Column-mounted circuit breaker integrating communication, electricity taking and traveling wave distance measurement

Abstract

The invention belongs to the technical field of pole-mounted circuit breakers in power systems, and particularly relates to a pole-mounted circuit breaker integrating communication, electricity taking and traveling wave distance measurement. The solid-sealed polar pole is located on the box body, an integrated capacitor C1 is arranged in the solid-sealed polar pole, and the wire inlet side of the integrated capacitor C1 is a high-voltage terminal; a secondary side circuit is arranged in the box body, a self-integrated capacitor C1 is sequentially connected in series with low-voltage capacitors C2 and C3 of a capacitor electricity-taking power supply and a high-frequency transformer T2, and a power-frequency electricity-taking transformer T1 is connected in parallel with the C2 and C3; the protection circuit is connected to the C3 in parallel; the high-frequency transformer T2 has two groups of output windings, one group of output windings is connected in series with the traveling wave acquisition circuit, and the other group of output windings is connected in series with the carrier communication circuit. Original four independent devices are integrated into one device, functions are deeply integrated, the limitation that in a traditional scheme, a plurality of devices achieve a single function is broken through, high integration of the devices is achieved, the number of the devices and the installation space are reduced, and the installation and maintenance cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of pole-mounted circuit breakers in power systems, and in particular relates to a pole-mounted circuit breaker integrating communication, power extraction and traveling wave ranging. Background Art

[0002] Ordinary pole-mounted circuit breakers mainly include electromagnetic combination and electronic combination. In the electromagnetic combination, the measurement / protection / zero-sequence current transformer is based on the electromagnetic principle and is built-in and cast inside the pole-mounted circuit breaker; the zero-sequence voltage transformer is based on the electronic principle and is built-in and cast inside the pole-mounted circuit breaker; the power supply and line measurement voltage transformers need to be separately installed externally. This circuit breaker combination is large in size and heavy in weight, and the installation and maintenance are also more complicated; in the electronic combination, the measurement / protection / zero-sequence current transformer is based on the electronic principle and is built-in and cast inside the pole-mounted circuit breaker; the voltage transformer adopts the electronic principle and is built-in and cast inside the pole-mounted circuit breaker; the power supply adopts a separate external voltage transformer, and this mode has further integrated the voltage transformer; so far, the basic functions of the circuit breaker have been initially integrated, but the power is still drawn from an external separate voltage transformer. How to provide the controller with power voltage based on the built-in power supply sensor module of the pole-mounted circuit breaker body through a new design of self-power supply has become an optimization direction.

[0003] In addition, with the continuous development of intelligent distribution network, data collection, monitoring, automatic control and even further feeder automation FA of the entire distribution network need communication to be realized. Currently, medium-voltage carrier communication, which is one of the mainstream distribution network communication methods, requires a separate 10kV coupling device to realize the secondary signal to the primary side of the network. However, it also faces new problems such as increased cost, increased installation and maintenance due to separate installation and configuration of coupling equipment. Moreover, from the perspective of integration, the built-in medium-voltage carrier communication coupler device of the pole-mounted circuit breaker body will play a key role in the development of intelligent distribution network. Therefore, how to use the built-in medium-voltage carrier communication coupler device of the pole-mounted circuit breaker body as an integrated device to replace the traditional separately installed coupling device needs to be solved urgently.

[0004] In the current distribution network application, due to the complex topology of the distribution network and the complex line load conditions, when a line fails, it is difficult to locate the fault point in time, which may lead to major grid safety and economic security. Being able to detect line faults in time will help make distribution network fault handling more efficient; currently conventional fault ranging equipment is mainly single-body ranging equipment, which needs to be deployed and applied separately for fault ranging, and is not economical enough. How to replace traditional single equipment with a traveling wave ranging sensor built into the pole-mounted circuit breaker body will provide strong support for the development of smart grids in terms of economy and intelligence.

[0005] Based on this, how to design a pole-mounted circuit breaker that integrates medium-voltage carrier communication coupling equipment, power supply and traveling wave ranging sensor is an important issue in the current intelligent distribution network. Summary of the invention

[0006] In order to solve the problems existing in the prior art, the present invention provides a pole-mounted circuit breaker integrating communication, power supply and traveling wave ranging.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: a pole-mounted circuit breaker integrating communication, power supply and traveling wave ranging, comprising: a sealed pole and a box body, the sealed pole is located on the box body, the sealed pole has a built-in integrated capacitor C1, and the incoming line side of the integrated capacitor C1 is a high-voltage terminal; the box body has a built-in secondary side circuit, and the capacitor power supply low-voltage capacitors C2, C3 and a high-frequency transformer T2 are connected in series in sequence from the integrated capacitor C1, the industrial frequency power supply transformer T1 is connected in parallel to C2 and C3, and the secondary side of T1 is converted into a DC power supply through a rectifier bridge D1 and a filter capacitor C4, and outputs VCC+ and VCC- power supply signals; the protection circuit is connected in parallel to C3; the high-frequency transformer T2 has two groups of output windings, one group of output windings is connected in series with a traveling wave acquisition circuit, and the other group of output windings is connected in series with a carrier communication circuit.

[0008] Furthermore, the box body has a built-in secondary circuit board, the secondary side circuit is arranged on the secondary circuit board, the input end of the secondary side circuit is connected to the output end of the sealed pole, and the output end of the secondary side circuit is connected to the aviation plug terminal.

[0009] Furthermore, a switching pull rod, a spring operating mechanism, an energy storage pull rod and an aviation plug terminal are arranged inside the box; the switching pull rod realizes the opening and closing of the circuit breaker on site by pulling the pull rod; the spring operating mechanism realizes the main functions of the circuit breaker such as energy storage, opening and closing through mechanical operation; the energy storage pull rod can store energy for the spring operating mechanism; the aviation plug terminal is connected to the distribution terminal controller through the aviation plug line.

[0010] Furthermore, a vacuum arc extinguishing chamber is built into the sealed pole, and an incoming terminal is provided on the vacuum arc extinguishing chamber. The incoming terminal is connected in series with the high-voltage fuse on the incoming side through the first conductive rod, and the high-voltage fuse is connected in series with the integrated high-voltage capacitor and the voltage sampling capacitor through the second conductive rod and the fourth conductive rod. The integrated sensor is located in the middle of the integrated high-voltage capacitor, and the third conductive rod is connected in series with the high-voltage fuse on the outgoing side.

[0011] Furthermore, the integrated high-voltage capacitor is a high-voltage capacitor for capacitor power supply, carrier coupling and voltage traveling wave collection. The capacitance range is 3000pF-8000pF, and the capacitor can be a ceramic capacitor or a film capacitor.

[0012] Furthermore, a shielding cover is installed on the integrated high-voltage capacitor and the voltage sampling capacitor.

[0013] Furthermore, the integrated sensor includes a current sampling sensor and a current traveling wave sensor.

[0014] Furthermore, the sealed pole is covered with an umbrella skirt, and the umbrella skirt is epoxy casting-molded or externally provided with a silicone sleeve.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By integrating the medium-voltage carrier communication coupler, capacitor power supply and traveling wave ranging sensor into the traditional electronic pole-mounted circuit breaker, the basic functions are realized while adding communication, power supply and ranging functions, breaking the limitation of multiple devices realizing a single function in the traditional solution.

[0017] 2. The use of electronic voltage and current sensors improves sampling accuracy and response speed;

[0018] 3. The capacitor power supply continuously supplies power to the distribution terminal controller during the operation of the equipment, replacing the traditional external separate voltage transformer power supply method, optimizing the overall structure of the set, and improving the convenience of operation and maintenance installation and the consistency of the primary and secondary life cycles;

[0019] 4. The built-in medium-voltage carrier communication coupler replaces the traditional separately installed coupling equipment, providing more powerful intelligent support for the distribution automation system, enabling the distribution network to achieve more efficient remote monitoring, management and fault diagnosis and processing, improving the reliability and stability of the power grid operation, playing a key role in the development of the intelligent distribution network, and also reducing costs and installation and maintenance workload;

[0020] 5. Built-in traveling wave ranging sensor replaces traditional single equipment, improves the timeliness and accuracy of fault location, and provides strong support for the development of smart grid in terms of economy and intelligence;

[0021] 6. The integrated design solves the problems of multiple interfaces, complex installation and maintenance in traditional multi-device solutions, reduces the installation workload and time, and improves the installation efficiency. In terms of maintenance, the maintenance of a single device is more convenient, reducing the maintenance cost and difficulty.

[0022] In summary, the original four independent devices are integrated into one device with deep functional integration, which breaks the limitation of multiple devices realizing single functions separately in traditional solutions, realizes high integration of equipment, reduces the number of devices and installation space, and reduces installation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the center column mounted circuit breaker of the present invention;

[0024] Figure 2 for Figure 1 Diagram of the internal structure of the circuit breaker on the center column;

[0025] Figure 3 It is a schematic diagram of the internal structure of the sealed pole;

[0026] Figure 4 Schematic diagram of the internal structure of the box;

[0027] Figure 5 It is the design diagram of a single sealed pole and secondary circuit;

[0028] Figure 6 It is the multifunctional operation and state transition diagram of the power grid operation process.

[0029] In the figure:

[0030] 1. Umbrella skirt, 2. Sealed pole, 3. Vacuum interrupter, 4. Integrated high-voltage capacitor, 5. Integrated sensor, 6. Voltage sampling capacitor, 7. High-voltage fuse, 8. Box, 9. Secondary circuit, 10. Incoming terminal, 11. First conductive rod, 12. Second conductive rod, 13. First shielding cover, 14. Third conductive rod, 15. Second shielding cover, 16. Fourth conductive rod, 17. Opening and closing pull rod, 18. Spring operating mechanism, 19. Energy storage mark, 20. Energy storage pull rod, 21. Opening and closing mark, 22. Secondary circuit board, 23. Aviation plug terminal. DETAILED DESCRIPTION

[0031] 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.

[0032] A pole-mounted circuit breaker integrating communication, power supply and traveling wave ranging, comprising: a sealed pole 2 and a box 8, wherein the sealed pole 2 is located on the box 8, and the sealed pole 2 has an integrated capacitor C1 built in, and the incoming line side of the integrated capacitor C1 is a high-voltage terminal; the box 8 has a built-in secondary side circuit 9, and the integrated capacitor C1 is connected in series with capacitor power supply low-voltage capacitors C2, C3 and a high-frequency transformer T2 in sequence, and the industrial frequency power supply transformer T1 is connected in parallel to C2 and C3, and the secondary side of T1 is converted into a DC power supply through a rectifier bridge D1 and a filter capacitor C4, and outputs VCC+ and VCC- power supply signals; the protection circuit is connected in parallel to C3; the high-frequency transformer T2 has two groups of output windings, one group of output windings is connected in series with a traveling wave acquisition circuit, and the other group of output windings is connected in series with a carrier communication circuit.

[0033] In one embodiment, the box body 8 has a built-in secondary circuit board 22 , the secondary side circuit 9 is arranged on the secondary circuit board 22 , the input end of the secondary side circuit 9 is connected to the output end of the sealed pole 2 , and the output end of the secondary side circuit 9 is connected to the aviation plug terminal 23 .

[0034] In one embodiment, a switch-on and switch-off pull rod 17, a spring operating mechanism 18, an energy storage pull rod 20 and an aviation plug terminal 23 are arranged inside the box body 8; the switch-on and switch-off pull rod 17 realizes the opening and closing of the circuit breaker on site by pulling the pull rod; the spring operating mechanism 18 realizes the main functions of the circuit breaker such as energy storage, opening and closing through mechanical operation; the energy storage pull rod 20 can store energy for the spring operating mechanism 18; the aviation plug terminal 23 is connected to the distribution terminal controller through an aviation plug line.

[0035] In one embodiment, the sealed pole 2 has a built-in vacuum arc chamber 3, and an incoming terminal 10 is provided on the vacuum arc chamber 3. The incoming terminal 10 is connected in series with the high-voltage fuse 7 on the incoming side through the first conductive rod 11. The high-voltage fuse 7 is connected in series with the integrated high-voltage capacitor 4 and the voltage sampling capacitor 6 through the second conductive rod 12 and the fourth conductive rod 16. The integrated sensor 5 is located in the middle of the integrated high-voltage capacitor 4, and the third conductive rod 14 is connected in series with the high-voltage fuse 7 on the outgoing side.

[0036] In one embodiment, the integrated high-voltage capacitor 4 is a high-voltage capacitor for capacitor power supply, carrier coupling and voltage traveling wave collection, and the capacitance range is 3000pF-8000pF. The capacitor can be a ceramic capacitor or a film capacitor.

[0037] In one embodiment, a shielding cover is installed on the integrated high-voltage capacitor 4 and the voltage sampling capacitor 6 .

[0038] In one embodiment, the integrated sensor 5 includes a current sampling sensor and a current traveling wave sensor.

[0039] In one embodiment, the sealed pole 2 is covered with an shed 1, and the shed 1 is epoxy casting or an external silicone sleeve. The shed 1 is used to increase external insulation.

[0040] Example 1: Combination Figure 1 and Figure 5Understand that a pole-mounted circuit breaker that integrates communication, power supply and traveling wave ranging, a sealed pole 2 is arranged on the box 8, and the internal design and structure of the three-phase sealed pole 2 are consistent; the sealed pole 2 has a built-in integrated capacitor C1, and the incoming line side of the integrated capacitor C1 is a high-voltage terminal, and the integrated capacitor C1 provides power supply, carrier communication coupling, and traveling wave acquisition coupler functions; the box 8 has a built-in secondary side circuit 9, and the capacitor power supply low-voltage capacitors C2, C3 and high-frequency transformer T2 are connected in series in sequence from the integrated capacitor C1. Through the combination of C1, C2, and C3, the 50Hz industrial frequency power supply transformer T1 is connected in parallel to C2 and C3, and power is drawn from C2 and C3, and output to the secondary side of the T1 transformer. The secondary side of T1 is converted into a DC power supply through the rectifier bridge D1 and the filter capacitor C4. , output VCC+, VCC- power supply signals; the protection circuit is connected to C3 in parallel, collects the power circuit signal, when the 10kV line fails and generates a high fault voltage, the protection circuit works by collecting the voltage on the C3 capacitor, cuts off the power circuit of T1, D1 and C4 circuits, and thus protects the power circuit; the 100kHz-30MHz high-frequency transformer T2 output winding has two groups, T2-2 and T2-3, T2-2 winding is connected in series with the traveling wave collection circuit, T2-3 winding is connected in series with the carrier communication circuit, high-frequency carrier signal and high-frequency traveling wave signal flow through T2 through C1, C2 and C3, and output to the traveling wave collection circuit at T2-2 winding, collects the voltage traveling wave signal, and outputs to the carrier communication circuit at T2-3 winding, realizing medium-voltage carrier communication. The relevant electrical connections of the three sealed poles 2 are realized in the above circuit, and finally output to the distribution terminal controller, realizing electronic voltage signal collection, electronic current signal collection, medium-voltage carrier communication, voltage traveling wave signal collection and current traveling wave signal collection.

[0041] Example 2: Based on Example 1, Figure 4It is understood that the box body 8 is provided with a secondary side circuit 9, a switch-on / off pull rod 17, a spring operating mechanism 18, an energy storage pull rod 20 and an aviation plug terminal 23, which are integrally deployed in the center of the box body 8; the secondary side circuit 9 includes a carrier communication secondary circuit, a capacitor power supply voltage secondary circuit, a traveling wave sampling, and a voltage and current sampling secondary circuit. The overall circuit is deployed at the bottom of the box body to reduce the requirements for insulation and box body size; the switch-on / off pull rod 17 realizes the opening and closing of the circuit breaker on the spot by pulling the pull rod; the spring operating mechanism 18 is connected to the vacuum arc chamber 3 through the insulating pull rod. When receiving a command from the operating pull rod or the distribution terminal, the spring operating mechanism 18 is mechanically Mechanical operation realizes the main functions of the circuit breaker such as energy storage, opening and closing; the energy storage pull rod 20 can realize the energy storage of the local circuit breaker spring operating mechanism 18 by pulling the pull rod; the aviation plug terminal 23 is connected to the distribution terminal controller through the aviation plug line, and the interior includes: telemetry signal, remote control signal, power supply, traveling wave sampling signal and carrier signal. The size and number of pins of the aviation plug terminal are not specifically defined and can be adjusted according to actual conditions; the box body 8 has a built-in secondary circuit board 22, and the secondary side circuit 9 is arranged on the secondary circuit board 22. The input end of the secondary side circuit 9 is connected to the output end of the sealed pole 2, and the output end of the secondary side circuit 9 is connected to the aviation plug terminal 23.

[0042] Telemetry signals such as electronic phase sequence voltage, electronic zero sequence voltage, electronic phase sequence current, electronic zero sequence current signal and common terminal; remote control signals such as open position, closed position, no energy storage and common terminal; power supply such as power supply signal on the incoming line side and power supply signal on the outgoing line side; traveling wave sampling signals such as voltage traveling wave sampling signal and current traveling wave sampling signal; carrier signals such as carrier generation signal, carrier receiving signal, carrier power supply and carrier ground signal.

[0043] The box body 8 is also provided with an energy storage mark 19 and an opening and closing mark 21. The energy storage mark 19 is used to indicate the energy storage status inside the circuit breaker body. When the energy storage is completed, it corresponds to energy storage, and when the energy storage is not completed, it corresponds to no energy storage; the opening and closing mark 21 is used to indicate the opening or closing status. As the circuit breaker is opened and closed, the indicator mark will jump to the corresponding flag position.

[0044] Embodiment 3: Based on Embodiment 2, Figure 2-3It is understood that the sealed pole 2 has a built-in vacuum arc chamber 3, and the vacuum arc chamber 3 can be integrally cast inside the sealed pole 2. The vacuum arc chamber 3 is provided with an incoming terminal 10, which connects the sealed pole 2 with the 10kV high voltage to achieve electrical connection. The incoming terminal 10 is connected in series with the high-voltage fuse 7 on the incoming side through the first conductive rod 11, and the high-voltage fuse 7 is connected in series with the integrated high-voltage capacitor 4 and the voltage sampling capacitor 6 through the second conductive rod 12 and the fourth conductive rod 16. The integrated high-voltage capacitor 4 and the voltage sampling capacitor 6 achieve high-voltage access, the integrated sensor 5 is located in the middle of the integrated high-voltage capacitor 4, and the third conductive rod 14 is connected in series with the high-voltage fuse 7 on the outgoing side.

[0045] The integrated high-voltage capacitor 4 is a high-voltage capacitor for capacitor power supply, carrier coupling and voltage traveling wave collection. The two sides are the incoming line power supply capacitors. The left and right positions and the incoming and outgoing line positions can be interchanged. The capacitance value can be set and changed from 3000pF to 8000pF, depending on the demand for different power supply. The capacitor can choose ceramic capacitors or film capacitors. Figure 5 Indicated as C1. The voltage sampling capacitor 6 is a voltage sampling high-voltage capacitor, with the two sides being the incoming line power taking capacitors. The left and right positions are interchangeable with the incoming and outgoing line positions. The capacitor can be a ceramic capacitor or a film capacitor. The first shielding cover 13 and the second shielding cover 15 are installed on the relative inner sides of the integrated high-voltage capacitor 4 and the voltage sampling capacitor 6, respectively, to achieve uniform distribution of high voltage on the capacitor surface, effectively solving the problem of complex internal electric field unevenness, resulting in unqualified withstand voltage and partial discharge.

[0046] The integrated sensor 5 includes a current sampling sensor and a current traveling wave sensor, wherein the current sampling sensor is an industrial frequency sensor that can collect the phase sequence current and zero sequence current of the industrial frequency; the current traveling wave sensor is a high-frequency Rogowski coil sensor that can transmit a high-frequency current traveling wave of 100kHz-1MHz.

[0047] The high-voltage fuse 7 is connected in series between the incoming line, the outgoing line and the capacitors on both sides. When the high-voltage capacitor fails due to an abnormal short circuit, the high-voltage fuse 7 blows quickly to protect the normal operation of the power grid.

[0048] The sealed pole 2 is covered with an shed 1, which is used to increase external insulation. The entire pole can be cast with outdoor epoxy or with an indoor epoxy casting body and an external silicone sleeve shed.

[0049] Working process description: refer to Figure 5A single sealed pole and a secondary circuit design diagram are understood, and the relevant electrical connections of the three sealed poles 2 are realized on the secondary circuit wiring diagram, and output to the aviation plug terminal 23, and then connected to the distribution terminal controller to realize electronic voltage signal acquisition, electronic current signal acquisition, medium voltage carrier communication, voltage traveling wave signal acquisition, and current traveling wave signal acquisition. It mainly includes: high-frequency carrier signal and high-frequency traveling wave signal flow through T2 through C1, C2 and C3, 50Hz industrial frequency power transformer T1 is connected to C2 and C3 in parallel, power is taken from C2 and C3, and output to the secondary side of T1 transformer, T1 secondary side is converted into DC power through rectifier bridge D1 and filter capacitor C4, and VCC+ and VCC- power supply signals are output; the protection circuit is connected to C3 in parallel to collect power circuit signals, when the 10kV line fails and a high fault voltage is generated, the protection circuit works by collecting the voltage on the C3 capacitor, and the power circuits of T1, D1 and C4 are cut off, thereby protecting the power circuit; the 100kHz-30MHz high-frequency transformer T2 outputs to the traveling wave collection circuit at the T2-2 winding to collect voltage traveling wave signals; the T2-3 winding outputs to the carrier communication circuit to realize medium-voltage carrier communication.

[0050] After the installation of a pole-mounted circuit breaker integrating communication, power supply and traveling wave ranging, as the power grid is running, the operating status of each functional module of the single-phase sequence is as follows: Figure 6 As shown. Figure 6 In the test, the first to fourth power frequency cycles are normal cycles, the high-voltage side works normally, the fifth cycle is a fault cycle, the non-fault phase, and the voltage increases; combined with the power grid working cycle, the functional states are as follows: after the equipment is installed and powered on, the phase sequence voltage sampling signal is collected in the first four cycles, which is consistent with the high-voltage side, and is an electronic voltage small signal, and the phase is consistent with the high-voltage side; after the equipment is installed and powered on, the phase sequence current sampling signal is collected in the first four cycles, which is consistent with the high-voltage side, and is an electronic current small signal, and the phase is consistent with the high-voltage side; after the equipment is installed and powered on, the power-taking signal output by the power-taking function normally outputs a DC voltage power supply signal within the normal power frequency working cycle. When the line fails, During the fault cycle, the power frequency voltage increases and reaches the threshold of the protection circuit. The protection circuit works, and the power-taking circuit is protected and prohibited from working. At this time, there is no output, and the power supply voltage signal is reduced to zero output; after the equipment is installed and powered on, the carrier communication signal starts to work normally, outputting carrier sending signals and receiving carrier receiving signals. The line carrier communication is normal during the normal power frequency cycle and the fault cycle, and the line fault does not affect the carrier communication status; after the equipment is installed and powered on, the traveling wave acquisition signal has no signal output under normal conditions. When a line fault occurs, the line generates a traveling wave signal, and the traveling wave acquisition circuit outputs a signal, which is transmitted to the traveling wave ranging device through the aerial plug, and the traveling wave signal is analyzed for positioning.

[0051] In summary, after the installation is completed, the pole-mounted circuit breaker can perform real-time electronic voltage signal sampling, electronic current signal collection, power supply extraction, carrier signal transmission, and traveling wave signal collection according to the operation status of the high-voltage side line, and transmit the output signal to the distribution terminal controller device and the traveling wave ranging device.

[0052] 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 pole-mounted circuit breaker integrating communication, power supply and traveling wave ranging, comprising: A sealed pole and a box body, wherein the sealed pole is located on the box body, and is characterized in that the sealed pole has a built-in integrated capacitor C1, and the incoming line side of the integrated capacitor C1 is a high-voltage terminal; the box body has a built-in secondary side circuit, and the low-voltage capacitors C2, C3 and the high-frequency transformer T2 are connected in series in sequence from the integrated capacitor C1 to take power from the capacitor, and the industrial frequency power transformer T1 is connected in parallel to C2 and C3, and the secondary side of T1 is converted into a DC power supply through a rectifier bridge D1 and a filter capacitor C4, and outputs VCC+ and VCC- power supply signals; the protection circuit is connected in parallel to C3; the high-frequency transformer T2 has two groups of output windings, one group of output windings is connected in series to a traveling wave acquisition circuit, and the other group of output windings is connected in series to a carrier communication circuit.

2. The pole-mounted circuit breaker integrating communication, power supply and traveling wave ranging according to claim 1 is characterized in that: The box body has a built-in secondary circuit board, the secondary side circuit is arranged on the secondary circuit board, the input end of the secondary side circuit is connected to the output end of the sealed pole, and the output end of the secondary side circuit is connected to the aviation plug terminal.

3. The pole-mounted circuit breaker integrating communication, power supply and traveling wave ranging according to claim 2 is characterized in that: The box body is equipped with an opening and closing pull rod, a spring operating mechanism, an energy storage pull rod and an aviation plug terminal; the opening and closing pull rod realizes the opening and closing of the circuit breaker on site by pulling the pull rod; the spring operating mechanism realizes the main functions of the circuit breaker such as energy storage, opening and closing through mechanical operation; the energy storage pull rod can store energy for the spring operating mechanism; the aviation plug terminal is connected to the distribution terminal controller through the aviation plug line.

4. The pole-mounted circuit breaker integrating communication, power supply and traveling wave ranging according to any one of claims 1 to 3, characterized in that: The sealed pole has a built-in vacuum arc extinguishing chamber, on which an incoming terminal is provided. The incoming terminal is connected in series with the high-voltage fuse on the incoming side through the first conductive rod. The high-voltage fuse is connected in series with the integrated high-voltage capacitor and the voltage sampling capacitor through the second conductive rod and the fourth conductive rod. The integrated sensor is located in the middle of the integrated high-voltage capacitor. The third conductive rod is connected in series with the high-voltage fuse on the outgoing side.

5. The pole-mounted circuit breaker integrating communication, power supply and traveling wave ranging according to claim 4 is characterized in that: The integrated high-voltage capacitor is a high-voltage capacitor for capacitor power supply, carrier coupling and voltage traveling wave collection. The capacitance range is 3000pF-8000pF. The capacitor can be a ceramic capacitor or a film capacitor.

6. The pole-mounted circuit breaker integrating communication, power supply and traveling wave ranging according to claim 5 is characterized in that: A shielding cover is installed on the integrated high-voltage capacitor and the voltage sampling capacitor.

7. The pole-mounted circuit breaker integrating communication, power supply and traveling wave ranging according to claim 6 is characterized in that: The integrated sensor includes a current sampling sensor and a current traveling wave sensor.

8. The pole-mounted circuit breaker integrating communication, power supply and traveling wave ranging according to claim 7 is characterized in that: The solid-sealed pole is covered with an shed, which is epoxy-cast or externally covered with a silicone sleeve.

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