JPH01264526A - Digital protective relay device - Google Patents

Abstract

PURPOSE:To enable measurement without connection of a counter and an output unit by incorporating a counter for measuring the operating time of a relay. CONSTITUTION:A relay device 200 has an input converter 2 connected to a bus 5, a regulator 3, a MPU 1, a memory 4 and an input unit 6. when the device 200 is inspected, an analog simulation input is input from a tester 100 to the converter 2, and a trigger signal is simultaneously input to the unit 6. The regulator 3 counts the inner clocks of the device 200 from the input of the trigger signal to the output of the relay element from the MPU 1 to measure a period of time, and displays it on a display.

Description

DETAILED DESCRIPTION OF THE INVENTION OBJECTS OF THE INVENTION (Industrial Field of Application) The present invention relates to a digital protective relay device that improves the method of inspecting relay elements.

(Conventional Technique vff) In recent years, with the advancement of digital technology, the application of digital arithmetic devices such as microcomputers to protective relay devices has been carried out both domestically and internationally. The major advantage of this type of digital protective relay device is that it can be made smaller and more efficient by processing multiple elements using a digital arithmetic processing unit. It is possible.

However, when this type of digital protective relay device measures the operation or recovery time of a protective relay element for the purpose of characteristic measurement or inspection, an output device, a coefficient device, etc. are installed outside the digital protective relay device. It required a lot of testing time and was difficult to maintain.

FIG. 4 shows a configuration for measuring operating time characteristics of a conventional digital protective relay device.

100 is a tester that outputs an analog signal simulating an accident phenomenon in the system and a start signal in the event of an accident; 1 is a digital processing unit (
(hereinafter referred to as MPU), 2 is an input converter that converts an analog input electric signal into a digital signal, 3 is a setting unit that sets the operating value of the relay element, 4 is an output bag that temporarily stores the output from the MPU 1. [300] is a storage unit (hereinafter referred to as MEM) for sending a signal, 300 is an output device that interfaces the signal from MEM4 and converts it into a signal for the counting means 400, 5 is M I"tJ 1 , Input conversion unit 2, setting unit 3, bus for data transfer of MEM4, 200 is MPUI, input conversion unit 2, setting unit 3, ME
M'4 is a relay device including a bus 5, and 400 is a counting device that converts the input signal into a BJ number using the 1-rega input as a starting condition.

In general, an analog signal from the tester 100 simulating the accident phenomenon of the system yε is introduced into the input conversion circuit 2, converted into a digital signal, and introduced via the bus 5 to the MPU1.

Further, the value set in the setting section 3 is also sent to the MPU via the bus 5.
Introduced into I. The MPUI performs a scheduled protection relay calculation using the value set in the setting unit 3 and the digitally converted signal from the tester 100, and outputs it to the MEM 4 via the bus 5 on the condition that the operating conditions are met. is given, and the output signal from the MPUI is temporarily stored until the next state change. MEM,4 immediately outputs the output signal from the MPUI to the output device 200 connected to the relay device 200 via the bus 5, and is interfaced to match the people level of the counting device 400. introduced into the input terminal.

On the other hand, the tester 1 (10) outputs an analog signal output simulating an accident phenomenon in the system to the relay device 200, and at the same time sends a start signal to the counting device 400 to notify the counting device 400 that an accident phenomenon has occurred. introduced into the trigger terminal.

Therefore, the operating time of the relay element can be measured by counting using the dividing device 400 from when the start signal is output from the tester 100 to when the output device 300 outputs the output.

FIG. 5 shows an example of the configuration of the MPU 1. Functions that are the same as those in FIG. 4 are given the same numbers and will not be described here.

In the above description, the determination element (hereinafter referred to as a relay element) inside the MPUI was explained as one element, but normally, the relay element housed in the MPUI is composed of multiple elements.

1-1 to 1-3 are the relay determination elements described in "-",
It is composed of many other relay determination elements, and by comparing the signal from the input conversion section 2 and the signal from the establishment section 3, it is possible to make a multi-element determination and obtain an output. Therefore, the multi-element output of the relay elements from the MPUI is introduced via the bus 5 to the output device 300 shown in FIG. However, since the input of the counting device 400 normally has only one input terminal, the operator selects the output of the signal for measuring the operating time among the signals output to the output device 300 and outputs the signal to the counting device 400. They installed it and measured its operating time.

(□Problem to be solved by the invention) In the configuration shown above, the output bag r.
I made a mistake in selecting the output of 6300, and the ff-1 number device 400
For example, by introducing relay element 1 shown in FIG.
In some cases, the operation time of another relay element 1-2 was mistakenly counted when the operation time of relay element 1-1 should have been counted. Furthermore, a tester 100 is installed outside the relay device 200.
, the output device 300, the counting device 400, and other attached devices have caused a decrease in counting accuracy due to errors in the measuring instruments.

The present invention was made to solve the above problems.
・The purpose is to provide a digital protective relay device equipped with an inspection section that eliminates human-caused defects such as operator error, and allows simple and highly accurate measurement of operating time.

[Structure of the Invention] (Means for Solving Problem 7111) In the present invention, the output of the MPUI, which is the selection means provided in the setting section and selects the relay element, and the output of the relay element selected by the selection means, is provided. Input part 6 as the first input
The I-trigger output for accident simulation to be introduced is set as the second input, and the relay is operated until the first input, which is the output selected by the selection means, is received based on the second input, which is the trigger output for accident simulation. It is equipped with a counting means for counting the internal clock of the device zoo, and a display means provided in the setting section and displaying the counting result.

(Function) In the above configuration, the setting section selects the relay element,
Set conditions in the tester that allow this relay element to operate.

When a failure is simulated by the tester, the relay element determines that the operating conditions are met and generates an output.

On the other hand, at the same time as the failure simulation output is output by the tester, a trigger output is generated from the tester, and division is started inside the relay device. Counting is performed until the relay element output is output based on the 1 to RIGA output from the tester, and if there is a relay element output, the division is stopped, and the operating time is calculated for the R1 value and the time is displayed. can. Therefore, time can be measured without connecting a W'l number device, an output device, or the like.

(Example) An example will be described below with reference to the drawings. FIG. 1 shows an embodiment of a digital protective relay device according to the present invention.

The same numbers as in FIG. 5 are given and the explanation is omitted. 6 is tester 10
This is an input unit that converts the 1 to RIGA output from 0 to a signal value inside the relay device 200.

FIG. 2 shows an example of the configuration of the display unit 3 shown in FIG. 1. 7 is a display circuit that displays the set value J5 and operating value of the relay element. 8 is a setting circuit that sets the operating value of the relay element and calculates the operating time or return time using the clock inside the relay device 200.

FIG. 3 shows flowcharts 1 to 1 of the embodiment of the present invention.

50 is a setting process by the setting circuit 8 shown in FIG.
51 is a process for displaying the value set by the setting circuit 8; 52
is the selection process of the element whose operation time is to be determined, 5
3 determines whether there is a human trigger input from the tester] 00 in the input unit 6, 54 determines the division of the clock inside the relay device 200, 55 determines whether there is a relay element output from the MPU 1, and 56 stops counting. Processing, 57 indicates arithmetic processing for displaying operating time, and 58 indicates display processing.

In FIG. 1, the analog signal output from the tester 100 is converted into a digital signal by the input conversion section 2, introduced into the MPUI via the bus 5, and then converted into a digital signal by the setting circuit 8 in FIG. 2 inside the setting section 2. The planned protection relay calculation is performed by comparing with the set value, and on condition that the operating conditions are met, the relay element output is temporarily stored in the MEM 4, and is shown in FIG. 2 inside the setting section 3 via the bus 5. It is introduced into the setting circuit 8.

On the other hand, the trigger output from the tester 100 in FIG. Ru. The internal clock of the relay device 200 is counted based on the signals 1 to RIGA output from the tester 100 until the relay element output from the MPUI is output. By multiplying the R1 value by the time of the internal clock of the relay device 200 in the setting circuit 8, the operating time of the relay device 200 can be calculated. This calculated value is introduced to the display unit via the bus 5 and the operating time is displayed.

Furthermore, the embodiments shown in FIGS. 1 and 2 will be described in detail with reference to the flowchart in FIG. 3.

First, the setting section 3 performs settling in the setting circuit 8 through the process 50 to determine the operating value of the relay element, and displays the settled value on the display circuit 7 through the process 51. Next 5
In step 2, a relay element whose operating time is to be displayed is selected, and preparations are made to count the operating time or return time.

Next, in the process 53, it is determined whether or not there is an output amount of 1 to trigger output from the tester 100 in the input unit 6, and this process is looped until there is an input from the input unit 6, and unnecessary trigger output is sent to the input unit 6. 6 is not applied.

If there is a trigger output signal from the tester 100 connected to the input section 6, the next step 54 is to count the internal clock of the relay device 200 until the relay element output from the MPUI is reached in the step 55. When the relay element output disappears, division is stopped in process 56, and process 5
In step 7, the operation time is calculated by multiplying the relay internal clock by the counted value, and in step 58, the calculated value performed in step 57 is displayed on the display circuit 7, and the process ends.

According to the above embodiment, the output device 300 illustrated in FIG.
The counting device [400] is no longer required, and there is no longer any need for connection, improving work efficiency. The selection of the relay element by the operator's connection change in the output device 300 in FIG. 4 can be easily selected by the setting circuit 8 in the setting section 3 in FIG. 1, and the operating time can be measured or displayed. It becomes possible to select the element to be displayed without making a mistake. The input section 6 in FIG. 1 is a function provided in a normal digital protective relay device for inspection, etc.

Since the setting circuit 8 and display circuit 7 in FIG. 2 similarly utilize the functions provided by the digital protective relay device, they can actually be applied without significantly changing the conventional hardware configuration.

In the above embodiment, it has been described that the operating time can be measured and displayed, but the return time can also be measured and displayed. In FIG. 1, the relay device 200 is
If the trigger output from the tester 100 is output while the analog output of the tester 100 is turned off at the same time, the third
It can be applied without changing the flowchart in the figure.
゛Figure 6 shows another embodiment according to the present invention.

Functions that are the same as those in FIG. 1 are given the same numbers and will not be described here. Reference numeral 9 denotes an MPU similar to 1, which is constituted by a microcomputer or the like. The functions shown in FIG. 6 will be explained with reference to the flowchart shown in FIG.

In the embodiment shown in FIG. 1, the functions of the flowchart shown in FIG. 3 are all performed by the setting section 3, but in FIG. Let's do it, Process 53, Process 54, Process 5
5, processing 56 and processing 57 are performed by the MPU 9. That is, in order to reduce the processing and calculation load on the setting unit 3, only the counting process is performed by the MPU 9, which has a separate calculation processing capacity, in order to improve the processing capacity. Needless to say, there is no.

〔Effect of the invention〕

The present invention has been made in order to solve the above problems, and provides a digital protective relay equipped with an inspection section that eliminates human defects such as operator error and allows simple and highly accurate measurement of operating time. We were able to provide the equipment.

[Brief explanation of the drawing]

FIG. 1 is a diagram of an embodiment of the digital protective relay device according to the present invention, FIG. 2 is a detailed diagram of the settling section 3 in FIG. 1, FIG. 3 is a flowchart showing the process of FIG. 1, and FIG. 5 is a diagram showing the configuration of a conventional digital protective relay device, FIG. 5 is a diagram showing an example of the configuration of the MPU 1 in FIG. 4, and FIG. 6 is a diagram showing another embodiment according to Honjitsu. 1.9...Digital operation section 1-1.1-"2.1-3...Relay element 2...Input conversion section 3...Setting section 4...Memory
5... Bus 6... Input section 7... Display circuit 8... Setting circuit 100... Accident simulation tester 200... Relay device main body 300... Output device 400... Counting Device agent Patent attorney Nori Chika Ken Yudo Daishimaru Ken Vyumi Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] The accident simulation trigger output is triggered by using a selection means for selecting a relay element output and the relay element output selected by the selection means as a first input, and an accident simulation trigger output as a second input. and counting means for calculating the operating time by counting the relay internal clock until there is an output of the relay element selected by the selection means, and a display means for displaying the calculated value by the counting means, A digital protective relay device that measures and displays operating time.