CN103035392B - There is the voltage transformer of carrier communication interface - Google Patents

Abstract

The invention relates to a voltage transformer with a carrier communication interface, which includes a voltage transformer body (2), and one or two high-voltage insulating bushings (1) of the voltage transformer body (2) are equipped with a carrier wave The communication device (3), the carrier communication device (3) is composed of a coupler (4), a carrier communication module (5) and an AC-DC conversion power module (6), and the two AC input terminals of the AC-DC conversion power module (6) are respectively connected to The two ends of the secondary side of the voltage transformer are connected, and the two DC output ends are respectively connected to the power input end of the carrier communication module (5). Using it, the carrier communication device does not need an external power supply for separate power supply, has a simple structure, saves installation costs, and can reduce the complexity of the device. It designs the coupler and the carrier communication module in the carrier communication device and installs them on the high-voltage insulating bushing of the voltage transformer, which simplifies the system structure and saves space.

Description

Potential Transformer with Carrier Communication Interface

technical field

The invention relates to electrical equipment, in particular to a voltage transformer.

Background technique

Power carrier communication is a carrier communication method that uses high-voltage transmission as a transmission path, and is used for dispatching communication, telecontrol, protection, production command, administrative business communication and various information transmissions of the power system. Power carrier communication consists of power line carrier machine, power line, and coupling equipment. Coupling equipment includes line traps, combined filters, coupling capacitors, high-frequency cables, etc. Coupling methods include phase-ground coupling, phase-phase coupling, hybrid coupling, etc. The coupling capacitor is connected between the combined filter and the high-voltage wire. Levels vary. The role of the coupling capacitor is to isolate the carrier equipment from the high voltage, operating overvoltage and lightning overvoltage on the power line, prevent high voltage from entering the communication equipment, and at the same time enable the high frequency carrier signal to be smoothly coupled to the high voltage line. At present, in the power carrier communication of 10KV voltage transformer, the coupling capacitor is connected to the power line through phase-ground coupling, and the carrier communication module needs to be powered by an external power supply alone, and the structure is complicated, which not only increases the installation cost, but also increases the installation cost. of complexity.

Contents of the invention

The object of the present invention is to provide a voltage transformer with a carrier communication interface that does not require an external power supply for a carrier communication device, has a simple structure, saves installation costs, and can reduce the complexity of the device.

The technical solution of the present invention is: it includes a voltage transformer body with high-voltage insulating bushings at both ends of the primary side, and a carrier communication device is installed on one or two high-voltage insulating bushings of the voltage transformer body , The carrier communication device is composed of a coupler, a carrier communication module and an AC-DC conversion power supply module. The two high-voltage terminals of the coupler are respectively connected with one end of the primary side of the phase line of the voltage transformer and the iron core of the voltage transformer. The two low-voltage terminals are respectively connected to the signal input and output terminals of the carrier communication module, the two AC input terminals of the AC-DC conversion power supply module are respectively connected to the two ends of the secondary side of the voltage transformer, and the two DC output terminals are respectively connected to the terminals of the carrier communication module. connected to the power input.

The technical effect of the invention is that the carrier communication device does not need an external power supply for separate power supply, the structure is simple, the installation cost is saved, and the complexity of the device can be reduced. It designs the coupler and the carrier communication module in the carrier communication device and installs them on the high-voltage insulating bushing of the voltage transformer, which simplifies the system structure and saves space. The carrier communication device samples from the secondary side of the voltage transformer and converts it into direct current through a simple power conversion device to provide power for the carrier communication device, which simplifies the inconvenience caused by a separate external power supply. The utility model has the advantages of reliable connection and simple structure.

Description of drawings

Fig. 1 is the schematic circuit diagram of the embodiment of the present invention;

Fig. 2 is a schematic structural diagram of an embodiment of the present invention;

Fig. 3 is a structural block diagram of the carrier communication module of the embodiment of the present invention;

FIG. 4 is a schematic diagram of an installation structure of a carrier communication device according to an embodiment of the present invention. the

Detailed ways

As shown in Figure 1, Figure 2, Figure 3, and Figure 4, it includes a voltage transformer body 2 with a high-voltage insulating bushing 1 at both ends of the primary side, and one or two voltage transformer bodies 2 A carrier communication device 3 is installed on the high-voltage insulating bushing 1. The carrier communication device 3 is composed of a coupler 4, a carrier communication module 5 and an AC-DC conversion power module 6. The two high-voltage terminals of the coupler 4 are respectively connected to the phase line of the voltage transformer. One end of the primary side of the coupler is connected to the iron core 21 of the voltage transformer, the two low-voltage terminals of the coupler 4 are respectively connected to the signal input and output terminals of the carrier communication module 5, and the two AC input terminals of the AC-DC conversion power supply module 6 are respectively connected to the voltage The two ends of the secondary side of the transformer are connected, and the two DC output ends are respectively connected to the power input end of the carrier communication module 5 .

The coupler 4 is composed of a coupling capacitor 41 and a coupling transformer 42, the coupling capacitor 41 is connected in series with the primary side of the coupling transformer 42, the other end of the coupling capacitor 41 is connected with one end of the primary side of the phase line of the voltage transformer, and the primary side of the coupling transformer 42 is The other end is connected to the iron core 21 of the voltage transformer, and the two low-voltage terminals of the coupling transformer 42 are respectively connected to the signal input and output ends of the carrier communication module 5 .

One or two high-voltage insulating bushings 1 of the voltage transformer body 2 are provided with a carrier communication device installation groove 11, and a carrier communication device installation groove 11 is provided with a static contact connected to the primary side of the voltage transformer phase line. Head 1 12, static contact 2 13, static contact 3 14 connected to the two ends of the secondary side of the voltage transformer, and static contact 4 15 connected to the iron core 21 of the voltage transformer, on the carrier communication device 3 There are four moving contacts 31 respectively connected with the first static contact 12, the second static contact 13, the third static contact 14 and the fourth static contact 15, and the four moving contacts 31 are respectively fixed on the carrier communication device by one end 3 on the elastic conductive sheet. The carrier communication device 3 is a rectangular block, and the positions of its four corners are respectively provided with mounting clips 33, and the positions of the four corners of the carrier communication device installation groove 11 are respectively provided with positioning cards matched with each mounting clip 33 Slot 16. When the carrier wave communication device 3 is installed on the high voltage insulating bushing 1 , a mounting handle 32 is provided on the outer surface.

Carrier communication module 5 is made of central processing unit 34, modulator 35, amplifier 36, demodulator 37, filter 38 and communication interface 39, and communication interface 39 is connected with central processing unit 34 for input and output communication signal, modulator 35 It is connected with the central processing unit 34 for modulating the communication signal transmitted from the central processing unit 34, and the amplifier 36 is respectively connected with the modulator 35 and the coupler 4 for amplifying the modulated signal and transmitting it to the coupler 4 , the filter 38 is connected with the coupler 4 and the demodulator 37 for filtering the signal transmitted from the coupler 4 and transmitted to the demodulator 37, and the demodulator 37 is connected with the central processing unit 34 for the slave The signal transmitted by the filter 38 is demodulated and transmitted to the central processing unit 34, and the DC output terminal of the AC-DC conversion power supply module 6 is connected with the central processing unit 34, modulator 35, amplifier 36, demodulator 37, filter 38 and The communication interfaces 39 are respectively connected to provide DC power for them.

The voltage transformer body 2 is composed of an iron core 21, a housing 22, a primary coil 23, a secondary coil 24 and two high-voltage insulating bushings 1, and the primary coil 23 and the secondary coil 24 are coupled and installed on the iron core 21. The two high-voltage insulating bushings 1 are fitted on both ends of the primary coil 23 and fixed on the housing 22 , and the two ends of the secondary coil 24 are respectively connected to two terminals 25 provided on the housing 22 .

The present invention uses method as follows:

The whole set of device design of the present invention is except that the surface conforms to the shape of the high-voltage insulating bushing, and the other surfaces are planes, similar to a cuboid. When in use, the carrier communication device can be pushed into the high-voltage insulating bushing by installing the handle. The 10KV transmission line is connected to the device through the top, the carrier communication optical fiber is led out from the side end, and the ground wire of the coupling capacitor and the secondary side of the capacitance transformer are respectively connected through the bottom end. If it needs to be replaced or repaired, just pull out the device through the handle.

The advantages of the present invention are:

1. Use the secondary side of the voltage transformer to supply power to the power carrier communication module.

2. The coupler, AC-DC conversion power supply module and carrier communication module are designed into the same device, and can be installed inside the high-voltage insulation bushing of the transformer, which simplifies the complexity of the whole device and basically maintains the original appearance of the voltage transformer. look.

3. The shape of the high-voltage insulating bushing and the wiring leads are redesigned, so that the carrier communication device can be well fixed inside the insulating bushing of the voltage transformer, and the handle on the carrier communication device can be easily taken out and installed.

Claims (4)

1. A voltage transformer with a carrier communication interface, which includes a voltage transformer body (2) with a high-voltage insulating bushing (1) at both ends of the primary side, and the voltage transformer body (2) consists of an iron core ( 21), shell (22), primary coil (23), secondary coil (24) and two high-voltage insulating bushings (1), the primary coil (23) and secondary coil (24) are coupled and installed on the iron On the core (21), two high-voltage insulating sleeves (1) are set on the two ends of the primary coil (23) and fixed on the shell (22), and the two ends of the secondary coil (24) are respectively connected to the device. On the two terminals (25) on the housing (22), it is characterized in that a carrier communication device (3) is installed on one or two high-voltage insulating bushings (1) of the voltage transformer body (2) ), the carrier communication device (3) is composed of a coupler (4), a carrier communication module (5) and an AC-DC conversion power supply module (6). One end of the primary side is connected to the iron core (21) of the voltage transformer, the two low-voltage terminals of the coupler (4) are respectively connected to the signal input and output terminals of the carrier communication module (5), and the two terminals of the AC-DC conversion power supply module (6) The two AC input terminals are respectively connected to the two ends of the secondary side of the voltage transformer, and the two DC output terminals are respectively connected to the power input terminals of the carrier communication module (5); the coupler (4) is composed of a coupling capacitor (41) and a coupling transformer (42), the coupling capacitor (41) is connected in series with the primary side of the coupling transformer (42), the other end of the coupling capacitor (41) is connected to one end of the primary side of the phase line of the voltage transformer, and the primary side of the coupling transformer (42) The other end is connected to the iron core (21) of the voltage transformer, and the two low-voltage terminals of the coupling transformer (42) are respectively connected to the signal input and output ends of the carrier communication module (5); the carrier communication module (5) is controlled by the central processing unit ( 34), modulator (35), amplifier (36), demodulator (37), filter (38) and communication interface (39), the communication interface (39) is connected with the central processing unit (34) for input output communication signal, the modulator (35) is connected with the central processing unit (34) for modulating the communication signal transmitted from the central processing unit (34), the amplifier (36) is connected with the modulator (35) and the coupler ( 4) respectively connected to amplify the modulated signal and transmit it to the coupler (4), the filter (38) is connected to the coupler (4) and the demodulator (37) respectively for the slave coupler (4) ) is filtered and transmitted to the demodulator (37), and the demodulator (37) is connected to the central processing unit (34) for demodulation processing and transmission of the signal transmitted from the filter (38) To the central processing unit (34), the DC output terminal of the AC-DC conversion power supply module (6) and the central processing unit (34), modulator (35), amplifier (36), demodulator (37), filter (38) They are respectively connected with the communication interface (39) to provide DC power for them. 2. The voltage transformer with carrier communication interface according to claim 1, characterized in that one or two high-voltage insulating bushings (1) of the voltage transformer body (2) are provided with a carrier communication device Installation slot (11), the installation slot (11) of the carrier communication device is provided with a static contact one (12) connected to the primary side of the phase line of the voltage transformer, and a static contact one (12) connected to the two ends of the secondary side of the voltage transformer respectively. Static contact 2 (13), static contact 3 (14) and static contact 4 (15) connected with the iron core (21) of the voltage transformer, the carrier communication device (3) is provided with the static contact Four moving contacts (31) connected by one (12), two static contacts (13), three (14) and four (15) static contacts, the four moving contacts (31) are connected by one end respectively It consists of an elastic conductive sheet fixed on the carrier communication device (3). 3. The voltage transformer with a carrier communication interface as claimed in claim 2, characterized in that the carrier communication device (3) is a rectangular block, and its four corners are respectively equipped with installation clips (33) , the positions of the four corners of the installation slot (11) of the carrier communication device are respectively provided with positioning slots (16) matched with each installation clip (33). 4. The voltage transformer with carrier communication interface according to claim 1, characterized in that when the carrier communication device (3) is installed on the high-voltage insulating bushing (1), the surface located on the outside is provided with an installation handle ( 32).