WO2017152316A1

WO2017152316A1 - Power measurement device employing power carrier technology

Info

Publication number: WO2017152316A1
Application number: PCT/CN2016/075730
Authority: WO
Inventors: 马骏
Original assignee: 马骏
Priority date: 2016-03-05
Filing date: 2016-03-05
Publication date: 2017-09-14

Abstract

A power measurement device employing a power carrier technology, comprising a housing (1), the front surface of the housing (1) being provided with control keys (2), a communication interface (4), a display interface (5), and state indicator lights (8). The upper part of the housing (1) is provided with a power interface (6) and a signal interface (7). The power measurement device employing the power carrier technology communicates in real time with an external general service station by means of the communication interface (4), and transmits carrier data with an adjacent device by means of the power interface (6), guaranteeing the reliability of signal transmission of the device and reducing the wiring cost. By means of a passive band-pass filter composed of a second inductor (L2), a second capacitor (C2), and a third capacitor (C3) in a carrier receiving circuit, the filtering reliability is ensured, and the power carrier stability and reliability of the device is improved. Meanwhile, since a first capacitor (C1) has a short-circuit protection function, and a first resistor (R1) is an unloading resistor for providing a channel for the discharge of the first capacitor (C1) when the device is offline and preventing a high voltage at the input end of the device, the reliability of the device is further improved.

Description

Electric power measuring device using power carrier technology

Technical field

The present invention relates to a power measuring device employing power carrier technology.

Background technique

In the current power system, after measuring the parameters of the power grid, it is necessary to transmit the data to the general service station for monitoring by means of communication.

In the prior art, the communication reliability of the wired communication is high, but the application cost of the device is greatly improved due to the high wiring cost; the power carrier communication technology transmits the signal through the power line, although the wiring cost is greatly reduced, but due to the signal resistance Poor interference capability reduces the reliability of communication of the device.

Summary of the invention

The technical problem to be solved by the present invention is to provide a combination of wired communication and power carrier communication technology and reliable communication in order to overcome the disadvantages of high wired wiring technology and poor anti-interference ability of power carrier communication technology. Power measurement equipment using power carrier technology with high stability.

The technical solution adopted by the present invention to solve the technical problem thereof is: a power measuring device using a power carrier technology, comprising a casing, wherein a front surface of the casing is provided with a control button, a storage interface, a communication interface, a display interface and a status indication a lamp, a power interface and a signal interface are disposed above the casing, a central control device is disposed in the casing, the central control device is a PLC, the control button, a storage interface, a communication interface, a display interface, and a power source The interface, signal interface and status indicator are electrically connected to the central control unit;

The central control device includes a carrier communication module, the power interface is electrically connected to the carrier communication module, the carrier communication module includes a carrier transmitting circuit and a carrier receiving circuit, and the carrier receiving circuit includes a bidirectional diode, a first capacitor, and a second Capacitor, third capacitor, fourth capacitor, first inductor, first a second inductor, a transformer, a first resistor, a second resistor, a third resistor, a first diode, a second diode, a third diode, a fourth diode, and a fifth diode, the transformer One end of the input loop is connected to the other end of the input loop of the transformer through a series circuit composed of a bidirectional diode, a first capacitor and a first inductor, the first resistor is connected in parallel with the first capacitor, and the output loop of the transformer is first An anti-serial circuit of the diode and the second diode is connected, a cathode of the third diode is grounded, and an anode of the third diode is respectively connected to an anode and a second diode of the first diode An anode connection, an output loop of the transformer is connected in parallel with a series circuit composed of a second resistor and a second inductor, the second capacitor is connected in parallel with the second inductor, and the third capacitor is connected in parallel with the second capacitor, the third a series circuit of a resistor and a fourth diode is connected in parallel with a third capacitor, the fifth diode is anti-parallel with the fourth diode, and the fourth capacitor is respectively connected to the cathode and the fourth of the fifth diode Anode connection of the diode, the fifth two Grounded cathode and an anode of the fourth diode tube.

Advantageously, said storage interface is a USB interface.

Advantageously, said communication interface is an Ethernet interface.

Preferably, in order to increase the utility of the device indication, the status indicator is a two-color diode.

Preferably, in order to improve the safety of the device, the flame retardant rating of the housing, the power interface and the signal interface are both V0.

Preferably, the central control device is provided with a wireless communication module, and the wireless communication module transmits a wireless signal through Bluetooth.

Preferably, the transient suppression diode is used to prevent the inrush current, and the reliability of the device is improved. The bidirectional diode is a transient suppression diode.

Preferably, the third capacitor is a tunable capacitor.

Preferably, the fourth diode and the fifth diode are both Zener diodes.

The invention has the beneficial effects that the power measuring device using the power carrier technology passes through the communication interface Real-time communication with the external service desk, carrier data transmission with adjacent devices through the power interface, ensuring the reliability of the signal transmission of the device and reducing the wiring cost; passing the second inductor and the second capacitor in the carrier receiving circuit The passive band-pass filter composed of the third capacitor ensures the reliability of the filtering, improves the stability and reliability of the power carrier of the device, and has the short-circuit protection function through the first capacitor, and the first resistor is the unloading resistor. It is used to provide a channel for discharging the first capacitor when the device is offline, preventing high voltage from appearing at the input end of the device, further improving the reliability of the device.

DRAWINGS

The invention will now be further described with reference to the drawings and embodiments.

1 is a schematic structural diagram of a power measuring device using power carrier technology of the present invention;

2 is a circuit schematic diagram of a carrier receiving circuit of a power measuring device using power carrier technology of the present invention;

In the figure: 1. housing, 2. control button, 3. storage interface, 4. communication interface, 5. display interface, 6. power interface, 7. signal interface, 8. status indicator, TVS. bidirectional diode, C1 First capacitor, C2. second capacitor, C3. third capacitor, C4. fourth capacitor, L1. first inductor, L2. second inductor, T1. transformer, R1. first resistor, R2. second resistor , R3. Third resistor, D1. First diode, D2. Second diode, D3. Third diode, D4. Fourth diode, D5. Fifth diode.

detailed description

The invention will now be described in further detail with reference to the drawings. The drawings are simplified schematic diagrams, and only the basic structure of the present invention is illustrated in a schematic manner, and thus only the configurations related to the present invention are shown.

As shown in FIG. 1 and FIG. 2, a power measuring device using a power carrier technology includes a housing 1 having a control button 2, a storage interface 3, a communication interface 4, a display interface 5, and a front surface of the housing 1 The status indicator 8 is provided above the housing 1 with a power interface 6 and a signal interface 7. The housing 1 is provided with a central control device, the central control device is a PLC, the control button 2, and a storage interface 3, through The interface 4, the display interface 5, the power interface 6, the signal interface 7, and the status indicator 8 are all electrically connected to the central control device;

The central control device includes a carrier communication module, the power interface 6 is electrically connected to the carrier communication module, the carrier communication module includes a carrier transmitting circuit and a carrier receiving circuit, and the carrier receiving circuit includes a bidirectional diode TVS and a first capacitor C1. a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first inductor L1, a second inductor L2, a transformer T1, a first resistor R1, a second resistor R2, a third resistor R3, and a first diode D1. a second diode D2, a third diode D3, a fourth diode D4, and a fifth diode D5. One end of the input circuit of the transformer T1 passes through the bidirectional diode TVS, the first capacitor C1, and the first A series circuit composed of an inductor L1 is connected to the other end of the input circuit of the transformer T1. The first resistor R1 is connected in parallel with the first capacitor C1. The output loop of the transformer T1 is connected to the first diode D1 and the second diode. The reverse series circuit of D2 is connected, the cathode of the third diode D3 is grounded, and the anode of the third diode D3 is respectively connected to the anode of the first diode D1 and the anode of the second diode D2, The output circuit of the transformer T1 and the second electric A series circuit composed of R2 and a second inductor L2 is connected in parallel, the second capacitor C2 is connected in parallel with the second inductor L2, the third capacitor C3 is connected in parallel with the second capacitor C2, and the third resistor R3 and the fourth diode The series circuit composed of D4 is connected in parallel with the third capacitor C3, and the fifth diode D5 is anti-parallel with the fourth diode D4, and the fourth capacitor C4 is respectively connected to the cathode of the fifth diode D5 and the fourth two The anode of the pole D4 is connected, and the anode of the fifth diode D5 and the cathode of the fourth diode D4 are grounded.

Preferably, the storage interface 3 is a USB interface.

Preferably, the communication interface 4 is an Ethernet interface.

Preferably, in order to improve the utility of the device indication, the status indicator 8 is a two-color diode.

Preferably, in order to improve the safety of the device, the housing 1, the power interface 6 and the signal interface The flame retardant rating of 7 is V0.

Preferably, the transient suppression diode has a characteristic of preventing inrush current, and the reliability of the device is improved, and the bidirectional diode TVS is a transient suppression diode.

Preferably, the third capacitor C3 is a tunable capacitor.

Preferably, the fourth diode D4 and the fifth diode D5 are both Zener diodes.

In the carrier receiving circuit of the power measuring device using the power carrier technology, since the input carrier signal needs to be filtered, the passive filter is due to the active filter, because the active filter generates a signal equivalent to the carrier receiving signal. The white noise, the circuit adopts a passive band-pass filter composed of a second inductor L2, a second capacitor C2, and a third capacitor C3, which ensures the reliability of the filtering and improves the stability and reliability of the power carrier of the device; At the same time, the carrier coupling part of the circuit is composed of a transformer T1, a first capacitor C1, and a first inductor L1. The first capacitor C1 isolates the transformer T1 from the power frequency AC, so that the communication circuit can completely isolate the power frequency signal of the power network, so that The first capacitor C1 has a short-circuit protection function, and the first resistor R1 is an unloading resistor for providing a channel for discharging the first capacitor C1 when the device is offline, preventing the The high voltage at the input of the device further improves the reliability of the device; not only that, the fourth diode D4 and the fifth diode D5 are both voltage regulators. , Through the fourth diode D4 and the fifth diode D5 constituting a bidirectional regulator, for the differential mode signal has a peak absorption and improve the reliability of the circuit.

In the power measuring device using the power carrier technology, the control button 2 is used to control the device, and the utility of the device is improved; the storage interface 3 is used for on-site downloading of the power measurement data of the device; the communication interface 4 is used for external The main service desk performs real-time communication, which is convenient for the staff to monitor the grid parameters in real time; the display interface 5 is used to display related information; the power interface 6 is used to supply power to the equipment. Voltage; signal interface 7 is used to detect the grid parameters; status indicator 8 is used to display the working state of the device.

Compared with the prior art, the power measuring device using the power carrier technology communicates with the external total service station through the communication interface 4, and performs carrier data transmission with the adjacent device through the power interface 6, thereby ensuring signal transmission of the device. The reliability and the wiring cost are reduced; the passive band-pass filter composed of the second inductor L2, the second capacitor C2 and the third capacitor C3 in the carrier receiving circuit ensures the reliability of the filtering and improves the power carrier of the device. Stable and reliable; at the same time, the first capacitor C1 has a short-circuit protection function, and the first resistor R1 is an unloading resistor for providing a channel for discharging the first capacitor C1 when the device is offline, preventing high voltage from appearing at the input end of the device, further Improve the reliability of the equipment.

In view of the above-described embodiments of the present invention, various changes and modifications may be made by those skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and the technical scope thereof must be determined according to the scope of the claims.

Claims

A power measuring device using a power carrier technology, comprising: a housing (1), a front side of the housing (1) is provided with a control button (2), a storage interface (3), and a communication interface (4) a display interface (5) and a status indicator (8), above the housing (1) is provided with a power interface (6) and a signal interface (7), wherein the housing (1) is provided with a central control device The central control device is a PLC, the control button (2), a storage interface (3), a communication interface (4), a display interface (5), a power interface (6), a signal interface (7), and a status indicator (8) are electrically connected to the central control unit;

The central control device includes a carrier communication module, the power interface (6) is electrically connected to a carrier communication module, the carrier communication module includes a carrier transmitting circuit and a carrier receiving circuit, and the carrier receiving circuit includes a bidirectional diode (TVS), First capacitor (C1), second capacitor (C2), third capacitor (C3), fourth capacitor (C4), first inductor (L1), second inductor (L2), transformer (T1), first resistor (R1), second resistor (R2), third resistor (R3), first diode (D1), second diode (D2), third diode (D3), fourth diode (D4) and a fifth diode (D5), a series circuit and a transformer comprising one end of the input circuit of the transformer (T1) through a bidirectional diode (TVS), a first capacitor (C1) and a first inductor (L1) The other end of the input circuit of (T1) is connected, the first resistor (R1) is connected in parallel with the first capacitor (C1), and the output loop of the transformer (T1) is connected to the first diode (D1) and the second The reverse series circuit of the pole tube (D2) is connected, the cathode of the third diode (D3) is grounded, and the anode of the third diode (D3) is respectively connected to the anode of the first diode (D1) Second diode (D2) An anode is connected, an output circuit of the transformer (T1) is connected in parallel with a series circuit composed of a second resistor (R2) and a second inductor (L2), and the second capacitor (C2) is connected in parallel with the second inductor (L2). The third capacitor (C3) is connected in parallel with the second capacitor (C2), and the series circuit composed of the third resistor (R3) and the fourth diode (D4) is connected in parallel with the third capacitor (C3), the fifth The diode (D5) is anti-parallel to the fourth diode (D4), and the fourth capacitor (C4) is respectively connected to the cathode of the fifth diode (D5) and the anode of the fourth diode (D4) The anode of the fifth diode (D5) and the fourth diode (D4) The cathode is grounded.
The power measuring device using power carrier technology according to claim 1, wherein the storage interface (3) is a USB interface.
A power measuring device using power carrier technology according to claim 1, wherein said communication interface (4) is an Ethernet interface.
A power measuring device using power carrier technology according to claim 1, wherein said status indicator (8) is a two-color diode.
The power measuring device using the power carrier technology according to claim 1, wherein the casing (1), the power interface (6) and the signal interface (7) have a flame retardant rating of V0.
The power measuring device using the power carrier technology according to claim 1, wherein the central control device is provided with a wireless communication module, and the wireless communication module transmits a wireless signal through Bluetooth.
A power measuring device using power carrier technology according to claim 1, wherein said two-way diode (TVS) is a transient suppression diode.
The power measuring device using power carrier technology according to claim 1, wherein the third capacitor (C3) is a tunable capacitor.
The power measuring device using power carrier technology according to claim 1, wherein the fourth diode (D4) and the fifth diode (D5) are Zener diodes.