JPH01291116A - History data processing system - Google Patents

Abstract

PURPOSE:To retrieve history data at high speed by providing the means for saving index information which has recorded a principal input state of a plant required for a retrieval, and for retrieving the history data, based on the index information. CONSTITUTION:A retrieval instruction input means 12 reads a retrieval condition from an input device 11, the retrieval condition which is taken out by a retrieval condition taking out means 13 and index information which is taken out by an index fetching means 14 are compared, and whether it is data required for an analysis or not is decided by a retrieval condition deciding means 15. In such a way, when it does not conform to the retrieval condition, the means 14 is allowed to output an instruction for taking out the next index, and the next index is taken out and compared with the retrieval condition. when said result has conformed to the index condition, history data is taken out from a large capacity storage device 6 by a history data taking out means 17 and saved temporarily by an extracted data saving means 18. Accordingly, the decision can be executed by fetching only the index without taking out all the history data from the device 6 of a low speed of an optical disk in order to take out the data conforming to the retrieval condition.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a historical data processing method for processing historical data of a plant.

(Prior Art) Recently, compact, large-capacity data storage devices such as optical disk devices have been introduced, and it has become possible to store a large amount of constantly changing plant state quantities in a short period of time. This saved data is called historical data, and by saving all state quantities related to plant operation, in the event of a sudden accident, the data can be retrieved and analyzed later to help investigate the accident. Very effective.

(Problem to be solved by the invention) However, in the conventional historical data processing method,
When searching for data necessary for analysis from historical data that has been stored for a long time under specific conditions, all of the stored historical data is retrieved in order, and the search conditions are judged to meet the conditions. Searching for historical data was taking a lot of time because it was searching for matching data. Moreover, magnetic tape has traditionally been mainly used to store historical data.
One magnetic tape could only store about 30 MB of data, but recently optical disks have been used to store historical data, and each optical disk can store 4 GB of data.
yte of data can now be stored, approximately 130 times more data than magnetic tape, resulting in a larger data capacity. For this reason, with conventional historical data processing methods, it takes an enormous amount of time to search all the historical data contained on an optical disk, and it is difficult to search and use the necessary data within the required time. The problem was that it became virtually impossible.

[Structure of the invention]

(Means for Solving the Problems) For this reason, the present invention stores index information recording the main human power status of the plant necessary for searching in a high-speed storage device for each piece of historical data stored in a large-capacity storage device. The present invention is characterized in that a means for searching historical data based on the index information is provided, and the historical data can be searched at high speed under the condition of one weight of main personnel of the plant.

(Function) The present invention makes it possible to search for data that meets necessary conditions within an effective time from among historical data that is increasing in volume.

(Example) The present invention will be described below with reference to embodiments shown in the drawings.

FIGS. 1 and 2 are block diagrams of a historical data processing method according to an embodiment of the present invention. FIG. 1 is a block diagram of a method for storing historical data, and FIG. It is a block diagram of the extraction method.

In FIG. 1, reference numeral 1 denotes a plant history data collection means that periodically reads plant state quantities and performs engineering unit conversion and the like to collect them as history data.

Reference numeral 2 denotes a history data storage means for storing history data in a mass storage device such as an optical disk and for determining stored address information.

Reference numeral 3 denotes a history data index information creation means for creating index information by collecting the main plant state quantities of the history data stored by the history data storage means, the storage address of the mass storage device, and the like.

Reference numeral 4 denotes a history data index information storage means for storing the history data index information in a high speed storage device.

Reference numeral 5 denotes a high-speed storage device such as a magnetic disk device for storing the historical data index information.

6 is a large capacity storage device such as an optical disk device for storing a large amount of historical data for a long period of time.

In FIG. 2, 11 is an input device for giving an instruction to search historical data.

Reference numeral 12 denotes an input means for inputting a historical data search instruction.

Reference numeral 13 denotes a search condition extracting means for selecting and extracting search conditions from the instructions inputted by the search instruction inputting means.

Reference numeral 14 denotes index retrieval means for retrieving historical data index information from the high speed storage device.

Reference numeral 15 denotes a search condition determining means for comparing the main plant state quantities contained in the retrieved index information with the search conditions and determining historical data that meets the search conditions.

Reference numeral 16 denotes a history data retrieval instruction means for instructing to retrieve the history data when data matching the search conditions is found.

Reference numeral 17 denotes a history data retrieval means for retrieving history data from the mass storage device.

Reference numeral 18 denotes extracted data storage means for storing extracted history data in a storage device.

Reference numeral 19 denotes a storage device that temporarily stores retrieved history data.

With the above configuration, the history data read by the plant history data collection means 1 is collected by the history data index information creation means 3 to create index information by collecting the main plant state quantities, and the history data is stored by the history data storage means 2. The historical data index information storage means 4 can save the information as an index of the index. On the other hand, when performing data analysis etc., the input device f
The search instruction input means 12 reads the search conditions from f1ll, compares the search conditions retrieved by the search condition retrieval means 13 and the index information retrieved by the index retrieval means 14, and searches whether the data is necessary for analysis. The condition determining means 15 makes the determination. At this time, if the search conditions are not met, the index retrieval means 14 is instructed to retrieve the next index, and the next index is retrieved and compared with the search conditions. If the search conditions are met, the 1M history data retrieval instruction means 16 issues a retrieval instruction, the history data retrieval means 17 retrieves the history data, and the extracted data storage means 18 temporarily stores it.

As an example, a case where performance test analysis data for a thermal power plant is searched will be explained using FIG. 3.

Performance tests on thermal power plants are conducted to investigate changes in the plant over time. The normal test conditions are 1
/4, 2/4, 3/4, 4/4 load bands (2501411,50 for an output 1000M100O plant)
0MV, 750MW, equivalent to 10100O) from 2 to
It will be held for 5 hours.

One of the indicators of plant performance is the generating end thermal efficiency, which is expressed as the ratio of the generated power to the amount of heat retained in the consumed fuel.

7, a: Generating end thermal efficiency (%) Po: Generating power (kwh/h) H: Higher calorific value of fuel (kcaffi/kg) K:
Fuel consumption (kg/h) Now, in order to investigate changes over time in the performance test results in the 4/4 load zone, only the data when the plant output is 10100O are collected at appropriate intervals (for example, 10 minutes) for one year. Let us consider the case where the difference in the net thermal efficiency of power generation is calculated by extracting the

In Fig. 3, the search condition is plant output = ioo
oMw is input, indexes of stored data are sequentially retrieved, and while data matching the search conditions is compared during the search period, only historical data matching the conditions are retrieved.

In this way, by storing the main state quantities of the plant in the index information, in order to retrieve data that matches the search conditions, there is no need to retrieve all historical data from the slow mass storage device of the optical disk. Judgment can be made by extracting only the As a result, when searching a huge amount of data, such as searching for data throughout the year, it is now possible to retrieve data in a few tens of minutes to a few hours, even though it would take several days just to search the data using conventional methods. , it becomes possible to analyze data within the required time.

In this way, in this embodiment, when searching historical data using the main state quantities of the plant as a condition, as described above, it is possible to make a condition determination without retrieving data from a low-speed large-capacity storage device such as an optical disk. , it becomes possible to retrieve data within an optimal period.

Although the above embodiment has been described using a combination of a magnetic disk device and an optical disk device, the same applies to a storage device that will be put into practical use in the future, such as a bubble memory device.

〔Effect of the invention〕

As explained above, according to the present invention, a large amount of plant history data can be retrieved and provided to engineers within an appropriate time, and a data processing device useful for technical work such as calculating plant efficiency can be obtained. It will be done.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a historical data storage method according to an embodiment of the present invention, and FIG. 2 is a block diagram of a historical data search method according to an embodiment of the present invention. FIG. 3 is a flow diagram of the historical data search method. 11... Input device 12... Search instruction input means 13... Search condition extraction means 14... Index extraction means 15... Search determination means 16... History data extraction instruction means 17... History Data retrieval means 18...Extraction storage means 19...Storage device No.
1 Figure/I Figure 2 Figure 3

Claims (1)

[Claims] A plant history data collection means for reading plant state quantities and collecting them as plant history data; a history data storage means for storing the collected history data in a mass storage device; and a history for creating index information based on the history data. a data index information creation means; a historical data index information storage means for storing the index information in a high-speed storage device; a search instruction input means for inputting a search instruction for the stored historical data from an input device; a search condition retrieval means for retrieving conditions; an index retrieval means for retrieving index information stored in a high-speed storage device; a search condition determination means for determining a search condition based on the search conditions and the index information; A history data retrieval instruction means for issuing an instruction to retrieve historical data, a history data retrieval means for retrieving the historical data from the mass storage device in accordance with the retrieval instruction, and an extracted data storage means for storing the retrieved data in the storage device. A historical data processing method that is characterized by quickly selecting and extracting data that meets the conditions necessary for extraction from a large amount of historical data.