KR101924221B1 - System and method for generator manufacturing that recycles gas engine for vehicles - Google Patents

Abstract

The present invention relates to a system and a method for reusing a generator of a gas engine for a vehicle, which reuses a gas engine taken out of a vehicle using gas as fuel. Moreover, the present invention can be reused as an industrial generator through inspection and replacement of each composition part and reprocessing and change of components according to use change.

Description

TECHNICAL FIELD [0001] The present invention relates to a system and a method for recycling a gas engine for a vehicle,

The present invention relates to a system and a method for manufacturing a generator, and more particularly, to a method and apparatus for generating and regenerating a gas generator by recycling a gas engine exhausted from a vehicle using gas as fuel, And more particularly, to a system and method for generator recycling of a gas engine for a vehicle.

In general, production facilities such as factories, buildings, and large hospitals are provided with their own generators for emergency power supply due to cut-off of commercial power and power supply at peak hours of power usage.

Self-generated generators equipped in these various facilities can be operated normally in consideration of the power supply and demand situation. However, since they are not operated except for an emergency due to high operation cost such as fuel cost compared with relatively low commercial power, Since it is based on the related laws or in case of emergency, it is necessary to maintain the system in preparation for use. Therefore, the high purchase cost and maintenance cost of the generator are considerably burdensome to the facility.

In addition, these self-generators must be installed in order to provide power in places where commercial power supply is not smooth, such as ships, small-scale islands, and secluded remote areas. In particular, large power plants and power infrastructure such as developing countries and low- In this situation, demand for such a self-generator is constant, but it is also a burden due to expensive generator cost.

Due to the increase in fuel costs due to rising oil prices and the problem of air pollution such as SOx, NOx, and ultrafine dust, natural gas engines replacing conventional diesel fuel engines have been widely used in public transportation buses and the like. However, In order to reduce the cost of purchasing and operating the generator, recycling of the engine of the scrapped car as a generator is considered to greatly reduce the manufacturing cost and the operating cost including the fuel cost.

However, there is still a problem to be solved for quality assurance such as systematic history management as well as ensuring the reliability of the generator due to the recycling of the scrap engine.

Registration No. 10-1544433 (2015.08.07)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a gas engine which is inspecting and replacing components of a gas engine for a vehicle, The present invention provides a system and method for generator recycling of a gas engine for a vehicle that can be reused as an industrial generator through rework and modification of the engine.

In order to achieve the above-mentioned object, the present invention provides a gas engine recycling system for a vehicle gas engine, comprising: a gas engine-specific information; an inspection item information and reference information for each constituent part; maintenance information and consumable information; Established database; A goods receipt processing unit for receiving specification information and maintenance history information together with receipt of a gas engine which is taken out of the vehicle; An inspection progress unit for providing inspection item information corresponding to the received gas engine in accordance with decomposition and cleaning of the gas engine to perform inspection for each part, and receiving and storing inspection results; A first judging unit for comparing the check result with the retrieved reference information to judge reuse or reprocessing or replacement; An update unit for providing the retrieved maintenance information and updating the maintenance history information in accordance with the maintenance progress through reuse or rework or replacement of the part according to the determination result of the first determination unit; A usage change support unit for calculating a power generation capacity through the inputted specification information and maintenance history information and providing a generator and associated information corresponding to the calculated power generation capacity; A calculation unit for calculating the fuel system and the cooling system and the bed standard through the inputted specification information and the maintenance history information; Provided with the generated generator and its associated information, the fuel system and the cooling system and the bed, the pressure sensor and the temperature sensor installed in the engine during re-assembly after the re-assembly, Or an abnormality; .

At this time, it is preferable that the inspection progress unit includes a digital vernier caliper and a micrometer, and is configured to receive a measurement value corresponding to the provided inspection item information.

In addition, the commissioning section includes a first collecting section for collecting measured values over time through a pressure sensor and a temperature sensor provided in each system, which are divided into intake and exhaust of the engine, fuel, lubrication and cooling system, A second collecting unit for collecting the voltage, frequency and current measurement values of the power according to a time flow; a load bank for applying a load set to the generator; and a second collecting unit for collecting measured values of the first collecting unit and the second collecting unit, And a second determination unit for determining whether the abnormality is abnormal according to the setting range.

In order to achieve the above-mentioned object, a method for recycling a gas engine for a vehicle according to the present invention includes a step of acquiring information on gas engines, inspection item information and reference information for each component, maintenance information and consumable information, Storing and building a database; Receiving specification information and maintenance history information together with receipt of a gas engine that is taken out of the vehicle; Providing inspection item information corresponding to the received gas engine in accordance with decomposition and cleaning of the gas engine to perform inspection for each part, receiving and storing inspection results; Comparing the check result with the retrieved reference information to judge reuse or rework or replacement; Providing the retrieved maintenance information and updating the maintenance history information reflecting the maintenance progress through reuse or rework or replacement of the part according to the determination; Calculating a power generation capacity through the inputted specification information and maintenance history information, and providing a generator and associated information corresponding to the calculated power generation capacity; Calculating a fuel system and a cooling system and a bed standard through inputted specification information and maintenance history information; Provided with the generated generator and its associated information, the fuel system and the cooling system and the bed, the pressure sensor and the temperature sensor installed in the engine during re-assembly after the re-assembly, Determining whether the abnormality is abnormal or not; .

In this case, the part-by-part check-up preferably includes receiving a measurement value corresponding to the inspection item information provided through the digital vernier caliper and micrometer.

In addition, the step of determining whether the engine is normal or abnormal may include collecting the measured values through a pressure sensor and a temperature sensor provided in each of the systems in accordance with time, dividing the engine into intake / exhaust, fuel, lubrication, A step of collecting the voltage, frequency and current measurement value of the generator's production power according to time, a step of applying the load set to the generator, a step of monitoring the measured value according to the set load, It is preferable that the step of judging is performed.

In the present invention, it is easy to supply and receive a gas engine in the recycling of a gas engine exhausted from a scrapped vehicle, in particular, a gas engine as an industrial generator, through inspection and replacement of each constituent part, re- The change can provide a significant cost savings over new product purchases.

Especially, it is possible to reduce fuel cost by using gas as a fuel, so that it can reduce the electricity fee and facility operation cost through operation at the peak time of power usage, and it is expected to be eco-friendly, economical, and low pollution effect .

1 is a photograph of a gas engine generator recycled through the present invention,
2 is a block diagram according to an embodiment of a generator recycling system for a gas engine for vehicles of the present invention,
3 is a block diagram according to another embodiment of a commissioning section of a generator recycling system for a gas engine for vehicles of the present invention,
4 is a flowchart showing a method of recycling a generator for a gas engine for vehicles of the present invention
5 is a flowchart showing the detailed procedure for trial operation in the present invention.

Hereinafter, a generator recycling system for a gas engine for a vehicle of the present invention will be described in detail with reference to the accompanying drawings.

The present invention can be utilized as an industrial generator by inspecting and replacing each component part of a gas engine that has been dismantled due to a vehicle being scrapped, , All processes are systematically computerized and output without missing process, and check and management can be done.

FIG. 2 is a block diagram of a gas engine recycling system for a vehicle gas engine according to the present invention. In the present invention, the database 110, the goods receipt processing unit 120, the inspection progress unit 130, The update section 150, the usage change support section 160, the output section 170, and the test run section 180, and may be implemented in the form of a computer or equivalent terminal.

In the present invention, the database 110 stores the gas engine-specific information, the inspection item information and the reference information for each component, the maintenance information and the consumable information, and the generator / And stored.

In other words, when a gas engine is used from a single type of vehicle such as a public transportation bus, information about a single engine is collected and stored. When a variety of gas engines are to be recycled from a plurality of types of vehicles, , Engine type, output, etc., together with inspection items for consumable parts such as cylinder liners, valves, pistons and piston rings, connecting rods, bearings, etc., in the form of tables The inspection item information and the reference information serving as a replacement standard are stored.

In addition, the maintenance information indicating the maintenance period and maintenance method of the engine parts distributed in the form of instruction book through the manufacturer and the consumable information on the specifications and types of various consumable parts such as O-rings, gaskets, A database 110 is constructed by computerizing a series of information necessary for recycling a waste gas engine for a vehicle, such as a generator for a combinable generator and various auxiliary information for combining the generator and the generator, to the generator engine.

The goods receipt processing unit 120 is configured to receive specification information and maintenance history information together with goods receipt of the gas engine that has been taken out of the vehicle. The actual engine recycling process is started as the waste gas engine is received and the specification information and the maintenance history information are input in the state where the database 110 is constructed, and the specification information corresponding to the input financial information is stored in the database 110 ), Inspection item information and reference information according to the engine type, maintenance information and consumable information, and generators and accessory information by generating capacity are continuously provided according to the process progress.

In addition, since the maintenance differentiated according to the operation time is performed in the normal engine operation, the maintenance history information according to the conventional vehicle engine operation is input, and the maintenance history information is linked and managed to support proper plan maintenance according to the entire engine life cycle do.

The inspection progress unit 130 provides inspection item information corresponding to the received gas engine in accordance with the decomposition and cleaning of the gas engine, performs inspection for each part, and receives and stores inspection results. At this time, there are some items that are subjected to visual inspection due to the characteristics of the parts, but a lot of inspection is carried out through various measuring equipments so that more accurate part replacement can be performed by inspecting accurate wear.

To this end, the inspection progress unit 130 includes a digital vernier caliper 131, a micrometer 132, and a digital image input unit 133 such as a camera. The inspection progress unit 130 includes a vernier caliper 131 and the micrometer 132 and the digital image input unit 133 in a wire-wireless manner.

Basically, the inspection item information includes an engine block including a piston, a piston ring and a connecting rod, a cylinder liner and a metal bearing, a cylinder head including an intake / exhaust valve and a rocker arm, a push rod and a cam, an oil cooler and a breather, It will include inspection items for start motor, damper pulley, water pump, fan pulley, intake / exhaust manifold, water pipe, engine oil inlet and gauge, air compressor, ignition coil and spark plug.

The first determination unit 140 compares the check result input through the inspection progress unit with the reference information retrieved through the database 110 to determine whether to reuse or rework or replace the reference information. It is judged that replacement can be made for a part having many or damaged parts and reusable in other cases. If there is no specific numerical reference, the image input unit 133 may determine whether the image is reused or replaced through reference information corresponding to a visual inspection item such as morphological transformation or discoloration.

The update unit 150 provides the searched maintenance information and updates the maintenance history information reflecting the maintenance progress through reuse, reprocessing or replacement of the part according to the determination result of the first determination unit 140 do.

The maintenance information includes a mounting method of a part removed and setting information when a specific setting is required. For example, the maintenance information may be a gap between the intake / exhaust valve and the rocker arm in the cylinder head. In addition, it is possible to effectively manage the replacement cycle of the consumables according to the maintenance cycle by reflecting and updating the replacement history in the maintenance history information when maintenance is performed through replacement of parts or consumables.

The usage change support unit 160 calculates the power generation capacity using the input specification information and the maintenance history information, and provides the generator and the associated information corresponding to the calculated power generation capacity. That is, in accordance with the output of the engine to be recycled, the power generation capacity is calculated through information arranged in a predetermined formula or a table. At this time, when the use period of the engine has elapsed The available capacity is subtracted from the service life and the maintenance history. The database 110 searches for and provides a variety of accessory information corresponding to the calculated power-generating capacity and the combined operation with the corresponding generator.

In this case, there is a configuration that must be added in using the vehicle engine as an engine for a generator, and there is a configuration that needs to be changed or removed. Therefore, such a configuration is provided as accessory information. Particularly, a flywheel, The types and coupling relationships of the generators can be changed and provided for the generators, and if necessary, the controller design for the generator control can be made.

The output unit 170 calculates a fuel system, a cooling system, and a bed standard based on inputted specification information and maintenance history information. In the case of an automobile engine, a more complicated line may be formed to efficiently utilize a relatively narrow space by a fuel and cooling system optimized for a vehicle space. However, in the case of a generator engine fixedly installed in a specific place, There is a spatial margin and can be made in other forms optimized for the installation site. Accordingly, the output section 170 is designed so that the fuel, lubricant, cooling water, and power generation system for the intake and exhaust of the engine, including the bed, can be installed smoothly in the designated place, .

The commissioning unit 180 includes a pressure sensor and a temperature sensor installed in the engine in a configuration related to the provided generator and associated information, a fuel system, a cooling system, and a trial run performed after the reassembly performed by the bed, It provides the result value in conjunction with frequency and current, determines whether it is normal or abnormal, and outputs it to the manager.

During the trial run, it is possible to determine the abnormality by comparing the measured values of the engine, specifically the temperature sensor provided in the cooling system and the intake / exhaust system, and the pressure sensor of the fuel, lubricating system and cooling water system, It is preferable that the load is applied to the generator, the commissioned time is set and the abnormality is detected.

3 is a block diagram of a start-up unit of a gas engine recycling system for a vehicle gas engine according to the present invention. The start-up unit 180 includes a first collecting unit 181, a second collecting unit 182, The bank 183, and the second determination unit 184 shown in FIG.

The first collecting unit 181 divides the system of the engine into the intake / exhaust, the fuel, the lubrication, and the cooling system, and collects the measured values through the pressure sensor and the temperature sensor provided in each system according to time.

At the same time, the second collector 182 collects the voltage, the frequency, and the current measurement value of the generated power of the generator according to the time flow.

The first collecting unit 181 and the second collecting unit 182 are configured to perform trial operation according to the operation of the generator in a no-load state. It is possible to check whether the system is normal or not.

The load bank 183 is configured to apply the load set to the generator and corresponds to the load test for the capacity of the generator.

The second determination unit 184 monitors the measured values of the first collecting unit 181 and the second collecting unit 182 according to the set load and determines whether the abnormality is abnormal according to the set range. In the normal operation state, the normal range of the temperature and the pressure of each system is set, and it is determined whether the value collected through the first collecting unit 181 belongs to the normal range to grasp the abnormal state. It is confirmed through the second collecting unit 182 whether the normal value is maintained for the voltage and the frequency change.

Hereinafter, a method of recycling a generator for a vehicle gas engine according to the present invention will be described in detail.

FIG. 4 is a flowchart showing a method of recycling a generator for a vehicle gas engine according to the present invention. This series of steps can be performed through the above-described generator gas recycling system for a gas engine for a vehicle.

In the first step (S 110), the database is constructed by storing the gas engine-specific specification information, the inspection item information and the reference information for each constituent part, the maintenance information and consumable information, and the generator and fitting information for each generating capacity.

That is, when a gas engine is used out of a single type of vehicle such as a bus for public transportation, a single information is collected and stored. When various types of gas engines are to be recycled from a plurality of types of vehicles, Type, and output, together with the inspection items for the consumable parts such as the cylinder liners, the valves, the pistons and the piston rings, the connecting rods, and the bearings, And the reference information serving as an information and replacement standard is stored.

In addition, the maintenance information indicating the maintenance period and maintenance method of the engine parts distributed in the form of instruction book through the manufacturer and the consumable information on the specifications and types of various consumable parts such as O-rings, gaskets, A set of information necessary for recycling a waste gas engine for a vehicle such as a generator engine and a variety of auxiliary information for combining the generators and generators for the combinable generators is constructed as a database.

In the second step (S 120), the specification information and the maintenance history information are input together with the receipt of the gas engine that has been taken out of the vehicle. The actual engine recycling process is started as the waste gas engine is received and the specification information and the maintenance history information are inputted in the state where the database is constructed. The specification information corresponding to the input financial information is retrieved from the database, The inspection item information and the reference information according to the type, the maintenance information and the consumable information, and the generator and the accessory information according to the generation capacity are continuously provided.

In addition, since the maintenance differentiated according to the operation time is performed in the normal engine operation, the maintenance history information according to the conventional vehicle engine operation is input, and the maintenance history information is linked and managed to support proper plan maintenance according to the entire engine life cycle do.

In the third step (S 130), inspection item information corresponding to the gas engine that is received according to the decomposition and cleaning of the gas engine is provided to perform inspection for each part, and the inspection result is received and stored.

At this time, there are some items that are subjected to visual inspection due to the characteristics of the parts, but a lot of inspection is carried out through various measuring equipments so that more accurate part replacement can be performed by inspecting accurate wear.

At this time, the part-by-part check-up is performed through a digital image input unit such as a digital vernier caliper, a micrometer and a camera, and the measurement values from the vernier caliper, the micrometer, and the digital image input unit, And receiving the data.

Basically, the inspection item information includes an engine block including a piston, a piston ring and a connecting rod, a cylinder liner and a metal bearing, a cylinder head including an intake / exhaust valve and a rocker arm, a push rod and a cam, an oil cooler and a breather, It will include inspection items for start motor, damper pulley, water pump, fan pulley, intake / exhaust manifold, water pipe, engine oil inlet and gauge, air compressor, ignition coil and spark plug.

In the fourth step (S 140), the check result is compared with the retrieved reference information to judge reuse, rework or replacement. It is judged that it is possible to replace the part with more wear or damage than the reference value shown in the reference information and reuse it in other cases. If there is no specific numerical criterion, it can be judged whether or not to be reused or replaced through reference information corresponding to a visual inspection item such as morphological deformation or discoloration through the image input unit.

In the fifth step (S 150), the retrieved maintenance information is provided, and the maintenance history information is updated reflecting the maintenance progress through reuse, rework or replacement of the part according to the determination.

The maintenance information includes a mounting method of a part removed and setting information when a specific setting is required. For example, the maintenance information may be a gap between the intake / exhaust valve and the rocker arm in the cylinder head. In addition, it is possible to effectively manage the replacement cycle of the consumables according to the maintenance cycle by reflecting and updating the replacement history in the maintenance history information when maintenance is performed through replacement of parts or consumables.

In the sixth step S 160, the power generation capacity is calculated using the input specification information and the maintenance history information, and the generator and the associated information corresponding to the calculated power generation capacity are provided.

That is, in accordance with the output of the engine to be recycled, the power generation capacity is calculated through information arranged in a predetermined formula or a table. At this time, when the use period of the engine has elapsed The available capacity is subtracted from the service life and the maintenance history. The generator corresponding to the calculated power-generating capacity and various additional information for the combined operation with the generator are searched and provided in the database.

In this case, there is a configuration that must be added in using the vehicle engine as an engine for a generator, and there is a configuration that needs to be changed or removed. Therefore, such a configuration is provided as accessory information. Particularly, a flywheel, The types and coupling relationships of the generators can be changed and provided for the generators, and if necessary, the controller design for the generator control can be made.

In the seventh step (S 170), the fuel system and the cooling system and the bed standard are calculated through the inputted specification information and the maintenance history information.

In the case of an automobile engine, a more complicated line may be formed to efficiently utilize a relatively narrow space by a fuel and cooling system optimized for a vehicle space. However, in the case of a generator engine fixedly installed in a specific place, There is a spatial margin and can be made in other forms optimized for the installation site. Accordingly, the calculation unit calculates and supplies the fuel, lubricant, and cooling water required for the engine, as well as the power generation system for the intake and exhaust of the engine, by algorithms so that the installation can be smoothly performed at the designated place while meeting the engine specification information do.

In the eighth step (S 180), the pressure sensor and the temperature sensor installed in the engine during re-assembly after the re-assembly of the provided generator and associated information, the fuel system and the cooling system and the bed, And provides a result value to determine whether it is normal or abnormal.

During the trial run, it is possible to determine the abnormality by comparing the measured values of the engine, specifically the temperature sensor provided in the cooling system and the intake / exhaust system, and the pressure sensor of the fuel, lubricating system and cooling water system, It is preferable that the load is applied to the generator, the commissioned time is set and the abnormality is detected.

FIG. 5 is a flowchart showing a detailed procedure for trial operation in the present invention, and shows a subdivision of the eighth step (S 180).

(S 181) of collecting measured values through a pressure sensor and a temperature sensor provided in each of the systems by dividing the engine into intake / exhaust, fuel, lubrication, and cooling systems (S 181) A step S 182 of collecting voltage, frequency and current measurement values along the time axis is performed. This enables commissioning according to the operation of the generator under no-load condition, and it is possible to check whether or not each system is normal through the collected input and temperature values as well as normal operation of the engine.

Next, a step S 183 of applying a load set to the generator is performed. The test load corresponding to the capacity of the generator is applied. The measured value corresponding to the last set load is monitored, (S184). For this, a normal range of temperature and pressure of each system is basically set in a normal operation state to determine whether the pressure and temperature values collected in the previous step (S181) belong to the normal range, When the load is applied, it is confirmed whether or not the normal value is maintained for the voltage and frequency changes collected.

FIG. 1 is a photograph of a gas engine generator recycled through the present invention, which shows a photograph of an actual recycled product having a power generation section, an engine section, a cooling section and a control section.

It is to be understood that the invention is not limited to the disclosed embodiment, but is capable of many modifications and variations within the scope of the appended claims. It is self-evident.

110: database 120: goods receipt processor
130: inspection progress unit 131: vernier caliper
132: micrometer 133: digital image input unit
140: first judgment unit 150:
160: application change support unit 170:
180: Commissioning section 181: First collecting section
182: second collecting unit 183: load bank
184:

Claims (6)

A database 110 in which the gas engine-specific specification information, the inspection item information and the reference information for each constituent part, the maintenance information and the consumable information, and the generator and the fitting information for each generating capacity are stored and constructed;
A goods receipt processing unit (120) for receiving specification information and maintenance history information together with goods receipt of a gas engine that is taken out of the vehicle;
An inspection progress unit 130 for providing inspection item information corresponding to the received gas engine in accordance with the decomposition and cleaning of the gas engine to perform an inspection for each part, and for receiving and storing inspection results;
A first determination unit 140 for comparing the result of the check with the searched reference information to determine reuse or rework or replacement;
An update unit 150 for providing the retrieved maintenance information and updating the maintenance history information based on the maintenance progress through reuse, rework or replacement of the part according to the determination result of the first determination unit 140;
A usage change support unit 160 for calculating a power generation capacity through the inputted specification information and maintenance history information and providing a generator and associated information corresponding to the calculated power generation capacity;
An output unit 170 for calculating the fuel system and the cooling system and the bed standard through the inputted specification information and the maintenance history information;
Provided with the generated generator and its associated information, the fuel system and the cooling system and the bed, the pressure sensor and the temperature sensor installed in the engine during re-assembly after the re-assembly, (180) for judging whether the abnormality is abnormal or not; Wherein the gas engine recycle system comprises:
The method according to claim 1,
Wherein the inspection progress unit (130) is configured to receive a measurement value corresponding to inspection item information provided, including a digital vernier caliper (131) and a micrometer (132) Recycling system.
The method according to claim 1,
The commissioning unit 180 includes a first collecting unit 181 for collecting measured values through a pressure sensor and a temperature sensor, which are divided into an intake / exhaust system, a fuel system, a lubrication system, and a cooling system, A second collecting unit 182 for collecting the voltage, frequency and current measurement value of the generator's power over time, a load bank 183 for applying the load set to the generator, And a second judging unit (184) for monitoring the measured values of the first collecting unit (181) and the second collecting unit (182) and judging the abnormality according to the set range. .
A method of recycling a gas engine for a vehicle, which is carried out through a generator recycling system of a gas engine for a vehicle,
(S 110) storing the gas engine-specific specification information, the inspection item information and the standard information for each constituent part, the maintenance information and the consumable information, and the generator and fitting information for each generating capacity;
A step (S 120) of receiving specification information and maintenance history information together with the receipt of a gas engine which is taken out of the vehicle;
A step S 130 of providing inspection item information corresponding to the received gas engine according to the disassembly and cleaning of the gas engine to perform inspection for each part and receiving and storing inspection results;
Comparing the check result with the searched reference information to determine whether the reuse or rework or replacement is performed (S 140);
Providing the retrieved maintenance information, and updating the maintenance history information in accordance with the determination, along with the maintenance progress through reuse, rework or replacement of the part (S 150);
Calculating a power generation capacity through the inputted specification information and maintenance history information, and providing a generator and associated information corresponding to the calculated power generation capacity (S 160);
Calculating (S 170) the fuel system and the cooling system and the bed standard through the inputted specification information and the maintenance history information;
Provided with the generated generator and its associated information, the fuel system and the cooling system and the bed, the pressure sensor and the temperature sensor installed in the engine during re-assembly after the re-assembly, (S 180) judging whether the abnormality is abnormal or not; Of the gas engine (1).
5. The method of claim 4,
Wherein the step of performing the part-by-part check includes receiving a measurement value corresponding to inspection item information provided through a digital vernier caliper and a micrometer.
5. The method of claim 4,
The step of determining normal or abnormal state (S 180) is divided into intake / exhaust of the engine, fuel, lubrication and cooling system, and the measured values are collected through the pressure sensor and the temperature sensor provided in each system according to time A step S182 of collecting a voltage, a frequency and a current measurement value of the generated power of the generator according to a time flow, a step S183 of applying a load set to the generator, (S184) of monitoring the measured value according to the set range and determining whether the abnormality is in accordance with the set range.

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