JPS635975B2 - - Google Patents

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 its problems] Recently, combined cycle power generation units have been developed and put into practical use for the purpose of improving power generation efficiency.
This power generation unit combines a gas turbine and a steam turbine, and uses the exhaust gas that has driven 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, one power generation plant is composed of multiple units in terms of system operation.

In this way, in 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 generating units have an accident at almost the same time, it is important to know the order in which each power generating unit causes an accident in order to analyze the accident. It is necessary to detect and collect the information that occurs during accidents with a resolution of about 1/100 second, and print out the information in the order of occurrence with the time stamp attached. For this purpose, an accident analysis information output device is installed.

However, since each power generation unit is installed at a considerable distance, connecting all of the accident information detectors installed in each unit to the accident analysis information output device described above requires an enormous number of cables. Therefore, it is not suitable for practical use. On the other hand, it is conceivable to install a clock in each unit and send the accident information with the time stamp to the above-mentioned accident analysis information output device, and then refer to the attached time and rearrange the accidents in the order of occurrence. , it is necessary to always maintain the synchronization of all clocks provided for each unit, which makes clock management complicated.

[Object of the Invention] In view of the above 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] For this reason, the present invention connects the accident analysis information output device and the accident information collection device of each power generation unit by a transmission device, and further provides an interrupt input means in the accident analysis information output device to Connect to the power generation unit,
When an accident occurs in the power generation unit, it is transmitted to the accident analysis information output device via the interrupt input means, and the accident information collection device also transmits a large amount of accident information with the time of occurrence added to it via the transmission device. 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 accident notification is sent via the transmission device. The system is characterized in that the time of occurrence of the accident information that comes 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; A data way station and a data way transmission line for transmitting data to the accident analysis information output device 1, 6 an accident information collection device for collecting data on accidents occurring in the power generation unit, and 7 an interrupt input means for transmitting the occurrence of an accident. A transmission line for interrupt input for notification; 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; 9 is a process input device with an interrupt function for detecting changes in the status of multiple inputs of the power generation unit; 10 is a power generation unit.

FIG. 2 shows a specific configuration diagram of the accident analysis information output device 1, in which 21 is an accident time storage means for storing the time of accident occurrence based on an interrupt notification from the interrupt input means 3; A unit determination/time addition means 23 is for determining the unit of accident data sent from the information collection device 6 and adding the accident time. Accident information analysis means; 24 is a timing device for measuring the time of the accident analysis information output device 1; 25 is an accident information receiving means for receiving accident data sent from the accident information collection device 6; 26 is an accident analysis device. This is an accident analysis information output means for outputting information.

FIG. 3 shows a specific configuration diagram of the accident information collection device 6, in which 31 is an accident information transmitting means for transmitting accident data to the accident analysis information output device 1, and 32 is a means for temporarily storing 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 timer for measuring the time of the accident information collection device 6. It is a 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 sent to the accident information collection device 6 via the process input device 8 with interrupt.
At the same time, the change in state is detected by the accident state change detection device 9 and is also notified to the accident analysis information output device 1 via the interrupt input means 3 at the same time.

The accident information input means 33 inputs the interrupt point identification number and status from the process input device 8 with an interrupt function, and generates an interrupt for each point. The time is read from the clock device 34 and added.

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 After the interruption occurs, when no interruption occurs for a certain period of time, a series of interruption data is sent to the accident analysis information output device 1 via the dataway station 4 and the dataway transmission line 5 using the accident information transmission means 31. Transmit.

On the other hand, the accident analysis information output device 1 receives the occurrence of an accident by an interrupt from the interrupt input means 3, and
Accident time storage means 21 stores the time of 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 is determined by the unit determination/time addition means 22, it is stored in the accident time storage means 21. The time of all accident data is corrected to the time that is being clocked to the accident analysis information output device 1 using the time that has been set. The time-adjusted accident data is arranged in order of occurrence time by the accident information analysis means 23 and then outputted to the printing device 2 by the accident information output means 26.

For example, consider a case where an accident occurs in the Mth unit, and as a result, an accident also occurs in the Nth unit. At this time, the relationship between the first interrupt that occurs in each of the M-th unit and the N-th unit and the interrupt occurrence time is determined by the time measured by the time measurement device of the accident analysis information output device 1 and the time measured by the M-th unit accident information collection device 6. The time measured by the device and the time measured by the clock device of the Nth unit accident information collection device 6 are expressed in a timing chart as shown in FIG. 4.

That is, in FIG. 4, numeral 41 is a time series produced by the clock device 24 of the accident analysis information output device 1, 42 is a time series produced by the clock device of the M-th unit accident information collection device, and 43 is the time series measured by the N-th unit accident information collection device. Shows the time sequence by the device. Further, 44 and 45 indicate accident occurrence interrupt inputs at the M-th and N-th 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 each accident in the M-th unit and the N-th unit is determined by the timing device of the accident information collection device 6 of each unit. The accident occurrence time of the M-th unit, where the accident occurred first, is 0.010 (47 in the figure), while the accident occurrence time of the N-th unit, where the accident occurred later, is 0.005.
(49 in the figure) may occur. If this time is used, the accident occurrence time of the N-th unit, where the accident occurred later, will be an earlier time, and the incorrect data will appear as if the accident at the M-th unit occurred due to the influence of the accident that occurred at the N-th unit. You will get .

However, in the case of this embodiment, since the time measured by the timing device of the accident analysis information output device 1 is added to the time of occurrence of the accident that occurred in all the units as described above, the time when the accident occurred in the M-th unit is added. The rabbit time is 0.020 (46 in the figure), and the time of accident occurrence in the Nth unit is 0.025 (48 in the figure), so we can correctly know that the accident occurred first in the Mth unit. .

In the above embodiment, as an accident notification device, the accident state change detection device 9 is used to convert all input points that change due to an accident into one interrupt, and the accident analysis information is transmitted via the interrupt 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 shatter, etc.), so the state change is detected. Some of the major input points that change state first among all the input points of each power generation unit (for example, a turbine trip signal, a generator or disconnection open signal, etc.) are used as input points for , an interrupt notification of the occurrence of an accident may be provided by directly connecting one or more main input points in parallel to the interrupt input means 3. In this case, it goes without saying that the input point from each power generation unit to the interrupt input means 3 must 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.

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

[Effects of the Invention] As described above, according to the present invention, with a simple configuration,
It is possible to accurately know the context of accidents that occur almost simultaneously in multiple power generation units, which allows for accurate accident analysis.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a combined cycle power plant accident analysis device showing an embodiment of the present invention, FIG. 2 is a detailed block diagram of the accident analysis information output device of FIG. 1, and FIG.
Detailed configuration diagram of the accident information collection device shown in Figure 4.
This is a timing diagram of accidents that occurred at almost the same time in two power generation 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... Interrupt input transmission line, 8... Process input device, 9... Accident situation change detection device, 10 ...Power generation unit.

Claims (1)

[Claims] 1 Each accident information collection device that collects and outputs accident information of each power generation unit in a combined power generation plant consisting of multiple power generation units, and outputs the accident information with a time stamp, and the accident information output from each of these accident information collection devices. A transmission device that transmits data, each accident notification device that detects and notifies that an accident has occurred in each power generation unit, and receives notification information from each of these notification devices via an interrupt means, and based on the time at that time, A combined power generation plant comprising an accident analysis information output device that corrects the time of accident information sent from each of the accident information collection devices via a transmission device, and prints out the information arranged in the corrected time order. Accident analysis device.