High-voltage electricity taking device and method based on variable winding ratio
A power-taking device and winding ratio technology, which is applied to circuit devices, conversion equipment that can be converted to DC without intermediate conversion, electrical components, etc., can solve problems such as low reliability of power taking and difficulty in stable operation of intelligent monitoring equipment
Inactive Publication Date: 2021-05-28
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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[0004]
However, in the existing high-voltage power extraction technology based on current transformers, the reliability of power extraction is relatively low when the current of the high-voltage transmission line is too large or too small, which makes it difficult for intelligent monitoring equipment to operate stably
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[0031] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.
[0032] With the development of power systems and the complexity of transmission lines, the application of monitoring equipment for high-voltage transmission lines continues to deepen. However, due to the inherent high voltage level characteristics of high-voltage transmission lines and high requirements for electrical insulation, the traditional low-voltage side power supply method cannot Meet the power demand of high-voltage electrical equipment. Therefore, the high-voltage power extraction technology has developed rapidly, and the traditional CT power extraction method based on current transformers is the most widely used.
[0033] However, under the wide range of high-voltage transmission line current changes, this scheme has ...
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The invention relates to a high-voltage electricity taking device and method based on a variable winding ratio. The high-voltage electricity taking device comprises a current transformer and a controller. The current transformer comprises multiple stages of coils, and each stage of coil is connected with the controller through a switch; the current transformer is used for obtaining electric energy from the high-voltage power transmission line to supply power to a load; and the controller is used for controlling the stage number of the coil in the current transformer through the switch so as to adjust the voltage at the two ends of the load. According to the technical scheme provided by the embodiment of the invention, the reliability of high-voltage power taking can be improved, and the operation stability of the intelligent monitoring equipment is improved.
Description
technical field [0001] The present application relates to the technical field of high-voltage equipment, in particular to a high-voltage power-taking device and method based on a variable winding ratio. Background technique [0002] In order to better monitor and manage the operation of the power grid in real time, it is usually necessary to install various intelligent monitoring equipment at the end of the high-voltage transmission line. The power demand of intelligent monitoring equipment at the transmission line end. [0003] In order to realize the power supply for the intelligent monitoring equipment at the end of the high-voltage transmission line, at present, the high-voltage power-taking technology based on the current transformer is usually adopted, and the electric energy is obtained from the high-voltage transmission line through the current transformer, and then the electric energy is converted into a stable voltage source. Intelligent monitoring equipment power...
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IPC IPC(8): H02J50/10H02M5/12
CPCH02J50/10H02M5/12
Inventor 王莉来立永王历晔徐涛高强李晋伟王咸斌
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD