CN218300925U - Dry-type transformer control circuit - Google Patents
Dry-type transformer control circuit Download PDFInfo
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- CN218300925U CN218300925U CN202221993228.1U CN202221993228U CN218300925U CN 218300925 U CN218300925 U CN 218300925U CN 202221993228 U CN202221993228 U CN 202221993228U CN 218300925 U CN218300925 U CN 218300925U
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- intermediate relay
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- type transformer
- alternating current
- temperature controller
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- 239000000523 sample Substances 0.000 claims abstract description 20
- 230000006698 induction Effects 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 abstract description 7
- 238000004804 winding Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
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Abstract
The application relates to the technical field of electric power, and discloses a dry-type transformer control circuit, includes: the temperature controller is arranged on the shell of the dry-type transformer and is provided with a probe; the alternating current control loop is electrically connected with the temperature controller; and the direct current control loop is electrically connected with the alternating current control loop. The large-area power failure accident caused by breakdown and discharge of the temperature probe of the temperature controller is avoided; the high-voltage alternating current is prevented from entering the direct current system when the temperature probe arranged on the high-voltage side of the dry-type transformer is in short circuit and ground fault, so that the safe and stable operation of the power system is ensured, and the power supply reliability of the power system is improved.
Description
Technical Field
The present application relates to the field of power technology, for example, to a dry-type transformer control loop.
Background
The transformer has the defects of overhigh oil temperature, overhigh winding temperature, overlow oil level, overhigh pressure in an oil tank, gas generation and cooling system faults, and a device which can act on signals or act on tripping operation is required to be arranged. The ordinary high-voltage transformer all has set up the super high temperature protection function, and the vast majority is acted on the tripping operation, has still generally configured the high temperature alarm function. However, the temperature detecting probe of the temperature controller in the prior art has a relatively outstanding defect, and when the temperature detecting probe of the temperature controller is installed on the high-voltage side of the dry-type transformer, once the insulation breakdown discharge of the three-phase winding of the dry-type transformer to the temperature probe occurs, the temperature probe of the transformer is led to enter the alternating-current voltage, and the temperature controller has a direct-current power supply, so that the safety accident is caused.
SUMMERY OF THE UTILITY MODEL
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended to be a prelude to the more detailed description that is presented later.
The embodiment of the present disclosure provides a dry type transformer control circuit, including:
the temperature controller is arranged on the shell of the dry-type transformer and is provided with a probe;
the alternating current control loop is electrically connected with the temperature controller;
and the direct current control loop is electrically connected with the alternating current control loop.
Further, the alternating current control loop comprises an alternating current power supply anode, one end of the power supply anode is connected with one end of a control switch, the other end of the control switch is connected with one end of a temperature controller tripping contact, the other end of the temperature controller tripping contact is connected with one end of an intermediate relay, the other end of the intermediate relay is connected with one end of the control switch, and the other end of the control switch is connected with an alternating current power supply cathode.
Further, the dc control loop includes a dc input end, and the dc input end is connected to one end of the control switch; one end of the control switch is connected with one end of a tripping module of the circuit breaker, and the other end of the control switch is connected with one end of an intermediate relay module; the other ends of the breaker tripping module and the intermediate relay module are respectively connected with one end of a control switch, and the other end of the control switch is connected with a direct current output end.
Furthermore, the intermediate relay module comprises a normally open contact of the intermediate relay, and the normally open contact of the intermediate relay is connected with the intermediate relay II.
Furthermore, the breaker tripping module comprises an intermediate relay normally-open contact, and the intermediate relay normally-open contact is connected with a breaker tripping coil.
Furthermore, the temperature controller tripping contact is used for receiving a temperature controller tripping signal.
Furthermore, after the probe of the temperature controller senses the temperature rise of the transformer, a tripping signal of the temperature controller is transmitted to the tripping contact of the temperature controller, the first intermediate relay is started, the first intermediate relay generates an induction magnetic field, and the switch of the normally open contact of the first intermediate relay is attracted.
And further, after the normally open contact of the intermediate relay is closed, a tripping coil of the circuit breaker is started, and the circuit breaker trips.
Further, the positive pole and the negative pole of the alternating current power supply are arranged in the dry-type transformer.
The dry-type transformer control circuit provided by the embodiment of the disclosure can realize the following technical effects:
the large-area power failure accident caused by breakdown and discharge of the temperature probe of the temperature controller is avoided; the high-voltage alternating current is prevented from entering the direct current system when the temperature probe arranged on the high-voltage side of the dry-type transformer is in short circuit and ground fault, so that the safe and stable operation of the power system is ensured, and the power supply reliability of the power system is improved.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
fig. 1 is a schematic structural diagram of a dry type transformer control loop provided in an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of an ac control loop provided in an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a dc control loop provided in the embodiment of the present disclosure.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
Referring to fig. 1, an embodiment of the present disclosure provides a dry type transformer control loop, including:
the temperature controller is arranged on the shell of the dry-type transformer and is provided with a probe;
the alternating current control loop is electrically connected with the temperature controller;
and the direct current control loop is electrically connected with the alternating current control loop.
In some embodiments of the utility model, the alternating current control loop includes the anodal AC + of alternating current power supply, the anodal AC + one end of power is connected with control switch QF2 one end, the control switch QF2 other end is connected with temperature controller trip contact 1 one end, the 1 other end of temperature controller trip contact is connected with an auxiliary relay KM1 one end, the one KM1 other end of auxiliary relay is connected with control switch QF2 one end, the control switch QF2 other end is connected with alternating current power supply negative pole AC-.
In some embodiments of the present invention, the DC control loop comprises a DC input DC +, which is connected to one end of a control switch QF 1; one end of the control switch QF1 is connected with one end of a breaker tripping module, and the other end of the control switch QF1 is connected with one end of an intermediate relay module; the other ends of the breaker tripping module and the intermediate relay module are respectively connected with one end of a control switch QF1, and the other end of the control switch QF1 is connected with a direct current output end DC-.
The utility model discloses an in some embodiments, the intermediate relay module includes intermediate relay one and normally opens contact 2, intermediate relay one normally opens contact 2 and is connected with intermediate relay two KA1.
The utility model discloses an in some embodiments, circuit breaker tripping operation module includes two normally open contacts 3 of auxiliary relay, two normally open contacts 3 of auxiliary relay are connected with circuit breaker tripping operation coil TQ.
In some embodiments of the present invention, the temperature controller trip contact 1 is used to receive a temperature controller trip signal.
The utility model discloses an in some embodiments, feel the temperature rise back of transformer when the probe of temperature controller, pass temperature controller tripping signal and give temperature controller tripping contact 1 starts intermediate relay KM1, and intermediate relay KM1 produces induction magnetic field, with the switch actuation of an intermediate relay normally open contact 2. And after the switch of the normally open contact 2 of the first intermediate relay is closed, the second intermediate relay is started, and the normally open contact 3 of the second intermediate relay is closed.
In some embodiments of the utility model, work as after the three normally open contacts 3 of auxiliary relay are closed, start circuit breaker tripping operation coil TQ, the circuit breaker tripping operation.
In some embodiments of the present invention, the AC power positive AC + and the AC power negative AC-are installed in a dry type transformer.
In order to avoid the situation that high-voltage alternating current flows into a direct current system when insulation breakdown discharge occurs to a temperature probe by a dry type transformer winding, an alternating current intermediate relay is additionally arranged on an ultra-high temperature protection tripping contact leading-out loop, and an outlet contact of the alternating current intermediate relay is connected into a tripping loop of a circuit breaker to act on tripping of the dry type transformer. As shown in fig. 1-3, the working principle of a dry-type transformer control loop in the present invention is: the control switch is a normally closed switch, and when the temperature of the dry-type transformer is within a threshold value, the switches of the trip contact of the temperature controller, the normally open contact of the first intermediate relay and the normally open contact of the second intermediate relay are in a normally open state. When the temperature of the dry type transformer is sensed by the probe in the temperature controller, the trip signal of the temperature controller is transmitted to the alternating current control loop, the trip contact of the temperature controller receives the trip signal of the temperature controller, the switch of the trip signal is closed, the first intermediate relay is started, the first intermediate relay generates a magnetic field, the first intermediate relay in the direct current control loop normally opens the switch of the contact, the second intermediate relay is started, the second intermediate relay generates a magnetic field, the second intermediate relay normally opens the contact, the trip coil of the circuit breaker is started, the circuit breaker is caused to trip, and the circuit is protected from being burnt. In the process, after the ultrahigh-temperature tripping output contact is closed, the alternating-current intermediate relay KM1 is started, the normally open contact KM1 at the outlet of the relay is closed, a tripping loop of the dry-type transformer is connected, and the automatic opening function of the breaker after the ultrahigh-temperature protection action is realized. If high-voltage alternating current is mixed into the breakdown temperature controller circuit again, the alternating current intermediate relay can be burnt out, the probability that the relay outlet normally open contact KM1 is closed or the short circuit is closed due to the action of the alternating current intermediate relay is greatly reduced, the reliability of the action of the ultra-high temperature protection of the dry-type transformer is effectively improved, and the condition that the accident is enlarged due to the fact that the high-voltage alternating current is mixed into a direct current system is basically avoided. The dry type transformer is provided with overload protection alarm, high temperature alarm and ultrahigh temperature tripping function. Setting the dry-type transformer protection device according to power specifications or manuals: high temperature: the winding temperature is 130 ℃, and 1S alarm is delayed; ultra-high temperature: the winding temperature was 150 ℃,0S tripped. The implementation of the technology can prevent the high-voltage alternating current from entering the direct current system when the dry type transformer winding generates insulation breakdown discharge on the temperature probe, thereby ensuring the safe and stable operation of the power system and improving the power supply reliability of the power system.
In fig. 2 and 3, (1) TQ is a circuit breaker trip coil, which acts on the circuit breaker trip;
(2) The DC is a direct current power supply, the AC is an alternating current power supply, and alternating current and direct current control power supplies are respectively provided;
(3) The KA1 is an intermediate relay II, and a tripping loop of the on-off circuit breaker is connected through a normally open contact after electrification;
(4) KM1 is an intermediate relay I, and is communicated with a KA1 loop through a normally open contact after being electrified;
(5) And the tripping contact of the transformer temperature controller receives a tripping signal of the temperature controller.
Through the utility model discloses reached: the large-area power failure accident caused by breakdown and discharge of the temperature probe of the temperature controller is avoided; the high-voltage alternating current is prevented from entering the direct current system when the temperature probe arranged on the high-voltage side of the dry-type transformer is in short circuit and ground fault, so that the safe and stable operation of the power system is ensured, and the power supply reliability of the power system is improved.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (8)
1. A dry-type transformer control circuit, comprising:
the temperature controller is arranged on the shell of the dry-type transformer and is provided with a probe;
the alternating current control loop is electrically connected with the temperature controller;
the direct current control loop is electrically connected with the alternating current control loop;
the alternating current control circuit comprises an alternating current power supply anode, one end of the power supply anode is connected with one end of a control switch, the other end of the control switch is connected with one end of a temperature controller tripping contact (1), the other end of the temperature controller tripping contact (1) is connected with one end of an intermediate relay, the other end of the intermediate relay is connected with one end of the control switch, and the other end of the control switch is connected with an alternating current power supply cathode.
2. A dry-type transformer control loop as claimed in claim 1, wherein said dc control loop comprises a dc input terminal, said dc input terminal is connected to one end of a control switch; one end of the control switch is connected with one end of a tripping module of the circuit breaker, and the other end of the control switch is connected with one end of an intermediate relay module; the other ends of the breaker tripping module and the intermediate relay module are respectively connected with one end of a control switch, and the other end of the control switch is connected with a direct current output end.
3. A dry transformer control circuit as claimed in claim 2, characterized in that the intermediate relay module comprises an intermediate relay one normally open contact (2), and the intermediate relay two is connected to the intermediate relay one normally open contact (2).
4. A dry transformer control circuit as claimed in claim 3, characterized in that the breaker trip module comprises a second intermediate relay normally open contact (3), the third intermediate relay normally open contact (3) being connected to a breaker trip coil.
5. A dry-type transformer control loop according to claim 1, characterized in that the thermostat trip contact (1) is adapted to receive a thermostat trip signal.
6. A dry-type transformer control loop as claimed in claim 5, characterized in that when the probe of thermostat senses the temperature rise of transformer, it transmits the trip signal of thermostat to the trip contact (1) of thermostat, and starts the first intermediate relay, which generates the induction magnetic field to close the switch of the normally open contact (2) of the intermediate relay.
7. A dry-type transformer control circuit according to claim 4, characterized in that, when the second normally open contact (3) of the intermediate relay is closed, the circuit breaker tripping coil is started and the circuit breaker is tripped.
8. A dry-type transformer control circuit as claimed in claim 1, wherein said ac power positive electrode and ac power negative electrode are installed in the dry-type transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221993228.1U CN218300925U (en) | 2022-07-29 | 2022-07-29 | Dry-type transformer control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221993228.1U CN218300925U (en) | 2022-07-29 | 2022-07-29 | Dry-type transformer control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218300925U true CN218300925U (en) | 2023-01-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221993228.1U Active CN218300925U (en) | 2022-07-29 | 2022-07-29 | Dry-type transformer control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218300925U (en) |
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2022
- 2022-07-29 CN CN202221993228.1U patent/CN218300925U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231008 Address after: 615099 Xichang Vanadium and Titanium Industrial Park, Liangshan Yi Autonomous Prefecture, Sichuan Province Patentee after: XICHANG STEEL VANADIUM CO.,LTD., PANGANG Group Patentee after: PANGANG GROUP PANZHIHUA STEEL & VANADIUM Co.,Ltd. Address before: 615032 Xichang Industrial Park, Liangshan Yi Autonomous Prefecture, Sichuan Province Patentee before: XICHANG STEEL VANADIUM CO.,LTD., PANGANG Group |
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| TR01 | Transfer of patent right |