabilization control module, and a battery module.
[0036] The power extraction module extracts AC voltage from the stator winding of the motor, and transmits it to the rectification and filteri...
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The invention discloses an underground direct-current power supply device and method. The device comprises a power taking module, a rectifying and filtering module, a voltage stabilization control module and a battery module. The power taking module extracts alternating current voltage from a stator winding of a motor and transmits the alternating current voltage to the rectifying and filtering module; the rectification and filtering module converts the alternating current voltage into direct current voltage and then transmits the direct current voltage to the voltage stabilization control module. The direct current voltage output by the voltage stabilization control module and the direct current voltage output by the battery module are connected in parallel and transmitted to a load, anduninterrupted power supply to the load is achieved. On the basis of fully knowing the internal structure of the underground motor and the power supply requirement of instruments, the characteristic that the winding is electrified during operation of the underground motor is combined, electricity is directly taken from the motor winding, the size of a power device can be reduced and the cost can bereduced due to the low voltage class, the underground instruments are powered through batteries when the motor does not work, and low-cost and long-time stable power supply is realized.
Description
technical field [0001] The invention belongs to the technical field of downhole power supply, and more specifically relates to an downhole DC power supply device and method. Background technique [0002] With the continuous improvement of downhole modernization in oil and gas fields, more and more sensors and control actuators are used in downhole logging tools and control tools, and the requirements for reliability, safety and continuity of downhole power supply systems are getting higher and higher. Currently, there are three main methods of powering downhole tools: [0003] One is battery powered. Most of the batteries are high-performance lithium batteries, which have the advantages of compact structure and convenient installation. However, due to the influence of high temperature and high pressure underground, the continuous working time is short, and gradually cannot meet the needs of deep wells for long-term continuous power supply. In the case of limited capacity, ...
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IPC IPC(8): H02J9/06H02H7/18H02M7/04H02M3/158H02M1/14
CPCH02J9/061H02J9/066H02H7/18H02M7/04H02M3/1582H02M1/14
Inventor 王晋陈政周理兵陈庆
Owner HUAZHONG UNIV OF SCI & TECH