RS834U - Automatic switchgear drive for power lines - Google Patents

Abstract

The device for automatic operation of the switchgear on the transmission lines consists of: cabinet 1 in which the carrier 2 mechanism is mounted, the carrier 2 mechanism on which the switch 5 is locked, the electromagnet 11, the electric motor 6 and the drive shaft 3, the drive shafts 3 which are mounted on the bank 4 control and lever 14 actuator, cam 4 command used to regulate the process of operation, switch 5 interlock for absolute lock, electric motor 6 which starts and performs the device, microswitches 7, 8, 9 and 10 that regulate the operation of the device, electromagnets 11 position-locking levers 12 for manual unblocking of the solenoid 11, a lever 13 that connects the actuator lever 14, the solenoid carrier 15, the connecting plate 16 and the gear 17 for blocking the solenoid actuator, being the electromagnet (11 ) connected to the electronic unit and in contact with the microswitch (10), which is the shaft (3) connected to the dam (4) and the lever (14), which with in the microswitches (7), (8) and (9) in contact with the bank (4), and the microswitch (10) connected to the electromagnet (11), which is the shaft (18) in contact with the gear (17), which is the gear (17) is connected to the shaft (3) and the lever (14) is connected to the lever (13). The application contains 1 more independent patent claim.

Description

TECHNICAL FIELD

The invention belongs to the field of energy in a broader sense, more closely to switches and disconnecting devices for medium-high voltage transmission lines, and refers to devices for automatic drive of disconnectors on transmission lines.

According to the International Patent Classification (IPC), the designation is H 01 H 3/26; H 01 H 3/28; H 01 H 9/00, H 02 B 11/00.

TECHNICAL PROBLEM

How to constructively solve the automatic drive of the disconnector with the help of the Device for automatic drive of the disconnector on transmission lines, and that it be: reliable and safe operation, economical, safe and secure handling, simple production and assembly, simple maintenance and servicing, universal application, etc., and with the application of failure indicators and electric drive.

STATE OF THE ART

Now, setting the switching state on medium-high voltage transmission lines (lOkV, 20kV, 35kV) is done using line disconnectors placed along the transmission line, which has several disadvantages: the presence of a human-operator is required, the hiring of a means of transport, the time required to locate the point of failure, the time to arrive at the point of failure, the time to restore the disconnector to a new state, etc.

When it is taken into account that the exact location of the fault is often not known, so it is necessary to change the switching state several dozen times, and that faults also occur in bad weather conditions (snow, storms, etc.) and that access to the location of the fault is very difficult or impossible, then the time to set a new state multiplies. All this requires large financial resources, which makes the current situation very uneconomical and impractical. However, the current situation also produces other accompanying costs: due to frequent shutdowns due to malfunctions, the equipment wears out, which has the effect of shortening the life of the equipment and frequent power interruptions to transmission lines for servicing and repairs, financial and economic losses due to longer power interruptions and non-delivery of electricity, that due to the deregulation of the electricity market, economic losses occur in the form of payment of contracted penalties, etc. As a conclusion, the current state of maintenance and operation of power transmission lines is very uneconomical and unsustainable.

DISCLOSURE OF THE ESSENCE OF THE INVENTION

The device for the automatic drive of the disconnector on power lines consists of: a cabinet in which the mechanism support is mounted, the mechanism support on which the blocking switch, electromagnet, electric motor and drive shaft are mounted, with a control cam and a drive lever, a control cam that serves to regulate the work process, a blocking switch that serves for absolute blocking, an electric motor that operates the device, a microswitch that regulates the operation of the device, an electromagnet that serves to block the position, levers for the manual blocking of the electromagnet, the coupling lever with which the drive handle is connected, the drive handle that includes the disconnector, the electromagnet carrier, the connecting plate and the gear that serves to block the electric drive.

The device works by making the necessary preparations beforehand, then it is placed and attached to the transmission line pole and connected to the coupling lever. Communication is done wirelessly or by some other means. When the fault indicator reports a fault on the transmission line, the fault signal sends voltage to the electromagnet, which unblocks the gear, and at the same time activates the microswitch and supplies voltage to the electric motor. The electric motor drives a shaft with a gear and a cam, which drives the drive lever and moves the coupling lever, thereby establishing a new position of the disconnector. Then the electric motor drive is out of the end positions, so the microswitch for powering the electric motor powers the electric motor. When the gear locks the device again, and the control cam activates the corresponding microswitch, the device is ready for operation again. The device can also work in semi-automatic mode, when it executes commands from the remote monitoring center.

BRIEF DESCRIPTION OF THE PICTURES

You're on. 1 shows the appearance of the device in the closed state in a side view and an oblique projection,

You're on. 2 shows the appearance of the device with an open front door,

You're on. 3 shows the appearance of the device with open and other doors,

You're on. 4 shows the appearance of the device from the side and the appearance of the connection of the coupling lever and the operating lever,

You're on. 5 shows the appearance of the device from the back and the appearance of the opening for the connection with the power line pole,

You're on. 6 shows the mechanical group in side view

You're on. 7 shows the mechanical group in a top view

You're on. 8 shows the mechanical group in section A-A from figure 7,

You're on. 9 shows the position of the switch in "0" when the device is completely blocked,

You're on. 10 shows the position of the switch in "1" when the "on" - "off" change can be made in the local operating mode and

You're on. 11 shows the position of the switch in "2" when it can be changed to "on-off" remotely.

DETAILED DESCRIPTION OF THE INVENTION

The device for automatic drive of disconnectors on transmission lines (hereinafter referred to as the Device) shown in Figures 1 to 11 is a new constructive solution in the field of devices for automatic drive of disconnectors on transmission lines, which provides: automatic drive of disconnectors, reliable and safe operation, economy, safe handling and use, simple manufacturing and assembly, universal application, simple maintenance and servicing, etc.

The device is intended for the electrical industry for use on disconnectors on medium-high voltage transmission lines.

The device consists of: cabinet 1, support 2 mechanism, shaft 3 drive cam 4 control, switch 5 blocking, electric motor 6, microswitches 7, 8, 9 and 10, electromagnet 11, lever 12 unlocking, lever 13 coupling, lever 14 drive, support 15 electromagnet, plate 16 connecting and gear 17.

The construction of the device consists in the fact that: the switch 5 is fixed on the support 2, then the support 15 is mounted on the support 2, the electric motor 6 is attached to the support 2, then the electromagnet 11 is mounted on the support 2, the plate 16 is attached to the electromagnet 11, then the shaft 3 and the cam 4 are mounted, then the gear 17 is attached to the shaft 3, then the handle 12 is connected to the plate 16 and the support 15 and connect microswitches 7, 8, 9 and 10. The device assembled in this way is placed and fastened in the cabinet 1. The power source 22 and the battery 23 are also placed in the cabinet, which enables the device to operate in the de-energized state of the transmission line.

The device works by making the required preparations beforehand: install the remote control and monitoring electronic unit (RTU) and connect it to the remote control center for executing the given commands, install the fault indicator on the transmission line, set the lever 14 to position "2" (si.

11) for remote control, dismantles the handle

manual drive of the disconnector, so the device is placed and attached to the transmission line pole using hole 21.

Communication is done wirelessly or by some other means. When the fault indicator "reports" a fault on the transmission line, the fault signal is introduced into the electronic unit (or in some other way) and passes the voltage to the electromagnet 11, which unblocks the gear 17 by pulling the pin 18 out of the opening 19, and at the same time activates the microswitch 10, which supplies voltage to the electric motor 6. The electric motor 6 drives the gear 17 and the pin 3, and thus the cam 4, which drives handle 14 and moves lever 13, thus establishing a new position of the disconnector. Now the electric drive is out of the end positions and the microswitches 7 and 9 are no longer active, so the microswitch 10 loses power and simultaneously activates the microswitch 8, which takes over the power supply of the electric motor 6. As now the microswitches 7 and 9 are inactive, the electromagnet 11 loses power and returns to the initial position under the action of the lever 20. The pin 18 slides on the gear 17 until the cam 4 unblocks circuit breaker 8, when the operation of the electric motor 6 stops. Now the whole system moves by inertia until the pin 18 meets the next opening 19 of the gear 17 and blocks the device. At the same time, cam 4 activates microswitch 7 or 9, so the device is ready for operation again. To restart the device, this whole process is repeated, except now the roles of microswitches 7 and 9 have been reversed, so that if microswitch 7 was active at the beginning of the previous operation, it is now microswitch 9.

The device can also function in the mode when it executes commands received from a remote control center. Then the signal from the RTU unit is introduced into the electronic unit and so on in the same way as in the previously described case. In this mode of operation, the fault indicator is optional and its signal is fed into the RTU and sent to the remote monitoring center.

The feature of this construction is reflected in the fact that: switching off and on the disconnector, i.e. setting the switching state on the transmission line is done automatically (without the presence of a human operator) and that communication and supervision are done from one monitoring center, wirelessly or in some other way. This achieves the stability of power transmission lines, reliable and safe operation in all weather conditions, and great economy in the delivery of electricity. Reliable and safe power supply of transmission lines was achieved by excluding the human factor from the work process and thereby removing long interruptions in the power supply of transmission lines. Any break in the transmission line is automatically eliminated practically immediately and power is restored to the correct part of the transmission line. The economic efficiency of this solution is reflected in the fact that by excluding the operator from the work process, the costs of locating the fault location, arriving at the fault location, and using the vehicle are eliminated. As the point of failure cannot be located quickly and accurately, it is necessary to change the switching state dozens of times until the point of failure is determined, which wastes a lot of time. Especially large financial costs are produced when the failure occurs in inaccessible terrain and in bad weather conditions (snow, storm, etc.) when interruptions in power transmission lines are long-lasting. During all this time, the supply of electricity was also interrupted. These long-term interruptions can also result in the costs of paying agreed penalties for non-delivery of electricity, etc. There is no need to hire a vehicle, so all associated costs (vehicle, driver, fuel, maintenance, etc.) are eliminated. Since there is practically no switch-on under failure, and thus no corresponding wear and tear of the equipment, the service life of the equipment is much longer, which also contributes to the greater economy of this construction. Because of all this, this solution is considered very economical. Handling the device is very simple and safe, because it is done by trained people for remote control in the monitoring center. The production of devices and assembly or adaptation to already existing, built-in manual disconnectors with a lever drive, do not represent any technical-technological problem, because classic-standard materials and elements from that field are used. The universal application is manifested in the fact that it can be adapted to all existing types of disconnectors very simply and easily with a small adaptation, that the connection of the device can be performed in various ways, such as: articulated connection, fork and other coupling connections, that by simply disassembling the handle for the manual drive of the linear disconnector, it is connected to the device using a coupling lever or in some other way. All this makes the device economical and practical.

A prototype and a couple of pieces were made and put into operation, where they showed very good results.

The device was exhibited at "TESLA FEST" in 2005 under the trade name Electronic drive for MV disconnectors on transmission lines IP 100.

INDUSTRIAL OR OTHER METHOD

APPLICATIONS OF THE INVENTION

The simple construction for the production or adaptation of existing disconnectors also enables simple production and assembly, with the use of standard commercial materials and elements and the application of classic technologies for that area.

Claims (1)

1. Device for automatic drive of the disconnector on transmission lines consists of: cabinet 1 in which the mechanism carrier 2 is mounted, the mechanism carrier 2 on which the blocking switch 5 is mounted, the electromagnet 11, the electric motor 6 and the drive shaft 3, the drive shaft 3 on which the control cam 4 and the drive handle 14 are mounted, the control cam 4 that serves to regulate the work process, the blocking switch 5 that serves for absolute blocking, the electric motor 6 that drives and performs the operation of the device, microswitches 7, 8, 9 and 10 that regulate the operation of the device, electromagnet 11 that serves to block the position, lever 12 for manual unlocking of the electromagnet 11, the coupling lever 13 with which the drive handle 14 is connected, the support 15 of the electromagnet, the connecting plate 16 and the gear 17 that serves to block the electromagnetic drive, indicated by the fact that it is an electromagnet (11) connected to the electronic unit and in contact with by microswitch (10), which pin (3) is connected to cam (4) and lever (14), which microswitches (7), (8) and (9) are in contact with cam (4), and microswitch (10) is connected to electromagnet (11), which pin (18) is in contact with gear (17), which gear (17) is connected to pin (3) and which is lever (14) connected to the lever (13).