A high-impedance AC-DC superimposed high-voltage power supply device for electric dehydration of crude oil
A high-voltage power supply, AC and DC technology, applied in the direction of output power conversion devices, electrical components, etc., can solve the problems of power supply device damage, low dehydration efficiency, and long recovery time of dehydration electric field.
Active Publication Date: 2019-05-21
PETROCHINA CO LTD +2
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to provide a high-impedance AC-DC superimposed high-voltage power supply device for electric dehydration of crude oil, in order to solve the problems of low dehydration efficiency, high impact current during the collapse of the high-voltage electric field, frequent damage and dehydration of the power supply device in traditional electric dehydration Problems such as long electric field recovery time
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[0017] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0018] Such as figure 1 As shown, the high-impedance AC-DC superimposed high-voltage power supply device for crude oil electric dehydration described in this embodiment is composed of a DC high-voltage generating circuit 1 and an AC high-voltage generating circuit 2; the DC high-voltage generating circuit 1 is composed of a DC voltage regulating unit 3 , current-limiting reactor 4, step-up transformer 5, high-voltage rectification unit 6 and high-voltage capacitor 7. After the AC220V AC power is output to the current-limiting reactor through the DC voltage regulating unit, the low voltage is raised to high voltage through the step-up transformer, and then passed through T...
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The present invention relates to the field of the oil field gathering and transportation dehydration technology, especially to a high-impedance alternating current and direct current superposition high-voltage power supply device for crude oil electric dehydration. The device comprises two high-voltage generation loops; a direct current high-voltage generation loop is formed by an alternating current voltage regulation module, a current limitation reactor, a boosting transformer and a high-voltage rectification unit, and outputs high-voltage direct current between an output end HVout1 and an output end HVout 2; an alternating current high-voltage generation loop is formed by an alternating current voltage regulation module, a current limitation reactor and a boosting transformer, and outputs the alternating current high voltage between the output end HVout 2 and a GND; and the two high-voltage generation loops output high-voltage waveform of direct current superposition alternating current between the HVout 1 and the GND through a series superposition mode. The formation of stable conductive water ripple in a high water content crude oil emulsion may be effectively eliminated so as to ensure the stability of a dehydration electric field, improve the dehydration efficiency of the crude oil and reduce the water content of the dehydrated crude oil.
Description
technical field [0001] The invention relates to the technical field of oilfield gathering, transportation and dehydration, in particular to a high-impedance AC-DC superimposed high-voltage power supply device for electric dehydration of crude oil. Background technique [0002] In the process of crude oil extraction, electric dehydration is the final treatment link before crude oil is extracted and exported, and it is an important guarantee for the export of qualified crude oil and the reduction of oil content in water after oil-water separation. At present, AC / DC dehydrators are commonly used in oil fields, and the dehydrators can only output a single DC or AC. As the oilfield enters the stage of high water-cut production, especially after the large-scale fracturing technology is adopted in the oilfield, the impurities carried by the produced fluid increase, which leads to an increase in the conductivity of the crude oil and a significant increase in the dehydration current,...
Claims
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IPC IPC(8): H02M11/00
CPCH02M11/00
Inventor 李学军李玉春刘增赵忠山刘学李娜
Owner PETROCHINA CO LTD