KR101668434B1 - Monitoring system for electric power apparatus - Google Patents

Monitoring system for electric power apparatus Download PDF

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Publication number
KR101668434B1
KR101668434B1 KR1020150082872A KR20150082872A KR101668434B1 KR 101668434 B1 KR101668434 B1 KR 101668434B1 KR 1020150082872 A KR1020150082872 A KR 1020150082872A KR 20150082872 A KR20150082872 A KR 20150082872A KR 101668434 B1 KR101668434 B1 KR 101668434B1
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KR
South Korea
Prior art keywords
power
circuit breaker
power source
facility
current
Prior art date
Application number
KR1020150082872A
Other languages
Korean (ko)
Inventor
이진락
Original Assignee
주식회사유성계전
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Publication date
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Priority to KR1020150082872A priority Critical patent/KR101668434B1/en
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Publication of KR101668434B1 publication Critical patent/KR101668434B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
    • G01R11/02—Constructional details
    • G01R11/25—Arrangements for indicating or signalling faults
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/185—Electrical failure alarms
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/02—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage

Abstract

The present invention relates to an apparatus for monitoring the presence or absence of a power facility using an operation power source, A signal input section for receiving an operation signal of the circuit breaker to detect an operation time of a circuit breaker for shutting off a main power source of the power system; A signal analyzer for analyzing an operation time of an operation signal input through the signal input unit and determining whether there is an abnormality in the electric power facility, and a display unit for displaying abnormality information of the electric power facility determined through the signal analyzer And the like.
According to the present invention, it is possible to check the sound state of the electric power facility by using the current value flowing through the AC / DC operation power source circuit for operation of the electric power facility, so that the operation state of the breaker can be easily checked by the operation current, The reliability can be improved.

Description

Technical Field [0001] The present invention relates to a monitoring system for electric power apparatus,

The present invention relates to an apparatus for monitoring the presence or absence of a power facility using an operation power source, and more particularly, to an apparatus for monitoring the presence or absence of a power facility by monitoring the current and resistance value of the operation power source circuit The present invention relates to an apparatus for monitoring the presence or absence of a power facility using an operating power source.

Generally, the transmission voltage transmitted through the transmission line is converted from the substation to the distribution voltage, and the converted distribution voltage is supplied to the customer through the distribution line.

Power facilities are provided for the operation and protection of such power transmission and distribution systems, and can be confirmed through the disclosure of Japanese Patent Laid-Open Nos. 10-2012-0136952 and 10-2011-0119150.

Currently, protection of power system over 154kV of super high voltage is performed by monitoring the voltage and current value measured in the transformer (PT) and instrumental current transformer (CT) of the instrument and shutting off the circuit in the protection relay. , Current fault waveform and breaker operation time can be confirmed by fault event signal.

On the other hand, in the power system, voltage and current magnitude values and operating states are confirmed by a protection relay. Circuit breaker used in low-voltage power supply circuit It is possible to check the operation status of circuit breaker, switch, etc. with the current flowing in the operation power supply (AC / DC operation, monitoring, etc.) circuit. Normally, (Wiring breaker) The rated capacity (no specification) is largely applied. When a large current is generated due to a breaker operation part hanging, a coil burnout interlayer shorting, a coil disconnection grounding, etc. in the operation circuit, even if an instantaneous or continuous current flows, the MCCB part operation does not reach the rated current. There is a large damage loss.

In other words, the existing power system has been analyzed by the protection relay and the fault recorder. However, the electric power system such as the circuit breaker, disconnecting switch, ATS (automatic switching switch), switchgear It is impossible to constantly analyze the operating conditions of the power equipment (equipment), and thus it is impossible to confirm whether the power equipment (equipment) is in a normal operation state or a ready state (input, shutdown).

Reference literature: Patent No. 10-2012-0136952 Reference literature: Published patent application No. 10-2011-0119150

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above problems, and it is an object of the present invention to provide a power supply control apparatus and a control method thereof, The present invention also provides an apparatus for monitoring the presence or absence of a power plant using the apparatus.

Particularly, the present invention can analyze the trend of the operating current size and operation time delay phenomenon of the electric power facilities such as the electric power facilities, the breakers, and the switches through the operation current of the operation power source, And to provide a device for monitoring the presence or absence of a power facility using a power source.

In order to solve such a technical problem,

A signal input unit for receiving an operation signal of the circuit breaker to detect an operation time of the circuit breaker for blocking the main power of the power system; A signal analyzer for analyzing an operation time of an operation signal inputted through the signal input unit and an operation current to determine whether there is an abnormality in the power equipment, and a display unit for displaying abnormality information of the power equipment determined through the signal analyzer The present invention also provides an apparatus for monitoring the presence or absence of a power facility using an operation power source.

At this time, in order to detect the closing state and the trip ready state of the circuit breaker in real time, a resistance detecting unit for detecting the resistance value of the closing coil of the circuit breaker, the circuit breaker b, and the a contact circuit .

The operation power source is a DC power source or an AC power source.

In addition, the power detecting unit includes a current and voltage analyzer of the operating power source.

The signal analyzer compares an operation current detected by the power detector with an operation time inputted through the signal input unit with an established steady state power consumption and an operation time threshold, And outputs information on the presence or absence of the electric power facility.

In addition, a communication unit for transmitting the abnormality information of the electric power facility to a remote site is further included.

According to the present invention, it is possible to check the sound state of the electric power facility by using the current value flowing through the AC / DC operation power source circuit for operation of the electric power facility, so that the operation state of the breaker can be easily checked by the operation current, The reliability can be improved.

Particularly, the present invention detects the operation time until the operation and change-over of the circuit breaker and detects the change of the current value (increase or decrease) and the operation time delay state with the electric power facility aging and various obstacles. And it is possible to detect the accidental phenomenon beforehand, so that stable power supply can be expected through the power system.

In addition, according to the present invention, since the operation circuit state of the circuit breaker, the switch, and the like is always monitored by the resistance value, it is possible to confirm whether or not the operation circuit is normal, which is advantageous for maintenance of the electric power facility.

Particularly, in the present invention, since the new substation uses the penetration type CT to detect the current of the operation power source and the existing substation uses the clamp type CT, the unnecessary loss in the system can be reduced, It can be applied to all panels such as extra high voltage, high voltage, low voltage, MCC, and distribution panel with power circuit.

1 is a configuration diagram of an apparatus for monitoring the presence or absence of a power facility using an operation power source according to the present invention.
FIG. 2 is a view for explaining the state of the breaker signal control and monitoring of the normal presence / absence monitoring apparatus for power equipment using the operation power source according to the present invention.
3 is a control flowchart of an apparatus for monitoring the presence or absence of a power facility using an operation power source according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It should be understood that various equivalents and modifications may be present.

FIG. 1 is a diagram showing an apparatus for monitoring the presence or absence of a power facility using an operation power source according to an embodiment of the present invention, in which a DC power source or an AC power source is used as an operation power source.

The apparatus for monitoring the presence or absence of a power facility using an operating power source according to the present invention described below is advantageous in protecting facilities by analyzing currents and trends flowing through the operation power source circuit and selecting a rated current, Thereby enabling stable power supply through the power system.

Referring to FIG. 1, an apparatus 100 for monitoring the presence / absence of a power facility using an operating power source according to the present invention includes an electric power facility such as an ultra-high voltage circuit breaker (Circuit Breaker), an ATS Operation for Operation By analyzing the trend of the operating current size and operation time delay phenomenon of the power equipment through the operation current of the power supply (1), it is possible to check whether the power equipment is normal or not, It is possible to detect the accident occurrence phenomenon beforehand, and it is possible to perform stable power supply.

The apparatus 100 for monitoring the presence or absence of a power facility using the operation power supply according to the present invention includes a power detector 110 for detecting an operation current of the operation power source 1 supplying power to the power facility operation circuit, A signal input unit 120 for receiving an operation signal of the circuit breaker 2 to detect an operation time of the circuit breaker 2 for blocking the main power of the main power source, A signal analyzer 130 for analyzing the operation time of the operation signal inputted through the signal analyzer 130 to determine whether there is an abnormality in the power facility, And a display unit 140.

The apparatus for monitoring the presence or absence of a power facility using the operation power supply may further include an input coil of the circuit breaker 2 to be closed in response to a closing state of the circuit breaker 2, And a resistance detection unit (150) for detecting a resistance value at the coil, the circuit breaker b contact, and the a contact circuit.

Hereinafter, the configuration of each part will be described in detail.

First, the operation power supply 1 supplies operation power for driving the electric power facility. The operation power source 1 receives the DC power or the AC power and drives the apparatus 100 for monitoring the presence / absence of the electric power facility using the operation power according to the present invention. And a power supply unit for converting the power supply to the power supply.

In the meantime, the present invention includes a power detector 110 to determine whether a stable operation of a power facility is being performed, and detects an operation current of the power source 1. At this time, it is preferable that the power detector 110 always detects an operation current for driving a power equipment (apparatus) through an ammeter.

In the present invention, the power detector 110 monitors the supply voltage of the operation power source 1, and monitors the load power supplied to the power facility through the voltage analyzer.

Therefore, it is preferable that the power detector 110 employs a configuration in which an operation current and an operation voltage signal detected through a current and voltage analyzer are input.

The signal input unit 120 receives an operation signal of the circuit breaker 2 to detect an operation time of the circuit breaker 2 that is responsible for breaking the main power of the power system. The operation signal of the circuit breaker 2 inputted through the signal input unit 120 is input to the signal analyzer 130 to monitor the operation time of the operation signal.

The signal analyzer 130 analyzes an operation current detected by the power detector 110 and an operation time input through the signal input unit 120 to determine whether the power equipment is abnormal. It detects the operation time until the current flowing in the equipment (equipment) is switched, and monitors the state transition of the current value fluctuation (increase) and the operation time delay state by the power equipment age and various obstacles.

More specifically, the AC / DC operating power supply 1 of the power plant is used to set the steady-state power consumption and the operating time as a threshold value (reference value).

In this case, the signal analyzer 130 includes a memory for storing the steady state power consumption and the operation time threshold. For this purpose, the signal analyzer 130 includes a microcomputer.

Therefore, the signal analyzer 130 can calculate the power consumption increase value and the operation delay time in the abnormal state due to various obstacle factors, the occurrence of the coil breakage layer short circuit, the coil breakage ground occurrence, (The reference value), and when it is out of the set value, it is judged as abnormal, and the abnormality information of the electric power facility including the alarm and the state is outputted.

Such abnormal information of the electric power facility is displayed through various display units 140 such as LCD, LED, and the like. In this case, the abnormality information of the electric power facility may include information obtained by analyzing the voltage, current waveform record, and the like. In addition, when an anomaly occurs, the alarm is displayed through the display unit 140, but it is preferable to further include a buzzer (not shown) to output an alarm sound.

Meanwhile, the present invention further includes an output unit 170 for directly outputting information on abnormality of the electric power facility. If necessary, an external memory or a notebook or the like may be connected to the controller so that the manager can directly download the abnormality information of the electric power facility . Of course, the output 170 may also be capable of outputting alarms and trip signals for system monitoring and control.

The apparatus for monitoring the presence or absence of a power facility using the operation power supply according to the present invention further includes a communication unit 180 for transmitting information on the presence or absence of the power facility to a remote location.

At this time, the communication unit 180 can perform data transmission in the RS485 communication mode or data communication in order to transmit information to the normal presence / absence monitoring apparatus of other power facilities so as to enable serial data communication.

Of course, the communication unit 180 may also be configured as a short-range or long-distance wireless communication module in addition to the wired system, so that the abnormality information of the power facility can be wirelessly transmitted.

Meanwhile, the resistance detector 150 detects a state where the circuit breaker 2 is turned on and off, a contact state of a coil b and a contact b of the CB, It is possible to monitor the closing state and the trip ready state of the circuit breaker 2 in real time by detecting and analyzing the resistance value of the input coil, the blocking coil, the circuit breaker b contact and the a contact circuit.

Of course, the resistance detector 150 transmits a resistance value detected and inputted from the resistance detection sensor 152 to the signal analyzer 130 and analyzes the resistance value in the signal analyzer 130, By monitoring the circuit status at all times, it is possible to check in real time whether the circuit breaker is normal or not, and the ready state of closing and tripping in real time.

Hereinafter, with reference to FIG. 1 to FIG. 3, a specific monitoring process of the power equipment of the power plant normal monitoring apparatus using the operating power source according to the present invention will be described.

First, the state of the operating power supply 1 supplied to the power equipment (equipment) is checked at normal times.

In this case, the state of the operating power source 1 is detected through the power detecting unit 110, and the operating current and voltage for driving the power equipment (instrument) are detected.

After the steady state power consumption and the operating time of the AC or DC operating power supply 1 are detected during the initial operation of the power equipment, the steady state power consumption and the operating time are set as a threshold value (reference value) in the memory. )

Thereafter, the operation current of the operation power source 1 is monitored through the power detection unit 110 in accordance with the closing (closing) operation and the trip operation (S3) of the circuit breaker 2, (Close and Trip) times of the signal input unit 2 are analyzed and analyzed. (S4)

In this case, the analysis of the monitoring information is analyzed by dividing it by the normal, overcurrent, undercurrent, no current, and the like when the circuit breaker 2 is turned on and the cut-off coil is excited, It can be judged as normal, overcurrent, undercurrent or the like in accordance with the detection of the operation start and completion time.

In this manner, it is possible to determine whether or not the electric power facility is abnormal through the analysis of the closing time and the trip time of the signal to the circuit breaker 2. (S5)

In this case, it is preferable to compare the power plant with a predetermined threshold value (reference value) through normal operation and periodic inspection to determine whether or not the power plant is abnormal.

In particular, when the signal analysis of the power equipment is out of a predetermined ratio or more of a threshold value (reference value), an alarm can be output so that the manager can recognize the alarm. Such an alarm is displayed through the display unit 140. (S6)

Of course, the abnormality information of the electric power facility can be transmitted through the communication unit 180 to a remote control center or to a normal presence / absence monitoring apparatus of another electric power facility adjacent thereto.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. The scope of protection of the present invention should be construed under the following claims, and all technical ideas within the scope of equivalents thereof should be construed as being included in the scope of the present invention.

1: Operation power supply 2: Circuit breaker
100: normal presence / absence monitoring device 110: power source detection section
112: current and voltage meter 120: signal input
130: Signal analysis unit 140:
150: resistance detection unit 170:
180:

Claims (7)

A power detecting unit for detecting an operating current of the operating power source for driving the electric power equipment;
A signal input unit for receiving an operation signal of the circuit breaker to detect an operation time of the circuit breaker for blocking the main power source of the power system,
A signal analyzer for analyzing an operation time of an operation signal input through the signal input unit and an operation current detected by the power detector to determine whether the power facility is abnormal;
A display unit for displaying information on abnormality of the electric power facility determined through the signal analyzer,
And a resistance detector for detecting a resistance value of an input coil of the circuit breaker, a blocking coil and a circuit breaker b, and a contact circuit to detect the closing state and the trip ready state of the circuit breaker in real time,
The signal analyzer compares an operation current detected by the power detector with an operation time inputted through the signal input unit with a set steady state power consumption and an operation time threshold to determine an abnormality if the set value is exceeded, And the abnormality information of the facility is output.
delete The method according to claim 1,
Wherein the operating power source is a DC power source or an AC power source.
The method according to claim 1,
Wherein the power detector includes a current and voltage analyzer for measuring a supply current and a voltage of the operation power supply.
delete The method according to claim 1,
Further comprising an output unit for directly outputting information on the abnormality of the power plant.
The method according to claim 1,
Further comprising a communication unit for transmitting the abnormality information of the power facility to a remote location.
KR1020150082872A 2015-06-11 2015-06-11 Monitoring system for electric power apparatus KR101668434B1 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010038183A (en) * 1999-10-22 2001-05-15 김종욱 Apparatus for controling and monitoring operation of electric equipment
KR20060061310A (en) * 2006-02-21 2006-06-07 한국전력공사 Electronic wattmeter capable of power distribution line and the fault monitoring method thereby
KR20070044419A (en) * 2007-04-06 2007-04-27 (주) 동보파워텍 System for digital diagnosising circuit breaker motion time of measurement and method therefor
KR20100001926A (en) * 2008-06-27 2010-01-06 주식회사유성계전 Apparatus for monitoring of circuit breaker in power system
KR20110119150A (en) 2010-04-26 2011-11-02 엘에스산전 주식회사 Device for protecting under voltage of digital protection relay and control method therefor
KR20120136952A (en) 2011-06-10 2012-12-20 한국전력공사 System and method for monitoring ground fault of high resistance

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010038183A (en) * 1999-10-22 2001-05-15 김종욱 Apparatus for controling and monitoring operation of electric equipment
KR20060061310A (en) * 2006-02-21 2006-06-07 한국전력공사 Electronic wattmeter capable of power distribution line and the fault monitoring method thereby
KR20070044419A (en) * 2007-04-06 2007-04-27 (주) 동보파워텍 System for digital diagnosising circuit breaker motion time of measurement and method therefor
KR20100001926A (en) * 2008-06-27 2010-01-06 주식회사유성계전 Apparatus for monitoring of circuit breaker in power system
KR20110119150A (en) 2010-04-26 2011-11-02 엘에스산전 주식회사 Device for protecting under voltage of digital protection relay and control method therefor
KR20120136952A (en) 2011-06-10 2012-12-20 한국전력공사 System and method for monitoring ground fault of high resistance

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