JPH0438476A - Digital type protecting, controlling and mesuring apparatus - Google Patents

Abstract

PURPOSE:To rapidly display collected recording data without requiring operation after collecting and recording the arbitrary digital data in an apparatus, in a digital type protecting, controlling and measuring apparatus recording the arbitrary digital data in the apparatus, by using the completion of the collection and recording of data as a start signal to carry out data display processing and using the completion of data display processing as a start signal to carry out data collecting and recording processing. CONSTITUTION:The arbitrary digital data in a digital type protecting, controlling and measuring apparatus is recorded on the recording memory in the apparatus by a data collecting and recording means 11. After the completion of recording, a data display means 12 is started by the means 11 and recording data is displayed according to a recording data expressing and selecting means 13 and, after the completion of display, the data collecting and recording means 11 is started by the means 13. By this constitution wherein the starting of the means 12 and that of the means 11 are mutually carried out between data collecting and recording processing and data display processing, the collection, recording and display of data are rapidly carried out without requiring the operation of a person and operability and economical efficiency are enhanced.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a digital protection control and measurement device, particularly a digital protection device that can collect and display arbitrary digital data within the device. Connect to control and measurement equipment.

(Prior Art) The technology of applying microcomputers to protection, control, and measurement devices for power systems is well known.

Today, with the expansion of the power system scale, the increase in the number of system protection control and measurement equipment has become a problem, and one solution to this problem is to protect, control, and control a large number of There is a digital protection control measurement device that can perform measurements and can be made compact. Specifically, there are digital relays that determine system faults, fault rogators that locate system faults, system stabilization devices that stabilize the system, and digital oscilloscopes that observe harmonics generated in the system.

The digital protection control measurement device described above is currently
Although it is widely applied to the operation of power systems, the response of this type of digital protection control measurement device is difficult to understand compared to that of conventional analog devices (devices using mechanical relays, transistor relays, etc.) There is a problem. As a solution to these problems, the applicant has already proposed a recording display function configured to collect and record arbitrary digital data in the device and display it in a form of expression that matches the meaning of the data. (Patent Application No. 1-106597). According to the previously proposed function, it is possible to easily understand the response within the device, and it is also possible to record and display the amount of grid electricity input to the device.
It can also be used as an alternative to traditional oscilloscopes.

The conventional technology will be explained below using a digital relay as an example.

FIG. 6 shows the configuration of the digital relay shown in the above patent application. The digital relay shown in the figure has a basic configuration of an analog/digital converter 1, a digital arithmetic processing section 2, a setting section 3, an external input/output interface 4, and a bussler, as well as a data collection and expression section. It consists of 10.

Note that the units 1 to 4 and 10 are interconnected via a bus 5.

Analog-digital converter 1 is analog filter 1
-11 to 1-In, sampling hold section 1-21
1-2n, multiplexers 1-3. It consists of analog-to-digital converters 1-4 and is protected by
After holding (n≧1) pieces of analog information A-1 to A-n at predetermined sampling intervals, they are converted into digital quantities.

On the other hand, the digital arithmetic processing section 2 is a CPU 2-1.

RAM2-2. The electrical quantity data converted into digital data is sequentially transferred to the RAH2-2.
The CPU 2-1 uses this data and the program from the ROH 2-3 to perform various processes such as relay determination calculations. The setting section 3 converts the sensitivity of a relay or a value set from an external source such as a timer into predetermined digital data, and functions as an interface for passing the data to a digital arithmetic processing section.

The input/output interface 4 is an interface for importing external control device states such as CB information, and outputting relay operations, recovery output drip commands, etc. to external devices.

The above is the basic configuration of the digital relay, but in addition to this, there is a data collection and expression section 10, which is connected to the bus controller via the interface 10-5 and is connected to the
PU 10-1. RAM 10-2. ROH10-
3゜11010-4 and the bus 1 that interconnects them
It is composed of 0-6. In addition, keyboard E1 and CR
The T device E2 is connected to the data collection and expression unit 1o via Ilo 10-4. The data collection and expression section 10 enables recording and display of arbitrary data within the device.

The function of the data collection and expression section will be described below.

First, the keyboard E1 selects the RAM 2-2 or 110 in which data to be collected and recorded exists from within the device.
4 address (setting address and recording time information 6 Recording time information includes data collection start timing, data collection end timing, data collection interval, etc.). The number of data will be determined.

Next, data will be recorded in the device according to the above settings, and the collected data will be transferred to the RAI410-
2 and, if necessary, displayed externally in an appropriate representation via the CRT device E2 in accordance with commands from the keyboard E1.

(Problem to be Solved by the Invention) In the conventional technology described above, the collected and recorded data can be collected and recorded by commands from outside the device, for example, from the keyboard [1].
In accordance with instructions from etc., the form is displayed on the CRT device E2. Specifically, for example, using a breaker trip command as a recording start signal, the input electrical quantity relay operation output, IN device information, etc. for several tens of cycles before and after the recording start signal is recorded, and time charts, vectors, etc. are recorded on a CRT device. Displayed in an expression that is easy for humans to understand.

Here, the keyboard E1 is mainly used to select a desired screen on the CRT. This is because the amount of recorded data is generally larger than the amount of data that can be viewed on the same CRT screen, and this situation is shown in FIG. Figure 7 shows that a human selects one screen out of n screens using the keyboard E1.
It shows the probe displayed on CRT and E2. Here, for example, screen 1 is a time chart of each phase voltage, screen 2 is a time chart of each phase current, screen 3 is a time chart of short circuit relay operation, and screen n is a screen of different display items such as voltage and current vectors. As a concrete implementation means, screen data corresponding to such n screens is stored in RAM 1.
0-2, and the collected record data is processed according to the corresponding screen data using the information from the keyboard E1 and displayed on the CRT.
will be displayed.

When using such a display procedure, various data can be displayed on a CRT.
This is convenient for sequentially displaying the information in an interactive format, but on the other hand, when a person wants to view new recorded contents that are updated sequentially for the same item of interest (for example, only screen 1 in Figure 7). , it is necessary to display the content that is not viewed each time using the keyboard E1. There is no problem with this procedure if you have time after a system accident occurs, but if you do not have time, for example, if you want to understand the nature of the accident immediately after the accident occurs, you may need to take the time to operate keyboard E1. It is possible that there is no such thing.

In addition, if there is a need to observe gradual changes in grid voltage, current, power, etc., for example at 1 second intervals, with conventional technology, it generally takes more than 1 second for a human to operate the keyboard E1. The problem is that it cannot be achieved.

Furthermore, when using this record display function for relay dynamic tests, etc., test by applying a wide variety of AC inputs and displaying the input electricity amount, relay operation output, etc. on the CRT. However, in this case as well, if the keyboard E1 is operated for each case to obtain the necessary display, a problem arises in that the work efficiency decreases.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to promptly display the collected recorded data without requiring any human operation after collecting and recording arbitrary digital data in a digital protection control measuring device. The purpose of the present invention is to provide a digital protection control measurement device that is capable of

(Left below) [Configuration of the invention (Means for solving the problem) As shown in the diagram showing the basic concept in Fig. 1, the present invention records arbitrary digital data in a digital protection control measurement device. A data collection and recording means 11, a data display means 12 for displaying collected and recorded data, and a recorded data expression selection means 13 are provided, and the data collection and recording means 11 and the data display means 12 mutually pass activation signals to the fishing means. It was configured to match.

(Function) Any digital data in the device is recorded in a recording memory in the device by the data collection and recording means 11. After the recording is finished, the data display means 12 is activated to display the recorded content according to the recorded data representation selection means 13, and after the display is finished, the data collection and recording means 11 is activated.

(Example) An example will be described below with reference to the drawings. The hardware configuration diagram of the digital relay according to the present invention is the same as that shown in FIG. 6, and its explanation will be omitted.

The effect will be explained below.

First, the keyboard E1 selects the RAM 2-2 or 110 in which data to be collected and recorded exists in the device.
4. Set the address and recording time information. The recording time information includes data collection start timing, data collection end timing, day and evening collection intervals, and the like. The number of data to be recorded is determined based on the set address and recording time information.

Next, data will be recorded in the device according to the above settings, and the collected data will be stored in the RAM 10-
2 is recorded.

The processing up to the above is similar to the conventional technology. A feature of the present invention is processing after data recording, which will be explained below with reference to FIG. 2.

FIG. 2 shows the data collection and recording means 11 and the data display means 1.
2 shows the temporal relationship of the processing; first, after the data collection and recording processing is completed, an activation signal is passed to the data display means.

This starts the display process. Specifically, R.A.
) The recorded data recorded in 4 is processed in display processing,
It is displayed on the CRT in a predetermined format.

Here, the data representation is performed by the recorded data representation selection means 13 without requiring information from the keyboard E1 each time.
This will be done according to the selected content.

The recorded data expression selection means 13 selects the RAN from the keyboard E1 in advance before the data collection and recording process is started.
10-2, this is achieved by selecting and setting screen data that is not to be displayed from among a plurality of screen data.

Next, after the display processing is completed, a start signal is passed to the data collection and recording means. As a result, the data collection and recording process is restarted, and data recording is performed.

Thereafter, by repeating the above procedure, data collection, recording and display are automatically and quickly performed without requiring any operation of the keyboard E1 each time.

There are two types of data collection and recording methods, which are shown in FIG. One is from the activation signal from the display means.
This is a mode in which data is collected and recorded immediately, as shown in Figure 3 fa). For example, electric current.

It is suitable for observing gradual changes in the effective voltage value. Generally, the acquisition recording interval is about several Is. The CRT display screen obtained at this time displays data that changes from moment to moment.

The other mode is a mode in which data collection is started by a start signal from the display means, but recording waits for a record start signal such as when an accident occurs, as shown in FIG. 3 (1). In this mode, the data collection period and recording period are different from the previous modes and do not coincide. This mode is suitable for displaying instantaneous values of current and voltage, and generally the recording interval is on the order of several tens or hundreds of ms. The CRT display screen obtained at this time is a display showing changes in recorded data before and after one recording start.

The effects of the present invention are the same in the above two modes, and recorded data can be displayed efficiently without time delay.

In the above embodiment, data collection recording and data display are repeated alternately, but the effect is of course the same even if the start signal is stopped after the display processing is completed and the data collection recording is not restarted. be.

FIG. 4 shows another embodiment, and FIG. 4(a) shows that after a predetermined time T has elapsed from the end of data collection recording, a start signal is passed to the display means to perform display processing, and after the end of the display, As in the previous embodiment, the activation signal is passed to the data collection and recording means, and this process is repeated thereafter.

If the predetermined time T is sufficiently longer than the data collection and recording processing time and the display processing time, it can be said that the time interval between each display processing is approximately equal to the predetermined time T. That is, by setting the predetermined time T, it becomes possible to periodically automatically display current, voltage effective values, etc., and by setting the predetermined time T from the keyboard E1, this cycle can be easily changed.

In FIG. 4(b), display processing is performed starting from the end of the data collection recording, and the display processing is started from the end of the display processing for a predetermined time T.
Data collection and recording processing is performed using the progress as a trigger.

In the above embodiment, the display output is output via a CRT, but the same effect can be obtained by using other media such as a printer.

Also, the recorded data is not in RAM 10-2 but in cpυ1.
It may also be in the form of being temporarily stored in a register within 0-1.

In the embodiments described above, the data collection and expression section was implemented in one place, but a configuration diagram of another embodiment is shown in FIG. 5.

In this embodiment, the data collection representation section 10 is separated into a data collection and recording section 20 and a data setting display section 30.

The reason is for data collection recording processing or other processing.
This is because higher speed CPU performance is required. By dividing the roles in this way, faster data collection and presentation becomes possible. Note that the data setting display section 30
The processing speed required for this is not high, and a general-purpose portable computer or the like may be used.

Here, the data collection and recording means 11 described in the above embodiment is realized by the data collection and recording section 20, and the data display section 12 is realized by the data setting display section 30, and each activation signal is transmitted via Ilo of both sections. transmitted.

This embodiment also provides the same effects as those of the previous embodiment.

[Effects of the Invention] As explained above, according to the present invention, data collection and recording processing and data display processing are configured to start each other, so data collection and recording can be performed without requiring human operations. It is possible to provide a digital protection control and measurement device that can display information quickly, has excellent operability, and is economical.

[Brief explanation of the drawing]

Fig. 1 is a functional block diagram showing the basic concept of the digital protection control measurement device according to the present invention, Fig. 2 is a time chart showing the relationship between data collection records and display, and Fig. 3 shows the data collection and recording method. 4 is a time chart of another embodiment showing the relationship between data collection record and display, FIG. 5 is a diagram showing the configuration of another embodiment, FIG. 6 is a conventional configuration, and FIG. It is a figure which shows the screen selection method. 11... Data collection and recording means 12... Data display means 13... Recorded data expression selection means

Claims (1)

[Claims] The amount of electricity in the power system is sampled and held at a predetermined timing, and the held analog amount is converted into a digital amount. The digital data obtained is used to perform protection control measurements for the power system, and In a digital protection control measurement device that records and displays arbitrary digital data, the end of data collection recording is used as a start signal.
A digital protection control measuring device characterized in that data display processing is performed using an expression method selected by recording data expression selection means, and data collection and recording processing is performed using the end of data display processing as a start signal.