JP2008043115A - Rotating-electric machine and electric power generating system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotating-electric machine which can be operated with high efficiency by controlling the quantity of cooling air necessarily and sufficiently while keeping the soundness by settling the maximum temperature of the rotating-electric machine within a limit value. <P>SOLUTION: This rotating-electric machine has a stator where armature winding is wound on a core, a rotor which is arranged rotatably in the concentric position on the inner diametrical side of the above stator, and a cooling air ventilating means which can adjust the quantity of air. Further, the machine is equipped with a means which measures the ambient temperature; and a means which detects any or plural of armature voltage, an armature current, and a field current. It computes the temperature calculated value within the rotating-electric machine by the measurement of the above ambient temperature, the detected value of the above detection means, and the command of the quantity of cooling air; and decides a new cooling air quantity command by the computation of the temperature within the rotating-electric machine. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rotating electric machine having in-machine cooling ventilation means.

  As an example of a conventional rotating electrical machine having on-machine cooling ventilation means, Japanese Patent Application Laid-Open No. 10-42522 describes a rotating electrical machine that cools by introducing cooling air into the machine by a cooling fan attached to the rotor. . Here, the size of the cooling fan is determined so as to circulate a predetermined cooling air flow rate so that the temperature inside the machine does not exceed the limit value.

  On the other hand, Japanese Patent Application Laid-Open No. 2003-284289 discloses an example of a rotating electrical machine having a control device that performs forced ventilation by a blower and controls the amount of cooling air based on the blower inlet temperature and load current. The cooling air volume control device shown here is based on the temperature at the air inlet or outlet to the rotating electrical machine so that the temperature does not exceed a predetermined value due to the relationship between the air temperature and the required air volume based on actual measurement of the actual machine or the actual machine model. Controls ventilation.

  By the way, in a turbine generator having a long axial length and having a plurality of ventilation sections in the axial direction, the temperature in the machine may vary greatly depending on the axial position. For example, in the generator coil described in Japanese Patent Laid-Open No. 2005-210893, the analysis result of the coil temperature is shown, and it can be seen that there is a difference of close to 80K between the maximum temperature and the minimum temperature.

Japanese Patent Laid-Open No. 10-42522 JP 2003-284289 A JP 2005-210893 A

  In the in-machine cooling by a cooling fan used in a conventional turbine generator or the like, a predetermined cooling air flow rate is constantly circulated so that the temperature inside the apparatus does not exceed the limit value, and the ambient temperature is When the in-machine temperature is low due to low or low load ratio, excess cooling air is circulated to cause extra loss. Here, the atmospheric temperature is a temperature other than the air inlet or outlet outside the generator.

  On the other hand, the conventional cooling air volume control device controls the cooling air volume based on the temperature of the air inlet or outlet to the rotating electrical machine. However, in a large rotating electrical machine having a long axial length and having a plurality of ventilation sections in the axial direction, the temperature in the machine may vary greatly depending on the axial position, and the air volume determined by the temperature at the air inlet or outlet is not necessarily It cannot be guaranteed that the maximum temperature inside the aircraft will not exceed a predetermined value. In the portion where the temperature is much higher than the predetermined value, deterioration of the coil insulation, non-uniform thermal expansion of the coil, etc. may occur, leading to damage of the coil or core. In addition, if the cooling air flow with a margin is set in consideration of the temperature distribution, especially when the temperature range is large, the margin will be increased, resulting in a lot of extra loss.

  In addition, since the specifications differ for each large machine such as a large rotating electric machine, sufficient actual measurement data of the in-machine temperature and the air volume may not be obtained for the actual machine or the actual machine model.

  The problem to be solved by the present invention is to provide a rotating electrical machine that can operate with high efficiency by controlling the amount of cooling air necessary and sufficiently while keeping the maximum temperature of the rotating electrical machine within a limit value and maintaining soundness. .

  One feature of the present invention is that a stator in which an armature winding is wound around an iron core, a rotor in which a field winding is wound, cooling air ventilation means with variable air volume, armature voltage and armature current detection. And an ambient temperature measuring means, and the maximum in-machine temperature is determined in advance based on the relationship between the maximum temperature in the machine calculated by analysis based on the detected armature voltage, armature current, and temperature and the required cooling air volume. This is a rotating electrical machine that controls the cooling air volume so as not to exceed the limit value.

  In the above feature, the armature voltage may be set to a predetermined value regardless of detection.

  In the above feature, the rotor may have a configuration in which a field winding is wound, and a physical quantity to be detected may be a field current instead of or together with an armature voltage and an armature current.

  In the above feature, there may be provided means for calculating the in-machine maximum temperature or the in-machine temperature distribution and the required air volume based on the detected armature voltage, armature current, and ambient temperature.

  In the previous feature, the relationship between one or more of the armature voltage, armature current, field current, and ambient temperature, the maximum temperature in the machine, and the required cooling airflow is tabulated by analysis, and the cooling airflow is calculated by referring to this table. You may control.

  In the above feature, a cooling fan may be provided in the rotor, and the cooling air flow means and the cooling air volume may be shared.

  In addition, another feature of the present invention is that a stator having an armature winding wound around an iron core, a rotor having a field winding wound thereon, a cooling air ventilation means having variable air volume, and a plurality of temperature detections in the machine. Means to calculate the maximum temperature in the machine from the detected temperature and the position of the temperature detection means, and based on the relationship between the maximum temperature in the machine and the required cooling air volume, cooling so that the maximum temperature in the machine does not exceed a predetermined limit value This is a rotating electrical machine that controls the air volume.

  In the above feature, there may be provided means for calculating the in-machine maximum temperature or the in-machine temperature distribution and the necessary air volume from the detected in-machine temperature and the position of the temperature detecting means.

  In the above feature, a storage device storing a plurality of patterns of the load state or the ambient temperature, the maximum temperature in the machine, and the required cooling air volume in advance may be provided, and these patterns may be called at a predetermined time to control the cooling air volume.

  In the above feature, a cooling fan may be provided in the rotor, and the cooling air flow means and the cooling air volume may be shared.

  Another feature of the present invention is a stator in which an armature winding is wound around a stator core, a rotor in which a field winding is wound, and a stator frame that houses the stator and the rotor. A ventilation section divided into a plurality of parts in the axial direction by a partition plate provided between the stator core and the stator frame, a plurality of cooling ventilation means corresponding to the ventilation section, a voltage of the armature, and A current detection means and an ambient temperature measurement means; the maximum internal temperature is determined in advance based on the relationship between the maximum temperature in the machine calculated by analysis based on the detected armature voltage, current, and ambient temperature, and the required cooling air volume. The rotating electrical machine increases the air volume of the cooling ventilation means in the ventilation section having the highest temperature point so as not to exceed the limit value.

  In the above feature, a cooling fan may be provided in the rotor, and the cooling air flow means and the cooling air volume may be shared.

  Another feature of the present invention is a stator in which an armature winding is wound around an iron core, a rotor in which a field winding is wound, cooling air ventilation means with variable air volume, and abnormality detection means for the cooling air ventilation means. And a communication unit with a command room that operates the rotating electrical machine, and when the abnormality detection unit detects an abnormality, a power generation system that notifies the command room of the abnormality is configured.

  In the above feature, when the abnormality detection means detects an abnormality, the abnormality may be notified to the command room of the prime mover.

  Another feature of the present invention is that, in a generator that is provided with cooling air ventilation means with variable air volume, armature current detection means, and ambient temperature measurement means, and that is operated by commanding the voltage of the armature, the armature voltage Based on the relationship between the in-machine maximum temperature calculated by analysis based on the command value, detected armature current, and ambient temperature, and the required cooling air volume, the in-machine maximum temperature should not exceed a predetermined limit value. That is, a power generation system that controls the cooling air volume is configured.

  Furthermore, in these configurations, the temperature test result obtained by operating with no load, the temperature test result obtained by short-circuiting the armature terminal and energizing the armature current, and the mechanical loss temperature test result are used to calculate the maximum temperature or the temperature distribution. Also good.

  In these configurations, an electric blower driven by a variable speed electric motor or an axial fan provided with variable angle blades may be used as the air flow variable means.

  It is possible to provide a rotating electrical machine that can operate with high efficiency by controlling the amount of cooling air necessary and sufficiently while keeping the maximum temperature of the rotating electrical machine within a limit value and maintaining soundness.

  Hereinafter, the best mode for carrying out the present invention will be described based on examples. In the following embodiments, an example of a wound field type generator in which a field winding is wound around a rotor is shown as a rotating electric machine. However, in a generator or an electric motor using a permanent magnet as a field source, It does not matter. Further, it may be an induction generator or an induction motor having a secondary conductor.

  FIG. 1 is a block diagram showing Embodiment 1 of the present invention. The rotating electrical machine 1 is cooled by ventilation in the machine by a cooling ventilation means 2 with variable air volume. Based on the detection values of the armature voltage detection means 3, the armature current detection means 4, and the ambient temperature detection means 5, the calculation means 7 calculates the maximum temperature in the machine, and then the maximum temperature in the machine exceeds a predetermined limit value. Calculate the necessary air volume for not. The air volume control means 6 adjusts the air volume of the cooling ventilation means 2 so that the air volume determined by the required air volume calculation means 7 is obtained. The configuration of this embodiment is effective when the temperature of the armature is predicted to be higher than that of the rotor.

  FIG. 2 shows a process for calculating the maximum temperature and the required air volume, assuming a method of calculating the temperature of each part using the ventilation and heat transfer paths as a network based on the literature method. The process up to the required air volume is roughly divided into two. One is a process of calculating ventilation, which calculates ventilation resistance from the specifications of the rotating electrical machine, and then calculates the refrigerant flow rate q flowing in each part based on the cooling ventilation means air volume.

On the other hand, in the temperature calculation process, first, the loss, that is, the amount of heat generated in the rotating electrical machine is calculated based on the rotating electrical machine specifications, the armature voltage V, the armature current _Ia , and the field current _If .

The loss in the armature, that is, the calorific value Q _S is expressed as the sum of the calorific value Q _c in the armature winding and the calorific value Q _{i in the} iron core, and Q _c and Q _i depend on V and I _a .

Q _S = Q _c (V, I _a ) + Q _i (V, I _a )

Further, the calorific value Q _R on the rotor is represented by the sum of the calorific value Q _f in the calorific value Q _m and the field winding by mechanical loss such as friction, Q _f is dependent on the I _f. Here, when the dimensions and the number of rotations of the rotating electrical machine are determined, Q _m is constant regardless of voltage and current.

Q _R = Q _m + Q _f (I _f )

  The heat generation amount is assigned to the heat generating element as a heat source.

  Next, the heat transfer amount transmitted through each part is calculated based on this heat generation amount and each part air volume calculated in the previous ventilation calculation.

The temperature difference (θ ₁ −θ ₂ ) between two points in the network is represented by the product of the heat transfer amount Q _e and the thermal resistance _RT of each part.

θ ₁ −θ ₂ = R _T Q _e

When the location to be calculated is a heat conduction element, the thermal resistance _RT is proportional to the heat conduction distance δ and inversely proportional to the heat conductivity λ and the heat transfer area A.

  On the other hand, when the calculation object is a heat transfer element, it is inversely proportional to the heat transfer coefficient α and the heat transfer area A.

In the temperature calculation, the temperature of the solid that is the heat generating portion is first obtained, and then the temperature of the fluid that is the refrigerant is obtained. The temperature rise ΔT of the fluid with respect to the heat input from the heat transfer element is proportional to the heat input ΔQ to the fluid element and inversely proportional to the refrigerant flow rate q and the constant pressure specific heat C _{p of the} refrigerant. Here, the flow rate q is obtained by ventilation calculation prior to temperature calculation.

Comparing the calculation result of each part's temperature rise with the previous step, if the difference becomes smaller than a certain value, it is regarded as convergence. In each part, the calculation result of the temperature rise is added to the initial temperature T _a (atmosphere temperature) and passed to the maximum temperature judgment. .

  In the configuration of this embodiment, the armature voltage and the armature current are detected values, and the field current is a predetermined value. If the air volume is increased and the above process is repeated until the in-machine maximum temperature obtained by the calculation becomes the limit value or less, the necessary air volume that satisfies the temperature limit value can be calculated.

As an example, FIG. 10 shows the relationship between the rotating electrical machine output and the required air volume for a certain rotating electrical machine. At this time, when the inside of the rotating electrical machine is cooled using a blower fan with variable air volume as the cooling ventilation means, the relationship between the air volume required for cooling and the shaft power is as shown in FIG. In FIGS. 10 and 12, the required air volume and shaft power are displayed as percentages when the rotating electrical machine output is 100%. For example, the air volume required when the rotating electrical machine is operated at 50% output is about 50% from FIG. 10, and the shaft power required for the blower fan to blow 50% air volume is 20% from FIG. It will be about. In the present invention, since the air volume of the blower fan, which is a cooling means, is made variable and controlled to the required air volume based on the maximum temperature, unnecessary loss can be reduced and highly efficient operation is possible. In this example, about 80% of shaft power can be reduced.

  As another example, FIG. 11 shows the relationship between the atmospheric temperature of a rotating electrical machine and the required air volume. At this time, when the inside of the rotating electrical machine is cooled by using a blower fan with variable air volume as the cooling ventilation means, the relationship between the air volume necessary for cooling and the shaft power is as shown in FIG. In FIGS. 11 and 12, the required air volume and shaft power are expressed as percentages when the atmospheric temperature of the rotating electrical machine is 25 ° C. and 100%. For example, the air volume required when the rotating electrical machine is operated at 0 ° C. with respect to the ambient temperature of 25 ° C. is about 70% from FIG. 11, and the shaft power required at this time is about 40% from FIG. In the present invention, since the air volume of the blower fan, which is a cooling means, is made variable and controlled to the required air volume based on the maximum temperature, unnecessary loss can be reduced and highly efficient operation is possible. In this example, about 60% of shaft power can be reduced.

  Further, if the relationship between the output of the rotating electrical machine and the required air volume, the ambient temperature and the required air volume is set in a table as shown in FIG. 13 in advance, the required air volume can be easily obtained without going through a process such as repeated calculation. it can. It is also conceivable that the necessary air volume is tabulated for each predicted time.

  The above output, the required air volume with respect to the ambient temperature, and the shaft power are examples of a certain rotating electric machine, and the numerical values differ depending on the machine.

  Further, the above configuration assumes a blower driven by a variable speed electric motor as the cooling air ventilation means with variable air volume. That is, the air volume control means controls the rotation speed of the electric motor based on the required air volume. An example of the air volume-pressure characteristic of the blower with respect to the rotation speed of the electric motor is shown in FIG. By controlling the number of revolutions using a variable speed electric motor, the air volume can be controlled without requiring mechanical elements such as baffles.

  In the configuration of the present invention, the required air volume of the cooling ventilation means 2 is determined so that the maximum temperature in the machine does not exceed the limit value according to the calculated value of the maximum temperature in the machine calculated from the detected armature voltage, armature current, and ambient temperature. Since the control is performed, the rotating electrical machine can be operated with high efficiency by reducing unnecessary loss. By determining the required air volume based on the in-machine maximum temperature, it is not necessary to allow a temperature margin even in a rotating electric machine having a long shaft length, and appropriate air volume control is possible.

  In addition, since the maximum temperature is calculated based on the armature voltage, the armature current, and the ambient temperature, it is possible to operate at an optimum efficiency following changes in current and voltage and changes in ambient temperature.

  FIG. 3 is a block diagram showing Embodiment 2 of the present invention. When it is known in advance that there is little fluctuation in the armature voltage, or when the command value of the armature voltage can be used, only the armature current is detected, and the armature voltage uses a predetermined value or command value. To calculate the maximum temperature. That is, as the input data 22 in the calculation process of FIG. 2, the maximum temperature and the necessary air volume are calculated using a predetermined or commanded armature voltage, the detected armature current and the ambient temperature.

  According to the present embodiment, the armature voltage detection means can be omitted and a simple configuration can be achieved.

  FIG. 4 is a block diagram showing Embodiment 3 of the present invention. A field current detecting means 8 for detecting the field current of the rotating electrical machine 1 and an ambient temperature calculating means 5 are provided. Based on the detection values of the field current detecting means 8 and the ambient temperature detecting means 5, the calculating means 7 is provided. Calculates the maximum in-machine temperature, and then calculates the required air volume for the maximum in-machine temperature not exceeding a predetermined limit value. The air volume control means 6 adjusts the air volume of the cooling ventilation means 2 so that the air volume determined by the required air volume calculation means 7 is obtained. That is, using the predetermined armature voltage and armature current, the detected field current and the ambient temperature as the input data 22 in the calculation process of FIG. 2, the maximum temperature and the required air volume are calculated.

  The configuration of this embodiment is effective when the temperature of the field winding is predicted to be higher than that of the armature winding. Loss can be reduced by controlling the air volume so that the temperature of the field winding does not exceed the limit value.

  In this example, the field current and the ambient temperature are detected to calculate the maximum temperature inside the machine. However, if it is difficult to predict which of the field winding or armature winding is hot, Thus, as shown in the first embodiment, the armature voltage and the armature current may be detected to calculate the maximum temperature in the machine.

  FIG. 5 is a block diagram showing Embodiment 4 of the present invention. A plurality of temperature sensors 10 are provided in the rotating electrical machine 1, and the temperature is detected by the temperature detection means 9. The calculating means 7 calculates the in-machine maximum temperature based on the position of the temperature sensor 10 and the detected temperature, and then calculates the necessary air volume for preventing the in-machine maximum temperature from exceeding a predetermined limit value. The air volume control means 6 adjusts the air volume of the cooling ventilation means 2 so that the air volume determined by the calculation means 7 is obtained.

  The process for calculating the maximum temperature is shown in FIG. Using the predetermined armature voltage, armature current, and field current as the input data 22, ventilation calculation and loss calculation are performed in the same manner as in the first embodiment, and the temperature distribution of the armature winding is obtained as shown in FIG. Compare the detected temperature with the calculated temperature. The predetermined armature voltage, armature current, and field current used for the calculation are, for example, a design value, a command value, and the like. In FIG. 6, the lowest detected temperature is used as an initial value for temperature calculation, but a predetermined value such as a design value may be used as the initial value. In the configuration in which the atmospheric temperature can be measured, the atmospheric temperature may be used as the initial value.

  Here, as seen in FIG. 17, there may be a difference between the detected temperature values 24 a to 24 g and the calculated temperature value 25. At this time, if a temperature exceeding the calculated temperature value is detected, the required air volume is determined based on the temperature obtained by adding the temperature difference at the point where the difference 26 between the detected temperature value and the calculated temperature value is the maximum to the entire calculated temperature value. To do. Conversely, when the calculated temperature value exceeds all detected temperature values, the difference at the position of the lowest detected temperature value is subtracted from the calculated value to perform correction.

  Since the maximum temperature is calculated based on the detected temperatures at multiple points, it is possible to accurately estimate the in-flight temperature, which is effective in ensuring soundness and reducing unnecessary air volume.

  When a plurality of temperature detection means can be installed inside and outside the rotating electrical machine, higher accuracy can be achieved by using either or both of the configuration described in the present embodiment and the configurations described in the first and second embodiments. In-flight temperature estimation is possible.

  In addition, when calculating the maximum temperature, using the temperature test result with no-load operation, the temperature test result with the armature terminal short-circuited and energizing the armature current, and the mechanical loss temperature test result are sufficient due to abnormalities in the temperature sensor, etc. Even when accurate temperature data cannot be obtained, the temperature can be estimated by complementing the measurement points.

  Further, in this embodiment, when the detected temperature exceeds a certain value, if the communication room (not shown) notifies the command room, an abnormality can be detected and damage to the rotating electrical machine can be prevented. .

FIG. 7 is a block diagram showing Embodiment 5 of the present invention. A cooling fan 11 is attached to the rotor of the rotating electrical machine 1. The rotating electrical machine 1 is air-cooled in the machine by a cooling fan 11 and cooling air ventilation means 2 with variable air volume. Based on the detection values of the armature voltage detection means 3, the armature current detection means 4, and the ambient temperature detection means 5, the calculation means 7 calculates the maximum temperature in the machine, and then the maximum temperature in the machine exceeds a predetermined limit value. Calculate the necessary air volume for not. The air volume control means 6 adjusts the air volume of the cooling ventilation means 2 so that the air volume determined by the calculation means 7 is obtained.

  The calculation process of the maximum temperature is shown in FIG. When calculating ventilation, add the cooling fan air volume and calculate the air volume. Other processes are the same as those in the first embodiment.

  With the configuration of the present embodiment, even if the cooling ventilation means stops, the cooling fan 11 can ventilate the interior of the machine and reduce the output to continue the operation.

FIG. 9 is a cross-sectional view showing a rotary electric machine according to Embodiment 6 of the present invention. In this embodiment, the rotating electrical machine according to the first embodiment has ventilation sections 13a to 13g divided into a plurality of parts in the axial direction by a partition plate 17 provided between the stator core 15 and the stator frame 16. A plurality of ventilation means 14a to 14g having a variable air volume are installed corresponding to the ventilation section of the rotating electrical machine, and each of the ventilation means 14a to 14g is variable to a different air volume.

  In this case, an example of the armature winding temperature distribution calculated from the armature voltage, the armature current, and the detected value of the ambient temperature is shown as a limit temperature of 1.0 pu, and the temperature is shown below the sectional view. The temperature distribution of the armature winding is calculated by a sufficiently fine division network, and a detailed temperature distribution for each section can be obtained as shown in the figure.

  When the temperature of the ventilation sections 13c and 13e exceeds the limit value as in this example, the air volume of the corresponding ventilation means 14c and 14e is increased.

  With the configuration of this embodiment, by increasing only the ventilation amount of the necessary section, loss due to unnecessary ventilation can be reduced, and high-efficiency rotating electric machine operation is possible.

  Further, in addition to the configuration of the present embodiment, a temperature distribution in the rotating electrical machine can be obtained similarly to the fourth embodiment, and the detected temperature value and the calculated temperature value as shown in FIG. 17 can be compared for each ventilation section. In this case, the calculated temperature value may be corrected for each ventilation section. That is, in FIG. 17, the detected temperature value 24a exceeds the calculated temperature value 25 in the ventilation section a, and this difference is corrected in addition to the calculated value. Conversely, in the ventilation section b, the difference is subtracted from the calculated value. . Thereby, the further precision improvement of the temperature calculation for every ventilation section can be achieved.

  FIG. 15 is a block diagram showing a rotating electrical machine according to Embodiment 7 of the present invention. As an air flow variable cooling ventilation means, instead of the cooling fan 11, an axial flow fan having a variable angle blade attached to the rotor is used. Other configurations are the same as those in the first embodiment. FIG. 16 shows an example of the air volume-pressure characteristics of the blower with respect to the blade angle. By using an axial fan composed of variable angle blades, it is possible to control the air volume without greatly changing the configuration of the rotating electrical machine main body.

  FIG. 18 is a configuration diagram showing a power generation system according to Embodiment 8 of the present invention. The rotating electrical machine 1 is connected to the turbine 27 via a coupling (not shown), rotates the rotor by the power of the turbine, and supplies the generated power to the power system 28. In the command room 30, the turbine and the rotating electrical machine 1 are operated and monitored.

  As in the fourth embodiment, the rotating electrical machine 1 is provided with a plurality of temperature sensors 10 in the machine, and the temperature detecting means 9 detects the temperature. The calculating means 7 calculates the in-machine maximum temperature based on the position of the temperature sensor 10 and the detected temperature, and then calculates the necessary air volume for preventing the in-machine maximum temperature from exceeding a predetermined limit value. The air volume control means 6 adjusts the air volume of the cooling ventilation means 2 so that the air volume determined by the calculation means 7 is obtained.

  Further, the rotating electrical machine 1 is provided with an abnormality detection means 29 for the detected temperature. When the temperature detection means 9 detects a value exceeding a predetermined temperature, the abnormality is notified to the command chamber 30 and the notification is received. The command chamber 30 adjusts the output of the turbine and the rotating electrical machine.

  As described above, according to the present invention, the amount of cooling air is controlled to the required amount based on the maximum temperature or temperature distribution in the rotating electrical machine, so that soundness is ensured without the maximum temperature in the machine exceeding the limit value. Therefore, it is possible to control the amount of cooling air in the machine as necessary and to operate the rotating electric machine with high efficiency.

  In addition, according to the present invention, by providing a means for calculating the maximum temperature in the machine or the temperature distribution in the machine, even in a rotating electrical machine installed in a place where the ambient temperature or the load fluctuates severely, the necessary and sufficient air volume is controlled. It is possible to operate the rotating electrical machine with efficiency.

  Further, according to the present invention, control can be simplified by patterning or tabulating the required air volume with respect to the load and the ambient temperature in advance.

The block diagram which shows Example 1 of this invention. Explanatory drawing which shows an air volume calculation process. The block diagram which shows Example 2 of this invention. The block diagram which shows Example 3 of this invention. The block diagram which shows Example 4 of this invention. Explanatory drawing which shows the air volume calculation process in Example 4 of this invention. The block diagram which shows Example 5 of this invention. Explanatory drawing which shows the air volume calculation process in Example 5 of this invention. Sectional drawing and armature winding temperature which show the rotary electric machine of Example 6 of this invention. The figure which shows the relationship between the output of a rotary electric machine, and required air volume. The figure which shows the relationship between the atmospheric temperature of a rotary electric machine, and required air volume. The figure which shows the relationship between an air volume and fan motive power. The figure which shows an example of the table of the required air volume with respect to a rotary electric machine output and atmospheric temperature. The figure which shows the relationship of the air volume-pressure characteristic with respect to the rotation speed in a variable speed blower. The block diagram which shows Example 7 of this invention. The figure which shows the relationship of the air volume-pressure characteristic with respect to a blade angle in an angle variable fan. The figure which shows an example of the detected temperature value of an armature winding and the calculated temperature value in Example 4 of this invention. The block diagram which shows Example 8 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Rotary electric machine, 2 ... Cooling ventilation means, 3 ... Armature voltage detection means, 4 ... Armature current detection means, 5 ... Atmosphere temperature detection means, 6 ... Air volume control means, 7 ... Necessary air volume calculation means, 8 ... Field Magnetic current detection means, 9 ... in-machine temperature detection means, 10 ... temperature sensor, 11 ... cooling fan, 12 ... rotor,
13a to 13g ... ventilation section, 14a to 14g ... cooling ventilation means corresponding to the ventilation section, 15 ... stator iron core, 16 ... stator frame, 17 ... partition plate, 22 ... input data, 23 ... variable angle blades Axial fan, 24a to 24g ... temperature value at each detection position, 25 ... temperature calculation value, 26 ... difference between temperature detection value and temperature calculation value, 27 ... turbine, 28 ... power system,
29 ... Abnormality detection means, 30 ... Command room.

Claims (15)

In a rotating electrical machine having a stator in which an armature winding is wound around an iron core, a rotor rotatably disposed at a concentric position on the inner diameter side of the stator, and cooling ventilation means capable of adjusting an air volume,
Means for measuring the ambient temperature, and means for detecting one or more of armature voltage, armature current, field current,
Calculate the temperature calculated value in the rotating electrical machine by the measured value of the ambient temperature, the detected value of the detecting means, and the cooling air volume command value,
A new cooling air flow command value is determined based on a temperature calculation value in the rotating electric machine. In claim 1,
A rotating electrical machine characterized by determining a cooling air volume so as not to exceed a predetermined limit temperature. In claim 1,
The rotary electric machine is characterized in that the temperature in the rotary electric machine is a maximum temperature of the rotary electric machine or a temperature distribution in the rotary electric machine. In claim 1,
A rotary electric machine characterized in that a relationship between any one or more of the armature voltage, the armature current, the ambient temperature, and the cooling air volume and the new cooling air volume command value is tabulated. In claim 1,
A rotating electric machine characterized in that the new cooling air flow rate command value is tabulated in advance for each predicted time. In claim 1,
A stator frame that accommodates the stator and the rotor; a ventilation section that is axially divided between the stator frame and the stator; and a plurality of cooling ventilation means corresponding to each of the ventilation sections. And
The rotating electrical machine characterized in that the new cooling air amount command value is determined for each of the plurality of cooling ventilation means corresponding to each ventilation section. In claim 1,
The rotating electrical machine is characterized in that the cooling ventilation means is either a variable speed blower fan, a fan attached to a rotor, or both. In claim 7,
The fan mounted on the rotor can change the angle of the wings. In claim 1,
Having temperature detection means in the rotating electrical machine,
A rotating electrical machine characterized in that the temperature in the rotating electrical machine is calculated by correcting the temperature detected by the temperature detecting means. In claim 1,
Having an anomaly detection means,
When the temperature in the rotating electrical machine exceeds a predetermined value, an abnormality is notified to a command room of the rotating electrical machine. In claim 1,
The rotating electrical machine is a generator, and the generator is connected to a turbine through a coupling. The rotor is rotated by the power of the turbine to generate power and supply power to an electric power system or an energy storage device. A power generation system characterized by that. In claim 1,
A rotating electrical machine characterized by calculating a temperature calculation value in a rotating electrical machine using a predetermined value of voltage or current instead of any one or a plurality of detected values of an armature voltage, an armature current, or a field current. In claim 12,
A rotating electrical machine characterized in that the predetermined value is a design value. In claim 12,
The rotating electrical machine characterized in that the predetermined value is a command value. In a rotating electrical machine having a stator in which an armature winding is wound around an iron core, a rotor rotatably disposed at a concentric position on the inner diameter side of the stator, and cooling ventilation means capable of adjusting an air volume,
Means for detecting the temperature in the rotating electrical machine, and means for detecting any one or more of the armature voltage, the armature current, and the field current,
Calculate the temperature calculation value in the rotating electrical machine by the temperature detected by the temperature detection means, the detection value of the detection means, and the cooling air volume command value,
A new cooling air flow command value is determined based on a temperature calculation value in the rotating electric machine.

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