KR101509149B1 - Smart gateway - Google Patents

Abstract

A smart gateway is disclosed. The smart gateway includes a compound sensing unit connected to a load side of a distribution board to generate at least one of voltage, current, leakage current, temperature, humidity, and arc data to generate sensing data; A metering unit for calculating a maximum demand peak power by measuring a load side power consumption for a predetermined time; Calculating total power quality data and phase-specific power quality data using the sensing data, calculating a predicted power using the maximum demand peak power, comparing the predicted power with a target power, A central processing unit for determining whether to block or not; And a monitoring interrupting unit for interrupting and supplying power supplied to the distribution board and the phase according to the control of the central processing unit.

Description

Smart Gateway {SMART GATEWAY}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a smart gateway, and more particularly , to a smart gateway installed in a distribution board to provide various status information in a distribution board and to control the same.

Electricity usage information in each home or building is read from the installed digital meter and sent to the data concentrator unit (DCU), and the data collection unit (DCU) And the electricity usage information of the corresponding home is transmitted to the gateway using Power Line Communication (PLC).

The gateway uses power line communication (PLC) to collect power usage information from the data collection unit (DCU) or at least one sub meter installed in the home or building, and calculates the power usage Derive information.

However, these gateways are currently installed in a home or a building in a building and use only data measured through various sensors to calculate power-related parameters and provide only standardized information such as power consumption, real-time charge, and estimated charge information.

In addition, while surveillance for overloads and short circuits is carried out in the distribution panel, there is a problem that fire prevention measures by arc monitoring are not carried out on their own, and thus the blocking function is separately provided.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a fire-prevention function through a circuit breaker function, a leakage prevention function and an arc monitoring, and to provide various power parameters for the entire distribution board and each phase- And to provide a smart gateway capable of preventing excessive usage charges by automatically cutting off power supply.

According to an aspect of the present invention, a hybrid sensing unit is connected to a load side of a distribution board to detect at least one of voltage, current, leakage current, temperature, humidity, and arc data to generate sensing data. A metering unit for calculating a maximum demand peak power by measuring a load side power consumption for a predetermined time; Calculating total power quality data and phase-specific power quality data using the sensing data, calculating a predicted power using the maximum demand peak power, comparing the predicted power with a target power, A central processing unit for determining whether to block or not; And a monitoring interceptor for performing interception and supply of power supplied to the distribution board and phase according to the control of the central processing unit.

The compound sensing unit may include at least one of a transformer, a current transformer, a video current transformer, a temperature sensor, a humidity sensor, and an arc sensor.

The compound sensing unit may be separately installed on the load line for each phase of the lower stage.

The arc sensor detects an arc generation using an optical fiber and transmits a trip signal to the central processing unit. The central processing unit compares the trip signal with a predetermined arc generation reference value to determine whether to output an alarm signal.

The arc sensor detects an arc occurrence using an optical fiber and transmits a trip signal to the central processing unit. The central processing unit compares the trip signal with a predetermined arc generation reference value to detect a power source or phase It is possible to determine whether or not the power supplied to the star load line is cut off.

An amplifying unit for amplifying the size of the sensing data; And an analog-to-digital converter converting the amplified sensing data into a digital value and transmitting the digital value to the central processing unit.

The central processing unit can perform error correction on the numerical value of the sensing data converted into the digital value using the experimentally calculated compensation constant.

The overall power quality data may include at least one of voltage, current, phase, frequency, active power, reactive power, apparent power, power factor, temperature, humidity and carbon dioxide emission of the entire distribution panel.

The central processing unit can determine whether to shut off the power supplied to the distribution panel using the total power quality data.

The phase-specific power quality data may include at least one of voltage, current, leakage current, phase, frequency, active power, reactive power, apparent power, power factor and carbon dioxide emission for each phase.

The central processing unit can determine whether to shut off the power supplied to the phase-by-phase load line by using the phase-specific power quality data.

The central processing unit calculates the predicted power using a variation amount of the maximum demand peak power, and can cut off the power supplied to the distribution board when the predicted power exceeds the target power.

The central processing unit may determine whether to shut off the power supplied to the phase-by-phase load line according to a predetermined priority.

The central processing unit may control to supply power to the distribution board when the predicted power is equal to or less than the target power.

And a surge protector provided on a power supply side of the distribution board.

The smart gateway of the present invention can provide various power parameters for the entire distribution panel and the load line of each phase by providing a function of a distribution circuit breaker, a leakage prevention function and a fire prevention function through an arc monitoring, It is possible to prevent the excess use charge by automatically shutting off the power supply.

1 is an external view of a smart gateway according to an embodiment of the present invention;
2 is a configuration block diagram of a smart gateway according to an embodiment of the present invention, and Fig.
3 to 6 are conceptual diagrams illustrating a configuration of a display unit of a smart gateway according to an embodiment of the present invention.

The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated and described in the drawings. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms including ordinal, such as second, first, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and redundant description thereof will be omitted.

FIG. 1 is an outline view of a smart gateway according to an embodiment of the present invention, and FIG. 2 is a block diagram of a configuration of a smart gateway according to an embodiment of the present invention.

1 and 2, a smart gateway 100 according to an exemplary embodiment of the present invention includes a compound sensing unit 111, a metering unit 112, a central processing unit 113, an amplification unit 114, A digital conversion unit 115, a memory unit 116, a communication unit 117, a display unit 118, a monitoring cutoff unit 119, a surge protection unit 120, and a user interface unit 121 .

First, the compound sensing unit 111 is installed on the load side of the distribution board and can generate at least one of voltage, current, leakage current, temperature, humidity, and arc data to generate sensing data.

The composite sensing unit 111 includes a transformer for detecting the load voltage, a current transformer for detecting the load current, a video current transformer for detecting the leakage current on the load, a temperature sensor for detecting the temperature inside the distribution board, And an arc sensor for detecting whether or not an arc is generated inside the distribution board.

Each of the sensors constituting the compound sensing unit 111 may be installed in a load line to be introduced into the distribution board in phases (R, S, T, N) to generate sensing data for each phase.

However, in the case of temperature and humidity, temperature and humidity data of the entire inside of the panel board are important, so that one can be installed in each panel board.

The arc sensor can be installed in each phase-by-phase load line to perform arc-by-phase arc detection. The arc sensor can detect the occurrence of an arc by distinguishing a parallel arc generated between a phase-specific load line, a midline line, and a ground line, or a series arc occurring on a neutral line. The arc sensor, for example, uses an optical fiber to sense arc generation and generate a trip signal.

The operation of the arc sensor can be determined depending on the temperature inside the distribution board. For example, when the temperature data sensed by the temperature sensor installed in the distribution board exceeds a certain value, the arc sensor can be set in advance to operate.

The sensing data generated by the compound sensing unit 111 is amplified in size through the amplification unit 114 and converted into a digital value through the analog-digital conversion unit 115 and transmitted to the central processing unit 113.

The metering unit 112 can calculate the maximum demand peak power by measuring the amount of power usage on the load side for a predetermined time. The metering section 112 may be configured to include at least one of an E-TYPE meter, a Smart-meter and a high-pressure meter, for example, which are mounted in a module form.

The metering unit 112 may calculate at least one of the current date and time, the LP (Load Profile) data, the current cumulative guideline value, and the maximum demand peak power.

The LP data is acquired from the meter as many times as the number of data to be requested for each item according to the request time in minutes and stored in the memory unit, and can be transmitted through the communication unit 117 upon request of the external system.

The current cumulative guideline value is data on the total electricity consumption used from the time when the meter is installed to the present, and may include, for example, active power / active power amount, reactive power / reactive power amount, apparent power, and power factor data.

The maximum demand peak power means the maximum peak value for the average power consumption for a predetermined time, for example, the maximum demand time (15 minutes). The maximum demand peak power is a value obtained by converting the cumulative usage amount during the maximum demand time in units of one hour, for example, by multiplying the accumulated usage power value during the maximum demand time of 15 minutes by four.

The maximum demand peak power can be stored in the memory unit and managed by dividing into the immediately preceding maximum demand peak power, the daily maximum demand peak power, the monthly maximum demand peak power, and the year maximum demand peak power.

The central processing unit 113 may use a compensation constant to perform error correction of the sensing data converted into the digital value. The central processing unit 113 can perform error correction by, for example, multiplying the experimentally calculated compensation constant by the sensing data converted into the digital value. The compensation constant can be calculated experimentally through a precision instrument.

The central processing unit 113 may compare the trip signal generated by the arc sensor with a predetermined arc generation reference value to determine whether the power supplied to the distribution panel or the power supplied to the load line for each phase is blocked.

Alternatively, the central processing unit 113 may determine whether to output an alarm signal by comparing the trip signal generated by the arc sensor with a preset arc generation reference value.

That is, the central processing unit 113 may compare the predetermined arc generation reference value with the trip signal value to determine whether to interrupt the power supply or output the alarm signal. At this time, the predetermined arc generation reference value, which is a reference, May be previously set numerically in advance and stored in the memory unit 116. For example, the criterion for fire occurrence is set to 100, the reference value for alarm occurrence is set to 70, and the reference value for power shutoff is set to 90, As shown in FIG.

Alternatively, the predetermined arc generation reference value may be automatically calculated or updated by calculating an average of the trip signal generated from the arc sensor for a predetermined period of time.

The central processing unit 113 can calculate the overall power quality data and the phase-by-phase power quality data using the sensing data.

The overall power quality data may comprise at least one of, for example, voltage, current, phase, frequency, active power, reactive power, apparent power, power factor, temperature, humidity and carbon dioxide emission of the entire distribution board.

The phase-specific power quality data may comprise at least one of voltage, current, leakage current, phase, frequency, active power, reactive power, apparent power, power factor and carbon dioxide emission for each phase.

The central processing unit 113 may compare each numeric data of the total power quality data with predetermined panel board risk numerical data to determine whether or not to shut off the power supplied to the distribution board.

In addition, the central processing unit 113 compares each numerical data of the phase-by-phase power quality data with the predetermined phase-by-phase risk numerical data to determine whether or not to shut off the power supplied to the load line for each phase.

The central processing unit 113 can calculate the predicted power by using the maximum demand peak power calculated by the metering unit 112. [ The central processing unit 113 can calculate the predicted power that can be consumed for a predetermined time in the future using the change amount of the maximum demand peak power calculated every predetermined time. For example, the predicted power can be calculated by comparing the maximum demand peak power for the immediately preceding 30 minutes with the maximum demand peak power for the immediately preceding 15 minutes. The target power means a target value which is set to a value equal to or less than the value of the target power in proportion to the contracted power of the power consumer. The reference power means a reference value of the power consumption used during the set demand time, and it means the usage amount of the current demand time with respect to the set demand time of the target power amount.

The central processing unit 113 may cut off the power supplied to the phase-by-phase load line when it is determined that the predicted power exceeds the target power. At this time, the central processing unit 113 can cut off the power supplied to the phase-by-phase load line according to the predetermined priority order.

The central processing unit 113 continuously calculates the predicted power even when the power supply is interrupted. When the predicted power is determined to be equal to or lower than the target power, the central processing unit 113 can control power to be supplied to the disconnected load line.

In addition, the central processing unit 113 can output an alarm signal when the instantaneous power currently used exceeds a predetermined reference power.

The communication unit 117 can perform data communication with an external system through an Ethernet interface through a RJ-45, a wireless AP, a Wi-Fi, a PLC, ZigBee, and RF communication. The communication unit 117 can transmit power related data to an external energy management system (EMS) or receive control commands, for example.

The surge protection unit 120 may protect the smart gateway from a surge voltage or the like through a fuse installed on the phase-wise power line and a varistor built in the phase-wise power line and the neutral line. .

The display unit 118 can display various data related to the electric power according to the external operation inputted from the user interface unit 121. [

3 to 6 are conceptual diagrams illustrating a configuration of a display unit of a smart gateway according to an embodiment of the present invention.

Referring to FIG. 3, the display unit 118 according to an embodiment of the present invention displays the power usage, the target power, the reference power, the power charge, the predicted power, Data relating to the current power, the maximum peak (maximum demand peak power), and the metering information can be externally displayed.

Referring to FIG. 4, a display unit 118 according to an embodiment of the present invention generates voltage, current, temperature, humidity, phase, frequency, and overvoltage related to a power quality (PQ) , The overcurrent generation, the active power, the active power amount, the reactive power, the reactive power amount, the apparent power, the power factor, the arc occurrence, and the leakage occurrence occurrence can be externally displayed.

Referring to FIG. 5, the display unit 118 according to an embodiment of the present invention includes a device number, a facility name, a facility status, an instantaneous usage amount, an accumulated usage amount , The control-related information can be displayed externally.

6, a display unit 118 according to an exemplary embodiment of the present invention may include an operation mode setting, a network setting, a reference value setting, a blocking setting, and the like related to power management (PM) Can be displayed externally.

As used in this embodiment, the term " portion " refers to a hardware component such as software or an FPGA (field-programmable gate array) or ASIC, and 'part' performs certain roles. However, 'part' is not meant to be limited to software or hardware. &Quot; to " may be configured to reside on an addressable storage medium and may be configured to play one or more processors. Thus, by way of example, 'parts' may refer to components such as software components, object-oriented software components, class components and task components, and processes, functions, , Subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. The functions provided in the components and components may be further combined with a smaller number of components and components or further components and components. In addition, the components and components may be implemented to play back one or more CPUs in a device or a secure multimedia card.

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 present invention as defined by the following claims It can be understood that

100: Smart Gateway
111: Compound sensing unit
112:
113: central processing unit
114:
115: analog-to-digital conversion section
116:
117:
118:
119:
120: Surge protection unit
121:

Claims (15)

A hybrid sensing unit connected to a load side of the distribution board and detecting at least one of voltage, current, leakage current, temperature, humidity, and arc data to generate sensing data;
A metering unit for calculating a maximum demand peak power by measuring a load side power consumption for a predetermined time;
Calculating total power quality data and phase-specific power quality data using the sensing data, calculating a predicted power using the maximum demand peak power, comparing the predicted power with a target power, A central processing unit for determining whether to block or not; And
A monitoring interrupter for interrupting and supplying power to the power distribution board and the phase-fed power supply under the control of the central processing unit;
An amplifying unit for amplifying the size of the sensing data; And
And an analog-to-digital converter for converting the amplified sensing data into a digital value and transmitting the digital value to the central processing unit,
And the central processing unit performs error correction on the numerical value of the sensing data converted into the digital value by using the experimentally calculated compensation constant.
The method according to claim 1,
The hybrid sensing unit includes:
Wherein the smart gateway comprises at least one of a transformer, a current transformer, a video current transformer, a temperature sensor, a humidity sensor, and an arc sensor.
3. The method of claim 2,
And the compound sensing unit is separately installed on load lines for each phase of the lower stage.
3. The method of claim 2,
Wherein the arc sensor detects an arc generation using an optical fiber and transmits a trip signal to the central processing unit,
Wherein the central processing unit compares the trip signal with a preset arc generation reference value to determine whether to output an alarm signal.
3. The method of claim 2,
Wherein the arc sensor detects an arc generation using an optical fiber and transmits a trip signal to the central processing unit,
Wherein the central processing unit compares the trip signal with a preset arc generation reference value to determine whether the power supplied to the distribution panel or the power supplied to the load line for each phase is blocked.
delete delete The method according to claim 1,
Wherein the overall power quality data comprises at least one of voltage, current, phase, frequency, active power, reactive power, apparent power, power factor, temperature, humidity and carbon dioxide emission of the entire distribution panel.
9. The method of claim 8,
Wherein the central processing unit determines whether to shut off power supplied to the distribution board using the total power quality data.
The smart gateway according to claim 1, wherein the phase-specific power quality data includes at least one of voltage, current, leakage current, phase, frequency, active power, reactive power, apparent power, power factor and carbon dioxide emission for each phase.
11. The method of claim 10,
Wherein the central processing unit determines whether to shut off power supplied to each phase-by-phase load line using the phase-specific power quality data.
The method according to claim 1,
Wherein the central processing unit calculates the predicted power using a variation amount of the maximum demand peak power and blocks the power supplied to the distribution board when the predicted power exceeds the target power.
13. The method of claim 12,
Wherein the central processing unit determines whether to shut off the power supplied to the load line for each phase according to a predetermined priority.
13. The method of claim 12,
And the central processing unit controls to supply power to the distribution board when the predicted power is equal to or less than the target power.
The method according to claim 1,
And a surge protector provided on a power supply side of the distribution board.

Images