KR20200091977A - Apparatus and method for determining power loss of electric demand - Google Patents

Abstract

Disclosed are an apparatus for determining a power failure in a customer premises and a method thereof. The apparatus for determining a power failure in a customer premises of the present invention comprises: a watt-hour meter which reads metering information on power supplied to customers; a line state detection unit which detects whether a line connected to the customer has a power failure; and a management server determining whether the customer is in a power failure state in the premises by an under voltage relay (UVR) operation in accordance with the metering information detected by the watt-hour meter, when the line state detected by the line state detection unit is in a state restored after the power failure.

Description

Apparatus and method for determining power failure in consumer premises{APPARATUS AND METHOD FOR DETERMINING POWER LOSS OF ELECTRIC DEMAND}

The present invention relates to an apparatus and method for determining a power outage in a customer premises, and more specifically, determining whether the customer is in a power outage state by operation of UVR even after recovering from a power line based on the collected metering information by collecting metering information from a wattmeter. It relates to an apparatus and method for determining a power failure in a consumer premises.

The Digital Protection Relay uses a 16-bit microprocessor to protect the system from various accidents on the line, such as overcurrent, short circuit, and ground faults, and uses high-performance protection algorithms that could not be implemented in existing inductive or stationary protection relays. It is an implemented device. In addition, the digital protection relay has various additional functions such as a self-diagnosis function, malfunction recording function, and SOE (Sequence of Event) function, which facilitates accident analysis and provides excellent reliability.

This digital protection relay is equipped with a low current protection function (OCR; Over Current Relay), an over voltage protection function (OVR; Over Voltage Relay), and a low voltage protection function (UVR; Under Voltage Relay). When there is an abnormality, the line is opened and closed through a line breaker.

In particular, the UVR is sequenced by setting the operating value and operating time of the circuit breaker (Circuit Breaker), dead voltage level, and auto reset.

UVR sends a VCR (Voltage Circuit Breaker) trip signal after the set operating time when the voltage level detected at the second stage of the instrument transformer falls below the first reference value (operation value) set by the user at the normal voltage level. Output will open the line.

In this case, the UVR on the customer's side operates the VCB in the event of a line outage (operation when the power outage time lasts for 6 to 10 seconds or more to prevent operation in all outages), and for a number of reasons, including operator safety and emergency generator shutdown even after a line outage recovery. The VCB is not automatically input and is manually operated by the customer's own safety manager.

As a result, even though the KEPCO line was recovered from power failure, there has been a case where the supply of electricity to customers is delayed due to the blocking of VCB by the customer's own UVR operation.

Background art of the present invention is disclosed in the'outage management device and method' of Republic of Korea Patent Publication No. 10-2018-0023661 (2018.03.07).

The present invention was devised to improve the above-mentioned problems, and an object according to an aspect of the present invention is to collect electricity from the electricity meter and collect electricity from the electricity meter. An object of the present invention is to provide an apparatus and method for determining a power failure in a consumer.

An apparatus for determining a power failure in a consumer premises according to an aspect of the present invention includes: a power meter for reading metering information about power supplied to the consumer; A line state detection unit that detects whether a line connected to the consumer is out of power; And a management server that determines whether a customer is in a power failure state by an under voltage relay (UVR) operation according to the metering information detected by the wattmeter when the line state detected by the line state detection unit is restored after a power failure. It is characterized by including.

The electricity meter of the present invention includes a metering information meter reading the metering information; And the metering information detected by the metering meter reading unit includes a metering information transmitting unit that transmits the metering information to the management server through a wired or wireless communication network.

The management server of the present invention includes a metering information receiving unit for receiving the metering information from the electricity meter; A line state determination unit receiving line state information from the line state detection unit and determining whether the line is in a restored state after a power failure; And an on-site power failure determination unit that analyzes the metering information and determines the customer's premises information according to whether the UVR is operated when the line is restored after a power failure by the track status determination unit.

The on-site power failure determination unit of the present invention is characterized in that it determines whether the customer is in the power failure state on the basis of at least one of communication failure with the power meter, instantaneous current value, and power recovery event information.

If the power failure determination unit of the present invention is in poor communication with the watt-hour meter, or if the instantaneous current value is less than a preset value, or if no power recovery information is received, it is determined that the consumer is in the power failure status by repairing the UVR. It is characterized by.

A method for determining a power failure in a customer premises according to an aspect of the present invention includes: a meter reading a metering information on power supplied to the customer; A step of detecting whether the line state detecting unit is in a power outage of a line connected to the customer; And if the line state detected by the line state detection unit is restored after a power failure, the management server determines that the customer is in the premises by an under voltage relay (UVR) operation according to the metering information detected by the power meter. It characterized in that it comprises a step.

In the meter reading step of the present invention, the meter reads the metering information, and transmits the metered information to the management server through a wired or wireless communication network.

In the step of judging as a power outage in the consumer premises of the present invention, the management server receives the metering information from the watt-hour meter, receives the track status information from the track status detector, and determines whether the track is in a restored state after a power failure, If the line is in a restored state after a power outage, it is characterized by analyzing the metering information to determine whether the customer is in a power outage state according to whether the UVR is operating.

In the step of judging as the customer premises power outage of the present invention, the management server determines the customer premises power outage through at least one of communication failure with the power meter, instantaneous current value, and power recovery information.

In the step of judging as the customer premises power outage of the present invention, the management server is in a power outage state when communication with the wattmeter is poor, if the instantaneous current value is less than a preset value, or if no power recovery information is received. It is characterized by judging that.

According to an aspect of the present invention, an apparatus and method for determining a power failure in a customer's premises collects metering information from a watt-hour meter and determines whether the customer is in a power outage on the premises by the operation of UVR even after recovering a line based on the collected metering information. It prevents the power from being cut off to the consumer even after the power failure is restored.

An apparatus and method for determining a power failure in a customer premises according to another aspect of the present invention reduces time and cost of checking whether or not power is restored for each customer after power failure recovery, reduces manpower for guiding power failure recovery, and shortens power failure recovery time. Can.

1 is a view showing an overview of UVR operation according to an embodiment of the present invention.
2 is a block diagram of an apparatus for determining a power failure in a consumer premises according to an embodiment of the present invention.
3 is a flowchart of a method for determining a power failure in a consumer premises according to an embodiment of the present invention.

Hereinafter, an apparatus and method for determining a power failure in a consumer premises according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or practice. Therefore, the definition of these terms should be made based on the contents throughout the specification.

The implementation described herein can be implemented, for example, as a method or process, apparatus, software program, data stream or signal. Although discussed only in the context of a single form of implementation (eg discussed only as a method), implementation of the discussed features may also be implemented in other forms (eg, devices or programs). The device can be implemented with suitable hardware, software and firmware. The method can be implemented in an apparatus, such as a processor, generally referring to a processing device, including, for example, a computer, microprocessor, integrated circuit, or programmable logic device. The processor also includes communication devices such as computers, cell phones, portable/personal digital assistants ("PDAs") and other devices that facilitate communication of information between end-users.

1 is a view showing an overview of UVR operation according to an embodiment of the present invention.

Referring to FIG. 1, UVR (Under Voltage Relay) is installed in a customer (customer who installs a regular power receiving facility) that is supplied with a special high voltage to detect the low voltage of the line and block the VCB to provide a power receiving facility protection and an emergency generator start signal. Device.

During the line outage, the UVR on the customer's side operates a voltage circuit breaker (VCB). Accordingly, in order to prevent operation in all blackouts, the blackout time lasts for 6-10 seconds or more.

After recovery of the line outage, VCB is not automatically input due to various reasons such as operator safety and emergency generator stop, and is manually operated by the customer's own safety manager.

Accordingly, the apparatus for determining a power failure in the consumer premises according to the present embodiment determines whether the power failure in the consumer premises continues by operating the UVR continuously after the power failure is restored.

2 is a block diagram of an apparatus for determining a power failure in a consumer premises according to an embodiment of the present invention.

Referring to FIG. 2, an apparatus for determining a power failure in a customer premises according to an embodiment of the present invention includes a power meter 10, a line state detection unit 20, and a management server 30.

The watt-hour meter 10 reads metering information on power supplied to the consumer, and delivers the metered metering information to the management server 30.

The electricity meter 10 includes a metering information meter reading unit 11 and a metering information transmitting unit 12.

Metering information meter 11 detects the voltage and current applied to the load. At this time, the watt-hour meter 10 detects abnormal currents and abnormal voltages, analyzes overcurrent patterns before and after non-voltage occurrence, which is an electrical phenomenon that causes a power outage, and then recovers information (conversion time) and meter events (current phase loss) , Voltage phase loss), instantaneous current, instantaneous voltage, and other metering information can be read.

The metering information transmitting unit 12 transmits metering information metered by the metering information metering unit 11 to the management server 30 through various wired/wireless communication networks.

The power meter 10 may be a high-voltage electronic power meter that delivers metering information in real time. However, the watt-hour meter 10 is not particularly limited as long as it can read and transmit metering information.

The line state detection unit 20 is disposed on the line to detect line state information through whether the main switch is on or off, and transmits the detected line state information to the management server 30. The line state information is information on whether the line is currently in a power outage or recovery state. Accordingly, the management server 30 may determine whether the current line is in a power outage state or a restored state based on the line state information detected by the line state detection unit 20.

If the line state detected by the line state detection unit 20 is recovered after a power outage, the management server 30 determines whether the customer is in an on-premises power outage state by not recovering UVR according to the metering information detected by the power meter 10. do.

The management server 30 includes a metering information receiving unit 31, a line status determining unit 32, and a premises power failure determining unit 33.

The metering information receiving unit 31 receives metering information transmitted from the metering information transmitting unit 12 of the power meter 10.

The track status determination unit 32 determines whether the track is currently restored after a power failure using the track status information received from the track status detection unit 20.

The premises power failure determination unit 33 analyzes the metering information when the line is restored after a power failure by the line status determination unit 32 to determine whether the customer is in the premises by the operation of UVR.

In more detail, the on-site power failure determination unit 33 determines that a customer who has a communication failure state with remote information in a line that has been restored after a power failure occurs and a customer who does not have conquest information is a power failure.

In the case of the groundwater exhibition room, a repeater is installed in order for the metering information transmitter 12 to perform communication normally. Most of the power of the repeater uses power from the secondary side of the transformer, so the line is normal (UV power is normally supplied to the VCB) during UVR operation (normal power supply to the VCB), but the power of the repeater is not supplied, so the metering information transmitter 12 has a poor communication status. Lasts. Accordingly, the on-site power failure determination unit 33 determines whether or not there is a power failure on the basis of the communication failure of the metering information transmitting unit 12, and in the case of communication failure, it is determined that the power of the customer is a power failure state in the customer premises by UVR operation. .

In addition, in the case of a consumer who has not successfully restored power, since the power recovery information is not recorded on the instrument, the premises power failure determination unit 33 cannot receive the corresponding power recovery information. Accordingly, if the power failure determination unit 33 does not transmit the conquest power, the power of the customer determines that the power of the customer is in the power outage state of the customer by UVR operation.

In addition, the premises power failure determination unit 33 determines that the instantaneous current transmitted from the watt-hour meter 10 is less than a preset value of 0.04 A (watt-hour meter 10, the MOF's own current consumption) as a customer outage due to UVR operation.

That is, even if the communication state of the metering information transmitting unit 12 is normal and the power recovery information is normally recorded, if the instantaneous current value of the power meter 10 is less than 0.04A, the VCB is blocked (load is normally supplied from the KEPCO line to the front end of the consumer VCB) As a result, the consumer cannot use the load normally. Accordingly, if the instantaneous power failure determination unit 33 has an instantaneous current value less than a set value, it is determined that the acceptance power is in the acceptance power failure state by the UVR operation.

Hereinafter, a method for determining a power failure in a consumer premises according to an embodiment of the present invention will be described in detail with reference to FIG. 3.

3 is a flowchart of a method for determining a power failure in a consumer premises according to an embodiment of the present invention.

Referring to FIG. 3, first, when a power failure occurs in the line, the UVR of the consumer operates (S10). Accordingly, a VCB (Voltage Circuit Breaker) operates.

Thereafter, the line is restored by an operator or the like, and at this time, the line state detection unit 20 detects the line state information and transmits the line state information to the management server 30. The management server 30 confirms that the line has been restored according to the line state information received from the line state detection unit 20 (S40).

On the other hand, the electricity meter 10 reads metering information on the power supplied to the consumer (S20), and transmits the metered metering information to the management server 30 (S30).

In this case, the watt-hour meter 10 may read metering information such as constant recovery information (conversion time), meter events (current phase loss, voltage phase loss), instantaneous current, and instantaneous voltage.

Meanwhile, the management server 30 receives the metering information detected by the watt-hour meter 10 in a state in which the track state detected by the track state detector 20 is recovered after a power failure (S50), and according to the metering information It is determined whether there is a power failure in the consumer premises due to non-UVR recovery (S60).

That is, the management server 30 determines that the customer is in a power failure state within the premises based on the communication failure of the metering information transmitting unit 12 on the line that has been restored after a power outage, and if the communication is bad, the customer is in the customer premises by UVR operation It is judged that the power is out.

In addition, the management server 30 determines that if the power recovery information is not transmitted from the metering information transmitting unit 12, the customer power is determined to be the customer's power outage due to UVR operation.

In addition, the management server 30 determines that the consumer is in a power failure state by the UVR operation when the instantaneous current transmitted from the watt-hour meter 10 is less than a preset value of 0.04 A (power-meter 10, MOF self-consumption current). do.

As described above, the apparatus and method for determining a power failure in a customer premises according to an embodiment of the present invention collects metering information from a watt-hour meter and determines whether the customer is in a power failure condition by the operation of UVR even after a power failure recovery on the basis of the collected metering information. On the basis of this, it prevents the power from being cut off to the consumer even after the power failure is restored.

An apparatus and method for determining a power failure in a customer premises according to another aspect of the present invention reduces time and cost of checking whether or not power is restored for each customer after power failure recovery, reduces manpower for guiding power failure recovery, and shortens power failure recovery time. Can.

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those skilled in the art to which the technology pertains are capable of various modifications and other equivalent embodiments. Will understand. Therefore, the true technical protection scope of the present invention should be defined by the claims below.

10: electricity meter 11: metering information meter reading
12: Weighing information transmission unit 20: Line condition detection unit
30: management server 31: weighing information receiving unit
32: track condition determination unit 33: premises power failure determination unit

Claims (10)

An electricity meter reading metering information about the power supplied to the consumer;
A line state detection unit that detects whether a line connected to the consumer is out of power; And
If the line state detected by the line state detection unit is a restored state after a power outage, a management server that determines whether a customer is in a power outage state by an under voltage relay (UVR) operation according to the metering information detected by the wattmeter A power failure judgment device in a consumer premises.
The watt-hour meter of claim 1,
A metering information meter reading unit for reading the metering information; And
The metering information detected by the metering information reading unit includes a metering information transmission unit for transmitting to the management server through a wired or wireless communication network, the customer premises power failure determination device.
The method of claim 1, wherein the management server
A metering information receiver for receiving the metering information from the watt-hour meter;
A line state determination unit receiving line state information from the line state detection unit and determining whether the line is in a restored state after a power failure; And
If the line is recovered after a power failure by the track status determining unit, the customer's power outage determination unit comprising an on-premises power failure determination unit that analyzes the metering information to determine the customer's premises information according to whether the UVR is operating.
The method of claim 1, wherein the premises power failure determination unit
A consumer power outage determination device, characterized in that for determining whether the consumer is in a power outage state through at least one of whether the communication with the watt hour meter, the instantaneous current value, and the power recovery event.
The method of claim 4, wherein the premises power failure determination unit
If the communication with the watt-hour meter is poor, the instantaneous current value is less than a preset value, or if no power recovery information is received, it is determined that the consumer is in an on-premises power outage state by not recovering UVR. .
A meter reading meter information about power supplied to the consumer;
A step of detecting whether the line state detecting unit is in a power outage of a line connected to the customer; And
If the management server detects that the line state detected by the line state detection unit is recovered after a power outage, determining that the customer is in the premises by an under voltage relay (UVR) operation according to the metering information detected by the power meter. A method of determining a power outage in a consumer premises comprising a.
According to claim 6, In the step of meter reading the electricity meter,
The electricity meter reading the metering information, and transmits the metered metering information to the management server through a wired or wireless communication network.
The method of claim 6, wherein in the step of judging by the consumer outage,
The management server receives the metering information from the watt-hour meter, receives the track status information from the track status detector, determines whether the track is in a restored state after a power failure, and analyzes the weighing information if the track is in a restored state after a power failure A method of determining a power outage in a customer premises, wherein it is determined whether the customer is in a power outage in the premises according to whether the UVR is operated.
The method of claim 6, wherein in the step of judging by the consumer outage,
The management server determines whether there is a failure in communication with the watt-hour meter, the instantaneous current value and the power recovery information, the consumer premises power failure determination method characterized in that it determines the power failure in the premises.
The method of claim 4, wherein in the step of judging that the consumer is a power failure in the premises,
The management server is a communication with the wattmeter is poor, if the instantaneous current value is less than a preset value, or if no congestion information is received, the consumer premises power failure determination method characterized in that it determines that the customer is in the premises.

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