CN204989339U - Monitoring device for high -voltage electric transmission line - Google Patents

Abstract

The utility model discloses a high-voltage transmission line monitoring device, which comprises a transmission line and a pole tower. The pole tower is provided with an electric cabinet and a grounding wire connected with the transmission line. The grounding line is provided with a current monitoring module. The monitoring module is connected to the control module, the control module is connected to the communication module, the control module and the communication module are arranged in the electrical cabinet, and the control module, communication module and current monitoring module communicate with the The transmission line connection described above. The utility model monitors the current condition of the transmission line through the grounding wire, and can monitor whether the transmission line is in normal operation and the number of lightning strikes, so as to ensure the normal use of the transmission line and reduce the loss of accidents. The whole device is connected to the transmission line through an energy-taking element. The stability and practicability of the power supply are guaranteed, and the monitoring device is arranged on the tower, which is convenient for installation and high in safety, and is suitable for popularization.

Description

A high-voltage transmission line monitoring device

technical field

The utility model relates to the technical field of power grid quality monitoring, in particular to a high-voltage transmission line monitoring device.

Background technique

During the operation of high-voltage transmission lines, it is usually necessary to detect the operating parameters of each line such as voltage, current, phase, and waveform. The current practice in power systems is mostly to install current transformers on high-voltage cables, and use meters to collect operating parameters from the transformers. The main defect of this method is that the installation, disassembly and measurement of transformers are all carried out under the condition of high-voltage live, and it needs to work at heights, the safety factor is low, and even serious personal accidents are caused.

Utility model content

The problem to be solved by the utility model is to provide a high-voltage transmission line monitoring device. The grounding wire monitors the current condition of the transmission line, and can monitor whether the transmission line is in normal operation and the number of lightning strikes.

A high-voltage transmission line monitoring device, including a transmission line and a pole tower, an electrical cabinet and a grounding wire connected to the transmission line are arranged on the pole tower, a current monitoring module is set on the grounding line, and the current monitoring module and the control module The control module is connected to the communication module, the control module and the communication module are arranged in the electrical cabinet, and the control module, communication module and current monitoring module are connected to the power transmission line through an energy harvesting device.

Further, the energy harvesting device includes a high-voltage induction power harvesting device and a DC/DC power supply module.

Further, the current monitoring module includes a high-voltage current transformer, a low-voltage current transformer, a filter circuit, an A/D conversion circuit and an amplification circuit connected in sequence.

Further, the control module includes a DSP chip.

Further, the communication module includes a DTU digital transmission module.

The utility model provides a high-voltage transmission line monitoring device, which includes a transmission line and a pole tower. An electric cabinet and a grounding wire connected to the power transmission line are arranged on the pole tower. A current monitoring module is set on the grounding line. The monitoring module is connected to the control module, the control module is connected to the communication module, the control module and the communication module are arranged in the electrical cabinet, and the control module, communication module and current monitoring module communicate with the The transmission line connection described above. The current monitoring module realizes the monitoring of the current condition of the transmission line by monitoring the current condition of the grounding wire. The grounding wire is set under the transmission line by means of the tower, and the current monitoring module, including the current transformer, is set on the pole tower, which is convenient and safe to install . The control module and communication module are installed in the electrical cabinet to protect the equipment from the sun and rain. The power supply of the monitoring device is obtained from the power transmission line through the energy harvesting device, which is extremely convenient to use.

The energy harvesting device includes a high-voltage induction power harvesting device and a DC/DC power supply module. The high-voltage induction power harvesting device is a power harvesting device in the prior art and has been developed maturely. It can cooperate with the DC/DC power supply module to power off the line The monitoring device is still powered to ensure the normal operation of the equipment. The DC/DC power supply module is small in size and high in reliability, supports multiple inputs and outputs, and can be used in various occasions.

The current monitoring module includes a high-voltage current transformer, a low-voltage current transformer, a filter circuit, an A/D conversion circuit and an amplification circuit connected in sequence. The current monitoring module obtains the current information through the current transformer, and reduces the current to the value that the filter circuit can receive through the low-voltage current transformer, filters the current interference, and converts the analog quantity into Digital quantity, and then strengthen the signal through the amplification circuit to ensure that the current size of the signal conforms to the receiving range of the control module, and complete the collection of current state information of the grid line.

The control module includes a DSP chip. The DSP chip adopts a Harvard structure in which programs and data are separated, has a special hardware multiplier, widely uses pipeline operations, and provides special DSP instructions, which can be used to quickly realize various digital signal processing. algorithm.

The communication module includes a DTU digital transmission module. DTU data transmission module adopts low power consumption design, and transmits data remotely through GPRS or short message.

Beneficial effects of the utility model: the utility model monitors the current condition of the transmission line through the ground wire, and can monitor whether the transmission line is in normal operation and the number of lightning strikes, so as to ensure the normal use of the transmission line and reduce the loss of accidents. The energy components are connected to the transmission line, which ensures the stability and practicability of the power supply. The monitoring device is set on the tower, which is easy to install and has high safety, which is suitable for promotion.

Description of drawings

Below in conjunction with accompanying drawing, the utility model will be further described:

Fig. 1 is the structural representation of the utility model high voltage transmission line monitoring device;

Fig. 2 is a system structure diagram of the current monitoring module of the present invention.

detailed description

As shown in Figures 1 and 2: the utility model provides a high-voltage transmission line monitoring device, including a transmission line 2 and a pole tower 1, and an electrical cabinet 5 and a grounding wire connected to the transmission line 2 are arranged on the pole tower 1 3. A current monitoring module 4 is set on the ground wire 3, the current monitoring module 4 is connected to the control module 7, the control module 7 is connected to the communication module 6, and the control module 7 and the communication module 6 are arranged on In the electrical cabinet 5, the control module 7, the communication module 6 and the current monitoring module 4 are connected to the transmission line 2 through an energy harvesting device. The current monitoring module realizes the monitoring of the current condition of the transmission line by monitoring the current condition of the grounding wire. The grounding wire is set under the transmission line by means of the tower, and the current monitoring module, including the current transformer, is set on the pole tower, which is convenient and safe to install . The control module and communication module are installed in the electrical cabinet to protect the equipment from the sun and rain. The power supply of the monitoring device is obtained from the power transmission line through the energy harvesting device, which is extremely convenient to use.

The energy harvesting device includes a high-voltage induction power harvesting device 9 and a DC/DC power supply module 8. The high-voltage induction power harvesting device is a power harvesting device in the prior art. In case of power failure, the monitoring device is still powered to ensure the normal operation of the equipment. The DC/DC power supply module is small in size and high in reliability, supports multiple inputs and outputs, and can be used in various occasions.

The current monitoring module 4 includes a high voltage current transformer 10 , a low voltage current transformer 11 , a filter circuit 12 , an A/D conversion circuit 13 and an amplification circuit 14 connected in sequence. The current monitoring module obtains the current information through the current transformer, and reduces the current to the value that the filter circuit can receive through the low-voltage current transformer, filters the current interference, and converts the analog quantity into Digital quantity, and then strengthen the signal through the amplification circuit to ensure that the current size of the signal conforms to the receiving range of the control module, and complete the collection of current state information of the grid line.

The control module 7 includes a DSP chip. The inside of the DSP chip adopts a Harvard structure in which the program and data are separated, has a special hardware multiplier, widely adopts pipeline operation, and provides special DSP instructions, which can be used to quickly realize various digital signals. processing algorithm.

The communication module 6 includes a DTU digital transmission module. DTU data transmission module adopts low power consumption design, and transmits data remotely through GPRS or short message.

Claims (5)

1. a monitoring device for high-voltage electric transmission line, comprise transmission line of electricity and shaft tower, the ground wire described shaft tower being arranged regulator cubicle and be connected with described transmission line of electricity, it is characterized in that: described ground wire is arranged current monitoring module, described current monitoring module is connected with control module, described control module is connected with communication module, described control module and described communication module are arranged in described regulator cubicle, and described control module, communication module are connected with described transmission line of electricity by energy taking device with current monitoring module.

2. monitoring device for high-voltage electric transmission line as claimed in claim 1, is characterized in that: described energy taking device comprises high voltage induction electricity getting device and DC/DC power module.

3. monitoring device for high-voltage electric transmission line as claimed in claim 1, is characterized in that: described current monitoring module comprises the high-tension current inductor, low-voltage current mutual inductor, filtering circuit, A/D change-over circuit and the amplifying circuit that connect successively.

4. monitoring device for high-voltage electric transmission line as claimed in claim 1, is characterized in that: described control module comprises dsp chip.

5. monitoring device for high-voltage electric transmission line as claimed in claim 1, is characterized in that: described communication module comprises DTU digital transmission module.