JPH10282171A - Tester for protective relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a function test accurately and quickly by eliminating the contact part except an operating board thereby simplifying the structure. SOLUTION: Function test of a protective relay is performed by a simulation circuit breaker 12. Since simulation circuit breaker 12 includes an operating panel 18 comprising an operational command input circuit 13, a chattering prevention circuit 14, an operation delay time setting circuit 15, an FF circuit 16, a response output circuit 17 and a personal computer interface, the structure is simplified as compared with a conventional simulation circuit breaker comprising a combination of mechanical contacts and the overall size can be reduced. Various function tests can be carried out by transferring a data from the operating panel 18 and a personal computer 19 thereby setting the operational command input current of the operational command input circuit 13, the operation delay time of the operation delay time setting circuit 15 and the state of the FF circuit 16 appropriately. Furthermore, generation of counter electromotive force due to a reactance and generation of noise due to deterioration of contact can be prevented through the use of an FET element and a Peltier element.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a test device provided with a simulated circuit breaker for testing the function of a protective relay device.

[0002]

2. Description of the Related Art As a conventional test device for a protective relay device, there is one having a schematic configuration as shown in FIG. In FIG. 6, reference numeral 1 denotes a protective relay device, and 2 denotes a simulated circuit breaker that receives an ON / OFF command from the protective relay device, operates or returns, and inputs its operation response to the protective relay device 1.

The simulated circuit breaker 2 is set when an ON command is received from the protective relay device 1 and reset when an OFF command is received. The operating parts S and R of the keep relay, and the excitation of the operating parts S and R are performed. And a contact section SW for inputting an ON / OFF signal to the protection relay device 1. The function test of the protection relay device 1 is performed by the operation of the simulated circuit breaker 2.

[0004]

However, in the test device for a protective relay device having such a configuration, when the protection relay device 1 receives a command to enter or turn off the simulated circuit breaker 2, the operation of the test device is controlled. Since the ON / OFF signal of the contact section SW by the excitation of the sections S and R is input to the protection relay device 1, the time from issuing the ON or OFF command to receiving the corresponding signal becomes constant. It is not possible to perform a function test with an operation delay time. Further, in order to provide the simulated circuit breaker with various operation delay times, a circuit having a combination of a timer and a contact must be used.

When the trip function test of the protection relay device 1 is performed, when a close command is input from the protection relay device 1 and then a trip command is input, the contact portion SW is turned off. Is operated by the excitation of the operation section of the keep relay, so that the contact section SW of the simulated circuit breaker 2 is operated.
Causes chattering, and the trip function test cannot be performed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has a simple and small-sized protection that can perform a function test with various operation delays accurately and quickly without malfunction. An object of the present invention is to provide a test device for a relay device.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention comprises a test device for a protective relay device by the following means. According to a first aspect of the present invention, when a trip command or a close command is input from a protection relay device, the command is divided by the command and output as an insulated command signal. A signal is input, chattering prevention means for preventing chattering due to simultaneous input of a trip command and a close command, operation delay time setting means for setting an operation delay time of a trip or close operation command input from the chattering prevention means, Storage means for holding a trip or close operation command for the operation delay time set in the operation delay time setting means, and a response for outputting a response output by the trip or close operation command stored in the storage means to the protective relay. Output means, the operation command input means, the operation delay time setting means, And the response output means is obtained by an operation panel for various settings.

Therefore, in the test apparatus for a protective relay device according to the present invention, the operation command input means, the chattering prevention means, the operation delay time setting means, the storage means,
Since the simulated circuit breaker 12 is constituted by the response output means and the operation panel, there is no contact portion except for the operation panel, so that the whole structure can be reduced by a simple configuration.

According to a second aspect of the present invention, in the first aspect of the present invention, an operation command input means is turned on by a drive current set by a power supply setting circuit to output an operation command input current. The Peltier device absorbs heat generated by the current flowing through the FET device and dissipates heat.

Therefore, in the protection relay testing apparatus according to the second aspect of the present invention, it is possible to prevent the back electromotive voltage due to the reactance and the noise due to the gap caused by the deterioration of the contact.

The invention corresponding to claim 3 is the invention according to claim 1, wherein the chattering preventing means has a trip command priority function of giving priority to the trip command and outputting the trip command when the trip command and the closing command are input simultaneously. It is.

Therefore, in the protection relay test apparatus according to the third aspect of the present invention, even if the trip command and the close command are input at the same time, the trip command is given priority and chattering can be prevented.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the operation panel has a personal computer interface, and information can be transferred between the personal computer and an externally installed personal computer through the personal computer interface. Things.

Therefore, in the protection relay tester according to the invention, since information can be transferred between the simulated circuit breaker and the personal computer, various settings and closing from the personal computer can be performed. The command and trip command status can be monitored and recorded on the personal computer side.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a test device for a protective relay device according to the present invention.

In FIG. 1, reference numeral 11 denotes a protection relay device to be tested, and reference numeral 12 denotes a simulated circuit breaker for testing the protection relay device 11. The simulated circuit breaker 12 includes an operation command input circuit 13 to which a trip command or a close command is input from the protection relay 11,
3, an operation delay time setting circuit 15 for setting an operation delay time of a trip or close operation command input from the chattering prevention circuit 14, and an operation delay time setting circuit 15. A flip-flop circuit 16 that holds a trip or close operation command for the operation delay time set in
The response output by the trip or close operation command held in the flip-flop circuit 16 is protected by the protection relay device 11.
And a function of inputting / outputting information to / from a personal computer 19 provided outside, and the operation input circuit 13 and the operation delay time setting circuit 1 described above.
5. An operation panel 18 having a personal computer interface for inputting / outputting various command signals to / from the flip-flop circuit 16 and the response output circuit 17 is provided.

As shown in FIG. 2, the operation command input circuit 13 includes a power supply setting circuit 13-1 for setting a circuit breaker operation command input current, and a drive current set by the power supply setting circuit 13-1. 13-2 and the variable resistor 13
-3, which are connected to the trip and close command input terminals via the Peltier element 13-5 at the drain side, and connected to the source side. Are commonly connected to a common terminal.

In this case, the Peltier element 13-5 is an FET
It has a function of absorbing heat generated by a current flowing when the element 13-4 is turned on and dissipating heat. Further, the chattering prevention circuit 14 includes an operation command input circuit 1 as shown in FIG.
When a trip operation command is input to the input terminal ti1 from the input terminal 3, the trip operation command is supplied to the operation delay time setting circuit 15 from the output terminal to1 and the inverting circuit 14-1.
, A closing operation command is input from the input terminal ti2 to the other input terminal of the AND circuit 14-2, and is output only when the AND condition is satisfied. The operation delay time setting circuit 15 is configured to receive a close operation command from the terminal to2.

Further, although not shown here, the response output circuit 17 has a circuit configuration using FET elements, like the operation command input circuit 13. On the other hand, the operation panel 18
Is an operation switch, display LED, trip command delay time setting switch, close command delay time setting switch,
An input mode, a delay time unit setting switch, and the like are provided. The setting of the operation command input current of the operation command input circuit 13, the setting of the operation delay time of the operation delay time setting circuit 15, and the setting of the state of the flop-flop circuit 16 are manually performed. And can be set based on the setting information from the personal computer 19.

Further, a breaker operation command input state (close signal, trip signal, etc.) is transferred to a personal computer 19 through a personal computer interface provided on the operation panel 18 so that such information can be recorded and monitored.

Next, the operation of the test device for the protective relay device configured as described above will be described. Now, in testing the protection relay device, the setting of the operation command input current of the operation command input circuit 13, the setting of the operation delay time of the operation delay time setting circuit 15, and the setting of the flop-flop circuit 16 from the operation panel 18 of the simulated circuit breaker 12. It is assumed that the state setting has been performed.

In such a state, when a trip command or a close command is input from the protective relay device 11 to the simulated circuit breaker 12, first, the operation command input circuit 13 divides the trip command or the close command and insulates the command signal. To the chattering prevention circuit 14.

In this case, as shown in FIG. 2, the operation command input circuit 13 sets a set value of the operation command input current, for example, 0A to 5A.
A (0A, 1A, 3A, 5A)
-4 turns on the gate, and the trip command or the close command input from the command input terminal is output from the common terminal.
At this time, heat is generated by the current flowing through the FET element 13-4, but this heat is hardly affected by the heat due to the heat dissipation effect of the Peltier element 13-5.

Since the chattering prevention circuit 14 is constituted by a logic circuit as shown in FIG. 3, the trip command and the close command are not output at the same time.
That is, in FIG. 3, when a trip command is input to the input terminal ti1, a trip command is issued from the output terminal to1. When a close command is input to the input terminal ti2, the output of the inverting circuit 14-1 is "1" and the close command is "1". Therefore, the AND condition of the AND circuit 14-2 is satisfied, and the close command is output from the output terminal to2. Is output. Further, when the trip command and the close command are input at the same time, the output of the inverting circuit 14-1 becomes "0", and the AND condition of the AND circuit 14-2 is not satisfied.
Chattering is prevented by a trip command priority function that outputs only a trip command from the output terminal to1.

Next, when a trip command or a close command is input from the chattering prevention circuit 14 to the operation delay time setting circuit 15, the operation delay time setting circuit 15 operates by the operation delay time set in advance on the operation panel 18 side. The output is delayed and input to the flip-flop circuit 16.

In the flip-flop circuit 16, a trip operation signal or a close operation signal is input to the response output circuit 17 by a pulse input according to the frequency division ratio set on the operation panel 18.

Accordingly, the response output circuit 17 sends the output of the flip-flop circuit 16 to the protection relay device 11 as a response output of the trip operation signal or the close operation signal. Here, the operation of each command input and output of the simulated circuit breaker 12 will be described with reference to a time chart shown in FIG.

In a normal operation, when a close command is turned on at time t1, the output is changed to t after the close delay time.
It is turned on at two points. Then, the trip command is t3
If the input is turned on at this point, the output will be t after the trip delay time.
The on-state is maintained until it is turned off at four points. However, when both the close command and the trip command are turned off within each delay time, it does not operate.

Next, in the trip priority operation, when the close command is input at time t5, the output is turned on at time t6 after the close delay time, and thereafter, when the trip command is input at time t7, the output is tripped. It turns off at time t8 after the delay time. Thereafter, even if the close command is continuously input on, the output does not go into the on state. In this case, after the close command is turned off, the same operation as described above is performed.

Here, as a specific example of the sequence of the protection relay device and the circuit breaker operation circuit, a circuit configuration as shown in FIG. 5 is given. In FIG. 5, as the sequence of the protective relay, the contact 44 of the short-circuit distance relay, the contact 51 of the overcurrent relay, and the auxiliary relay 52AX are connected in series, and a self-holding circuit is formed by the normally open contact 52AXa of the auxiliary relay 52AX. ing. As a circuit breaker operating circuit, a trip circuit TC of the circuit breaker is connected in series with the auxiliary relay 52AX, and a response output circuit CB of the circuit breaker is connected in parallel with the trip circuit TC.

In the sequence of the protection relay device and the circuit breaker operation circuit having such a configuration, the operation of the circuit breaker operation circuit when both the contact 44 of the short-circuit distance relay and the contact 51 of the overcurrent relay are turned on is determined by the operation of the protection relay. The trip command is input to the operation input circuit TC of the circuit breaker through the sequence of (1), and the operation of the operation output circuit CB is monitored by the operation of the operation input circuit TC.

In this test apparatus, the function test for the sequence by such a protective relay is performed by the above-described simulated circuit breaker. As described above, in the present embodiment, the simulated circuit breaker 12 is controlled by the operation command input circuit 13, the chattering prevention circuit 14, the operation delay time setting circuit 15, the flip-flop circuit 16, the response output circuit 17, and the operation panel 18 having the personal computer interface. With this configuration, the configuration is simpler and the overall size can be reduced as compared to a conventional simulated circuit breaker using a combination of mechanical contacts.

The setting of the operation command input current of the operation command input circuit 13, the setting of the operation delay time of the operation delay time setting circuit 15, and the setting of the state of the flop-flop circuit 16 by transferring data from the operation panel 18 or the personal computer 19. , Various functional tests can be performed.

Further, since the operation command input circuit 13 and the responsive output circuit 17 are constituted by FET elements, it is possible to prevent the generation of noise due to a back electromotive voltage due to reactance and a gap caused by deterioration of the contact as in the prior art. it can.

Further, the chattering prevention circuit 14 is configured with a logic circuit in which the trip command is given priority even when the trip command and the close command are input simultaneously, so that chattering can be prevented.

On the other hand, the operation panel 18 has a personal computer interface so that information can be transferred to and from the personal computer 19.
Can be set for each circuit, and the operating state of the simulated circuit breaker 12 can be transferred to the personal computer 19 for monitoring and recording.

[0037]

As described above, according to the present invention, it is possible to perform a functional test with various operation delays accurately and promptly without malfunction, thereby testing a simple and compact protective relay device. Equipment can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a test device for a protective relay device according to the present invention.

FIG. 2 is a circuit diagram showing a configuration example of an operation command input circuit of FIG. 1;

FIG. 3 is a circuit diagram showing a configuration example of a chattering prevention circuit in FIG. 1;

FIG. 4 is a time chart showing the operation of the simulated circuit breaker of the embodiment.

FIG. 5 is a circuit diagram showing a specific example of a sequence of the protection relay device and a circuit breaker operation circuit.

FIG. 6 is a block diagram showing a conventional test apparatus for a protective relay device using a simulated circuit breaker.

[Explanation of symbols]

 11 Protective relay device 12 Simulated circuit breaker 13 Operation command input circuit 14 Anti-chattering circuit 15 Operation delay time setting circuit 16 Flip-flop circuit 17 Response output circuit 18 Personal computer Operation panel with interface 19 PC

Claims (4)

[Claims] When a trip command or a close command is input from a protection relay, an operation command input means for dividing the command and outputting the divided command as an insulated command signal, and a command signal input from the operation command input means. , Chattering prevention means for preventing chattering due to simultaneous input of a trip command and a close command, operation delay time setting means for setting an operation delay time of a trip or close operation command input from the chattering prevention means, and an operation delay time Storage means for holding a trip or close operation command for the operation delay time set in the setting means, response output means for outputting a response output by the trip or close operation command held in the storage means to the protection relay, The operation command input unit, the operation delay time setting unit, the storage unit, and the response A test device for a protective relay device, comprising: an operation panel for setting various output means. 2. A test device for a protective relay device according to claim 1, wherein the operation command input means gates on with a drive current set by a power supply setting circuit and outputs an operation command input current; A test device for a protective relay device, comprising: a Peltier device that absorbs heat generated by current flowing through the device and radiates heat. 3. The protection relay test apparatus according to claim 1, wherein the chattering prevention means has a trip command priority function of giving priority to the trip command and outputting the trip command when the trip command and the close command are input simultaneously. Test equipment for protection relay device. 4. The test apparatus for a protective relay device according to claim 1, wherein the operation panel has a personal computer interface, and information can be transferred between the personal computer and the externally installed personal computer through the personal computer interface. Test equipment for protective relays.