KR101997536B1 - Apparatus for testing circuit integrity, Method thereof, and Computer readable storage medium storing the method - Google Patents

Abstract

Provided are a circuit integrity test device and a method thereof. The circuit integrity test device comprises: an input/output terminal unit (130) having a test probe (233) connected to a terminal of a power equipment circuit; and a comparison calculation unit (120) executing a circuit conduction test mode for the circuit using an output signal obtained from the input/output terminal unit (130) and determining whether the circuit conduction is performed as a result of the execution.

Description

Apparatus for testing circuit integrity, Method approximately, and Computer readable storage medium storing the method

The present invention relates to a circuit integrity test apparatus, and more particularly, to a circuit integrity test apparatus and method capable of eliminating the probability of failure due to human error and circuit connection error.

In case of alarm test during facility operation, ① design drawing and site check, ② terminal voltage measurement, ③ safety measure, and ④ field test. In ①, use the design drawing of the test object to check whether the terminal number, the cable burnout number, and the site wiring state match the design drawing. At this time, grasp the terminal number for alarm test and check the necessary points for safety measures for the hazardous circuit (trip circuit). In ②, confirm the alarm contact 48V in advance by checking the voltage at both ends before the conduction test. In (3), the terminal block cover and insulating tape are attached to the dangerous terminal side for physical and visual protection. Size-specific terminal block covers are to be provided to ensure safety measures under various site conditions. In ④, after conducting the conduction test in a pair of two people, the power supply terminal and the alarm terminal to be tested are conducted (COM) to generate an alarm. The alarm / status signal in continuity confirms the return alarm by disconnecting the terminal wiring.

In this monitoring / alarm test, there are two risk factors that can cause the equipment to trip.

Before the conduction test, check the voltage at both ends with the tester. The voltage level at both ends of the terminal block differs according to the type of circuit (monitoring / alarm, trip, control) as shown in the table below.

division watch Warning Control Trip Voltage level 48V 48V 24V 125 V

The tester is used according to the purpose of use by the voltage, current, and resistance mode, and the circuit may become conductive if the current and resistance mode are used incorrectly instead of the voltage mode. In order to prevent such equipment immature and illusion probabilities, a dedicated tester for conduction test is needed.

In addition, in conducting field test after checking voltage, if a dangerous circuit (trip circuit) is conducted by the illusion of the tester instead of the alarm / monitoring circuit, power failure may be caused. In order to prevent this problem, a dedicated test apparatus is required in which only the alarm monitoring circuit is turned on.

1. Korean Patent Publication No. 10-2000-0054059 2. Korean Patent Publication No. 10-2007-0037747 3. Korean Patent Publication No. 10-2016-0037375

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a circuit integrity test apparatus and method capable of fundamentally eliminating the probability of failure due to human error or circuit connection error, in order to solve the problems according to the background art.

It is another object of the present invention to provide a circuit health test apparatus and method in which only an alarm / monitoring circuit is conducted.

The present invention provides a circuit integrity test apparatus that can eliminate the probability of failure due to human error, circuit connection error in order to achieve the above problems.

The circuit integrity test device is.

An input / output terminal section having a test probe connected to a terminal of the power equipment circuit; And

And a comparison calculator configured to execute a circuit conduction test mode for the circuit using the output signal obtained from the input / output terminal unit, and determine whether the circuit conduction is performed as a result of the execution.

In this case, the circuit conduction test mode is characterized in that the input value according to the output signal and the specific reference region information specified in advance.

In addition, the input value may be maintained for a specific time to prevent an error.

In addition, the specific reference region information may be generated by selecting a specific voltage level that can be conducted or by directly inputting a range by a user.

The comparison calculation unit may further include a measurement test mode that functions as a voltmeter so that only the terminal voltage applied to both ends of the test probe can be measured.

The conduction test mode or metrology test mode may be selectively executed by a mode selection switch.

The circuit integrity test apparatus may further include a display configured to display whether the circuit is conductive.

The circuit integrity test apparatus may further include an acoustic indicator configured to output whether the circuit is conductive.

The circuit integrity test apparatus may further include a communication circuit configured to transmit an outside of the circuit conduction.

The input / output terminal unit may further include: a distribution circuit for distributing the output signal and supplying the output signal to a comparison calculation unit; And a switching circuit connected to the distribution circuit and configured to perform the circuit conduction.

In addition, the switching circuit may be characterized in that the auxiliary relay.

In addition, the switching circuit can be characterized in that the operation during the holding time of the output signal.

On the other hand, another embodiment of the present invention comprises the steps of: (a) obtaining an output signal from an input / output terminal section having a test probe connected to a terminal of a power equipment circuit; (b) the comparison calculation unit executing a circuit conduction test mode for the circuit using the output signal; And (c) determining, by the comparison calculation unit, a result of execution of the circuit conduction or not.

On the other hand, another embodiment of the present invention provides a computer readable medium storing program code for executing the circuit health test method described above.

According to the present invention, by implementing a state / monitoring test-only tester with a one-stop integrated function to enable simultaneous voltage measurement, operation test, and state determination, the probability of failure due to human error or circuit wiring error It can be removed at its source.

In addition, the present invention can be minimized the factors that can cause a failure due to errors in the design drawings, the error of the tester during the state / alarm test of the equipment in operation.

In addition, the present invention may be implemented in a compact (Portable) to be able to test anytime, anywhere.

1 is a block diagram of a circuit integrity test apparatus according to an embodiment of the present invention.
FIG. 2 is a circuit diagram of the circuit integrity test apparatus shown in FIG. 1.
3 is a conceptual diagram showing a circuit diagram of a general monitoring contact.
4 is a conceptual diagram illustrating a circuit diagram of a general trip contact.
FIG. 5 is a flowchart illustrating a process of processing a voltage input value in the comparison calculator shown in FIG. 1.
6 is a flow chart showing a process for preventing accidental failure according to an embodiment of the present invention.
FIG. 7 is a block diagram of a communication circuit added to the circuit integrity test apparatus shown in FIG. 1.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, only the embodiments are to make the disclosure of the present invention complete, and those skilled in the art to which the present invention pertains. It is provided to fully inform the scope of the invention, and the invention is defined only by the scope of the claims. The size and relative size of the components shown in the drawings may be exaggerated for clarity of explanation.

Like reference numerals refer to like elements throughout, and “and / or” includes each and all combinations of one or more of the items mentioned.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, the words “comprises” and / or “consisting of” components, steps, operations and / or elements mentioned do not exclude the presence or addition of one or more other components, steps, operations and / or elements. .

Although used to describe various components such as first and second, these components are of course not limited to these terms. These terms are only used to distinguish one component from another. Therefore, of course, the first component mentioned below may be the second component within the technical spirit of the present invention.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used in a sense that can be commonly understood by those skilled in the art. In addition, the terms defined in the commonly used dictionaries are not ideally or excessively interpreted unless they are specifically defined clearly.

Hereinafter, a circuit integrity test apparatus and method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a circuit integrity test apparatus 100 according to an embodiment of the present invention. Referring to FIG. 1, the circuit integrity test apparatus 100 includes a power supply 110, a comparison calculation unit 120 that operates by receiving power from the power supply 110, and an input / output terminal connected to a terminal of a power equipment circuit. 130 and the like.

The power supply 110 receives external use power and converts the DC power into a direct current (DC) voltage and supplies it to the comparison calculator 120. Of course, it is also possible to charge the power supply 110 by configuring a rechargeable battery.

The comparison calculation unit 120 executes a circuit conduction test mode for the circuit by using the output signal obtained from the input / output terminal unit 130 and performs a function of determining whether the circuit conduction is performed as a result.

The input / output terminal portion 130 is a portion directly connected to the terminal of the power equipment circuit. In other words, a test probe is configured at the front end, and both ends of the test probe are connected to terminals of the power equipment circuit. Power facility circuits are installed in power plants, substations, etc., and include various power devices such as generators, transformers, and switchgears.

In general, the integrity of equipment is verified through various test items such as individual characteristics test of equipment, interlocking test with other equipment, alarm operation test, and operation test after new / expansion of power equipment. Among them, when replacing remote monitoring / control equipment, test the operation of equipment such as breaker and disconnector, the operation of field equipment alarm circuit and normal display of analog values as shown in the table below.

Test Type Exam Content Monitoring and alarm test Remotely check the status of on-site facilities (ON, OFF) and normal operation in case of alarm Control test Remote monitoring of device status change when operating equipment on site and normal operation when operating on-site equipment at remote site Measurement test Whether the analog (kV, A, MW, MVAR, etc.) acquired in the field is displayed normally

Here, VAR represents Volt-Ampere Reactive.

The monitoring / alarm test during the test is to check the status (ON, OFF) of the field equipment (GIS (Gas-Insulated Switch), transformer, protection switchboard, etc.) and alarm in case of abnormality in the remote (monitor room, power supply branch). The purpose is to check if it can.

FIG. 2 is a circuit diagram of the circuit integrity test apparatus 100 shown in FIG. 1. Referring to FIG. 2, the power supply 110 includes a DC regulator 212 that converts to an appropriate voltage to drive a microprocessor when external power is applied. Of course, a disconnect switch 211 may be configured to block external power.

 The comparison calculator 120 includes a microprocessor unit 223 that operates by receiving a stable power from the DC regulator 212. The microprocessor unit 223 inputs source code using an ARDUINO program and the like, and performs an operation, control, and the like according to the source code.

In addition, the comparison calculator 120 may include a mode selection switch 221 for selecting a conduction test mode or a measurement test mode. The conduction test mode determines whether circuit conduction is performed by comparing an input value according to an output signal obtained from the input / output terminal unit 130 with specific reference region information specified in advance. The measurement test mode functions as a voltmeter so that only the terminal voltage across the test probe 233 can be measured.

The input / output terminal unit 130 includes a test probe 233 having both ends (+,-) connected to terminals of the power equipment circuit, a distribution circuit 232 for distributing an output signal and supplying the output signal to the comparison calculation unit 120. It is connected to the distribution circuit 232, and comprises a switching circuit 231 for performing the circuit conduction.

The distribution circuit 232 includes a first resistor R1 and a second resistor R2, and a positive diode is provided between the test probe 233 and the first resistor R1.

The switching circuit 231 may be an auxiliary relay (RELAY), but is not limited thereto, and may include a field effect transistor (FET), a metal oxide semiconductor FET (FET), an insulated gate bipolar mode transistor (IGBT), a power rectifying diode, and the like. The same semiconductor switching element, thyristor, gate turn-off (GTO) thyristor, triode for alternating current (TRIAC), silicon controlled rectifier (SCR), integrated circuit (IC) circuit, and the like may be used. In particular, in the case of a semiconductor device, a bipolar, a metal oxide silicon field effect transistor (MOSFET) device, or the like may be used. The power MOSFET device has a double-diffused metal oxide semiconductor (DMOS) structure, unlike ordinary MOSFETs, with high voltage and high current operation.

When the positive and negative test probes 233 are connected to the terminal block of the power equipment circuit for the conduction test, the voltage input value is input to the MPU 223 via the voltage divider 232. Becomes In order to prevent errors due to measurement shaking, the voltage input value should be maintained for about 1 second. If the input signal is within the voltage value set by the MPU 223, the coil of the auxiliary relay will be excited and the arrow The contact is short-circuited to form a circuit. However, if the input signal is out of the specified voltage range, the resistance across the circuit will reach several MΩ (R1 + R2), so the circuit will not conduct.

In order to set a predetermined voltage level at which the auxiliary relay can conduct in the comparison calculation unit 120, it may be directly input to the MPU 223, or may be input in advance through a select switch (not shown). The selected voltage level can also be selected.

The circuit integrity test apparatus 100 may include an acoustic indicator 250 that outputs a sound for an alarm function so that a user may know when the circuit conduction is made. The sound indicator 250 may be a buzzer, but is not limited thereto, and a small speaker may also be used.

In addition, the circuit integrity test apparatus 100 may include a display 200 for displaying various types of information such as a voltage across a probe, a selected voltage level, and whether or not to conduct.

The display 200 may be a liquid crystal display (LCD), a light emitting diode (LED) display, a plasma display panel (PDP), an organic LED (OLED) display, a touch screen, a flexible display, or the like.

3 is a conceptual diagram showing a circuit diagram of a general monitoring contact. Referring to FIG. 3, in the case of a monitoring contact, 24V and -24V (potential difference 48V) are respectively applied to terminal 1 and terminal 2 from the RTU (Remote Terminal Unit) 300, and when 86T operates, power is applied. The facility circuit 310 becomes conductive. At this time, the voltage between terminal 32 and terminal 38 becomes zero, and the closed circuit is formed, and the alarm that the 86T is operated is sent to the RTU remotely. If the 86T does not work, no alarm is issued because the circuit is not configured between the 32 and 38 terminals.

4 is a conceptual diagram illustrating a circuit diagram of a general trip contact. Referring to FIG. 4, in the case of a trip contact, 62.5V and -62.5V (potential difference 125V) are applied to terminal 1 and terminal 61 from the GIS (Gas Insulated Switchgear), and the circuit is turned on when 86T is operated. do. At this time, the voltage between terminal 1 and terminal 61 becomes 0 and the closed circuit is configured, and the 125V voltage excites 52TC (TRIPCOIL) so that the circuit breaker 441 of the GIS 440 opens.

3 and 4, in the case of FIG. 3, only the alarm signal is sent remotely when the monitoring contact is turned on, but in FIG. 4, the breaker is actually opened when the contact is turned on in the trip contact. have. In the normal alarm test, in case of Fig. 3, the terminal 32 and 38 of the monitoring contact are connected to each other to check the circuit connection status and the appropriateness of the alarm output through the alarm signal coming up remotely. However, if terminal 1 and terminal 61 are inadvertently conducted by the tester, the breaker will open by tripping the trip coil.

Therefore, in conducting field test after voltage check, if a dangerous circuit (trip circuit) is conducted by the tester's illusion instead of an alarm / monitoring circuit, power failure may be caused.

In order to prevent this problem, in one embodiment of the present invention, only the alarm / monitoring circuit is turned on.

5 is a flowchart illustrating a process of processing a voltage input value to the comparison calculator 120 shown in FIG. 1. A probe is used to make contact with the test terminal block. If the voltage measurement is within the range after the contact is maintained for a certain time (500ms) for a stable test such as image stabilization, the relay operates for 500ms.

Referring to FIG. 5, the comparison calculator 120 receives a voltage input value from the input / output terminal unit 130 and maintains it for a predetermined time to operate the circuit (step S510).

Thereafter, the comparison calculator 120 outputs an output signal from the microcontroller unit 223 only to a specific voltage region designated by the user, and does not output an output signal outside the designated voltage region (step S520). In other words, the specific voltage range specified by the user is set to the minimum voltage and the maximum voltage. Therefore, if the voltage input value is within these minimum and maximum voltage ranges, the output signal is emitted. If it is out of this range, no output signal is output.

When the output signal is received from the comparison calculation unit 120, the input / output terminal unit 130 operates the auxiliary relay to conduct the circuit, and does not operate the voltage outside the specified voltage range (step S530). Of course, the input value holding time (about 500 ms) and the auxiliary relay operating time (about 500 ms) are preferably set to be the same, but it is also possible to set differently.

6 is a flow chart showing a process for preventing accidental failure according to an embodiment of the present invention. Referring to FIG. 6, a two-step accident prevention process is implemented. First, the tester function is set to voltage mode, eliminating factors that can cause current to flow in the tester current mode and resistance mode. Secondly, the circuit is configured to be conducted in a predetermined voltage range.

With continued reference to FIG. 6, the circuit integrity test apparatus 100 is installed on the target power equipment circuit side, and it is checked whether the voltage at both ends thereof is outside the specified voltage range that the monitoring / alarm circuit can conduct (steps S610 and S620).

If the voltage at both ends is not appropriate in step S620, it is recognized that it is not an alarm circuit, the test is stopped, and the design drawing and the terminal number of the power equipment circuit are reconfirmed (step S621).

On the other hand, if the voltage at both ends is appropriate in step S620, it is determined whether the circuit is conducted at the specified voltage (step S630). If the power equipment circuit is out of the specified voltage in step S630 to recognize that it is not an alarm circuit, the test is stopped and the drawings and terminal numbers are reconfirmed (step S621).

In contrast, when the power equipment circuit is within the specified voltage range in step S630, an automated test is started (step S640).

In other words, conduction is conducted in the 48V band which is the voltage region of the monitoring / alarm circuit, and operation is not performed in 125V which is the other trip circuit voltage region. In addition, the display has a function of displaying the voltage value and the circuit conduction, and generates a buzzer sound during the normal operation of the circuit. Therefore, it is possible to implement a one-stop integration function that can simultaneously use voltage measurement, operation test, and status determination.

FIG. 7 is a block diagram in which a communication circuit 710 is added to the circuit integrity test apparatus 100 shown in FIG. 1. Referring to FIG. 7, the test history and the result information may be automatically transmitted through the communication circuit 710 by incorporating IoT (Internet of Things) technology.

The communication circuit 710 is connected to a wired and / or wireless communication network to transmit test details and result information to the outside. The network refers to a connection structure capable of exchanging information between respective nodes such as a plurality of terminals and servers. Examples of such a network include a 3rd Generation Partnership Project (3GPP) network, a Long Term Evolution (LTE) network, 5th Generation Partnership Project (5GPP) Network, World Interoperability for Microwave Access (WIMAX) Network, Internet, Local Area Network (WLAN), Wireless Local Area Network (WLAN), Wide Area Network (WAN), Personal (PAN) Area Network, Wibro (Wireless Broadband), WiFi (Wireless Fidelity), HSDPA (High Speed Downlink Packet Access), Bluetooth (Bluetooth) Network, Near Field Communication (NFC) Network, Satellite Broadcast Network, Analog Broadcast Network, DMB (Digital) Multimedia Broadcasting) network, etc., but is not limited thereto.

In addition, the steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied in a program instruction form that can be executed by various computer means and recorded in a computer-readable medium. The computer readable medium may include program (instruction) code, data file, data structure, etc. alone or in combination.

The program (command) code recorded on the medium may be those specially designed and configured for the present invention, or may be known and available to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs, DVDs, Blu-rays, etc., and ROMs and RAMs. Semiconductor memory devices specifically configured to store and execute program (command) code, such as RAM), flash memory, and the like.

Here, examples of program (instruction) code include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

100: circuit health test device
110: power supply
120: comparison calculation unit
130: input and output terminal

Claims (17)

An input / output terminal section 130 having a test probe 233 connected to a terminal of a power equipment circuit; And
And a comparison calculation unit 120 which executes a circuit conduction test mode for the circuit by using the output signal obtained from the input / output terminal unit 130 and determines whether the circuit conduction is performed as a result.
The circuit conduction test mode compares an input value according to the output signal with predetermined reference region information, and the specific reference region information is generated by selection of a specified voltage level to be conducted or by a direct range input of a user. ,
The circuit is energized when the output signal is conducted only in a predetermined designated voltage region according to the predetermined specific reference region information so that the circuit is energized and is not operated for a voltage outside the specified voltage region. Integrity test device.
delete The method of claim 1,
Wherein said input value is maintained for a specified time to prevent errors.
delete The method of claim 1,
The comparison calculator (120) further comprises a measurement test mode functioning as a voltmeter to measure only the terminal voltage across the test probe (233), characterized in that the circuit integrity test device.
The method of claim 5,
Wherein the conduction test mode or metrology test mode is selectively executed by a mode selection switch (221).
The method of claim 1,
And a display (200) indicating whether the circuit is conductive. The method of claim 1,
And a sound indicator (250) for outputting the circuit conduction.
The method of claim 1,
And a communication circuit (710) for transmitting externally whether the circuit is connected.
The method of claim 1,
The input / output terminal unit 130 includes: a distribution circuit 232 for distributing the output signal and supplying the output signal to the comparison calculation unit 120; And
And a switching circuit (231) connected to said distribution circuit (232) for carrying out said circuit conduction.
The method of claim 10,
And the switching circuit (231) is an auxiliary relay.
The method of claim 10,
And the switching circuit (231) operates during the holding time of the output signal.
(a) the comparison calculation unit 120 obtaining an output signal from the input / output terminal unit 130 having a test probe 233 connected to the terminal of the power equipment circuit;
(b) the comparison calculation unit 120 executing a circuit conduction test mode for the circuit using the output signal; And
and (c) determining, by the comparison calculation unit 120, a result of the execution of circuit conduction.
The circuit conduction test mode compares an input value according to the output signal with predetermined reference region information, and the specific reference region information is generated by selection of a specified voltage level to be conducted or by a direct range input of a user. ,
The circuit is energized when the output signal is conducted only in a predetermined designated voltage region according to the predetermined specific reference region information so that the circuit is energized and is not operated for a voltage outside the specified voltage region. Health test method.
delete The method of claim 13,
Wherein said input value is maintained for a specified time to prevent errors.
delete A computer-readable medium storing program code for executing the circuit health test method according to any one of claims 13 and 15.

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