JPH08308214A - Thyristor valve - Google Patents

Abstract

PURPOSE: To obtain a thyristor valve capable of preventing the increase of a fire by initially detecting an ignition generated in a thyristor module. CONSTITUTION: A square hole 8b is formed at the mounting base 8a of a thyristor module 8, and a square hole is formed at the center of the upper frame of the upper end of a thyristor valve. Light guides 13 are arranged on the base 8a and the upper surface of the frame. An infrared detector 11 is provided at the upper part of the hole 8b, and a light emitting diode 12 is provided at the one side surface of the detector 11. The infrared ray radiated by the overheat or ignition of a snubber resistor 4 or a snubber capacitor 3 mounted at the module 8 of the lower side of the detector 11 is detected by the detector 11 mounted at the base 8a and the frame, and the diode 12 is fired by the detector 11. The light is incident to the end of the guide 13, and the signal is sent to a control board.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a thyristor valve.

[0002]

2. Description of the Related Art As is well known, high voltage, large capacity thyristor valves are used in AC / DC converters and frequency converters installed for large capacity long-distance power transmission.
Above all, in DC power transmission, in order to improve power transmission efficiency,
There is a trend for higher capacity and higher voltage in the future.

FIG. 18 is an assembly diagram showing an example of a conventional thyristor valve, and FIG. 19 is a connection diagram thereof showing one phase out of three phases. In FIGS. 18 and 19, a gantry 20 installed on the floor surface of a building (not shown) is provided with insulating pillars 10 made of GFRP in a tubular shape at respective corners of a rectangle in a plan view (not shown). An upper frame 21 having the same shape as the gantry 20 in a plan view (not shown) is fixed to the upper ends of these insulating columns 10.

Of these, five module mounting plates 10a are fixed to each insulating column 10 at equal intervals. Flange 10b is fixed to the upper end and the lower end of each insulating strut 10, and the upper and lower ends of each insulating strut 10 are fixed to the upper frame 21 and the pedestal 20 via the flange 10b.

Thyristor modules 8 to be described later with reference to FIG. 19 are mounted on the respective module mounting plates 10a via mounting bases 8a, and are fixed to the module mounting plates 10a by bolts.

The pedestal 20 is fixed to the floor of the valve hole in which the thyristor valve is installed by a terrain bolt (not shown). Thyristor module 8 stacked vertically
Is a connection conductor (not shown), which is connected in series as shown in FIG.

That is, as shown in FIG. 19, the thyristor valves 8 stacked vertically in multiple stages are connected to each other in series by connecting conductors (not shown). Of these, the cathode side of the lowermost thyristor valve 8 is connected to the lower P-side terminal of the thyristor valve, and the anode side of the uppermost thyristor valve 8 passes through the anode reactor 2 and
It is connected to the N-side terminal provided at the top of the thyristor valve.

In the thyristor module 8 shown in FIG.
Four thyristors 1 are connected in series, a snubber resistor 4 and a snubber capacitor 3 connected in series are connected in parallel to each thyristor 8, and a voltage detection circuit 6 connected in series to a voltage dividing resistor. Are connected in parallel.

Further, one side of a light guide 7A made of glass fiber for transmitting the ignition signal of the thyristor 1 is opposed to each thyristor 1, and the voltage detecting circuit 6 is also connected to the voltage detecting circuit 6. One side of the light guide 7B that transmits the signal detected in 1. is placed opposite. The other side of these light guides 7A and 7B is connected to a control device to which a thyristor valve is connected.

By the way, the snubber resistor 4 and the voltage dividing resistor 5
An insulating resin containing an organic substance for fixing and protecting the resistance wire is applied to the outer periphery of the wire wound type resistor used as. Oil may be used for the snubber capacitor 3 for insulation.

[0011]

However, in the thyristor valve having such a structure, an excessive current flows in the snubber resistor 4 or the voltage dividing resistor 5 to cause the snubber resistor 4 or the snubber resistor 4 to operate. When the voltage dividing resistor 5 is overheated, the snubber resistor 4 and the insulating resin applied to the outer circumference of the voltage dividing resistor 5 may be ignited.

If the snubber resistor 4 and the voltage dividing resistor 5 are ignited and the temperature of the adjacent snubber capacitor 3 rises and the insulating oil inside the snubber capacitor ignites, it spreads to the entire thyristor valve. There is a risk.

Therefore, in the conventional thyristor valve, the fire detector is installed under the ceiling of the valve hole in which the thyristor valve is installed.
The distance between the upper end of the thyristor valve and the ceiling is not only 2 m due to insulation but 5 m depending on the voltage, but is blocked by the upper frame 21 provided at the upper end of the thyristor valve, and the timing of ignition detection is delayed. There is a fear.

Therefore, an object of the present invention is to obtain a thyristor valve which can detect the ignition occurring inside the thyristor module at an early stage and prevent the spread of the fire.

[0015]

According to a first aspect of the present invention, there is provided a thyristor valve in which a module in which a resistor and a capacitor are connected to a power conversion element is vertically arranged in multiple stages via insulating struts. Alternatively, an optical fiber that outputs the signal converted by the photoelectric converter connected to the other end of the infrared ray emitted from the resistor or capacitor with one end opposite to the capacitor to the control unit that controls the power conversion element is used. It is characterized in that it is provided.

Further, the thyristor valve of the invention described in claim 2 is characterized in that a wide-angle lens for receiving infrared rays and incident on one end of the optical fiber is provided at one end of the optical fiber.

Further, the thyristor valve of the invention described in claim 3 is characterized in that a reflecting mirror for reflecting the infrared rays emitted from the resistor or the condenser to enter one end of the optical fiber is provided on the upper part of the module. To do.

Further, in the thyristor valve of the invention described in claim 4, an infrared detector for detecting the infrared rays emitted from the resistor or the capacitor and making the detection signal enter one end of the optical fiber is adjacent to the one end of the optical fiber. It is characterized by being set up.

Further, in the thyristor valve of the invention described in claim 5, an infrared detector for detecting infrared rays which are incident on one end of the optical fiber and emitted from the other end of the optical fiber is provided adjacent to the other end of the optical fiber. It is characterized by

In addition, the thyristor valve of the invention described in claim 6 is characterized in that an infrared detector is provided on the lower surface of the mounting base of the module and the lower surface of the upper frame of the thyristor valve.

In addition, the thyristor valve of the invention described in claim 7 is characterized in that an infrared detector is provided above the through hole formed in the mounting base of the module and above the upper frame of the thyristor valve.

The thyristor valve according to the present invention is characterized in that the driving voltage of the infrared detector is supplied by dividing the voltage from the main circuit of the module in which the infrared detector detects infrared rays.

Further, the thyristor bulb of the invention described in claim 9 is characterized in that it is provided with a light emitting diode which is turned on by an infrared detector and makes the emitted light enter one end of the optical fiber.

Further, the thyristor valve of the invention described in claim 10 is characterized in that, as the optical fiber, a multi-branched optical fiber whose receiving side is branched is used.

Further, the thyristor valve of the invention described in claim 11 is characterized in that one end of the optical fiber is supported by an insulating support, and is opposed to a resistor or a capacitor of the module.

[0026]

In the invention described in claim 1, when the resistor or the capacitor of the module is overheated or ignited, the infrared ray radiated by this overheat or ignition is radiated from the other end of the optical fiber which is incident on one side. Is converted into an electric signal by the photoelectric switch, and the operation of the power exchange device to which the electric signal is input to the control unit is stopped.

Further, in the invention described in claim 2,
When the resistor or capacitor of the module overheats or ignites, the infrared light emitted by this overheating or firing is incident on one end of the optical fiber through the wide-angle lens.

Further, in the invention described in claim 3,
When the resistor or the capacitor of the module overheats or ignites, the infrared light emitted by the overheating or ignition is reflected by the reflecting mirror and is incident on one end of the optical fiber.

Further, in the invention described in claim 4,
When the resistor or the capacitor of the module overheats or ignites, infrared rays emitted by the overheating or ignition are detected by an infrared detector, and this detection signal is input to the optical fiber from one end of the optical fiber.

Further, in the invention described in claim 5,
When the resistor or capacitor of the module overheats or ignites, the infrared light emitted by this overheating or ignition is incident on the infrared detector through the optical fiber.

In the invention described in claim 6,
When the resistor or capacitor of the module overheats or ignites, the infrared radiation emitted by this overheating or ignition is detected by the infrared detector provided on the mounting base of the module and the lower surface of the upper frame, and this detection signal is detected by the optical fiber. Is input to the optical fiber from one end.

Further, in the invention described in claim 7,
When the resistor or capacitor of the module overheats or ignites, the infrared ray radiated by this overheating or ignition is detected by the infrared detector provided on the mounting base of the module and the through hole formed on the upper frame, The detection signal is input to the optical fiber from one end of the optical fiber.

In the invention described in claim 8,
When the resistor or capacitor of the module overheats or ignites, the infrared light radiated by this overheating or ignition is detected by an infrared detector supplied with the driving power divided from the main circuit of the module, and this detection signal is The optical fiber is input from one end of the optical fiber.

According to the invention of claim 9,
When the resistor or capacitor of the module overheats or ignites, the infrared ray emitted by this overheat or ignition is detected by the infrared detector that lights the ignition diode with the detection signal of this infrared ray, and it is emitted from the light emitting diode and one end of the optical fiber. The detection signal is input to the control unit by the light incident on.

According to the invention of claim 10,
When the resistor or capacitor of the module overheats or ignites, the infrared light emitted by this overheating or ignition is incident on one end of the multi-branched optical fiber.

Further, in the invention as set forth in claim 11, when the resistor or the capacitor of the module is overheated or ignited, the infrared rays radiated by this overheat or ignition are the end faces of the optical fiber whose one end is supported by the insulating support. Is incident on.

[0037]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the thyristor valve of the present invention will be described below with reference to the drawings. FIG. 1 is a partial perspective view showing a first embodiment of the thyristor valve of the present invention, and is a view corresponding to a partially enlarged detailed view of FIG. 18 shown in the prior art.
Further, FIG. 2 is a connection diagram of the thyristor valve shown in FIG. 1 and is also a diagram corresponding to FIG.

In FIGS. 1 and 2, a point different from FIGS. 18 and 19 shown in the prior art is that a square hole 8b is formed in the central portion of the mounting base 8a of each thyristor module 8. An infrared detector 11 is attached to the upper part of the square hole 8b, and light from a light emitting diode 12 provided in the infrared detector 11 is made incident and is emitted to a phototransistor as a photoelectric converter 14, which is a light guide 13 of an optical fiber wire. The electrical components incorporated in the thyristor module 8 are also shown by the provision of the above. That is, although not shown in FIG. 1, the outer periphery of the mounting base 8a is slightly bent upward, and the ends of this bent portion are watertightly welded to each other.

In each mounting base 8a, a square hole 8b is formed in advance in the center of the front side of each thyristor 1 in FIG. An infrared detector 11 is provided on the upper surface of each of the square holes 8b, and the light guide 13 whose tip is opposed to the right side of the light emitting diode 12 mounted on the right side surface of the infrared detector 11 in FIG. A photoelectric converter housed in a wiring duct (not shown) attached to the right-side insulating column 10 through the right end of each thyristor module 8 and housed in a box installed separately from the control panel of the power converter. Connected to 14.

The infrared detector 11 is also installed in an upper frame (not shown) with respect to the upper frame 21 at the upper end shown in FIG.
It is not provided on the mounting base 8a of the thyristor module 8 corresponding to the lower thyristor module shown in FIG. Further, a rectangular glass is inserted into each square hole 8b through a packing.

In FIG. 1, behind each thyristor 1, as will be described later with reference to FIG. 11, a snubber resistor 4 and a voltage dividing resistor 5 are attached to a mounting plate (not shown), and these snubber resistors 4 and A snubber capacitor 3 is attached further behind the piezoresistor 5. An anode reactor 2 is fixed on the right side of the thyristor 1, the snubber capacitor 3, the snubber resistor 4 and the voltage dividing resistor 5.

Further, as shown in the connection portion of the thyristor valve 9 in FIG. 2, the power source for dividing the voltage across both ends of the voltage dividing resistors 5 and the cathode side of the voltage detecting circuit 6 is provided on the anode side and the cathode side of the voltage detecting circuit 6, respectively. The circuit 16 is connected, and the output side of the power supply circuit 16 is connected to the input side of the infrared detector 11 described above.

In the thyristor valve in which each thyristor module 8 is constructed and the photoelectric converters are connected in this way, if the snubber resistor 4 overheats and the insulating resin around the snubber resistor 4 ignites. The infrared ray radiated by this ignition is an infrared detector 11 mounted on the mounting base 8a of the thyristor module 8 in the upper stage of the thyristor module 8 in which the snubber resistor 4 which ignited is incorporated.
Detected in.

Then, the light emitting diode 12 incorporated in the infrared detector 11 is turned on, and the light emitting diode 12 is turned on.
At the end of the light guide 13 opposite to the light emitting diode 12
Light enters, passes through the light guide 13, is emitted to the photoelectric converter 14, and is converted into an electric signal.

The alarm circuit installed inside the box to which this signal is input turns on the alarm bell installed in the above-mentioned box, and the power exchange device to which this signal is input is the thyristor valve thyristor. Turn off and disconnect the main circuit of the thyristor valve from the power supply side.

In the above embodiment, the infrared detector 11
As the power supply for the above, the voltage of the thyristor 1 of each thyristor module 8 is divided and applied, but it may be supplied from a low voltage power supply of the power conversion device through an insulation transformer.

Next, FIG. 3 is a partially enlarged detailed perspective view showing a second embodiment of the thyristor valve of the present invention and is a view corresponding to FIG. 3 is different from FIG. 1 in that three infrared detectors 11 for detecting the ignition of the internal parts of the thyristor module 8 are provided.
Three light guides 13 for transmitting the ignition signal detected at 11 to the photoelectric converter 14 are also provided from each module 8.
Further, these square holes 8b are the upper frame of the upper end shown in FIG.
It is also installed on an upper frame (not shown) corresponding to 21, and is not provided on the mounting base 8a of the thyristor module at the lower end.

In this case, even when the ignition points of the snubber resistor 4 and the voltage dividing resistor 5 are on the opposite side of the snubber resistor 4 and the voltage dividing resistor 5 from the thyristor 1, FIG. In, since the infrared detectors 11 located at the left end and the right end can be detected early and surely, the damage of the accident can be further reduced.

FIG. 4 shows a third thyristor valve according to the present invention.
FIG. 19 is a diagram showing an example of FIG. 18 and a diagram corresponding to FIG. 18 shown in the conventional technique. 4 is different from FIG. 1 in the mounting position of the infrared detector 11, and is otherwise the same as in FIG. That is, the infrared detector 11 is attached to the lower surface of the central portion of each mounting base 8a excluding the mounting base of the thyristor module at the lower end and the central lower surface of the upper frame 21. In this case, there is an advantage that the mounting base 8a does not require processing of the square hole 8b shown in FIGS. 1 and 3 and insertion of packing or glass.

FIG. 5 shows a fourth thyristor valve of the present invention.
It is a figure which shows the Example of this, and is a figure corresponding to FIG. 5 is different from the thyristor valve shown in FIG. 3 in that the tip of the light guide 13 disposed on the lower surface of the mounting base 8a and the upper frame 21 is curved downward, and the snubber is bent against the curved lower end. Infrared rays that have entered from resistors, etc., are directly entered.

In the thyristor valve thus constructed, the infrared detector 11 is housed in a separate box to eliminate the need for attachment to each thyristor module, which simplifies the structure of the thyristor valve. There are advantages.

FIG. 6 shows a fifth thyristor valve of the present invention.
FIG. 6 is a partially enlarged detailed perspective view showing the embodiment of FIG. 6 is different from FIG. 5 in that the route of the light guide 13 is the upper surface of each mounting base 8a, and therefore each mounting base 8a is formed with a square hole 8c.

Also in this case, by mounting the infrared detector 11 in a separate box, it is possible to omit the mounting to each thyristor module 8, and there is an advantage that the structure of each thyristor module becomes simple. .

FIG. 7 shows a sixth thyristor valve of the present invention.
FIG. 3 is a partially enlarged detailed perspective view showing the embodiment of FIG.
A case where three infrared detectors 11 are attached to the lower surface of the attachment base 8a as in FIG. 4 is shown. The hole through which the tip of the light guide 13 penetrates is a circular hole 8d.

In this case, as in the case of the thyristor valve shown in FIG. 3, ignition can be detected early, and
Since the diameter of the through hole 8d can be made small, there is also an advantage that the sealing structure of the circular hole 8d formed in the mounting base 8a is easier than that of the thyristor valve shown in FIG.

FIG. 8 shows a seventh thyristor valve of the present invention.
It is a figure which shows the Example of this, and is a figure corresponding to FIG. 8 is different from the thyristor valve shown in FIG. 4 in that the light guide 13 for each thyristor module 8 is different.
The wide-angle lens 15 is attached to the lower surface of the infrared detector 11 and the upper surface of the arrangement surface of the infrared detector 11.

In the thyristor valve thus constructed, the light ignited at the end of the thyristor module 8 is also detected by the wide-angle lens 15, and this light is converged and incident on the infrared detector 11. Then, in FIG. 3 and FIG.
Like the thyristor valve shown by, the ignition of the snubber resistor or the like can be detected early and reliably without increasing the number of infrared detectors 11.

FIG. 9 shows an eighth thyristor valve of the present invention.
It is a figure which shows the Example of this, and is a figure corresponding to FIG. 9 is different from FIG. 8 in that the light detected and converged by the wide-angle lens 15 shown in FIG. 8 is directly incident on the end face of the light guide 13. Therefore, the tip of the light guide 13 is bent downward, and the infrared detector 11 is housed in a box separately provided like the thyristor valve shown in FIG.

FIG. 10 shows a ninth thyristor valve of the present invention.
FIG. 8 is a partially enlarged detailed perspective view showing an embodiment of the above, corresponding to FIGS. 1, 3 and 7. In FIG. 10, what is different from FIGS. 1, 3 and 7 is the arrangement structure of the light guide 13.
It is not arranged on the mounting base 8a of each thyristor module 8.

That is, the light guide 13 whose one side is placed opposite to the infrared detector 11 housed in the box (not shown) is housed in the duct (not shown) attached to the insulating pillar 10 on the right side, and the insulating pillar 10 is attached. At the position of the upper end of each thyristor module 8 that rises, the thyristor module 8 is bent at a bending radius of a predetermined curvature in the direction of the snubber resistor 4 and the voltage dividing resistor 5.

In the thyristor valve thus constructed, when replacing the thyristor module 8 at the time of maintenance / inspection, it is not necessary to remove the light guide arranged with respect to the mounting base 8a. There is an advantage that it becomes easy. The wide-angle lens 15 shown in FIGS. 8 and 9 may be attached to the incident surface of the light guide 13 to increase the amount of infrared light incident on the light guide 13.

Next, FIG. 11 is a partial detailed view showing a tenth embodiment of the thyristor valve of the present invention, showing only detection products such as an infrared detector and a light guide. Is omitted.

In FIG. 11, the tip of the light guide 13 disposed on the mounting base 8a of the thyristor module 8 is
It is activated between the thyristor 1 and the snubber resistor and the voltage dividing resistor 5.

On the left side of the upper surface of the mounting base 8a,
A pair of insulators 17 are shown, and a snubber unit plate 18 on which the snubber resistor 4, the voltage dividing resistor 5 and the snubber capacitor 3 are placed is shown on the upper surface of these insulators 17. The snubber resistor 4 and the voltage dividing resistor 5 are
It is insulated from the mounting base 8a by an insulator 17. Further, the number and arrangement of the thyristor module products shown in FIGS. 1 to 10 are all the same, and are the same as the insulating structure of the snubber circuit component shown in FIG.

In the thyristor valve thus constructed, the infrared detector 11 is installed close to the snubber resistor 4 and the voltage dividing resistor 5 which are the objects to be ignited, so that the overheat stage before the ignition occurs. Since infrared rays emitted by can be detected, it is possible to prevent an accident from occurring.

FIG. 12 shows the eleventh embodiment of the thyristor valve of the present invention.
FIG. 12 is a partial detailed view showing the embodiment of FIG. 11, corresponding to FIG. 11. In FIG. 12, what is different from FIG. 11 is an infrared detector.
At the position of 11, it is opposed to the side surface of the snubber capacitor 3. In this case, overheat or ignition of the snubber capacitor 3 can be detected early and surely to prevent the accident from spreading. It should be noted that the infrared detector 11 may be placed opposite to the side surface of the snubber capacitor 3 with respect to the thyristor valve shown in FIG.

Next, FIG. 13 is a partial detailed view showing a twelfth embodiment of the thyristor valve of the present invention, showing only the light guide. This light guide 13A is, for example, in place of the light guide 13 arranged between the photoelectric converter 14 and each infrared detector 11 in the thyristor valve shown in FIG.
The case where a multi-branch light guide 13A that branches into a plurality of parts in the middle part is adopted is shown.

In this case, even if the number of infrared detectors 11 is increased, it is not necessary to increase the size of the duct attached to the insulating column 10, and the work of inserting the light guide into this duct can be performed. Labor can be reduced.

FIG. 14 is a partial detailed view showing the thirteenth embodiment of the thyristor valve of the present invention, showing the construction of only the detecting portion. In FIG. 14, in order to detect the ignition of the thyristor module 8, a reflecting mirror 1 is adopted above each thyristor module 8.

In this case, as shown by the broken line in FIG.
With respect to the ignition occurring anywhere in the thyristor module 8, the light incident on the reflecting mirror is made incident on the tip of the light guide 13 so that a photoelectric conversion device in a box not shown passes through the infrared detector 11. Convert to electrical signal.

Further, FIG. 15 is a partial detailed view showing a fourteenth embodiment of the thyristor valve of the present invention and is a view corresponding to FIG. 6. In the thyristor bulb shown in FIG. 15, the light guide 13 is directly opposed to the object to be detected, and the infrared light emitted from the object to be detected is directly incident on the end surface. In this case, the ignition is detected by bringing the tip of the light guide 13 close to the ignition part.

Further, FIG. 17 is a partial detailed view showing the thyristor valve of the present invention, and is a view corresponding to FIG. 13. Figure 17
13 is the same as FIG. 13 in using the multi-branch light guide 13A shown in FIG. 13, but without using the infrared detector 13 and the light emitting diode 12 shown in FIG.
As shown in FIGS. 15 and 16, the tip of the multi-branching light guide 13A is placed opposite to the ignition point of the light emitting object.

[0073]

As described above, according to the invention of claim 1,
In a thyristor valve in which a module in which a resistor and a capacitor are connected to a power conversion element is installed in multiple stages up and down via insulating columns, one end is placed opposite the resistor or capacitor and the infrared light emitted from the resistor or capacitor is one end. By disposing an optical fiber that outputs a signal converted by a photoelectric converter connected to the other end to the control unit that controls the power conversion element, when the resistor or the capacitor of the module overheats or ignites, The infrared light emitted by this overheating or ignition is converted into an electric signal by the photoelectric switch from the infrared light emitted from the other end of the optical fiber which is incident on one side, and the control unit to which this electric signal is input controls the power exchange device. Since the operation can be stopped, a thyristor module that can detect the ignition inside the thyristor module at the beginning and prevent the fire from spreading. Tabarubu can be obtained.

According to the second aspect of the present invention, by providing a wide-angle lens for receiving infrared rays and entering one end of the optical fiber at one end of the optical fiber, when the resistor or the capacitor of the module overheats or fires. Since the infrared rays emitted by this overheating or ignition are incident on one end of the optical fiber through the wide-angle lens, the ignition occurring inside the thyristor module can be detected at the initial stage and the expansion of the fire can be prevented. Can be obtained.

According to the third aspect of the present invention, the resistance of the module is improved by providing a reflecting mirror on the upper part of the module, which reflects the infrared rays emitted from the resistor or the condenser and makes it enter one end of the optical fiber. When the container or the capacitor overheats or ignites, the infrared rays radiated by this overheating or ignition are reflected by the reflecting mirror and made to enter one end of the optical fiber, so that the ignition occurring inside the thyristor module is detected at the beginning, It is possible to obtain a thyristor valve that can prevent the spread of fire.

Further, according to the invention described in claim 4, an infrared detector for detecting infrared rays emitted from the resistor or the capacitor and for making the detection signal enter one end of the optical fiber is provided adjacent to the one end of the optical fiber. When the resistor or capacitor of the module overheats or ignites, the infrared ray emitted by this overheat or ignition is detected by the infrared detector, and this detection signal is input to the optical fiber from one end of the optical fiber. It is possible to obtain a thyristor valve capable of preventing the spread of fire by initially detecting the ignition that has occurred inside the module.

According to the invention described in claim 5, an infrared detector for detecting infrared rays which are incident on one end of the optical fiber and emitted from the other end of the optical fiber is provided adjacent to the other end of the optical fiber. When the resistor or capacitor of the module overheats or ignites, the infrared light emitted by this overheating or ignition is incident on the infrared detector through the optical fiber, so the ignition occurring inside the thyristor module is detected at the beginning. As a result, a thyristor valve that can prevent the spread of fire can be obtained.

Further, according to the invention described in claim 6, by providing the infrared detectors on the lower surface of the mounting base of the module and the lower surface of the upper frame of the thyristor valve, when the resistor or the capacitor of the module is overheated or fired. The infrared rays radiated by this overheating or ignition are detected by the infrared detector provided on the mounting base of the module and the lower surface of the upper frame, and this detection signal is input to the optical fiber from one end of the optical fiber. It is possible to obtain a thyristor valve capable of preventing the spread of a fire by initially detecting the ignition that has occurred inside.

According to the invention described in claim 7, an infrared detector is provided on the upper part of the through hole formed in the mounting base of the module and the upper part of the upper frame of the thyristor valve. When the capacitor overheats or ignites, the infrared radiation emitted by this overheating or ignition is detected by the infrared detector provided above the through hole formed in the module mounting base and upper frame, and this detection signal is detected by the optical fiber. Since the light is input to the optical fiber from one end, it is possible to obtain a thyristor valve capable of detecting the ignition generated inside the thyristor module in the initial stage and preventing the spread of the fire.

In the invention described in claim 8,
When infrared rays are detected by the infrared detector, by dividing the voltage from the main circuit of the module and supplying power for driving the infrared detector, if the resistor or capacitor of the module overheats or ignites, it is emitted by this overheating or ignition. Infrared rays are detected by the infrared detector supplied by dividing the driving power from the main circuit of the module, and this detection signal is input to the optical fiber from one end of the optical fiber. Therefore, it is possible to obtain a thyristor valve that can prevent the spread of fire.

According to the invention described in claim 9, by providing the light emitting diode which is turned on by the infrared detector and makes the emitted light incident on one end of the optical fiber, the resistor or the capacitor of the module is overheated or ignited. Then, the infrared light emitted by this overheating or ignition is detected by the infrared detector that lights the ignition diode with this infrared detection signal, and the detection signal is controlled by the light emitted from the light emitting diode and incident on one end of the optical fiber. Since it is input to the section, it is possible to obtain a thyristor valve capable of preventing the spread of fire by detecting the ignition occurring inside the thyristor module in the initial stage.

According to the tenth aspect of the present invention, by using a multi-branched optical fiber whose receiving side is branched as the optical fiber, when the resistor or the capacitor of the module overheats or ignites, this overheating or ignition causes Since the radiated infrared rays are incident on one end of the multi-branched optical fiber, it is possible to obtain the thyristor valve capable of preventing the spread of the fire by initially detecting the ignition occurring inside the thyristor module.

Further, according to the invention of claim 11,
When one end of the optical fiber is supported by an insulating strut and is placed in opposition to the resistor or capacitor of the module, when the resistor or capacitor of the module overheats or ignites, one end of the infrared radiation emitted by this overheating or ignition is insulated by the insulating strut. Since it was incident on the end face of the supported optical fiber, the ignition that occurred inside the thyristor module was detected at the beginning,
It is possible to obtain a thyristor valve that can prevent the spread of fire.

[Brief description of drawings]

FIG. 1 is a partial perspective view showing a first embodiment of a thyristor valve of the present invention.

FIG. 2 is a connection diagram showing a first embodiment of the thyristor valve of the present invention.

FIG. 3 is a partial perspective view showing a second embodiment of the thyristor valve of the present invention.

FIG. 4 is a front view showing a third embodiment of the thyristor valve of the present invention.

FIG. 5 is a front view showing a fourth embodiment of the thyristor valve of the present invention.

FIG. 6 is a partial perspective view showing a fifth embodiment of the thyristor valve of the present invention.

FIG. 7 is a partial perspective view showing a sixth embodiment of the thyristor valve of the present invention.

FIG. 8 is a front view showing a seventh embodiment of the thyristor valve of the present invention.

FIG. 9 is a front view showing an eighth embodiment of the thyristor valve of the present invention.

FIG. 10 is a partial perspective view showing a ninth embodiment of the thyristor valve of the present invention.

FIG. 11 is a partial perspective view showing a tenth embodiment of the thyristor valve of the present invention.

FIG. 12 is a partial perspective view showing an eleventh embodiment of the thyristor valve of the present invention.

FIG. 13 is a partial perspective view showing a twelfth embodiment of the thyristor valve of the present invention.

FIG. 14 is a partial detailed view showing a thirteenth embodiment of the thyristor valve of the present invention.

FIG. 15 is a partial detailed view showing a fourteenth embodiment of the thyristor valve of the present invention.

FIG. 16 is a partial detailed view showing a fifteenth embodiment of the thyristor valve of the present invention.

FIG. 17 is a partial detailed view showing a sixteenth embodiment of the thyristor valve of the present invention.

FIG. 18 is a front view showing an example of a conventional thyristor valve.

FIG. 19 is a connection diagram showing an example of a conventional thyristor valve.

[Explanation of symbols]

1 ... Thyristor, 2 ... Anode reactor, 3 ... Snubber capacitor, 4 ... Snubber resistor, 5 ... Voltage dividing resistor, 6 ...
Voltage detection circuit, 7 ... Optical fiber as light guide,
8 ... Thyristor module, 8a ... Mounting base, 8b ...
Square hole, 9 ... Thyristor valve, 10 ... Insulating column, 11 ... Infrared detector, 12 ... Light emitting diode, 13, 13A ... Light guide, 14 ... Photoelectric converter, 15 ... Wide-angle lens, 16 ... Power supply circuit,
17 ... Insulator, 18 ... Mounting plate, 20 ... Stand, 21 ... Upper frame.

Claims (11)

[Claims] 1. A thyristor valve in which a module, in which a resistor and a capacitor are connected to a power conversion element, is provided in multiple stages up and down via insulating columns, wherein one end of the thyristor valve is placed opposite to the resistor or the capacitor. Infrared light emitted from the condenser is incident on the one end and an optical fiber for outputting a signal converted by a photoelectric converter connected to the other end to a control unit for controlling the power conversion element is arranged. Thyristor valve. 2. The thyristor valve according to claim 1, wherein a wide-angle lens that receives the infrared light and enters the one end of the optical fiber is provided at one end of the optical fiber. 3. The reflection mirror according to claim 1, wherein a reflection mirror that reflects the infrared light emitted from the resistor or the condenser and makes the infrared light incident on one end of the optical fiber is provided on an upper portion of the module. Thyristor valve. 4. An infrared detector, which detects the infrared rays emitted from the resistor or the capacitor and inputs the detection signal to one end of the optical fiber, is adjacent to the one end of the optical fiber. Claim 1 to Claim 3
The thyristor valve according to any one of 1. 5. An infrared detector, which detects the infrared light that is incident on one end of the optical fiber and is emitted from the other end of the optical fiber, is adjacent to the other end of the optical fiber. The thyristor valve according to any one of claims 1 to 3. 6. The thyristor valve according to claim 4, wherein the infrared detectors are provided on a lower surface of a mounting base of the module and a lower surface of an upper frame of the thyristor valve. 7. The thyristor valve according to claim 4, wherein the infrared detector is provided in an upper portion of a through hole formed in a mounting base of the module and an upper portion of an upper frame of the thyristor valve. 8. The method according to claim 5, wherein the driving power for the infrared detector is divided and supplied from a main circuit of the module in which infrared rays are detected by the infrared detector. Thyristor valve described in Crab. 9. The infrared detector is provided with a light emitting diode which is turned on by the infrared detector and allows the emitted light to enter one end of the optical fiber. The thyristor valve according to any one of 1. 10. The thyristor valve according to claim 1, wherein the optical fiber is a multi-branched optical fiber whose receiving side is branched. 11. The thyristor valve according to claim 1, wherein one end of the optical fiber is supported by the insulating support column and is opposed to the resistor or the capacitor of the module.