JPS60125134A - Composite generating plant defect analyzer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an accident analysis device for outputting accident analysis information for a combined power generation plant consisting of a plurality of power generation units.[Technical Background of the Invention and Problems Therewith] Recently, combined cycle power generation units have been developed and put into practical use with the aim of improving power generation efficiency.

This power generation unit combines a gas turbine and a steam turbine, and uses the exhaust gas that has been used to drive the gas turbine to drive the steam turbine, thereby making effective use of thermal energy. However, since this power generation unit has a small single unit capacity, it is difficult to operate the system by using multiple units.
Two power plants will be constructed.

In such a combined power generation plant consisting of a plurality of power generation units, if one power generation unit causes an accident for some reason, other power generation units may also be affected by the accident. Therefore, when multiple power generation units have an accident at almost the same time, it is important to know the order in which each power generation unit has caused an accident in order to analyze the accident. It is necessary to detect and collect information that occurs during accidents at a resolution of about 1/100 second, and to print out the information in the order of occurrence with a time stamp attached to it. For this purpose, an accident analysis information output device is provided.

However, since each power generation unit is installed quite far apart, connecting all of the accident information detectors installed in each unit to the accident analysis information output device described above requires a huge number of cables. and is not suitable for practical use. On the other hand, a clock is installed in each unit, and the accident information with the time stamp is sent to the above-mentioned accident analysis information output device.
It is conceivable to rearrange the clocks in the order of occurrence by referring to the times recorded in the clock, but this requires always maintaining the synchronization of all the clocks provided for each unit, which makes clock management complicated.

[Object of the Invention] In view of the above-mentioned points, the present invention provides a combined power plant accident analysis that can accurately arrange and output accident information that occurred almost simultaneously in multiple power generation units in the order of occurrence with a simple configuration. The purpose is to provide equipment.

[Summary of the Invention] Therefore, one aspect of the present invention is to connect an accident analysis information output device and an accident information collection device of each power generation unit by a transmission device, and further provide an interrupt input means in the accident analysis information output device so that each When an accident occurs in the power generation unit, it is connected to the power generation unit, and when an accident occurs in the power generation unit, it is transmitted to the accident analysis information output device through the interrupt input means, and the occurrence time is added from the accident information analysis means through the transmission device. It is transmitted along with a large amount of accident information to the accident analysis information output device, and the accident analysis information output device uses a built-in timing device to know the time of the accident notification transmitted via the interrupt input means, and based on this time, the transmission device The system is characterized in that the time of occurrence of the accident information sent via the system is corrected to the time of the above clock, and then outputted in the order of the time of occurrence.

[Embodiments of the invention] The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 shows a block configuration diagram of a combined cycle power plant accident analysis device according to an embodiment of the present invention, in which 1 is an accident analysis information output device that outputs accident analysis information that occurred in a combined power plant, and 2 is an accident analysis information output device. 3 is a printing device for printing out the accident analysis results; 3 is an interrupt input means for notifying the accident analysis information output device 1 of an accident that occurred in the power generation unit; 4 and 5 are data collected by the accident information collection device 6; 6 is a data way station and a data way transmission line for transmitting data to the accident analysis information output device 1; 6 is an accident information collection device for collecting data on accidents occurring in the power generation unit;
7 is a transmission line for interrupt input for notifying the interrupt input means of the occurrence of an accident; 8 is a process input device with an interrupt function for inputting the status of the power generation unit to the accident information collection device 6;
Reference numeral 9 designates an accident condition change detection device for detecting state changes of a plurality of inputs of the power generation unit and notifying the interrupt input means based on a logical sum; 10 designates a power generation unit.

FIG. 2 shows a specific configuration diagram of the accident analysis information output device 1, in which reference numeral 21 denotes an accident time storage means for storing the accident occurrence time based on an interrupt notification from the interrupt input means 3;
23 is a unit determination/time addition means for determining the unit of accident data sent from the accident information collection group W6 and adding an accident time, and 23 is for arranging the accident data in the order of occurrence or organizing them by related data. 24 is a timing device for measuring the time of the accident analysis information output device 1; 25 is an accident information receiving device for receiving accident data sent from the accident information collection device 6; This is an accident analysis information output means for outputting accident M new information.

FIG. 3 shows a specific configuration diagram of the accident information collection device 6, in which 31 is an accident information transmission means for transmitting accident data to accident analysis information output @ 1, and 32 is a temporary storage of accident data. 33 is an accident information input means for inputting accident information of the power generation unit via the process input device 8 with an interrupt function; 34 is a data storage means for measuring the time of the accident information collection device 6; It is a timing device.

Figure 4 illustrates the timing of accidents that occurred almost simultaneously in two power generation units.

With the above configuration, if an accident occurs in the power generation unit 10 for some reason, the state change signal is notified to the accident information collection device 6 via the process input device 8 with interrupt, and the accident state change detection device 9 A state change is detected and simultaneously notified to the accident analysis information output device 1 via the 1-interrupt input means 3.

The accident information input means 33 is a process input device 8 with an interrupt function.
In response to an interrupt from , the interrupt point identification number and state are input from the process input device 8 with an interrupt function, and the time at which the interrupt occurred is read from the time pull device 34 and added to each point.

Normally, interruptions due to changes in the state of a plant accident occur consecutively at multiple points, so the accident information collection device 6 temporarily stores the continuously occurring interruption information in the data storage means 32, and occurs, and when no interrupts occur for a certain period of time.

A series of interrupt data is transmitted to the accident analysis information output device 1 using the accident information transmission means 31 via the data way transmission line 4 and the data way transmission line 5 6 On the other hand, the accident analysis information output device 1 The occurrence of the accident is received by the interrupt input means 3, and the accident time storage means 21 stores the time of the clock device 24 as the accident occurrence time. Thereafter, the accident data transmitted from the accident information collection device 6 is received by the accident information receiving means 25, and after the unit judgment/time addition means 22 performs unit judgment, the accident data is stored by the accident time storage means 2I. Using this time, the time of all accident data is corrected to the time measured by the accident analysis information output device 1. The time-corrected accident data is arranged in the order of occurrence time by the accident information receiving means 23, and then outputted to the printing device 2 by the accident information outputting means 26.

For example, now consider a case where an accident occurs in the Nth unit, and as a result, an accident also occurs in the Nth unit. At this time, the accident analysis information output device 1 calculates the relationship between the first interrupt that occurs in each of the N-th unit and the interrupt occurrence time.
A timing chart of the time measured by the clock device L6, the time clocked by the N-unit accident information collection device 6, and the time clocked by the N-unit accident information collection device L6 is shown in FIG. .

That is, in FIG. 4, 41 is the accident analysis information output device 1.
Reference numeral 42 indicates a time series based on the timekeeping device 24 of the N-th unit accident information collection device, and 43 indicates a time series based on the timekeeping device of the N-th unit accident information collection device.

Further, 44.45 indicates the accident occurrence interrupt input in the M and Nth units. In this figure, in the conventional system without a timing device of the accident analysis information output device 1, the time of occurrence of the accident in the Nth unit and each of the Nth units is determined by the timing device of the accident information collection device 6 of each unit. The accident occurrence time of the No. 1 unit, where the accident occurred first, is O3θ10 (47 in the same figure), while the accident occurrence time of the Nth unit, where the accident occurred later, is 0.005 (49 in the same figure). It may happen. If this time is used, the accident occurrence time of the Nth unit, which occurred later, will be an earlier time, and it will be as if the accident occurred in the Nth unit due to the influence of the accident that occurred in the Nth unit. You will get .

However, in the case of this embodiment, as mentioned above, the time determined by the timing device in the accident analysis information output bag [1] is added to the time of occurrence of an accident that occurred in all units. The time of accident occurrence is 0.020 (46 in the same figure)
On the other hand, the accident occurrence time of the Nth unit is 0.02
5 (48 in the figure), it is possible to correctly know that the accident occurred first in the Nth unit.

In the above embodiment, as an accident notification device, the interruption of all input points that change due to an accident is made into one interruption using the accident situation change detection bag w9, and the accident analysis information is transmitted via the interruption input means 3. The input is to the output device 1, but normally when an accident occurs, a continuous change in state occurs (for example, large turbine shaft vibration → main steam valve closed → turbine steam cutoff, etc.), so in order to detect the change in state. Among all the input points of each power generation unit, some of the main input points that change state first are used as the input points of
For example, by using a turbine trip signal, generator breaker open signal, etc.), or by directly connecting one or more main input points in parallel to the interrupt input means 3, an interrupt notification of the occurrence of an accident can be generated. You may also do this. In this case, it goes without saying that the input point from each power generation unit to the interrupt input means 3 needs to be common to all power generation units.

Further, in the above embodiment, a data way is used as the transmission device, but it goes without saying that a data link device or a modem-based transmission device may be used.

Furthermore, it goes without saying that the present invention is applicable not only to multiple power generation units of a combined cycle power plant, but also to multiple conventional power generation units.

[Effect of the invention] As described above, according to the present invention, the configuration is simple.

It is possible to accurately determine the context of accidents that occur almost simultaneously in multiple power generation units, which enables accurate accident analysis.

[Brief explanation of drawings]

Figure 1 is a configuration diagram of a combined cycle power plant accident analysis device showing an embodiment of the present invention, Figure 2 is a detailed configuration diagram of the accident analysis information output device of Figure 1, and Figure 3 is the accident information of Figure 1. Figure 4, which is a detailed configuration diagram of the collection device, is a timing diagram of an accident that occurred almost simultaneously in two power generating units. 1... Accident analysis information output device, 2... Printing device, 3
... Interrupt input means, 4... Data way station, 5... Data way transmission line, 6... Accident information collection device, 7... Transmission line for interrupt input, 8...
Process input device, 9... Accident situation change detection device, 10.
...Power generation unit. Figure 2 1 Figure 3 Figure 4 Figure 1

Claims (1)

[Claims] Each accident information collection device that collects accident information from each power generation unit of a combined power generation plant consisting of multiple power generation units and outputs it with a time stamp, and transmits the accident information output from each accident information collection device. a transmission device that detects and notifies the occurrence of an accident in each power generation unit; and a transmission device that receives notification information from each of these notification devices via an interrupt means, and controls the transmission based on the time at that time. A combined power plant accident characterized by comprising an accident analysis information output device that corrects the time of accident information sent from each of the accident information collection devices via the device, and prints out the information arranged in the corrected time order. Analysis device.