Variable-frequency resonant power supply and operation method thereof
A frequency conversion resonance and power supply technology, applied in the direction of electrical components, adjusting electrical variables, high-efficiency power electronic conversion, etc., can solve problems such as unsuitable high-power DC power supply, achieve the effect of improving power supply efficiency, reducing cable impedance, and suitable for popularization and application
Pending Publication Date: 2022-02-25
BC P INC CHINA NAT PETROLEUM CORP +2
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Problems solved by technology
But this utility model is not suitable for providing high-power DC power supply to downhole instruments, motors and tools
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application example 1
[0032] Application case 1, the present invention is applied to the electric drilling tool drilling system to supply power to downhole modules such as downhole power carrier and motor signal acquisition board. Since the cable is built inside the drill pipe, in order to reduce the outer diameter of the cable, a frequency conversion coupling power supply scheme is adopted. The 25kHz high-frequency power supply is coupled on the cable from the inverter output to the motor. The rectifier power supply in the downhole instrument cabin and the downhole DC power supply module provide a DC 48V power supply. After field testing, the output voltage is 48V±200mV, and the work is stable and reliable.
[0033] Please refer to figure 1 , the first embodiment of the present invention provides a frequency conversion resonant power supply, including ground frequency conversion resonant power supply 1, downhole rectification power supply module 2, and downhole DC power supply module 3. The ground...
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The invention discloses a variable-frequency resonant power supply and an operation method thereof, and belongs to the technical field of petroleum drilling and production, the variable-frequency resonant power supply comprises a ground variable-frequency resonant power supply, an underground rectification power supply module and an underground direct-current power supply module, and the ground variable-frequency resonant power supply is powered by an AC380V / 50Hz / 3Ph power supply. Meanwhile, the invention also discloses an operation method of the variable-frequency resonant power supply. According to the variable-frequency resonant power supply, closed-loop control output is formed through the variable-frequency resonant power supply, and the power supply control system can automatically adjust the resonant frequency according to load change and line impedance change, so that the power supply always works at an optimal resonant point, the power supply efficiency is improved, the cable impedance is reduced, underground long-distance transmission power supply can be realized, and the variable-frequency resonant power supply is suitable for popularization and application.
Description
technical field [0001] The invention relates to the technical field of petroleum drilling, in particular to a frequency conversion resonant power supply and an operating method thereof. Background technique [0002] At present, most downhole instruments are powered by downhole generators or batteries in the drilling process of oil and gas production. Since downhole generators depend on other parameters such as drilling fluid flow, the power supply of downhole instruments is seriously affected. At the same time, battery power supply cannot solve the power consumption of high-power instruments. need. Stable and reliable power supply downhole seriously restricts the development of downhole electric tools and drilling automation and intelligence. [0003] In the prior art, the patent name of the utility model is variable frequency resonant power supply, application number: 00259594.X Application date: 2000.12.14, the utility model is a variable frequency resonant power supply, ...
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IPC IPC(8): H02M1/44H02M7/06H02M7/5387H02M1/42H02M3/335
CPCH02M1/44H02M7/06H02M7/53871H02M1/4258H02M3/33592Y02B70/10
Inventor 王爱国韩飞胡志坚杨晖徐丙贵卢静杨斯媛李星月乔汉肖建秋赵莉
Owner BC P INC CHINA NAT PETROLEUM CORP