JPS6352610A - Composite disconnector - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) This invention is a composite disconnector used as one of the equipment of a power plant or substation, or a power transmission line for fault detection or for shortening the time for power outage work. This relates to a composite disconnect switch installed on a utility tower.

(Conventional technology) In recent years, due to the increase in the amount of electric power equipment, comprehensive automation of equipment, and social demands for a stable supply of electricity, reducing equipment failures and accidents has become one of the important issues in equipment operation. ing.

Among these, a large number of disconnectors are installed, and for example, an air-open type disconnector 61 as shown in FIG. 15 is used. To explain this disconnector 61, a base 63 is horizontally erected and fixed at the upper end of a pedestal 62 that is erected and fixed on a foundation, and fixed support insulators 64.6 are mounted on the top surface of both ends of the base 63.
5 is erected, and clip-shaped fixed contacts 66 and 67 are supported at the upper ends thereof. A movable support insulator 68 is rotatably supported upright on the upper surface of the central portion of the base 63, and the upper end of the movable support insulator 68 corresponds to the fixed contact 66, 67 so as to be able to move toward and away from it. A movable contact rod 69 is supported horizontally. The contact surfaces of the fixed contacts 66 and 67 are coated with lubricating oil to reduce sliding resistance due to friction.

Such air-open type disconnectors are arranged as shown in FIGS. 16 and 17 within the premises of a substation or the like. That is, 61A is a disconnector 6 connected to the lead-in overhead wire 5A pulled down from the line side power transmission line 4 and the connecting wire 5B.
1B and 61G are disconnectors arranged and connected before and after the bus bar 3. In addition, 61D is a disconnector for bus bar division, and CB is a breaker. In this way, many disconnectors have traditionally been installed within the premises of substations and the like.

(Problems to be Solved by the Invention) Since the above-mentioned conventional disconnecting switch is air-insulated, the insulation dimension becomes large, resulting in a large base length, which results in a large device, and its installation requires a large area and Since the conventional disconnecting switch was provided separately for each power transmission line, there was a problem in that the area required for installing each device became large.

In addition, in the conventional disconnect switch, the fixed contacts and movable contact rods are exposed outdoors, so dust may stick and solidify, especially in the lubricant-applied area, and the lubricant may leak or evaporate due to wind and rain, causing friction. That is, the sliding resistance increases, resulting in incomplete closing, incomplete contact, or inability to turn on and off when the disconnector is turned on and off.

Structure of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a line side insulator pipe and a load side insulator pipe protruding from a tank in opposite directions,
In the center of these insulators, another insulator tube on the busbar side is protruded in a direction almost orthogonal to the two insulator tubes to form an inverted T-shape as a whole, and a conductor is connected into the tank from a terminal provided at the tip of each insulator tube. at least two conductors between the inner ends of the three conductors.
A configuration is adopted in which two disconnection sections for electrically connecting and separating the two conductors are provided at at least two locations corresponding to any two of the insulator tubes.

(Function) As described above, this invention makes the disconnector into an inverted T shape, provides a plurality of disconnecting sections, and allows each of the disconnecting sections to be operated separately in the left/right direction or up/down direction, so that the line side power transmission line , at least two conductors of the bus bar and the load-side electric wire can be electrically connected to and separated from each other freely.

(Embodiment) An embodiment embodying the present invention will be described below with reference to FIGS. 1 to 14.

As shown in FIGS. 3 to 6, reference numeral 1 denotes a pedestal erected within the premises of a power station or substation, and a composite disconnector 2 of the present invention is fixed onto the pedestal 1.

The upper end of the composite disconnector 2 is connected to the busbar 3, and the right end of the composite disconnector 2 is connected to a drop-in overhead wire 5 drawn down from the line-side power transmission line 4. A load-side electric wire 6 is connected to the left end. CB is a breaker, and LS is another type of breaker. In addition, Section 3.4
The figure shows a case where the composite disconnector 2 is arranged so as to be shifted from side to side when viewed from the front, and FIGS. 5 and 6 show the case where it does not shift.

Next, the composite disconnector 2 will be explained. As shown in FIG. 1, 7 is a sealed tank at the center of the lower part of the composite disconnector 2, and is fixed on the pedestal 1. In addition,
The tank 7 and the parts that communicate with it are equipped with sulfur hexafluoride (S).
It is filled with an insulating gas such as F6).

8 is a line side insulator tube fixed to the right side end face of the tank 7 and extending laterally, the tip of which is sealed;
A line side connection terminal 9 is provided. Numeral 10 is a load-side insulator tube which is similarly fixed to the left end surface of the tank 7 and extends laterally, the tip of which is sealed, and a load-side connection terminal 11 is provided. Similarly, 12 is a bus bar side insulator tube which is fixed and erected on the upper surface of the tank 7, the upper end of which is sealed, and a bus bar side connection terminal 13 is provided.

Moreover, 2a is a disconnection section provided on the right side, left side, and upper side of the tank 7.

Next, the composite disconnector 2 will be explained in more detail.

As shown in FIG. 7, 24A is a support metal fitting 22 fixed on a movable insulating support member 21 fixed to the bottom surface of the tongue foot.
A movable contact rod is pivotally supported by a pin 23 on the upper part of the movable contact rod, and can be reciprocated left and right by external operation of the movable insulating support member 21.

25 is a cylindrical mounting conductor that is fixed with a bolt to the line side conductor 14 connected to the line side connection terminal;
29A is a support cylinder fixed to the lower end of the insulating support member 30 fixed to the upper surface inside the tank, and the support member 2 is fixed to the tip of the mounting conductor 25 and the tip of the mounting member 25.
6 is inserted and supported. 27A is a coil spring 2 attached to the outer periphery of the support member 26 and the outer periphery of the movable contact rod 24A.
8 is the first fixed contact that is supported.

31 is a cylindrical shield tube fixed to the insulating support member 30, and the first fixed isthmus 27A1 support member 2
6 and the mounting conductor 25.

Furthermore, inside the inner end of the movable contact rod 24A, there is a movable auxiliary contact 2 that can be moved left and right by a coil spring (not shown).
4a is attached.

Next, a bipolar fixed electrode 41 that enables conduction in three directions is arranged in the center of the tank hood.The right side of the bipolar fixed electrode 41 is explained as follows: 30 is attached to the lower part of the tank 7; an insulating support member that supports the bipolar fixed electrode 41;
Reference numeral 27B is a second fixed contact that is supported by a coil spring 28 on the outer periphery of the right center portion of the bipolar fixed electrode 41.

Reference numeral 42A denotes a fixed auxiliary contact which is fastened to the bipolar fixed electrode 41 with bolts, and 31 is a shield cylinder which is also fixed to the bipolar fixed electrode 41 and covers the second fixed contact 27B.

On the left side of the bipolar fixed electrode 41, each member is configured in a direction completely opposite to that on the right side.

Next, the tank 7 corresponding to the left side of the bipolar fixed electrode 41
To explain the left side part of the tank 7, each member is configured in the completely opposite direction to the right side part of the tank 7 described above, but the mounting conductor 25 has a load side conductor connected to the load side connection terminal 11. 15 is tightened and fixed with a bolt.

Next, we will explain the structure of the tongue upper part.
Reference numeral B denotes a support tube attached to an insulating support tube 30 fixed to the upper side of the tank, through which the lower end of the busbar side conductor 16, one end of which is connected to the busbar side connection terminal 13, is inserted and supported. 2
7F is a sixth fixed contact which is supported by a coil spring 28 on the outer periphery of the lower end of the bus-side conductor 16.

31 supports! ! A shield cylinder 42C, which is fixed to 129B and covers the sixth fixed contact 27F and the support cylinder 29B, is a fixed auxiliary contact which is bolted and fixed to the bus bar side conductor 16.

Further, to explain the upper part of the bipolar fixed electrode 41, reference numeral 27E is a fifth fixed contact which is supported by a coil spring 28 on the outer periphery of the upper central part of the bipolar fixed electrode 41, and 31 is a fifth fixed contact. A shield tube 24C that covers the fixed contact 27E is a movable contact rod that vertically passes through the fifth fixed contact 27E and the bipolar fixed electrode 41, and can move toward and away from the sixth fixed contact 27F.

In addition, as shown in FIG. 1, the movable contact rod 24A.

Operating units 43A, 43B, and 43C for reciprocating 24B and 24G left and right or up and down are provided at the bottom of tank 7.

To explain the operation part 43A, as shown in FIG. Interlocking links 45A are articulated. Therefore, the rotating shaft 46 driven by a drive source (not shown), the operating lever 44A, the interlocking link 45A1, the movable support fitting 47, the insulating support member 21, and the mounting fitting 22 constitute an operating portion 43A of the movable contact rod 24A. When the operating lever 44A is rotated, the movable contact rod 24A is reciprocated in the left-right direction via the movable support fitting 47, the insulating support member 21, and the mounting fitting 22.

In addition, 48 is a fixed guide rod provided in the fixed part, and the movable support member 21 is reciprocated left and right along the fixed guide rod 48 as described above.

Furthermore, the operating section 43B is symmetrical with the operating section 43A, but has exactly the same configuration. Roughly speaking, the operation section 43G has exactly the same configuration as the operation section 43A rotated by 90 degrees.

Next, the operation of the composite disconnector configured as described above will be explained.

Now, the state of the movable contact rods 24A, 24B, and 240 shown by solid lines in FIG. 7 indicates an open circuit state in which the bipolar fixed electrode 41 is not in contact with any of the line side, load side, and busbar side.

Now, when the operating lever 44A of the operating section 43A is rotated counterclockwise by an external operation, the movable insulating support member 21, the support fitting 22, and the bottle 2 are moved via the interlocking link 45A.
3 is moved to the left, and the movable contact rod 24A is also moved to the left. The movable contact 24a and the fixed auxiliary contact 42A come into contact, and then the movable contact rod 24A contacts the second fixed contact 2
7B, and the bipolar fixed electrode 41 and the line side conductor 14 are connected to the second fixed contact 27B1 and the movable contact rod 24A1.
The first fixed contact 27A1 is electrically connected via the support member 26 and the mounting conductor 25.

Similarly, when the operating section 43B is rotated clockwise by external operation, the movable contact rod 24B is moved to the right, and the bipolar fixed electrode 41 and the load-side conductor 15 are electrically connected.

Further, when the operating portion 43G is rotated clockwise, the movable contact rod 24C is moved upward, and after the movable contact 24G contacts the fixed auxiliary contact 420, the movable contact rod 24C is moved to the sixth fixed contact 27F. The bipolar fixed electrode 41 and the bus bar side conductor 16 are electrically connected to each other through the fifth fixed contact 27E, the movable contact rod 24G, and the fixed contact 27F.

In this way, the line-side conductor 14, load-side conductor 15, and bus-side conductor 16 are all electrically connected.

When any two of these three conductors are electrically connected, it is sufficient to open the remaining one conductor and the bipolar fixed electrode 41. Therefore, as shown in FIG. 7, the movable contact rod 24 It is only necessary to return it to the state shown by the solid line by rotating it in the opposite direction to the above in the operating section.

Note that when opening the circuit, the operation can be performed in the reverse order, but at the end, the movable contacts 24A to 24C and the fixed auxiliary contact 4
2A to 42C are separated and are in a disconnected state.

In addition to the embodiments described above, this invention can also be implemented as follows.

(1) In the above embodiment, the movable contact rod 24A.

24B and 24C are arranged in the tank 7, the movable contact rod 24A is placed in the line side insulator tube 8, the movable contact rod 24B is placed in the load side insulator tube 10, and the movable contact rod 24C is placed in the bus line side insulator tube 1.
It can also be placed within 2.

(2) In the above embodiment, the disconnection section 2a is placed on the line side,
Although they are arranged in three directions, the load side and the bus bar side, they can also be arranged only in two directions, the line side and the load side, as shown in FIG.

In this way, the composite disconnector described in the above embodiment is formed in an inverted T-shape as a whole, and has three movable contact rods 24.
Since the line side conductor 14, load side conductor 15 and bus bar side conductor 16 can be electrically connected and separated by A, 24B and 24C, the wiring is streamlined as shown in Figs. 3 and 4. Since it is possible to significantly reduce the space required in a substation, and to prevent lubricating oil from leaking and dust from adhering, the performance of the composite disconnector can be maintained for a long period of time.

Furthermore, as shown in FIG. 3, the bus bar 3 can be supported by the bus bar side connection terminal 13 at the upper end of the composite disconnector 2.

Regarding the use of the composite disconnector of the present invention, for example, as shown in Figure 3.4 and Figures 5 and 6 above, the composite disconnector of the present invention can be used in place of a large number of conventional disconnectors in a substation. The line side overhead wire, the load side overhead wire, and the busbar can be used by connecting them to the line side connection terminal, the load side connection terminal, and the busbar side connection terminal, respectively.

Furthermore, as shown in Figure 9.11.12, the composite disconnector of the present invention can be installed on a power transmission line tower 51 and used for disconnecting and connecting lines at branch sections of power transmission lines. As shown in FIG. 11 or 12, reference numeral 2 denotes a composite disconnector; 58 denotes an operation box 59A installed on the steel tower 51 in the horizontal direction of the composite disconnector 2;

59B is an operating rod installed vertically along the steel tower,
Moreover, at the lower end, an operating rod and a composite disconnector 2 are installed parallel to 59B via a gear as in FIG. 11 (not shown). When the operating rod 59A is rotated by the operating box 58, the rotational force is transmitted to the operating rod 59B via the gear in the operating box 58, and the rotating force of the operating rod 59B causes the movable contact rod 24A, 24B, or 24
C reciprocates left and right or up and down, and the line side connection terminal 9
, the load side connection terminal 11 and the busbar side connection terminal 13 can be electrically connected to and separated from each other.

Furthermore, it can also be used as a disconnector for detecting ground faults in power transmission lines. To explain this, as shown in FIG. 10, the current flows through the substation 52 and the disconnector 54A.

54B1 Combined disconnector 2, the disconnector 54C flows to the load side end 53A, or the substation 52, disconnectors 54A, 54
B, load side end 53 via composite disconnector 2 and disconnector 540
Flows to B. Therefore, if a ground fault occurs between the disconnector 54D and the load side end 53B, an overcurrent will flow and the substation 5
No. 2 circuit breaker is activated. Then, the disconnectors 54A, 54
B, 54G, 54D and composite disconnector 2 are opened, and then disconnectors 54A to 548, composite disconnector 2, and disconnector 54C are opened.
Or, if the circuit breaker 54D is closed in order, the circuit breaker of the substation 52 will operate again when the disconnector 54D is closed, so the circuit breaker 54D will be activated again.
It can be seen that a ground fault occurred between 4D and the load side end 53B.

In this case, the disconnector mounted on the steel tower can be easily operated by remote control as shown in FIG. By operating the operation panel 57 in FIG.
The signal is transmitted via a communication line 56 or wirelessly to a control device @55 installed directly below the tower, thereby operating the composite disconnector.

Note that the power for the control device may be supplied from a battery or from a power distribution line.

To explain the above-mentioned system for detecting ground faults in power transmission lines, as shown in Fig. 14, 71 is connected to one AC source (6
KV), 72 is a transformer that reduces l pressure to 100V,
73 is a distribution board, 74 is a rectifier that changes AC to DC, 75
is a battery, 76 is a controlled device installed on site, 7
7 is the disconnect switch installed on the steel tower, 78 is the local MOD
EM, 79 is a remote MODEM, 80 is a control device, and 81 is a control i11 operating section. With such a system, the disconnect switch on the tower can be easily opened and closed by controlling the control operation section 81 at a remote location.

That is, the operation input inputted at the control operation unit 81 is converted into a signal by the control device 80, and inputted to the controlled device 76 provided on the remote tower side via the MODEM 79,78. Then, from another AC power supply 71 to a transformer 72 and a distribution board 7
3. The controlled device 76 is powered by the power supplied through the rectifier 74 or from the battery 75 to the MODEM 78.
Based on the signals from the tower, the disconnector 77 on the tower is opened and closed.

Note that 82 is a heater power supply that is supplied from the power distribution W73 to the disconnector 77.

Effects of the Invention According to this invention, the wiring in power plants, substations, etc. can be rationalized and the space required can be significantly reduced, and the leakage of lubricating oil from the composite disconnector and the adhesion of dust can be prevented. Therefore, the performance of the composite disconnector can be maintained well for a long period of time, and the busbar can also be supported by the busbar side connection terminal at the upper end of the composite disconnector.

Moreover, it is possible to shorten the time required to search for ground faults, thereby shortening the power outage time, and also to significantly shorten the work power outage time and reduce the number of working personnel, which is an excellent effect.

[Brief explanation of the drawing]

1 and 2 are schematic front cross-sectional views showing an embodiment embodying the present invention, FIGS. 3 and 5 are schematic front views showing wiring in a substation, and FIG. 6 is a plan view of the wiring corresponding to FIG. 5, FIG. 7 is an enlarged front sectional view of the composite disconnector, FIG. 8 is a schematic front sectional view of the operating section, and FIG. 9 is a plan view of the corresponding wiring. Figure 10 is a schematic diagram showing how the composite disconnect switch is installed on a steel tower, Figure 10 is a wiring diagram showing the method for ground fault detection, and Figures 11 and 12 are diagrams showing how the composite disconnect switch is installed on the tower. A schematic perspective view, FIG. 13 is a conceptual diagram showing remote control of a composite disconnector, FIG. 14 is a system diagram corresponding to FIG. 13, and FIG. 15 is a perspective view showing a conventional air-open type disconnector. Figure 16 is a front view showing the wiring of a conventional substation, Figure 17
The figure is a plan view corresponding to FIG. 16. 2... Composite disconnector, 2a... Disconnecting section, 3... Bus bar, 4... Line side power transmission line, 6... Load side electric wire, 7...
...Tank, 8...Line side insulator pipe, 10...Load side insulator pipe, 12...Bus bar side hard pipe. Patent applicant: Tohoku Electric Power Co., Ltd. Nippon Insulator Co., Ltd. Agent: Patent attorney On 1) Hironobu Drawing No. 2 Drawing No. 4 Fig. 5 Drawing No. 5 Fig. 6 Drawing No. 8 Fig. 10

Claims (1)

[Claims] 1. Line side insulators (from the tank (7) in opposite directions)
8) and a load-side insulator tube (10) are provided protrudingly, and another generatrix-side insulator tube (12) is provided protrudingly in a direction substantially perpendicular to both of the above-mentioned insulator tubes at the center thereof, forming an inverted T-shape as a whole. At the same time, connect the terminal provided at the tip of each insulator to the tank (7
) with at least two conductors between the ends of the three conductors.
A composite disconnector characterized in that two disconnector sections (2a) for electrically connecting and separating two conductors are provided at two locations corresponding to at least any two insulator tubes. 2. The disconnection part (2a) connects both the left and right fixed contacts (27) of the bipolar fixed electrode (41) provided at the fixed position in the tank (7).
A fixed contact (27A, 27C) is supported to face the fixed contacts (27B, 27C) and is electrically connected to the line side conductor (14) and the load side conductor (15), respectively. 27D) and both fixed contacts (27A, 27
The composite disconnector according to claim 1, comprising movable contact rods (24A, 24B) that reciprocate to open and close between (27C, 27D) and (27C, 27D). 3. The disconnection part (2a) connects the fixed contacts (27B, 27C, 27E) on both the left and right sides and the upper part of the bipolar fixed electrode (41) provided at the fixed position in the tank (7).
A fixed contact (2) is supported to face the line side conductor (14), load side conductor (15) and bus bar side conductor (16), respectively.
7A, 27D, 27F) and both fixed contacts (27A, 27
B) between (27C, 27D) and (27E, 27F)
Movable contact rods (24A, 24B) that reciprocate to open and close between
, 24C). 4. The movable contact rods (24A, 24B, 24C) are connected to the tank (
7) or an insulator (8, 10, 12). 5. The movable contact rods (24A) and (24B) are operated by operating levers (44A, 44) provided on the rotating shaft (46) that is rotated.
B, 44C) and an interlocking link (45A, 4) to the same lever.
5B, 45C), and a movable insulating support member (21) that connects the movable support fitting (47) and a movable contact rod. (43A, 43B, 43C) The composite disconnector according to claim 2 or 3, which is externally operated by (43A, 43B, 43C). 6. Claim 1 in which the tank (7) is a closed container
Composite disconnector as described in section. 7. The composite disconnector according to claim 6, characterized in that an insulating gas is hermetically sealed in the airtight container of the tank (7). 8. The composite disconnector according to claim 7, wherein the insulating gas is sulfur hexafluoride (SF6) gas.