Energy harvesting-based power black box and the control method thereof

Abstract

An energy harvesting-based power black box is disclosed. The energy harvesting-based power black box includes an integrated CT unit that detects alternating current and temperature flowing through a busbar and generates an induced current based on the alternating current; a harvesting unit that converts the generated induced current into a DC voltage and converts or stores the DC voltage into a voltage for circuit driving; a communication unit that communicates with a server; an alarm unit including an LED and a buzzer; and a processor that analyzes harmonics, power imbalance / reverse phase, and leakage current based on the alternating current, controls the LED and buzzer differently based on the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature, and predicts power quality and measurement diagnostic results of a wiring board, distribution board, and motor control board by analyzing accumulated time-series data regarding the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature. Accordingly, even if the external power supply is cut off, the power black box can operate independently based on the voltage stored through the energy harvesting circuit to accurately determine and respond to abnormal phenomena, and data loss can be prevented by analyzing power parameters in a time series and storing them without interruption, and user convenience is enhanced by transmitting the analysis results to a user terminal device for visualization.

Description

Technology Field

[0001] The present invention relates to an energy harvesting-based power black box and a control method thereof, and more specifically, to an energy harvesting-based power black box and a control method thereof that performs energy harvesting based on current flowing through a busbar and diagnoses the power quality status by detecting and analyzing current, temperature, and environmental information in real time. Background Technology

[0002] In modern industry, the use of various power loads (inverters, SMPS, etc.) is increasing due to the expansion of energy efficiency and automation systems, leading to various power quality issues in the power grid.

[0003] Typical power quality abnormalities include harmonic generation and current imbalance, and such power abnormalities can shorten the lifespan of power equipment or become a direct cause of fire and electric shock accidents.

[0004] In particular, as the nonlinear characteristics of the load become stronger, severe harmonics are generated. This causes excessive heat to be generated in busbars, circuit breakers, and power cables within power distribution facilities, acting as a factor that increases the risk of electrical fires. Furthermore, an unbalanced state of three-phase loads can cause mechanical vibration, motor burnout, and energy loss, while reverse-sequence power can cause reverse rotation or malfunction of motors, leading to fatal consequences for industrial facilities.

[0005] Most existing measurement systems designed to detect and assess such power quality issues in advance rely on external power sources; consequently, in the event of a power outage, measurement functions cease and data is lost, making it difficult to accurately trace the causes before and after the incident.

[0006] Furthermore, existing measuring instruments are structured to provide only simple measurement values ​​from fixed locations, often lacking built-in state determination algorithms or having limited capabilities for analyzing factors such as harmonics. Additionally, there was a problem with the insufficient functionality to safely store, analyze, or transmit data at the time of anomalies, forced tripping by MCCBs, or power outages.

[0007] Accordingly, there is an increasing need to reliably store, analyze, and transmit information on power parameters even when abnormal phenomena occur or external power is cut off. The problem to be solved

[0008] The objective of the present invention is to provide an energy harvesting-based power black box and a control method thereof that performs energy harvesting based on current flowing through a busbar, and diagnoses the power quality status by detecting and analyzing current, temperature, and environmental information in real time. means of solving the problem

[0009] An energy harvesting-based power black box according to one embodiment of the present invention for achieving such objectives comprises: an integrated CT unit that detects alternating current and temperature flowing through a busbar and generates an induced current based on the alternating current; a harvesting unit that converts the generated induced current into a DC voltage and converts or stores the DC voltage into a voltage for circuit driving; a communication unit that communicates with a server; an alarm unit including an LED and a buzzer; and a processor that analyzes harmonics, power imbalance / reverse phase, and leakage current based on the alternating current, controls the LED and buzzer differently based on the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature, and predicts power quality and measurement diagnostic results of a wiring board, a distribution board, and a motor control board by analyzing accumulated time-series data regarding the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature.

[0010] Here, the integrated CT unit is formed as an integrated structure including a transformer (TR), detects a magnetic field generated by an alternating current flowing through the busbar through the core of the transformer, and can generate the induced current through an induced voltage induced in an auxiliary coil within the transformer.

[0011] In addition, the harvesting unit further includes a power storage unit and can supply the voltage stored in the power storage unit to the processor when the external power is cut off.

[0012] In addition, the processor may assign time values ​​to the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature to store them as time-series data, and provide the stored time-series data to the server to be used for power quality analysis.

[0013] Additionally, the processor may continuously light a green LED if the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature are within a first preset range, continuously light a blue LED and sound the buzzer at a first preset period if they are within a second preset range, and flash a red LED and sound the buzzer at a second preset period if they are within a third preset range.

[0014] In addition, the processor can blink a yellow LED when the external power is cut off, light up the green and yellow LEDs simultaneously when the external power is restored, and transmit stored time-series data to the server through the voltage stored in the power storage unit during the period of the external power cut-off.

[0015] Additionally, the processor counts the number of judgments for generating a Trip signal for circuit interruption if the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature are within the second preset range, and if the number of judgments is greater than or equal to the preset number or if the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature are within the third preset range, it generates and immediately outputs the Trip signal for circuit interruption and can store information regarding the time and cause of the generation of the Trip signal for circuit interruption as time-series data.

[0016] In addition, the integrated CT unit further includes an environmental sensor that detects humidity or gas, and the processor can store the data sensed through the environmental sensor as time-series data.

[0017] Meanwhile, a control method for an energy harvesting-based power black box according to one embodiment of the present invention comprises the steps of: detecting an alternating current flowing through a busbar and a temperature; generating an induced current based on the alternating current; converting the generated induced current into a DC voltage and converting or storing the DC voltage into a voltage for driving a circuit; analyzing harmonics, power imbalance / reverse phase, and leakage current based on the alternating current; and controlling an LED and a buzzer differently based on the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature. Effects of the invention

[0018] According to various embodiments of the present invention as described above, even if the external power supply is cut off, the power black box can operate independently based on the voltage stored through the energy harvesting circuit to accurately determine and respond to abnormal phenomena, and data loss can be prevented by analyzing power parameters in a time series and storing them without interruption, and user convenience is increased by transmitting the analysis results to a user terminal device for visualization. Brief explanation of the drawing

[0019] FIG. 1 is a block diagram illustrating the configuration of an energy harvesting-based power black box according to one embodiment of the present invention. FIG. 2 is a drawing illustrating the specific configuration of an integrated CT unit according to one embodiment of the present invention. FIG. 3 is a diagram illustrating the data processing and power provision process of each component of an energy harvesting-based power black box according to an embodiment of the present invention. FIG. 4 is a diagram illustrating an example of control conditions for controlling an LED and a buzzer according to an embodiment of the present invention. FIG. 5 is a flowchart illustrating a control method for an energy harvesting-based power black box according to an embodiment of the present invention. FIG. 6 is a block diagram illustrating the specific configuration of the energy harvesting-based power black box shown in FIG. 1. FIG. 7 is a drawing relating to a software module stored in a storage unit according to an embodiment of the present invention. Specific details for implementing the invention

[0020] The present invention will be described in more detail below with reference to the drawings. Furthermore, in describing the present invention, detailed descriptions of related known functions or configurations are omitted if it is determined that such detailed descriptions would unnecessarily obscure the essence of the invention. Additionally, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intentions or relationships of the user or operator. Therefore, their definitions should be based on the content throughout this specification.

[0021] FIG. 1 is a block diagram illustrating the configuration of an energy harvesting-based power black box according to one embodiment of the present invention.

[0022] Referring to FIG. 1, an energy harvesting-based power black box (100) according to one embodiment of the present invention may include an integrated CT unit (110), a harvesting unit (120), a communication unit (130), an alarm unit (140), and a processor (150).

[0023] Here, the energy harvesting-based power black box (100) relates to a non-contact type power black box installed in a distribution board, a distribution board, or a motor control board, and is capable of performing power quality monitoring, environmental information collection, data preservation in case of power outage, location-based mobile control via QR code, power management platform, etc., in combination, and in particular, is a black box device or system capable of detecting abnormal power conditions such as harmonics and reverse phase within the power system and supplying power to the device itself through non-contact energy harvesting.

[0024] Such a black box device or system may be installed as a separate configuration from a distribution board, switchboard, or motor control board, or may be implemented as part of a distribution board, switchboard, or motor control board.

[0025] The integrated CT unit (110) can detect alternating current and temperature flowing through the busbar and generate an induced current based on the alternating current.

[0026] Meanwhile, the alternating current according to one embodiment of the present invention may include an integrated four-phase alternating current (three-phase (A, B, C) and neutral (N) current), three-phase power (R-phase, S-phase, T-phase or A-phase, B-phase, C-phase) and at least one single-phase three-wire, and may include not only such alternating current but also direct current from photovoltaic power generation.

[0027] However, in this specification, it is assumed that the alternating current is a four-phase alternating current, and the description will be explained in detail.

[0028] Here, the integrated CT (Current Transformer) section (110) is formed as an integrated structure including a transformer (TR, Transformer), and can detect a magnetic field generated by a four-phase alternating current flowing through a busbar through the core of the transformer and generate an induced current through an induced voltage induced in an auxiliary coil within the transformer.

[0029] Generally, the CT section is a current transformer that measures high current in a non-contact manner and converts it into low current, and is used as an input for current measurement and protection relays, and the TR section is a device that transmits AC voltage or current from the primary side to the secondary side in a magnetic induction manner and is configured separately, but the integrated CT section (110) according to one embodiment of the present invention is not a simple measurement sensor but incorporates a transformer core (TR) structure for energy harvesting inside, and is configured with a separate coil to generate a harvesting voltage.

[0030] Specifically, the integrated CT unit (110) may include a sensing coil and an auxiliary coil for harvesting within a single core, the sensing coil extracts a measurement signal for RMS current value, phase analysis, etc., and the auxiliary coil can generate an induced voltage by inducing electromagnetic waves from the alternating current passing through the core of the current transformer (CT).

[0031] Additionally, the integrated CT unit (110) can measure the three-phase (A, B, C) and neutral (N) currents flowing through the busbar for each phase and provide a measurement signal to the processor (150) that can analyze harmonics, imbalances, reverse phases, etc., and can detect the magnetic field generated by the three-phase (A, B, C) and neutral (N) currents flowing through the same busbar through the core of the transformer and generate an induced current through the induced voltage induced in the auxiliary coil within the transformer.

[0032] Additionally, the integrated CT unit (110) may include a temperature sensor for detecting the temperature of each phase busbar, and such a temperature sensor may be installed together with a sensing coil and an auxiliary coil.

[0033] In this way, the integrated CT unit (110) according to one embodiment of the present invention can integrally perform measurement and power induction functions within a single core, and accordingly, the energy harvesting-based power black box (100) can integrally perform current detection, power generation, data analysis, and alarm control.

[0034] Meanwhile, the harvesting unit (120) can convert the generated induced current into a DC voltage and convert or store the DC voltage into a voltage for driving the circuit.

[0035] Additionally, the harvesting unit (120) further includes a power storage unit, and can supply the voltage stored in the power storage unit to the processor (150) when the external power is cut off. Accordingly, even if the external power is cut off, the processor (150) can drive the circuit so that the power black box (100) does not shut down and can store information about power parameters without interruption through the power supplied from the harvesting unit (120).

[0036] Specifically, the harvesting unit (120) can convert the induced current generated in the integrated CT unit (110) into a DC voltage by performing diode rectification and filtering, and can reduce the converted DC voltage to a voltage level required for circuit operation (e.g., 5V, 3.3V, 12V, etc.).

[0037] And, the harvesting unit (120) provides the DC voltage that has been lowered in this way to the alarm unit (140) or the processor (150), so that even when the external power is cut off, the processor (150) can perform the process of detecting and analyzing the four-phase alternating current and temperature flowing through the busbar, and can control the alarm unit (140) based on the analysis results to display the current state of the energy harvesting-based power black box (100).

[0038] In addition, as described above, the harvesting unit (120) does not use the voltage-dropped DC voltage only for driving the circuit, but the remaining power may also be stored in a power storage unit implemented with a lithium polymer battery or a supercapacitor.

[0039] Accordingly, the harvesting unit (120) can drive the processor (150), RTC (Real-Time Clock), alarm unit (140), etc., using the voltage stored in the power storage unit in the event of an external power cut or power outage.

[0040] Meanwhile, as described above, the power storage unit may include a lithium polymer battery, a supercapacitor, or a DC buffer circuit, etc. The lithium polymer battery is a rechargeable battery and typically has a voltage range of DC 3.7V to 4.2V and can be used as a driving power source for the processor (150), RTC, and alarm unit (140) in the event of a power outage. The supercapacitor is a high-capacity capacitor for fast charging and discharging and has a voltage range of DC 2.5V to 5.5V and can be used as an auxiliary power source for instantaneous current supply or booting. The DC buffer circuit is a circuit for voltage drop or overvoltage prevention and has a voltage of DC 5V or 12V and can be utilized for driving the output terminal after voltage stabilization.

[0041] For example, the harvesting voltage stored in the power storage unit can be output as a 5V DC voltage and provided to the processor (150), RTC, alarm unit (140), etc., and can be output as a 3.3V DC voltage and provided to some sensors or low-power MCU cores, etc., and when boosted output as a 12V DC voltage, it can be provided to drive the MCCB (Molded Case Circuit Breaker) Trip Coil described later, and when output as a 4.2V DC voltage, it can be provided to charge a lithium polymer battery.

[0042] In addition, for example, when the alternating current flowing through the busbar is 300A (60Hz), the voltage induced in the auxiliary coil of the integrated CT unit (110) is approximately 50 to 60V AC (varies according to relative magnetic field strength), and the induced voltage can be rectified in the harvesting unit (120) to convert it to DC 50V and then stepped down to convert it to 5V or 12V, at which time the average harvesting power is 0.5 to 1.5W, making it sufficient to drive the circuit for normal operation.

[0043] Meanwhile, the communication unit (130) can communicate with a server, specifically through Ethernet or LAN, or through Bluetooth, and the communication unit (130) can transmit various time series data of power parameters to which time information generated through the processor (150) is added to the server or user terminal device to visualize and display through a user interface, or provide the results of analyzing information of various power parameters to be displayed through various graphic user interfaces.

[0044] In addition, by using the aforementioned Bluetooth and Ethernet methods in an integrated manner, a server or user terminal device may be enabled to provide an augmented reality-based UI.

[0045] In addition, the communication unit (130) may receive line integration measurement information by linking with an external measuring instrument through the RS-485 communication method.

[0046] Additionally, the alarm unit (140) may include an LED and a buzzer, and may display information by illuminating different colors through the LED or adjusting the blinking cycle even for the same color, and output a "beep" sound through the buzzer, and may display information by adjusting the duration or output cycle of the buzzer sound.

[0047] Meanwhile, the processor (150) analyzes harmonics, power imbalance / reverse phase and leakage current based on the four-phase alternating current flowing through the busbar, controls the LED and buzzer differently based on the analyzed harmonics, power imbalance / reverse phase, leakage current and the detected temperature, and analyzes the accumulated time series data regarding the analyzed harmonics, power imbalance / reverse phase, leakage current and the detected temperature to predict the power quality and measurement diagnosis results of the wiring board, distribution board, and motor control board.

[0048] Specifically, the processor (150) can assign time values ​​to the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature to store them as time series data, and provide the stored time series data to a server to be used for power quality analysis.

[0049] That is, the processor (150) can analyze accumulated time series data regarding analyzed harmonics, power imbalance / reverse phase, leakage current and detected temperature, and predict the power quality of the wiring board, distribution board, and motor control board based on pattern information, numerical information, change amount information, etc. of the accumulated time series data, and predict the measurement diagnosis results for the four-phase alternating current flowing through the busbar.

[0050] For example, the processor (150) can collect information regarding the four-phase alternating current (A, B, C, N phases) flowing through the busbar, the busbar temperature, humidity or gas obtained through an environment sensor, voltage, power factor, harmonics, etc., perform harmonic analysis by comparing the average values ​​of the 3rd, 5th, and 7th harmonics, determine warning / trip conditions based on whether the busbar temperature exceeds a preset temperature, analyze power imbalance / reverse phase, or determine whether there is an abnormal leakage current by linking with a ZCT (Zero-phase Current Transformer).

[0051] Meanwhile, harmonics refer to frequency components that are integer multiples of the fundamental frequency (60Hz), and the major harmonics that appear in power systems are usually the 3rd (180Hz), 5th (300Hz), and 7th (420Hz) harmonics, which are generated by non-linear loads (inverters, SMPS, LEDs, etc.).

[0052] The processor (150) performs high-speed sampling of the current waveform of the 4-phase alternating current measured by the integrated CT unit (110), performs windowing processing to remove noise by applying window functions such as Hann and Hamming, performs FFT, extracts each harmonic component such as 60Hz, 180Hz, 300Hz, and 420Hz, calculates the Total Harmonic Distortion (THD) for each harmonic, that is, how much distortion the harmonic causes compared to the fundamental wave, and can compare the calculated result with the average harmonic value.

[0053] Additionally, the processor (150) can calculate the current imbalance of the three-phase (A, B, and C phases) currents among the four-phase alternating currents flowing through the busbar using the following mathematical formula 1, and such three-phase current imbalance can cause problems such as motor vibration, deterioration, and reduced efficiency because the current magnitudes of each phase are different.

[0054]

[0055] That is, the processor (150) collects the three-phase current and calculates the average value, and can generate a warning indicator if the deviation from the average value is, for example, 10% or more, and a Trip signal for circuit interruption if it is 15% or more.

[0056] Additionally, the processor (150) can analyze the reverse phase of the three-phase current, specifically by calculating the phase difference between each phase to analyze the phase angle, and determines that it is normal if each phase difference is maintained at 120˚, and if it deviates from this, it can perform a warning display or generate a Trip signal for circuit interruption.

[0057] Additionally, the processor (150) can measure the vector sum of the three-phase currents (A, B, and C phases) measured by the integrated CT unit (110) and determine the calculated value as leakage current if the sum is not zero, and can control the LED to normal, caution, or warning depending on the magnitude of the determined leakage current.

[0058] In addition, the processor (150) can assign time values ​​to information regarding harmonics, power imbalance / reverse phase, leakage current, and busbar temperature, etc., analyzed as described above, and store it as time series data or time series log, and can upload the stored time series data or time series log to a server or provide it to a user terminal device.

[0059] Here, the processor (150) can assign time values ​​to information regarding harmonics, power imbalance / reverse phase, leakage current, and busbar temperature analyzed in conjunction with the RTC (Real-Time Clock), thereby enabling the generation and storage of time series data. Additionally, the time of generation of a Trip signal for circuit interruption and the time of alarm occurrence through the alarm unit (140) can be identified and time values ​​assigned through the RTC.

[0060] Accordingly, the processor (150) can maintain the order and time of event occurrences without distortion through the RTC when performing system recovery after a power outage, thereby increasing the accuracy of the recovery.

[0061] Meanwhile, the processor (150) can control the LED and the buzzer differently based on the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature. Specifically, if the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature are within a first preset range, the green LED is continuously lit; if they are within a second preset range, the blue LED is continuously lit and the buzzer is sounded at a first preset period; and if they are within a third preset range, the red LED is flashed and the buzzer is sounded at a second preset period.

[0062] Additionally, the processor (150) can blink a yellow LED when the external power is cut off, light up the green and yellow LEDs simultaneously when the external power is restored, and transmit stored time-series data to the server through the voltage stored in the power storage unit during the period of external power cut-off.

[0063] FIG. 4 is a diagram illustrating an example of control conditions for controlling an LED and a buzzer according to an embodiment of the present invention.

[0064] Referring to FIG. 4, the processor (150) detects when all measured values ​​are within the normal range, that is, when the harmonic THD is less than 10% and the temperature of the busbar is 72 If the power imbalance rate is less than 10%, it is determined to be in a green state, the green LED is continuously lit, and no separate buzzer sound is output, and time-series data regarding power parameters can be continuously stored.

[0065] In addition, the processor (150) 1) the temperature of the busbar is 72 More than 100 If at least one of the following applies: 1) when the harmonic THD is less than 10%, 2) when the harmonic THD is 10% or more but less than 15%, 3) when the current imbalance rate is 10% or more but less than 15%, 4) when the power factor is 0.8 or more but less than 0.9, or 5) when the leakage current is close to a boundary value, the system determines that the system is in a state of caution, continuously lights up a blue LED, repeatedly sounds a buzzer at 1-second intervals, transmits a warning message to a user terminal device via Bluetooth communication, and uploads time-series data stored on a server.

[0066] In addition, the processor (150) 1) the busbar temperature is 100 If at least one of the following applies: 1) when the abnormality is present, 2) when the harmonic THD is 15% or higher, 3) when the current imbalance rate is 15% or higher, 4) when a reverse phase is detected, or 5) when the leakage current exceeds a threshold value, the system can determine a warning state, flash a red LED, and repeatedly sound a buzzer at 0.5-second intervals, generate and output a Trip signal for circuit interruption, and store and transmit time-series data while the circuit is interrupted to a server or user terminal device.

[0067] Meanwhile, the processor (150) can stop generating harvesting power when the external power is cut off, that is, when the power is in standby mode, and switch to battery mode operation using the voltage stored in the power storage unit, at which time the yellow LED can be blinked, and when the external power is restored, the green LED and yellow LED can be lit simultaneously and the buzzer can be sounded three times for 0.2 seconds each, and during the period of the external power cut-off, time series data stored using the voltage stored in the power storage unit can be uploaded to the server.

[0068] Of course, the control conditions for controlling the LED and buzzer described above are not limited to those shown in FIG. 4 and may change depending on the power state and situation.

[0069] Meanwhile, the processor (150) counts the number of judgments for generating a Trip signal for circuit interruption if the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature are within a second preset range, and if the number of judgments is greater than or equal to the preset number or if the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature are within a third preset range, it can generate and immediately output a Trip signal for circuit interruption, and can store information regarding the time and cause of generating the Trip signal for circuit interruption as time series data.

[0070] Here, the circuit breaker trip signal is also called an MCCB (Molded Case Circuit Breaker) trip signal and is a type of circuit breaker widely used in industrial sites and distribution panels, and can perform the function of automatically interrupting the circuit when abnormal conditions such as overcurrent, short circuit, ground fault, or overload occur.

[0071] Specifically, a circuit breaker trip signal refers to a signal that induces the operation of a circuit breaker by applying an electrical signal (usually 12V DC or 24V DC) to a trip coil provided inside or outside the MCCB.

[0072] Accordingly, the processor (150) 1) the busbar temperature is 100 If at least one of the following applies: 1) when the harmonic THD is 15% or more, 2) when the current imbalance rate is 15% or more, 4) when a reverse phase is detected, or 5) when the leakage current exceeds a threshold value, the system determines the state to be in a warning condition and, instead of immediately generating and outputting a Trip signal for circuit interruption, counts the number of warning accumulation judgments for generating a Trip signal for circuit interruption, and, for example, when the number of warning accumulation judgments reaches 3, a Trip signal for circuit interruption can be generated and output.

[0073] In addition, the processor (150) 1) the busbar temperature is 100 If at least one of the following applies: 1) when the abnormality is detected, 2) when the harmonic THD is 15% or more, 3) when the current imbalance rate is 15% or more, 4) when a reverse phase is detected, or 5) when the leakage current exceeds a threshold value, the circuit can be automatically disconnected by determining a warning state and immediately generating and outputting a Trip signal for circuit interruption.

[0074] And, when a circuit-blocking Trip signal is output, the processor (150) determines the time and cause of the generation of the circuit-blocking Trip signal, i.e., 1) the busbar temperature is 100 Information regarding which of the following applies can be stored as time series data: 1) when the abnormality is present, 2) when the harmonic THD is 15% or higher, 3) when the current imbalance rate is 15% or higher, 4) when a reverse phase is detected, or 5) when the leakage current exceeds a threshold value.

[0075] FIG. 2 is a drawing illustrating the specific configuration of an integrated CT unit according to one embodiment of the present invention.

[0076] Referring to FIG. 2, the integrated CT unit (110) may include a cover unit (111), an induction shielding ring (112), and a main case (117). Inside the main case (117), a plurality of conduits (113a, 113b, 113c, 113d) through which a busbar passes are arranged. Around each conduit, a CT (current transformer) (114a, 114b, 114c, 114d) for detecting a four-phase alternating current flowing through the busbar may be formed and arranged in a ring shape surrounding the busbar, and an auxiliary coil (115, 116) for inducing a voltage for energy harvesting may also be formed and arranged in a ring shape surrounding the busbar.

[0077] That is, around each busbar penetrating the conduit, a ring-shaped CT (114a, 114b, 114c, 114d) and an auxiliary coil for voltage induction for energy harvesting (hereinafter, auxiliary coil for harvesting) (115, 116) may be spaced apart at predetermined intervals.

[0078] Specifically, the CT (114a) and the auxiliary coil for harvesting (115) are arranged in a ring shape around the conduit (113a) to wrap around a single identical busbar, but can be spaced apart by a predetermined interval, and a first insulating layer (21) and a second insulating layer (22) are arranged between the CT (114a) and the auxiliary coil for harvesting (115) so that they can be spaced apart by a predetermined interval.

[0079] Additionally, each of the first insulating layer (21) and the second insulating layer (22) includes a plurality of openings so that a plurality of conduits (113a, 113b, 113c, 113d) can pass through, and may include a total of four openings.

[0080] The first insulating layer (21) and the second insulating layer (22), having a total of four openings formed in this way, can be fitted into each of the plurality of conduits (113a, 113b, 113c, 113d) as shown in FIG. 2, and each of the CT (114a, 114b, 114c, 114d) and the auxiliary coil for harvesting (115, 116) can be arranged together.

[0081] Basically, each CT (114a, 114b, 114c, 114d) and auxiliary coils for harvesting (115, 116) can be arranged on the same layer without overlapping each other, and specifically, at the bottom of the first insulating layer (21), that is, the bottom of the main case (117), some of the CTs, namely two CTs (114a, 114c), can be formed in a ring shape and arranged by being fitted into some of the multiple conduits (113a, 113c).

[0082] Additionally, the two CTs (114a, 114c) are not placed consecutively in the first conduit (113a) and the second conduit (113b) so as not to overlap each other, but can be placed in the first conduit (113a), then skip the second conduit section (113b), and then placed in the third conduit section (113c).

[0083] And, the remaining parts of the CTs (114a, 114b, 114c, 114d), namely CTs (114b, 114d), may be placed on the upper part of the first insulating layer (21), and likewise, CTs (114b, 114d) may be formed in a ring shape and placed by being fitted into the second conduit (113b) and the fourth conduit (113d).

[0084] Through this, CTs (114a, 114b, 114c, 114d) can be placed in each of the multiple conduits (113a, 113b, 113c, 113d).

[0085] Additionally, a second insulating layer (22) may be disposed on the upper part of the CT (114b, 114d), and an auxiliary coil (115, 116) for harvesting may be disposed on the upper part of the second insulating layer (22).

[0086] Specifically, each of the auxiliary coils (115, 116) for harvesting may be placed in the first conduit (113a) and the third conduit (113c), may be placed in the second conduit (113b) and the fourth conduit (113d), and may be placed in the first conduit (113a) and the fourth conduit section (113d).

[0087] That is, the auxiliary coils for harvesting (115, 116) can be placed in conduit sections that are spaced apart from each other, excluding conduit sections adjacent to each other on the same layer, because if the auxiliary coils for harvesting (115, 116) are placed in conduits adjacent to each other, they may overlap or overlap each other.

[0088] As described above, through the arrangement of the first insulating layer (21) and the second insulating layer (22), the CT (114a, 114b, 114c, 114d) and the auxiliary coils for harvesting (115, 116) can all be arranged in a position where they do not overlap with each other, and the distance between the first insulating layer (21) and the second insulating layer (22) can be the predetermined distance between the CT (114a, 114c) and the auxiliary coils for harvesting (115, 116).

[0089] In addition, as shown in FIG. 2, at least two of the plurality of conduits (113a, 113b, 113c, 113d) may each be in a form in which both CT (114a, 114c) and auxiliary coils for harvesting (115, 116) are fitted.

[0090] Additionally, in FIG. 2, the shielding ring (112) is shown as a separate configuration rather than in a shape that encloses the CT (114a, 114b, 114c, 114d) and the auxiliary coils for harvesting (115, 116), but this is shown as a separate configuration for explanatory purposes only, and the shielding ring (112) can be placed inside the main case (117) in a form that completely encloses the CT (114a, 114b, 114c, 114d) and the auxiliary coils for harvesting (115, 116) placed inside the main case (117).

[0091] As shown in Fig. 2, the auxiliary coils of the CT (current transformer) and TR (transformer) are arranged together in a ring shape that surrounds the busbar, thereby forming an integrated CT section (110), which ensures ease of installation and cost-effectiveness.

[0092] Additionally, the main surface of the opening of the cover portion (111) may further include a temperature sensor for measuring the busbar temperature or the pipe temperature, or an environment sensor for detecting humidity or gas.

[0093] That is, the integrated CT unit (110) can detect temperature, humidity, or gas through a temperature sensor, an environment sensor, etc. placed in the cover unit (111), and the processor (150) can assign a time value to the data sensed through the environment sensor and store it as time-series data.

[0094] Meanwhile, at least one side of the case (117) may have a plurality of insulating barriers connected to prevent contact or overlap between magnetic fields between a plurality of busbars penetrating the conduit (113a, 113b, 113c, 113d), and at least one side of the case (117) may have a protrusion (111a, 111b, 111c) with a plurality of recessed grooves formed therein so that the insulating barriers can be connected or fitted.

[0095] And, these insulating barriers can be placed within the area between the multiple busbars by being fitted into the grooves formed in the provided protrusions (111a, 111b, 111c).

[0096] FIG. 3 is a diagram illustrating the data processing and power provision process of each component of an energy harvesting-based power black box according to an embodiment of the present invention.

[0097] Referring to FIG. 3, the data processing of each component of the energy harvesting-based power black box and the power supply process between each component are illustrated, and in particular, the yellow arrow (210) indicates the flow of external power between each component and the green arrow (220) indicates the flow of power through harvesting.

[0098] Specifically, the integrated CT unit (110) can detect the four-phase alternating current of L1, L2, L3, and N, detect the temperature of each busbar and the pipe temperature of L1, L2, L3, and N and provide them to the processor (150), and generate an induced current based on the four-phase alternating current and provide it to the harvesting unit (120).

[0099] And, the harvesting unit (120) can convert the provided induced current into a DC voltage through an AC / DC converter (121) and convert the DC voltage into a voltage for driving the circuit through a voltage drop unit (122).

[0100] Additionally, the harvesting unit (120) can increase the voltage of the converted circuit driving voltage to 12V through the boosting unit (123) and provide it to the MCCB Trip unit (160) to generate a Trip signal for circuit blocking according to the command of the processor (150) when certain conditions are satisfied.

[0101] Additionally, the harvesting unit (120) can store a portion of the converted circuit driving voltage in the power storage unit (124).

[0102] Meanwhile, the processor (150) can analyze and determine the information regarding the four-phase alternating current and temperature provided from the integrated CT unit (110) and the line information measurement data provided from the external measuring instrument (170) to control the LED and buzzer included in the alarm unit (140) differently.

[0103] In particular, the harvesting unit (120) provides the converted circuit driving voltage to the processor (150) and the alarm unit (140) when an external power cutoff or power outage occurs (see green arrow (220)), thereby preventing the analysis and judgment operation of the processor (150) and the display operation of the alarm unit (140) resulting therefrom from being interrupted.

[0104] Additionally, the communication unit (130) can communicate with a user terminal device via Bluetooth communication and can communicate with a server via Ethernet communication.

[0105] The operation of each of the above-described components can be applied equally to each component illustrated in FIG. 3, so a detailed description will be omitted.

[0106] FIG. 5 is a flowchart illustrating a control method for an energy harvesting-based power black box according to an embodiment of the present invention.

[0107] Referring to FIG. 5, a control method for an energy harvesting-based power black box according to one embodiment of the present invention may include the steps of: detecting an alternating current and temperature flowing through a busbar (S110); generating an induced current based on the alternating current (S120); converting the generated induced current into a DC voltage and converting or storing the DC voltage into a voltage for driving a circuit (S130); analyzing harmonics, power imbalance / reverse phase and leakage current based on the alternating current (S140); and controlling an LED and a buzzer differently based on the analyzed harmonics, power imbalance / reverse phase, leakage current and the detected temperature (S150).

[0108] In addition, the operation process of the aforementioned integrated CT unit (110), harvesting unit (120), communication unit (130), alarm unit (140), and processor (150) can be applied in the same way to the control method of the energy harvesting-based power black box.

[0109] FIG. 6 is a block diagram illustrating the specific configuration of the energy harvesting-based power black box shown in FIG. 1.

[0110] Referring to FIG. 6, the energy harvesting-based power black box (100) may include an integrated CT unit (110), a harvesting unit (120), a communication unit (130), an alarm unit (140), and a processor (150).

[0111] The processor (150) controls the overall operation of the energy harvesting-based power black box (100).

[0112] Specifically, the processor (150) includes RAM (151), ROM (152), main CPU (153), graphics processing unit (154), first to n interfaces (155-1 to 155-n), and a bus (156).

[0113] RAM (151), ROM (152), main CPU (153), graphics processing unit (154), first to n interfaces (155-1 to 155-n), etc. can be connected to each other via a bus (156).

[0114] The first to n interfaces (155-1 to 155-n) are connected to the various components described above. One of the interfaces may be a network interface connected to an external device through a network.

[0115] The main CPU (153) accesses the storage unit (180) and performs booting using the O / S stored in the storage unit (180). Then, it performs various operations using various programs, content, data, etc. stored in the storage unit (180).

[0116] In particular, the main CPU (153) can analyze harmonics, power imbalance / reverse phase and leakage current based on alternating current, and control LEDs and buzzers differently based on the analyzed harmonics, power imbalance / reverse phase, leakage current and detected temperature.

[0117] A set of instructions for booting the system is stored in the ROM (152). When a turn-on command is input and power is supplied, the main CPU (153) copies the O / S stored in the storage unit (180) to the RAM (151) according to the instructions stored in the ROM (152), and executes the O / S to boot the system. When booting is complete, the main CPU (153) copies various application programs stored in the storage unit (180) to the RAM (151), and executes the application programs copied to the RAM (151) to perform various operations.

[0118] The graphics processing unit (154) generates a screen containing various objects such as icons, images, and text using a calculation unit (not shown) and a rendering unit (not shown). The calculation unit (not shown) calculates attribute values ​​such as coordinate values, shape, size, and color for each object to be displayed according to the layout of the screen based on a received control command. The rendering unit (not shown) generates a screen of various layouts containing objects based on the attribute values ​​calculated by the calculation unit (not shown).

[0119] In particular, the graphics processing unit (154) can implement objects generated by the main CPU (153) into a GUI (Graphic User Interface), icon, user interface screen, etc.

[0120] Meanwhile, the operation of the above-described processor (150) can be performed by a program stored in the storage unit (180).

[0121] The storage unit (180) stores various data, such as an O / S (Operating System) software module for operating the energy harvesting-based power black box (100) and various multimedia content.

[0122] In particular, the storage unit (180) may include a software module for analyzing harmonics, power imbalance / reverse phase and leakage current based on alternating current, and for controlling LEDs and buzzers differently based on the analyzed harmonics, power imbalance / reverse phase, leakage current and the detected temperature.

[0123] FIG. 7 is a drawing relating to a software module stored in a storage unit according to an embodiment of the present invention.

[0124] Referring to FIG. 7, the storage unit (180) may store programs such as a harvesting module (181), a power parameter analysis module (182), an alarm unit control module (183), a power outage control module (184), and a trip signal generation module (185) for circuit interruption.

[0125] The harvesting module (181) can convert the generated induced current into a DC voltage and convert or store the DC voltage into a voltage for driving the circuit.

[0126] Additionally, the power parameter analysis module (182) can analyze harmonics, power imbalance / reverse phase and leakage current based on alternating current.

[0127] Additionally, the alarm control module (183) can control the LED and buzzer differently based on the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature. Specifically, if the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature are within a first preset range, the green LED is continuously lit; if they are within a second preset range, the blue LED is continuously lit and the buzzer is sounded at a first preset period; and if they are within a third preset range, the red LED is flashed and the buzzer is sounded at a second preset period.

[0128] Additionally, the power outage control module (184) can flash a yellow LED when the external power is cut off, light up the green and yellow LEDs simultaneously when the external power is restored, and transmit stored time-series data to the server through the voltage stored in the power storage unit during the period of the external power cut-off.

[0129] Additionally, the circuit interruption trip signal generation module (185) counts the number of judgments for generating a circuit interruption trip signal if the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature are within a second preset range, and if the number of judgments is greater than or equal to the preset number or if the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature are within a third preset range, it generates and immediately outputs a circuit interruption trip signal and can store information regarding the time and cause of the circuit interruption trip signal generation as time series data.

[0130] Meanwhile, a non-transitory computer-readable medium storing a program that sequentially performs the control method according to the present invention may be provided.

[0131] A non-transient readable medium refers to a medium that stores data semi-permanently and can be read by a device, rather than a medium that stores data for a short period of time, such as a register, cache, or memory. Specifically, the various applications or programs described above may be stored and provided on non-transient readable media such as CDs, DVDs, hard disks, Blu-ray discs, USBs, memory cards, and ROMs.

[0132] In addition, although the bus is not shown in the aforementioned block diagram illustrating the energy harvesting-based power black box, it may further include a processor such as a CPU or microprocessor that analyzes harmonics, power imbalance / reverse phase, and leakage current based on alternating current, and controls LEDs and buzzers differently based on the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature.

[0133] Furthermore, although preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above. It is understood that various modifications can be made by those skilled in the art without departing from the essence of the invention as claimed in the claims, and such modifications should not be understood individually from the technical spirit or perspective of the present invention. Explanation of the symbols

[0134] 100: Energy Harvesting-Based Power Black Box 110: Integrated CT Division 120: Harvesting Division 130: Communications Unit 140: Alarm Unit 150: Processor 180: Storage

Claims

Claim 1 In an energy harvesting-based power black box, the system comprises: an integrated CT unit that detects alternating current and temperature flowing through a busbar and generates an induced current based on the alternating current; a harvesting unit that converts the generated induced current into a DC voltage and converts or stores the DC voltage into a voltage for circuit driving; a communication unit that communicates with a server; an alarm unit including an LED and a buzzer; and a processor that analyzes harmonics, power imbalance / reverse phase, and leakage current based on the alternating current, controls the LED and buzzer differently based on the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature, and predicts power quality and measurement diagnostic results of a wiring board, distribution board, and motor control board by analyzing accumulated time-series data regarding the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature.The integrated CT unit includes a CT (current transformer) arranged in a ring shape surrounding a busbar and an auxiliary coil for harvesting arranged together with the CT, wherein the CT and the auxiliary coil for harvesting are wrapped by a shielding ring, and the CT and the auxiliary coil for harvesting are spaced apart by a preset interval, with an insulating layer disposed between them, and the processor assigns time values ​​to the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature to store them as time series data, and provides the stored time series data to the server for use in power quality analysis, and if the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature are within a first preset range, a green LED is continuously illuminated, if they are within a second preset range, a blue LED is continuously illuminated and the buzzer is sounded at a first preset period, and if they are within a third preset range, a red LED is flashed and the buzzer is sounded at a second preset period, and the analyzed An energy harvesting-based power black box characterized by counting the number of judgments for generating a trip signal for circuit interruption if harmonics, power imbalance / reverse phase, leakage current, and detected temperature are within the second preset range, generating and immediately outputting the trip signal for circuit interruption if the number of judgments is greater than or equal to the preset number, or if the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature are within the third preset range, and storing information regarding the time and cause of generating the trip signal for circuit interruption as time-series data. Claim 2 An energy harvesting-based power black box according to claim 1, wherein the integrated CT unit is formed as an integrated structure including a transformer (TR), detects a magnetic field generated by an alternating current flowing through the busbar through the core of the transformer, and generates the induced current through an induced voltage induced in an auxiliary coil within the transformer. Claim 3 In paragraph 2, the energy harvesting-based power black box further comprises a power storage unit and supplies the voltage stored in the power storage unit to the processor when the external power is cut off. Claim 4 delete Claim 5 delete Claim 6 An energy harvesting-based power black box according to claim 1, wherein the processor blinks a yellow LED when the external power is cut off, simultaneously lights a green and yellow LED when the external power is restored, and transmits stored time-series data to the server through the voltage stored in the power storage unit during the period of the external power cut off. Claim 7 delete Claim 8 An energy harvesting-based power black box according to claim 1, wherein the integrated CT unit further includes an environment sensor that detects humidity or gas, and the processor stores the data sensed through the environment sensor as time-series data. Claim 9 A control method for an energy harvesting-based power black box comprises: a step of detecting an alternating current flowing through a busbar and a temperature; a step of generating an induced current based on the alternating current; a step of converting the generated induced current into a DC voltage and converting or storing the DC voltage into a voltage for driving a circuit; a step of analyzing harmonics, power imbalance / reverse phase, and leakage current based on the alternating current; and a step of controlling an LED and a buzzer differently based on the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature.The step of generating an induced current based on the alternating current includes utilizing an integrated CT unit comprising a CT (current transformer) arranged in a ring shape surrounding a busbar and an auxiliary coil for harvesting arranged together with the CT, wherein the CT and the auxiliary coil for harvesting are wrapped by a shielding ring, and the CT and the auxiliary coil for harvesting are spaced apart by a preset interval, with an insulating layer disposed between them, and the step of analyzing harmonics, power imbalance / reverse phase, and leakage current based on the alternating current includes assigning time values ​​to the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature to store them as time-series data, providing the stored time-series data to a server for use in power quality analysis, and if the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature are within a first preset range, a green LED is continuously illuminated, and if they are within a second preset range, a blue LED is continuously illuminated and the buzzer is sounded at a first preset period, and a third A control method for an energy harvesting-based power black box, characterized by: flashing a red LED and sounding the buzzer at a second preset period if the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature are within the second preset range; counting the number of judgments for generating a trip signal for circuit interruption if the number of judgments is greater than or equal to a preset number, or if the analyzed harmonics, power imbalance / reverse phase, leakage current, and detected temperature are within the third preset range, generating and immediately outputting the trip signal for circuit interruption, and storing information regarding the time and cause of the trip signal generation as time-series data.

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