CN203116767U - Power transmission line on-line monitoring system based on distributed energy acquisition - Google Patents

Abstract

The utility model discloses an online monitoring system for transmission lines based on distributed energy acquisition, which belongs to the technical field of online monitoring for transmission lines. The transmission line on-line monitoring system includes the transmission line on-line monitoring system installed on the tower and the wireless communication forwarding unit installed on the wire. The transmission line online monitoring system installed on the tower includes several sensors, a monitoring host, a storage battery, a solar charge controller, a solar panel, a zigbee module A, a GPRS module A and an antenna. The wireless communication forwarding unit installed on the wire includes an energy-taking device, a conditioning/storage circuit, a zigbee module B, a GPRS module B and an antenna. The utility model uses the magnetic field energy of the power transmission line to supply power to the wireless communication module with the largest energy consumption, reduces energy consumption, and ensures that the working time of the storage battery can be extended without supplementing the solar radiation energy.

Description

Transmission Line Online Monitoring System Based on Distributed Energy Harvesting

technical field

The utility model belongs to the technical field of on-line monitoring of transmission lines, and relates to an on-line monitoring system of transmission lines based on distributed energy acquisition.

Background technique

my country's power grid covers a wide area, and the distance of transmission lines is long. The total length of transmission lines with a voltage level above 110KV exceeds 600,000 kilometers. The impact of uncertain factors such as man-made damage (theft, destruction) has always been the main factor threatening the safe operation of the power grid. Therefore, it is necessary to carry out real-time online monitoring and early warning of the operating status of high-voltage transmission lines to ensure its safe operation.

Since the erection site of the transmission line is usually far away from the city, the area passing by is sparsely populated and the terrain is complex, and the communication methods that can be used are limited. Currently, the communication methods used for online monitoring of transmission lines generally use GPRS/CDMA/SMS, etc.

Transmission line on-line monitoring equipment and communication equipment can only use solar energy, electromagnetic energy, and micro-power wind power to supplement energy for batteries due to the special working environment. However, these energy supply methods are easily affected by the application environment, and the collection power is generally small. Therefore, it is impossible to ensure that the on-line monitoring equipment of the transmission line can work for a long time. Prolonging the working time of sensing nodes by using lithium batteries and increasing battery capacity is one of the ways to solve the power supply for online monitoring equipment of transmission lines. But studies show that the capacity of batteries will not increase transformatively in the foreseeable future. In the past three decades, the capacity per unit volume of the battery has only increased by less than four times, and the battery technology lags far behind the development speed of the processor technology, and is further pulled away at a rate of 20% to 30% per year. Therefore, how to make full and reasonable use of the energy of the battery is a core problem to be solved urgently in the transmission line online monitoring system.

At present, the online monitoring system of transmission lines mostly adopts the method of storage battery + solar panel as the energy supply unit of the online monitoring system of transmission lines. China Southern Power Grid stipulates that under the condition of continuous no sunlight and no other power supplement, the storage battery should at least maintain the terminal 30 days of power supply for normal operation of the device. The actual situation is under the conditions that need to be monitored (such as ice-covered lines in winter), and in order to meet the needs of monitoring, it is necessary to increase the sampling speed, and the corresponding increase in energy consumption. In order to meet the requirements of power supply for 30 days, it is necessary to configure a battery with a large capacity.

The parameters that need to be monitored by the transmission line online monitoring system include wire tension, wire inclination, wire temperature, ambient temperature at the monitoring point, humidity, wind speed, wind direction, air pressure, sunshine intensity, rainfall, leakage current, etc. There are many sensors involved, except wire temperature measurement The sensors are placed on the high-potential wires, and the rest of the sensors and on-line monitoring devices are placed on the transmission towers at the ground potential.

The energy consumption of the transmission line online monitoring system is mainly divided into three major parts, sensor power consumption, monitoring main CPU power consumption, and wireless communication unit power consumption. Among them, the wireless communication unit consumes the most power. For example, the maximum operating current of the GPRS module model TGM8800 is 450mA, while the tension sensor is only 28mA, and the operating current of other sensors is basically within 30mA.

Utility model content

The purpose of this utility model is to overcome the shortcomings and deficiencies of the prior art, and provide an online monitoring system for transmission lines based on distributed energy acquisition. On-line monitoring of transmission lines and upgrading of existing online monitoring systems for transmission lines.

The purpose of this utility model is achieved through the following technical solutions:

An on-line monitoring system for transmission lines based on distributed energy acquisition includes an on-line monitoring system for transmission lines installed on towers and a wireless communication forwarding unit installed on wires.

The transmission line online monitoring system installed on the tower includes several sensors, monitoring host, storage battery, solar charge controller, solar panel, zigbee module A, GPRS module A and antenna. The solar panel, solar charge controller and monitoring host are connected in sequence; the storage battery and solar charge controller are connected to each other; the sensor, zigbee module A and GPRS module A are respectively connected to the monitoring host; zigbee module A and GPRS module A use independent antenna.

The wireless communication forwarding unit installed on the wire includes an energy-taking device, a conditioning/storage circuit, a zigbee module B, a GPRS module B and an antenna. The energy harvesting device, conditioning/storage circuit and zigbee module B are connected in sequence; the energy harvesting device, conditioning/storage circuit and GPRS module B are connected in sequence; the zigbee module B and GPRS module B are connected to each other; the zigbee module B and GPRS module B use independent antenna.

The output energy of the solar cell panel cannot be directly stored in the storage battery or used by the monitoring host; the solar cell panel realizes its maximum output power tracking control through the solar charge controller, and stores the output energy in the storage battery, and at the same time provides Monitor host power supply.

The monitoring host is configured with a zigbee module A and a GPRS module A at the same time.

The zigbee module A is responsible for short-distance data communication and exchanges data with the zigbee module B.

The GPRS module A is in the closed state under normal circumstances, and only when the zigbee module A loses contact with the zigbee module B, such as a power outage, a module failure, etc., the GPRS module A starts as a backup communication device and data Center Communications.

The energy harvesting device is used to obtain the electric field energy or magnetic field energy around the wire, and the energy harvesting devices have different structures and installation methods for different acquisition methods.

The conditioning/storage circuit is used for output conditioning (filtering, shaping, protection, boosting, bucking, etc.) of the energy-taking device, provides power for zigbee module B and GPRS module B, and stores excess power.

The GPRS module B performs data communication with the zigbee module B through the serial port, and the zigbee module B sends the data sent by the zigbee module A to the GPRS module B through the serial port, and then forwards it to the data center by the GPRS module B.

The data of the transmission line online monitoring system is realized through the short-distance wireless communication technology zigbee. Since zigbee has the characteristics of short-distance transmission and low power consumption, and the transmission distance is directly related to energy consumption and signal sensitivity, the transmission line installed on the tower The distance between the on-line monitoring system and the wireless communication forwarding unit installed on the wire should not be too far, combined with the design specifications of the transmission line, and taking into account the conditions of the transmission lines of each voltage level, the installation position of the wireless communication forwarding unit is on the wire to the center of the distance line At a distance of 5-10 meters, the transmission line on-line monitoring system is installed at the cross-arm position of the pole tower, so that the distance between the transmission line on-line monitoring system installed on the pole tower and the wireless communication forwarding unit installed on the wire will not exceed 30 meters , can reduce zigbee communication power consumption.

In order to prolong the working time of the transmission line on-line monitoring system without solar radiation to supplement the battery power, the utility model adopts the method of placing the wireless communication module with the largest power consumption on the high-potential wire in combination with the environmental energy characteristics of the transmission line. It is powered by a magnetic field or an electric field. The electromagnetic energy capacity density around the transmission line conductor is large and is not affected by natural conditions such as rain, snow, sunshine and other factors, which can provide sufficient power for the wireless communication module installed on it. energy of.

Since the transmission line online monitoring system reduces a major energy-consuming component, the battery only needs to supply power for each sensor, monitoring host and zigbee module, and its working time can be extended under the same working mode.

The above-mentioned GPRS module A or GPRS module B can also be replaced by a CDMA module or an SMS module and other wireless communication modules.

The above-mentioned on-line monitoring system of transmission lines based on distributed energy acquisition can be used for on-line monitoring of transmission lines, as well as upgrading and transformation of existing on-line monitoring systems of transmission lines.

Compared with the prior art, the utility model has the following advantages and effects:

The utility model makes full use of the energy of the magnetic field under the environment of the transmission line to supply power for the wireless communication module with the largest energy consumption; due to the reduction of energy consumption, the working time of the storage battery can be extended without supplementing the solar radiation energy under extreme weather conditions .

Description of drawings

Figure 1 is a schematic diagram of an on-line monitoring system for transmission lines installed on a tower.

Fig. 2 is a schematic diagram of a wireless communication forwarding unit installed on a wire.

Detailed ways

The utility model will be further described in detail below in conjunction with the embodiments and accompanying drawings, but the implementation of the utility model is not limited thereto.

Example 1

The transmission line on-line monitoring system based on distributed energy acquisition includes the transmission line on-line monitoring system installed on the tower and the wireless communication forwarding unit installed on the wire.

The transmission line online monitoring system installed on the tower is shown in Figure 1, including several sensors, monitoring host, battery, solar charge controller, solar panel, zigbee module A, GPRS module A and antenna. The solar panel, solar charge controller and monitoring host are connected in sequence; the storage battery and solar charge controller are connected to each other; the sensor, zigbee module A and GPRS module A are respectively connected to the monitoring host; zigbee module A and GPRS module A use independent antenna.

The wireless communication forwarding unit installed on the wire is shown in Figure 2, including energy harvesting device, conditioning/storage circuit, zigbee module B, GPRS module B and antenna. The energy harvesting device, conditioning/storage circuit and zigbee module B are connected in sequence; the energy harvesting device, conditioning/storage circuit and GPRS module B are connected in sequence; the zigbee module B and GPRS module B are connected to each other; the zigbee module B and GPRS module B use independent antenna.

The output energy of the solar battery cannot be directly used by the monitoring host; the solar panel realizes the tracking control of its maximum output power through the solar charge controller, stores the output energy in the battery, and supplies power for the monitoring host at the same time. The monitoring host is equipped with zigbee module A and GPRS module A at the same time. The zigbee module A of the transmission line online monitoring system installed on the tower is responsible for short-distance data communication and exchanges data with the zigbee module B. GPRS module A is in the closed state under normal circumstances, only when zigbee module A loses contact with zigbee module B, it starts to communicate with the data center as a backup communication device.

The energy harvesting device is used to obtain the electric field energy or magnetic field energy around the wire, and the energy harvesting device has different structures and installation methods for different acquisition methods. The conditioning/storage circuit is used for conditioning the output of the energy harvesting device (filtering, shaping, protection, boosting, bucking, etc.), providing power for zigbee module B and GPRS module B, and storing excess power. GPRS module B performs data communication with zigbee module B through the serial port, and zigbee module B sends the data sent by zigbee module A to GPRS module B through the serial port, and then forwards it to the data center by GPRS module B.

The installation position of the wireless communication forwarding unit installed on the wire is 5 to 10 meters away from the wire clamp in the direction of the center of the distance from the wire. The online monitoring system of the transmission line on the tower is installed at the cross-arm position of the tower, so it is installed on the tower. The distance between the transmission line on-line monitoring system and the wireless communication forwarding unit installed on the wire will not exceed 30 meters.

The above-mentioned GPRS module A or GPRS module B can also be replaced by a CDMA module or an SMS module and other wireless communication modules.

The on-line monitoring system for transmission lines based on distributed energy acquisition can be used for on-line monitoring of transmission lines, as well as upgrading and transformation of existing on-line monitoring systems for transmission lines.

The above-mentioned embodiment is a preferred implementation mode of the present utility model, but the implementation mode of the present utility model is not limited by the above-mentioned embodiment, and any other changes, modifications and substitutions made without departing from the spirit and principle of the present utility model , combination, and simplification, all should be equivalent replacement methods, and are all included in the protection scope of the present utility model.

Claims (8)

1. An on-line monitoring system for transmission lines based on distributed energy acquisition, characterized in that it includes an on-line monitoring system for transmission lines installed on the tower and a wireless communication forwarding unit installed on the wire; The described transmission line on-line monitoring system installed on the pole tower includes several sensors, monitoring host computer, accumulator, solar charge controller, solar panel, zigbee module A, GPRS module A and antenna; Solar panel, solar charge controller and The monitoring host is connected in turn; the battery and the solar charge controller are connected to each other; the sensor, zigbee module A and GPRS module A are respectively connected to the monitoring host; zigbee module A and GPRS module A use independent antennas; The described wireless communication forwarding unit installed on the wire comprises an energy-taking device, a conditioning/storage circuit, a zigbee module B, a GPRS module B and an antenna; the energy-taking device, the conditioning/storage circuit and the zigbee module B are connected in sequence; the energy-taking device , the conditioning/storage circuit and the GPRS module B are connected in turn; the zigbee module B and the GPRS module B are connected to each other; the zigbee module B and the GPRS module B use independent antennas respectively. 2. The transmission line online monitoring system based on distributed energy acquisition according to claim 1, characterized in that: The solar panel realizes its maximum output power tracking control through the solar charge controller, stores the output energy in the storage battery, and supplies power for the monitoring host at the same time; The monitoring host is configured with a zigbee module A and a GPRS module A at the same time. 3. The transmission line online monitoring system based on distributed energy acquisition according to claim 1, characterized in that: The zigbee module A is responsible for short-distance data communication and exchanges data with the zigbee module B. 4. The transmission line online monitoring system based on distributed energy acquisition according to claim 1, characterized in that: The GPRS module A is normally closed, and only when the zigbee module A loses contact with the zigbee module B, the GPRS module A starts to communicate with the data center as a backup communication device. 5. The transmission line online monitoring system based on distributed energy acquisition according to claim 1, characterized in that: The energy harvesting device is used to obtain electric field energy or magnetic field energy around the wire; The conditioning/storage circuit is used for output conditioning of the energy-taking device, provides power for the zigbee module B and the GPRS module B, and stores excess electricity. 6. The transmission line online monitoring system based on distributed energy acquisition according to claim 1, characterized in that: The GPRS module B performs data communication with the zigbee module B through the serial port, and the zigbee module B sends the data sent by the zigbee module A to the GPRS module B through the serial port, and then forwards it to the data center by the GPRS module B. 7. The transmission line online monitoring system based on distributed energy acquisition according to claim 1, characterized in that: The installation position of the wireless communication forwarding unit is 5 to 10 meters away from the line clamp in the direction of the center of the distance on the wire, and the transmission line on-line monitoring system is installed at the cross arm of the pole tower. 8. The transmission line online monitoring system based on distributed energy acquisition according to claim 1, characterized in that: The GPRS module A or GPRS module B is replaced by a CDMA module or an SMS module.

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