JPH0154812B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a puffer type gas sheath disconnector, and more particularly to a puffer type gas sheath disconnector equipped with a sheath rupture resistance device.

For power system disconnectors, see Figure 1a,
As shown in the circuit diagram and operating characteristic diagram in b, before the main contact S _M , which is in the disconnected state O, is changed to the closed state C by an operation command, a resistive contact connected in parallel between A and B of this circuit is S _RC is also turned on from the disconnected state O by an operation command, and the closing resistor R _C is inserted into the system, making it the closing state C. After a certain period of time t _C , the main contact is turned on.
S _M becomes closed state C, and conversely, resistance contact S _RC returns to closed state O, and main contact S _M continues this state and returns to closed state C with the next closed operation command.
Mustard is in a cut state O. As described above, the resistor closing method that suppresses the closing surge using the closing resistor R _C is known. Also, Figure 2 a,
In the circuit shown in the circuit and operating characteristics diagram of b, the circuit shown in Fig. 1 is further connected in parallel with a shunt breaker contact S _Rt having a shunt breaker resistor R _t . In this case, the operation is the same as that shown in Fig. 1 except that the shear resistance contact S _Rt operates at the same time as the main contact S _M. Then, the main contact is
After S _M changes from the on state C to the off state O,
The sheath break resistor R _t is inserted into points A and B of the system until a certain time t ₀ has elapsed from the opening, and then the sheath break resistance contact S _Rt is changed from the closed state C to the shear break state O. That is. In this circuit, a resistor shear breaker system is also known in which the shear breaker resistor R _t is used to suppress the shear rupture surge and to increase the shear breaker capacity by reducing the shear breaker duty of the main contact S _M.

On the other hand, the mechanism used as a power system disconnector is
Patshua type gas shields and disconnectors, which have a simple structure and high performance, are the mainstream.

A partially sectional perspective view of FIG. 3 shows the vicinity of the sheath and breakage of a grounded tank-type gas shield and disconnector. In FIG. 3, the shingle section adjusts the voltage sharing between the puffer cylinder 5 and the poles, which work together with the insulating nozzle 4 containing the stator side conductor 1, fixed main contact 2, and movable main contact 3. parallel capacitor device 6,
Inside the tank 10, a closing resistor 7 for suppressing closing surges arranged almost parallel to the stator side conductor 1, a closing resistor contact 8 working together with the puffer cylinder, and shields 9 and 9' for electromagnetic relaxation are at ground potential. The tank 10 is filled with arc-extinguishing gas at several atmospheres.

Various components such as the fixed main contactor 2, the parallel capacitor device 6, and the closing resistor 7 are placed in the shield 9, and the third
They are arranged as shown in FIGS. 4 and 5, which are cross-sectional views. In the figure, a dotted line surrounding the closing resistor 7 indicates an area necessary for maintaining insulation.

The Patshua type gas shutoff switch as mentioned above is
Compared to other shield disconnectors, such as air shield disconnectors, it has superior shield breaking performance and insulation performance, so the resistor for the shield disconnection described above is unnecessary, and the insulation strength of system equipment is improved. It would have been better if only the closing resistor was equipped.

However, in recent years, as the construction of UHV systems of 765KV or higher has become a reality, it has become necessary to reduce the dielectric strength level as low as possible for the economic efficiency of the system, and it is also necessary to suppress the rupture surge of the rupture circuit. It was inevitable. In addition, the capacity of capacitors is rapidly increasing, and there is a need for capacitance currents of 80 KA and 100 KA, and this has created the need to equip them with resistors for capacitors.

FIG. 6 shows the application of the shear break resistance device to the grounded tank type gas sheath disconnector shown in FIG. That is, the shear break resistor 11, the shear break resistor fixed side contact 12, the shear break resistor movable contact, and the small resistance pack for cutting the current flowing through the shear break resistor 11. A cutting section 13 was installed to constitute a shear breaking resistor device. Since the movable system of this device is operated by the same drive device as the main shaft and section, it is constructed on a new axis parallel to the main shaft and section.

As is clear from FIG. 7 and FIG. 8, which show the cross section of FIG. 6, the diameter of the shield 9 is increased compared to the case of FIG. There is. Each resistor 7, 11 has a
As is clear from Fig. 2, when the main shield section S _M is open and the resistance contacts S _RC and S _Rt are closed, the voltage between the poles of the main shield section S _M (voltage between AB) is applied.
Therefore, as explained in FIG. 7, when the contacts of each resistor 7 or 11 are closed, the shield 9, the mounting part 6 of the parallel capacitor device 6, the fixed main contact 2, etc., and each resistor 7 or 11 are The potentials differ by the voltage between the electrodes, and a sufficient insulation distance is required between each resistor 7, 11 and other structures. Regarding this distance, it is necessary to take into account in the insulation design that this part is directly affected by the high temperature gas with reduced insulation strength blown out from the insulating nozzle 4 of the puffer cylinder 5. From the above points, the diameter of the shield 9 increases, and therefore the diameter of the tank 10 increases. Increasing the diameter of the tank 10 is undesirable because it makes the cutter larger, more difficult to manufacture, and more expensive.

From the above points, it has been desired to suppress the increase in the diameter of the tank as much as possible and to equip it with a shear resistance device.

An object of the present invention is to provide a grounded tank-type patshua type gas insulator breaker equipped with a sill resistance device, and to suppress an increase in the diameter of the tank due to the installation of the sill resistance. It is to provide the equipment.

A feature of the present invention is that the contact mechanism of the shear break resistance device is configured separately from the others, and the contact mechanism is juxtaposed with the main sheath break section, while the shear break resistor is connected to the parallel capacitor device. The fixed contact of the contact mechanism is placed on the axial extension of one end, that is, on the axis different from that of the contact mechanism, and the fixed contact of the contact mechanism is electrically and mechanically connected to the contact mechanism side end of the shear breaking resistor through a connecting conductor. It is.

Such a configuration reduces the virtual circle on the side where the resistor of the shear break resistance device is arranged at least, and therefore reduces the diameter of the tank.
In addition, since the contact mechanism has the same potential as the main shield, disconnection, etc. on the same side, it can be configured in close proximity, and conversely, it is not subject to restrictions in placement due to the resistor.

An embodiment of the present invention is shown in FIGS. 9-12.

In the present invention, FIG. 9 and the first diagram viewed from point C
As is clear from FIG. 2, the wire break resistor 11 is
It is arranged on the axial extension of the parallel capacitor device 6 on the stator side. Although this space had not been utilized until now, it is being actively utilized for arranging the shear break resistor 11 of the shear break resistance device. As is clear from FIGS. 9 and 12, the contact point 12 on the fixed side of the shear breaker resistor 11 is not arranged on the same straight line as the shear breaker resistor 11, but on the same straight line as the shear breaker resistor 11. As shown in FIG. 10, by protruding toward the movable side at an optimal position in terms of insulation, the resistor puffer and cutter 13 on the movable side are aligned and joined to form a resistance puffer cutter. That is, the shingle breaking resistor 11 having different axes and the shingling resistor fixed side contact 12 of the contact mechanism are electrically and mechanically connected by the connecting conductor 19 having a radial component of the tank 10. There is. Furthermore, Figures 10 and 11
The dotted circle in the figure indicates the area that must be secured for insulation.

According to this embodiment, the sheath breaking resistor 11 is housed in an unused space of the conventional structure, and only the contacts are placed in parallel to the main sheath break at a position different from that of the resistor, so that the resistor shear breaking device can be used. This prevents an increase in the tank diameter due to juxtaposition of the large-diameter shunt disconnection resistor 11 and the shunt breakage, and since the shunt-break resistance fixed side contact 12 has a small diameter,
The same tank as the conventional tank can be equipped with a shear break resistance device.

The movable systems of the main sheath cutting section and the sheath cutting resistance device are each operated by a drive device (not shown) via a link mechanism. As an example, Japanese Patent Application No. 134298, 1983,
No. 145803, Japanese Patent Application No. 172043/1986, etc.

FIGS. 13 to 17 show other embodiments of the present invention, in which the shape of the stator side contact of the shear break resistance is changed. The shape of the contact can be deformed within the allowable range in terms of insulation and mechanical strength. A part of the contact point is made into an ellipse, and a compression spring 14 for generating contact pressure is attached to the first
As shown in Figure 4, it is housed in this oval shaped part. As a result, the movable side resistance shield and the discontinuous portion are butt-contacted except for the compression spring, making the structure extremely simple and increasing the degree of freedom in the shape of the puffer cylinder. FIG. 14 shows an example in which the increase in the outer diameter of the movable side high potential portion structure is reduced by further arranging a semicircular resistance puffer or cut portion 13 near the puffer cylinder 5 in the main shield cut portion.

An example in which two shielding resistors 11 are arranged in parallel is shown in FIGS. 15 and 16, and as long as they are an extension of the parallel capacitor device 6, they can be arranged as shown. In such an embodiment, the shear resistance fixed contact 12 is preferably constructed as shown in FIG. 17. That is, the welt breaking resistance fixed side contact 12 is slidably fitted into the guide 21 of the connecting conductor 20, and contact pressure is applied by the built-in spring 14.

In the embodiment described above, the sheath disconnection resistor of the sheath disconnection resistor device is arranged using the back surface of the parallel capacitor device connected in parallel to the main sheath disconnection section. This configuration will be explained with reference to FIG. 9, for example, and is particularly effective when the fixed main contact 2 of the main shaft section is supported with the configuration shown. That is, it is effective when supporting the fixed main contactor 2 etc. by the support insulator 16 which has one end fixed to the tank 10 and the stator side conductor 1 fixed to the other end.

The present invention is also effective when supporting and fixing the fixed main contactor 2 and the like using other structures as described below. For example, the lower end of the parallel capacitor device 6 in the same figure is mechanically fixed firmly, and the fixed main contact 2 etc. is fixed to the upper end, or a cylindrical or rod-shaped insulator is installed in parallel with the main shield or the cross section. The purpose is to support the fixed main contactor 2, etc., by using or a combination of these. In this case, the shear breaking resistor 11 is not limited to the rear surface of the parallel capacitor device 6, but can be placed at the position of the stator side conductor 1 which is removed in this configuration.

Furthermore, in the illustrated embodiment, a parallel capacitor device 6 is located approximately on the same axis as the shunt disconnection resistor 11.
The above was explained as a case where multiple main shields and disconnections are electrically connected in series, and control is performed by considering the voltage applied to each shield and disconnection. It may also be a parallel capacitor device provided for adjusting the re-electromotive voltage.

As described above, the shield breaking resistance device of the present invention can be roughly divided into the shield breaking resistor and the contact configuration, and the contact configuration mechanically branches the same operating force as the driving force of the main shield breaking part. The one-way disconnection resistor is arranged on a different axis from that of the contact configuration, and moreover, it is shifted toward the axis of the main or disconnection section or the axis of the parallel capacitor device. , thereby,
The virtual circle made up of the structure inside the tank can be made smaller, and the diameters of the shield and the tank can be made smaller.

[Brief explanation of drawings]

Figures 1a and b are circuit diagrams and operating characteristic diagrams of a circuit breaker with a closing resistor and a disconnector; 3 is a partially sectional perspective view of a conventional puffer type gas shield disconnector corresponding to FIG. 1, FIGS. 4 and 5 are sectional views taken along lines - and - in FIG. 3, and FIG. is a partial cross-sectional perspective view of a conventional puffer-type gas shield disconnector corresponding to FIG. 2, FIGS. 7 and 8 are cross-sectional views taken along lines - and - in FIG. 6, and FIG. Partial cross-sectional perspective view of a puffer type gas shield disconnector according to an embodiment of the invention, No. 10
The figure and FIG. 11 are the - line and XI- of FIG.
12 is a view of FIG. 9 viewed from point C; FIGS. 13 and 15 are partial sectional views showing other different embodiments of the present invention;
Figure 4 is a partial perspective view of Figure 13, and Figure 16 is a partial perspective view of Figure 15.
The side view in the figure, and FIG. 17 is a sectional view of the main part of FIG. 15. 1... Stator side conductor, 2... Fixed main contact, 3
...Movable main contactor, 5...Puff cylinder, 6
... Parallel capacitor device, 7 ... Closing resistor, 9
... Shield, 10 ... Tank, 11 ... Shrinkage resistor, 12 ... Shrinkage resistance fixed side contact, 13
...Resistance patches and fractures.

Claims (1)

[Claims] 1. Into a tank filled with arc-extinguishing gas, a puffer-type main shield section, a parallel capacitor device installed electrically and mechanically in parallel with the main shield section, and the above-mentioned main shield section. A shield disconnection resistance device is arranged in electrical parallel with the shield, and the shield disconnection resistance device consists of a shield disconnection resistor and a contact mechanism that are electrically connected in series, and the The mechanism mechanically branches the operating force of the sheath section to open and close it, and the sheath break resistance device has the sheath break resistor connected to an approximately extension of one end of the parallel capacitor device within the shield. A resistor is provided, and the shield break resistance fixed side contact of the contact mechanism provided in parallel with the main shield break part is connected to the side of the shield break resistor facing the parallel capacitor device. A puffer-type gas shield and disconnector characterized by being electrically and mechanically fixed by a connecting conductor with a plane perpendicular to the axis.