Single-phase electromagnetic voltage transformer integrated with carrier communication function

Abstract

The invention belongs to the technical field of pole-mounted circuit breakers in power systems, and particularly relates to a single-phase electromagnetic voltage transformer integrated with a carrier communication function. A primary side coil and a secondary side power supply coil are wound on the magnetic core, the fuse tube is installed on an end line of the primary side coil, the isolation transformer is connected to the end line of the primary side coil through the high-voltage capacitor, and the carrier wave sending circuit is connected to a circuit where a coil on the secondary side of the isolation transformer is located. Compared with the prior art, the single-phase electromagnetic voltage transformer has the beneficial effects that the capacitance coupler and the single-phase electromagnetic voltage transformer are fused together, so that the power failure construction frequency of a 10kV line is reduced, the installation number of 10kV line equipment is reduced, and the construction difficulty is reduced; by integrating the carrier machine sending circuit in the single-phase electromagnetic voltage transformer, the loss of a transmission line is reduced, the sending power of the carrier is increased, and the medium-voltage carrier communication distance and the success power are increased.

Description

Technical Field

[0001] The invention belongs to the technical field of single-phase electromagnetic voltage transformers, and in particular relates to a single-phase electromagnetic voltage transformer integrating a carrier communication function. Background Art

[0002] In traditional medium-voltage carrier communication, it is necessary to install a capacitor coupler in the 10kV power grid to realize carrier signal feed transmission, and at the same time, it is necessary to install a single-phase electromagnetic voltage transformer to provide power to the equipment. The problem is that the 10kV line needs to be shut down twice for construction, and two devices need to be installed, which increases the complexity of construction. In traditional medium-voltage carrier communication, the carrier machine is generally installed near the ground meter box, and there is a signal line of 8 meters or more between the capacitor coupler installed on the 10kV line, which causes serious attenuation of the carrier transmission signal. The carrier signal power sent to the 10kV line is too small, affecting the carrier communication distance. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the present invention provides a single-phase electromagnetic voltage transformer integrating a carrier communication function.

[0004] The technical solution adopted by the present invention to solve its technical problems is as follows: a single-phase electromagnetic voltage transformer integrating carrier communication function, comprising: a fuse tube and a magnetic core, a primary side coil and a secondary side power supply coil are wound on the magnetic core, the fuse tube is installed on the end wire of the primary side coil, and also comprises: a high-voltage capacitor, an isolation transformer and a carrier transmission circuit, the isolation transformer is connected to the end wire of the primary side coil through the high-voltage capacitor, and the carrier transmission circuit is connected to the circuit where the coil on the secondary side of the isolation transformer is located.

[0005] Furthermore, a high voltage capacitor is connected to the terminal line between the magnetic core and the fuse tube.

[0006] Furthermore, the fuse tube includes: a first fuse tube and a second fuse tube, and the first fuse tube and the second fuse tube are respectively installed on the end wires at both ends of the primary side coil; the isolation transformer includes: a first isolation transformer and a second isolation transformer, the first isolation transformer is connected to the end wire between the magnetic core and the first fuse tube through a first high-voltage capacitor, and the second isolation transformer is connected to the end wire between the magnetic core and the second fuse tube through a second high-voltage capacitor.

[0007] Furthermore, one side of the carrier transmission circuit is connected to the T1 secondary side circuit of the first isolation transformer, and the other side is connected to the T2 secondary side circuit of the second isolation transformer.

[0008] Furthermore, it also includes: a secondary side metering coil, which is wound on the magnetic core and is located on the same side as the secondary side power supply coil.

[0009] Furthermore, the primary coil of the isolation transformer is grounded.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: by integrating the capacitive coupler with the single-phase electromagnetic voltage transformer, the number of 10kV line power outage construction times is reduced, the number of 10kV line equipment installations is reduced, and the construction difficulty is reduced; by integrating the carrier transmission circuit into the single-phase electromagnetic voltage transformer, the transmission line loss is reduced, the carrier transmission power is increased, and the medium-voltage carrier communication distance and success power are increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of a single-phase electromagnetic voltage transformer integrating carrier communication function;

[0012] Figure 2 It is the schematic diagram of the original single-phase electromagnetic voltage transformer;

[0013] Figure 3 It is the schematic diagram of the original capacitive coupler;

[0014] Figure 4 This is a schematic diagram of the connection method between devices in a traditional medium-voltage carrier communication system.

[0015] In the figure:

[0016] 1. First fuse tube, 2. Second fuse tube, 3. Magnetic core, 4. Primary side coil, 5. Secondary side power supply coil, 6. Secondary side metering coil, 7. First high-voltage capacitor, 8. First isolation transformer, 9. Second high-voltage capacitor, 10. Second isolation transformer, 11. Carrier transmission circuit, 12. T1 primary side, 13. T1 secondary side, 14. T2 primary side, 15. T2 secondary side,

[0017] 01. Original single-phase electromagnetic voltage transformer, 02. Original capacitor coupler, 03. Medium voltage carrier machine,

[0018] 101. Fuse tube A, 102. Fuse tube B, 103. Magnetic core A, 104. Primary side coil A, 105. Secondary side power supply coil A, 106. Secondary side metering coil A,

[0019] 201. Fuse tube C, 202. High voltage capacitor A, 203. Isolation transformer A. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0021] Combination Figure 1It is understood that a single-phase electromagnetic voltage transformer integrating carrier communication function includes: a fuse tube and a magnetic core 3, a primary side coil 4 and a secondary side power supply coil 5 are wound on the magnetic core 3, the fuse tube is installed on the end line of the primary side coil 4, and also includes: a high-voltage capacitor, an isolation transformer and a carrier transmission circuit 11, the isolation transformer is connected to the end line of the primary side coil 4 through the high-voltage capacitor, and the carrier transmission circuit 11 is connected to the circuit where the coil on the secondary side of the isolation transformer is located.

[0022] In one embodiment, the high voltage capacitor is connected to the terminal line between the magnetic core 3 and the fuse tube.

[0023] In one embodiment, the fuse tube includes: a first fuse tube 1 and a second fuse tube 2, which are respectively installed on the end wires at both ends of the primary side coil 4; the isolation transformer includes: a first isolation transformer 8 and a second isolation transformer 10, the first isolation transformer 8 is connected to the end wire between the magnetic core 3 and the first fuse tube 1 through a first high-voltage capacitor 7, and the second isolation transformer 10 is connected to the end wire between the magnetic core 3 and the second fuse tube 2 through a second high-voltage capacitor 9.

[0024] In one embodiment, one side of the carrier transmission circuit 11 is connected to the T1 secondary side 13 of the first isolation transformer 8 , and the other side is connected to the T2 secondary side 15 of the second isolation transformer 10 .

[0025] In one embodiment, it further includes: a secondary side metering coil 6 , which is wound on the magnetic core 3 and located on the same side as the secondary side power supply coil 5 .

[0026] In one embodiment, the primary coil of the isolation transformer is grounded.

[0027] Embodiment 1: A single-phase electromagnetic voltage transformer integrated with carrier communication function. The core of the solution is to integrate the original capacitive coupler 02 with the original single-phase electromagnetic voltage transformer 01 and integrate the carrier transmission circuit 11.

[0028] Combination Figure 2 To understand, the original single-phase electromagnetic voltage transformer 01 in the prior art is described as follows: a primary coil A104, a secondary power supply coil A105 and a secondary metering coil A106 are wound on a magnetic core A103, one end line of the primary coil A104 is connected to phase A of the 10kV line through a fuse tube A101, and the other end line is connected to phase B through a fuse tube B102.

[0029] Combination Figure 3 Understand, the original capacitor coupler 02 in the prior art is described: one end of the high-voltage capacitor A202 is connected to the B phase of the 10kV line through the fuse C201, and the other end is connected to the primary coil of the isolation transformer A203, and the primary coil output line is grounded.

[0030] Combination Figure 4 Understand the connection mode between the devices of the traditional medium-voltage carrier communication system: the medium-voltage carrier machine 03 is connected to the 10kV line through the original capacitor coupler 02 on one side and the original single-phase electromagnetic voltage transformer 01 on the other side. There is a signal line of more than eight meters between the medium-voltage carrier machine 03 and the original capacitor coupler 02, which attenuates the carrier signal to a certain extent, resulting in a large power attenuation of the carrier signal sent to the 10kV power grid.

[0031] Combine the following Figure 1 The fusion design scheme of this embodiment is described in detail:

[0032] A single-phase electromagnetic voltage transformer with integrated carrier communication function comprises: a first fuse tube 1, a second fuse tube 2, a magnetic core 3, a primary coil 4, a secondary power supply coil 5, a secondary metering coil 6, a second high-voltage capacitor 9, a second isolation transformer 10 and a carrier transmission circuit 11; the primary coil 4, the secondary power supply coil 5 and the secondary metering coil 6 are wound on the magnetic core 3, one end line of the primary coil 4 is connected to the A phase of the 10kV line through the first fuse tube 1, and the other end line is connected to the B phase of the 10kV line through the second fuse tube 2; one end of the second high-voltage capacitor 9 is connected to the B phase of the 10kV line through the second fuse tube 2, and the other end is connected to the T2 primary side 14 of the second isolation transformer 10, and the other side of the T2 primary side 14 is grounded; the carrier transmission circuit 11 is connected to the circuit where the T2 secondary side 15 of the second isolation transformer 10 is located.

[0033] Embodiment 2: Based on Embodiment 1, it also includes: a first high-voltage capacitor 7 and a first isolation transformer 8, one end of the first high-voltage capacitor 7 is connected to the A phase of the 10kV line through the first fuse 1, and the other end is connected to the T1 primary side 12 of the first isolation transformer 8, and the other side of the T1 primary side 12 is grounded; the T1 secondary side 13 end of the first isolation transformer 8 is connected to the carrier transmission circuit 11.

[0034] In this embodiment, the single-phase electromagnetic voltage transformer with integrated carrier communication function has two-phase capacitor couplers inside. The first fuse tube 1, the first high-voltage capacitor 7 and the first isolation transformer 8 constitute an original capacitor coupler 02. The second fuse tube 2, the second high-voltage capacitor 9 and the second isolation transformer 10 also constitute an original capacitor coupler 02. That is to say, the end wires at both ends of the primary coil 4 are respectively connected to the original capacitor coupler 02, realizing the sharing of the fuse tube. The output of the carrier transmission circuit 11 is respectively connected to the secondary side of the isolation transformer of the two internal capacitor couplers.

[0035] Working process: The carrier signal sent by the medium-voltage carrier machine is transmitted through the signal line to the carrier transmission circuit 11 inside the single-phase electromagnetic voltage transformer with integrated carrier communication function. After the power amplification of the carrier transmission circuit 11, the signal is output to the two-phase capacitor coupler, and transmitted to the 10kV power line through the first fuse tube 1 and the second fuse tube 2. By integrating the capacitor coupler with the single-phase electromagnetic voltage transformer, the number of power outages for 10kV line construction is reduced, the number of 10kV line equipment installations is reduced, and the construction difficulty is reduced; by integrating the carrier machine transmission circuit into the single-phase electromagnetic voltage transformer, the transmission line loss is reduced, the carrier transmission power is increased, and the medium-voltage carrier communication distance and success power are increased.

[0036] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A single-phase electromagnetic voltage transformer integrating carrier communication function, comprising: A fuse tube and a magnetic core (3), a primary side coil (4) and a secondary side power supply coil (5) are wound on the magnetic core (3), the fuse tube is installed on the end wire of the primary side coil (4), and is characterized in that it also includes: a high-voltage capacitor, an isolation transformer and a carrier transmission circuit (11), the isolation transformer is connected to the end wire of the primary side coil (4) through the high-voltage capacitor, and the carrier transmission circuit (11) is connected to the circuit where the coil on the secondary side of the isolation transformer is located.

2. The single-phase electromagnetic voltage transformer integrating carrier communication function according to claim 1 is characterized in that: The high-voltage capacitor is connected to the end line between the magnetic core (3) and the fuse tube.

3. The single-phase electromagnetic voltage transformer integrating carrier communication function according to claim 2 is characterized in that: The fuse tube comprises: a first fuse tube (1) and a second fuse tube (2), the first fuse tube (1) and the second fuse tube (2) being respectively mounted on the end wires at both ends of the primary side coil (4); the isolation transformer comprises: a first isolation transformer (8) and a second isolation transformer (10), the first isolation transformer (8) being connected to the end wire between the magnetic core (3) and the first fuse tube (1) via a first high-voltage capacitor (7), and the second isolation transformer (10) being connected to the end wire between the magnetic core (3) and the second fuse tube (2) via a second high-voltage capacitor (9).

4. The single-phase electromagnetic voltage transformer integrating carrier communication function according to claim 3 is characterized in that: One side of the carrier transmission circuit (11) is connected to the T1 secondary side (13) circuit of the first isolation transformer (8), and the other side is connected to the T2 secondary side (15) of the second isolation transformer (10).

5. The single-phase electromagnetic voltage transformer with integrated carrier communication function according to any one of claims 1 to 4, characterized in that: Also includes: The secondary side metering coil (6) is wound on the magnetic core (3) and is located on the same side as the secondary side power supply coil (5).

6. The single-phase electromagnetic voltage transformer integrating carrier communication function according to claim 5, characterized in that: The primary coil of the isolation transformer is grounded.

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