KR101653612B1

KR101653612B1 - Fault line separating controlling system has been applied to the distribution line equipment

Info

Publication number: KR101653612B1
Application number: KR1020150102649A
Authority: KR
Inventors: 유춘상
Original assignee: 유춘상
Priority date: 2015-07-20
Filing date: 2015-07-20
Publication date: 2016-09-02

Abstract

The present invention relates to a fault section separation control system for a distribution line. When an execution command by an automatic algorithm is transmitted to a terminal apparatus after determining a fault indicator (FI) by fault current or voltage computation in real time by detecting voltage and current in a load terminal, and transmitting the FI to an upper system, the terminal apparatus performs a role to more quickly separate and restore a fault section of the distribution line by operating a motor with autonomous communication and a fault determination algorithm, and can quickly separate and restore the fault section by receiving power by a condenser means all the time even if a blackout occurs for a long period of time.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a fault line separation control system for a distribution line,

More particularly, the present invention relates to a fault section separation control system for a distribution line, and more particularly, to a line section opening / closing apparatus operated by detecting signals of sensor means provided on a leading end side and a rear end side of a distribution line passing through an in- And to a fault section separation control system of a distribution line for temporarily shutting off the flow to a distribution line when a distribution line failure occurs.

As is well known, distribution lines that supply electricity from substations to cadastre are made up of complicated trunks and branches because they have to supply power to a large number of consumers.

Therefore, in case of ground fault (when the wire is disconnected and grounded on the power distribution line) or short circuit (when the wires on different phases are caught), fault current and voltage occur, A lot of efforts are needed to find out.

In the past, when a fault current and a voltage are generated in a distribution line, a substation operator is operated by a substation operator in order to find faulty current and voltage, It was a common method to find out the merits by exchanging them.

However, in the case of the above-described method, a long time is required as the recovery time is long and the power saving time is long, resulting in frequent inconveniences of power consumers.

Accordingly, there is a need for a method for improving the reliability of the power supply and the quality of service for the customer by shortening the power failure time by quickly grasping and recovering the position of the power supply when an accident occurs in the power distribution line.

Thus, at present, a line automatic switch is installed in a branching point or a customer entrance in a substation with a load capacity of 4000 [kVA] or less.

In the event of a ground fault, the line automatic switch closes or opens the fault section quickly and accurately in cooperation with the line open / close control device installed in the circuit breaker of the substation and the distribution line, thereby preventing the fault section from expanding and minimizing the damage.

As described above, in the case where a fault current and a voltage are detected due to an accident in a distribution line, there are a circuit breaker, a switch, and a recloser for separating and isolating the fault current and the high voltage generated.

Hereinafter, the function will be described briefly.

The circuit breaker (CB) can open or close the line when a very large fault current is detected from the distribution line. It is also possible to open and close a line through which normal current flows as required.

Unlike circuit breakers, a load break switch (LBS) is a device that can open and close a line only when current does not flow, or when normal current and voltage flow, and when a fault current and voltage occur, the line can not be opened or closed do. A control unit called a feeder remote terminal unit (FRTU) may be installed in the switch for controlling the operation thereof. That is, the FRTU is a device connected to the mechanical part of the switch to control the opening and closing of the switch. However, the FRTU does not control the mechanism by determining the opening and closing of the line through the switch, but can control the mechanism by receiving a command from the host (main controller) through the communication function.

Recloser is a special type of circuit breaker that performs reclosing of the line. If a fault current is detected from the distribution line and continues for a certain period of time, the recloser opens the line and closes the line again after a preset period of time. If the fault current is continuously detected even after the line is closed, the recloser repeats the reclosing process of the line as described above a predetermined number of times, and if the fault current continues, the line is completely opened and the reclosing operation is no longer performed .

However, when a line failure occurs in the distribution line, it is decided based on the judgment of the person in charge of the distribution management system or the operation room, or by turning off the two switches of the corresponding line in accordance with the program for automatically detecting the fault in the distribution line, .

Therefore, it is inevitable to determine the fault zone of the person in charge of the distribution management system or the distribution operation room.

Because lack of education by simulation and accident do not happen all the time, human may delay judgment error of fault section, that is, fault section separation time due to human error.

In view of such conventional problems, in recent years, a voltage and a current at a lower stage are detected to determine a high-speed fault indicator (FI) by a fault current calculation in real time and transmitted to an upper system, The terminal device is provided with an automatic switchgear of a power distribution system that performs a function of separating / returning a fault section by a self-communication and a failure determination algorithm, that is, an automatic open / close device of a fault section of a power distribution line is installed and used have.

Korean Patent Registration No. 10-0956712 (Apr. 29, 2010), entitled " automatic open / close device for a fault section in a power distribution line, " However, in the case of the registered patent, since important parts are mounted, there is a fear of penetration of the rainwater when the door is opened. Therefore, it has become necessary to provide a locking device for the door.

Korea Patent Registration No. 10-0956712 (Apr. 29, 2010) "Automatic switchgear for fault section of distribution line"

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a method and apparatus for detecting a fault and a fault indicator (FI) After transmitting to the upper system, if the execution command by the algorithm is transmitted to the terminal, the terminal operates the motor by its own communication and fault decision algorithm to more quickly isolate the fault section to the power line, The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a fault section separation control system for a distribution line that has an advantage of quickly separating / returning a fault section because power is always supplied thereto by power storage means even if a long-

The present invention provides, as means for attaining the above-mentioned object, a wireless communication apparatus for receiving a measurement signal of a sensor means for detecting a voltage and a current at a lower end of a distribution line, A communication module 110; A CPU (100) for determining in real time the strength of the signal transmitted from the communication module (110) based on a fault current and a voltage; A storage means (200) connected to the CPU (100) and charged by a power source flowing through a distribution line; Motor means 300 connected to the CPU 100 and driven by an operation signal of the CPU 100; A main body 400 having the CPU 100, the battery unit 200, and the motor unit 300 installed inside and having a door 410; Rotating shaft means (500) connected to the shaft of the motor means (300); An operating connection member (600) horizontally installed at an end of the rotary shaft means (500); A connection connecting member 700 connecting and disconnecting voltage and current by insertion and removal while the operating connecting member 600 is rotated by driving the motor means 300; And a cover member (800) for protecting the operation connecting member (600) and the connecting connecting member (700);

The connection connecting member 700 is formed such that a power line is connected to one surface of the fixing plate 710 and four grounding rods 720 are formed on the other side to form a quadrilateral shape and the grounding rod 720 and the grounding rod 720 are connected to each other. A space portion into which the operation connecting member 600 is inserted is formed; An operation lever 900 for manually operating the motor means 300 in an emergency is further provided inside the main body 400; A solar cell using solar light as a power source is further connected to the storage means 200;

The door 410 is provided with a latch 422 for controlling the opening and closing of the door 410. A latch 402 is fixed to the latch 400 and the latch 402 is rotated, The fixture 402 is shaped to have a "C" shaped fixing groove 404 and is fixed on the body 400 through a bolt; The latch 422 is a plate-like member protruding in a rectangular shape from a part of the circumferential surface of the rotating disk 420; The rotating disk 420 is hermetically sealed by the first and second housings 430 and 440; The first and second housings 430 and 440 have a square box shape with one side opened; A cylindrical protrusion 426 protrudes from one side surface of the rotating disc 420 and a fitting groove 428 with a diameter corresponding to the outer diameter of the cylindrical protrusion 426 is formed on the other side of the rotating disc 420. An axial projection 428a protrudes from the bottom surface of the fitting groove 428; A circular first gear T1 protrudes from the other side surface of the rotating disc 420 along the circumference of the fitting groove 428; The openings of the first housing 430 are arranged toward the cylindrical protrusions 426 and the openings of the first and second housings 430 and 430 are inserted into the second housing 440 The fitting portion 432 is protruded; On both sides of the short side of the fitting portion 432, a pair of locking projections 434 are formed integrally with each other; A housing groove 436 having a diameter corresponding to the protrusion groove 424 of the cylindrical protrusion 426 is formed at the center of the bottom surface of the first housing 430; A bolt hole 438 is formed at four corners of the bottom surface of the first housing 430; A coil spring 450 is interposed between the first housing 430 and the rotating disk 420. One end of the coil spring 450 is inserted into the housing groove 436 and engaged with the coil spring 450, And the other end is engaged with the projection groove 424 of the cylindrical projection 426; A slit 442 is formed at one long side of the second housing 430; The latch 422 is passed through the slit 442; At both sides of both sides of the second housing 430, a locking hole 444 is formed through which the locking protrusion 434 is inserted and fixed after the locking protrusion 434 is inserted. A through hole 446 having a diameter corresponding to the fitting groove 428 is formed at the center of the upper surface of the second housing 430; A second gear (T2) for tooth-engaging with the first gear (T1) is formed around the through hole (446) in a circular shape; The shaft protrusion 428a penetrates through the through hole 446 and the dial 460 is inserted and fixed while being exposed to the outside so that the shaft protrusion 428a can be rotated when the dial 460 is rotated;
A cylindrical fitting guide 462 protrudes from the dial 460 so that the through hole 446 and the fitting groove 428 are formed in the center of the protruding surface of the shaft protrusion 428. [ , And a square fitting hole (464) inserted into the fixing groove (428b) further protrudes from the center of the circle of the fitting guide (462) .

According to the present invention, a voltage and a current at a lower stage are detected, a high-reliability (FI) indicator is detected in real time by a fault current or a voltage calculation, and the result is transmitted to an upper system. The terminal device operates the motor by its own communication and fault determination algorithm to quickly isolate / restore the fault section of the power distribution line, and even if the power is turned off for a long time, So that there is an advantage that the failure section can be separated / returned quickly.

1 is an exemplary view showing an installation state of a fault section separation control system of a distribution line according to the present invention.
FIG. 2 is a perspective view showing the entire outline of a fault section separation control system of a distribution line to which the technique of the present invention is applied; FIG.
Fig. 3 is a front view showing the structure of a fault section separation control system of a distribution line to which the technique of the present invention is applied
FIG. 4 is a plan view showing a structure of a fault section separation control system of a distribution line to which a technology of the present invention is applied. FIG.
5 is a perspective view showing a structure of a connection connecting member;
6 is a side view showing a coupling structure of the operating connecting member and the connecting connecting member;
7 is an exemplary diagram showing another embodiment of the present invention;
8 is a perspective view showing another structure of a connection connecting member which is a main part of the present invention.
9 is a side elevational view of an exemplary embodiment of a locking body of a door which is a substantial part of the present invention.
10 is an exploded perspective view of an exemplary door locking means which is a substantial part of the present invention;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Before describing the present invention, the following specific structural or functional descriptions are merely illustrative for the purpose of describing an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention may be embodied in various forms, And should not be construed as limited to the embodiments described herein.

In addition, since the embodiments according to the concept of the present invention can make various changes and have various forms, specific embodiments are illustrated in the drawings and described in detail herein. However, it should be understood that the embodiments according to the concept of the present invention are not intended to limit the present invention to specific modes of operation, but include all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.

As shown in FIG. 1, the present invention is applied to a detection signal of sensor means (S1) and (S2) provided on the front end side and the rear end side of a power distribution line passing through a substation installed for transmission to a company or each household in a power plant, a substation, The fault section separation control system 1 operates to temporarily shut off the flow of the power to the distribution line when the distribution line fails.

2 to 4, a fault section separation control system 1 according to the present invention installed in the above-mentioned side elevator according to the present invention includes a sensor (not shown) installed at a certain portion of a distribution line, A wired or wireless communication module 110 for receiving a measurement signal of the means S1 and S2 and for transmitting the received signal value in real time and a signal value transmitted from the communication module 110 to a fault current and a fault voltage A battery unit 200 connected to the CPU 100 and charged by a power source flowing through a power distribution line, and a power supply unit 200 connected to the CPU 100 and connected to the CPU 100, The motor means 300 driven by the operation signal is installed inside the main body 400 provided with the door 410 which is opened and closed by the hinge.

In addition, the door 410 is further provided with a latch 422 as shown in FIGS. 9 and 10, and a latch 402 is provided on the side of the body 400 corresponding to the latch 422.

At this time, the fixture 402 has a shape having a substantially 'C' shaped fixing groove 404 and is firmly fixed on the body 400 through the bolts.

The latch 422 is a plate-like member that is pivotally locked or unlocked by being inserted into or separated from the fixing groove 404 while rotating.

In addition, the latch 422 is disposed on the opposite side of the door hinge (not shown) so that the door 410 can be easily and conveniently locked when the door 410 is opened and closed.

For this purpose, the latch 432 is formed to protrude in a rectangular shape from a part of the circumferential surface of the rotating disk 420.

In addition, the rotary disk 420 is sealed by the first and second housings 430 and 440, and the first and second housings 430 and 440 have a rectangular box shape with one side opened.

Particularly, a cylindrical protrusion 426 protrudes on one side of the rotating disc 420, and a fitting groove 428 having a diameter corresponding to the outer diameter of the cylindrical protrusion 426 is formed on the other side.

An axial protrusion 428a protrudes from the center of the bottom surface of the fitting groove 428 and a rectangular fixing groove 428b is formed in the protruding surface of the axial protrusion 428,

In addition, a circular first gear T1 protrudes from the other side surface of the rotating disc 420 along the circumference of the fitting groove 428. [

The openings of the first housing 430 are arranged toward the cylindrical protrusions 426 and the openings of the first housing 430 and the second housing 440 are spaced apart from the body of the first housing 430 The fitting portion 432 to be fitted is protruded.

A pair of latching protrusions 434 are integrally formed on both sides of the short side of the fitting portion 432 so that the latching protrusion 434 is inserted in the latching hole 444 So as to have a right triangular shape that gradually increases toward the opposite side from the leading end side to allow easy insertion.

In addition, a housing groove 436 having a diameter corresponding to the projection groove 424 of the cylindrical projection 426 is formed at the center of the bottom surface of the first housing 430.

A bolt hole 438 is formed through the four corners of the bottom surface of the first housing 430 so that the first housing 430 is bolted to the door 410 through the bolt hole 438, So that it is firmly fixed.

A coil spring 450 is interposed between the first housing 430 and the rotating disk 420. One end of the coil spring 450 is engaged with the housing groove 436 and the coil spring 450 Is inserted into the projection groove 424 of the cylindrical projection 426 and is engaged.

Accordingly, the rotating disk 420 is configured to receive an elastic force by the coil spring 450.

A slit 442 is formed at one long side of the second housing 430.

The slit 442 is formed long enough for the latch 422 to penetrate and to be rotated within a certain radius.

In addition, a latching hole 444 is formed through both sides of both sides of the second housing 430 so that the latching protrusion 434 can be engaged with the latching protrusion 434.

In addition, a through hole 446 having a diameter corresponding to the fitting groove 428 is formed at the center of the upper surface of the second housing 430, and the first gear 446 is formed on the circumference of the through hole 446, And a second gear T2 meshing with the first gear T1 are formed in a circular shape and are designed to be rotatable only in one direction while being engaged with each other and to be prevented from rotating in a reverse direction.

In addition, the shaft protrusion 428a penetrates through the through hole 446 and is exposed to the outside, and the dial 460 is inserted into the shaft protrusion 428a.

The dial 460 is formed so that a cylindrical fitting guide 462 protrudes from one side of the dial 460 so as to be rotatable about the axis projection 428a so as to be inserted into the through hole 446 and the fitting groove 428 And a square fitting hole 464 which is integrally formed with the fixing groove 428b protrudes from the center of the circle of the fitting guide 462. [

Therefore, when the dial 460 is assembled, the square fitting hole 464 is fitted into the fixing groove 428b and the fitting guide 462 is fitted into the fitting groove 428. [

In this state, when the dial 460 is rotated in one direction, the rotary disk 420 rotates while making a "tongue" sound, and at the same time, the latch 422 rotates.

On the contrary, when the first and second gears T1 and T2 rotate in the opposite directions, the first and second gears T1 and T2 are locked because they are engaged with each other.

This is because the first and second gears T1 and T2 are always engaged with each other because the coil spring 450 always pushes the rotating disc 420 toward the second housing 440 side, The latch 422 is locked with the latch 402 to lock it.

On the other hand, the user depresses the dial 460 momentarily. Then, when the coil spring 450 is compressed, the teeth coupling between the first and second gears T1 and T2 is released. Therefore, when the coil spring 450 is rotated in the opposite direction, it returns smoothly.

On the other hand, the shaft of the motor means 300 is connected to the rotary shaft means 500 through the body, and the operation connecting member 600 is horizontally installed at the end of the rotary shaft means 500.

The operating connection member 600 is preferably formed in a rod shape having a square cross section and having a predetermined length. In addition, it is preferable to use an alloy of copper and aluminum or a mixture of copper and aluminum as the material of the operation connecting member 600, because it is a material having high electrical conductivity.

The connecting member 700 for connecting and disconnecting the voltage and the current while being disconnected from the grounding bar 720 or detached from the grounding bar 720 while being rotated by the driving of the motor means 300, And is fixedly installed on both sides of the housing 800.

5 and 6, the connection connecting member 700 is formed such that a distribution line is connected to one side of the fixing plate 710 and four grounding rods 720 are formed on the other side to form a quadrilateral shape And a space for inserting the operating connecting member 600 is formed between the adjacent ground bar 720 and the ground bar 720.

8, the connection connecting member 700 may have a distribution line connected to one side of the fixing plate 710 and a plate-shaped ground terminal 720a at the other side. As shown in FIG. 1, an operation lever 900 for manually operating the motor means 300 in an emergency can be installed inside the main body 400.

The battery means 200 is further connected to a solar unit T1 using solar light as a power source to supply power to the battery means 200 in the event of failure of the distribution line.

The operation state of the present invention having the above-described structure will be described. The sensor means provided on the front end side and the rear end side of the power distribution line passing through the side straps are provided for each side strap, and the current or voltage between the side straps can be measured have.

The current or voltage measured by the sensor means is transmitted to the communication module 110. The communication module 110 communicates with another neighboring communication module (not shown) to measure the voltage or current value Send and receive.

The signal transmitted to the communication module 110 may be transmitted to a central control system (not shown).

In addition, each of the communication modules 110 may transmit the detected detection signals to the central control system so as to determine whether a normal voltage or a normal current is supplied to the central control system.

Meanwhile, the signal transmitted to the communication module 110 is transmitted to the CPU 100, and the signal transmitted from the communication module 110 to the CPU 100, that is, the detection signal that detects the voltage and the current, The CPU 100 determines whether there is a failure due to the current or voltage calculation in real time and transmits the result to an upper system.

For example, if the signal value transmitted from the sensor means provided at the front end side and the rear end side of the distribution line is calculated by the CPU 100 to be a normal signal, the current state is maintained. However, .

When the motor means 300 is rotated by the signal transmitted from the CPU 100, the rotary shaft means 500 connected to the shaft of the motor means 300 is also rotated to rotate. When the rotary shaft means 500 is rotated, The operating connection member 600 horizontally installed at the end of the means 500 also rotates as shown in FIG.

When the position of the operating connecting member 600 positioned between the four grounding rods 720 and the grounding bar 720 provided on one surface of the fixing plate 710 of the connecting connection member 700 is 90 The position of the operating connecting member 600 connected to the space portion between the grounding rod 720 and the grounding rod 720 is changed and the grounding force with the grounding rod 720 is released and separated.

8, the connection connecting member 700 has a power distribution line connected to one surface of the fixing plate 710 and a plate-shaped ground terminal 720a at the other side, .

On the other hand, the motor unit 300 is actuated to perform a function of separating / returning the fault section of the power distribution line more quickly and always receiving the power supply by the power storage means even if the power is disconnected for a long time, .

When the operation connecting member 600 can not be operated due to a failure of the CPU 100 or the motor means 300, the substation manager and the operator come out of the accident point and open the door, The means 300 can be actuated to manually disconnect / return the connection of the operative connecting member 600 and the connecting connecting member 700.

As shown in FIG. 3, the communication module 110 may be configured as a wire, and the communication module 110 may be wirelessly used as shown in FIG. 7.

100: CPU 110: Communication module
200: accumulator means 300: motor means
400: main body 500: rotary shaft means
600: operative connecting member 700: connecting connecting member
800: Operation lever 900: Operation lever

Claims

A wired or wireless communication module (110) for receiving a measurement signal of a sensor means for detecting a voltage and a current at a lower end of the distribution line and transmitting the received signal value in real time; A CPU (100) for determining in real time the strength of the signal transmitted from the communication module (110) based on a fault current and a voltage; A storage means (200) connected to the CPU (100) and charged by a power source flowing through a distribution line; Motor means 300 connected to the CPU 100 and driven by an operation signal of the CPU 100; A main body 400 having the CPU 100, the battery unit 200, and the motor unit 300 installed inside and having a door 410; Rotating shaft means (500) connected to the shaft of the motor means (300); An operating connection member (600) horizontally installed at an end of the rotary shaft means (500); A connection connecting member 700 connecting and disconnecting voltage and current by insertion and removal while the operating connecting member 600 is rotated by driving the motor means 300; And a cover member (800) for protecting the operation connecting member (600) and the connecting connecting member (700);
The connection connecting member 700 is formed such that a power line is connected to one surface of the fixing plate 710 and four grounding rods 720 are formed on the other side to form a quadrilateral shape and the grounding rod 720 and the grounding rod 720 are connected to each other. A space portion into which the operation connecting member 600 is inserted is formed; An operation lever 900 for manually operating the motor means 300 in an emergency is further provided inside the main body 400; A solar cell using solar light as a power source is further connected to the storage means 200;
The door 410 is provided with a latch 422 for controlling the opening and closing of the door 410. A latch 402 is fixed to the latch 400 and the latch 402 is rotated, The fixture 402 is shaped to have a "C" shaped fixing groove 404 and is fixed on the body 400 through a bolt; The latch 422 is a plate-like member protruding in a rectangular shape from a part of the circumferential surface of the rotating disk 420; The rotating disk 420 is hermetically sealed by the first and second housings 430 and 440; The first and second housings 430 and 440 have a square box shape with one side opened; A cylindrical protrusion 426 protrudes from one side surface of the rotating disc 420 and a fitting groove 428 with a diameter corresponding to the outer diameter of the cylindrical protrusion 426 is formed on the other side of the rotating disc 420. An axial projection 428a protrudes from the bottom surface of the fitting groove 428; A circular first gear T1 protrudes from the other side surface of the rotating disc 420 along the circumference of the fitting groove 428; The first housing 430 has a cylindrical protrusion 426 and an opening formed around the opened portion of the first housing 430. The first housing 430 has a stepped portion with respect to the body of the first housing 430, 432 are protruded; On both sides of the short side of the fitting portion 432, a pair of locking projections 434 are formed integrally with each other; The engaging projection 434 is configured to have a right triangular shape gradually increasing toward the opposite side from the leading end so as to enter the engaging hole 444 while entering the engaging hole 444; A housing groove 436 having a diameter corresponding to the protrusion groove 424 of the cylindrical protrusion 426 is formed at the center of the bottom surface of the first housing 430; A bolt hole 438 is formed at four corners of the bottom surface of the first housing 430; A coil spring 450 is interposed between the first housing 430 and the rotating disk 420. One end of the coil spring 450 is inserted into the housing groove 436 and engaged with the coil spring 450, And the other end is engaged with the projection groove 424 of the cylindrical projection 426; A slit 442 is formed at one long side of the second housing 430; The latch 422 is passed through the slit 442; At both sides of both sides of the second housing 440, a latching hole 444 is formed through which the latching protrusion 434 is inserted and fixed after the latching protrusion 434 is inserted. A through hole 446 having a diameter corresponding to the fitting groove 428 is formed at the center of the upper surface of the second housing 430; A second gear (T2) for tooth-engaging with the first gear (T1) is formed around the through hole (446) in a circular shape; The shaft protrusion 428a penetrates through the through hole 446 and the dial 460 is inserted and fixed while being exposed to the outside so that the shaft protrusion 428a can be rotated when the dial 460 is rotated;
A cylindrical fitting guide 462 protrudes from the dial 460 so that the through hole 446 and the fitting groove 428 are formed in the center of the protruding surface of the shaft protrusion 428. [ , And a square fitting hole (464) inserted into the fixing groove (428b) further protrudes from the center of the circle of the fitting guide (462) .