JP2016205860A - Testing machine for emergency power generator - Google Patents

Testing machine for emergency power generator Download PDF

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JP2016205860A
JP2016205860A JP2015084354A JP2015084354A JP2016205860A JP 2016205860 A JP2016205860 A JP 2016205860A JP 2015084354 A JP2015084354 A JP 2015084354A JP 2015084354 A JP2015084354 A JP 2015084354A JP 2016205860 A JP2016205860 A JP 2016205860A
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emergency generator
temperature
prime mover
sensor
inlet
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JP6502735B2 (en
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文雄 井上
Fumio Inoue
文雄 井上
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文雄 井上
Fumio Inoue
文雄 井上
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Abstract

An emergency generator testing machine capable of performing diagnosis based on an emergency generator test without requiring skill. A load testing unit having a load resistor connected to an emergency generator, a sensor attached to the emergency generator, and a receiving unit for receiving information from the sensor. The sensor 3 includes at least a temperature sensor that measures the temperature of the prime mover 21 included in the emergency generator 2 and a pressure sensor that measures the pressure of the prime mover 21. Based on the information, there is a determination unit that detects an abnormality of the emergency generator 2 and outputs information on the abnormality. [Selection] Figure 1

Description

  The present invention relates to an emergency generator testing machine for performing a load test of an emergency generator.

  Emergency generators are installed in factories, buildings, hospitals, etc., and are activated when a power failure occurs due to a disaster or the like to generate power. For emergency generators, diesel engines are used as prime movers. Emergency generators are not used in normal times, but are used only in emergencies, so regular testing is necessary to ensure reliable operation in an emergency. The test is performed by operating the emergency generator under a predetermined load.

  As a testing machine for testing an emergency generator, one having a load resistor is known. The emergency generator tester is connected to the emergency generator to be tested, and the current from the test subject can be converted into heat by a load resistor. An example of such an emergency generator testing machine is disclosed in Patent Document 1.

Japanese Patent No. 5497234

  In the test of the emergency generator, it is inspected whether each component including the prime mover is operating normally. This inspection has been performed by arranging sensors or the like at various locations of the emergency generator and viewing various data output from the sensors or detecting operating sounds and vibrations. In addition to data acquired during such tests, emergency generators do not test frequently, such as once every six months or once a year. Comparison is also important for grasping the current situation.

  For this reason, skill was required to accurately determine whether or not the emergency generator was operating normally, or that it was normal at the present time, but it was necessary to replace parts nearby. .

  The present invention has been made in view of the above problems, and an object thereof is to provide an emergency generator testing machine capable of performing diagnosis based on an emergency generator test without requiring skill.

In order to solve the above problems, an emergency generator testing machine according to the invention of claim 1 includes a load test unit having a load resistor connected to the emergency generator, and a sensor attached to the emergency generator. An emergency generator testing machine having a receiving unit for receiving information from the sensor,
The sensor includes at least a temperature sensor that measures a temperature in a prime mover of the emergency generator, and a pressure sensor that measures a pressure in the prime mover,
Based on the information from the temperature sensor and the pressure sensor received by the receiving unit, the abnormality detecting unit detects an abnormality of the emergency generator and outputs the information of the abnormality.

  According to the first aspect of the invention, in the emergency generator load test, abnormality detection can be automatically performed based on at least the measured temperature and pressure.

The emergency generator testing machine according to the invention of claim 2 further includes a storage unit for storing information in past tests,
The determination unit compares information acquired from the sensor with information in a past test acquired from the storage unit, and detects an abnormality of the emergency generator based on the comparison result. It is configured.

  According to the second aspect of the invention, it is possible to detect an abnormality from the change over time of the emergency generator, and to reliably detect an abnormality associated with deterioration over time in the emergency generator that is operated less frequently. Can do.

Furthermore, in the emergency generator testing machine according to the invention of claim 3, the temperature sensor measures an intake air temperature sensor that measures at least an intake air temperature of a supercharger included in the prime mover, and measures an outlet exhaust temperature of the prime mover. An exhaust gas temperature sensor, wherein the pressure sensor includes an inlet pressure sensor that measures at least an inlet pressure of the prime mover,
The determination unit is configured such that an intake air temperature fluctuation amount, which is a difference between the intake air temperature acquired by the intake air temperature sensor and the intake air temperature stored in the storage unit, is an outlet exhaust gas temperature of the prime mover acquired by the exhaust gas temperature sensor and the When the engine outlet exhaust temperature fluctuation amount is a difference from the motor outlet exhaust temperature stored in the storage unit, the emergency generator is determined to be normal, and the intake air temperature fluctuation amount A prime mover inlet pressure fluctuation amount that is smaller than an exhaust temperature fluctuation amount and that is a difference between an inlet pressure of the prime mover acquired by the inlet pressure sensor and an inlet pressure of the prime mover stored in the storage unit is equal to or less than a predetermined value. In this case, the emergency generator is judged to be abnormal.

  According to the invention which concerns on Claim 3, abnormality detection by the combustion efficiency deterioration in the cylinder of a motor | power_engine can be performed.

Furthermore, in the emergency generator testing machine according to the invention of claim 4, the temperature sensor includes a supercharger inlet temperature sensor for measuring an inlet temperature at which exhaust from the prime mover is introduced into the supercharger. ,
The determination unit is a turbocharger in which the intake air temperature fluctuation amount is a difference between the inlet temperature of the turbocharger acquired by the turbocharger inlet temperature sensor and the inlet temperature of the turbocharger stored in the storage unit. If it is equal to or greater than the machine inlet temperature fluctuation amount, it is determined that the emergency generator is normal, the intake air temperature fluctuation quantity is smaller than the turbocharger inlet temperature fluctuation quantity, and the prime mover inlet pressure fluctuation quantity is If it is less than a predetermined value, it is determined that the emergency generator is abnormal.

  According to the invention which concerns on Claim 4, abnormality detection by the combustion efficiency deterioration in the cylinder of a motor | power_engine can be performed.

In the emergency generator testing machine according to the invention of claim 5, the temperature sensor includes a supercharger outlet temperature sensor for measuring an outlet temperature at which exhaust from the prime mover is exhausted through the supercharger. ,
The determination unit is the difference between the supercharger outlet temperature acquired by the supercharger outlet temperature sensor and the supercharger outlet temperature stored in the storage unit. If it is equal to or greater than a certain turbocharger outlet temperature fluctuation amount, the emergency generator is determined to be normal, the supercharger inlet temperature fluctuation amount is smaller than the supercharger outlet temperature fluctuation amount, and When the prime mover inlet pressure fluctuation amount is less than or equal to a predetermined value, it is determined that there is an abnormality in the emergency generator.

  According to the invention which concerns on Claim 5, abnormality detection by the efficiency fall of a supercharger can be performed.

The emergency generator testing machine according to claim 6 includes an intake air temperature sensor that measures an inlet temperature of the prime mover in which outside air is supplied via a supercharger.
The determination unit is less than a prime mover inlet temperature fluctuation amount, which is a difference between the prime mover inlet temperature acquired by the intake air temperature sensor and the prime mover inlet temperature stored in the storage unit, In addition, when the inlet pressure of the prime mover acquired by the inlet pressure sensor is lower than the inlet pressure of the prime mover stored in the storage unit, it is determined that there is an abnormality in the emergency generator. It is configured as a feature.

  According to the invention which concerns on Claim 6, abnormality detection in the intake system after the supercharger of a motor | power_engine can be performed.

Further, in the emergency generator testing machine according to the invention of claim 7, the sensor includes a concentration sensor for measuring a nitrogen oxide concentration in exhaust from the prime mover,
The determination unit determines that the emergency generator is abnormal when the nitrogen oxide concentration acquired by the concentration sensor is higher than the nitrogen oxide concentration stored in the storage unit by a predetermined amount or more. It is configured as a feature.

  According to the invention which concerns on Claim 7, abnormality detection in the combustion system of a motor | power_engine can be performed.

  According to the emergency generator testing machine of the present invention, it is possible to easily diagnose the location of occurrence of abnormality based on various data acquired in the emergency generator test without requiring skill or the like.

1 is an overall configuration diagram of an emergency generator and an emergency generator test machine in the present embodiment. It is a more detailed block diagram of a load test part. It is a block diagram of a motor | power_engine. It is a test flowchart of an emergency generator. It is a graph of the load input rate to the emergency generator with respect to time. It is a graph showing the relationship between T2 and T3 with respect to a load factor. It is a graph showing the relationship of P1 with respect to a load factor. It is a graph showing the relationship of the fuel consumption rate with respect to a load factor. It is a flowchart of the abnormality determination of a motor | power_engine based on the acquired data.

  Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an overall configuration diagram of an emergency generator and an emergency generator test machine according to the present embodiment. The emergency generator 2 installed in a factory, building, hospital, or the like is regularly tested in order to operate reliably in an emergency such as a power failure. The emergency generator testing machine of the present embodiment is for testing the operation of the emergency generator 2 having the AC three-phase generator 20 driven by the prime mover 21 at a predetermined load factor. The AC three-phase generator 20 of the present embodiment has a voltage of 6600 V and a rated output of 1000 KW.

  The emergency generator testing machine has a load test unit 1 including a load resistor 10 that converts electrical output from the emergency generator 2 into heat. The load test unit 1 is electrically connected to the AC three-phase generator 20 of the emergency generator 2 via the start control panel 4. Moreover, the load test part 1 has the sequencer 12 for performing a load test automatically. The sequencer 12 is connected to the computer 6.

  The prime mover 21 constituting the emergency generator 2 has a diesel engine 30. The diesel engine 30 includes a supercharger 34. Sensors 3 that measure temperature, pressure, and the like are provided at various locations on the prime mover 21. The sensor 3 will be described in detail later. The sensor 3 is connected to the interface box 5, and the interface box 5 can acquire information measured by the sensor 3 in accordance with a trigger signal from the computer 6. That is, the interface box 5 functions as a receiving unit that receives information measured by the sensor 3. The interface box 5 has a temporary storage unit that temporarily stores information measured by the sensor 3. The information stored in the temporary storage unit is sent to a device having a determination unit in order to diagnose an abnormality of the emergency generator 2. The determination unit is included in the server 8 in the present embodiment, but may be included in the interface box 5 itself or the computer 6.

  As the computer 6, a general PC can be used. Further, the computer 6 can communicate with the server 8 via the Internet network 7. Similarly, various measurement information acquired by the interface box 5 can be transmitted to the server 8 via the Internet network 7 using a general-purpose PC or the like. The server 8 is based on the information measured by the sensor 3, a determination unit that determines whether there is an abnormality in the emergency generator 2, and a storage unit that stores information acquired in past tests of the emergency generator 2. And have.

  In FIG. 2, the more detailed block diagram of the load test part 1 is shown. A plurality of load resistors 10 included in the load test unit 1 are provided in parallel. In the present embodiment, a total of five load resistors 10 are provided for each phase. Each load resistor 10 is provided with a switch portion 11 that can be turned on / off. The switch unit 11 can be switched on / off by a signal from the sequencer 12. In addition to the load resistor 10, a compensation resistor 19 is also provided.

  The load test unit 1 is provided with a high-pressure vacuum circuit breaker 17 on the side connected to the AC three-phase generator 20. The high-pressure vacuum circuit breaker 17 can be controlled from the sequencer 12, and the load test unit 1 can be protected by operating the high-pressure vacuum circuit breaker 17 when a problem or the like occurs during the test. A transformer 18 is provided on the compensation resistor 19 side from the high-pressure vacuum circuit breaker 17 to step down the voltage of 6600 V from the emergency generator 2 to a voltage suitable for the compensation resistor 19. A current regulator 19 a is provided between the transformer 18 and the compensation resistor 19. At the time of the load test, even if a predetermined load is applied, the current fluctuates actually. Therefore, the current is adjusted by the current regulator 19a so that the current becomes constant. The compensation resistor 19 converts the power flowing to the current regulator 19a side into heat.

  An ammeter 13, a voltmeter 14, a frequency meter 15, and a watt hour meter 16 are connected between the high-pressure vacuum breaker 17 and the switch unit 11. The data measured by these can be sent to the computer 6 via the sequencer 12, respectively.

  Next, the prime mover 21 will be described. In FIG. 3, the block diagram of the motor | power_engine 21 is shown. For the prime mover 21, air is taken in from the intake port 34 a of the supercharger 34. The supercharger 34 is driven by exhaust from the diesel engine 30 and compresses the supplied air. Air is guided to the diesel engine 30 of the prime mover 21 via the intake manifold 31. A fuel pump 33 is provided in the diesel engine 30, and fuel is supplied from a fuel tank (not shown) through a fuel supply pipe 33a.

  Exhaust gas from the diesel engine 30 is sent from the exhaust manifold 32 to the supercharger 34 to drive the supercharger 34. Exhaust gas from the supercharger 34 is discharged to the outside through an exhaust pipe 35.

  As for the prime mover 21, the temperature and the like are measured at various places by the sensor 3. FIG. 3 also shows specific measurement points. An exhaust temperature sensor is installed at a position close to the exhaust manifold 32, whereby the prime mover outlet exhaust temperature T1 is measured. A supercharger inlet temperature sensor is installed at a position close to the inlet of the supercharger 34, whereby the supercharger inlet temperature T2 is measured. A supercharger outlet temperature sensor is installed at a position close to the outlet of the supercharger 34, whereby the supercharger outlet temperature T3 is measured.

  The intake air temperature T4 taken from the intake port 34a of the supercharger 34 is measured by an intake air temperature sensor. Further, a prime mover inlet temperature sensor is installed at a position close to the intake manifold 31, and thereby the prime mover inlet temperature T5 is measured. In addition to this, a prime mover inlet pressure sensor is also installed at the prime mover inlet, whereby the prime mover inlet pressure P1 is measured.

  Regarding the fuel supplied to the prime mover 21, a fuel temperature sensor and a fuel flow rate sensor are installed at positions close to the fuel dispensing tank, and the fuel temperature T6 and the fuel flow rate F1 are measured by these. Since the specific gravity of the fuel is calculated from the fuel temperature T6, the fuel supply amount can be calculated from the specific gravity of the fuel and the fuel flow rate F1.

  Although not shown, the prime mover 21 is provided with a vibration sensor and a noise sensor. In addition, a concentration sensor that can measure the nitrogen oxide concentration in the exhaust gas is also installed. As a result, the vibration of the prime mover 21, the generated noise, and the nitrogen oxide concentration of the exhaust gas can be measured. All the sensors are connected to the computer 6 through the interface box 5 as described above. Note that the vibration sensor, the noise sensor, and the concentration sensor are not limited to those installed in the motor 21 or its surroundings, and may be hand-held devices.

  Among these sensors 3, a non-contact type radiation thermometer can be used for the temperature sensor. Although other types such as a thermometer using a thermocouple may be used, installation can be simplified by using a non-contact type thermometer. As the pressure sensor, a sensor using a piezoelectric element can be used. As the vibration sensor, a sensor having a triaxial accelerometer can be used. In addition, general noise sensors and flow meters can be used.

  Next, the test flow of the emergency generator 2 will be described. FIG. 4 shows a test flow diagram of the emergency generator 2. FIG. 5 shows a graph of the rate of loading of the emergency generator 2 with respect to time. When testing the emergency generator 2, first, the prime mover 21 is activated (S1-1). Next, at time t0, among the plurality of load resistors 10 provided in the load test section 1, 25% of the load resistors 10 corresponding to a quarter of the whole are turned on, and 25% of the rated output is turned on. The test is performed with the load applied (S1-2). The test at 25% load is performed for a predetermined time (S1-3). Here, the test is performed until the time reaches t1. The load test time is set in the range of several minutes to several tens of minutes in each load state.

During the test, measurements such as temperature and pressure are performed by each sensor 3 every predetermined time, for example, every 5 seconds, and the measurement data is sent to the interface box 5 and stored. Among the measurement data, for the temperatures T1 to T5, the turbocharger previously measured at the time of factory shipment or local delivery of the emergency generator 2 so that the data acquired at different times can be compared appropriately. Correction is performed using the intake air temperature of 34. The correction is performed as follows. When the intake air temperature of the turbocharger 34 at the time of factory shipment or local delivery is Tt and the intake air temperature of the supercharger 34 at the load test is Ta, Δt, which is a difference between them, is expressed as follows. Is done.
Δt = Ta−Tt

Assuming that the actually acquired temperature is Tb, the corrected temperature Tc is expressed as follows.
Tc = Tb−Δt

  Further, the fuel consumption is calculated as follows. First, the specific gravity of the fuel is calculated using the measured fuel temperature T6. The specific gravity of the fuel is calculated based on JIS K2249-4: 2011 "Appendix Table II Table 1B Density Conversion Table for Fuel Oil Temperature". When the specific gravity is calculated, the fuel consumption amount can be obtained by multiplying the specific gravity by the fuel flow rate F1 measured by the fuel flow rate sensor.

  As the predetermined time in S1-3, at least the time until the emergency generator 2 is in a steady state is set. Of the data acquired by the sensor 3, data used for diagnosis of the emergency generator 2 is data when the emergency generator 2 is in a steady state. As time until emergency generator 2 will be in a steady state, it is set as 5 minutes, for example.

  If a test with a 25% load is performed for a predetermined time, then at time t1, 50% of the load resistor 10 is turned on, and a test is performed with a load of 50% of the rated output being applied. (S1-4). The test with 50% load input is also continued for a predetermined time (S1-5).

  Similarly, at time t2, a load of 75% is applied (S1-6), and when a test over a predetermined time is performed (S1-7), a load of 100% is applied at time t3. (S1-8) When a test for a predetermined time is performed (S1-9), then, at time t4, a load of 110% is applied (S1-10), and a test for a predetermined time is performed. (S1-11) At time t5, the test is terminated (S1-12).

  As described above, the load test unit 1 of the present embodiment has five load resistors 10 for each phase. In the load test, the tests are performed in the order of 25%, 50%, 75%, 100%, and 110%. Therefore, the load resistor 10 that is used when the 25% load is applied is energized for the longest time. Will be. The load resistor 10 used when the 50% load is applied is energized for the second longest time, and the energization time is shortened in the order of the 75% load resistor 10 and the 100% load resistor 10 in the following order. For this reason, when loads are always applied in the same order, the energization time for the specific load resistor 10 is lengthened, and the period until the life of the load resistor 10 is reached is shortened. Therefore, in the emergency generator testing machine of the present embodiment, the order in which the load resistors 10 are inserted is changed for each test.

  Specifically, in one test, R1 is used when a load of 25% is applied, and then the load is applied in the order of R2, R3, and R4. In the next test, R2 is used when a load of 25% is applied, and then the load is applied in the order of R3, R4, and R1. In the next test, R3 is used when a load of 25% is applied, and then the load is applied in the order of R4, R1, and R2. In the next test, R4 is used at the time of 25% load application, and then load is applied in the order of R1, R2, and R3.

  Thus, by rotating the loading order of the load resistors 10, the energization time for each load resistor 10 can be leveled and the period until the life of the load resistor 10 is reached can be extended. .

  As a test of the emergency generator 2, in addition to such a load fluctuation test, a speed fluctuation rate test is also performed. In the speed fluctuation rate test, the emergency generator 2 is operated at 100% load under the rated voltage and rated frequency, and suddenly changed from 100% load to no load by the generator breaker. After the frequency reaches a steady state, a 50% load is suddenly applied. After the frequency reaches a steady state, the remaining 50% load is further suddenly applied. In each state, the rotational speed, frequency, voltage, and The time until the steady state is reached is measured.

  Data acquired by these tests is sent from the computer 6 to the server 8, where it is analyzed and the result can be output as a view or report.

  Data acquired from the sensor 3 in the load variation test can be compared with data acquired in the previous test. FIG. 6 shows a graph showing the relationship between T2 and T3 with respect to the load factor. As described above, T2 is the supercharger inlet temperature, and T3 is the supercharger outlet temperature. Both T2 and T3 increase as the load factor increases, and the temperature acquired this time is higher than the temperature acquired last time. This result suggests that the efficiency of the prime mover 21 is reduced due to deterioration over time.

  FIG. 7 shows a graph representing the relationship of P1 with respect to the load factor. As shown in this figure, the inlet pressure P1 of the prime mover 21 increases as the load factor increases, and the pressure acquired this time is lower than the pressure acquired last time. This result suggests that the efficiency of the supercharger 34 is reduced due to aging.

  FIG. 8 shows a graph showing the relationship of the fuel consumption rate to the load factor. As shown in this figure, the fuel consumption rate calculated from the fuel flow rate F1 and the fuel temperature T6 does not change much when the load factor is 50 to 100%, and increases when the load factor is lower and higher than that range. . In addition, the fuel consumption rate acquired this time is generally higher than the fuel consumption rate acquired last time. This result suggests that the efficiency of the prime mover 21 is reduced due to deterioration over time.

  Other data acquired by the sensor 3 can also be compared with the relationship with the load factor and the data acquired last time. In comparison with the previously acquired data, the server 8 determines whether there is an abnormality in the prime mover 21. FIG. 9 shows a flowchart of abnormality determination of the prime mover 21 based on the acquired data. The data used here can be, for example, data in a steady state in a test at 100% load application. However, data at other times may be used.

  In this flow, abnormality determination is performed by comparing the fluctuation, that is, the difference between the data acquired this time and the previously acquired data with other data or a threshold value. First, the fluctuation of T4 that is the supercharger intake temperature is compared with the fluctuation of T1 that is the prime mover outlet temperature (S2-1). If the variation in T4 is smaller than the variation in T1, it is further determined whether or not the variation in P1 that is the prime mover inlet pressure is equal to or less than a predetermined value (S2-2). Here, when the fluctuation of P1 is not more than a predetermined value, it is determined that there is an abnormality (S2-3). When the condition of S2-1 is satisfied, or when the condition of S2-1 is not satisfied and the condition of S2-2 is not satisfied, it is determined as normal.

  The abnormality in S2-3 is highly likely due to the deterioration of the combustion efficiency in the cylinder of the prime mover 21. In particular, a fuel pump, a fuel valve, a piston ring, a cylinder liner, and a supply / exhaust valve can be considered as places where there is a high possibility of causing a failure.

  Next, the fluctuation of T4 which is the supercharger intake temperature is compared with the fluctuation of T2 which is the supercharger inlet temperature (S2-4). If the variation in T4 is smaller than the variation in T2, it is further determined whether or not the variation in P1 that is the prime mover inlet pressure is equal to or less than a predetermined value (S2-5). Here, when the fluctuation of P1 is not more than a predetermined value, it is determined as abnormal (S2-6). When the condition of S2-4 is satisfied, or when the condition of S2-4 is not satisfied and the condition of S2-5 is not satisfied, it is determined as normal.

  The abnormality in S2-6 is likely due to the deterioration of the combustion efficiency in the cylinder of the prime mover 21 as in the abnormality in S2-3. In particular, a fuel pump, a fuel valve, a piston ring, a cylinder liner, and a supply / exhaust valve can be considered as places where there is a high possibility of causing a failure.

  Next, the fluctuation | variation of T2 which is a supercharger inlet temperature is compared with the fluctuation | variation of T3 which is a supercharger exit temperature (S2-7). If the variation in T2 is smaller than the variation in T3, it is further determined whether or not P1 that is the prime mover inlet pressure has decreased by a predetermined value or more (S2-8). Here, when P1 has decreased by a predetermined value or more, it is determined as abnormal (S2-9). When the condition of S2-7 is satisfied, or when the condition of S2-7 is not satisfied and the condition of S2-8 is not satisfied, it is determined as normal.

  The abnormality in S2-9 is highly likely to reduce the efficiency of the supercharger 34. In particular, the exhaust gas turbocharger may be contaminated or the filter may be clogged as a place where there is a high possibility of causing a failure.

  Next, the change in T4 that is the turbocharger intake temperature is compared with the change in T5 that is the prime mover inlet temperature (S2-10). If the variation in T4 is smaller than the variation in T5, it is further determined whether or not P1 that is the prime mover inlet pressure has decreased by a predetermined value or more (S2-11). Here, when P1 has decreased by a predetermined value or more, it is determined as abnormal (S2-12). When the condition of S2-10 is satisfied, or when the condition of S2-10 is not satisfied and the condition of S2-11 is not satisfied, it is determined as normal.

  The abnormality in S2-12 has a high possibility of causing a failure in the intake system after the supercharger 34. In particular, as a place where there is a high possibility that a failure has occurred, a decrease in the cooling efficiency of the air cooler, an internal contamination of the intake manifold 31, and the like can be considered.

  Although not included in this flow, the difference from the data in the previous test is also calculated for the nitrogen oxide concentration measured by the concentration sensor. When the nitrogen oxide concentration is increased by a predetermined value or more and when it is decreased by a predetermined value or more, it is determined as abnormal. When the nitrogen oxide concentration is higher than a predetermined level, there is a high possibility that an abnormality has occurred in the combustion system of the prime mover 21. Specifically, piston sludge accumulation, fuel pump, fuel valve, piston ring, cylinder liner abnormality, etc. can be considered. In addition, even when the nitrogen oxide concentration is lower than a predetermined level, there is a high possibility that an abnormality has occurred in the combustion system of the prime mover 21. Specifically, a fuel pump, a fuel valve, a piston ring, a cylinder liner abnormality, etc. can be considered.

  The server 8 stores in which step the abnormality is detected, and outputs information on the location where the above-described abnormality is assumed accordingly. Thereby, based on the various data acquired in the test of the emergency generator 2, the location where the abnormality has occurred can be easily diagnosed without requiring skill or the like.

  In particular, the emergency generator 2 is not always operated, but is operated only in the event of an emergency such as a power failure. For this reason, it is important to look at changes over time for each operation in order to find abnormalities. In this embodiment, the abnormality determination is performed when the variation between the data at the past test stored in the storage unit of the server 8 and the data acquired in the current test satisfies a predetermined condition. Thus, it is possible to make an appropriate abnormality determination in accordance with the characteristics of the emergency generator 2.

  Generally, the performance diagnosis of the emergency generator 2 is diverse, but the emergency generator test machine of the present embodiment focuses on diagnosing the soundness of the thermal efficiency of the prime mover 21.

  In the present embodiment, the abnormality determination is performed by comparing the data acquired in the previous test and the data acquired in the current test. However, any comparison with the data acquired in the past test is sufficient. Data obtained in previous tests may be used two times before.

  Although the embodiment of the present invention has been described above, the application of the present invention is not limited to this embodiment, and can be applied in various ways within the scope of its technical idea.

DESCRIPTION OF SYMBOLS 1 Load test part 2 Emergency generator 3 Sensor 4 Start-up control panel 5 Interface box 6 Computer 7 Internet network 8 Server 10 Load resistor 11 Switch part 12 Sequencer 13 Ammeter 14 Voltmeter 15 Frequency meter 16 Energy meter 20 AC three Phase generator 21 prime mover 30 diesel engine 31 intake manifold 32 exhaust manifold 33 fuel pump 34 supercharger 34a intake port 35 exhaust cylinder

Claims (7)

  1. An emergency generator test machine having a load test unit having a load resistor connected to an emergency generator, a sensor attached to the emergency generator, and a receiver for receiving information from the sensor. And
    The sensor includes at least a temperature sensor that measures a temperature in a prime mover of the emergency generator, and a pressure sensor that measures a pressure in the prime mover,
    An emergency generator comprising: a determination unit that detects an abnormality of the emergency generator based on information from the temperature sensor and the pressure sensor received by the reception unit, and outputs information on the abnormality For testing machine.
  2. It further has a storage unit that stores information on past tests,
    The determination unit compares information acquired from the sensor with information in a past test acquired from the storage unit, and detects an abnormality of the emergency generator based on the comparison result. The emergency generator testing machine according to claim 1.
  3. The temperature sensor includes at least an intake air temperature sensor that measures an intake air temperature with respect to a supercharger included in the prime mover, and an exhaust temperature sensor that measures an outlet exhaust temperature of the prime mover, and the pressure sensor includes at least an inlet of the prime mover. Including an inlet pressure sensor to measure pressure,
    The determination unit is configured such that an intake air temperature fluctuation amount, which is a difference between the intake air temperature acquired by the intake air temperature sensor and the intake air temperature stored in the storage unit, is an outlet exhaust gas temperature of the prime mover acquired by the exhaust gas temperature sensor and the When the engine outlet exhaust temperature fluctuation amount is a difference from the motor outlet exhaust temperature stored in the storage unit, the emergency generator is determined to be normal, and the intake air temperature fluctuation amount A prime mover inlet pressure fluctuation amount that is smaller than an exhaust temperature fluctuation amount and that is a difference between an inlet pressure of the prime mover acquired by the inlet pressure sensor and an inlet pressure of the prime mover stored in the storage unit is equal to or less than a predetermined value. 3. The emergency generator testing machine according to claim 2, wherein in that case, it is determined that the emergency generator is abnormal.
  4. The temperature sensor includes a supercharger inlet temperature sensor that measures an inlet temperature at which exhaust from the prime mover is introduced into the supercharger,
    The determination unit is a turbocharger in which the intake air temperature fluctuation amount is a difference between the inlet temperature of the turbocharger acquired by the turbocharger inlet temperature sensor and the inlet temperature of the turbocharger stored in the storage unit. If it is equal to or greater than the machine inlet temperature fluctuation amount, it is determined that the emergency generator is normal, the intake air temperature fluctuation quantity is smaller than the turbocharger inlet temperature fluctuation quantity, and the prime mover inlet pressure fluctuation quantity is 4. The emergency generator testing machine according to claim 3, wherein if it is less than a predetermined value, it is determined that the emergency generator is abnormal.
  5. The temperature sensor includes a supercharger outlet temperature sensor that measures an outlet temperature at which exhaust from the prime mover is exhausted through a supercharger,
    The determination unit is the difference between the supercharger outlet temperature acquired by the supercharger outlet temperature sensor and the supercharger outlet temperature stored in the storage unit. If it is equal to or greater than a certain turbocharger outlet temperature fluctuation amount, the emergency generator is determined to be normal, the supercharger inlet temperature fluctuation amount is smaller than the supercharger outlet temperature fluctuation amount, and 5. The emergency generator testing machine according to claim 4, wherein when the prime mover inlet pressure fluctuation amount is equal to or less than a predetermined value, it is determined that the emergency generator is abnormal.
  6. The temperature sensor includes an intake air temperature sensor that measures an inlet temperature of the prime mover in which outside air is supplied via a supercharger,
    The determination unit is less than a prime mover inlet temperature fluctuation amount, which is a difference between the prime mover inlet temperature acquired by the intake air temperature sensor and the prime mover inlet temperature stored in the storage unit, In addition, when the inlet pressure of the prime mover acquired by the inlet pressure sensor is lower than the inlet pressure of the prime mover stored in the storage unit, it is determined that there is an abnormality in the emergency generator. The emergency generator testing machine according to any one of claims 3 to 5, wherein:
  7. The sensor includes a concentration sensor that measures a nitrogen oxide concentration in exhaust gas from the prime mover,
    The determination unit determines that the emergency generator is abnormal when the nitrogen oxide concentration acquired by the concentration sensor is higher than the nitrogen oxide concentration stored in the storage unit by a predetermined amount or more. The emergency generator testing machine according to any one of claims 2 to 6, wherein:
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