CN205692680U - A kind of low-power consumption distribution transformer - Google Patents

Abstract

nullThe utility model discloses a kind of low-power consumption distribution transformer，Including insulation fuel tank、Transformer body，Transformer body is arranged in insulation fuel tank，Iron core it is provided with inside transformer body，Primary coil and secondary coil it is wound with on iron core，It is respectively provided on two sides with grid side electric wire connecting junction and user side electric wire connecting junction at transformer body，It is provided with rosette controller in insulation fuel tank upper end，User side electric wire connecting junction is provided with voltage transformer、Current transformer and capacitive compensator，Grid side electric wire connecting junction and user side electric wire connecting junction connect rosette controller respectively，This utility model structural principle is simple，Intelligence degree is high，It is capable of automatically compensating electric capacity to regulate user side power，Save electric energy，Also set up automatic cut-off protection in rosette controller simultaneously and protect module，Be prevented from distribution transformer because of after power-off open time instantaneous high current and burn out.

Description

A low-power distribution transformer

technical field

The utility model relates to the technical field of transformers, in particular to a low-power distribution transformer.

Background technique

A transformer is an important passive component in electronic engineering that steps up or down voltage. It has been more than a century since the development of transformers. For power transformers, in most cases, the voltage level of electric energy from the power station to the user needs to go through at least a level 5 transformer before it can be transmitted to low-voltage electrical equipment. Although the efficiency of the transformer itself is very high, due to its large number and large capacity, the total loss is still very large. In addition, when the existing transformer encounters a sudden power failure, it is easy to burn out due to excessive instantaneous current, which affects the power supply. power distribution.

Utility model content

The purpose of this utility model is to provide a low-power distribution transformer to solve the problems raised in the above-mentioned background technology.

In order to achieve the above purpose, the utility model provides the following technical solutions: a low-power distribution transformer, including an insulating oil tank and a transformer body, the transformer body is set in the insulating oil tank, and an iron core is provided inside the transformer body, so A primary coil and a secondary coil are wound on the iron core, a grid-side connector and a user-side connector are respectively provided on both sides of the transformer body, and a junction box controller is provided at the upper end of the insulating oil tank. The user-side connector is provided with a voltage transformer, a current transformer and a capacitance compensator, and the grid-side connector and the user-side connector are respectively connected to a junction box controller, and the junction box controller is provided with a single-chip microcomputer, a load detection module, a power-off self-protection module, and the single-chip microcomputer is respectively connected to a load detection module, a power-off self-protection module, a voltage transformer, a current transformer and a capacitor compensator.

Preferably, the power-off self-protection module includes a switch, a triode, a field effect transistor, a triac and a bidirectional thyristor, the bases of the triode are respectively connected to the cathode of the diode B and one end of the resistor D, and the collectors are respectively connected to the field effect The gate of the transistor is connected to one end of the resistor B, the emitter of the triode is respectively connected to the source of the field effect transistor and the other end of the resistor D, the drain of the field effect transistor is connected to the cathode of the diode C and one end of the capacitor B, and the other end of the capacitor B is respectively Connect one end of the bidirectional trigger diode and one end of the resistor E, the other end of the resistor E is connected to one end of the bidirectional thyristor, the other end of the bidirectional thyristor is respectively connected to the other end of the bidirectional trigger diode and the emitter of the triode, and the anode of the diode C Respectively connect one end of the resistor A and the positive pole of the diode B, the other end of the resistor A is connected to one end of the switch, the other end of the switch is connected to the positive pole of the diode A, the negative pole of the diode A is connected in series with the resistor B and the capacitor A, and the two ends of the capacitor A are connected in parallel Resistor C.

Preferably, the capacitance compensator includes a capacitor bank, a knife switch, a circuit breaker and a thermal relay, one end of the knife switch is connected to the power supply terminal, the other end is connected to one end of the current transformer, and the other end of the current transformer is connected to the circuit breaker and the thermal relay in turn. , the thermal relay is connected to the capacitor bank.

Preferably, a heat dissipation device is also provided on the insulating oil tank.

Compared with the prior art, the beneficial effects of the utility model are:

(1) The structure principle of the utility model is simple, and the degree of intelligence is high. The capacitance compensator adopted can realize automatic compensation of capacitance to adjust the power of the user side, saving electric energy.

(2) The junction box controller of the utility model is also equipped with a power-off self-protection module, which can prevent the distribution transformer from burning out due to the instantaneous high current when it is turned on after power-off, avoiding the waste of energy and the occurrence of safety accidents.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Fig. 2 is the control principle block diagram of the utility model;

Fig. 3 is the schematic diagram of the power-off self-protection module of the present invention;

Fig. 4 is a schematic diagram of the capacitance compensator of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Figure 1, the utility model provides a technical solution: a low-power distribution transformer, including an insulating oil tank 1 and a transformer body 2, the transformer body 2 is arranged in the insulating oil tank 1, and the insulating oil tank 1 is also equipped with There is a heat sink 24, and the inside of the transformer body 2 is provided with an iron core 3, on which the primary coil 4 and the secondary coil 5 are wound, and on both sides of the transformer body 2, grid-side wiring 6 and user-side connector 7, a junction box controller 8 is provided at the upper end of the insulating oil tank 1, and a voltage transformer 9, a current transformer 10 and a capacitance compensator 11 are provided on the user-side connector 7, so The grid-side connector 6 and the user-side connector 7 are respectively connected to the junction box controller 8, and the junction box controller 8 is provided with a single-chip microcomputer 12, a load detection module 13, and a power-off self-protection module 14, and the single-chip microcomputer 12 is respectively Connect the load detection module 13 , the power-off self-protection module 14 , the voltage transformer 9 , the current transformer 10 and the capacitor compensator 11 .

In this embodiment, the power-off self-protection module 14 includes a switch 15, a triode 16, a field effect transistor 17, a triac 18 and a triac 19, and the base of the triode 16 is respectively connected to the cathode of the diode B2b and one end of the resistor D4a. The collectors are respectively connected to the gate of the field effect transistor 17 and one end of the resistor B 2a, the emitter of the triode 16 is respectively connected to the source of the field effect transistor 17 and the other end of the resistor D 4a, and the drain of the field effect transistor 17 is respectively connected to the cathode of the diode C 3b and the capacitor B One end of 2c, the other end of capacitor B 2c are respectively connected to one end of bidirectional trigger diode 18 and one end of resistor E 5a, the other end of resistor E 5a is connected to one end of bidirectional thyristor tube 19, and the other end of bidirectional thyristor tube 19 is connected to the other end of bidirectional trigger diode 18 respectively One end is connected to the emitter of the transistor 16, the anode of the diode C3b is respectively connected to one end of the resistor A1a and the anode of the diode B2b, the other end of the resistor A1a is connected to one end of the switch 15, the other end of the switch 15 is connected to the anode of the diode A1b, and the cathode of the diode A1b is connected in series to the resistor B 2a, capacitor A 1c, resistor C 3a connected in parallel at both ends of capacitor A 1c, the junction box controller of the present invention is also equipped with a power-off self-protection module, which can prevent the distribution transformer from burning due to the instantaneous high current when the power is turned on Bad, avoiding the waste of energy and the occurrence of safety accidents.

In this embodiment, the capacitor compensator 11 includes a capacitor bank 20, a knife switch 21, a circuit breaker 22, and a thermal relay 23. One end of the knife switch 21 is connected to the power supply terminal, and the other end is connected to one end of the current transformer 10, and the current transformer 10 is connected to the other end. One end is sequentially connected to a circuit breaker 22 and a thermal relay 23 , and the thermal relay 23 is connected to the capacitor group 20 . The utility model has the advantages of simple structure and principle, high degree of intelligence, and the adopted capacitance compensator can realize automatic compensation of capacitance to adjust the user side power, thus saving electric energy.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and spirit of the present invention , replacements and modifications, the scope of the present utility model is defined by the appended claims and their equivalents.

Claims (4)

1. a low-power consumption distribution transformer, including insulation fuel tank and transformer body, it is characterised in that: described transformer body It is arranged in insulation fuel tank, is provided with iron core inside described transformer body, described iron core is wound with primary coil and secondary wire Circle, is respectively provided on two sides with grid side electric wire connecting junction and user side electric wire connecting junction, on described insulation fuel tank at described transformer body End is provided with rosette controller, and described user side electric wire connecting junction is provided with voltage transformer, current transformer and capacitive compensator, Described grid side electric wire connecting junction and user side electric wire connecting junction connect rosette controller respectively, are provided with monolithic in described rosette controller Machine, load detecting module, automatic cut-off protection protect module, described single-chip microcomputer connects load detecting module respectively, automatic cut-off protection protects module, Voltage transformer, current transformer and capacitive compensator.

A kind of low-power consumption distribution transformer the most according to claim 1, it is characterised in that: described automatic cut-off protection protects module bag Including switch, audion, field-effect transistor, bidirectional trigger diode and bidirectional triode thyristor pipe, described transistor base connects respectively Connecing diode B negative pole and resistance D one end, colelctor electrode connects field effect transistor gate and resistance B one end, described audion respectively Emitter stage connects field-effect transistor source electrode and the resistance D other end respectively, and the drain electrode of described field-effect transistor connects two poles respectively Pipe C negative pole and electric capacity B one end, the described electric capacity B other end connects bidirectional trigger diode one end and resistance E one end respectively, described The resistance E other end connects bidirectional triode thyristor pipe one end, and the described bidirectional triode thyristor pipe other end connects bidirectional trigger diode respectively The other end and transistor emitter, described diode C positive pole connects resistance A one end and diode B positive pole, described resistance A respectively Other end connecting valve one end, the described switch other end connects diode A positive pole, and described diode A negative pole is connected in series resistance B, electric capacity A, described electric capacity A two ends parallel resistance C.

A kind of low-power consumption distribution transformer the most according to claim 1, it is characterised in that: described capacitive compensator includes Capacitance group, knife-like switch, chopper and thermorelay, described knife-like switch one end connects power end, and the other end connects Current Mutual Inductance Device one end, the current transformer other end is sequentially connected with chopper, thermorelay, and described thermorelay is connected with capacitance group.

A kind of low-power consumption distribution transformer the most according to claim 1, it is characterised in that: it is additionally provided with on described insulation fuel tank Heat abstractor.