CN115032717A - Multi-parameter sensing monitoring method and device for power transmission line - Google Patents
Multi-parameter sensing monitoring method and device for power transmission line Download PDFInfo
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Abstract
The disclosure belongs to the technical field of power transmission, and particularly relates to a multi-parameter sensing monitoring method and a multi-parameter sensing monitoring device for a power transmission line, wherein the method comprises the following steps: acquiring multi-parameter sensing monitoring data of a descending tower of a power transmission line; combining the acquired multi-parameter sensing monitoring data of the downlink tower with the multi-parameter sensing monitoring data of the current tower of the power transmission line to obtain combined multi-parameter sensing monitoring data; and the obtained combined multi-parameter sensing monitoring data is used as the multi-parameter sensing monitoring data of the uplink tower and transmitted in the uplink direction, so that the multi-parameter sensing monitoring of the power transmission line is completed.
Description
Technical Field
The disclosure belongs to the technical field of power transmission, and particularly relates to a multi-parameter sensing monitoring method and device for a power transmission line.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
The transmission line is complex in environment due to long distance and large span, is easily influenced by weather phenomena such as wind, rain and ice, and is easily influenced by various natural factors such as temperature and humidity change. Operation and maintenance personnel find that local microclimate factors (such as ice coating and the like) can cause serious damage to the overhead transmission line and even can cause collapse of a transmission tower, so that the safe and stable operation of the transmission line is seriously influenced.
In the prior art, an environment acquisition sensor is usually arranged on a tower of a power transmission line, power supply is realized through a solar cell panel, and data transmission is realized in a wireless data transmission mode; however, such an energy supply method and a data transmission method have poor effects and are easily affected by an extremely severe environment; for example, for an area with long-term haze weather conditions, a valley with a back and an underground pipeline with poor communication, the solar panel cannot stably and effectively supply power, and transmission of wireless data may be blocked.
In addition, in the prior art, the power supply and the signal transmission of the environment acquisition sensor on the tower are realized by adopting an optical fiber communication and common transmission mode; the energy and information can be transmitted simultaneously, so that the real-time sensing monitoring of the overhead line is realized; however, the distance of the power transmission line is long, the number of nodes is large, the power supply in a continuous laser mode consumes more power in the transmission process, the realization effect of the energy-information common transmission is poor, the error rate of the meteorological information after repeated relay transmission is high, and the accuracy is poor; secondly, the transmission distance of the transmission line is long, and the number of nodes is large, so that large signal intensity attenuation is caused in the transmission process, and the effective measurement distance of the transmission line is limited.
Because the related meteorological data on the transmission line are collected based on the sensing monitoring devices on a plurality of different tower positions, and a plurality of sensing monitoring devices which are distributed in a scattered way are different from each other in working voltage, signal transmission distance, operating environment, operating state and the like, after a plurality of optical signals in the plurality of sensing monitoring devices are transmitted back to the transformer substation, the optical signals respectively show different error code degrees.
Disclosure of Invention
In order to solve the problems, the present disclosure provides a multi-parameter sensing monitoring method and device for a power transmission line, which implement accurate acquisition and analysis of small-range meteorological information around an overhead power transmission line by receiving multi-parameter sensing monitoring data on a downlink tower, merging the data with data on a local tower, and then continuously transmitting the data in an uplink direction, thereby implementing monitoring and early warning on the power transmission line.
According to some embodiments, a first scheme of the present disclosure provides a method for sensing and monitoring multiple parameters of a power transmission line, which adopts the following technical scheme:
a multi-parameter sensing monitoring method for a power transmission line comprises the following steps:
acquiring multi-parameter sensing monitoring data of a downlink tower of a power transmission line;
combining the acquired multi-parameter sensing monitoring data of the downlink tower with the multi-parameter sensing monitoring data of the current tower of the power transmission line to obtain combined multi-parameter sensing monitoring data;
and the obtained combined multi-parameter sensing monitoring data is used as the multi-parameter sensing monitoring data of the uplink tower and transmitted in the uplink direction, so that the multi-parameter sensing monitoring of the power transmission line is completed.
As a further technical limitation, the acquired multi-parameter sensing monitoring data of the downlink tower of the power transmission line is an optical signal, and the acquired optical signal is demodulated into a downlink TTL level signal containing the multi-parameter sensing data.
And further simultaneously analyzing downlink TTL level signals in the multi-parameter sensing monitoring data corresponding to the current tower and the multi-parameter sensing monitoring data in the current tower of the power transmission line based on the reference voltage in the microprocessor to obtain combined multi-parameter sensing monitoring data and generate local TTL level signals.
And further, the generated local TTL level signal is converted into an optical signal and then transmitted in the uplink direction, so that the multi-parameter sensing monitoring of the power transmission line is completed.
Furthermore, in the process of converting the generated local TTL level signal into an optical signal, the local TTL level signal is modulated on a carrier wave, and temperature compensation and automatic power control of the local TTL level signal are carried out based on the carrier wave, so that conversion from the local TTL level signal to the optical signal is realized.
According to some embodiments, a second aspect of the present disclosure provides a transmission line multi-parameter sensing monitoring device, which adopts the following technical scheme:
a multi-parameter sensing and monitoring device for a power transmission line comprises:
the sensor module is configured to acquire multi-parameter sensing monitoring data of the descending tower and the current tower of the power transmission line;
the optical communication module is configured to receive the multi-parameter sensing monitoring data of the downlink tower, which is acquired by the sensor module, and perform photoelectric conversion on the received monitoring data to obtain a downlink TTL level signal; meanwhile, a local TTL level signal is received, and the received local TTL level signal is subjected to electro-optic conversion and then is sent to an uplink tower;
and the processing module is configured to receive and process the downlink TTL level signal in the optical communication module and the multi-parameter sensing monitoring data of the current tower in the sensor module, and generate a local TTL level signal.
As a further technical limitation, the multi-parameter sensing and monitoring device for the power transmission line further comprises a power module, wherein the power module adopts a photocell and supplies power to the sensor module, the processing module and the optical communication module through a voltage converter.
Furthermore, the photocell adopts an indium gallium arsenic photoelectric detector and a double electric layer capacitor; wherein the electric double layer capacitor has an average power of 100mW, an output voltage of 5V, and a capacitance of 0.08F or more; the voltage converter adopts a plurality of voltage converters, and the plurality of voltage converters simultaneously comprise a boost converter and a buck converter.
As a further technical limitation, the sensor module comprises a temperature and humidity sensor, an air pressure sensor and a wind speed and direction sensor; the temperature and humidity sensor has the detection precision of +/-2% RH and +/-0.2 ℃, the detection range of 0% to 100% RH and-40 to 125 ℃, and the working voltage range of 1.62 to 3.6V; the air pressure sensor adopts a piezoresistive sensor; the wind speed sensor adopts a wind cup type wind speed sensor.
As a further technical limitation, the processing module employs a mixed signal microprocessor, and the mixed signal microprocessor at least includes a register, a comparator, a reference unit and a clock source.
Compared with the prior art, the beneficial effect of this disclosure is:
the method and the device can be used for continuously transmitting the data to the uplink direction after receiving the multi-parameter sensing monitoring data on the downlink tower and combining the data with the data on the local tower. The method enables the data on each tower in the power transmission line to be continuously transmitted to the transformer substation, and the data on the farther tower is analyzed and combined through the sensing monitoring device on the ascending tower, so that higher accuracy and consistency are realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
Fig. 1 is a flowchart of a transmission line multi-parameter sensing monitoring method in a first embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a multi-parameter sensing and monitoring device for a power transmission line in a second embodiment of the disclosure;
fig. 3(a) is a schematic circuit connection diagram of a temperature and humidity sensor in a second embodiment of the disclosure;
fig. 3(b) is a schematic circuit diagram of an air pressure sensor according to a second embodiment of the disclosure;
fig. 3(c) is a schematic circuit connection diagram of a wind direction sensor in the second embodiment of the disclosure;
FIG. 4 is a schematic diagram of a circuit connection of a processing module according to a second embodiment of the disclosure;
fig. 5 is a schematic circuit connection diagram of an optical communication interface in an optical communication module according to a second embodiment of the disclosure.
Detailed Description
The present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict.
Example one
The first embodiment of the disclosure introduces a multi-parameter sensing monitoring method for a power transmission line.
The multi-parameter sensing monitoring method for the power transmission line shown in figure 1 comprises the following steps:
step S01: receiving multi-parameter sensing monitoring data sent by a sensing monitoring device corresponding to a down tower in a power transmission line;
step S02: combining the data in the step S01 with multi-parameter sensing monitoring data sent by a sensing monitoring device corresponding to the current tower in the power transmission line;
step S03: and sending the combined data to a sensing monitoring device corresponding to the uplink tower.
As one or more embodiments, in step S01, first, the sensing and monitoring device corresponding to the down tower can modulate the meteorological information near the down tower collected by the sensing and monitoring device through the optical communication module, so as to implement transmission to the local tower through the single-mode fiber between the down tower and the local tower.
The method provided by the embodiment can be used for monitoring related parameters on one power transmission line in a certain area of the power system. Specifically, in this embodiment, one area may be all areas that can be covered by one substation. The power transmission equipment of the transformer substation realizes power supply for all load users in the jurisdiction area, and in order to realize the power supply, power transmission is carried out through a plurality of power transmission lines. In each transmission line, according to the distance between the transmission lines, the electric power towers with variable quantity can be arranged, so that overhead arrangement of the transmission lines is realized. Generally, the distance between two towers of the high-voltage transmission line is between 40 and 70 meters. In addition, a high-voltage power tower is usually arranged near various substations.
In this embodiment, one transmission line may be a line from one substation node to the end of the load user, or may be a line from one substation node to another substation node. In this embodiment, the transmission line is defined as long as it can be ensured that a plurality of linear towers are sequentially connected in the current transmission line. In particular, in this embodiment, the tower closer to the substation is referred to as an ascending tower, and the tower farther away is referred to as a descending tower. The sensing monitoring device on each tower performs data transceiving and processing, and the present sensing monitoring device on the tower is used for description in this embodiment.
Wired data transmission is generally realized between related communication equipment of a substation machine room and communication equipment on each transmission line tower in a manner of an Optical fiber cable (OPGW). The transformer substation sends the instruction data to the transmission line tower, relevant equipment on the tower collects corresponding data information and feeds the data information back to the transformer substation, and the transformer substation realizes data aggregation and processing by arranging a large-scale machine room. In the method of this embodiment, in order to achieve the maximum utilization efficiency of the existing power cable resources, the method in this embodiment may be implemented by only occupying one single-mode fiber in the power cable.
The multi-parameter sensing monitoring data in the embodiment mainly comprise meteorological information such as wind speed, wind direction, temperature, humidity and air pressure. After the information is integrated into vector data in a reasonable mode, the vector data is converted from an electric signal to an optical signal and is transmitted to the current tower from the descending tower through a single-mode optical fiber.
Based on step S01, after receiving the optical signal sent by the sensing and monitoring device in the down tower, the optical signal is demodulated into a down TTL level signal containing the multi-parameter sensing and monitoring data and output.
It can be understood that, in this embodiment, the sensing and monitoring device on the current tower may be configured to receive an optical signal from a downlink tower transmitted by a single-mode fiber, where after the optical signal sent by the sensing and monitoring device in the downlink tower is received, photoelectric conversion may be implemented in a demodulation manner. After photoelectric conversion, the sensing and monitoring device on the current tower can receive a corresponding Transistor-Transistor Logic (TTL) electric signal.
The TTL electrical signal can be used to control the output level of the corresponding circuit in the sensing and monitoring device, such as the transistor circuit in the microprocessor, and the output of the signal is realized through frequent level conversion. After the binary signal is decoded in advance, the multi-parameter sensing monitoring data can be analyzed.
As one or more embodiments, in step S02, the local multi-parameter sensing monitoring data may be directly monitored and obtained by the sensing monitoring device on the local tower. Since the local sensing and monitoring device has already received and analyzed the multi-parameter sensing and monitoring data on the down tower in step S01, the local data and the data on the down tower can be merged.
The merging process in step S02 includes:
step S201, collecting downlink TTL level signals in step S01 based on a microprocessor in a sensing monitoring device corresponding to the current tower;
s202, collecting local multi-parameter sensing monitoring data based on one or more meteorological sensors in a sensing monitoring device corresponding to the current tower, and inputting the data into a microprocessor;
and S203, simultaneously analyzing the downlink TTL level signal and the local multi-parameter sensing monitoring data based on the reference voltage of the microprocessor, and generating a local TTL level signal.
In this embodiment, the merging process may be to transmit the downlink TTL level signal to the microprocessor through the optical communication module, and to collect the local monitoring data to the microprocessor. The type selection of the microprocessor in this embodiment is important, and the microprocessor can synchronize and register data contents of multiple sources, and synchronously forward the data contents in a certain time. In addition, the microprocessor can be compatible with various different meteorological sensors and a plurality of meteorological sensors, can analyze data from different sources respectively, and can forward the data more accurately and consistently by taking the same reference voltage as a reference, wherein the forwarded signals are still level signals applicable to TTL.
In one or more embodiments, in step S03, the local TTL level signal is converted into an optical signal and sent to the sensing and monitoring device corresponding to the uplink tower.
When the microprocessor combines two different data of downlink and local, it can generate TTL level signal, which is transmitted after the signal is electro-optical converted by the optical communication module in the device. After passing through the single-mode optical fiber, the optical signal is transmitted to the upstream tower. By the mode, each current tower can acquire the downlink signals and transmit the downlink signals to the uplink tower. In this embodiment, a similar manner is adopted, so that towers at a longer distance can transmit accurate data with low loss to a transformer substation.
It can be understood that the method in the embodiment is suitable for complex scenes inconveniently involved by people such as jungles, canyons and mountains, is not influenced by signal coverage of a base station of an operator, can perform long-distance optical fiber energy supply and communication for more than 10km, can effectively solve the problems of difficult energy supply of monitoring nodes of the overhead transmission line and unreliable and unstable transmission of sensing information, reduces the construction and installation difficulty and operation and maintenance difficulty of an electric power system, and saves the monitoring cost of the system. The method also provides a large amount of accurate basic data for developing ice coating and strong wind observation in a microclimate area, acquiring long-term measured data, planning line design and establishing line operation and maintenance.
Example two
The second embodiment of the disclosure introduces a multi-parameter sensing and monitoring device for a power transmission line.
The multi-parameter sensing and monitoring device for the power transmission line shown in fig. 2 comprises a photocell, a voltage converter, one or more meteorological sensors, a microprocessor and an optical communication unit, wherein the photocell supplies power for the one or more meteorological sensors, the microprocessor and the optical communication unit through the voltage converter; the one or more meteorological sensors are used for acquiring local multi-parameter sensing monitoring data and then sending the data to the microprocessor; the microprocessor is used for receiving downlink TTL level signals from the optical communication unit and local multi-parameter sensing monitoring data from one or more meteorological sensors, processing the downlink TTL level signals and the local multi-parameter sensing monitoring data and generating local TTL level signals; and the optical communication unit receives the optical signals from the downlink tower, performs photoelectric conversion on the optical signals, sends the optical signals to the microprocessor, receives local TTL level signals from the microprocessor, performs photoelectric conversion on the local TTL level signals, and sends the optical signals to the uplink tower.
It can be understood that the optical cell in this embodiment can realize acquisition of the downlink optical signal, and generate a stable and adaptive voltage through the voltage converter to supply power to other units in the device. On the other hand, the data collected by one or more meteorological sensors are processed by the microprocessor and the optical communication unit respectively and then sent out in the form of optical signals. The optical communication unit can collect signals of the downlink tower at the same time, and the signals are transmitted to the microprocessor after photoelectric conversion, so that the microprocessor can process local and downlink signals in a unified manner.
Preferably, the photocell adopts an indium gallium arsenic photoelectric detector and an electric double layer capacitor; the electric double layer capacitor has an average power of 100mW, an output voltage of 5V, and a capacitance of 0.08F or more.
It is understood that, in the present embodiment, in order to receive or detect the light energy provided by the optical fiber, a photodetector made of an indium gallium arsenide material may be used. In addition, since the photodetector can only provide instantaneous output current, in order to store part of the electrical energy, a super capacitor is connected in parallel with the photodetector in the embodiment.
Generally, the super capacitor can be an electric double layer capacitor, and the capacitance of the super capacitor is larger than that of a common capacitor, and the self loss and the leakage current are also larger. However, the charge and discharge circuit of the capacitor is simple, has high response speed, instantaneous high-power characteristic and high power density. In this embodiment, a super capacitor with related parameters satisfying an average power of 100mW, an output voltage of 5V, and a capacitance of 0.08F or more may be selected.
Preferably, the voltage converter is a plurality of voltage converters, and the plurality of voltage converters includes both a boost converter and a buck converter.
Specifically, the device in this embodiment needs to simultaneously power a plurality of weather sensors, microprocessors, and optical communication modules in order to achieve self-power. However, in general, for example, the working voltages of the chips such as the temperature and humidity sensor and the microprocessor are both small, while the working voltages of the chips such as the optical communication module and the wind speed sensor need to be high, so that the functions such as optical/electrical conversion and wind speed collection can be sufficiently realized.
However, the supply voltage of the photovoltaic cell is usually only fixed, and the voltage of the photovoltaic cell is not usually designed to be too high in order to improve the supply efficiency.
In order to solve the problem, a plurality of different voltage converters are respectively incorporated at two ends of the photocell in the embodiment; the voltage converter for supplying power to the temperature and humidity sensor, the microprocessor, and the like may be a step-down voltage converter, and the voltage converter for supplying power to the optical communication module and the wind speed sensor may be a step-up voltage converter.
In this embodiment, the boost sensor is implemented by using a BQ25505 dc-dc converter chip, which has low power consumption and high sensitivity, and can efficiently acquire and manage micro-watt to milliwatt electric energy generated by various dc sources such as photovoltaic or hot spot generators. The static current of the chip is micro 325nA, and the cold starting voltage is 330 mV. The photovoltaic cell in this embodiment provides a stable output of around 5V, which is sufficient to achieve a rapid cold start.
In other embodiments, the boost sensor may also be implemented using an SX1308 chip. The chip is used as a patch type boost converter, the range of input voltage is large, the range is 2-24V, the output voltage can be up to 28V, and the requirements of circuits such as a wind speed sensor and the like can be fully met. In addition, the maximum output voltage of the chip is 2A, the oscillation frequency is 1.2MHz, and the chip is provided with an overcurrent and overheat protection circuit, so that safe power supply can be fully realized.
The buck voltage converter in this embodiment may be implemented by a low dropout regulator. For example, in the present embodiment, a TPS70933 chip is used. The chip is used as a common low dropout linear regulator and can be used for realizing power supply of an ultra-low static current device for power consumption sensitive application. In the voltage stabilizer, a precision band gap unit and an error amplifier unit are included, and the precision of the precision band gap unit and the error amplifier unit in a temperature range is within 2%. The quiescent current of the voltage regulator is 1 muA. The chip adopted in the embodiment also has the functions of thermal shutoff, current limitation and reverse current protection, and the safety degree of the device is improved. In addition, the chip can work in an off mode, and the off current in the off mode is below 150 nA.
The one or more meteorological sensors comprise a temperature and humidity sensor, an air pressure sensor and a wind speed and direction sensor; wherein, the detection precision of the temperature and humidity sensor is +/-2% RH and +/-0.2 ℃, the detection range is 0% to 100% RH and minus 40 to 125 ℃, and the working voltage is 1.62 to 3.6V; the air pressure sensor is a piezoresistive sensor; the wind speed sensor is a wind cup type wind speed sensor.
As shown in fig. 3(a), 3(b) and 3(c), the line connection schematic diagram of the sensor module in the transmission line multi-parameter sensing monitoring device is used for acquiring various meteorological parameters, for example, a plurality of sensors of different types are selected, for example, a temperature and humidity sensor can acquire ambient temperature and ambient humidity, an atmospheric pressure sensor can acquire atmospheric pressure, and a cup type wind speed sensor can be used for acquiring wind speed and wind direction.
In this embodiment, the temperature and humidity sensor is manufactured by using an SHTC3 chip, and the chip can meet higher monitoring accuracy and a larger monitoring range. Meanwhile, the power supply voltage range of the chip is wide, and when the buck voltage converter outputs about 3.3V direct-current voltage, stable power supply to the chip can be achieved. The chip achieves better balance in size and high robustness, the cost performance is higher, and the chip realizes communication in a half-duplex mode.
In the embodiment, the air pressure sensor is manufactured by adopting MS5611-01BA03-50 chips, and has higher resolution and ultralow power consumption. The sensor is a high-resolution digital pressure sensor, is an integrated circuit consisting of a piezoresistive sensor and a sensor interface, and can convert acquired uncompensated analog air pressure data into a 24-bit digital value through an analog-digital signal conversion function and output the digital value. The chip can simultaneously support full-duplex and half-duplex communication modes, and the communication mode is selected through a pull-up protocol selection pin.
In other embodiments, the wind speed sensor is a wind cup type wind speed sensor, a fixed reed pipe and a magnet rotating along with a wind cup are arranged in the wind speed sensor, the measuring instrument can calculate the wind speed according to the suction times of the reed pipe per minute, a 360-degree slide wire resistor is arranged in the wind direction sensor, and the rotating arm is fixed on a wind pendulum rotating along with the wind direction. Different wind directions correspond to different resistance values, and the wind direction can be known by measuring the resistance. The power supply voltage of the sensor can be relatively low, and the BQ25505 chip can be used for supplying power to the sensor.
In addition, the power supply voltage of the conventional common wind speed and direction sensor mostly adopts a +12V power supply serial port type, so that the power consumption of the conventional wind speed and direction sensor far exceeds that of a +5V power supply wind speed and direction sensor, and the requirement of the conventional wind speed and direction sensor is not met. When such a wind speed and direction sensor is used, it can be implemented using SX1308 as described in the preamble.
Fig. 4 is a schematic circuit connection diagram of a processing module in the multi-parameter sensing and monitoring device for power transmission line according to the present embodiment. The processing module shown in fig. 4 is a mixed signal microprocessor, which at least includes a register, a comparator, a reference unit and a clock source.
It can be understood that the microprocessor in this embodiment needs to receive TTL level signals from the downlink tower and receive different parameters from multiple sensors at the same time. In order to synchronize data from different sources, the microprocessor of this embodiment should at least include a clock source and a register.
In addition, in this embodiment, the signals from the down tower are collected by another sensor. According to the information common transmission method, the sensors at different positions work based on the power supply of the photocells on different towers, and when the power supply voltages of the photocells are not completely stable and identical, the acquired data can be different. The microprocessor in this embodiment compares data from different sources using the reference voltage generated by the internal reference voltage channel and the comparator, thereby substantially normalizing the data from multiple sources and making accurate correlation between data content from multiple sources.
For example, when the photovoltaic cell on the down-going tower is short of power supply, the voltage provided for the plurality of sensors is relatively low, the reference voltage provided for the microprocessor of the photovoltaic cell is about 0.8V, and the data content collected by the sensors is compared with the reference voltage to realize parameter value determination, encoding, modulation and optical signal transmission. And after the data is demodulated and decoded and is output to the microprocessor on the current tower, another reference voltage is needed to realize coding again, and the reference voltage is simultaneously suitable for collecting and coding local related data. By the mode, after data transmission is realized between the two towers, the downlink data and the local data are coded together, output is realized in a uniform format and the size of a TTL level, and the accuracy of the downlink data is higher than that of data obtained by decoding after multiple relays.
In this embodiment, an MSP430G2553 single chip microcomputer is used as a microprocessor, and the operating voltage of the microprocessor is about 3.3V.
Fig. 5 is a schematic circuit connection diagram of an optical communication interface in an optical communication unit of the transmission line multi-parameter sensing and monitoring device according to the present embodiment. As shown in fig. 5, in the present embodiment, the optical communication unit includes a light emitting module and a light receiving module. The optical receiving module receives optical signals on the downlink tower, converts the optical signals into electric signals, then performs signal amplification processing on the electric signals through the preamplifier, finally outputs TTL level signals through the low-pass filter and the limiting amplifier, and sends the signals to the microprocessor through the TXD port. The light emitting module comprises a semiconductor laser, a temperature compensation circuit and an automatic power control circuit, is connected with the microprocessor through an RXD port, and receives data from the microprocessor. Before the electric signal is modulated on the optical carrier, the data can be modified through temperature compensation, and after modulation, the optical signal output with higher signal-to-noise ratio can be realized through automatic power control.
It should be noted that the optical transmitting module and the optical receiving module can be implemented by using a photoelectric conversion interface device conforming to RS232 and RS 485. The transmission rate is low and is about 2Mbit/s at most. The laser in the optical transmitting module can adopt a 1310nm or 1550nm Fabry-Perot laser to realize long-distance transmission.
The multi-parameter sensing monitoring device for the power transmission line in the embodiment can continuously transmit data in the uplink direction after receiving multi-parameter sensing monitoring data on a downlink tower and combining the data with data on a local tower; data on each tower in the power transmission line can be continuously transmitted to the transformer substation, and data on far towers are analyzed and combined through the sensing monitoring device on the ascending tower, so that high accuracy and consistency are achieved.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (10)
1. A multi-parameter sensing monitoring method for a power transmission line is characterized by comprising the following steps:
acquiring multi-parameter sensing monitoring data of a descending tower of a power transmission line;
combining the acquired multi-parameter sensing monitoring data of the downlink tower with the multi-parameter sensing monitoring data of the current tower of the power transmission line to obtain combined multi-parameter sensing monitoring data;
and the obtained combined multi-parameter sensing monitoring data is used as the multi-parameter sensing monitoring data of the uplink tower and transmitted in the uplink direction, so that the multi-parameter sensing monitoring of the power transmission line is completed.
2. The method for monitoring multiparameter sensing of the electric transmission line as defined in claim 1, wherein the acquired multiparameter sensing monitoring data of the downlink tower of the electric transmission line are optical signals, and the obtained optical signals are demodulated into downlink TTL level signals containing the multiparameter sensing data.
3. The method for monitoring the multi-parameter sensing of the power transmission line as claimed in claim 2, characterized in that the downlink TTL level signal in the multi-parameter sensing monitoring data corresponding to the current tower and the multi-parameter sensing monitoring data in the current tower of the power transmission line are simultaneously analyzed based on the reference voltage in the microprocessor to obtain the merged multi-parameter sensing monitoring data and generate the local TTL level signal.
4. The method for monitoring the multi-parameter sensing of the power transmission line as claimed in claim 3, wherein the generated local TTL level signal is converted into an optical signal and then transmitted in the uplink direction, thereby completing the multi-parameter sensing monitoring of the power transmission line.
5. The method for monitoring multi-parameter sensing of power transmission line according to claim 4, wherein in the process of converting the generated local TTL level signal into the optical signal, the local TTL level signal is modulated on a carrier, and temperature compensation and automatic power control of the local TTL level signal are performed based on the carrier, so as to realize conversion from the local TTL level signal to the optical signal.
6. The utility model provides a transmission line many parameter sensing monitoring devices which characterized in that includes:
the sensor module is configured to acquire multi-parameter sensing monitoring data of a descending tower of the power transmission line and a current tower;
the optical communication module is configured to receive the multi-parameter sensing monitoring data of the downlink tower, which is acquired by the sensor module, and perform photoelectric conversion on the received monitoring data to obtain a downlink TTL level signal; meanwhile, a local TTL level signal is received, and the received local TTL level signal is subjected to electro-optic conversion and then is sent to an uplink tower;
and the processing module is configured to receive and process the downlink TTL level signal in the optical communication module and the multi-parameter sensing monitoring data of the current tower in the sensor module, and generate a local TTL level signal.
7. The transmission line multi-parameter sensing monitoring device according to claim 6, further comprising a power module, wherein the power module employs a photocell and supplies power to the sensor module, the processing module and the optical communication module through a voltage converter.
8. The transmission line multi-parameter sensing and monitoring device as claimed in claim 7, wherein said photocell employs an indium gallium arsenide photodetector and a double layer capacitor; wherein the electric double layer capacitor has an average power of 100mW, an output voltage of 5V, and a capacitance of 0.08F or more; the voltage converter adopts a plurality of voltage converters which simultaneously comprise a boost converter and a buck converter.
9. The transmission line multi-parameter sensing monitoring device of claim 6, wherein the sensor module comprises a temperature and humidity sensor, an air pressure sensor and a wind speed and direction sensor; the temperature and humidity sensor has the detection precision of +/-2% RH and +/-0.2 ℃, the detection range of 0% to 100% RH and-40 to 125 ℃, and the working voltage range of 1.62 to 3.6V; the air pressure sensor adopts a piezoresistive sensor; the wind speed sensor adopts a wind cup type wind speed sensor.
10. The transmission line multi-parameter sensing monitoring device as claimed in claim 6, characterized in that said processing module employs a mixed signal microprocessor, said mixed signal microprocessor at least comprising a register, a comparator, a reference unit and a clock source.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000292552A (en) * | 1999-04-02 | 2000-10-20 | Nippon Denro Kk | Meteorological observation method utilizing steel tower for transmission |
| CN103178902A (en) * | 2013-03-13 | 2013-06-26 | 千江（上海）信息科技有限公司 | Electric transmission line monitoring communication system based on super-distance wireless optical network |
| CN203203611U (en) * | 2013-04-18 | 2013-09-18 | 国家电网公司 | Quasi-distributed high voltage transmission line optical fiber monitoring network |
| CN208333536U (en) * | 2018-01-29 | 2019-01-04 | 南京泰和盈科电力科技有限公司 | A kind of ultra-high-tension power transmission line waves monitoring device |
| CN111917505A (en) * | 2019-05-10 | 2020-11-10 | 中国电力工程顾问集团华东电力设计院有限公司 | Power transmission line communication system and networking method thereof |
| WO2022016732A1 (en) * | 2020-07-23 | 2022-01-27 | 中国电力科学研究院有限公司 | Transmission line breeze vibration sensing device and method, and transmission line breeze vibration early warning device and method |
| CN114184232A (en) * | 2021-12-10 | 2022-03-15 | 重庆大学 | Multi-parameter integrated monitoring system for power transmission line |
| CN114235017A (en) * | 2021-11-26 | 2022-03-25 | 中国电力科学研究院有限公司 | Photoelectric fusion long-distance monitoring device and method for power transmission line |
-
2022
- 2022-06-09 CN CN202210646845.2A patent/CN115032717B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000292552A (en) * | 1999-04-02 | 2000-10-20 | Nippon Denro Kk | Meteorological observation method utilizing steel tower for transmission |
| CN103178902A (en) * | 2013-03-13 | 2013-06-26 | 千江（上海）信息科技有限公司 | Electric transmission line monitoring communication system based on super-distance wireless optical network |
| CN203203611U (en) * | 2013-04-18 | 2013-09-18 | 国家电网公司 | Quasi-distributed high voltage transmission line optical fiber monitoring network |
| CN208333536U (en) * | 2018-01-29 | 2019-01-04 | 南京泰和盈科电力科技有限公司 | A kind of ultra-high-tension power transmission line waves monitoring device |
| CN111917505A (en) * | 2019-05-10 | 2020-11-10 | 中国电力工程顾问集团华东电力设计院有限公司 | Power transmission line communication system and networking method thereof |
| WO2022016732A1 (en) * | 2020-07-23 | 2022-01-27 | 中国电力科学研究院有限公司 | Transmission line breeze vibration sensing device and method, and transmission line breeze vibration early warning device and method |
| CN114235017A (en) * | 2021-11-26 | 2022-03-25 | 中国电力科学研究院有限公司 | Photoelectric fusion long-distance monitoring device and method for power transmission line |
| CN114184232A (en) * | 2021-12-10 | 2022-03-15 | 重庆大学 | Multi-parameter integrated monitoring system for power transmission line |
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