Power supply system capable of handling leakage current and method thereof

Abstract

The present invention relates to a power supply system capable of handling a leakage current and a method thereof. The power supply system comprises a power supply unit for supplying power to a load, the power supply unit including: a power input unit for receiving power from the outside; a power output unit for supplying power to the load; a communication unit for communicating with an external device; a detection unit for detecting a leakage current generated during the course of supplying power; a leakage current handling unit for adaptively adjusting the magnitude of an input impedance to handle the leakage current so that the leakage current flows within an allowable range; and a control unit for blocking the leakage current from exceeding the allowable range in the leakage current handling unit by using detection information on the leakage current provided from the detection unit, and transmitting information on leakage current generation and leakage current handling to a server.

Description

Power supply system capable of handling leakage current and method thereof

[0001] The present invention relates to a power supply system capable of handling leakage current, and to a power supply system capable of preventing accidents caused by electric shock, etc., by handling leakage current that may occur during power supply.

[0002]

[0003] Electricity is essential not only for daily life but also for industrial development, providing various benefits to our lives. However, this electricity often leads to accidents. For example, when electrical devices are submerged in water, such as during a flood, or when wires are stripped of their insulation, current leakage can occur. If a person comes into contact with the device or wire, the leaked current flows through the body to the ground. If the current exceeds a certain threshold, it can cause an electric shock and result in death. Generally, a current of 1 mA is mildly noticeable, 5 mA causes convulsions, 10 mA causes discomfort, 15 mA or more causes severe convulsions, and 50-100 mA or more can result in death. Furthermore, if a leakage current exceeding the specified threshold comes into contact with a flammable object, it can cause a fire. Therefore, even if leakage current occurs due to a natural disaster or a problem with a power line, a method is needed to limit the leakage current flowing to the outside, such as the human body, to less than 1 mA to prevent accidents.

[0004]

[0005] The present invention relates to a power supply system capable of controlling leakage current occurring during power supply.

[0006] In addition, the present invention relates to a power supply system that allows a user to conveniently manage a power supply situation.

[0007]

[0008] The present invention relates to a power supply system including a power supply unit for supplying power to a load, wherein the power supply unit includes a power input unit for receiving power from an external source; a power output unit for supplying power to the load; a communication unit for communicating with an external device; a detection unit for detecting leakage current generated during a power supply process; a leakage current processing unit for adaptively adjusting the size of an input impedance to process the leakage current so that it flows within an allowed range; and a control unit for blocking leakage current exceeding the allowed range in the leakage current processing unit using detection information regarding leakage current provided from the detection unit and transmitting information regarding leakage current generation and leakage current processing to a server.

[0009] Here, the detection unit can detect leakage current in the ground line, and the leakage current processing unit can adjust the size of the input impedance in response to the size of the leakage current.

[0010] In addition, the power supply system of the present invention further includes an IP speaker unit that receives and outputs audio data transmitted from the outside through either an IP network or a wireless communication unit, and the control unit transmits information about the leakage current to the IP speaker unit when either the frequency of occurrence of the leakage current exceeds a first threshold value or the leakage current exceeding a predetermined value exceeds a second threshold value, and the IP speaker unit can output information notifying the risk of leakage current to the outside using the received information about the leakage current.

[0011] In addition, the control unit transmits information about power supply including at least one of a power input situation, a power output situation, a leakage current occurrence situation, and a leakage current processing situation to the server, and the server can process the received information about the power supply situation and provide it to the user.

[0012] Additionally, the server may analyze information on leakage current provided from the power supply unit using either deep learning or machine learning technology using an artificial neural network, and provide the administrator with information on the risk of leakage current indicating the level of risk of leakage current.

[0013] In addition, the server may transmit a message regarding prevention of accidents caused by leakage current to the IP speaker unit and output it externally when the frequency of occurrence of leakage current exceeding a predetermined value is greater than a threshold value.

[0014] Meanwhile, the present invention relates to a power supply method including a process of supplying power to a load; a process of detecting a leakage current in a detection unit and providing detection information about the leakage current to a control unit; a process of adjusting the size of an input impedance in a leakage current processing unit using the detection information about the leakage current so that the leakage current flows within an allowable range; and a process of transmitting information about the generation of leakage current and leakage current processing to a server.

[0015] Here, the power supply method of the present invention may further include a process of transmitting information about the leakage current to an IP speaker unit that outputs audio data transmitted from the outside when either the frequency of occurrence of the leakage current is greater than or equal to a first threshold value or the leakage current exceeding a predetermined value is greater than or equal to a second threshold value.

[0016]

[0017] The present invention can rapidly detect the occurrence of leakage current and determine the allowable leakage current range, thereby preventing accidents caused by leakage current. Furthermore, it can predict the occurrence of accidents caused by leakage current in advance and notify managers, enabling them to take preventive measures. Furthermore, information regarding power input and output status, leakage current occurrence, etc. can be provided to managers via wired or wireless communication, allowing managers to conveniently monitor power supply status using personal portable electronic devices such as smartphones.

[0018]

[0019] Figure 1 is a drawing showing the main configuration of a power supply system according to one embodiment of the present invention.

[0020] Figure 2 is a drawing showing the main configuration of a power supply unit of a power supply system according to one embodiment of the present invention.

[0021] FIG. 3 is a drawing for explaining the flow of current supplied from a power supply unit of a power supply system according to one embodiment of the present invention from the perspective of power supply.

[0022] FIG. 4 is a drawing for explaining the flow of current supplied from a power supply unit of a power supply system according to one embodiment of the present invention from the load side.

[0023] Figure 5 is a flowchart for explaining the operation of a power supply unit of a power supply system according to one embodiment of the present invention.

[0024]

[0025] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In describing the present invention, detailed descriptions of known functions or configurations will be omitted if they are deemed to unnecessarily obscure the gist of the invention.

[0026]

[0027] Figure 1 is a drawing showing the main configuration of a power supply system (10) according to one embodiment of the present invention.

[0028] Referring to FIG. 1, the power supply system (10) of the present invention includes a power supply unit (100), an IP speaker unit (110), and a server (120).

[0029] The power supply unit (100) receives power supplied from the outside and outputs it to supply it to a load. For example, the power supply unit (100) can supply power to an IP speaker unit (110). In addition, the power supply unit (100) can detect a leakage current that occurs when supplying power and prevent a leakage current exceeding a predetermined value from occurring, thereby controlling the leakage current to flow below a predetermined value. At this time, the allowable leakage current size can be determined in advance. In addition, the power supply unit (100) can transmit information about power supply, such as power input and power output situations, leakage current occurrence and leakage current processing situations, to the server (120), and transmit information about the leakage current to the IP speaker unit (110).

[0030] The IP speaker unit (110) is for receiving audio data provided from the outside through an IP network or receiving it through a wireless communication unit and outputting it. The IP speaker unit (110) is equipped with a PoE (Power of Ethernet) charging system that is connected to a USB cable and charged with a rated voltage and current, a PoE Ethernet module, and a wireless communication unit capable of communication such as Wi-Fi, Bluetooth, LTE (Long Term Evoloution), and 5G (5th Generation). In addition, the IP speaker unit (110) includes a plurality of speakers and a speaker selector (Spaeker Selector) that can selectively drive each speaker, and an IP address can be assigned.

[0031] The IP speaker unit (110) is connected to a PoE charging system and may include a DC-DC converter that converts DC voltage into a predetermined DC voltage, an audio ADC that converts an analog audio signal to A / D and provides a digital audio signal, a CPU that provides each function of charging the IP speaker and outputting an audio signal, a DSP that is connected to the CPU and has a DSP program installed, a power on / off button connected to the DSP, a volume control unit that adjusts a volume level, an equalizer control unit that adjusts an equalizer level for each frequency band, an audio DAC that D / A converts a digital audio signal and provides an analog audio signal, and an amplifier (Amp) that amplifies the analog audio signal according to the adjusted volume level and the equalizer level for each frequency band. In addition, the IP speaker unit (110) may receive digital sound source data through an IP network to a PoE Ethernet module and output it through the CPU, audio DAC-amplifier-speaker according to a preset volume level and an equalizer level for each frequency band.

[0032] Meanwhile, the IP speaker unit (110) can externally notify information about leakage current provided from the power supply unit (100) or a notice provided from the server (120). For example, when the frequency of occurrence of leakage current exceeds a threshold value or a leakage current exceeding a predetermined value exceeds a threshold value, the power supply unit (100) can transmit information about leakage current to the IP speaker unit (110), and the IP speaker unit (110) can externally output information notifying of the risk of leakage current, such as the occurrence of leakage current and the risk of a leakage accident caused by it. In addition, when the risk of an accident due to leakage current is high, the IP speaker unit (110) can receive a notice about prevention of accidents due to leakage current from the server (120) and output it externally to guide people to prepare for danger.

[0033] The server (120) processes information regarding the power supply status provided from the power supply unit (100) and provides it to the administrator. At this time, the information regarding the power supply status includes information regarding input power, output power, and leakage current from the power supply unit (100). The administrator can conveniently monitor the power supply status using a smartphone, pad, PC, etc. using the information regarding the power supply status provided from the server (120).

[0034] In addition, the server (120) can analyze information on leakage current provided from the power supply unit (100) using deep learning or machine learning technology using artificial neural networks such as a self-organizing map (SOM), a recurrent neural network (RNN), a convolutional neural network (CNN), and a deep neural network (DNN). Using this, the server (120) can provide the administrator with information on the risk of leakage current indicating the degree of risk of leakage current for predicting the occurrence of an accident due to leakage current, information on the presence or absence of abnormalities in components including wires for searching for and eliminating the cause of leakage current, information on the necessity of replacing components, etc.

[0035] When the risk of leakage current is high, the server (120) can transmit a notice regarding the prevention of accidents caused by leakage current to the IP speaker unit (110) and output it to the outside. For example, when the frequency of occurrence of leakage current exceeding a predetermined value is above a threshold value, the server (120) can determine that the risk of leakage current is high. The IP speaker unit (110) receives information on the risk caused by leakage current from the power supply unit (100) or the server (120), and the power supply unit (100) and the server (120) can configure different criteria for judging the risk situation. For example, if the threshold value used in the power supply unit (100) is configured to be higher than the threshold value used in the server (120), and if the frequency of occurrence of leakage current is too high or the occurrence of leakage current exceeding a predetermined value is too high, it is determined that a very dangerous situation has occurred, and the power supply unit (100) can provide information on the risk due to leakage current to the IP speaker unit (110).

[0036] The server (120) can store and learn various data, such as data on the occurrence of accidents due to leakage current, data on the cause of leakage current, data on the relationship between leakage current and electrical components such as wires, data on the relationship between leakage current and aging of electrical equipment, wires, etc., and data on the relationship between leakage current and weather such as precipitation, snowfall, temperature, and humidity. In addition, the server (120) can update the learning data using data input from an administrator or data received from an external database using the Internet, etc. In addition, the server (120) can specifically identify the occurrence of leakage current and the relationship between each component by using sensing information transmitted from various sensors equipped in each component of the power supply system, and can guide the administrator on the necessity of replacement of each component, etc.

[0037] In addition, the server (120) can process the power supply system (10) so that the administrator can view it in virtual reality or augmented reality, and display the power supply status and the locations of wires or components that cause leakage current on the power supply system (10) in virtual reality or augmented reality so that the administrator can three-dimensionally understand and manage the power supply status. For this purpose, the power supply system (10) of the present invention can be equipped with three-dimensional glasses (not shown) such as an HMD (head mounted display).

[0038]

[0039] FIG. 2 is a drawing showing the main configuration of a power supply unit (100) of a power supply system (10) according to one embodiment of the present invention.

[0040] The power supply unit (100) of the present invention can be applied to various devices that supply power, such as distribution panels and branch panels.

[0041] Referring to FIG. 1, the power supply unit (100) of the present invention includes a power input unit (200), a power output unit (210), a detection unit (220), a communication unit (230), a leakage current processing unit (240), and a control unit (250).

[0042] The power input unit (200) receives power from the outside, and the input power is supplied to the load through the power output unit (210). The power supply unit (100) of the present invention can receive and output power in a single-phase (220 VAC), three-phase, three-wire (220 VAC), or three-phase, four-wire (380 VAC) manner.

[0043] The detection unit (220) detects leakage current generated during the power supply process. For example, the detection unit (220) detects leakage current in the ground line and transmits detection information regarding the leakage current to the control unit (250). The detection unit (220) can detect the occurrence of leakage current in real time and determine the average value of the leakage current generated over a predetermined period of time as the leakage current value included in the detection data. For example, the leakage current value can be determined at 1-second intervals. The leakage current in the ground line is detected by using the difference between the inflow current amount (i1) and the outflow current amount (i2). Normally, i1-i2=0, but when leakage current occurs, it is detected as leakage current (ig)=i1-i2. At this time, most of the leakage current flows to the ground, so detecting the leakage current in the ground line can identify the location of the leakage current occurrence and the exact leakage amount, and is also useful for maintenance for failures.

[0044] The communication unit (230) is for communicating with external devices such as a server (120), and may include all or part of a wireless Internet unit, a mobile communication unit, a short-range communication unit, and a wired communication unit. The wireless Internet unit accesses the wireless Internet to acquire or transmit data, and the wireless Internet that can be accessed through the wireless Internet unit may be WLAN (Wireless LAN), Wibro (Wireless broadband), Wimax (World interoperability for microwave access), HSDPA (High Speed ​​Downlink Packet Access), etc. The mobile communication unit may access and communicate with a mobile communication network according to various mobile communication standards such as LTE, 5G, and 5GPP (5th Generation Partnership Project). The short-range communication unit is for short-range communication, and may communicate via Bluetooth, RFID (Radio Frequency Idntification), IrDA (Infrared Data Association), UWB (Ultra WidBand), ZigBee, NFC (Near Field Communication), Wi-Fi, etc. The wired communication unit is an interface device that can be connected to other devices via wires. The communication unit (120) can communicate based on TCP / IP.

[0045] The leakage current processing unit (240) is for controlling the leakage current generated when power is supplied, and the leakage current processing unit (240) can control the leakage current to flow below a predetermined value by adjusting the size of the input impedance of the leakage current processing unit (240). For example, the leakage current processing unit (240) can control the size of the leakage current flowing in the leakage current processing unit (240) by increasing the size of the input impedance as the generated leakage current increases, and by decreasing the size of the input impedance as the size of the leakage current decreases. In addition, the leakage current processing unit (240) can also block the flow of a leakage current exceeding a predetermined value by configuring the size of the input impedance to be fixed.

[0046] The control unit (250) controls the power supply unit (100) of the present invention as a whole, such as by processing the leakage current in the leakage current processing unit (240) when the detection unit (220) detects leakage current to prevent leakage current exceeding a predetermined value from flowing, and transmitting information on power supply, such as power input and power output situations, leakage current generation and leakage current processing situations, to the server (120). In addition, the control unit (250) can transmit information on leakage current to the IP speaker unit (110) when the frequency of leakage current generation exceeds a threshold value or a leakage current exceeding a predetermined value occurs exceeding a threshold value. At this time, the threshold value can be configured to be the same or different depending on the situation.

[0047]

[0048] FIG. 3 is a drawing for explaining the flow of current supplied from a power supply unit (100) of a power supply system (10) according to one embodiment of the present invention from the perspective of power supply.

[0049] Hereinafter, a method for controlling leakage current when a leakage current occurs due to a ground fault, leakage, etc. in one of the lines in a situation where the current supplied from the L phase (300) flows to the N phase (310) and current flows between the L line and the N line is described. This leakage current control method can be applied identically or similarly to a three-phase, three-wire system or a three-phase, four-wire system.

[0050] In a normal state (A) where no leakage current occurs, the current supplied from the L phase (300) and the current flowing to the N phase (310) are the same, so that all current supplied from the L phase (300) flows to the N phase (310). However, in the case where leakage occurs due to a ground fault or the like (B), there is a difference between the current supplied from the L phase (300) and the current flowing to the N phase (310), so that only the current excluding the leakage current among the current supplied from the L phase (300) flows to the N phase (310), the leakage current flows to the ground (320), and the current flowing to the ground (320) flows to the N phase (310) through the leakage current processing unit (240). At this time, the leakage current processing unit (240) can adjust the size of the input impedance to correspond to the size of the leakage current so that only a leakage current below a predetermined value flows. For example, the resistance component of the input impedance can be configured as a variable resistor, and the size of the variable resistor can be configured to correspond to the size of the leakage current, so that the larger the size of the resulting leakage current, the larger the size of the variable resistor can be configured.

[0051] For example, when power is supplied at 220V and a 1Ω ground fault occurs, the current can flow up to 220A. In this case, if the current is large and the leakage current is to be allowed to be within the range of 0.1mA to 1mA, the resistive component of the input impedance becomes 2,200kΩ when the leakage current is 0.1mA, and the resistive component of the input impedance becomes 220kΩ when it is 1mA, so the resistive component of the input impedance can be determined within the range of 2,200kΩ to 220kΩ in response to the size of the allowable leakage current.

[0052]

[0053] FIG. 4 is a drawing for explaining the flow of current supplied from the power supply unit (100) of the power supply system (10) according to one embodiment of the present invention from the load side.

[0054] In a normal state (A) where no leakage current occurs, the current supplied from the L phase (400) and the current flowing to the N phase (410) are the same, so that the current supplied from the L phase (400) flows entirely to the N phase (410) through the load (420). However, in the event of a leakage current such as a ground fault, a difference occurs between the current supplied from the L phase (400) and the current flowing to the N phase (410), so that only the current excluding the leakage current among the current supplied from the L phase (400) flows to the N phase (410), and the leakage current flows to the ground (430) such as the load ground, and the current flowing to the ground (430) flows to the N phase (410) through the leakage current processing unit (240). At this time, the leakage current processing unit (240) can adjust the size of the input impedance to correspond to the size of the leakage current generated, thereby adjusting the size of the input impedance so that only a leakage current below a predetermined value can flow.

[0055]

[0056] FIG. 5 is a drawing for explaining the operation of a power supply unit (100) of a power supply system (10) according to one embodiment of the present invention.

[0057] The power input into the power input unit (200) is output through the power output unit (210) and supplied to the load (500). If a leakage current occurs due to a ground fault or the like (example of 510), the detection unit (220) detects the leakage current and provides detection information about the leakage current to the control unit (250) (520), and the leakage current processing unit (240) adjusts the size of the input impedance so that the leakage current flows within the allowable range (530). In addition, the control unit (250) transmits information about the power supply, such as the power input and power output situations, the leakage current occurrence and the leakage current processing situations, to the server (120) (540), and if there is a risk of an accident due to the leakage current, such as when the frequency of the leakage current occurrence exceeds the threshold value or the leakage current exceeds the threshold value, the information about the leakage current is transmitted to the IP speaker unit (110) so that it can be notified externally (550).

[0058]

[0059] Meanwhile, although the detailed description of the present invention has described specific embodiments, it is obvious that various modifications are possible within the scope of the present invention.

[0060] Therefore, the scope of the present invention is not limited to the described embodiments, but should be determined not only by the scope of the claims described below, but also by equivalents of the scope of the claims.

Claims

1. In the power supply system, Includes a power supply unit that supplies power to the load, The above power supply unit includes a power input unit that receives power from an external source; A power output unit for supplying power to a load; A communication unit for communicating with an external device; A detection unit for detecting leakage current occurring during the power supply process; A leakage current processing unit that adaptively adjusts the size of the input impedance to process the leakage current so that it flows within an allowable range; A power supply system including a control unit that uses detection information regarding leakage current provided from the above detection unit to block leakage current exceeding an allowable range in the above leakage current processing unit and transmits information regarding leakage current generation and leakage current processing to a server.

2. In paragraph 1, The above detection unit is a power supply system that detects leakage current in a ground line.

3. In paragraph 1, The above leakage current processing unit is a power supply system that adjusts the size of the input impedance in response to the size of the leakage current.

4. In paragraph 1, It further includes an IP speaker section that receives and outputs audio data transmitted from the outside through either an IP network or a wireless communication section; The above control unit transmits information about the leakage current to the IP speaker unit when either the occurrence frequency of the leakage current exceeds the first threshold value or the occurrence frequency of the leakage current exceeds the second threshold value. The above IP speaker unit is a power supply system that outputs information to the outside to notify of the risk of leakage current by using information on the received leakage current.

5. In paragraph 1, The control unit transmits information about power supply including at least one of a power input situation, a power output situation, a leakage current occurrence situation, and a leakage current processing situation to the server. The above server is a power supply system that processes information on the received power supply status and provides it to the user.

6. In paragraph 1, The above server is a power supply system that analyzes information on leakage current provided from the power supply unit using either deep learning or machine learning technology using an artificial neural network and provides the administrator with information on the risk of leakage current indicating the level of risk of leakage current.

7. In paragraph 1, The above server is a power supply system that transmits a warning message regarding the prevention of accidents caused by leakage current to the IP speaker unit and outputs it externally when the frequency of occurrence of leakage current exceeding a predetermined value is greater than a threshold value.

8. In the power supply method, The process of supplying power to the load; A process of detecting leakage current in a detection unit and providing detection information about the leakage current to a control unit; A process of adjusting the size of the input impedance in the leakage current processing unit using the detection information regarding the above leakage current so that the leakage current flows within the allowable range; A power supply method comprising a process of transmitting information on leakage current generation and leakage current processing to a server.

9. In paragraph 8, A power supply method further comprising: a process of transmitting information about a leakage current to an IP speaker unit that outputs audio data transmitted from the outside when either the occurrence frequency of a leakage current exceeds a first threshold value or the occurrence frequency of a leakage current exceeding a predetermined value exceeds a second threshold value;

Images