CN115632561A - Carrier machine power-taking circuit with medium-voltage carrier coupler function - Google Patents

Carrier machine power-taking circuit with medium-voltage carrier coupler function Download PDF

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Publication number
CN115632561A
CN115632561A CN202211380182.0A CN202211380182A CN115632561A CN 115632561 A CN115632561 A CN 115632561A CN 202211380182 A CN202211380182 A CN 202211380182A CN 115632561 A CN115632561 A CN 115632561A
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China
Prior art keywords
diode
voltage
carrier
rectifier bridge
bridge circuit
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Application number
CN202211380182.0A
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Chinese (zh)
Inventor
徐剑英
曾令斌
郭相泉
任奎源
高庆欢
梁东旭
李宇轩
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Qingdao Topscomm Communication Co Ltd
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Qingdao Topscomm Communication Co Ltd
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Priority to CN202211380182.0A priority Critical patent/CN115632561A/en
Publication of CN115632561A publication Critical patent/CN115632561A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/10—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers
    • H02M5/12—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers for conversion of voltage or current amplitude only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/1216—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for AC-AC converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/06—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • H02M7/068—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode mounted on a transformer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/548—Systems for transmission via power distribution lines the power on the line being DC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/56—Circuits for coupling, blocking, or by-passing of signals

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

The invention discloses a carrier machine electricity taking circuit with a medium-voltage carrier coupler function, which relates to the field of communication.

Description

Carrier machine power-taking circuit with medium-voltage carrier coupler function
Technical Field
The invention relates to the field of communication, in particular to a carrier machine power-taking circuit with a medium-voltage carrier coupler function.
Background
The medium-voltage carrier communication technology can effectively solve the problems of weak communication signals, unstable signals, no signals and optical fiber breakpoints in remote mountainous areas, can realize the full coverage of a wired communication private network, and is widely applied to the fields of distribution automation and power utilization information acquisition.
The medium-voltage carrier communication carrier machine is matched with a medium-voltage carrier communication coupler to realize medium-voltage carrier communication, but the medium-voltage carrier communication machine needs to be additionally and independently wired to get electricity, generally, the medium-voltage carrier communication machine can only be directly connected to a power distribution station concentrator or a power supply terminal of a power distribution terminal in parallel, and the electricity getting mode is extremely irregular; in addition, with the automatic construction of power distribution, the power taking capacity of a product capacitor is not enough to support the normal work of the medium-voltage carrier communication carrier machine when a product is mainly developed into a secondary deep fusion product in part of provinces of a national power grid at present, an electromagnetic voltage transformer needs to be independently installed to supply power to the medium-voltage carrier communication carrier machine, the investment is large, and the electromagnetic voltage transformer has ferromagnetic resonance risk.
Therefore, the technical problem to be solved by the technical staff in the field is how to invent and transform the medium-voltage carrier communication coupler on the basis of the functions of the medium-voltage carrier communication coupler, and solve the problems of nonstandard power taking and difficult power taking in the field practical application of the medium-voltage carrier communication coupler.
Disclosure of Invention
In order to solve the above technical problem, an object of the present invention is to provide a power-taking circuit for a carrier machine with a medium-voltage carrier coupler function, comprising: the device comprises a capacitance voltage division module, a failure protection module and a carrier communication coupling isolation module; the input end of the failure protection module is connected with the high-voltage end, the output end of the failure protection module is connected with the capacitance voltage division module, the capacitance voltage division module is connected with the carrier communication coupling isolation module, and the carrier communication coupling isolation module is connected with the carrier machine and the grounding end; the capacitance voltage division module comprises: the first end of the first capacitor is the input end of a capacitor voltage division module and is connected with the output end of the failure protection module, the second end of the first capacitor is connected with the first end of the second capacitor, and the second end of the second capacitor is the output end of the capacitor voltage division module and is connected with the input end of the carrier communication coupling isolation module;
further comprising: a power taking module; the power taking module is connected with the output end and the grounding end of the capacitance voltage division module;
the power taking module comprises a first transformer, a first gas discharge tube, a second gas discharge tube, a transient overvoltage protection circuit, a rectifier bridge circuit and a first diode;
the first end of the primary side of the first transformer is connected with the second end of the first capacitor, the second end of the primary side of the first transformer is connected with the grounding end, the first end of the secondary side of the first transformer is connected with the first input end of the rectifier bridge circuit, and the second end of the secondary side of the first transformer is connected with the second input end of the rectifier bridge circuit; the first gas discharge tube is connected in parallel between the primary sides of the first transformers; the second gas discharge tube is connected in parallel between the secondary sides of the first transformer; the transient overvoltage protection circuit is connected in parallel between the secondary sides of the first transformer; the first end of the first diode is connected with the first output end of the rectifier bridge circuit, and the second end of the first diode is connected with the second output end of the rectifier bridge circuit.
Preferably, in the above carrier machine power-taking circuit with the function of the medium-voltage carrier coupler, the failure protection module includes: a first fuse;
the first end of the first fuse is connected with the high-voltage end, and the second end of the first fuse is an output end of the failure protection module and is connected with an input end of the capacitance voltage division module.
Preferably, in the above carrier machine power-taking circuit with the function of the medium-voltage carrier coupler, the carrier communication coupling and isolation module includes: a second transformer, a third gas discharge tube, a fourth gas discharge tube;
the first end of the primary side of the second transformer is connected with the output end of the capacitance voltage division module, the second end of the primary side of the second transformer is connected with the grounding end, the secondary side of the second transformer is connected with the carrier, the third gas discharge tube is connected between the primary sides of the second transformer in parallel, and the fourth gas discharge tube is connected between the secondary sides of the second transformer in parallel.
Preferably, in the above power-taking circuit for a carrier machine with a function of a medium-voltage carrier coupler, the transient overvoltage protection circuit includes: the first resistor, the second resistor, the third capacitor, the fourth capacitor, the first silicon controlled rectifier, the second diode, the third diode, the fourth diode and the fifth diode; the anode of the first silicon controlled rectifier is connected with the second input end of the rectifier bridge circuit, the cathode of the first silicon controlled rectifier is connected with the first input end of the rectifier bridge circuit, and the control electrode of the first silicon controlled rectifier is connected with the second end of the first resistor, the second end of the third capacitor and the anode of the second diode; the first end of the first resistor is connected with the first input end of the rectifier bridge circuit; the first end of the third capacitor is connected with the first input end of the rectifier bridge circuit; the cathode of the second diode is connected with the cathode of the third diode; the anode of the third diode is connected with the second input end of the rectifier bridge circuit; the anode of the second silicon controlled rectifier is connected with the first input end of the rectifier bridge circuit, the cathode of the second silicon controlled rectifier is connected with the second input end of the rectifier bridge circuit, and the control electrode of the second silicon controlled rectifier is connected with the second end of the second resistor, the second end of the fourth capacitor and the anode of the fifth diode; the first end of the second resistor is connected with the second input end of the rectifier bridge circuit; the first end of the fourth capacitor is connected with the second input end of the rectifier bridge circuit; the cathode of the fifth diode is connected with the cathode of the fourth diode; and the anode of the fourth diode is connected with the first input end of the rectifier bridge circuit.
Preferably, in the carrier machine power taking circuit with the function of the medium-voltage carrier coupler, the rectifier bridge circuit includes: a sixth diode, a seventh diode, an eighth diode, and a ninth diode;
the sixth diode, the seventh diode, the eighth diode and the first diode are connected end to form a rectifier bridge circuit, a first input end of the rectifier bridge circuit is arranged between the cathode of the sixth diode and the anode of the seventh diode, a second input end of the rectifier bridge circuit is arranged between the cathode of the eighth diode and the anode of the ninth diode, a first output end of the rectifier bridge circuit is arranged between the cathode of the seventh diode and the cathode of the ninth diode, a second output end of the rectifier bridge circuit is arranged between the anode of the sixth diode and the anode of the eighth diode, and the output end of the rectifier bridge circuit is connected with the carrier machine.
Preferably, in the above carrier machine power-taking circuit with a function of a medium-voltage carrier coupler, the first capacitor is a high-voltage ceramic capacitor.
Preferably, in the carrier machine power-taking circuit with the function of the medium-voltage carrier coupler, the first diode is a unidirectional TVS tube.
Preferably, in the above power circuit for a carrier machine with a function of a medium-voltage carrier coupler, the first transformer is a high-voltage industrial-frequency transformer.
Preferably, in the above carrier machine power-taking circuit having the function of the medium-voltage carrier coupler, the first fuse is a high-voltage current-limiting fuse.
Preferably, in the above power circuit for a carrier machine with a function of a medium-voltage carrier coupler, the second transformer is a high-frequency transformer.
Preferably, in the above carrier machine power-taking circuit with the function of the medium-voltage carrier coupler, the first thyristor and the second thyristor are unidirectional thyristors.
Preferably, in the above carrier machine power-taking circuit with the function of the medium-voltage carrier coupler, the second diode, the third diode, the fourth diode and the fifth diode are voltage-stabilizing diodes.
The carrier machine power-taking circuit with the medium-voltage carrier coupler function can realize the medium-voltage carrier communication capacitive coupler function, simultaneously takes power from a medium-voltage distribution circuit to the medium-voltage carrier communication carrier machine through a capacitive voltage division principle, solves the problems of nonstandard power taking and difficult power taking in field practical application of the medium-voltage carrier communication carrier machine, and can adjust the power taking capability without increasing the attenuation of medium-voltage carrier signals by adjusting the capacitance of the first capacitor and the second capacitor and the primary inductance of the first transformer.
Drawings
In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a circuit diagram of a carrier power supply circuit with a function of a medium-voltage carrier communication coupler according to the present invention;
fig. 2 is a schematic diagram of a carrier power-taking circuit with a function of a medium-voltage carrier communication coupler according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
The core of the invention is to provide a carrier machine power-taking circuit with the function of a medium-voltage carrier communication coupler.
In order that those skilled in the art will better understand the disclosure, reference will now be made in detail to the embodiments of the disclosure as illustrated in the accompanying drawings.
Power line carrier communication is a communication method for realizing data transmission using a power line as a transmission channel, and can be divided into a high voltage carrier (35 kV or more), a medium voltage carrier (10 kV), and a low voltage carrier (380/220V) according to the level of transmission line voltage. The medium-voltage carrier communication is a communication mode which utilizes 10kV medium-voltage distribution lines as a transmission channel, is mainly applied to the fields of distribution automation and power consumption information acquisition, uses the existing and perfect distribution lines as the transmission channel, does not need a wired private network communication mode of repeated line investment, and has the advantages of less investment, simple equipment, easy construction, convenient maintenance and management, synchronization with power grid construction, quick opening along with new construction, consistent coverage and an electric power system and the like. And the power distribution station concentrator or the power distribution terminal realizes data interaction with the main station through the medium-voltage communication carrier. The medium voltage carrier communication machine can not bear 10kV high voltage, so that the medium voltage carrier communication machine can be connected to a medium voltage overhead line through a special medium voltage carrier communication coupler. Because the medium-voltage carrier communication machine needs to be additionally and independently wired to get electricity, the medium-voltage carrier communication machine can only be directly connected to a power distribution station concentrator or a power supply terminal of a power distribution terminal in parallel, the electricity getting mode is extremely irregular, and with the automatic construction of power distribution, a secondary deep fusion product is mainly pushed in a province of a national power grid at present, the electricity getting capacity of a product capacitor is not enough to support the medium-voltage carrier communication machine to normally work, an electromagnetic voltage transformer needs to be independently installed to supply power for the medium-voltage carrier communication machine, the investment is large, and the ferromagnetic resonance risk exists in the electromagnetic voltage transformer.
In order to solve the above technical problem, the present invention provides a carrier power-taking circuit with a medium-voltage carrier communication coupler function, fig. 1 is a circuit diagram of the carrier power-taking circuit with the medium-voltage carrier communication coupler function provided by the present invention, and fig. 2 is a schematic diagram of the carrier power-taking circuit with the medium-voltage carrier communication coupler function provided by the present invention, as shown in fig. 1 and fig. 2, the carrier power-taking circuit includes a capacitance voltage-dividing module 11: the first end of the first capacitor C1 is an input end of a capacitor voltage division module 11 and is connected with an output end of a failure protection module 12, the second end of the first capacitor C1 is connected with a first end of a second capacitor C2, and the second end of the second capacitor C2 is an output end of the capacitor voltage division module 11 and is connected with an input end of a carrier communication coupling isolation module 13; the input end of the failure protection module 12 is connected with a high-voltage end, the output end of the failure protection module 12 is connected with the output end of the capacitance voltage division module 11, the output end of the capacitance voltage division module 11 is connected with the input end of the carrier communication coupling isolation module 13, and the output end of the carrier communication coupling isolation module 13 is connected with the carrier machine 15 and a grounding end; further comprising: a power taking module 14; the power taking module 14 is connected with the output end and the grounding end of the capacitance voltage dividing module 11;
the power taking module 14 comprises a first transformer T1, a first gas discharge tube G1, a second gas discharge tube G2, a transient overvoltage protection circuit, a rectifier bridge circuit and a first diode D1;
the first end of the primary side of the first transformer T1 is connected with the second end of the first capacitor C1, the second end of the primary side of the first transformer T1 is connected with the grounding end, the first end of the secondary side of the first transformer T1 is connected with the first input end of the rectifier bridge circuit, and the second end of the secondary side of the first transformer T1 is connected with the second input end of the rectifier bridge circuit; the first gas discharge tube G1 is connected in parallel between the primary sides of the first transformers T1; the second gas discharge tube G2 is connected in parallel between the secondary sides of the first transformer T1; the transient overvoltage protection circuit is connected in parallel between the secondary sides of the first transformer T1; the first end of the first diode D1 is connected with the first output end of the rectifier bridge circuit, and the second end of the first diode D1 is connected with the second output end of the rectifier bridge circuit.
In this embodiment, the power-taking capability can be adjusted by adjusting the capacitance of the first capacitor C1, the capacitance of the second capacitor C2, and the primary inductance of the first transformer T1, without increasing the attenuation of the ballast wave signal; the first gas discharge tube G1, the second gas discharge tube G2 and the first diode D1 are used for overvoltage transient protection.
Preferably, in the carrier machine power-taking circuit with the function of the medium-voltage carrier coupler, the failure protection module 12 includes: a first fuse F1;
the first end of the first fuse F1 is connected with the high-voltage end, and the second end of the first fuse F1 is an output end of the failure protection module 12 and is connected with an input end of the capacitance voltage division module 11.
In this embodiment, the first fuse F1 is used for failure protection, and is rapidly blown out after a critical device of the circuit fails, thereby preventing persistent failures.
Preferably, in the above power circuit with a carrier machine having a function of a medium-voltage carrier coupler, the carrier communication coupling and isolating module 13 includes: a second transformer T2, a third gas discharge tube G3 and a fourth gas discharge tube G4;
the first end of the primary side of a second transformer T2 is connected with the output end of the capacitive voltage division module 11, the second end of the primary side of the second transformer T2 is connected with the grounding end, the secondary side of the second transformer T2 is connected with the carrier 15, a third gas discharge tube G3 is connected in parallel between the primary sides of the second transformer T2, and a fourth gas discharge tube G4 is connected in parallel between the secondary sides of the second transformer T2.
In this embodiment, the second transformer T2 is used for coupling and isolating the medium-voltage carrier signal; the third gas discharge tube G3 and the fourth gas discharge tube G4 are used for overvoltage transient protection.
Preferably, in the carrier machine power taking circuit with the function of the medium-voltage carrier coupler, the rectifier bridge circuit includes: a sixth diode D6, a seventh diode D7, an eighth diode D8, and a ninth diode D9;
a sixth diode D6, a seventh diode D7, an eighth diode D8, and a ninth diode D9 are connected end to form a rectifier bridge circuit, a first input terminal of the rectifier bridge circuit is arranged between a cathode of the sixth diode D6 and an anode of the seventh diode D7, a second input terminal of the rectifier bridge circuit is arranged between a cathode of the eighth diode D8 and an anode of the ninth diode D9, a first output terminal of the rectifier bridge circuit is arranged between a cathode of the seventh diode D7 and a cathode of the ninth diode D9, a second output terminal of the rectifier bridge circuit is arranged between an anode of the sixth diode D6 and an anode of the eighth diode D8, and the output terminal of the rectifier bridge circuit is connected with the carrier 15.
In this embodiment, the rectifier bridge circuit converts ac power to dc power to supply power to the carrier 15.
Preferably, in the above power-taking circuit for a carrier machine with a function of a medium-voltage carrier coupler, the transient overvoltage protection circuit includes: the circuit comprises a first resistor R1, a second resistor R2, a third capacitor C3, a fourth capacitor C4, a first controllable silicon S1, a second controllable silicon S2, a second diode D2, a third diode D3, a fourth diode D4 and a fifth diode D5; the anode of the first controlled silicon S1 is connected with the second input end of the rectifier bridge circuit, the cathode of the first controlled silicon S1 is connected with the first input end of the rectifier bridge circuit, and the control electrode of the first controlled silicon S1 is connected with the second end of the first resistor R1, the second end of the third capacitor C3 and the anode of the second diode D2; the first end of the first resistor R1 is connected with the first input end of the rectifier bridge circuit; the first end of the third capacitor C3 is connected with the first input end of the rectifier bridge circuit; the cathode of the second diode D2 is connected with the cathode of the third diode D3; the anode of the third diode D3 is connected with the second input end of the rectifier bridge circuit; the anode of the second controllable silicon S2 is connected with the first input end of the rectifier bridge circuit, the cathode of the second controllable silicon S2 is connected with the second input end of the rectifier bridge circuit, and the control electrode of the second controllable silicon S2 is connected with the second end of the second resistor R2, the second end of the fourth capacitor C4 and the anode of the fifth diode D5; the first end of the second resistor R2 is connected with the second input end of the rectifier bridge circuit; the first end of the fourth capacitor C4 is connected with the second input end of the rectifier bridge circuit; the cathode of the fifth diode D5 is connected with the cathode of the fourth diode D4; the anode of the fourth diode D4 is connected to the first input terminal of the rectifier bridge circuit.
In this embodiment, the transient overvoltage protection circuit is used for transient overvoltage protection to prevent the electronic components in the power module 14 from being damaged by continuous overvoltage. When the positive half-cycle overvoltage occurs, the fifth diode D5 is broken down in the reverse direction, the second silicon controlled rectifier S2 short-circuits the secondary side of the first transformer T1, and the primary side voltage division of the first transformer T1 is reduced; when the overvoltage is in a negative half cycle, the second diode D2 is in reverse breakdown, the first thyristor S1 short-circuits the secondary side of the first transformer T1, the primary side voltage division of the first transformer T1 is reduced, the third diode D3 and the fourth diode D4 prevent reverse voltage, the third capacitor C3 and the fourth capacitor C4 prevent pulse misoperation, and the first resistor R1 and the second resistor R2 divide voltage to provide control electrode voltage of the first thyristor S1 and the second thyristor S2.
Preferably, the first capacitor C1 is a high voltage ceramic capacitor.
A high-voltage ceramic capacitor is made up through extruding high-dielectric-constant ceramic (barium titanate-titanium oxide) to become tube, disk or disk, high-temp sintering to form electrode, coating metal film (silver), coating steel lead with tinned copper, and coating protecting enamel or epoxy resin. The high-voltage ceramic capacitor has the advantages of high voltage resistance, low loss, good frequency characteristic, high stability, special series structure, suitability for long-term working reliability of a high-voltage pole, high current climbing rate, suitability for a large-current loop non-inductive structure, large insulation resistance, long service time and the like.
Preferably, the first diode D1 is a unidirectional TVS tube.
Under the specified reverse application condition, when the TVS tube bears a high-energy transient overvoltage pulse, the working impedance of the TVS tube can be immediately reduced to a very low conduction value, a large current is allowed to pass through, and the voltage is clamped to a preset level, so that precision components in an electronic circuit are effectively protected from being damaged. Unidirectional TVS tubes are typically used for dc circuits.
Preferably, the first transformer T1 is a high-voltage industrial frequency transformer.
Compared with the traditional 380V input power frequency transformer, the high-voltage power frequency transformer has the advantages that the rated voltage can be 1200V, the vacuum epoxy encapsulation is adopted, the high-temperature aging resistance and the electric strength are high, the high-quality silicon steel sheet is adopted, the temperature rise is low, and the efficiency is high.
Preferably, the first fuse F1 is a high voltage current limiting fuse.
The high-voltage current-limiting fuse can be instantly switched on and off in a mode of limiting the current of a line, so that the overload overcurrent voltage can be timely blocked, the protection effect is effectively achieved, and the continuous ground fault of the medium-voltage line is prevented from being caused. The high-voltage fuse has the advantages of aging resistance, small power loss, low temperature rise, high breaking capacity, high current limiting and low switching voltage.
Preferably, the second transformer T2 is a high frequency transformer.
The high-frequency transformer adopts a manganese-zinc ferrite magnetic core, the highest working frequency can reach 2MHz, the magnetic core is annular, and a high-insulation-level winding adopts a double-wire parallel winding mode, so that the isolation and voltage resistance can be ensured, the leakage inductance can be reduced, the loss of carrier communication signals is low, and the network feeding efficiency is improved.
Preferably, the first thyristor S1 and the second thyristor S2 are unidirectional thyristors.
The unidirectional thyristor is a controllable rectifying electronic element, which can be turned from off to on under the action of an external control signal, but once the unidirectional thyristor is turned on, the unidirectional thyristor cannot be turned off by the external signal, and can only be turned off by removing a load or reducing the voltage at two ends of the unidirectional thyristor. Has the advantages of small volume, light weight, high efficiency, long service life, convenient control and the like.
Preferably, the second diode D2, the third diode D3, the fourth diode D4, and the fifth diode D5 are zener diodes.
A zener diode, also called a zener diode. The diode with voltage stabilizing function is manufactured by utilizing the phenomenon that the current of the PN junction can change in a large range and the voltage is basically unchanged in the reverse breakdown state of the PN junction.
The above detailed description describes the power-taking circuit of the carrier machine with the function of the medium-voltage carrier communication coupler provided by the invention. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed in the embodiment corresponds to the method disclosed in the embodiment, so that the description is simple, and the relevant points can be referred to the description of the method part. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

Claims (12)

1. A carrier machine power-taking circuit with a medium-voltage carrier coupler function comprises: the device comprises a capacitance voltage division module (11), a failure protection module (12) and a carrier communication coupling isolation module (13); the capacitive voltage division module (11) comprises: the first end of the first capacitor is the input end of the capacitor voltage division module (11) and is connected with the output end of the failure protection module (12), the second end of the first capacitor is connected with the first end of the second capacitor, and the second end of the second capacitor is the output end of the capacitor voltage division module (11) and is connected with the input end of the carrier communication coupling isolation module (13);
it is characterized by also comprising: the power taking module (14), the power taking module (14) is connected with the output end and the grounding end of the capacitance voltage dividing module (11);
the electricity taking module (14) comprises a first transformer, a first gas discharge tube, a second gas discharge tube, a transient overvoltage protection circuit, a rectifier bridge circuit and a first diode;
the first end of the primary side of the first transformer is connected with the second end of the first capacitor, the second end of the primary side of the first transformer is connected with a grounding end, the first end of the secondary side of the first transformer is connected with the first input end of the rectifier bridge circuit, and the second end of the secondary side of the first transformer is connected with the second input end of the rectifier bridge circuit; the first gas discharge tube is connected in parallel between the primary sides of the first transformers; the second gas discharge tube is connected in parallel between the secondary sides of the first transformer; the transient overvoltage protection circuit is connected in parallel between the secondary sides of the first transformer; the first end of the first diode is connected with the first output end of the rectifier bridge circuit, and the second end of the first diode is connected with the second output end of the rectifier bridge circuit.
2. A carrier machine power-taking circuit with medium voltage carrier coupler functionality according to claim 1, characterized in that the failure protection module (12) comprises: a first fuse;
the first end of the first fuse is connected with the high-voltage end, the second end of the first fuse is an output end of the failure protection module (12) and is connected with an input end of the capacitance voltage division module (11).
3. The carrier machine power-taking circuit with the function of the medium-voltage carrier coupler as recited in claim 1, wherein the carrier communication coupling isolation module (13) comprises: a second transformer, a third gas discharge tube, a fourth gas discharge tube;
the first end of the primary side of the second transformer is connected with the output end of the capacitance voltage division module (11), the second end of the primary side of the second transformer is connected with the grounding end, the secondary side of the second transformer is connected with the carrier (15), the third gas discharge tube is connected in parallel between the primary sides of the second transformer, and the fourth gas discharge tube is connected in parallel between the secondary sides of the second transformer.
4. The carrier power-taking circuit with the function of the medium-voltage carrier coupler as recited in claim 1, wherein the over-voltage transient protection circuit comprises: the first resistor, the second resistor, the third capacitor, the fourth capacitor, the first silicon controlled rectifier, the second diode, the third diode, the fourth diode and the fifth diode; the anode of the first controllable silicon is connected with the second input end of the rectifier bridge circuit, the cathode of the first controllable silicon is connected with the first input end of the rectifier bridge circuit, and the control electrode of the first controllable silicon is connected with the second end of the first resistor, the second end of the third capacitor and the anode of the second diode; the first end of the first resistor is connected with the first input end of the rectifier bridge circuit; the first end of the third capacitor is connected with the first input end of the rectifier bridge circuit; the cathode of the second diode is connected with the cathode of the third diode; the anode of the third diode is connected with the second input end of the rectifier bridge circuit; the anode of the second controllable silicon is connected with the first input end of the rectifier bridge circuit, the cathode of the second controllable silicon is connected with the second input end of the rectifier bridge circuit, and the control electrode of the second controllable silicon is connected with the second end of the second resistor, the second end of the fourth capacitor and the anode of the fifth diode; the first end of the second resistor is connected with the second input end of the rectifier bridge circuit; the first end of the fourth capacitor is connected with the second input end of the rectifier bridge circuit; the cathode of the fifth diode is connected with the cathode of the fourth diode; and the anode of the fourth diode is connected with the first input end of the rectifier bridge circuit.
5. The carrier motor power-taking circuit with the function of the medium-voltage carrier coupler as recited in claim 1, wherein the rectifier bridge circuit comprises: a sixth diode, a seventh diode, an eighth diode, and a ninth diode;
the rectifier bridge circuit is formed by connecting the sixth diode, the seventh diode, the eighth diode and the ninth diode end to end, a first input end of the rectifier bridge circuit is arranged between the cathode of the sixth diode and the anode of the seventh diode, a second input end of the rectifier bridge circuit is arranged between the cathode of the eighth diode and the anode of the ninth diode, a first output end of the rectifier bridge circuit is arranged between the cathode of the seventh diode and the cathode of the ninth diode, a second output end of the rectifier bridge circuit is arranged between the anode of the sixth diode and the anode of the eighth diode, and the output end of the rectifier bridge circuit is connected with the carrier machine (15).
6. The carrier machine power-taking circuit with the function of the medium-voltage carrier coupler as claimed in claim 1, wherein the first capacitor is a high-voltage ceramic capacitor.
7. The carrier machine power-taking circuit with the function of the medium-voltage carrier coupler as recited in claim 1, wherein the first diode is a unidirectional TVS tube.
8. The carrier machine power-taking circuit with the function of the medium-voltage carrier coupler as claimed in claim 1, wherein the first transformer is a high-voltage industrial frequency transformer.
9. The carrier machine power-taking circuit with the function of the medium-voltage carrier coupler as recited in claim 2, wherein the first fuse is a high-voltage current-limiting fuse.
10. The carrier machine power-taking circuit with the function of the medium-voltage carrier coupler as recited in claim 3, wherein the second transformer is a high-frequency transformer.
11. The carrier machine power-taking circuit with the medium-voltage carrier coupler function as claimed in claim 4, wherein the first silicon controlled rectifier and the second silicon controlled rectifier are unidirectional silicon controlled rectifiers.
12. The carrier motor power-taking circuit with the function of the medium-voltage carrier coupler as recited in claim 4, wherein the second diode, the third diode, the fourth diode and the fifth diode are voltage-regulator diodes.
CN202211380182.0A 2022-11-05 2022-11-05 Carrier machine power-taking circuit with medium-voltage carrier coupler function Pending CN115632561A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211380182.0A CN115632561A (en) 2022-11-05 2022-11-05 Carrier machine power-taking circuit with medium-voltage carrier coupler function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211380182.0A CN115632561A (en) 2022-11-05 2022-11-05 Carrier machine power-taking circuit with medium-voltage carrier coupler function

Publications (1)

Publication Number Publication Date
CN115632561A true CN115632561A (en) 2023-01-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
CN (1) CN115632561A (en)

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