JPH05161243A - Digital protective controller - Google Patents

Abstract

PURPOSE:To obtain necessary information quickly and accurately by a method wherein a screen information corresponding to a phenomenon created inside or outside an apparatus is selected and displayed. CONSTITUTION:1-N created phenomena and screen tables 1-N corresponding to them are prepared beforehand. For instance, if a phenomenon 1 is created, a screen information 1 is automatically selected by a phenomenon start picture information selecting means 17 and the picture information necessary to treat the phenomenon 1 is displayed on a display 15 in a moment. With this constitution, the necessary information can be obtained quickly and accurately without the necessity of the operation by a user.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital protection control device, and more particularly to a digital protection control device having a display system capable of displaying information in the device on a display.

[0002]

2. Description of the Related Art The technique of applying a microcomputer to a protection and control device for a power system is well known.
Today, with the expansion of the power system scale, the increase in the protection and control equipment of the system is becoming a problem.
As one solution, there is a digital protection control device capable of protecting a large number of protections, protections for a controlled object, and controlling the device and making the device compact. Specifically, there are a digital relay for determining a system fault, a fault locator for locating a system fault, and a system stabilizing device for stabilizing the system. The digital protection control device described above is currently widely applied to the operation of a power system. The conventional technique will be described below by taking a digital relay as an example.

FIG. 7 shows the structure of a basic digital relay. The digital relay shown in the figure comprises an analog / digital conversion unit 1, a digital arithmetic processing unit 2, an external input / output interface 3, a bus 4, and an operator interface unit 10. 1
3 to 10 are connected to each other via a bus 4. The analog / digital converter 1 is an analog filter
1-11 to 1-1n, sampling and holding section 1-21 to 1-2n,
Multiplexer 1-3, analog / digital converter 1-4
And holds n pieces (n ≧ 1) of analog information A-1 to An to be protected at a predetermined sampling interval and then converts them into digital quantities. On the other hand, the digital arithmetic processing section 2 includes a CPU2-1, a RAM2-2,
The electric quantity data, which is composed of M2-3 and is digitally converted, is sequentially transferred to the RAM2-2, and the CPU2-1 uses the data and the program from the ROM2-3 to perform various kinds of processing such as relay judgment calculation. Do.

The input / output interface 3 is an interface for fetching the state of external control equipment such as CB information, relay operation, return output, and output to the external equipment such as a trip command. The operator interface section 10 is a section for interfacing between the digital protection control device and the operator of the apparatus, and the input given from the operator to the apparatus is mainly the sensitivity of the relay or the set value of the timer or the like, the switching command, etc. The output given from the device to the operator includes a relay operating state, a set value setting state, a device operating state, and an external control device loading state. In the case of a digital relay, since a large number of protection functions can be accommodated with the above configuration, the operator interface section 10 is generally concentrated in one place as shown in FIG. Form. The functions will be specifically described with reference to the drawings. An operation display unit 1 displays the operation of the relay, and turns on the LED corresponding to the operated relay. As a part to be used for relay settling, settling start 3a, relay element selection key 5,
There is a character display 2a that displays the settings made up to the previous time. In this case, a new settling value is input from the settling value setting ten-key pad 4, and the value is displayed on the character display 2b. 3b
Is a set value write key, and temporarily sets the set value. When changing other relay elements continuously, repeat the above. Operation start key 3c when all changes are completed
Causes the new set value to overwrite the previous set value.

The above is an operator interface of a commonly used digital relay, but in recent years, due to the development of electronic devices, not liquid crystal display but EL, electroluminescence (EL),
Display by a display such as plasma has been proposed. The display includes a character display for displaying character information and a graphic display for displaying graphic information, both of which can display more internal information of the device than the operator interface using the light emitting diode described above. FIG. 9 shows an example of this. The figure shows the document “cigre Symposium Bournemou
th 1989S34-89 “USER FRIENDLY OPERATOR INTERFACE F
OR A NEW GENERATION OF DIGI-TAL RELAYS ”(by WS
KWONG et al.) ”Is the digital relay operator interface. 6 is an alphanumeric liquid crystal display for status display, which displays trip display, set value display, alarm display and the like. Reference numerals 7, 8, 9, and 10 are keypads for a menu-driven system described later, and an operator can activate a submenu or a command from this by selecting a menu. Specifically, four arrow keys including 8 are used to search for a submenu or command from the menu, and 9 is used to select and determine. 7 and 10 respectively reset the failure information and read the setting reading failure information.

FIG. 10 shows the command execution method of FIG. 9, which is based on the menu drive method. That is, information retrieval, settling, control parameter input, and the like can be performed by a command menu, and the command menu has a plurality of level tree structures. The movement when selecting a menu or a command is performed by controlling up, down, left and right with four cursor keys shown in FIG. The level commands are arranged vertically, with the top level at the far left. For example, during relay settling, you can use the arrow keys to advance to a level where you can change the setting, and use the arrow up / down keys to raise or lower the settling value. FIG. 11 is a comparison of the two operator interfaces described above in terms of the display mechanism. Figure 11 (a)
Is a mechanism that is performed by a display means such as a light emitting diode,
Display information 1, 2 and 3 is displayed from a large number of in-device information 11 such as device information collected from outside, settling value information, relay operation information obtained by protection function, etc. It is a mechanism displayed by means 12, 13, and 14, respectively. FIG. 11 (b) shows a mechanism performed by the display means by the display. The difference from the case of using the light emitting diode is that the display means corresponding to the display information is not provided in one-to-one correspondence, The point is that it has one display means 15. Which screen information is used to display the screen depends on the screen selecting means 16 for activating the menu, and the operator selects the screen according to a predetermined menu to obtain the required screen.

[0007]

The subject of the present invention based on the above-mentioned conventional device is the display method performed by the display of FIG. 11 (b). The problem with this display method is that the operator must select the required screen. Generally, in the case of a protection relay, the operator needs to display the information at the time of an emergency such as a system accident or a device abnormality. In such an emergency, it is necessary to have a high degree of skill in operating the apparatus in order to select a required screen without error using the menu shown in FIG. In addition, there is a possibility that a human error may cause a delay or a human error, which may be a problem in terms of operability and reliability. The present invention has been made in view of the above circumstances, and easily and quickly displays a screen necessary for a display without requiring human operation even in an emergency such as a system accident or a device abnormality. It is an object of the present invention to provide a digital protection control device that can be used.

[0008]

In order to achieve the above object, the structure of the present invention will be described with reference to FIG. 1. The present invention includes an event start screen selecting means 17 for selecting screen information according to each event occurring inside and outside the apparatus. , A display 15.

[Operation] Screen information 1, 2 obtained from the in-apparatus information 11
…, Events that occur inside and outside the device from inside N, 1, 2,…,
The screen information corresponding to M is selected by the event activation screen selection means 17 and displayed on the display 15.

[0009]

Embodiments will be described below with reference to the drawings. Figure 2
FIG. 8 is a hardware configuration example diagram of a digital relay according to the present invention, which is basically the same as FIG. 7. However, the operator interface unit 10 is configured to control the display, is connected to the bus 4 via the interface 10-5, and has a CPU 10-1, a RAM 10-2, and a ROM 10-.
3, I / O 10-4 and their interconnection buses 10-6. Further, the display 15 is connected to the operator interface unit 10 via the I / O 10-4. This allows collection and display of arbitrary data within the device.

The features of the present invention are realized by a program stored in the ROM 10-3, and its operation will be described below. First, the in-apparatus information 11 is transferred from the operator interface unit 10 to the analog / digital conversion unit 1, digital arithmetic processing unit 2, input / output interface 3, bus 4
Screen data 1 to N are created by the processing of the CPU 10-1 by combining the screen data stored in the ROM 10-3 with the data generated from each unit. The screen data stored in the ROM 10-3 is fixed data that does not depend on the device state, and the data collected from each unit is variable data that depends on the device state. The former is, for example, a screen title, a relay element name, etc., and the latter is, for example, a relay operation result, a constant monitoring detection result, a trip element name, etc.

FIG. 3 shows an example of screen information. Fig. 3 (a) is an example of the trip information screen, which displays the time, accident phase, and accident appearance when the device gives a trip command to the circuit breaker. Fig. 3 (b) is an example of the relay operation status screen, showing the operation and recovery status of each relay mode. In the figure, the circle marks indicate that they have operated. Fig. 3 (c) is an example of the screen of the continuous monitoring result.
The part where the monitoring is defective and other defect information are displayed. Next, the CPU 10-1 checks the occurrence states of events 1 to M. For example, event 1 is the trip command output, event 2 is the operation of a specific relay element, event 3 is the constant monitoring failure, etc. These are RAM2-2 or I / O3.
The occurrence of each event can be detected by the CPU 10-1 reading the contents of the corresponding address such as.

Next, the event activation screen information selection means 17 is realized by the processing shown in the flowchart of FIG. In this flowchart, 1, 2, ..., N occurrence events and corresponding screen tables 1, 2, ..., N are prepared in advance, and when event 1 occurs, screen information 1 is automatically selected. ,
The screen information necessary for coping with event 1 can be displayed instantaneously. In this way, it is displayed on the screen information display 15 selected by the event activation screen selection means 17. As described above, according to the present invention, the screen to be displayed on the display is selected and displayed in response to an event that occurs inside or outside the apparatus. It is possible to quickly display necessary information without requiring the operation of. Equation (1),
As explained from Eq. (2), the effect of the quantization error becomes conspicuous in a small input area, and it is impossible to realize a highly accurate relay operation. On the other hand, according to the configuration of the present invention, for a small input, the operation output is obtained by the protection relay calculation 22 based on the digital data obtained from the input circuit having a small input full scale, so that a highly accurate relay calculation is realized. You can do it. According to the above embodiment, it is possible to select an input circuit suitable for the input and a corresponding protection relay computing means according to the input, and it is possible to obtain a wide input full scale and a high-precision protection relay device as a whole. . In the embodiment described above, two input circuits are provided for the same system electricity quantity, but the same is true if three or more are provided. The more input circuits provided, the larger the input full scale and the higher accuracy. It will be possible to calculate glue relay.

FIG. 5 is a flow chart showing the processing contents of another embodiment. In the above embodiment, one screen information corresponds to one occurrence event with M = N.
A plurality of screen information may correspond to one occurrence event. This case will be described below. In this case M <N
After the occurrence of a certain event, the first screen corresponding to the event is selected by the above-mentioned flowchart, but the second screen and subsequent screens are selected by the operator from the menu as shown in the flowchart of FIG. To In the figure,
Screen information one level below the second screen onwards 1-1, 1-2, 1-3
,…, 1-l The menu selection function is provided so that the required screen information can be selected from the 1 screen. In short, when the event 1 occurs, the screen information 1 is automatically selected. In this screen information 1, a menu that can select the above l pieces of screen information is prepared, and the corresponding screen information is operated by the operator. select. In addition, in general, the first screen is the outline content related to the event, and is the information that the operator wants to obtain quickly and accurately without requiring the operation of the operator. Therefore, in this case, as in the case of the above-described embodiment, Since one screen is selected according to the occurrence event, the expected effect is the same as that of the above-mentioned embodiment.

FIG. 6 is a flowchart showing the processing contents of still another embodiment. In this embodiment, a plurality of pieces of screen information correspond to one occurrence event, the first screen is selected in the same manner as in the first embodiment, and the second and subsequent screens are sequentially selected and displayed at a predetermined time. The procedure in this case will be described below. First, when event 1 occurs, screen information 1 is selected. The screen information one level below that belonging to the screen information 1 is shown in FIG.
Similarly, there are a plurality of files, and they are updated at a specified time interval according to a specified order. By doing so, it is possible to automatically switch the screen and call the necessary screen information without depending on the memory. As described above, it is possible to easily and accurately obtain the required information without requiring the operator to operate the second screen and thereafter.

[0015]

As described above, according to the present invention, the screen information corresponding to the occurred event is automatically displayed on the selected display, so that the operator's operation is not required. Since the necessary information can be obtained quickly and accurately, it is possible to provide a digital protection control device with excellent operability and reliability.

[Brief description of drawings]

FIG. 1 is a block diagram of a digital protection control device according to the present invention.

FIG. 2 is a hardware configuration diagram of an embodiment of the present invention.

FIG. 3 is a typical example of in-apparatus information displayed on a display.

FIG. 4 is a flowchart showing a screen selecting means by event activation.

FIG. 5 is a flowchart of menu selection when a plurality of screen information correspond to one occurrence event.

FIG. 6 is a flowchart when a plurality of pieces of screen information automatically correspond to one occurrence event.

FIG. 7 is a conventional hardware configuration.

FIG. 8 is a conventional operator interface.

FIG. 9 shows an example of an operator interface using a display.

FIG. 10 is the menu method used in FIG. 9.

FIG. 11 is a diagram showing a configuration of a conventional operator interface in terms of a display mechanism.

[Explanation of symbols]

 10 Operator interface section 11 Device information 12, 13, 14, 15 Display means 16 Menu start screen information selection means 17 Event start screen selection means

Claims (1)

[Claims] 1. A digital protection control device for inputting the amount of electricity of a power system and converting it into digital data to perform protection control of the power system, and a display means for displaying the in-device information and a display means for displaying the information. 2. A digital protection control device, comprising: self-start screen selection means for automatically selecting screen information to be displayed in response to events occurring inside and outside the device.