KR100880818B1 - An apparatus for detecting a current and a voltage intergrated with probe and that fo wireless transmitter - Google Patents

Abstract

A probe integrated current/voltage detecting device and a wireless transmitter are provided to facilitate installation, maintenance, and repair by removing a connection wire between a probe and a terminal. A probe integrated current/voltage detecting device and a wireless transmitter are comprise a coil part(200), a control part(210), an analog input interlock part(220), a DC power supply part(230), an A/D converter(240), a power managing part(250), a serial communications part(260), a memory part(280), RTC(Real Time Clock, 270), a display part(290), and a wireless communications part(300). The coil part is connected to a secondary side wire of a transformer, and measures a current flowed in the wire. The control part controls operation of a current/voltage measuring probe(100). The analog input interlock part converts an output of the current/voltage measured in the coil part into a DC. The DC power supply part converts an AC signal flowed in the coil part into a DC signal. The A/D converter converts an analog signal of the current/voltage of the wire into a digital signal. The power managing part controls a charging/discharging of a battery(330) formed in one side inside the probe. The serial communications part transmits the measured current/voltage. The memory part stores setting information and driving information for measuring the current/voltage. The RTC provides visual information required in operation of the probe. The display part distinguishes states of normal, abnormal, overload, and power failure of the probe. The wireless communications part transmits a signal to a terminal(310).

Description

An apparatus for detecting a current and a voltage intergrated with probe and that fo wireless transmitter}

For the installation and maintenance of the conventional terminal, the installer directly rides on the column transformer, installs the probe on the secondary lowering line, and measures the voltage and current applied to the column transformer by using the probe. A probe attached to a transformer secondary downline measures a current of each phase of a conventional probe device formed by a structure that transmits or solves a problem, and transmits measurement data wirelessly to a terminal installed at the bottom of the transformer. Providing convenience of installation and management by eliminating the connection line and allowing the terminal to be located at the bottom of the pole, and provides a probe-integrated current voltage measurement and easy to install and maintain the transformer load monitoring system terminal for distribution. Provides a wireless transmission device.

Typically, for the installation and maintenance of the pole transformer, the installer rides the pole transformer and installs the probe on the secondary down line, and the terminal connected to the probe and the power line measures the voltage and current flowing in the voltage line at the probe and maintains it in the event of a failure. It is a fact that repairs and emergency measures are taken.

As shown in FIG. 1 attached to measure the voltage and current, a block diagram showing a configuration of a probe and a terminal of a conventional pole-type transformer load monitoring system for power distribution is shown.

The columnar transformer load monitoring system includes a transformer 103, a load monitoring terminal 104, and the load measurement probe 100.

Referring to FIG. 1, in the pole 101, a primary side wire 102 through which electric power is transmitted from a substation passes through an upper pole, and a predetermined wire branches from the primary side wire 102 so that the primary side voltage is primary. It is input to the transformer 103 through the underline 106. The primary voltage inputted to the transformer 103 is reduced in voltage by a decompression circuit in the transformer to generate a secondary voltage, and is transmitted to the customer by the secondary wire 105 through the secondary lowering line 107.

Since the decompression process is performed at a considerable high pressure, there is a large amount of change in the amount of current and a large amount of heat is generated during decompression, so that the transformer frequently suffers from the heat.

Therefore, to solve this problem, there is a need for a device for monitoring information in real time of the secondary wire 105 flowing from the transformer 103 to the customer. Accordingly, there is a need for a terminal 104 that can measure and monitor the voltage and current in the secondary side wire 105, the internal temperature of the system main body, and the external temperature, voltage and current of the columnar transformer through the probe 100. .

The voltage and current measured by the probe 100 are transmitted to the terminal 104 through the connection line 108 connected between the terminal 104 and the probe 100, and the measured voltage and The current is a system that improves the stability and quality of power by informing the power distribution operation room of the central control unit in real time of the load state such as the current and voltage of the transformer 103 installed on the pole 101 in a wireless manner.

Reference numeral 104 of FIG. 1 shows a state in which the terminal receiving the voltage and current in the secondary side wire 105, the internal temperature of the system main body, and the external temperature, voltage and current of the columnar transformer 103 is installed outside. The terminal 104 is located close to each columnar transformer 103 hanging on the pole 101, the secondary side wire 105, which is a moving passage of electricity that flows out of the respective columnar transformer 103 and flows to the customer. Measure the voltage and current flowing to the internal and external temperature in the columnar transformer 103 to make it data and wirelessly transmitted to each central control room to be measured in real time.

In the above configuration, a probe terminal for measuring voltage and current by monitoring a load of a general distribution transformer is attached to a probe 100 capable of measuring current and voltage on the secondary lowering line 107 of the columnar transformer, and measuring It is composed of a solution for acquiring load data such as current and voltage of a transformer by connecting the current and voltage signals to the terminal 104 by wire, and wirelessly transmitting the corresponding measured values to the remote place through the terminal 104.

In the above configuration, in order to install and maintain the terminal, the installer directly rides on the column transformer, and it is necessary to install a probe on A, B, C, and N on the secondary lowering line and connect it to the terminal.

However, in the case of the distribution overhead line, many wired communication lines other than the power line are hypothesized to be very complicated, and the above connection work is very difficult, and the connection line between the probe terminals is caused by the strong wind or poor connection. In reality, there is a possibility of contacting the primary and secondary power lines and communication lines, and there is a risk of various safety accidents caused by terminal damage, electric shock, or short circuit.

In order to solve the above problems, by developing a device for measuring the current of each phase by the probe attached to the transformer secondary line and wirelessly transmitting the measurement data to the terminal installed at the bottom of the transformer, connecting the connection line between the probe and the terminal The present invention provides a probe-integrated current voltage measurement and wireless transmitter that can eliminate the terminal and place the terminal at the bottom of the pole to provide convenience of installation and management.

In order to achieve the above object, the present invention provides an electric power flowing out of a transformer is connected to the low voltage line (A, B, C, N) through a secondary lowering line configured on one side of the transformer, to one side of the secondary lowering line A voltage or current measuring probe measuring voltage or current flowing in a low voltage trunk through a connected probe and transmitting the voltage or current to the terminal through a wireless network, wherein the current flowing in the lower line is in direct contact with the secondary cut line of the transformer. A coil unit that measures and provides the power required for the probe from the current flowing through the secondary cutoff line, and converts an AC signal into a direct current, converts it into a digital signal, checks the power supply state, and Control unit for controlling the overall operation of the voltage and current measurement probe, such as connection to the device, status display of the device, wireless transmission, and the measurement in the coil unit Analog input interlocking unit that provides an interface function for converting the output of the voltage, current, or the like to a digital signal, and DC for converting the AC signal introduced into the coil unit according to the control signal of the controller into a DC signal. In response to a power supply unit and a control signal of the control unit, the analog unit converts an analog signal of a current and a voltage of a secondary down line into a digital signal from the coil unit, and measures an effective value and an instantaneous value of a secondary load current or a load voltage of a transformer. When the voltage or current measured by the coil unit is converted into a DC signal through the DC power supply unit in response to the A / D converter and the control unit transmitted to the control unit according to the control signal of the control unit, the battery configured on one side of the probe A power management unit for controlling charging and discharging, operating according to a control signal of the control unit, and a probe and an external monitor device A serial communication unit for transmitting a corresponding measured current or voltage so as to monitor the operation state of the probe in real time from the outside, and setting information for measuring voltage or current according to a control signal of the controller. And a memory unit configured to store driving information, an SRAM required for F / W operation of the probe, an EEPROM for storing setting information, and a memory unit for storing corresponding information for downloading and modifying an F / W program; According to the control signal of the present invention, RTC (Real Time Clock) for providing the time information necessary for the operation of the probe of the current, voltage measurement of the present invention, and operates in response to the control signal of the control unit, LED indicator is mounted and A display unit for identifying a normal, abnormal, overload, power outage, and the like, and the secondary reduction according to a control signal of the controller. When the analog signal of the voltage or current introduced from the line is converted and measured by the A / D converter provides a probe-integrated current voltage measurement and wireless transmission device comprising a wireless communication unit for wirelessly transmitting the signal to the terminal.

At this time, according to an additional feature of the present invention, the analog input interlocking unit is normally connected to the DC power supply to be used to charge the battery through the power management unit, the A / D converter when measuring the current or voltage It is preferably made to measure the current value or the voltage value in connection with.

In addition, wireless communication between the wireless communication unit and the terminal uses a local area network, and it is preferable to wirelessly transmit and receive using RFID (Radio Frequency IDentification) communication or Zigbee communication.

In addition, according to an additional feature of the present invention, a low voltage main line (A, B, C, N) is connected to the probe connected to the secondary lower line of the transformer and the other side of the probe through a power line, respectively, Preferably, the RMS is measured through the probe and configured to wirelessly transmit to the terminal through the wireless communication unit.

The present invention relates to an apparatus for wirelessly transmitting measurement data to a terminal installed at a lower side of a column transformer after the probe attached to the secondary lowering line of the column transformer has measured current. By removing it, installation and maintenance of the probe can be simplified, and various safety accidents caused by contact of the power line / communication line between the probe and the terminal can be prevented in advance, and the installation position of the terminal can be closer to the ground than the base. The installation and maintenance of the terminal itself can be simplified, and the status of normal, abnormal, overload, power failure, etc. can be visually identified from the display of the device so that the instantaneous user can directly check the operation status of the pole transformer during site inspection of the distribution line. There is an advantage.

In addition, the present invention can simplify the installation and maintenance of the transformer load monitoring system terminal for power distribution.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a configuration diagram of a probe and a terminal as an embodiment of a distribution-type columnar transformer load monitoring system according to the present invention, Figure 3 shows a detailed configuration diagram of a probe-integrated current measurement and transmission apparatus according to the present invention, Figure 4 Is a flowchart illustrating an operating state of the probe-integrated current measurement and transmission device according to the present invention.

Referring to the configuration and operation of the probe-integrated current voltage measurement and transmission apparatus according to the present invention having the configuration as described above are as follows.

2 is a block diagram showing the configuration of the probe and the terminal according to the present invention. The detailed configuration of the block diagram is similar to that shown in FIG.

On the other hand, as shown in FIG. 2 by the device of the probe 100 to be described later in accordance with the object of the present invention without the configuration of the connection line 108 is connected between the probe 100 and the terminal 310 secondary It is configured to measure the current and voltage of the power transmitted by the lower line 107 and transmit it wirelessly to the terminal 310.

3 is a detailed configuration diagram of a probe-integrated current voltage measurement and transmission device, which is embedded in the probe 100 to measure current or voltage of each phase and transmits it to the terminal wirelessly.

Typically, the power flowing out of the transformer is connected to the low voltage main lines (A, B, C, N) through a secondary cut line configured on one side of the transformer, the voltage flowing through the low voltage main line through a probe connected to one side of the secondary cut line Alternatively, the current is measured, and reference numeral 200 denotes a coil part, which is a configuration of a probe according to the present invention, which is in direct contact with the secondary side cut-off line 107 of the transformer 103 and flows in the cut line 107. Or measure the voltage, and generates the power required for the probe-integrated device from the current flowing in the secondary cut line 107, 210 converts an AC signal into a direct current according to the current or voltage measured in the coil unit, digital A control unit for controlling the overall operation of the voltage and current measurement probe 100, such as converting into a signal, checking a power supply status, connecting to an external device, displaying a device status, and wireless transmission.

Reference numeral 220 is an analog input interlocking unit, and functions as an interface for converting the output of the voltage and current measured by the coil unit 200 into a direct current or transmitting it as a digital signal, and 230 controls the control unit 210. A DC power supply unit converts an AC signal introduced into the coil unit 200 into a DC signal according to a signal.

Reference numeral 240 denotes an A / D converter, which reacts according to a control signal of the controller 210 to convert an analog signal of current and voltage of the secondary cut line 107 from the coil part 200 into a digital signal. And measuring an effective value and an instantaneous value of a transformer secondary load current or load voltage to the main control part, and 250 reacts according to a control signal of the controller 210 to measure the voltage or current measured by the coil part 200. When the value is converted into a DC signal through the DC power supply 230, it indicates a power management unit that controls the charge and discharge of the battery 330 configured on one side of the probe 100.

In this case, the analog input interworking unit 220 is normally connected to the DC power supply 230 to be used to charge the battery through the power management unit 250, the A / D when measuring the current or voltage It is connected to the converter 240 and used to measure the current value or the voltage value.

In addition, the power management unit 250 operates in a charging mode in normal times, while controlling the charge and discharge of the battery, and operates in a use mode when measuring current and voltage, and performs a function of detecting occurrence of power failure.

Reference numeral 260 denotes a serial communication unit, which operates according to a control signal of the control unit 210, and makes a serial communication connection with a probe 100 and an external monitor device 320 measuring current or voltage of the present invention. Real-time monitoring of the operation state of the 100 or the F / W program can be downloaded and modified in the memory unit 280 to be described below, 270 according to the control signal of the control unit 210, voltage or current The setting information and the driving information for the measurement are stored, and the SRAM required for the F / W operation of the probe 100 and the EEPROM for storing the setting information.

Reference numeral 280 denotes a real time clock (RTC), and provides time information necessary for the operation of the probe 100 of the current and voltage measurement according to the control signal of the controller 210, and 290 denotes the controller ( It operates in response to the control signal of 210, and the LED indicator is mounted to identify the normal, abnormal, overload, power outage, etc. state of the probe 100, additionally directly to the device according to the user Attachable LCD panels can be attached.

Reference numeral 300 denotes a wireless communication unit. When the analog signal of the voltage or current flowing from the secondary cut line 107 is converted and measured through the A / D converter 240 according to the control signal of the controller 210, The signal is transmitted to the terminal 310 through the wireless communication unit 300.

In this case, the wireless communication unit 300 may be configured to interwork with the terminal 310 using radio frequency identification (RFID) communication or Zigbee communication according to a user.

The terminal 310 transmits and receives a voltage or current value measured by the probe 100 wirelessly through the wireless communication unit 300, a wireless transmission / reception structure, radio frequency identification (RFID) communication, and Zigbee communication. It is preferable that this is constituted.

Hereinafter, the state of the probe according to the operation flowchart of the probe-integrated current measurement and transmission device of the present invention according to the accompanying Figure 4,

First, the state of the probe-integrated current voltage measurement and transmission device of the present invention is checked, and the unique number of the memory unit 270, the phase information, the displacement part number, the transformer capacity, etc., by the initialization and self-diagnosis of the probe 100 device. If the device information, current, voltage history information of the check state is normal, the power management unit 250 is switched to the standby state, that is, the charging mode of the battery 320. Thereafter, the probe 100 is installed on the secondary lowering line 107 of the transformer to be measured to check whether the current and voltage values measured by the probe 100 are wirelessly communicated between the probe 100 and the terminal 310. For the confirmation procedure between the pre-probe 100 and the terminal 310,

If the probe 100 displays the normal state by calling the terminal 310, the probe 100 receives the data transmitted from the terminal 310 and analyzes the corresponding content to change the operation history of the probe 100 and the probe 100. Transmits the measured voltage or current to the terminal 310.

At this time, when the information called from the probe 100 to the terminal 310 during the above procedure occurs, the power failure state is transmitted to the probe 100 to modify, change, and measure the operation history of the probe 100. A procedure of transmitting a voltage or current value to the terminal 310 is performed.

In addition, if the power failure does not occur, the procedure of charging the battery 320 of the probe 100 proceeds, and if the battery 320 is displayed in the normal state, the power management unit 250 is switched to the standby mode to proceed with the above procedure.

Referring to the procedure for measuring the current or voltage using the probe 100 according to the present invention after checking the state between the probe 100 and the terminal 310 as described above,

First, by the above self-diagnosis, the probe 100 in the steady state is attached to the secondary lowering line 107 of the transformer 103 and the low voltage trunks A, B, and C to be measured as shown in FIG. Connect.

The current is measured and transmitted to the terminal 310 through the probe 100 connected as described above, and the current flowing through the coil part 200 of the probe 100 in direct contact with the secondary lowering line 107. When the value of is measured, the output value of the current measured by the coil unit 200 in the analog input interlocking unit 220 transmits the corresponding output value to the A / D converter 240.

At this time, the A / D converter 240 converts the analog signal of the output value transmitted according to the control signal of the controller 210 into a digital signal, and measures the effective value and the instantaneous value of the secondary load current of the transformer to measure the main control word. Transfer to negative.

The DC power supply 230 converts an AC signal introduced into the coil unit 200 into a DC signal, and controls a charge / discharge of the battery 330 configured on one side of the probe 100. Transmission to the management unit may generate power required for the probe 100 integrated device from the current flowing in the secondary lowering line 107.

In this case, the analog input interworking unit 220 is normally connected to the DC power supply 230 to be used to charge the battery through the power management unit 250, the A / D when measuring the current or voltage It is connected to the converter 240 and used to measure the current value or the voltage value.

In addition, the power management unit 250 operates in the charging mode during normal operation, and controls the discharge of the battery, and operates in the discharge mode when measuring current and voltage, and performs the function of detecting the occurrence of power failure.

The measured and converted current value transmitted to the controller 210 by the above procedure is operated by the serial communication unit 260 connected in series communication with the probe 100 and the external monitor device 320. Real-time monitoring of the status from the outside, or can download and modify the F / W program of the memory unit 280

On the other hand, the memory unit 270 is composed of the SRAM required for the F / W operation of the probe 100, and EEPROM for storing the setting information, according to the control signal of the control unit 210, for measuring the voltage or current Setting information and driving information are stored.

In addition, the RTC (Real Time Clock) (280) for measuring the current of the probe 100 provides the time information necessary for the operation of the current measurement in accordance with the control signal of the controller 210, LED indicator is mounted The display unit 290 provides identification of a normal, abnormal, overload, power failure, or the like state of the probe 100 in response to a control signal of the control unit 210.

In this case, the display unit 290 may additionally attach an LCD panel that can be directly connected to the device according to the user.

The current value of the transformer 103 measured by the coil unit 200 by the above process is transmitted to the terminal 310 through the wireless communication unit 300.

In this case, the wireless communication between the wireless communication unit 300 and the terminal 310 uses a local area network, and may use RFID (Radio Frequency IDentification) communication or Zigbee communication according to a user.

The voltage measuring procedure through the probe 100 measures the voltage flowing in the low voltage trunk through the probe 100 connected to the secondary lower line of the transformer 103 as shown in FIG. 2.

Thereafter, the voltage measurement procedure through the probe 100 measures the effective value of the corresponding voltage through the same procedure as the current measurement procedure and transmits the effective value to the terminal 310 through the wireless communication unit 300.

In this case, the wireless communication between the wireless communication unit 300 and the terminal 310 uses a local area network, and may use RFID (Radio Frequency IDentification) communication or Zigbee communication according to a user.

The present invention is not limited to the embodiments described above, and various modifications and changes can be made by those skilled in the art, which are included in the spirit and scope of the present invention as defined in the appended claims.

1 is a block diagram showing the configuration of a probe and a terminal of a conventional pole load transformer load monitoring system

Figure 2 is a configuration diagram of the probe and the terminal as an embodiment of the load monitoring system for the distribution columnar transformer according to the present invention

Figure 3 is a detailed configuration of the probe-integrated current measurement and transmission apparatus according to the present invention

4 is a flowchart illustrating an operating state of the probe-integrated current measurement and transmission device according to the present invention.

<Explanation of symbols for main parts of the drawings>

100: probe

200: coil unit 210: control unit

220: analog input interface 230: DC power supply

240: A / D converter 250: power management unit

260: serial communication unit 270: RTC

280: memory section 290: display section

300: wireless communication unit 310: terminal

320: external monitor device 330: battery

Claims (4)

The power flowing out of the transformer is connected to the low voltage main lines (A, B, C, N) through the secondary cut line configured on one side of the transformer, and the voltage or current flowing through the low voltage main line through the probe connected to one side of the secondary cut line. In the voltage or current measurement probe for measuring and transmitting to the terminal through a wireless network, The coil unit which directly contacts the secondary side down line 107 of the transformer 103 to measure a current flowing through the down line 107, and provides power required for the probe from the current flowing through the secondary down line 107. Wow, According to the current or voltage measured by the coil unit 200, converts an AC signal into a direct current, converts it into a digital signal, checks the power supply status, connects to an external device, displays the device status, wirelessly transmits a voltage and current measuring probe ( A control unit for controlling the operation of 100); An analog input interlocking unit for providing an interface function to convert the output of the voltage and current measured by the coil unit 200 into direct current or to transmit the digital signal; A DC power supply unit for converting an AC signal introduced into the coil unit 200 into a DC signal according to a control signal of the controller 210; Responding according to the control signal of the control unit 210 to convert the analog signal of the current, voltage of the secondary cut-off line 107 from the coil unit 200 into a digital signal, the effective of the transformer secondary load current or load voltage An A / D converter for measuring a value and an instantaneous value and transmitting the measured value and an instantaneous value to the controller; When the voltage or current value measured by the coil unit 200 is converted into a DC signal through the DC power supply unit 230 in response to the control signal of the controller 210, the inner side of the probe 100 is configured. A power management unit for controlling charging and discharging of the battery 330; It operates according to the control signal of the control unit 210, the serial communication connection with the probe 100 and the external monitor device 320, the corresponding measurement so that the real-time monitoring of the operation state of the probe 100 from the outside A serial communication unit for transmitting a current or voltage, According to the control signal of the controller 210, the setting information and driving information for measuring the voltage or current is stored, and composed of an SRAM required for the F / W operation of the probe 100 and an EEPROM for storing the setting information. Memory unit for storing the information for downloading and modifying the F / W program, A real time clock (RTC) for providing time information necessary for the operation of the probe 100 for measuring current and voltage according to a control signal of the controller 210; A display unit which operates in response to a control signal of the control unit 210 and which is mounted with an LED indicator light and identifies a state of normal, abnormal, overload, and power failure of the probe 100; When the analog signal of the voltage or current flowing from the secondary cut line 107 is converted and measured through the A / D converter 240 according to the control signal of the controller 210, the corresponding signal is transmitted to the terminal 310. Probe integrated current voltage measurement and transmission device comprising a wireless communication unit for transmitting wireless. The method of claim 1, The analog input interworking unit is normally connected to the DC power supply unit 230 so as to be used to charge the battery through the power management unit 250, and connected to the A / D converter 240 when measuring current or voltage. Probe integrated current voltage measurement and wireless transmitter, characterized in that for measuring the current value or the voltage value. The method of claim 1, The wireless communication between the wireless communication unit 300 and the terminal 310 uses a local area network, and optionally includes a probe integrated radio transmission and reception using radio frequency identification (RFID) communication or Zigbee communication. Current voltage measurement and wireless transmitter. The method of claim 1, The probes connected to the secondary lowering line of the transformer 103 and the low voltage main lines A, B, C, and N are connected to the other side of the probe through power lines, respectively, and the effective value of the voltage flowing through the low voltage main line is measured by the probe 100. Probe integrated current voltage measurement and wireless transmission device, characterized in that configured to wirelessly transmit to the terminal 310 through the wireless communication unit by measuring through.

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