RU114565U1 - DEVICE FOR AUTOMATED CONTROL OF ICE AND WIND LOADS ON ELECTRIC TRANSMISSION AIR LINES - Google Patents

Abstract

1. A device for automated control of ice and wind loads on overhead power lines, containing a load force sensor installed between the traverse and a garland of insulators of each phase wire attached to a support, connected to an exchange controller that polls sensors, connected to a transmitting modem, which is connected to a receiving modem connected to a measuring device, while a computer is used as a measuring device, an ambient temperature sensor connected to an exchange controller, characterized in that a lightning protection cable force sensor of each circuit is introduced into the claimed device, installed above a garland of insulators on a lightning protection cable post supports, a humidity sensor combined with an ambient temperature sensor, and a wind direction and speed sensor; all sensors are connected to the interface converter of the exchange controller through a two-wire interface bus, while a microcontroller and an interface converter are introduced into each of these sensors both to control the physical quantity and to convert it into a digital code and transmit data to the exchange controller, into which the converter is inserted interface connected to a transceiver modem, which provides data conversion and information transmission to the receiving point, the transceiving modem of which is connected to a computer, which provides information processing and transmission to display terminals, while the exchange controller and the receiving point are connected to each other via the air. ! 2. The device according to claim 1, characterized in that the two-wire interface bus, which

Description

The inventive utility model relates to the electric power industry and can be used for remote monitoring of ice and wind loads on a wire of an intermediate span of an overhead power transmission line.

A device for detecting deposits on the wire of the intermediate span of an overhead power transmission line, [1], comprising a television transmission device, a relative wind direction meter, a wind speed meter, four functional converters, a threshold shaper, two threshold elements, an OR logic element and two force measuring sensors, each which are suspended movably between the support beam and the corresponding string of insulators. The lower ends of both garlands are interconnected pivotally, forming a V-shaped suspension, to which a wire is attached. And the upper ends of the sensors are attached to the support beam at a distance from each other, equal to the length of the string of insulators with the sensor, forming an equilateral triangle with a V-shaped suspension.

However, in the absence of wind, this device does not distinguish insignificant deposits on the wire from changes in the tension of the wire under the influence of ambient temperature differences, and also does not determine the nature of deposits. In addition, for the technical implementation of this device, it is necessary to make significant changes in the design of the support.

It is also known a device for measuring icy and wind loads on overhead power lines, [2] comprising a magnetoelastic force sensor suspended between a support beam and a string of insulators with a phase wire and connected through a first signal amplitude isolation unit and a first television transmission channel to a first measuring device. The first current sensor with a second signal amplitude extraction unit is connected to the first input of the division unit. A summing amplifier is connected between the second signal amplitude extraction unit and the first input of the division unit. The second current sensor is connected to the second input of the input summing amplifier and to the second input of the division unit. The output of the division unit is connected to the control inputs of two additionally introduced non-linear converters, the first of which is connected between the first signal amplitude extraction unit and the first television transmission channel, and the second is connected between the first signal amplitude extraction unit and the additionally introduced second television transmission channel with the second measuring device connected to it . Moreover, a magnetic current transformer mounted on a support beam, with an axis coinciding with the axis of the string of insulators in the absence of wind load, was used as the first current sensor. As the second current sensor, a magnetic current transformer is used, combined with a magnetoelastic force sensor, and with the axis orientation perpendicular to the axis of the insulator string in a plane passing through the axis of the insulator string perpendicular to the phase wire axis.

The disadvantages of this device are that in the absence of current in the line it does not determine the wind component of the external load on the line, and also that when the direction of the wind is not perpendicular to the line, it does not take into account the total wind component of the external load, which leads to a large number of false positives.

Closest to the proposed utility model in its technical essence, is a device for measuring ice and wind loads on overhead power lines, [3] containing a force sensor suspended between the support beam and a string of insulators with a phase wire, a measuring device and a television transmission channel, with additionally introduced roll sensors mounted on a string of insulators and on the support body, a temperature sensor and a polling controller. Moreover, the transmitting and receiving radio modems are selected as the TV channel, and the computer is selected as the measuring device, while the force, roll and temperature sensors are connected to the input of the polling controller, the output of which is connected to the input of the transmitting radio modem, and the input of the receiving modem is electrically connected to the input of the computer .

A disadvantage of the known device is the technical complexity in measuring the wind component of the load associated with the need to control the roll of a string of insulators in the plane perpendicular and parallel to the axis of sight of the line, as well as control the roll of the support body in the plane of perpendicular and parallel to the axis of sight of the line. Additionally, as a disadvantage, it is possible to note the inability to determine the nature of the load by means of air humidity control.

The purpose of the claimed utility model is to increase the reliability of controlling the influence of ice and wind loads on the wire of an overhead power line under any meteorological conditions.

The goal is achieved by a combination of well-known and distinctive features of the claimed device. Well-known signs are that the device for automated control of ice and wind loads on overhead power lines contains a load force sensor installed between the traverse and a string of insulators of each phase wire mounted on a support, connected to an exchange controller that polls the sensors. The ambient temperature sensor is also connected to the exchange controller. The exchange controller is connected to a transmitting modem, which is connected to a receiving modem connected to a measuring device. In this case, a computer is used as a measuring device.

Distinctive features are that a lightning protection cable strength sensor of each circuit is installed in the inventive device, mounted above a string of insulators on a support rod of a lightning protection cable, a humidity sensor combined with an ambient temperature sensor and a wind direction and speed sensor. The load force sensors of the phase wire and lightning protection cable, ambient temperature and humidity, wind direction and speed are connected to the converter of the exchange controller interface through a two-wire interface bus. A microcontroller and an interface converter are introduced into each of these sensors; due to this, the sensors perform the function of not only controlling the physical quantity, but also convert each physical quantity into a digital code and transmit data to the exchange controller. An interface converter connected to a transceiver modem is also introduced into the exchange controller, which provides data conversion and information transfer to the receiving point. The receiving-transmitting modem of the receiving point is connected to a computer that processes and transmits information, through the output of the latter, to the display terminals. The exchange controller and the reception point are connected through the air. A bridge rectifier for each sensor is introduced into the two-wire interface bus, which provides data exchange and simultaneous electrical power to each sensor, which allows you to include wires regardless of the polarity of the signals.

The figure shows a structural diagram of the device in statics. The device for automated control of ice and wind loads on overhead power lines contains a force sensor 1 installed between each traverse 2 and a string of insulators 3 of each phase wire of the support 4. A power sensor of the lightning protection cable 5 of each circuit is installed above the string of insulators 3 on the rack of the lightning protection cable 6 of the support 4. Force sensors 1 and 5 are connected via a two-wire interface bus 7 to an interface converter 8. A temperature sensor is connected to an interface 8 converter via the same two-wire interface bus 7 temperature and humidity 9, as well as a direction and wind speed sensor 10. The interface converter 8 is connected to the transceiver modems 11 and 12. The transceiver modem 12 is connected to the computer 13, the output of which 14 is via the TCP / IP network protocol, Transmission Control / Internet Protocol, provides information delivery to the necessary terminals for displaying information about ice and wind load. In total, the interface converter 8 and the transceiver modem 11 form an exchange controller 15, and the transceiver modem 12 and the computer 13 form a reception point 16, which are interconnected via ether.

The device operates as follows. The computer 13 of the reception point 16, in accordance with a predetermined polling interval, generates a request for monitoring parameters. The request, through the transceiver modems 12 and 11, is sent to the interface converter 8 of the exchange controller 15, which performs an address poll of the force sensors 1 and 5, the temperature and humidity sensors 9 and the wind direction and speed sensor 10. Through the two-wire interface bus 7 the digital value of the controlled physical quantity received from each sensor is converted by the interface converter 8 into a response information packet and transmitted to the computer 13 via the transceiver modems 11 and 12. I am processing information and transmitting the result of current information about ice and wind conditions through its output 14 to information display terminals.

The technical result consists in increasing the reliability of determining the influence of ice and wind loads on the wire of the power line, which is achieved by the introduction of new features in conjunction with well-known features. So, for example, the introduction of a wind direction and speed sensor allows you to take into account the wind component of the load on the wires of the overhead power line on the installation support of the device. Knowing the geographical location of the overhead power line, and receiving the direction values relative to the cardinal points and wind speed on the computer of the receiving point, one can take into account the wind component of the load. The introduction of a humidity sensor allows, when analyzing at a reception point, in conjunction with information about the temperature, to take into account the meteorological possibility of ice. Thus, it is possible to exclude the possibility of triggering ice melting systems from factors such as, for example, planting birds on the wires of an overhead power transmission line. The use of a two-wire interface bus for communication between sensors and an exchange controller and the introduction of microcontrollers and interface converters into each sensor make it possible to ensure the reliability of controlled indicators. The interface converter in the exchange controller, with a two-wire interface bus connected to it, allows for address polling and power supply of several tens of sensors connected in parallel to this interface. This provides the opportunity to implement the control of ice load on each wire with any configuration of the support.

An example implementation of the inventive device. Force sensors 1 and 5 can be implemented on the basis of a magnetoelastic force sensor and a converter implemented on the basis of a PIC16F688 microcontroller from Microchip, USA. The traverse 2 and the stand of the cable 6 are, for example, the metal parts of the universal steel double-chain intermediate support P220-2T. The garland of insulators 3 can be made of insulators PS70E, PS120B according to GOST 27661. As a two-wire bus interface 7, you can use the M-Bus standard EN1434-3. Interface converters included in the sensors can be implemented on the TSS721A chip, Texas Instruments, USA. The interface converter 8 can be implemented on the basis of the PIC18F6520 microcontroller, Microchip, USA. The temperature and humidity sensor 9 can be implemented on the basis of the DTV sensor, manufactured by ZAO NPF Agrostroy and the PIC16F688 controller, Microchip, USA. As a direction and wind speed sensor 10, a WAV 15 / 151A wind direction sensor and a WAA15 / 151A wind speed sensor, from Vaisala, Finland, with a PIC16F688 microcontroller from Microchip, USA, can be used. For the implementation of modems 11 and 12, you can use an external modem MC35i, company "Siemens", Germany. As a personal computer 13, a PC with the Windows XP operating system, an Intel Pentium 4 1.5 GHz processor, at least 128MB RAM, a mouse, a keyboard, and a monitor can be used.

Sources of information used:

1. RF patent for the invention No. 2291536, etc. 16.02.2005, class. H02G 7/16, H04B 3/54. Op. January 10, 2007

2. RF patent No. 2145758 for the invention, pr.17.08.1998, class. H02G 7/16. Op. 02/20/2000

3. RF patent No. 100682 for utility model, etc. 21.04.2010, class. H02G 7/16, H02J 13/00. Op. December 20, 2010

Claims (2)

1. The device for automated control of ice and wind loads on overhead power lines, containing a load force sensor installed between the traverse and a string of insulators of each phase wire, mounted on a support, connected to an exchange controller that polls the sensors connected to the transmitting modem, which is connected to a receiving modem connected to the measuring device, while a computer, an ambient temperature sensor connected to to an exchange controller, characterized in that a lightning protection cable strength sensor of each circuit is inserted into the inventive device, mounted above a string of insulators on a support rod of a lightning protection cable, a humidity sensor combined with an ambient temperature sensor, and a wind direction and speed sensor; all sensors are connected to the converter of the exchange controller interface via a two-wire interface bus, and a microcontroller and an interface converter are introduced into each of these sensors both to control the physical quantity and to convert it into a digital code and transfer data to the exchange controller into which the converter is inserted interface connected to a transceiver modem, which provides data conversion and information transfer to a receiving point, the transceiver modem of which is connected to a computer ing provides processing and transmission of information to the display terminals, wherein the exchange controller and a receiving station interconnected via ether. 2. The device according to claim 1, characterized in that a bridge rectifier for each sensor is introduced into the two-wire interface bus, which provides data exchange and simultaneous electrical power to each sensor, ensuring the inclusion of wires regardless of the polarity of the signals.