JP2010262468A - Remote monitoring system for power generation facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a remote monitoring system for a power generation facility, allowing sufficient preventive maintenance by intensively collecting data at start time of to rapidly and properly detect abnormality of an operation state and a sign thereof. <P>SOLUTION: The remote monitoring system 1 for remotely monitoring the operation state of the stationary power generation facility 2 and performing the preventive maintenance includes: a monitoring terminal 4 installed near the power generation facility 2, collecting operation data of the power generation facility 2; and a remote monitoring center 5 connected with the monitoring terminal 4 via a communication line 81, receiving the operation data transmitted from the monitoring terminal 4, and performing abnormality diagnosis of the power generation facility 2 based on the operation data. The monitoring terminal 4 collects start operation data that are the operation data in a preset start operation period in the power generation facility 2 at a collection time interval shorter than a collection time interval at which steady operation data that are the operation data in a steady operation state after the start operation period are collected. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a remote monitoring system for a power generation facility that performs remote maintenance by monitoring the operating state of a stationary power generation facility.

For example, a power generation facility used in a cogeneration system or the like has a very large influence when a trouble occurs due to the nature of an energy supply facility. Therefore, a remote monitoring system is often installed in such a power generation facility.
The remote monitoring system makes it possible to grasp the operation state while remotely monitoring the power generation equipment and to respond promptly in the event of a failure. On the other hand, the remote monitoring system collects various data related to daily operating conditions, checks the soundness of power generation facilities, investigates abnormalities and their signs, etc. to prevent normal operation. It is also used for conservation.

  Basically, preventive maintenance by remote monitoring is analyzed using collected data. Therefore, the ability of preventive maintenance depends on the quality of the data collected. Here, the quality of data includes the type of data to be monitored, resolution, collection period (storage period), collection time interval, and the like. In particular, regarding the collection period and the collection time interval, it is preferable that the collection period is as short as possible and the collection time interval is as long as possible because the data capacity of the remote monitoring center in the remote monitoring system is limited. However, from the viewpoint of preventive maintenance, it is necessary to perform more detailed analysis, and the reverse is desirable.

Therefore, in the current remote monitoring system, considering these balances, appropriate data collection periods and collection time intervals are set.
For example, in Patent Documents 1 and 2, the data collection period is changed according to the state of the equipment, data is collected in a long period when normal, and a short period when abnormal, thereby reducing data load and necessary data. A remote monitoring system that can monitor the situation has been proposed.

Japanese Patent Laid-Open No. 11-296222 JP 60-196032 A

  However, even when using a remote monitoring system, depending on the type of failure, data with a relatively long collection time interval such as data collected by remote monitoring cannot grasp abnormalities and signs, and preventive maintenance can be sufficiently achieved. May not be possible. In order to solve this problem, it is conceivable to shorten the collection time interval. However, as described above, since the data capacity of the remote monitoring center is limited, it is not an effective means.

In addition, the remote monitoring systems of Patent Documents 1 and 2 described above collect short-period data when an abnormality occurs, and as a result, it is not possible to perform analysis using short-period data before the occurrence of an abnormality. After all, preventive maintenance cannot be achieved sufficiently.
Therefore, a remote monitoring system that can detect abnormalities of power generation facilities and signs thereof effectively and can sufficiently perform preventive maintenance in consideration of the problem of data capacity is desired.

  The present invention has been made in view of such conventional problems, and by collecting data at the time of starting intensively, it is possible to quickly and appropriately detect abnormalities in operating conditions and signs thereof, and to sufficiently perform preventive maintenance. It is an object of the present invention to provide a remote monitoring system for power generation equipment that can be realized.

The present invention relates to a remote monitoring system for a power generation facility that performs remote maintenance by monitoring the operation state of a stationary power generation facility.
A monitoring terminal installed in the vicinity of the power generation facility and collecting operation data of the power generation facility;
A remote monitoring center that is connected to the monitoring terminal via a communication line, receives the operation data transmitted from the monitoring terminal, and performs an abnormality diagnosis of the power generation facility based on the operation data; ,
The monitoring terminal is configured to collect start-up operation data that is operation data during a preset start-up operation period in the power generation facility more than a collection time interval that collects normal operation data that is operation data in a normal operation state after the start-up operation period. The power generation facility remote monitoring system is configured to collect at a short collection time interval (Claim 1).

  The power generation facility remote monitoring system of the present invention includes a monitoring terminal that collects operation data of the power generation facility, and a remote monitoring center that performs abnormality diagnosis of the power generation facility based on the operation data. The monitoring terminal is configured to collect the start operation data during the start operation period at a collection time interval shorter than the collection time interval for collecting the subsequent steady operation data in the steady operation state. As a result, abnormalities in operating conditions and signs thereof can be detected quickly and appropriately, and preventive maintenance can be sufficiently achieved.

That is, with the normal operation data that is normally collected, the data collection time interval is rough, and highly accurate data analysis and preventive maintenance cannot be realized. In addition, it is difficult to grasp the operating state at the time of starting that moves excessively, and it is difficult to detect an abnormality that occurs at the time of starting and its signs.
Therefore, in the remote monitoring system of the present invention, when the power generation equipment is started, data is collected at a cycle shorter than the cycle collected at the normal time, and detailed data at the start can be obtained.

  For this reason, it is possible to detect an abnormality and a sign at the time of starting the power generation facility, which is difficult from the steady operation data, based on the start operation data. In particular, by collecting the excessive data at the time of starting finely, it is possible to grasp the operating state at the time of starting in more detail, and it is possible to realize highly accurate abnormality detection. As a result, it is possible to promptly and appropriately detect an abnormality at the time of starting the power generation facility and the sign thereof, prevent a failure in advance, and perform preventive maintenance.

  Further, it is possible to obtain the effect of preventing abnormalities that occur in the steady state by collecting the data at the start in detail and sufficiently grasping the operation state at the start. In other words, some of the abnormalities that occur during steady state may be seen during startup. Therefore, according to the remote monitoring system of the present invention, it is possible to detect signs of abnormality occurring at the time of steady state from the data at the time of starting, and to prevent the occurrence of abnormality at the time of steady state. Thereby, the preventive maintenance of the power generation facility can be further promoted.

  Further, in the remote monitoring system of the present invention, the timing for collecting short-cycle data is limited to a short period of time, that is, at the time of start-up, not during a steady state. Therefore, it can be suppressed that the data amount becomes enormous and the data capacity of the remote monitoring center is pressed. As a result, data can be efficiently collected to detect an abnormality in the power generation facility and its sign with high accuracy, and preventive maintenance of the power generation facility can be sufficiently achieved.

  As described above, according to the present invention, by collecting data at the time of starting intensively, it is possible to quickly and appropriately detect abnormalities in operating conditions and signs thereof, and to sufficiently prevent preventive maintenance. A remote monitoring system can be provided.

Explanatory drawing which shows the structure of the remote monitoring system in an Example. Explanatory drawing which shows the relationship between time, an engine speed, and a power generation output in an Example.

In the present invention, the monitoring terminal can be configured by a so-called sequencer, programmable logic controller (PLC), computer, or the like that includes an input / output point, a central processing unit, a storage device, and the like.
The remote monitoring center can be constituted by a so-called computer or the like provided with input / output points, a central processing unit, a storage device and the like.
As the communication line connecting the monitoring terminal and the remote monitoring center, the Internet, a local area network, a dedicated line, a telephone line, or the like can be used.

  In addition, in the remote monitoring system for the power generation facility, regarding the collection time interval of the start-up operation data and the steady operation data, abnormalities and signs of the operation state of the power generation facility are detected promptly and appropriately, and preventive maintenance is sufficiently performed. Therefore, an optimal collection time interval may be set according to the type of power generation equipment, operating conditions, and the like.

In addition, the remote monitoring center is preferably configured to analyze a predetermined monitoring target item in the start-up operation data and determine whether there is an abnormality in the power generation facility and its sign based on the analysis result. (Claim 2).
In this case, according to the type, configuration, etc. of the power generation facility, by analyzing the monitoring target item necessary for abnormality detection in the start-up operation data, the abnormality and the sign in the power generation facility can be further analyzed. It can be detected more effectively.

The power generation facility is a cogeneration system including a prime mover and a power generator driven by the prime mover, and the prime mover is preferably an engine or a turbine.
The cogeneration system using the prime mover as an engine or turbine has a very large influence when trouble occurs because of the nature of energy supply equipment. Therefore, it is very effective to apply the remote monitoring system of the present invention and to maintain normal operation by preventive maintenance.

The starting operation period is preferably a period from when the prime mover starts operation until the revolution of the prime mover reaches a rated rotational speed.
In this case, the abnormality detection of the power generation facility, which was difficult from the steady operation data, can be performed more effectively, and can be used for preventive maintenance of the power generation facility.

In addition, the prime mover includes a start assist device that assists the operation from the start to a predetermined speed, and the monitoring target item of the start operation data is that the prime mover starts the start during the start operation period. It is preferable that the number of revolutions of the prime mover and the start assist device immediately before shifting to a self-sustained operation without assistance from the assist device (Claim 5).
Usually, the rotational speed of the prime mover immediately before the prime mover shifts to the self-sustained operation is the same as the rotational speed of the start assist device, and the rotational speed is determined by the ability of the start assist device. Therefore, when any abnormality or deterioration in performance occurs in the start assist device, the rotational speed is reduced. Therefore, by observing the rotational speeds of the prime mover and the start assist device, it is possible to detect the occurrence of abnormality and the degree of deterioration of the start assist device.
An electric motor, a hydraulic device or the like can be used as the start assist device.

The prime mover is a multi-cylinder engine having a plurality of cylinders, and the monitoring target item of the starting operation data is preferably an outlet exhaust temperature of each cylinder of the engine during the starting operation period ( Claim 6).
When the exhaust gas temperature at the outlet of the cylinder rises or falls, some abnormality often occurs in the combustion of the cylinder. For example, an abnormality such as a spark plug or a fuel injection valve can be considered. However, since the engine is warmed in the steady operation state, even if there is an abnormality in the spark plug, the fuel injection valve, etc., the effect is unlikely to appear in the outlet exhaust temperature of the cylinder. On the other hand, in the start-up operation period, since the engine is operated from a cold state, combustion abnormality often occurs and directly causes trouble. Therefore, by observing the transition of the outlet exhaust temperature of each cylinder of the engine, it is possible to detect an abnormality in the peripheral portion of each cylinder of the engine and its sign which cannot be confirmed in the steady operation state.

The prime mover is a gas turbine, and the monitoring target item of the start operation data is the rotation speed of the gas turbine in a specific rotation speed range where the vibration value of the gas turbine is maximum during the start operation period or The vibration value is preferred (claim 7).
When a gas turbine is used as the prime mover, there may be a phenomenon in which the vibration generated in the gas turbine becomes the largest in a specific rotational speed range in the middle of the starting operation period. Since this rotation speed range is a rotation speed unique to the gas turbine, the same phenomenon is observed every time the engine is started. Therefore, by detecting the rotation speed or vibration value of the gas turbine in a specific rotation speed range where the vibration value of the gas turbine becomes maximum during the start-up operation period, the abnormality and the sign of the gas turbine are detected. Can do.

The start operation period is preferably a period from when the prime mover starts operation until the amount of power transmitted by the generator reaches a rated power output (claim 8).
In this case, the abnormality detection of the power generation facility, which was difficult from the steady operation data, can be performed more effectively, and can be used for preventive maintenance of the power generation facility.

The monitoring target item of the starting operation data is preferably a rate of increase per unit time of the power generation output of the generator during the starting operation period.
In the start-up operation period, the power generation output is increased until the generator reaches a predetermined power generation output. The rate of increase in the power generation output is determined by the output increase command to the power generation equipment and is basically constant. Therefore, by observing the rate of increase of the power generation output of the generator per unit time during the start-up operation period, it is possible to detect abnormality of the power generation facility and its sign.
Further, the power generation facility is designed to be most stable in the steady operation state. Therefore, in a state where the power generation output of the generator is rising during the start-up operation period, the degree of deterioration of the parts constituting the power generation facility is more likely to appear than in the steady operation state, and abnormality and signs thereof are detected. Easy to do. Therefore, the above effect can be exhibited particularly effectively.

Moreover, it is preferable that the said power generation equipment is a cogeneration system provided with the generator, and the said generator is a fuel cell (Claim 10).
The cogeneration system that uses the prime mover as a fuel cell has a very large influence when trouble occurs because of the nature of energy supply equipment. Therefore, it is effective to maintain normal operation by preventive maintenance using the remote monitoring system of the present invention.

The start operation period is preferably a period from when the generator starts operation until the amount of power transmitted by the generator reaches a rated power output (claim 11).
In this case, the abnormality detection of the power generation facility, which was difficult from the steady operation data, can be performed more effectively, and can be used for preventive maintenance of the power generation facility.

The monitoring target item of the starting operation data is preferably a rate of increase per unit time of the power generation output of the generator during the starting operation period (claim 12).
As described above, by observing the increase rate per unit time of the power generation output of the generator during the start-up operation period, it is possible to detect and easily detect the abnormality of the power generation facility and its sign.

A power generation facility remote monitoring system according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the remote monitoring system 1 of this example remotely monitors the operation state of a stationary power generation facility 2 and performs preventive maintenance. The remote monitoring system 1 is installed in the vicinity of the power generation facility 2 and The monitoring terminal 4 that collects the operation data is connected to the monitoring terminal 4 via the communication line 81, receives the operation data transmitted from the monitoring terminal 4, and has an abnormality in the power generation facility 2 based on the operation data. A remote monitoring center 5 for performing diagnosis.
Then, the monitoring terminal 4 collects start operation data that is operation data for a preset start operation period in the power generation facility 2 and collects steady operation data that is operation data in a steady operation state after the start operation period. It is configured to collect at a shorter collection time interval T1 (<T2).
This will be described in detail below.

As shown in FIG. 1, the power generation facility 2 is a cogeneration system including a gas engine (prime mover) 21 and a generator 22 driven by the gas engine 21.
The cogeneration system of this example is a system that generates power by driving the generator 22 by the output of the gas engine 21 and uses the exhaust heat of cooling water and exhaust gas from the operation of the gas engine 21 for air conditioning and hot water heaters. is there.

Further, in the power generation facility 2, the gas engine 21 is a multi-cylinder engine having a plurality of cylinders (cylinders), and includes a start assist device 211 that assists the operation from the start to a predetermined number of revolutions. .
Further, in the power generation facility 2, devices such as the gas engine 21 and the generator 22 are provided with measuring instruments (not shown) that measure operation data of each device.

  As shown in the figure, a control panel 3 and a monitoring terminal 4 are installed in the vicinity of the power generation facility 2. The control panel 3 is connected to devices such as the gas engine 21 and the generator 22 in the power generation facility 2 via the communication line 81, and is configured to receive various operation data from the measuring instrument of each device. Yes. The monitoring terminal 4 is connected to the control panel 3 via the communication line 81 and is configured to receive and collect operation data from the control panel 3.

  The monitoring terminal 4 is connected to the remote monitoring center 5 via a communication line 81 (communication network 80). The remote monitoring center 5 is configured to receive the operation data transmitted from the monitoring terminal 4, collect and store the operation data in the server 51, and further analyze the operation data. In addition, the remote monitoring center 5 is configured such that operation data collected, stored, and analyzed by the server 51 can be viewed on the monitoring personal computer 52.

In the remote monitoring system 1 of this example, the monitoring terminal 4 collects start operation data that is operation data during a preset start operation period, and steady operation data that is operation data in a steady operation state after the start operation period. The collection time interval T1 (<T2) is shorter than the collection time interval T2 to be collected.
In this example, the starting operation period is a period from when the gas engine 21 starts to operate until the rotation of the gas engine 21 reaches the rated rotational speed (time P0 to P1 in FIG. 2 described later).

In addition, the remote monitoring center 5 is configured to analyze predetermined monitoring target items in the start-up operation data and to determine whether there is an abnormality in the power generation facility 2 and its sign based on the analysis result.
In this example, the monitoring target items of the start operation data are the rotational speeds of the gas engine 21 and the start assist device 211 immediately before the gas engine 21 shifts to the self-sustaining operation without receiving the assist of the start assist device 211 in the start operation period, The exhaust temperature at the outlet of each cylinder of the gas engine 21 during the start-up operation period.

  The remote monitoring center 5 analyzes not only the start operation period but also predetermined monitoring target items in the steady operation data in the steady operation state (time P1 in FIG. 2 described later), and generates power based on the analysis result. It is comprised so that the presence or absence of the abnormality in the installation 2 and its sign may be determined.

Next, a specific example of remotely monitoring the operating state of the power generation facility 2 using the remote monitoring system 1 of this example will be described with reference to FIGS. 1 and 2.
FIG. 2 shows the relationship between the time, the engine speed of the gas engine 21, and the power generation output of the generator 22. In the figure, the change of the engine speed of the gas engine 21 is shown as a graph a, and the change of the power generation output of the generator 22 is shown as a graph b.

First, the operation of the power generation facility (cogeneration system) 2 is started. Specifically, the operation of the gas engine 21 which is a prime mover is started, and the rotation speed is increased. The operation of the power generation facility 2 is performed manually or according to a time schedule.
As shown in FIG. 2, the gas engine 21 is operated while being assisted by the start assist device 211 from the time of start (time P0) until reaching the predetermined rotation speed F1.

When the operation of the gas engine 21 is started, the monitoring terminal 4 transmits the operation data of each device such as the gas engine 21 and the generator 22 from the measuring device of each device through the control panel 3 at a constant collection time interval T1. Receive and collect the operation data. The collection time interval T1 in this example is 1 second. Then, the monitoring terminal 4 transmits the received operation data to the remote monitoring center 5.
On the other hand, the remote monitoring center 5 receives the operation data transmitted from the monitoring terminal 4 at the server 51 and stores the operation data in a database in the server 51.

Next, as shown in FIG. 2, when the gas engine 21 reaches the rotation speed F <b> 1, the gas engine 21 shifts to a self-supporting operation that does not receive assistance from the start assist device 211. Then, the gas engine 21 further increases the rotational speed and reaches the rated rotational speed F2. In this example, a period (time P0 to P1) from when the gas engine 21 starts operation until the rotation of the gas engine 21 reaches the rated rotational speed F2 is set as a start operation period.
When the rotation of the gas engine 21 reaches the rated rotational speed F2 and enters a steady operation state, the monitoring terminal 4 thereafter receives the operation data at a certain collection time interval T2 and collects the operation data. To do. The collection time interval T2 in this example is 60 seconds.

On the other hand, the remote monitoring center 5 stores the operation data in the start operation period (time P0 to P1) stored in the database in the server 51 in the database as one start operation data. Then, the monitoring control item of the starting operation data is analyzed by a program (abnormality detection logic) previously incorporated in the database.
As described above, the items to be monitored in this example are the rotational speed and start of the gas engine 21 and the start assist device 211 immediately before the gas engine 21 shifts to the self-sustaining operation without being supported by the start assist device 211 during the start operation period. The exhaust temperature at the outlet of each cylinder of the gas engine 21 during the operation period.

Next, the remote monitoring center 5 stores the analysis result (numerical value) output by each abnormality detection logic in a database. Then, by determining the upper and lower limits of the analysis results, comparing with the analysis results so far, etc., it is determined whether there is an abnormality in the power generation facility 2 and the presence or absence of the signs with respect to the analysis results output from the current startup operation data. To do.
The manager or the like browses the analysis result of the start operation data and the abnormality determination result on the monitoring personal computer 52, and responds by viewing this. For example, when an abnormality and its sign are detected, it may be notified to an administrator or the like (for example, a warning popup is displayed on an email or a monitoring screen).

Further, in the steady operation state (time P1 to P1) after the start operation period, the monitoring terminal 4 receives the operation data at a certain collection time interval T2, collects the operation data, and transmits it to the remote monitoring center 5. . On the other hand, the remote monitoring center 5 analyzes data based on the operation data (steady operation data), and determines whether there is an abnormality in the power generation facility 2 and its sign in the steady operation state.
That is, the remote monitoring system 1 of the present example always performs remote monitoring of the operation state after the operation of the power generation facility 2 is started in this way.

Next, the effect in the remote monitoring system 1 of this example is demonstrated.
As shown in FIGS. 1 and 2, the remote monitoring system 1 of this example includes a monitoring terminal 4 that collects operation data of the power generation facility 2, a remote monitoring center 5 that performs abnormality diagnosis of the power generation facility 2 based on the operation data, Have Then, the monitoring terminal 4 collects start operation data for the start operation period (time P0 to P1), and a collection time interval T1 that is shorter than the collection time interval T2 for collecting the subsequent steady operation data for the normal operation state (time P1). (<T2). As a result, abnormalities in operating conditions and signs thereof can be detected quickly and appropriately, and preventive maintenance can be sufficiently achieved.

In other words, the normal collection data that is normally collected alone has a rough data collection time interval, and it is impossible to realize highly accurate data analysis and preventive maintenance. In addition, it is difficult to grasp the operating state at the time of starting that moves excessively, and it is difficult to detect an abnormality that occurs at the time of starting and its signs.
Therefore, in the remote monitoring system 1 of this example, when the power generation facility 2 is started, data is collected at a cycle shorter than the cycle collected at the normal time so that detailed data at the start can be obtained.

  For this reason, it is possible to detect abnormalities and signs of the power generation facility 2 starting from the starting operation data, which is difficult from the steady operation data. In particular, by collecting the excessive data at the time of starting finely, it is possible to grasp the operating state at the time of starting in more detail, and it is possible to realize highly accurate abnormality detection. Thereby, the abnormality at the time of starting of the power generation equipment 2 and its sign can be detected promptly and appropriately, and preventive maintenance can be achieved by preventing a failure in advance.

  Further, it is possible to obtain the effect of preventing abnormalities that occur in the steady state by collecting the data at the start in detail and sufficiently grasping the operation state at the start. In other words, some of the abnormalities that occur during steady state may be seen during startup. Therefore, according to the remote monitoring system 1 of the present example, it is possible to detect signs of abnormality that occur at the time of steady state from the data at the time of starting, and to prevent occurrence of abnormality at the time of steady state. Thereby, the preventive maintenance of the power generation facility 2 can be further promoted.

  Moreover, in the remote monitoring system 1 of this example, the timing for collecting short-cycle data is limited to a short period of time, that is, a start time, not a steady time. Therefore, it can be suppressed that the amount of data becomes enormous and the data capacity of the remote monitoring center 5 is compressed. Thereby, data can be collected efficiently, the abnormality in the power generation facility 2 and its sign can be detected with high accuracy, and preventive maintenance of the power generation facility 2 can be sufficiently achieved.

  Further, in this example, the remote monitoring center 5 is configured to analyze a predetermined monitoring target item in the starting operation data and determine the presence or absence of an abnormality in the power generation facility 2 and its sign based on the analysis result. . Therefore, according to the type, configuration, etc. of the power generation facility 2, by analyzing the monitoring target items necessary for abnormality detection in the start-up operation data, it is possible to detect the abnormality in the power generation facility 2 and its signs more effectively. can do.

  The power generation facility 2 is a cogeneration system including a gas engine 21 and a generator 22 driven by the gas engine 21. The cogeneration system using the prime mover as the gas engine 21 has a very large influence when trouble occurs because of the nature of the energy supply facility. Therefore, it is very effective to apply the remote monitoring system 1 of this example and to maintain normal operation by preventive maintenance.

  The start operation period is a period (time P0 to P1) from when the gas engine 21 starts operation until the rotation of the gas engine 21 reaches the rated rotation speed F2. Therefore, the abnormality detection of the power generation facility 2 that is difficult from the steady operation data can be performed more effectively, and can be used for preventive maintenance of the power generation facility 2.

  Further, the gas engine 21 as a prime mover includes a start assist device 211 that assists the operation from the start to the time when the engine reaches a predetermined rotation speed F1. The monitoring target item of the start operation data is the rotation speed of the gas engine 21 and the start assist device 211 immediately before the gas engine 21 shifts to the self-sustained operation without being supported by the start assist device 211 in the start operation period. That is, normally, the rotation speed of the gas engine 21 immediately before the gas engine 21 shifts to the self-sustaining operation is the same as the rotation speed of the start assist device 211, and the rotation speed is determined by the ability of the start assist device 211. For this reason, when some abnormality or deterioration in performance occurs in the start assist device 211, the rotational speed of the start assist device 211 decreases. Therefore, by observing the rotational speeds of the gas engine 21 and the start assist device 211, it is possible to detect the occurrence of abnormality and the degree of deterioration of the start assist device 211.

  The gas engine 21 as a prime mover is a multi-cylinder engine having a plurality of cylinders. The monitored item of the start operation data is the outlet exhaust temperature of each cylinder of the gas engine 21 during the start operation period. That is, when the exhaust gas temperature at the outlet of the cylinder rises or falls, there are many abnormalities in the combustion of the cylinder. For example, abnormalities such as spark plugs and fuel injection valves can be considered. However, since the engine is warm in the steady operation state, even if there is an abnormality in the spark plug, the fuel injection valve, etc., the effect is unlikely to appear in the outlet exhaust temperature. On the other hand, in the start-up operation period, since the engine is operated from a cold state, combustion abnormality often occurs and causes trouble. Therefore, by observing the transition of the outlet exhaust temperature of each cylinder of the gas engine 21, it is possible to detect an abnormality and its sign in the periphery of each cylinder of the gas engine 21 that cannot be confirmed in the steady operation state.

  Thus, the remote monitoring system 1 of this example collects the data at the time of starting of the power generation equipment 2 intensively, thereby quickly and appropriately detecting abnormalities and signs of the operation state of the power generation equipment 2 and preventing them. Sufficient conservation can be achieved.

In this example, as shown in FIG. 2, the starting operation period is a period from the start of operation of the gas engine 21 as the prime mover until the rotation of the gas engine 21 reaches the rated rotational speed F2 (time P0 to P1). However, for example, the period (time P0 to P2) from when the gas engine 21 as the prime mover starts operation until the power transmission amount of the generator 22 reaches the rated power generation output G1 may be set.
At this time, for example, by setting the monitoring target item in the start operation period to the rate of increase of the power generation output of the generator 22 per unit time, it is possible to easily detect an abnormality in the operating state of the power generation facility 2 and its signs. .

1 Remote monitoring system 2 Power generation equipment 4 Monitoring terminal 5 Remote monitoring center 81 Communication line

Claims (12)

In a remote monitoring system for power generation facilities that performs preventive maintenance by remotely monitoring the operating state of stationary power generation facilities,
A monitoring terminal installed in the vicinity of the power generation facility and collecting operation data of the power generation facility;
A remote monitoring center that is connected to the monitoring terminal via a communication line, receives the operation data transmitted from the monitoring terminal, and performs an abnormality diagnosis of the power generation facility based on the operation data; ,
The monitoring terminal is configured to collect start-up operation data that is operation data during a preset start-up operation period in the power generation facility more than a collection time interval that collects normal operation data that is operation data in a normal operation state after the start-up operation period. A remote monitoring system for a power generation facility, characterized by being collected at a short collection time interval.   In Claim 1, the said remote monitoring center is comprised so that the presence or absence of the abnormality in the said power generation equipment and its sign may be determined based on the analysis result while analyzing the predetermined | prescribed monitoring object item in the said starting operation data. A remote monitoring system for power generation equipment.   3. The remote monitoring of a power generation facility according to claim 1 or 2, wherein the power generation facility is a cogeneration system including a prime mover and a generator driven by the prime mover, and the prime mover is an engine or a turbine. system.   4. The power generation facility remote monitoring system according to claim 3, wherein the starting operation period is a period from when the prime mover starts operation until the revolution of the prime mover reaches a rated rotational speed. In Claim 4, the prime mover includes a start assist device that assists the operation from the start to a predetermined number of revolutions.
The monitoring target item of the start operation data is the number of rotations of the prime mover and the start assist device immediately before the prime mover shifts to the self-sustained operation without assistance from the start assist device during the start operation period. A remote monitoring system for power generation facilities. In Claim 4, the prime mover is a multi-cylinder engine having a plurality of cylinders,
The remote monitoring system for power generation equipment, wherein the monitoring target item of the starting operation data is an outlet exhaust temperature of each cylinder of the engine during the starting operation period. In Claim 4, the prime mover is a gas turbine,
The monitoring target item of the starting operation data is the rotation speed or vibration value of the gas turbine in a specific rotation speed range where the vibration value of the gas turbine is maximized during the starting operation period. Remote monitoring system.   The power generation facility remote monitoring system according to claim 3, wherein the start operation period is a period from when the prime mover starts operation until a power transmission amount of the generator reaches a rated power output.   9. The remote monitoring system for a power generation facility according to claim 8, wherein the monitoring target item of the start operation data is a rate of increase per unit time of the power generation output of the generator during the start operation period.   The power generation facility remote monitoring system according to claim 1 or 2, wherein the power generation facility is a cogeneration system including a generator, and the generator is a fuel cell.   The power generation facility remote monitoring system according to claim 10, wherein the start operation period is a period from when the generator starts operation until a power transmission amount of the generator reaches a rated power output.   12. The remote monitoring system for power generation equipment according to claim 11, wherein the monitoring target item of the start operation data is a rate of increase per unit time of the power generation output of the generator during the start operation period.

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