JP2016220318A - Power generation facilities monitoring system, power generation facilities monitoring method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power generation facilities monitoring system, a power generation facilities monitoring method and a program that can be easily introduced.SOLUTION: A power generation facilities monitoring system 1 includes a measurement device 2 and a determination device 3. Power generation facilities 4 as a monitoring target of the power generation facilities monitoring system 1 is configured to convert rotational energy of a rotor 41 into electric energy. The measuring device 2 measures a current waveform of a power supply path 5 through which electric energy generated by the power generating facilities 4 passes. The determination device 3 uses the current waveform measured by the measuring device 2 to determine the presence or absence of abnormality of the rotor 41 in the power generating facilities 4.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention generally relates to a power generation facility monitoring system, a power generation facility monitoring method, and a program, and more specifically, a power generation facility monitoring system and power generation facility monitoring used for monitoring a power generation facility that converts rotational energy of a rotating body into electrical energy. The present invention relates to a method and a program.

  2. Description of the Related Art Conventionally, a power generation facility monitoring system (a wind power generation device state monitoring device) that detects whether there is an abnormality in a power generation facility such as a wind power generation device using a vibration sensor has been proposed (see, for example, Patent Document 1). The wind power generator described in Patent Document 1 has a nacelle installed at the top of a tower and a rotating body (rotor head) to which blades are attached. The rotating body is introduced into the nacelle. The main spindle is connected. The main shaft is coupled to the input shaft of a speed increaser whose generator is connected to the output shaft.

  The power generation facility monitoring system described in Patent Literature 1 includes a vibration sensor that detects mechanical vibration of a main shaft bearing and a vibration sensor that detects mechanical vibration generated in the wind power generator. This power generation equipment monitoring system uses these vibration sensor outputs to monitor bearing abnormalities, a decrease in tower mechanical strength (rigidity), and the like. These vibration sensors are composed of, for example, an acceleration sensor using a piezoelectric element, and are provided in the vicinity of the vibration generation place, that is, in the vicinity of the nacelle or in the vicinity of the nacelle in order to detect mechanical vibration generated in the wind turbine generator. It is done.

JP2015-72006

  However, in the conventional power generation equipment monitoring system as described above, it is necessary to install the vibration sensor in the vicinity of the place where the vibration is generated. Therefore, for example, in the case of a wind power generator, since it is necessary to install a vibration sensor at a high place such as a nacelle, it takes much time to install the vibration sensor, which hinders the introduction of a power generation facility monitoring system. .

  The present invention has been made in view of the above reasons, and an object thereof is to provide a power generation facility monitoring system, a power generation facility monitoring method, and a program that are easy to introduce.

  A power generation facility monitoring system according to a first aspect of the present invention is a measurement device that measures a current waveform of a power supply path through which electrical energy generated by a power generation facility that converts rotational energy of a rotating body into electrical energy passes, And a determination device for determining presence or absence of abnormality of the rotating body in the power generation facility using the current waveform measured by a measuring device.

  A power generation facility monitoring system according to a second aspect is characterized in that, in the first aspect, the determination device is configured to determine presence or absence of the abnormality based on a frequency analysis result of the current waveform. To do.

  The power generation facility monitoring system according to a third aspect is characterized in that, in the second aspect, the determination device is configured to determine the presence or absence of the abnormality based on a harmonic component of the current waveform. To do.

  In any one of the first to third aspects, the power generation facility monitoring system according to a fourth aspect is obtained by the acquisition unit that acquires the waveform data representing the current waveform from the measurement device, and the acquisition unit. And analyzing the waveform data and determining whether there is an abnormality according to a determination condition, and an output unit that outputs a determination result of the analysis unit.

  The power generation facility monitoring system according to a fifth aspect is the power generation equipment monitoring system according to the fourth aspect, wherein the determination device stores a plurality of the waveform data acquired by the acquisition unit, and the plurality of the plurality of waveform data stored in the storage unit And an update unit that updates the determination condition based on waveform data.

  According to a sixth aspect of the power generation facility monitoring system, in the fifth aspect, the determination device includes a first device and a second device that transmit data to each other, and the storage unit is provided in the first device. The analysis unit is provided in the second device.

  A power generation facility monitoring system according to a seventh aspect is the power generation facility monitoring system according to any one of the first to sixth aspects, wherein the power generation facility includes a plurality of generators that convert the rotational energy of the rotating body into electrical energy, and the measuring device includes: , Having a plurality of sensors for measuring the current waveform, the plurality of sensors are provided in one-to-one correspondence with the plurality of generators, the determination device, for each of the plurality of generators, The present invention is characterized in that the presence or absence of the abnormality is determined using the current waveform measured by a corresponding sensor among the plurality of sensors.

  In any one of the first to seventh aspects, the power generation facility monitoring system according to the eighth aspect is configured such that the measurement device periodically outputs the current waveform to the determination device during operation of the power generation facility. It is configured.

  The power generation facility monitoring method of the present invention obtains the current waveform from a measuring device that measures the current waveform of the power supply path through which the electrical energy generated by the power generation facility that converts the rotational energy of the rotating body into electrical energy passes, Using the current waveform, the presence or absence of abnormality of the rotating body in the power generation facility is determined.

  The program of the present invention acquires a current waveform from a measuring device that measures a current waveform of a power supply path through which electric energy generated by a power generation facility that converts rotational energy of a rotating body into electric energy is passed through a computer, The current waveform is used to function as a determination device that determines whether or not the rotating body is abnormal in the power generation facility.

  Since the present invention determines the presence or absence of abnormality of the rotating body without detecting mechanical vibration generated in the power generation facility based on the current waveform of the power supply path, it is different from the case of using the vibration sensor as in the conventional example. In contrast, there is no need to install a measuring device in the vicinity of the place where vibration occurs. Therefore, the power generation facility monitoring system of the present invention has an advantage that introduction is easier than in the conventional example.

It is a block diagram which shows the basic composition of the power generation equipment monitoring system which concerns on embodiment. 2A is a graph showing the frequency spectrum of the current waveform when there is an abnormality, and FIG. 2B is a graph showing the frequency spectrum of the current waveform when there is no abnormality. It is the schematic which shows the example of application of the power generation equipment monitoring system which concerns on embodiment. It is a sequence diagram which shows operation | movement of the power generation equipment monitoring system in the application example shown in FIG.

(1) Outline The power generation equipment monitoring system according to the present embodiment is used for monitoring power generation equipment that converts rotational energy of a rotating body into electric energy. Examples of this type of power generation equipment include wind power generation equipment that rotates a windmill with wind power, hydroelectric power generation equipment that rotates a water turbine for power generation with the power of water, thermal power generation equipment that rotates a turbine with steam and combustion gas, and nuclear power generation There are facilities. In addition, there are geothermal power generation facilities, pumped-storage power generation facilities, wave power generation facilities, etc. In the present embodiment, a power generation facility monitoring system used for monitoring a wind power generation facility is taken as an example of the power generation facility.

  Since this type of power generation equipment has a rotating body, there is a possibility that an abnormality may occur in the rotating body due to, for example, aging deterioration of parts related to rotation of the rotating body such as a shaft, a bearing, and a gear. is there. If the power generation facility continues to operate in a state where there is an abnormality in the rotating body, it may lead to serious damage to the power generation facility due to expansion of damage. Therefore, the power generation facility monitoring system of the present embodiment monitors the state of the power generation facility by determining whether or not the rotating body is abnormal for the power generation facility to be monitored.

  If it is determined by the power generation facility monitoring system that the rotating body is abnormal, the user must take measures such as maintenance (including inspection and repair) of the power generation facility before serious damage occurs to the power generation facility. Can do. In other words, according to this power generation facility monitoring system, the user can detect signs of damage to the power generation facility and take appropriate measures before serious damage occurs to the power generation facility. Can be prevented. The user here is, for example, a business owner who manages and manages power generation facilities, and may be an organization such as a company or an individual.

  As shown in FIG. 1, the power generation facility monitoring system 1 according to the present embodiment includes a measuring device 2 and a determination device 3. The power generation facility (wind power generation facility here) 4 that is a monitoring target of the power generation facility monitoring system 1 is configured to convert the rotational energy of the rotating body 41 into electrical energy. The measuring device 2 measures the current waveform of the power supply path 5 through which the electric energy generated by the power generation facility 4 passes. The determination device 3 determines whether there is an abnormality in the rotating body 41 in the power generation facility 4 using the current waveform measured by the measurement device 2.

  Here, the abnormality of the rotating body 41 includes all abnormalities related to the rotation of the rotating body 41, and is not limited to the abnormality (deformation, breakage, etc.) of the rotating body 41 itself, but is a part related to the rotation of the rotating body 41. For example, abnormalities such as the main shaft 411, the bearing 412, and the speed increaser 413 are also included. A specific example of the abnormality of the rotating body 41 will be described in the column “(2.3) Abnormality of the rotating body” below.

  In short, the power generation facility monitoring system 1 of the present embodiment uses the current waveform measured on the path of electric power (electric energy) generated by the power generation facility 4 to determine whether or not the rotating body 41 is abnormal. That is, since the power generation facility 4 generates electrical energy by the rotation of the rotating body 41, if there is an abnormality in the rotating body 41, some abnormality sign appears in the electrical energy generated by the power generation facility 4. Become. Therefore, the power generation facility monitoring system 1 according to the present embodiment monitors the electric energy output from the power generation facility 4 as a current waveform of the power supply path 5, and detects an abnormality of the rotating body 41 from an abnormality sign appearing in the current waveform. Determine presence or absence. Here, the current waveform of the power supply path 5 means a waveform of a current flowing through the power supply path 5.

  According to this configuration, the power generation facility monitoring system 1 can determine whether there is an abnormality in the rotating body 41 without detecting mechanical vibration generated in the power generation facility 4. In other words, in the power generation facility monitoring system 1 of the present embodiment, whether or not the rotating body 41 is abnormal can be determined based on the current waveform of the power supply path 5.

  Therefore, in the power generation facility monitoring system 1 according to the present embodiment, it is only necessary to install a sensor for measuring the current waveform of the power supply path 5 in the power supply path 5, and the case where a vibration sensor is used as in the conventional example. In contrast, it is not necessary to install the measuring device 2 in the vicinity of the place where the vibration is generated. For example, in the case of wind power generation equipment, a sensor for measuring a current waveform can be installed near the ground, and a vibration sensor is installed at a high place such as in the vicinity (inside) of the nacelle 42 (see FIG. 1). Compared to the example, there is an advantage that the power generation facility monitoring system 1 can be easily introduced. In particular, the power generation facility 4 is usually connected to a power supply path 5 for taking out the electric energy generated by the power generation facility 4. By using the existing power supply path 5, Even in the case of monitoring, the power generation facility monitoring system 1 can be easily introduced.

(2) Details Hereinafter, the power generation facility monitoring system 1 of the present embodiment will be described in detail. However, the power generation facility monitoring system 1 described below is only an example of the present invention, and the present invention is not limited to the following embodiment, and the technology according to the present invention is not limited to this embodiment. Various modifications can be made in accordance with the design and the like as long as they do not deviate from the general idea.

(2.1) Power Generation Facility First, the power generation facility 4 that is a monitoring target of the power generation facility monitoring system 1 of the present embodiment will be described first.

  In the present embodiment, the power generation facility 4 is a propeller-type wind power generation facility including a windmill having a plurality of blades 415 as a rotating body 41 as shown in FIG. In addition to the rotator 41, the power generation facility 4 includes a nacelle 42 that rotatably supports the rotator 41 and a tower 43 that supports the nacelle 42. The nacelle 42 is installed at a high place on the order of several tens of meters above the ground by being attached to the upper end of the tower 43. In the nacelle 42, a bearing 412, a speed increaser 413, a brake device 414, and a generator 44 are provided.

  In the example of FIG. 1, the rotating body 41 has a plurality of blades 415, a hub 416, and a main shaft 411. A plurality (three in this case) of blades 415 are arranged radially around the hub 416 and are connected to the main shaft 411 by the hub 416. The main shaft 411 is rotatably supported by a bearing 412 in the nacelle 42 and is connected to the input shaft of the speed increaser 413. The output shaft of the speed increaser 413 is connected to the generator 44 via the brake device 414. As a result, when the rotating body 41 rotates by receiving wind from the plurality of blades 415, the rotation of the main shaft 411 is increased by the speed increaser 413 and transmitted to the generator 44. The power generation facility 4 converts the rotational energy of the rotating body 41 into electrical energy by the generator 44 and outputs the electrical energy.

  The generator 44 is electrically connected to the grid interconnection facility 6 through a power supply path 5 made of a covered electric wire. The power supply path 5 electrically connects the generator 4 in the nacelle 42 and the grid interconnection facility 6 installed on the ground through the tower 43. As a result, the electric power generated by the power generation facility 4 is sent to the grid interconnection facility 6 through the power supply path 5. In other words, the generator 44 is electrically connected to the “load” of the grid interconnection facility 6 through the power supply path 5.

  In the power generation equipment 4, a wind direction / anemometer for measuring the wind direction and the wind speed is provided in the nacelle 42, and control according to the wind direction and the wind speed is performed. In other words, the power generation facility 4 performs efficient power generation following the wind direction by rotating the nacelle 42 along the horizontal plane in accordance with the wind direction using, for example, a yaw driving device. In addition, the power generation facility 4 controls the output (electric power) of the generator 44 to the rated value by changing the mounting angle (pitch angle) of the blade 415 according to the wind speed.

(2.2) Grid interconnection facility The grid interconnection facility 6 is a facility for linking the power generation facility 4 to the power grid 7. Here, as an example, a DC link system interconnection facility 6 that once outputs the power generation facility 4 to a direct current and outputs it to the power system 7 is illustrated.

  The grid interconnection facility 6 includes an AC-DC converter 61, a storage battery 62, an inverter 63, a transformer 64, and a protection device 65. The AC-DC converter 61 converts AC power generated by the power generation facility 4 into DC and outputs it to the storage battery 62. The inverter 63 converts the direct current output of the storage battery 62 into alternating current and outputs it to the primary winding of the transformer 64. The secondary winding of the transformer 64 is electrically connected to the power system 7 via a protection device 65 including a disconnector. Thereby, the output of the power generation equipment 4 is output to the power system 7 according to the voltage and frequency of the power system 7.

(2.3) Abnormality of Rotating Body In the power generation equipment 4 having the configuration described in the section “(2.1) About the power generation equipment”, there is a possibility that the rotating body 41 may have an abnormality as described below, for example. There is.

  That is, in the power generation facility 4, there is a possibility that an abnormality may occur in the rotating body 41 due to aging deterioration of parts related to the rotation of the rotating body 41. In particular, in a power generation facility in which the rotator 41 rotates using natural energy, such as a wind power generation facility, the direction and magnitude of the force acting on the rotator 41 is likely to change, and thus aging is an inevitable problem. .

  For example, in a wind power generation facility, when a gust of wind blows up (up) from the bottom, a force that inclines the main shaft 411 acts on the rotating body 41 so that the main shaft 411 twists the bearing 412. 412 will be stressed. If such a stress is repeatedly applied to the bearing 412, if the bearing 412 is a rolling bearing, damage due to flaking may occur. The flaking referred to here is peeling or the like generated on the rolling surface or raceway surface due to rolling fatigue.

  When flaking occurs in the bearing 412, the loss generated in the bearing 412 increases, and the power generation efficiency of the power generation facility 4 decreases. In addition, if the power generation equipment 4 continues to operate in such a state, the main shaft 411 tilts and misalignment occurs. For example, the gears of the speed increaser 413 are displaced, and the gears are rubbed. Damage such as chipping or scratching may occur. Such damage can occur not only in the gearbox 413 but also in the brake device 414 and the generator 44.

  In short, when the power generation facility 4 is operated in a state where there is some abnormality in the rotating body 41 (for example, flaking of the bearing 412), not only the power generation efficiency of the power generation facility 4 decreases but also the power generation facility 4 due to the expansion of damage. May lead to serious damage. Therefore, the power generation facility monitoring system 1 of the present embodiment allows the user to recognize the abnormality of the rotating body 41 at an early stage by determining whether the rotating body 41 is abnormal and notifying the user of the determination result.

(2.4) Basic Configuration of Power Generation Facility Monitoring System Next, the basic configuration of the power generation facility monitoring system 1 of the present embodiment will be described with reference to FIG.

  In the present embodiment, the measuring device 2 and the determination device 3 constituting the power generation facility monitoring system 1 are connected to a network 8 such as the Internet, and are configured to be able to communicate with each other. Therefore, the determination device 3 can acquire the current waveform measured by the measurement device 2 via the network 8. The determination device 3 determines the presence / absence of an abnormality of the rotating body 41 in the power generation facility 4 using the current waveform acquired from the measurement device 2. A management server 91 under user management is connected to the network 8. In the present embodiment, the user is a business owner who operates and manages the power generation facility 4 and is an organization such as a company.

  Here, first, the measuring apparatus 2 will be described. The measuring device 2 includes a sensor 21, a first communication unit 22, a second communication unit 23, and a gateway 24.

  The sensor 21 is configured using a current sensor such as a CT (Current Transformer) sensor, for example, measures the current flowing through the power supply path 5 and measures the current waveform. The sensor 21 is electrically connected to the first communication unit 22 and is configured to be able to output waveform data representing the measured current waveform to the first communication unit 22. Although various sensors can be applied as the sensor 21, it is preferable that the sensor 21 has a configuration that can be retrofitted to the power supply path 5 without releasing the connection of the power supply path 5, for example, a clamp type sensor.

  The first communication unit 22 is configured to be able to transmit data to and from the second communication unit 23. Communication between the first communication unit 22 and the second communication unit 23 is realized by wireless communication using a radio wave as a transmission medium, for example, a specific low power radio of 920 [MHz] band. However, the communication method between the first communication unit 22 and the second communication unit 23 is not limited to this example. For example, a mobile phone network (carrier network) such as a 3G (third generation) line provided by a communication carrier. May be used, or may be wired communication.

  The gateway 24 is electrically connected to the second communication unit 23. Further, the gateway 24 has a function of connecting to the Internet as the network 8 through a mobile phone network (carrier network) such as a 3G (third generation) line provided by a communication carrier like a so-called mobile router. . However, the gateway 24 is not limited to this configuration, and may be configured to be connected to the network (Internet) 8 without passing through the mobile phone network.

  With the configuration described above, in the measuring device 2, the current waveform measured by the sensor 21 is transmitted as waveform data to the gateway 24 via the first communication unit 22 and the second communication unit 23. The gateway 24 transmits the acquired waveform data to the determination device 3 via the network 8. The gateway 24 functions as a data logger that stores data (waveform data) acquired (collected) from the sensor 21 via the first communication unit 22 and the second communication unit 23.

  In the present embodiment, the measurement device 2 is configured to periodically output a current waveform to the determination device 3 during operation of the power generation facility 4. During the operation of the power generation equipment 4 here, the rotating body 41 rotates in the power generation equipment 4 so that electric power of a predetermined lower limit value or more is generated. Specifically, the power generation facility 4 has a function of outputting a status signal indicating whether or not the power generation facility 4 is in operation. The measuring device 2 receives this state signal from the power generation facility 4 and outputs a current waveform to the determination device 3 only during a period in which the power generation facility 4 is in operation. Here, the measurement device 2 measures a current waveform at a predetermined measurement cycle (for example, 4 hours), and outputs the current waveform to the determination device 3 if the power generation facility 4 is in operation at the time of measurement start.

  The measurement cycle may be timed by the timer of the sensor 21 or may be timed by the timer of the gateway 24. When measuring the measurement cycle with the timer of the gateway 24, the measurement cycle can be set (changed) remotely by accessing the gateway 24 with the management server 91.

  The operating power of the measuring device 2 may be supplied from the power system 7 or may be supplied from the power generation facility 4.

  Next, the determination device 3 will be described. The determination device 3 includes an acquisition unit 31, an analysis unit 32, an output unit 33, a storage unit 34, and an update unit 35.

  The acquisition unit 31 acquires waveform data representing a current waveform from the measurement device 2. Here, the acquisition unit 31 is configured to acquire waveform data from the gateway 24 of the measurement apparatus 2 via the network 8. The waveform data acquired by the acquisition unit 31 is raw data representing the current waveform itself without being processed except for compression or the like. Here, the current waveform measured by the sensor 21 for a predetermined time (for example, about several tens of seconds to 1 minute) constitutes one waveform data. In the present embodiment, the waveform data is a wav file of about 200 [Kbytes] per phase as an example.

  The analysis unit 32 analyzes the waveform data acquired by the acquisition unit 31 and determines whether there is an abnormality (of the rotating body 41) according to the determination condition. In the present embodiment, the determination device 3 determines the presence / absence of an abnormality (of the rotating body 41) based on the frequency analysis result of the current waveform. Specifically, the analysis unit 32 obtains a frequency spectrum of the current waveform by performing fast Fourier transform (FFT) on the waveform data. And the analysis part 32 analyzes this frequency spectrum, and determines the presence or absence of abnormality according to determination conditions.

  Here, the determination conditions used in the analysis unit 32 include a predetermined fixed condition and a changing condition updated as needed. Whether the analysis unit 32 performs the determination using the fixed condition or the variation condition is arbitrarily set according to an instruction from the user, for example.

  The output unit 33 outputs the determination result of the analysis unit 32. Here, the output unit 33 is configured to transmit the determination result to the management server 91 via the network 8. The determination result output by the output unit 33 is at least data indicating whether or not the rotating body 41 is abnormal, and may include, for example, data indicating an abnormality occurrence location, abnormality level (abnormality level), countermeasures, and the like. . Note that the determination result output here includes presentation of a determination result (display, audio output, printing, etc.) and notification.

  The storage unit 34 stores a plurality of waveform data acquired by the acquisition unit 31. The plurality of waveform data referred to here may be a plurality of waveform data obtained by measuring a plurality of times with one sensor 21 or a plurality of waveform data obtained by measuring with a plurality of sensors 21. It may be. Furthermore, a plurality of waveform data obtained by measuring a plurality of times with a plurality of sensors 21 may be used. The fact that there are a plurality of sensors 21 will be described in the column “(2.6) Application example of power generation facility monitoring system” below.

  The update unit 35 updates the determination condition based on the plurality of waveform data stored in the storage unit 34. That is, the determination condition (variation condition) used in the analysis unit 32 is updated at any time by the update unit 35 based on a plurality of waveform data stored in the storage unit 34. In other words, the algorithm for determination in the analysis unit 32 is automatically generated by machine learning. When a large number of waveform data obtained by measuring a plurality of times by a plurality of sensors 21 is stored in the storage unit 34, the determination condition is automatically set based on the large number of waveform data, so-called big data. Will be updated.

  With the configuration described above, the determination device 3 can determine the presence / absence of abnormality of the rotating body 41 in the power generation facility 4 using the current waveform measured by the measurement device 2, and outputs the determination result to the management server 91. it can. Therefore, in the management server 91, it is possible to present to the user the determination result of whether or not the rotating body 41 is abnormal. As a result, the user can take measures such as maintenance (including inspection and repair) of the power generation facility before serious damage occurs to the power generation facility.

  In addition, since the determination condition (variation condition) used in the analysis unit 32 is automatically updated by the update unit 35, the analysis unit 32 applies the variation condition to improve the determination accuracy in the determination device 3. Improvements can be made. That is, by reflecting a plurality of waveform data obtained in various situations, a more appropriate condition is used as a determination condition. Therefore, a predetermined determination condition such as a fixed condition is used. Compared to the case, the determination accuracy is improved.

(2.5) Determination Operation of Determination Device Next, the operation of the determination device 3 for determining whether or not the rotating body 41 is abnormal will be described in a little more detail.

  Here, it is assumed that the frequency spectrum of the current waveform as shown in FIGS. 2A and 2B is obtained by the fast Fourier transform in the analysis unit 32, for example. 2A and 2B, the horizontal axis represents frequency and the vertical axis represents intensity. FIG. 2A shows a case where there is an abnormality, and FIG. 2B shows a case where there is no abnormality.

  As described above, when an abnormality occurs in the rotating body 41, some change occurs in the current waveform. Therefore, the determination device 3 can determine the presence or absence of an abnormality by detecting this change. Specifically, the analysis unit 32 can determine the presence or absence of abnormality by template matching using a normal frequency spectrum (when there is no abnormality) as shown in FIG. 2B as a template. In this case, the analysis unit 32 compares the actually obtained frequency spectrum with the template, and determines that there is no abnormality if the degree of coincidence is a predetermined value or more, and abnormal if the degree of coincidence is less than the predetermined value. Judge that there is.

  Moreover, the analysis part 32 may extract not only template matching but a feature-value from waveform data or a frequency spectrum, for example, and may determine the presence or absence of abnormality based on this feature-value. As an example, the determination device 3 can also determine the presence / absence of an abnormality (of the rotating body 41) based on the harmonic component of the current waveform. In this case, for example, the analysis unit 32 determines that there is no abnormality if a specific harmonic component is less than a predetermined threshold value, and determines that there is an abnormality if the specific harmonic component is greater than or equal to the threshold value.

  Here, when determining that there is an abnormality, the analysis unit 32 may be configured to evaluate to the level of abnormality (degree of abnormality). That is, for example, by evaluating the abnormality level in 99 stages of 1 to 99, the analysis unit 32 can distinguish and determine a mild abnormality and a severe abnormality. The level of abnormality is determined according to the degree of coincidence between the obtained frequency spectrum and the template.

  The determination device 3 may use the current waveform measured by the measurement device 2 to determine whether the rotating body 41 is abnormal. The determination algorithm given here is merely an example, and a specific determination algorithm can be set as appropriate.

(2.6) Application Example of Power Generation Facility Monitoring System (2.6.1) Configuration Next, a specific application example of the power generation facility monitoring system 1 as described above will be described with reference to FIG.

  In the example of FIG. 3, the determination device 3 includes a first device 11 and a second device 12 that transmit data to each other. The acquisition unit 31, the analysis unit 32, the output unit 33, the storage unit 34, and the update unit 35 that constitute the determination device 3 are distributed in the first device 11 and the second device 12. Here, at least the storage unit 34 is provided in the first device 11, and the analysis unit 32 is provided in the second device 12. The first device 11 is provided with an acquisition unit 31 and an output unit 33 in addition to the storage unit 34. The second device 12 is provided with an update unit 35 in addition to the analysis unit 32.

  Thereby, the 1st apparatus 11 bears the function of accumulation | storage of waveform data and the output (presentation, notification) of a determination result among the functions of the determination apparatus 3. FIG. Further, the first device 11 has a function of managing a user ID (identification) for identifying a user and log data. On the other hand, among the functions of the determination device 3, the second device 12 has a function of analyzing waveform data, determining whether the rotating body 41 is abnormal, and updating a determination condition. That is, the function of the determination device 3 is distributed and implemented in the first device 11 and the second device 12, and the determination device 3 is realized by the cooperation of the first device 11 and the second device 12. .

  In the present embodiment, the first device 11 and the second device 12 are each realized by a cloud (cloud computing). More specifically, the first device 11 is a public cloud installed and constructed in “A country”, and the second device 12 is a private cloud installed and constructed in “B country”. That is, the determination apparatus 3 is realized by a so-called hybrid cloud that combines a public cloud and a private cloud. “Country A” here is the country in which the power generation equipment 4 is installed, and is also the country to which the user belongs. On the other hand, “B country” is a different country from “A country”. In other words, the first device 11 and the second device 12 are installed in different countries, but can communicate with each other through the network 8 made up of the Internet. Here, the first device 11 uses a cloud having a larger storage capacity than the second device 12 because of the relationship including the storage unit 34.

  Further, the first device 11 communicates with the measurement device 2 using unencrypted data, that is, plain text. Similarly, the first device 11 communicates with the second device 12 using plain text. As a result, the first device 11 can be operated even in countries / regions where the use of plaintext is obligated by laws and regulations. Therefore, for example, even if the use of plaintext is obligated in “Country A”, the first device 11 can be operated. However, in countries / regions where communication using encrypted data is allowed, the first apparatus 11 may communicate using data in an encrypted state.

  3, the power generation facility 4 includes a plurality of wind power generators 401, 402, 403,. Each of the plurality of wind turbine generators 401, 402, 403,... 40n has a rotating body 41 and a generator 44, similarly to the power generation equipment 4 described in the section “(2.1) Power generation equipment”. ing. That is, the power generation facility 4 in the example of FIG. 3 has a plurality of generators 44 that convert the energy of the rotating body 41 into electrical energy.

  The plurality of wind turbine generators 401, 402, 403,... 40n constitute a “power generation facility group”. The plurality of wind power generators 401, 402, 403,... 40n constituting the “power generation facility group” are installed at intervals of several tens [m] to several [km], for example.

  Furthermore, the measuring device 2 has a plurality of sensors 211, 212, 213,. Each of the plurality of sensors 211, 212, 213,... 21n measures the current flowing through the power supply path 5 in the same manner as the sensor 21 described in the section “(2.4) Basic configuration of power generation facility monitoring system”. The current waveform is measured.

  Here, the plurality of sensors 211, 212, 213,... 21n are provided in a one-to-one correspondence with the plurality of wind power generators 401, 402, 403,. In other words, the plurality of sensors 211, 212, 213,... 21n are provided in one-to-one correspondence with the plurality of generators 44 (see FIG. 1) of the wind power generators 401, 402, 403,. Yes. That is, the plurality of sensors 211, 212, 213,... 21n are attached to the power supply paths 5 connected to the corresponding wind power generators 401, 402, 403,. The plurality of sensors 211, 212, 213,... 21n constitute a “sensor group”.

  A first communication unit 22 (see FIG. 1) is connected to each of the plurality of sensors 211, 212, 213,. One second communication unit 23 (see FIG. 1) is connected to the gateway 24. As a result, many-to-one communication is possible between the plurality of sensors 211, 212, 213,..., 21n constituting the “sensor group” and the gateway 24.

  Therefore, the waveform data measured by the plurality of sensors 211, 212, 213,... 21n is transferred from the first communication unit 22 connected to each of the plurality of sensors 211, 212, 213,. The data is transmitted and collected in one gateway 24. In this way, the measuring device 2 collects the waveform data measured by the plurality of wind turbine generators 401, 402, 403,.

  Here, identifiers for specifying each of the plurality of wind power generators 401, 402, 403,... 40n are set in advance, and each of the plurality of sensors 211, 212, 213,. The identifier of a wind power generator is matched. Furthermore, in addition to the identifier, each of the plurality of wind power generators 401, 402, 403,... 40n is associated with a user ID of a business owner who performs each operation and management. As a result, the power generation facility monitoring system 1 can present, to the user, information on the presence / absence of abnormality of the wind power generators 401, 402, 403, ... 40n that the user himself manages and manages based on the user ID. It is.

  Here, the determination device (the first device 11 and the second device 12) 3 has, for each of the plurality of generators 44, a current waveform measured by a corresponding sensor among the plurality of sensors 211, 212, 213,. It is comprised so that the presence or absence of abnormality may be determined using. That is, in the present embodiment, the determination device 3 can individually determine the presence or absence of an abnormality in the rotating body 41 for each of the plurality of wind power generators 401, 402, 403,. In this case, the output unit 33 of the determination device 3 specifies the wind power generation device to be determined among the plurality of wind power generation devices 401, 402, 403,. Information (identifier) to be output as a determination result.

  In the example of FIG. 3, a monitor 92 and a portable terminal 93 that can be connected to the management server 91 are provided. The monitor 92 and the portable terminal 93 are under the management of the user, and function as a user interface of the management server 91 by connecting to the management server 91. Therefore, when the management server 91 receives the determination result of the determination device 3, the management server 91 can present the determination result to the user by displaying the determination result on the monitor 92 or the portable terminal 93. Here, not only the determination result of the determination device 3 but also the waveform data stored in the storage unit 34 can be displayed on the monitor 92 and the portable terminal 93. Note that the mobile terminal 93 is an information terminal capable of wireless communication with the management server 91, and is, for example, a smartphone or a tablet terminal.

  In the example of FIG. 3, a maintenance terminal 94 for performing maintenance and management of the determination device (first device 11 and second device 12) 3 is provided. The maintenance terminal 94 is configured to be able to communicate with each of the first device 11 and the second device 12. The maintenance terminal 94 may be connected to the first device 11 and the second device 12 via the network 8, or may be connected to the first device 11 and the second device 12 via a dedicated line. The maintenance terminal 94 is managed by an administrator who operates the power generation facility monitoring system 1, and changes in various settings of the determination device 3 through communication with the determination device (first device 11 and second device 12) 3, Register or change a user (user ID). The maintenance terminal 94 also has a function of confirming the operation state of the determination device 3 such as the determination result of the determination device 3.

(2.6.2) Operation Next, the operation of the power generation facility monitoring system 1 configured as shown in FIG. 3 will be described with reference to FIG.

  In the power generation facility monitoring system 1, the measuring device 2 periodically measures a current waveform, and transmits waveform data representing the current waveform from the gateway 24 to the first device 11 of the determination device 3 via the network 8 ( S1). At this time, the measuring device 2 buffers the current waveform measured by each of the plurality of sensors 211, 212, 213,... 21 n at the gateway 24 and transmits the buffered current waveform to the first device 11. Moreover, the information (identifier) which specifies the wind power generation device of measurement object among the plurality of wind power generation devices 401, 402, 403, ... 40n is added to the waveform data as supplementary data.

  When receiving the waveform data from the gateway 24, the first device 11 accumulates the waveform data in the storage unit 34 (S2). At this time, the 1st apparatus 11 memorize | stores waveform data along a time series for every wind power generator 401,402,403, ... 40n. The waveform data stored in the first device 11 is not automatically deleted and remains in the storage unit 34 until a predetermined operation is performed at the maintenance terminal 94. Further, the first device 11 transmits the waveform data to the second device 12 via the network 8 (S3).

  When the second device 12 receives the waveform data from the first device 11, the analysis unit 32 analyzes the waveform data and determines whether or not the rotating body 41 is abnormal (S4). At this time, the second device 12 temporarily stores the waveform data and the analysis data obtained by the analysis of the waveform data in the storage. Basically, the waveform data on the storage is obtained when the determination result is output. And automatically clear analysis data. However, when the determination result that there is an abnormality is obtained, the second device 12 is used for updating the determination condition by the updating unit 35, and therefore, the waveform data and the analysis data are retained for a certain period without being erased. . That is, among the many data (big data) stored in the first device 11, the data that is a sign of damage to the power generation equipment 4 is stored in the second device 12, so that the determination condition in the update unit 35 is determined. Used to update The second device 12 transmits the determination result to the first device 11 via the network 8 (S4).

  When the first device 11 receives the determination result from the second device 12, the output unit 33 creates an e-mail for outputting the determination result (S6). Here, the 1st apparatus 11 provides the web page showing a determination result as a web server. For this reason, the e-mail includes a URL (Uniform Resource Locator) of a Web page representing the determination result on the Internet. The first device 11 transmits the created electronic mail as a notification mail to the management server 91 via the network 8 (S7).

  When the management server 91 receives the notification mail, the management server 91 transfers the notification mail to the monitor 92 and the portable terminal 93. Accordingly, the user can access the Web page representing the determination result from the URL in the notification mail by operating the monitor 92 and the portable terminal 93. When the user accesses the URL, a request is transmitted from the management server 91 to the first device 11 (S8). As a result, the determination result on the Web page can be browsed by the Web browser function of the monitor 92 or the portable terminal 93. That is, in this case, the management server 91 functions as a proxy server that performs Web access control between the monitor 92 and the portable terminal 93 and the network 8.

(2.7) Failure rate curve In the power generation equipment monitoring system 1 of the present embodiment, aged deterioration that occurs in the rotating body 41 while the power generation equipment 4 is normally used, such as flaking of the bearing 412, is rotated. It is the object of determination as an abnormality of the body 41. For this reason, the power generation facility monitoring system 1 of the present embodiment does not determine that damage that occurs suddenly, such as breakage of the rotating body 41 due to a tornado, is an abnormality of the rotating body 41. This point will be described in detail below.

  In the present embodiment, the analysis unit 32 determines the presence or absence of an abnormality according to a failure rate curve representing a change in failure rate with time of the machine, a so-called bathtub curve. That is, according to the bathtub curve, it is divided into three periods of an initial failure period, an accidental failure period, and a wear failure period depending on the elapsed time from the start of operation. Therefore, the analysis unit 32 is configured to validate the determination result that there is an abnormality only in the initial failure period and the wear failure period, and invalidate the determination result that there is an abnormality in the accidental failure period. Also good. Alternatively, the analysis unit 32 is configured to set a threshold value for determining whether or not there is an abnormality higher in the accidental failure period than in the initial failure period and the wear failure period, so that it is difficult to determine that there is an abnormality. Also good. Note that whether the current state of the power generation equipment 4 corresponds to the initial failure period, the accidental failure period, or the wear failure period is determined by the frequency at which the analysis unit 32 determines that there is an abnormality and the level of the abnormality. It is possible.

(3) Effect According to the power generation facility monitoring system 1 of the present embodiment described above, the electrical energy output from the power generation facility 4 is monitored as a current waveform of the power supply path 5, and an abnormality sign appears in the current waveform. Then, the presence or absence of abnormality of the rotating body 41 is determined. Therefore, when it is determined by the power generation facility monitoring system 1 that the rotating body 41 is abnormal, the user performs maintenance (including inspection and repair) of the power generation facility 4 before serious damage occurs to the power generation facility 4. Measures can be taken. In other words, according to the power generation facility monitoring system 1, the user can detect a sign of damage to the power generation facility 4 and take appropriate measures before the power generation facility 4 is actually seriously damaged. Can be prevented. In other words, since the power generation facility monitoring system 1 predicts damage to the power generation facility 4, the user can systematically maintain and manage the power generation facility 4. As a result, the operation stop of the power generation facility 4 due to serious damage to the power generation facility 4 can be avoided, which contributes to an improvement in the operating rate of the power generation facility 4.

  Moreover, in the power generation facility monitoring system 1, it is possible to determine whether or not the rotating body 41 is abnormal without detecting mechanical vibration generated in the power generation facility 4. In other words, in the power generation facility monitoring system 1 of the present embodiment, whether or not the rotating body 41 is abnormal can be determined based on the current waveform of the power supply path 5.

  Therefore, in the power generation facility monitoring system 1 of the present embodiment, it is only necessary to install the sensor 21 for measuring the current waveform of the power supply path 5 in the power supply path 5, and a case where a vibration sensor is used as in the conventional example. Unlike the above, it is not necessary to install the measuring device 2 in the vicinity of the place where the vibration is generated. For example, in the case of a wind power generation facility, the sensor 21 for measuring a current waveform can be installed near the ground, and the power generation facility is compared with a conventional example in which a vibration sensor is installed at a high place such as near (inside) the nacelle 42. There is an advantage that the introduction of the monitoring system 1 becomes easy. In particular, the power generation facility 4 is usually connected to a power supply path 5 for taking out the electric energy generated by the power generation facility 4. By using the existing power supply path 5, Even in the case of monitoring, the power generation facility monitoring system 1 can be easily introduced. Further, there is an advantage that maintenance of the sensor 21 itself is easy.

  Further, as in the present embodiment, the determination device 3 is preferably configured to determine whether there is an abnormality based on the frequency analysis result of the current waveform. According to this structure, the determination apparatus 3 can determine the presence or absence of abnormality by performing known arithmetic processing such as fast Fourier transform on the current waveform. However, this configuration is not essential for the power generation facility monitoring system 1, and the determination device 3 may determine the presence or absence of abnormality from information other than the frequency analysis result.

  In particular, the determination device 3 is preferably configured to determine whether or not there is an abnormality based on the harmonic component of the current waveform. According to this configuration, since the presence / absence of abnormality is determined from the harmonic component that is likely to be affected by the abnormality of the rotating body 41, the determination accuracy of the presence / absence of abnormality is increased. However, this configuration is not an essential configuration for the power generation facility monitoring system 1, and the determination device 3 may determine the presence or absence of abnormality from components other than the harmonic components.

  Further, as in the present embodiment, the determination device 3 acquires waveform data from the measurement device 2, and analyzes the waveform data acquired by the acquisition unit 31, and determines whether there is an abnormality according to the determination condition. It is preferable to have the analysis part 32 and the output part 33 which outputs a determination result. According to this configuration, it is possible to improve the determination accuracy of the presence or absence of abnormality by changing the determination condition used in the analysis unit 32. However, this configuration is not an essential configuration for the power generation facility monitoring system 1, and at least one of the acquisition unit 31, the analysis unit 32, and the output unit 33 may be omitted, for example.

  In this case, as in the present embodiment, the determination device 3 determines the determination condition based on the storage unit 34 that stores a plurality of waveform data acquired by the acquisition unit 31 and the plurality of waveform data stored in the storage unit 34. It is preferable to further include an update unit 35 for updating. According to this configuration, since the determination condition used in the analysis unit 32 is automatically updated by the update unit 35, it is possible to improve the determination accuracy of whether there is an abnormality. However, this configuration is not an essential configuration for the power generation facility monitoring system 1, and the storage unit 34 and the update unit 35 may be omitted.

  Further, in this case, as in the present embodiment, the determination device 3 includes the first device 11 and the second device 12 that transmit data to each other, and the storage unit 34 is provided in the first device 11, and the update unit 35 is preferably provided in the second device 12. According to this configuration, it is only necessary for the first device 11 including the storage unit 34 to secure a large storage capacity, and the storage capacity of the second device 12 can be reduced. In addition, since a highly confidential program such as a determination condition (determination algorithm) is executed by the second device 12, the security of the second device 12 should be increased, such as using a private cloud for the second device 12. Therefore, dead copy can be prevented. In this case, by using plaintext for the first device 11, the first device 11 can be operated even in countries / regions where the use of plaintext is obligated by laws and regulations.

  Further, as in the present embodiment, the power generation facility 4 includes a plurality of generators 44 that convert the rotational energy of the rotating body 41 into electrical energy, and the measuring device 2 includes sensors (211, 212, 213,... 21n) are preferably included. In this case, the determination device 3 determines the presence / absence of an abnormality for each of the plurality of generators 44 using the current waveform measured by the corresponding sensor 21. According to this configuration, the power generation facility monitoring system 1 includes a plurality of generators 44, that is, a plurality of wind power generators 401, 402, 403,. It is possible to centrally manage the presence or absence of abnormalities. Further, when the determination condition is automatically updated based on the current waveform, there is an advantage that the accuracy of the determination condition is improved as the number of generators 44 to be monitored increases. However, this configuration is not essential for the power generation facility monitoring system 1, and the measuring device 2 may have only one sensor 21 that measures a current waveform.

  Moreover, it is preferable that the measuring device 2 is configured to periodically output a current waveform to the determination device 3 during operation of the power generation facility 4 as in the present embodiment. According to this configuration, since the output of the current waveform from the measurement device 2 to the determination device 3 is not performed while the power generation facility 4 cannot be determined from the current waveform in the first place, the measurement is not performed. A useless increase in communication traffic between the device 2 and the determination device 3 can be suppressed.

(4) Power generation facility monitoring method and program When the power generation facility 4 that converts the rotational energy of the rotating body 41 into electrical energy is monitored, the following power generation facility monitoring method is adopted, so that the dedicated determination device 3 is not used. Can realize the same function as the power generation facility monitoring system 1 of the present embodiment.

  That is, the power generation facility monitoring method acquires a current waveform from the measuring device 2 that measures the current waveform of the power supply path 5 through which the electric energy generated by the power generation facility 4 passes, and uses the current waveform to The abnormality of the rotating body 41 is determined.

  According to this power generation facility monitoring method, the same function as the determination device 3 of the power generation facility monitoring system 1 of the present embodiment can be realized without using the dedicated determination device 3, and the power generation facility monitoring system 1 can be easily introduced. There is an advantage that.

  Further, when the determination device 3 has a computer as a main configuration, the program recorded in the memory of the computer is a program for causing the computer to function as the determination device 3. The determination device 3 here obtains a current waveform from the measuring device 2 that measures the current waveform of the power supply path 5 through which the electric energy generated by the power generation equipment 4 that converts the rotational energy of the rotating body 41 into electric energy passes. To do. Further, the determination device 3 determines an abnormality of the rotating body 41 in the power generation facility 4 using the current waveform.

  According to this program, it is possible to realize a function equivalent to the determination device 3 of the power generation facility monitoring system 1 of the present embodiment without using the dedicated determination device 3, and the power generation facility monitoring system 1 can be easily introduced. There are advantages.

(5) Modification The monitoring target of the power generation facility monitoring system 1 according to the present embodiment may be the power generation facility 4 that converts the rotational energy of the rotating body 41 into electric energy, and is not limited to the wind power generation facility. For example, a hydroelectric power generation facility, a thermal power generation facility, a nuclear power generation facility, a geothermal power generation facility, a pumped storage power generation facility, a wave power generation facility, and the like may be monitored by the power generation facility monitoring system 1.

  Each of the first device 11 and the second device 12 is not limited to the cloud (cloud computing), and may be realized by a computer such as a server, for example. Furthermore, the determination device 3 only needs to include the first device 11 and the second device 12, and the function of the determination device 3 may be distributed to three or more devices. Furthermore, the determination device 3 is not limited to the configuration including the first device 11 and the second device 12, and the function of the determination device may be realized by a single device.

  The assignment of each function of the determination device 3 to the first device 11 and the second device 12 is not limited to the above-described example, and the output unit 33 may be in the second device 12 instead of the first device 11, for example. . In this case, the determination result in the analysis unit 32 is output from the output unit 33 of the second device 12 without being returned to the first device 11.

  Moreover, the measuring device 2 is not limited to the configuration in which the current waveform is periodically output to the determination device 3 during the operation of the power generation facility 4, but also during the operation of the power generation facility 4, that is, during the operation and stop of the power generation facility 4 Both of them may be configured to output a current waveform to the determination device 3. Furthermore, the measurement device 2 is not limited to a configuration that periodically outputs a current waveform, but is configured to receive a measurement request from a user and output the current waveform to the determination device 3 as a response to the measurement request. Also good. In this case, for example, when the user performs a predetermined operation on the mobile terminal 93, a measurement request is transmitted from the management server 91 to the measurement device 2, and the measurement device 2 measures a current waveform using this measurement request as a trigger. And transmitted to the determination device 3.

  Moreover, the measuring device 2 is not limited to a configuration that determines whether or not the power generation facility 4 is in operation based on a state signal output from the power generation facility 4, and may be a configuration that determines, for example, based on the output of the sensor 21. .

  In addition, the power generation facility monitoring system 1 may be configured to determine that the sudden occurrence of damage, such as breakage of the rotating body 41 due to a tornado, is an abnormality of the rotating body 41. In this case, the output unit 33 separately presents the sudden damage and the aging deterioration that occurs in the rotating body 41 while the power generation equipment 4 is normally used, such as flaking of the bearing 412. It is preferable.

DESCRIPTION OF SYMBOLS 1 Power generation equipment monitoring system 11 1st apparatus 12 2nd apparatus 2 Measuring apparatus 21,211,212,213, ... 21n Sensor 3 Determination apparatus 31 Acquisition part 32 Analysis part 33 Output part 34 Storage part 35 Update part 4 Power generation equipment 41 Rotation Body 44 Generator 5 Power supply path

Claims (10)

A measuring device that measures the current waveform of the power supply path through which the electric energy generated by the power generation facility that converts the rotational energy of the rotating body into electric energy passes;
A power generation facility monitoring system comprising: a determination device that determines whether or not the rotating body is abnormal in the power generation facility using the current waveform measured by the measurement device. The power generation facility monitoring system according to claim 1, wherein the determination device is configured to determine the presence or absence of the abnormality based on a frequency analysis result of the current waveform. The power generation facility monitoring system according to claim 2, wherein the determination device is configured to determine the presence or absence of the abnormality based on a harmonic component of the current waveform. The determination device includes:
An acquisition unit for acquiring waveform data representing the current waveform from the measurement device;
Analyzing the waveform data acquired by the acquisition unit, and determining the presence or absence of the abnormality according to a determination condition;
The power generation equipment monitoring system according to claim 1, further comprising: an output unit that outputs a determination result of the analysis unit. The determination device includes:
A storage unit for storing a plurality of the waveform data acquired by the acquisition unit;
The power generation facility monitoring system according to claim 4, further comprising an update unit that updates the determination condition based on the plurality of waveform data stored in the storage unit. The determination device includes a first device and a second device that transmit data to each other,
The storage unit is provided in the first device;
The power generation facility monitoring system according to claim 5, wherein the analysis unit is provided in the second device. The power generation facility has a plurality of generators that convert rotational energy of the rotating body into electrical energy,
The measuring device has a plurality of sensors for measuring the current waveform,
The plurality of sensors are provided in one-to-one correspondence with the plurality of generators,
The determination device is configured to determine the presence / absence of the abnormality using the current waveform measured by a corresponding sensor among the plurality of sensors for each of the plurality of generators. The power generation facility monitoring system according to any one of claims 1 to 6. 8. The measurement device according to claim 1, wherein the measurement device is configured to periodically output the current waveform to the determination device during operation of the power generation facility. Power generation equipment monitoring system. Obtaining the current waveform from a measuring device that measures the current waveform of the power supply path through which the electrical energy generated by the power generation facility that converts the rotational energy of the rotating body into electrical energy passes,
Using the current waveform, it is determined whether or not the rotating body is abnormal in the power generation facility. Computer
Obtaining the current waveform from a measuring device that measures the current waveform of the power supply path through which the electrical energy generated by the power generation facility that converts the rotational energy of the rotating body into electrical energy passes,
The program for functioning as a determination apparatus which determines the presence or absence of abnormality of the said rotary body in the said power generation equipment using the said current waveform.

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