Power supply method, device, device and medium for sensors integrated in transmission lines
A technology of transmission lines and power supply methods, applied in the field of electric power, can solve problems such as failure to start, large fluctuation range of alternating current, large fluctuation of sensor power supply voltage, etc., and achieve the effect of solving the problem of excessive or too small power supply voltage
Active Publication Date: 2022-04-15
CHINA SOUTHERN POWER GRID DIGITAL GRID RES INST CO LTD +1
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Problems solved by technology
[0003] Under normal circumstances, the transmission line will adjust the power transmission capacity according to the power load. Therefore, in the case of large fluctuations in the power load, it will lead to a large fluctuation range of the alternating current, which in turn will lead to large fluctuations in the power supply voltage provided to the sensor.
[0004] However, in the traditional technology, if the wire current changes suddenly in a short period of time, the power supply voltage provided to the sensor will be too large or too small, resulting in damage to the sensor, startup failure or forced sleep
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[0039] In order to make the purpose, technical solution and advantages of the present application clearer, the present application 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 application, and are not intended to limit the present application.
[0040] In traditional technology, the output of the energy harvesting module usually adds a DC power supply-DC power supply (Directcurrent-Direct current, DC-DC) conversion circuit, and the pulse width modulation output of the energy harvesting module is set through the DC-DC conversion circuit. The duty cycle of the signal is used to ensure the stability of the working voltage of the sensor. The pulse width modulation signal can be a voltage signal, and the duty cycle is equal to the ratio of the duration of the high level voltage to the period of the pulse width modulatio...
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The present application relates to a power supply method, device, computer equipment, storage medium and computer program product for sensors integrated in power transmission lines. The method includes: obtaining the first voltage of the energy storage circuit; adjusting the current duty cycle of the pulse width modulation signal according to the first voltage; wherein, the current duty cycle is used to control the on-off of the switch element, and the switch element is turned on In the case of , the energy storage circuit supplies power to the sensor, and in the case of the switch element being disconnected, the filter circuit supplies power to the sensor and the energy storage circuit. This method can solve the problems in the traditional technology that if the wire current changes suddenly in a short period of time, the power supply voltage provided to the sensor is too large or too small, thus causing damage to the sensor, failure to start or forced sleep.
Description
technical field [0001] The present application relates to the field of electric power technology, in particular to a power supply method, device, computer equipment, storage medium and computer program product for sensors integrated in power transmission lines. Background technique [0002] At present, many sensors are installed in the power grid to intelligently monitor the wires of the transmission line. The sensor is usually powered by electromagnetic induction energy harvesting, that is, the sensor is powered by the energy harvesting module. The energy harvesting module mainly includes an induction energy harvesting coil, a magnetic core, and a rectification filter circuit. When the alternating current in the wire passes through the energy harvesting coil, a voltage will be induced, and the voltage is rectified and filtered, and the DC-DC conversion circuit processes the voltage to supply power to the sensor. . [0003] Under normal circumstances, the transmission line...
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IPC IPC(8): H02J7/34H02J7/00H02J50/10
CPCH02J7/345H02J7/007182H02J50/10H02J2207/50
Inventor 李鹏王志明田兵杨泽明樊灵孟韦杰李立浧徐振恒姚森敬谭则杰
Owner CHINA SOUTHERN POWER GRID DIGITAL GRID RES INST CO LTD