JPH0992544A - Gas insulating stationary induction electrical equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide gas insulating stationary induction electrical equipments, which save the installation spaces for the equipments by realizing a miniaturization of the equipments and a reduction in the cost of the equipments and improve the freedom of a layout constitution. SOLUTION: Stationary induction electrical equipments are respectively housed in tanks 1A and 1B filled with insulating gas. The tanks 1A are arranged in parallel by three units in accordance with the three phases of a system to connect the tanks 1A with each other through communicating tubes 9, whereby a three-phase device 10A is constituted. The tanks 1B are arranged in parallel by three units in accordance with the three phases of the system to connect the tanks B with each other through communicating tubes 9, whereby a three-phase device 11B is constituted. The devices 10A and 11B are arranged in the series direction and cooling system equipments 12 are respectively connected only with the sides of the tanks 1A of the device 10A. The tanks 1A and 1B, which are the same phase, are respectively connected with each other via communicating pipings 15, which are respectively provided with a flow rate control valve 14, and at the same time, stationary induction electrical equipment main bodies in the interiors of the tanks 1A and 1B are electrically connected in series.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated static induction machine for cooling a static induction machine in a tank by circulating an insulation gas such as SF6 gas with a blower, and particularly to each phase of the system. The present invention relates to a gas-insulated static induction machine in which a corresponding static induction machine body is housed in a separate tank.

[0002]

2. Description of the Related Art In recent years, an insulating gas such as SF6 gas is often used as an insulating / cooling medium for a static induction electric device such as a transformer or a reactor. Since SF6 gas has the characteristics of non-combustibility, inertness, and light weight compared to insulating oil, gas-insulated static induction equipment using SF6 gas has excellent safety, does not easily deteriorate, and is lightweight. There is an advantage that you can.

An example of such a gas-insulated static induction device conventionally proposed will be described below with reference to FIGS. 5 and 6. FIG. 5 is a side view of the single-phase gas-insulated static induction generator, and FIG. 6 is a plan layout diagram when two sets of three-phase devices are installed. That is, as shown in FIG. 5, the iron core 2 and the winding 3 constitute a stationary induction machine body, and the stationary induction machine body is housed in the tanks 1A and 1B. An insulating gas 4 such as SF6 gas is filled in the tanks 1A and 1B.

As shown in FIG. 6, the tanks 1A are arranged in parallel one by one in correspondence with the three-phase system.
Then, the adjacent tanks 1A are connected by the communication pipes 9 to form a set of three-phase devices 10A.
A cooling system device 12 is connected to the outside of each tank 1 via a connection pipe 8. The cooling system device 12 includes a cooler 6 for cooling the insulating gas 4 and a blower 7 for forcibly circulating the insulating gas 4.
Similarly to the tank 1A, the tank 1B is also arranged one by one for each phase and connected by the communication passage 9 to form a three-phase device 12B. The cooling system device 12 is also connected to each tank 1B.

The in-phase static induction body bodies of the three-phase devices 11A and 12B are electrically connected to each other, but the static induction body bodies have the same ratings in the tank 1A and the tank 1B. May also be different.

In an example of the gas-insulated static induction generator having the above-mentioned structure, the insulating gas 4 cooled by the cooler 6 is sent to the lower part of the tanks 1A and 1B by the blower 7. The insulating gas 4 rises while cooling the iron core 2 and the winding 3, and returns from the upper part of the tanks 1A and 1B to the cooler 6 and the blower 7 via the connecting pipe 8.

Here, in the three-phase device 11A, the tanks 1A arranged in parallel are connected by a communication pipe 9. Therefore, for example, even when the operating number of the blowers 7 is reduced due to the load condition on the static induction electric machine, or when the operating number of the blowers 7 is reduced due to the failure of the blower 7,
The insulating gas 4 flowing into the tank 1A becomes relatively uniform. This also applies to each tank 1B of the three-phase device 12B.

[0008]

However, the conventional examples of the gas-insulated static induction electric appliances as described above have the following problems. That is, when it is necessary to install a plurality of the above three-phase devices in a substation or the like, the number of tanks as a whole must be increased and the number of cooling system devices for connecting to each tank must be increased. For this reason, the gas-insulated static induction generator becomes large-scaled and large-sized to require a large installation space, which leads to an increase in the cost of the substation equipment.

When the gas-insulated static induction equipment becomes large in size and the installation space increases as described above, the arrangement position of other equipment in the substation is restricted, and the arrangement configuration becomes complicated.

The present invention has been proposed to solve the above-mentioned problems of the prior art.
An object of the present invention is to provide a gas-insulated static induction generator that is compact and low-cost, saves an installation space, and improves the degree of freedom in arrangement and configuration.

[0011]

In order to achieve the above object, the invention according to claim 1 is such that a static induction electric device main body is housed in a plurality of tanks filled with an insulating gas, and the insulating gas is forcedly circulated. Gas insulated static induction electric machine equipped with a cooling system device consisting of a blower for air conditioning and a cooler for cooling the insulating gas, and a three-phase device in which three tanks are arranged in parallel corresponding to a three-phase system , A plurality of sets are installed in the series direction, and between the tanks of the same phase in the plurality of sets of three-phase devices are connected by a communication pipe equipped with a flow rate adjusting valve so that the insulating gas can flow, and in the series direction. The cooling system device is connected to each tank in a set at both ends or a set at one end of the set of three-phase devices.

In the above-mentioned invention according to claim 1, the cooling system equipment is provided only in the group of both ends or the group of one end of the plurality of three-phase devices installed in the series direction.
Since the in-phase tanks of each three-phase device are connected by communication piping, insulating gas can flow between each tank,
In-phase tanks can share cooling system equipment. Since the static induction generator with a high load has a higher temperature than other static induction generators, the flow control valve is adjusted so that more insulating gas is supplied to the tank accommodating such a static induction generator. Adjust the opening and closing. By sharing the cooling system device in this way, it is possible to realize the downsizing and cost reduction of the device as compared with the case where the cooling system device is separately provided for all the tanks.

According to a second aspect of the present invention, the main body of the stationary induction machine is housed in a plurality of tanks filled with insulating gas, and the cooling is composed of a blower for forced circulation of the insulating gas and a cooler for cooling the insulating gas. In a gas-insulated static induction electric machine equipped with a system device, the tank is set to 3 in correspondence with a 3-phase system.
A plurality of sets of three-phase devices arranged in parallel are provided, and at least two sets of three-phase devices are installed in the parallel direction, while other three-phase devices are installed in the serial direction, and In-phase tanks in the three-phase device are connected by a communication pipe equipped with a flow rate adjusting valve so that the insulating gas can flow, and at least one tank in the three-phase device is connected to the cooling system device. It is characterized by having done.

In the invention according to claim 2 as described above, since at least two sets of three-phase devices are installed in the parallel direction, compared with the case where all three-phase devices are installed in the serial direction.
The space in the serial direction is reduced, and the space can be effectively used.

According to a third aspect of the present invention, in the gas-insulated static induction electric device according to the first or second aspect, in at least one set of three-phase units of the plurality of sets of three-phase units, each tank is The static induction generator is a transformer, and the cooling system device is directly connected to the tank.

In the invention according to claim 3 as described above, when the three-phase device having the static induction electric transformer as the transformer and the three-phase device having the static induction electric reactor as the reactor are configured, the transformer and the reactor are If the capacity is the same, the transformer usually has a larger load capacity. Therefore, more insulating gas is required on the transformer side, but in the invention according to claim 3, since the cooling system device is directly connected to the tank accommodating the transformer, an appropriate amount of insulating gas is supplied. Reserved.

According to a fourth aspect of the invention, in the gas-insulated static induction generator according to any one of the first to third aspects,
The plurality of sets of three-phase devices are installed on different floors or indoors and outdoors for each set.

In the invention according to claim 4 as described above, since a plurality of sets of three-phase units are installed on different floors or indoors and outdoors for each set, it is possible to effectively utilize the installation space in the plane direction. it can.

[0019]

1 to 4 show an embodiment of the present invention.
Will be described below. The same parts as those of the conventional example shown in FIGS. 5 and 6 are designated by the same reference numerals and the description thereof will be omitted.

(1) First Embodiment One embodiment corresponding to the invention described in claims 1 and 3 will be described below as a first embodiment with reference to FIG. 1. FIG. 1 is a plan view showing the arrangement configuration of this embodiment.

(Structure) First, the structure of the present embodiment will be described. That is, as shown in FIG. 1, three tanks 1A containing a static induction electric device and an insulating gas 4 are arranged in parallel in correspondence with the three phases of the system and are connected by the communication passages 9 to form a three-phase device. 10A is configured. A three-phase device 11B is configured by arranging three tanks 1B containing the stationary induction device and the insulating gas 4 in parallel corresponding to the three phases of the system and connecting them by the communication pipe 9. The three-phase device 10A and the three-phase device 11B are arranged in series, and the cooling system device 12 is provided only on the tank 1A side of the three-phase device 10A.
Is connected. The tank 1A and the tank 1B of the same phase are connected to each other via a communication pipe 15 having a flow rate adjusting valve 14, and the static induction generator main body therein is electrically connected.

(Operation) The operation of the present embodiment having the above configuration will be described below. In the present embodiment, an example will be described in which the static induction generator housed in tank 1A is a transformer and the static induction generator housed in tank 1B is a reactor. That is, since the load of the transformer becomes high and the temperature becomes high during the daytime, most of the insulating gas 4 cooled by the cooling system device is supplied to the tank 1A by adjusting the flow rate adjusting valve 14. At this time, since the reactor having a small daytime load also has a small heat generation amount, there is no problem even if the supply amount of the insulating gas 4 to the tank 1B side is small.

On the other hand, since the reactor has a higher load and becomes hot at night, the flow rate adjusting valve 14 is adjusted so that a large amount of the insulating gas 4 is supplied also to the tank 1B. At this time, since the transformer with a low load at night also generates a small amount of heat, the supply of the insulating gas 4 to the tank 1A may be smaller than during the daytime. Therefore, there is no problem even if the amount of the insulating gas 4 flowing from the tank 1A to the tank 1B increases.

(Effect) The effects of the present embodiment as described above are as follows. That is, even when two sets of three-phase devices are arranged, the cooling system device 12 can be shared by the tanks of each phase, so that compared to the case where separate cooling system devices 12 are provided for all tanks. It can realize downsizing and cost reduction. Therefore, it is possible to save the installation space in the substation and increase the degree of freedom in the arrangement configuration of other devices.

(2) Second Embodiment Another embodiment corresponding to the invention described in claims 1 and 3 will be described below as a second embodiment with reference to FIG. 2 is a plan view showing the arrangement configuration of the present embodiment.

(Configuration) First, the configuration of the present embodiment will be described. That is, as shown in FIG.
1B and 13C are configured by arranging three tanks 1A, 1B, and 1C each containing a static induction generator and an insulating gas 4 in parallel. The three-phase devices 10A and 11B are arranged in series with the three-phase device 13C interposed therebetween, and
Cooling system equipment 12 only in tanks 1A and 1C of 0A and 13C
Is connected. In-phase tanks 1A, 1B, 1C are
The tanks are connected to each other via a communication pipe 15 having a flow rate adjusting valve 14, and the main body of the stationary induction machine inside thereof is electrically connected in series.

(Operation) The operation of the present embodiment having the above configuration will be described below. In the present embodiment, an example will be described in which the static induction generator housed in tanks 1A and 1C is a transformer and the static induction generator housed in tank 1B is a reactor. That is,
In the daytime, the load of the transformer becomes high and the temperature becomes high. Therefore, most of the insulating gas 4 cooled by the cooling system device 12 is adjusted by adjusting the flow rate adjusting valve 14.
It is supplied to the A and 1C sides. At this time, the reactor with less load during the day also generates less heat, so the tank 1
There is no problem even if the supply of the insulating gas 4 to the B side is small.

On the other hand, since the reactor has a higher load and becomes hot at night, the flow rate adjusting valve 14 is adjusted so that a large amount of the insulating gas 4 is supplied also to the tank 1B. At this time, since the transformer with a low load at night also generates a small amount of heat, the tanks 1A, 1C to 1B
There is no problem even if the amount of the insulating gas 4 flowing to the side increases.

(Effects) The effects of this embodiment as described above are as follows. That is, even when three sets of three-phase devices are arranged, the cooling system device 12 can be shared for each phase tank by the central three-phase device 11B and the three-phase devices 10A and 13C on both sides thereof. Therefore, downsizing and cost reduction can be realized. Therefore, it is possible to save the installation space in the substation and increase the degree of freedom in the arrangement configuration of other devices.

(3) Third Embodiment Another embodiment corresponding to the invention described in claims 1 and 3 will be described below as a third embodiment with reference to FIG. Note that FIG. 3 is a plan view showing the arrangement configuration of the present embodiment.

(Configuration) First, the configuration of the present embodiment will be described. That is, as shown in FIG.
1B, 13C, 16D is a static induction generator and insulating gas 4
It is configured by arranging three tanks 1A, 1B, 1C, and 1D each accommodating each of them in parallel. All three-phase devices 10A, 11B, 13C, 16D are three-phase devices 10A, 1
6D are arranged in series so as to be located at both ends, and the cooling system device 12 is connected only to the tanks 1A and 1D in the three-phase devices 10A and 16D at both ends. In-phase tanks 1A, 1
The tanks B, 1C, 1D are connected to each other via a communication pipe 15 provided with a flow rate adjusting valve 14, and the main body of the stationary induction machine is electrically connected in series.

(Operation) The operation of the present embodiment having the above configuration will be described below. In the present embodiment, an example will be described in which the static induction generators stored in the tanks 1A and 1D are transformers and the static induction generators stored in the tanks 1B and 1C are reactors. That is, since the load of the transformer becomes high and the temperature becomes high in the daytime, most of the insulating gas 4 cooled by the cooling system device 12 is supplied to the tanks 1A, 1D by adjusting the flow rate adjusting valve 14. To do so. At this time, since the reactor with a small load during the day also generates a small amount of heat, there is no problem even if the supply of the insulating gas 4 to the tanks 1B and 1C is small.

On the other hand, the load of the reactor becomes higher and the temperature becomes higher at night, so that the flow rate adjusting valve 14 is adjusted so that a large amount of the insulating gas 4 is supplied also to the tanks 1B and 1C. . At this time, since the transformer with a low night load has a small amount of heat generation, there is no problem even if the amount of the insulating gas 4 flowing from the tanks 1A and 1D to the tanks 1B and 1C increases.

(Effects) The effects of this embodiment as described above are as follows. That is, even when four sets of three-phase devices are arranged, the cooling system device 12 should be shared for each phase tank by the central three-phase devices 11B and 13C and the three-phase devices 10A and 16D on both sides thereof. As a result, downsizing and cost reduction can be realized. Therefore, it is possible to save the installation space in the substation and increase the degree of freedom in layout of other devices.

(4) Other Embodiments The present invention is not limited to the above-described embodiments, but the number, arrangement, etc. of each member can be appropriately changed. For example, the following can be configured as an embodiment corresponding to the invention described in claim 2. That is, in the third embodiment, all the in-phase tanks 1A, 1B, 1C and 1D are arranged in series, but in the present embodiment, as shown in FIG. The tanks 1B and 1C of 11B and 13C are installed in a parallel direction, and predetermined connections are made as in the above-described embodiment. With such a configuration, the same effect as that of the above-described embodiment can be obtained, and the length in the series direction can be reduced, so that the space in this direction can be effectively used.

Further, as one embodiment corresponding to the invention described in claim 4, the following can be constructed. That is, the three-phase devices 10A and 11B according to the above-described embodiment are separately installed on different floors or indoors and outdoors. With such a configuration, the same effect as that of the above-described embodiment can be obtained, and the installation space in the plane direction can be effectively used.

Further, the number of three-phase devices and the number of combinations of transformers and reactors in the tank can be freely increased or decreased, and it is possible to use all transformers or all reactors. The ratings are not limited to the same rating and can be freely changed by combining different types.

The cooling system equipment may be connected to either the transformer side or the reactor side. However, in the case of a transformer and a reactor having the same capacity, the transformer generally has a larger load capacity, so that it is more insulated than the reactor. More gas is needed. Therefore, it is often more effective to directly connect the cooling system device to the tank on the transformer side as in the above embodiment.

[0039]

According to the present invention as described above, a plurality of sets of three-phase devices are installed in series and the cooling system devices are shared, thereby realizing downsizing and cost reduction and saving the installation space. It is possible to provide a gas-insulated static induction generator with improved flexibility in arrangement and configuration.

[Brief description of drawings]

FIG. 1 is a plan view showing an arrangement configuration of a first embodiment of a gas-insulated static induction generator of the present invention.

FIG. 2 is a plan view showing an arrangement configuration of a second embodiment of a gas-insulated static induction generator of the present invention.

FIG. 3 is a plan view showing an arrangement configuration of a third embodiment of a gas-insulated static induction generator of the present invention.

FIG. 4 is a plan view showing an arrangement configuration of another embodiment of the gas-insulated static induction generator of the present invention.

FIG. 5 is a side sectional view showing an example of a conventional gas-insulated static induction generator.

FIG. 6 is a plan view showing an arrangement configuration of an example of a conventional gas-insulated static induction generator.

[Explanation of symbols]

 1A, 1B, 1C, 1D ... Tank 2 ... Iron core 3 ... Winding 4 ... Insulating gas 6 ... Cooler 7 ... Blower 8 ... Connection pipe 9 ... Communication pipe 10A, 11B, 13C, 16D ... Three-phase device 12 ... Cooling system Equipment 14 ... Flow control valve 15 ... Communication piping

Claims (4)

[Claims] 1. A gas having a static induction electric device main body housed in a plurality of tanks filled with insulating gas, and a cooling system device including a blower for forced circulation of the insulating gas and a cooler for cooling the insulating gas. In an isolated static induction electric device, a plurality of three-phase devices, each of which is configured by arranging three tanks in parallel corresponding to a three-phase system, are installed in series, and the same-phase tanks in the plurality of three-phase devices are installed. Between the two ends of the plurality of sets of three-phase devices installed in the series direction or each of the sets at one end, while connecting the spaces by a communication pipe equipped with a flow rate adjusting valve so that the insulating gas can flow. A gas-insulated static induction machine characterized in that the cooling system device is connected to a tank. 2. A gas having a static induction electric device main body housed in a plurality of tanks filled with insulating gas, and a cooling system device including a blower for forced circulation of the insulating gas and a cooler for cooling the insulating gas. In an insulated static induction electric machine, a plurality of sets of three-phase devices each having three tanks arranged in parallel corresponding to a three-phase system are provided, and at least two sets of three-phase devices are installed in parallel. The other three-phase devices are installed in series, and the tanks of the same phase in the plurality of sets of three-phase devices are connected by a communication pipe equipped with a flow rate adjusting valve so that the insulating gas can flow. A gas-insulated static induction machine, wherein the cooling system device is connected to each tank in at least one set of three-phase devices. 3. In at least one set of three-phase devices among the plurality of sets of three-phase devices, the static induction electric device in each tank is a transformer, and the cooling system device is directly connected to the tank. The gas-insulated static induction generator according to claim 1 or 2. 4. The plurality of sets of three-phase units are installed on different floors or indoors / outdoors for each set.
The gas-insulated static induction generator according to any one of 1.