JPH07101978B2 - Hydrogen pressure regulator for hydrogen-cooled rotating electric machine - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a hydrogen-cooled rotary electric machine, and more particularly to a hydrogen-cooled rotary electric machine in which the hydrogen gas pressure in the machine can be adjusted according to the load variation by using a hydrogen storage alloy. The present invention relates to a pressure adjusting device.

[Technical background of the invention and its problems]

Some rotating electrical machines, such as turbine generators, use hydrogen gas as a cooling medium. In this case, it is necessary to increase the heat capacity of the hydrogen gas inside the machine as the unit capacity of the turbine generator increases, that is, (specific weight) x (specific heat) to improve the cooling effect. Some have a pressure of, for example, 5.2 atm.

However, in recent years, the use of turbine generators has become more frequent and
It may be used at partial load as well as 100% load. During this partial load, there is little electric loss in the generator, and it is not necessary to keep the hydrogen gas pressure at 5.2 atm for cooling. If the hydrogen gas pressure inside the machine is kept at 5.2 atm during partial load, rotor windage loss and fan power will be the same as at 100% load, resulting in reduced generator efficiency. Therefore, in such a case, by reducing the hydrogen gas pressure inside the machine, windage of the rotor and fan power are reduced, and the efficiency of the generator can be improved.

By the way, in the conventional hydrogen-cooled rotating electric machine, the hydrogen gas in the machine is injected by a high-pressure hydrogen gas cylinder. Therefore, in order to adjust the hydrogen gas pressure in the machine according to the fluctuation of the load, the hydrogen gas is discharged from the machine. Or, the method of re-injecting from a high-pressure hydrogen gas cylinder was used. However, in this method, the operations for injecting and releasing hydrogen gas are complicated, and it is necessary to take sufficient safety measures in handling hydrogen gas, and the consumption of hydrogen gas will be enormous. However, there is a problem from the viewpoint of effective use of energy.

Moreover, as a means for solving such a problem, for example,
There is one in which the hydrogen gas pressure inside the turbine generator can be adjusted by a pressure adjusting mechanism according to the fluctuation of the load, as in the invention described in Japanese Patent No. 55-12720.

FIG. 6 shows a hydrogen gas pressure adjusting system in such a conventional hydrogen cooling turbine generator. That is,
In the turbine generator 31 connected to the external load system as shown in FIG. 6, the hydrogen gas filled in the hydrogen gas cylinder 33 can be supplied to the inside 32 of the turbine generator 31 through the pressure regulating valve 34, and As the hydrogen gas pressure control system, a relief hydrogen reserve chamber 36 communicating with the inside of the aircraft via a pressure control valve 35, a piston 37 for adjusting the volume of the reserve chamber 36 to let the hydrogen gas in and out of the aircraft 32 flow, and this piston 37 The magnitude of the load is detected by the outputs of the piston drive mechanism 38 and the turbine generator 31 that drive the engine, and a drive command is given to the piston drive mechanism 38 according to the load fluctuation, and the pressure adjustment valve 35
Is constituted by a load follow-up mechanism 39 which gives an opening / closing command.

Therefore, in the hydrogen gas pressure adjusting system of the turbine generator having such a configuration, the pressure of the hydrogen gas cylinder 33 is normally controlled by the pressure adjusting valve 34 so that the pressure is controlled to be constant, and when the load fluctuates, the load is changed. Drive the piston 37 based on the command from the tracking control mechanism 39 to adjust the volume of the reserve chamber 36 and control the opening degree of the pressure adjustment valve 35 to change the hydrogen gas pressure in the turbine generator 32 to the load fluctuation. It can be adjusted accordingly.

However, in the hydrogen gas pressure adjusting system of such a turbine generator, the volume of the reserve chamber 36 is adjusted by the piston 37 that slides on the peripheral surface of the reserve chamber, so that the volume between the piston 37 and the peripheral surface of the reserve chamber is adjusted. If the seal is not sufficient, the high-pressure hydrogen gas on the side communicating with the inside of the machine may leak to the back side of the piston in the atmospheric state, leading to an explosion.

Therefore, recently, the hydrogen gas pressure inside the machine can be easily adjusted without using the relief hydrogen reserve chamber and the drive device such as a piston for adjusting the volume of the reserve chamber as described above, and the consumption of hydrogen gas can be eliminated. The use of hydrogen storage alloys is being considered.

This hydrogen storage alloy is a combination of metal atoms such as titanium and misch metal, which have the property of absorbing hydrogen very well.When the temperature is lowered or the pressure is raised, hydrogen gas is absorbed and heat is generated. If the temperature is raised or the pressure is lowered, the absorbed hydrogen gas is released and heat is absorbed from the surroundings.Also, the temperature of the alloy itself changes depending on the pressure value of the hydrogen gas sent in, and conversely the temperature of the alloy itself is changed. There is a correlation that the pressure of hydrogen gas generated by is also different.

FIG. 2 shows a characteristic example of a hydrogen storage alloy filled with hydrogen gas in a case. That is, as shown in Fig. 2, when the temperature of the hydrogen storage alloy is kept at 50 ° C, the equilibrium hydrogen gas pressure in the case becomes 5.2 atm, and when this is cooled to 40 ° C, hydrogen is adsorbed and the equilibrium hydrogen gas pressure becomes It will be 4.0 atm. When the temperature of the hydrogen storage alloy is raised again to 50 ° C from this state, the equilibrium hydrogen pressure in the case becomes 5.2 atm.

Therefore, by utilizing such characteristics of the hydrogen storage alloy, the in-machine hydrogen pressure of the hydrogen-cooled turbine generator can be changed according to the load.

In this case, it is conceivable to forcibly change the temperature of the hydrogen storage alloy by a heater and a cooler to control the hydrogen gas pressure in the machine, but it is more convenient if this can be done automatically.

[Object of the Invention]

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to make it possible to inject and discharge hydrogen gas into the interior of a hydrogen-cooled turbine generator while making it stationary without danger of explosion. The hydrogen gas pressure inside the machine can be automatically adjusted safely and efficiently according to the load fluctuation.
Accordingly, it is an object of the present invention to provide a hydrogen pressure adjusting device for a hydrogen-cooled rotary electric machine that can effectively use energy.

[Outline of Invention]

In order to achieve the above object, the present invention relates to a rotating electric machine in which a cooling water circulation system is connected to a stator winding formed by filling a hydrogen gas as a cooling medium into a machine and forming a cooling water flow-in / out hollow conductor. Connecting a case containing a hydrogen storage alloy that releases or adsorbs hydrogen gas depending on temperature changes so that hydrogen gas can flow in and out of a hydrogen gas circulation system in the machine, and a cooling water flow passage formed in the case and the rotating electric machine. And a cooling water circulation system for cooling the stator winding by circulating cooling water from a cooling water supply device to the stator winding of the stator winding to the cooling water flow passage from the cooling water outlet side of the stator winding. A part of the cooling water returning to the water supply device is caused to flow in and out to cool or heat the hydrogen storage alloy so that the internal hydrogen gas pressure is automatically adjusted according to the load fluctuation.

Therefore, in the hydrogen pressure adjusting device for a hydrogen-cooled rotary electric machine according to the present invention configured as described above, the cooling water temperature fluctuates according to the load of the rotary electric machine, and therefore the loss heat generated by the rotary electric machine itself is lost. By cooling or heating the hydrogen storage alloy as the drive source for the intake and exhaust of hydrogen gas by the hydrogen storage alloy, it becomes possible to automatically adjust the hydrogen gas pressure inside the aircraft according to load fluctuations. A self-regulating action of automatically determining the hydrogen gas pressure of is obtained.

Example of Invention

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of the configuration of a hydrogen pressure adjusting device for a hydrogen-cooled rotary electric machine according to the present invention. In FIG. 1, 1 is a rotating electric machine, for example, a stator frame of a turbine generator,
A stator core 3 having a stator winding 2 made of a hollow conductor through which cooling water can flow in and out is attached to the inner peripheral surface thereof, and a gas ventilation space 4 is formed in the back portion thereof. Reference numeral 5 denotes a rotor supported by bearings, and a self-fan 6 is attached to the rotor 5 for forcibly circulating the hydrogen gas 7 sealed in the machine at a pressure higher than atmospheric pressure. Further, 8a and 8b are headers for passing cooling water through the hollow conductors of the stator winding 2, and a pure water supply device 9 provided outside the machine is installed in these headers 8a and 8b via pipes 10a and 10b. It is connected. The pure water supply device 9 is composed of a tank 11, a pump 12, a cooler 13 and an ion exchange resin (not shown). On the other hand, 14 is a case provided outside the machine, this case 14 has an upper header 15 at approximately the center of the peripheral surface of the cylinder, and a plurality of heat transfer tubes 16 are provided inside the case in the longitudinal direction of the cylinder. The outer space formed along the direction and formed between the heat transfer tubes 16 is filled with a powdery hydrogen storage alloy 17. In such a case 14, a pipe connecting the cooling water outflow side header 8a of the stator winding 2 and the tank 11 of the pure water supply device 9 to one opening of the cylindrical body.
Bypass connecting a pipe 18a connected to the middle of 10a and connecting a pipe 18b for returning the cooling water to the tank 11 of the pure water supply device 9 to the other opening of the cylinder to bypass a part of the cooling water. Forming a path. In addition, the upper header included in case 14
The 15 is provided with a breathable filter 19 for preventing dust and particles from floating or scattering in the machine, and this portion is connected to the gas ventilation space section 4 in the machine through a pipe 20 so as to connect with hydrogen gas. The hydrogen gas released from the storage alloy 17 or adsorbed by the hydrogen storage alloy 17 can be distributed to and from the inside of the aircraft. Incidentally, 21a, 21b, 21c are pipes 18a, 18b forming a cooling water bypass passage connected to the opening portions at both ends of the case 14 and an appropriate portion of a pipe 20 which is a hydrogen gas flow passage connecting the upper header 15 and the inside of the machine. With the valve provided,
These are for preventing the hydrogen gas inside the machine from being released to the atmosphere when the case 14 is removed from the generator side.

In the hydrogen pressure adjusting device of the hydrogen-cooled turbine generator configured as described above, the tank of the pure water supply device 9 outside the device now
Cooling water flows from 11 into the hollow conductor of the stator winding 2 through the pipe 10b and the inflow header 8b, and returns from the outflow header 8a to the tank 11 of the pure water supply device 9 through the pipe 10a. It is assumed that the stator winding 2 is cooled by the above, and the hydrogen storage alloy 17 filled in the case 14 at this time is applied to the load of the rotating electric machine by the cooling water bypassed from the stator winding cooling water circulation system at that time. It shall be adjusted to a temperature corresponding to the allowable hydrogen pressure for cooling. In such a state, when the load of the generator increases, the current flowing through the stator winding 2 increases, and the conductor generates heat proportional to the square of the current. Therefore, the temperature of the cooling water flowing out to the outflow side header 8a through the hollow conductor of the stator winding 2 rises. A part of the temperature-increased cooling water flows from the stator winding cooling water circulation system described above to the case 14
When flowing into the tank 11 of the pure water supply device 9 through the cooling water flow passage therein, the hydrogen storage alloy 17 filled in the case 15 is warmed, and release of hydrogen gas from the hydrogen storage alloy 17 into the machine is promoted. As a result, the pressure of the hydrogen gas circulating in the machine is increased, so that the cooling of the heat generating part in the machine is improved.

On the other hand, when the load of the generator decreases, the current flowing through the stator winding 2 also decreases, so the temperature of the cooling water that flows out to the outflow header 8a through the hollow conductor of the stator winding 2 decreases. A part of the cooling water whose temperature has dropped is passed through the case 14 from the stator winding cooling water circulation system described above to pass the pure water supply device 9
When the hydrogen storage alloy 17 filled in the case 14 is cooled when flowing into the tank 11 of the, the hydrogen gas inside the aircraft is stored in the hydrogen storage alloy 17
Is adsorbed on. As a result, the pressure of the hydrogen gas circulating in the machine is reduced, and the windage on the surface of the rotor 5 and the fan power are reduced, and the efficiency of the generator is improved. In this case, the hydrogen storage alloy 17 filled in the case 14
Since hydrogen gas released from the inside of the machine or adsorbed to the hydrogen storage alloy 17 from the inside of the machine flows through the filter 19 provided in the upper header 15 of the case 14, even if the hydrogen storage alloy 17 is in the powder form, this hydrogen storage alloy 17 is stored. The alloy does not flow into the machine together with the gas flow, and does not adhere to the insulating material to lower the electrical withstand voltage, resulting in high reliability.

As described above, in this embodiment, a plurality of heat transfer tubes 16 are provided inside the case 14 having the upper header 15 at the substantially central portion of the peripheral surface of the cylindrical body.
Are arranged along the longitudinal direction of the cylindrical body and each of these heat transfer tubes
16 A case 14 in which powdered hydrogen storage alloy 17 is filled in an outer space formed between each other is provided outside the machine, and a heat transfer tube 16 provided inside the case 14 is cooled from a stator winding cooling water system of a generator. Water is allowed to flow in and out, and the case 14 is made to communicate with the gas ventilation space inside the machine to change the temperature of the cooling water and the hydrogen storage alloy.
Since hydrogen gas is released from 17 into the machine or hydrogen gas inside the machine is adsorbed to the hydrogen storage alloy, the hydrogen gas pressure inside the machine can be automatically adjusted according to the fluctuation of the load. . In other words, the temperature of the cooling water in the stator windings is sensitive to the load, so the hydrogen gas pressure inside the machine will be adjusted automatically and speedily when the load fluctuates, and the heat generating part inside the machine can be cooled effectively when the load increases. Moreover, when the load is reduced, the windage on the rotor surface and the fan power can be reduced to improve the efficiency of the generator. Also, the hydrogen storage alloy 17 filled in the case 14 is heated by letting cooling water flow in and out from the stator winding cooling water system of the generator,
Since it is cooled, it is not necessary to use a heater or a cooler, and energy can be effectively used. Further, since the filter 19 is provided in the hydrogen gas flow passage of the upper header 15 of the case 14, even if the hydrogen storage alloy 17 is in powder form, its powdery substance is prevented from entering the machine by the gas flow. It is possible and reliable. Further, since the case 14 is provided outside the machine, it can be carried out without stopping the generator when it needs to be replaced, and the maintenance thereof is easy.

In the above embodiment, the case where one set of cases is provided outside the machine has been described. However, when two sets are provided and one of the sets reaches the end of its life, the other set is switched to the other set. May replace the hydrogen storage alloy and use this as a standby.

Next, another embodiment of the present invention will be described.

FIG. 3 shows another example of the configuration of the hydrogen pressure adjusting device for a hydrogen-cooled rotary electric machine. The same parts as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. Here, only different parts will be described. . In this embodiment, as shown in FIG. 3, a pipe for allowing cooling water to flow into one opening of the case 14 from the stator winding cooling water system that connects between the cooling water outflow side header 8a and the tank 11 of the pure water supply device 9. A cooling water reheater 22 is provided in the middle of 18a, and the pipe 10b of the pure water supply device 9 and the cooling water reheater 22 are provided.
A pipe 23 is connected between the pipe 18a on the more upstream side and a part of the cooling water having a low temperature on the outlet side of the cooler 13 is bypassed. Pipes 24a, 24b, and 24c
The valves 23 and 10a and 10b are provided midway.

Here, in describing the operation of the above configuration, first, the pipe 18
The reason for providing the cooling water reheater 22 in the middle of a and bypassing a part of the cooling water having a low temperature on the outlet side of the cooler 13 to the pipe 18a on the upstream side will be described. In Case 14, if the relationship between the temperature of the hydrogen storage alloy 17 filled inside and the hydrogen equilibrium pressure is the same as the cooling water outlet temperature based on the load and the allowable hydrogen gas pressure inside the machine, the cooling water outlet temperature Thus, by heating and cooling the hydrogen storage alloy 17, it is possible to completely adjust the hydrogen gas pressure inside the machine according to the fluctuation of the load without adding heat quantity for cooling and heating from the outside.

However, in reality, there is no hydrogen storage alloy in which the cooling water outlet temperature and the allowable hydrogen gas pressure in the machine completely match. Fig. 4 is a characteristic diagram showing the relationship between the stator winding cooling water outlet temperature and the allowable hydrogen pressure inside the machine, and the hydrogen storage alloy temperature and hydrogen equilibrium pressure. The solid line (A) shows the load and the stator winding cooling water. It shows an example of the characteristics of the stator winding cooling water outlet temperature derived from the relationship between the outlet temperature and the relationship between the load and the allowable hydrogen pressure. The two-dot chain line (a), the dotted line (b), the one-dot chain line (c) and ( d)
Is a characteristic example showing the relationship between temperature and hydrogen equilibrium pressure of different types of hydrogen storage alloys. As can be seen from the characteristic diagram, the characteristic of the solid line A necessary for the operation of the hydrogen-cooled rotating electric machine, that is, the characteristic of the hydrogen storage alloy with respect to the load (cooling water outlet temperature) and the allowable hydrogen pressure inside the aircraft is the two-dot chain line ( There are several cases as shown in a), dotted line (b), alternate long and short dash line (c) and (d). Now, assuming that the adjustment range of hydrogen pressure is between 4.2 and ² Kg / cm ² , the stator winding is always used in the case of the hydrogen storage alloy with the characteristics on the upper right of the solid line (A) as indicated by the chain double-dashed line (a). The outlet cooling water of the above must be further cooled and used, and in the case of the hydrogen storage alloy of the characteristic located at the lower left of the solid line A as indicated by the chain line (c), the outlet cooling water of the stator winding is always heated. Therefore, it is energy-consuming. On the other hand, in the case of the hydrogen storage alloy having the characteristics of the dotted line (b) and the one-dot chain line (d), it intersects with the solid line (A) in the pressure adjustment range, which is advantageous in terms of energy, I can say. However, even if a hydrogen storage alloy having such characteristics is used, it does not match the characteristics indicated by the solid line (A), so that it is actually necessary to finely adjust the temperature of the stator winding cooling water. That is, when using a hydrogen storage alloy having the characteristics shown by the dotted line (b), assuming that the stator winding cooling water outlet temperature is 80 ° C at a load of 100%, the hydrogen equilibrium pressure at that time will be about 5 kg / cm ² . , Required hydrogen pressure at 100% load 4.2Kg /
Since it exceeds cm ² , it is necessary to slightly cool the stator winding cooling water at this point so that it reaches the “X” point in the figure. Also
When the hydrogen storage alloy is heated at the stator winding cooling water outlet temperature of 65 ° C at 75% load, the hydrogen equilibrium pressure becomes approximately 1.00 Kg / cm ² , and at this point the stator winding cooling water is heated to Need to come to the Y "point.

When using a hydrogen storage alloy with the characteristics indicated by the alternate long and short dash line (d), it is the opposite of the characteristics described in (b) above, heating the stator winding cooling water at 100% load, and at 75% load Then, it is necessary to cool the stator winding cooling water to cool the hydrogen storage alloy.

In this way, when heating and cooling the hydrogen storage alloy with the stator winding cooling water, the minimum amount of external heat for fine adjustment of the temperature of the hydrogen storage alloy is adjusted to the temperature of the outlet side of the cooling water reheater 22 and the cooler 13. A part of the low cooling water is bypassed by the pipe 23.

In the hydrogen pressure adjusting device for the hydrogen-cooled turbine generator configured as described above, the stator winding 2 is cooled by the stator winding cooling water circulation system as in the above-described embodiment, and the case 14 is filled at this time. It is assumed that the hydrogen storage alloy 17 thus prepared is adjusted to a temperature corresponding to the allowable hydrogen pressure for cooling the load of the rotating electric machine by the cooling water bypassed from the stator winding cooling water circulation system at that time. In such a state, when the load of the generator increases, the current flowing in the stator winding 2 increases, and heat proportional to the square of the current is generated in the conductor, so that the stator winding 2 The temperature of the cooling water flowing out to the outflow side header 8a through the hollow conductor rises. A part of the cooling water whose temperature has risen flows into the cooling water reheater 22 from the above-described stator winding cooling water circulation system, where the returning cooling water is heated to an appropriate temperature and then pure water is supplied through the case 14. It flows to the tank 11 of the device 9. Therefore,
Since the hydrogen storage alloy 17 filled in the case 14 is warmed by the return cooling water heated by the cooling water reheater 22, the release of hydrogen gas from the hydrogen storage alloy 17 into the machine is promoted. As a result, the pressure of the hydrogen gas circulating inside the machine increases and becomes the allowable hydrogen gas pressure for the load.
The cooling of the heat generating part in the machine is improved. In this case, the cooling water reheater 22 is energized, and the valve 24a provided in the pipe 23 is closed.

On the other hand, when the load of the generator decreases, the current flowing through the stator winding 2 also decreases, so the temperature of the cooling water that flows out to the outflow header 8a through the hollow conductor of the stator winding 2 decreases. A part of the cooling water having the lowered temperature merges with a part of the cooling water having a low temperature on the outlet side of the cooler 13, flows through the case 14 to the tank 11 of the pure water supply device 9, and is filled in the case 14. The hydrogen storage alloy 17 is cooled. Therefore, the hydrogen gas in the machine is adsorbed by the hydrogen storage alloy 17, and the pressure of the hydrogen gas circulating in the machine decreases to the allowable hydrogen gas pressure for the load at that time, so that the windage on the surface of the rotor 5 is reduced. The fan power is reduced and the efficiency of the generator can be improved. In this case, the cooling water reheater 22 is not energized, and the valve 24a provided in the pipe 23 is opened.

As described above, in this embodiment, the pipe 18 for allowing the cooling water to flow from the stator winding cooling water system connecting the cooling water outflow side header 8a and the tank 11 of the pure water supply device 9 to one opening of the case 14 is provided.
A cooling water reheater 22 is provided in the middle of a, and a pipe 10b of the pure water supply device 9 and a pipe 18a upstream of the cooling water reheater 22 are provided.
Since a part of the cooling water having a low temperature on the outlet side of the cooler 13 is bypassed by connecting the pipe 23 with the pipe 23,
When the load increases or decreases, the hydrogen gas pressure inside the machine can be adjusted to the allowable hydrogen gas pressure for the load by fine adjustment with the minimum energy. Also, before the load increases, the cooling water reheater heats the hydrogen storage alloy to raise the in-machine hydrogen pressure to the allowable hydrogen pressure of the load when the load rises, so that the time lag required for pressure adjustment when the load rises. It is possible to adjust the hydrogen pressure inside the machine by eliminating.

In this embodiment, the cooler is used to reduce the temperature of the return cooling water.
Although a part of the cooling water having a low temperature on the outlet side of 13 is bypassed by the pipe 23, as shown in FIG. 5, the pipe 18 for returning the cooling water from the stator winding cooling system to the case 14 flows in.
A cooler 25 may be provided in a in series with the cooling water reheater 22.

In each of the above-mentioned embodiments, the case where the stator winding water cooling system is used as a medium for cooling and heating the hydrogen storage alloy has been described, but the rotor winding is water-cooled through the rotation shaft hole. A water cooling system may be used.

〔The invention's effect〕

As described above, according to the present invention, a rotating electric machine in which a cooling water circulation system is connected to a stator winding formed by filling the interior of a machine with hydrogen gas as a cooling medium and forming a hollow conductor through which cooling water can flow in and out. In, a case containing a hydrogen storage alloy that releases or adsorbs hydrogen gas due to temperature change is connected to the hydrogen gas circulation system in the machine so that hydrogen gas can flow in and out, and the cooling water flow passage formed in the case and the rotation The stator winding of the electric machine is connected to a cooling water circulation system that circulates cooling water from a cooling water supply device to cool the stator winding, and the cooling water flow passage is connected to the cooling water outlet side from the cooling water outlet side of the stator winding. Since a part of the cooling water returning to the cooling water supply device is made to flow in and out to cool or heat the hydrogen storage alloy, a stationary type that does not pose a risk of explosion can be used to inject and discharge hydrogen gas into the machine. What to do Is possible, it is possible to adjust automatically depending flight hydrogen gas pressure to load variation,
It is possible to provide a hydrogen pressure adjusting device for a hydrogen-cooled rotary electric machine, which can obtain a self-adjusting action of automatically determining the hydrogen gas pressure inside the machine and thus can effectively use energy.

[Brief description of drawings]

FIG. 1 is a structural explanatory view showing an embodiment of a hydrogen-cooled rotary electric machine according to the present invention, FIG. 2 is a characteristic diagram of a hydrogen storage alloy used in the same embodiment, and FIG. 3 is another embodiment of the present invention. 4 is a characteristic diagram showing the relationship between the stator winding cooling water outlet temperature and the allowable hydrogen pressure inside the machine and the relationship between the hydrogen storage alloy and the hydrogen equilibrium pressure. FIG. 5 shows another difference of the present invention. FIG. 6 is a configuration diagram showing a main part of the embodiment, and FIG. 6 is a configuration diagram showing a hydrogen pressure adjusting system of a conventional turbine generator. 1 ... Stator frame, 2 ... Stator winding, 3 ... Stator core, 4 ... Space part, 5 ... Rotor, 6 ... Self fan, 7 ... Hydrogen gas, 8a, 8b ... … Header, 9 …… Pure water device, 10a, 10b …… Piping, 11 …… Tank, 12 …… Pump, 1
3 …… cooler, 14 …… case, 15 …… case upper header, 16 …… heat transfer tube, 17 …… hydrogen storage alloy, 18a, 18b…
… Piping, 19 …… Upper header, 20 …… Piping, 21a-21c ……
Valve, 22 …… Cooling water reheater, 23 …… Piping, 24a-24c
…… Valve, 25 …… cooler.

Claims (1)

[Claims] 1. A rotating electric machine in which a cooling water circulation system is connected to a stator winding formed of a hollow conductor capable of filling hydrogen gas as a cooling medium into the machine and allowing cooling water to flow in and out, and hydrogen A case containing a hydrogen storage alloy that releases or adsorbs gas is connected to a hydrogen gas circulation system in the machine so that hydrogen gas can flow in and out, and a cooling water flow passage formed in the case and a stator winding of the rotating electric machine. Is connected to a cooling water circulation system that circulates cooling water from a cooling water supply device to cool the stator winding, and returns to the cooling water supply device from the cooling water outlet side of the stator winding in the cooling water flow passage. Water for a hydrogen-cooled rotating electric machine characterized in that the hydrogen gas pressure in the machine is automatically adjusted according to load fluctuations by flowing in and out a part of cooling water to cool or heat the hydrogen storage alloy. Pressure regulating device.