Power transmission line monitoring device in low-temperature environment

Abstract

A low-temperature environment power transmission line monitoring device comprises a solar total radiation sensor, a battery, a temperature sensor, a resistance wire, a thermal insulation material, an electric energy conversion circuit, a relay, a solar cell panel, an MPPT circuit, a controller, a camera power supply, a communication module, a camera and a shell. The monitoring device is suitable for a low-temperature environment, when solar irradiation is strong, the controller enables the solar cell panel to be connected with the resistance wire through the MPPT circuit and the relay, the resistance wire is powered on to heat the battery, the temperature of the battery is controlled within a relatively appropriate interval, the problems that the battery cannot be charged and is fast to discharge under the low-temperature condition are solved, and the monitoring device is suitable for popularization and application. Therefore, the cruising ability of the power transmission line monitoring device is improved, and the safe and stable operation of the power transmission line is ensured.

Description

Technical Field

[0001] This utility model relates to the field of monitoring equipment technology, and in particular to a power transmission line monitoring device for low-temperature environments. Background Art

[0002] The transmission line monitoring device uses cameras to monitor the micro-meteorological conditions, tower tilt, anti-theft alarms, icing, and other line conditions of the transmission line and uploads the data to the monitoring center. The monitoring center can not only view the on-site images, but also analyze, diagnose, and predict the line's operating status in real time through the data collected from various monitoring points, and take appropriate measures to eliminate or mitigate dangers, ensuring the safe and stable operation of the transmission line.

[0003] Existing transmission line monitoring devices utilize solar cells for power, storing solar energy in batteries for operation in the absence of sunlight. However, lithium-ion batteries are significantly affected by temperature changes. At excessively low temperatures, they exhibit marked increases in internal resistance and capacity decay. Furthermore, below a certain temperature, charging the battery will instantly reach its cutoff voltage. These characteristics of lithium batteries mean that transmission line monitoring devices operating in the cold winter environments of northern my country face issues such as capacity decay and inability to recharge, ultimately leading to a lack of reliable power supply and severely impacting the safe and stable operation of transmission lines.

[0004] Based on the above reasons, a power transmission line monitoring device for low-temperature environments is proposed. Summary of the Invention

[0005] The technical solution of this utility model is as follows:

[0006] This application provides a low-temperature environment power transmission line monitoring device, including a solar total radiation sensor, a battery, a temperature sensor, a resistance wire, thermal insulation material, a power conversion circuit, a relay, a solar panel, an MPPT circuit, a controller, a camera power supply, a communication module, a camera, and a housing. The battery, temperature sensor, and resistance wire are encased in the thermal insulation material. The battery is connected to the power conversion circuit, the resistance wire is connected to the relay, the solar panel is connected to the MPPT circuit, the camera power supply and communication module are connected to the camera, the solar total radiation sensor, temperature sensor, and relay control signals are connected to the controller, and the power conversion circuit, relay, and MPPT circuit are connected to the camera power supply. The solar total radiation sensor, battery, temperature sensor, resistance wire, thermal insulation material, solar total radiation sensor power conversion circuit, relay, solar panel, MPPT circuit, controller, camera power supply, communication module, and camera are mounted within the housing.

[0007] According to the technical solution provided in the embodiments of this application, the battery, temperature sensor, and resistance wire are wrapped in heat insulation material. The heat insulation material can impede the heat flow transfer of the battery, reduce heat loss, and improve heating efficiency.

[0008] This application provides a temperature control method for a low-temperature environment transmission line monitoring device. When solar radiation is strong, the controller connects the solar panel to a resistance wire via an MPPT circuit, a relay, and a resistance wire. The resistance wire is energized and heats up the battery, thus controlling the battery temperature within a relatively suitable range. When solar radiation is weak or there is no sunlight at night, the controller controls the relay to trip, and the low-temperature environment transmission line monitoring device does not perform temperature control.

[0009] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0010] Figure 1 This is a module diagram of a low-temperature environment transmission line monitoring device provided in one embodiment of this utility model;

[0011] Figure 2 This is a flowchart illustrating the temperature control process of a low-temperature environment transmission line monitoring device according to an embodiment of this utility model. DETAILED DESCRIPTION

[0012] To make the technical means, creative features, and objectives of this utility model readily understandable, the present utility model will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present utility model, and therefore only show the components relevant to the present utility model.

[0013] refer to Figure 1This application provides a low-temperature environment power transmission line monitoring device, including a solar total radiation sensor, a battery, a temperature sensor, a resistance wire, heat insulation material, a power conversion circuit, a relay, a solar panel, an MPPT circuit, a controller, a camera power supply, a communication module, a camera, and a housing. The battery, temperature sensor, and resistance wire are encased in the heat insulation material. The battery is connected to the power conversion circuit, the resistance wire is connected to the relay, the solar panel is connected to the MPPT circuit, the camera power supply and communication module are connected to the camera, the solar total radiation sensor, temperature sensor, and relay control signals are connected to the controller, and the power conversion circuit, relay, and MPPT circuit are connected to the camera power supply. The solar total radiation sensor, battery, temperature sensor, resistance wire, heat insulation material, solar total radiation sensor power conversion circuit, relay, solar panel, MPPT circuit, controller, camera power supply, communication module, and camera are mounted in the housing.

[0014] In some embodiments, the total solar radiation sensor and the temperature sensor output voltage signals;

[0015] In some embodiments, the control signal for the relay is provided by the controller. Preferably, the controller can be designed as a digital controller with a microprocessor. The microprocessor performs analog-to-digital conversion on the voltages output by the total solar radiation sensor and the temperature sensor, compares the battery temperature with the set value, and outputs the relay control signal.

[0016] In some embodiments, the control signal for the relay is provided by a controller, which can be designed as an analog controller. A voltage comparator is designed in the controller to compare the output voltage of the temperature sensor with a reference voltage and output the relay control signal.

[0017] In some embodiments, the MPPT circuit can be a BOOST circuit or other circuits that can implement the maximum power point tracking (MPPT) function.

[0018] In some embodiments, the power conversion circuit can be a BUCK-BOOST circuit or other circuits that can realize bidirectional power flow, such as a dual active bridge (DAB).

[0019] refer to Figure 2In some embodiments, the temperature control process is as follows: To eliminate ineffective temperature control during weak radiation or at night, a total solar radiation sensor detects the solar irradiance R. When the irradiance exceeds a set threshold R1, the temperature control process begins; otherwise, no temperature control is performed. A temperature sensor measures the battery temperature and transmits it to the controller. The controller compares the actual battery temperature with a set threshold. If the actual temperature is below the threshold T1, the controller closes the relay, connecting the resistance wire to the power supply, causing the resistance wire to heat up. If the battery temperature exceeds the set threshold T2, the power supply controls the power conversion circuit, the battery begins charging, and the relay opens. Figure 2 R1, T1, and T2 can be set and corrected according to the actual local irradiance and climate conditions. It is worth noting that T2 > T1.

[0020] The above is a detailed description of the preferred embodiments of this application, but this application is not limited to the above embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this application, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A low-temperature environment transmission line monitoring device, comprising: (1) Solar total radiation sensor, (2) Battery, (3) Temperature sensor, (4) Resistance wire, (5) Thermal insulation material, (6) Power conversion circuit, (7) Relay, (8) Solar panel, (9) MPPT circuit, (10) Controller, (11) Camera power supply, (12) Communication module, (13) Camera, (14) Housing, characterized in that the battery, temperature sensor, and resistance wire are wrapped in thermal insulation material, the battery is connected to the power conversion circuit, the resistance wire is connected to the relay, the solar panel is connected to the MPPT circuit, the camera power supply and communication module are connected to the camera, the solar total radiation sensor, temperature sensor, and relay control signals are connected to the controller, the power conversion circuit, relay, and MPPT circuit are connected to the camera power supply, and the solar total radiation sensor, battery, temperature sensor, resistance wire, thermal insulation material, solar total radiation sensor power conversion circuit, relay, solar panel, MPPT circuit, controller, camera power supply, communication module, and camera are installed in the housing.

2. The low-temperature environment transmission line monitoring device according to claim 1, characterized in that, The monitoring device is suitable for low-temperature environments. When the solar radiation is strong and the battery temperature is lower than the set threshold for closing the circuit, the controller connects the solar panel to the resistance wire through the MPPT circuit and relay. The resistance wire is energized and heats up to heat the battery. The heat insulation material impedes the heat flow transfer of the battery, reducing heat loss. When the battery temperature rises above the set threshold for opening the circuit, the controller disconnects the relay and stops heating.

3. The low-temperature environment transmission line monitoring device according to claim 1, characterized in that, When solar radiation is weak or there is no sunlight at night, the controller disconnects the relay, and the low-temperature environment transmission line monitoring device does not perform temperature control.

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