CN101916980A - Interlock protection device and method for dry type transformer - Google Patents
Interlock protection device and method for dry type transformer Download PDFInfo
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- CN101916980A CN101916980A CN 201010252563 CN201010252563A CN101916980A CN 101916980 A CN101916980 A CN 101916980A CN 201010252563 CN201010252563 CN 201010252563 CN 201010252563 A CN201010252563 A CN 201010252563A CN 101916980 A CN101916980 A CN 101916980A
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Abstract
The invention relates to an interlock protection device for a dry type transformer. The device mainly comprises a dry type transformer temperature controller, a temperature thermocouple, an SF6 load switch, a breaking coil TQ, an intermediate relay KA3, a fuse RD1 and a mechanical interlock contact A, wherein the fuse RD1, the intermediate relay KA3, the breaking coil TQ and the mechanical interlock contact A are connected in series through a lead. The device is characterized in that: a plurality of alarm protective circuits are connected in parallel to the input end of the fuse RD1 and the output end of the mechanical interlock contact A; each alarm protective circuit comprises a fuse, output switch contacts with different temperatures and an intermediate relay; the intermediate relay is electrically connected with the temperature thermocouple; and the output end of the intermediate relay is connected with a programmable logic controller (PLC) module in a middle end control chamber. The plurality of alarm protective circuits are arranged in parallel, so that the problem of insulation damage of a winding caused by the temperature rising of the dry type transformer is solved.
Description
Technical field
The present invention relates to a kind of dry-type transformer and carry electric power system protective device and guard method.
Background technology
Along with the enforcement in the future of big Red Hill iron ore concentrate pipeline transportation capacity expansion project, the dehydrating plant supply load will strengthen, and field condition is that dry-type transformer is installed in the switchgear house, and switchgear house has carried out sealing for preventing dust to be handled.Because heat radiation is bad; the temperature of transformer also can raise; the control protection system of former designing institute design only limits to the firm power protection system of iron-smelter pelletizing workshop high voltage supply cabinet; the transformer of dehydrating plant has only transformer producer thermostat detection providing with the machine transformer temperature to carry out the heat radiation of cabinet inner blower above 100 ℃, and protected mode exists not enough.
When fan trouble or damage and to dispel the heat, to cause Accident of Transformer, according to the power supply importance and the economic worth of transformer, need be at the transformer overtemperature alarm, temperature is elevated to the operating provisions temperature and powers to cutting off, otherwise there is hidden danger in the transformer safe operation.
Summary of the invention
The present invention has designed a kind of dry-type transformer interlock protection device and method, and it has solved following technical problem is that dry-type transformer causes winding insulation to damage easily because temperature raises.
For the technical problem of the above-mentioned existence of deblocking, the present invention by the following technical solutions:
A kind of dry-type transformer interlock protection device, mainly comprise: dry-type transformer thermostat, temperature thermocouple, SF6 on-load switch, breaking coil TQ, auxiliary relay KA3, fuse RD1 and mechanical chain contact A, described fuse RD1, described auxiliary relay KA3, described breaking coil TQ and described mechanical chain contact A are connected in series by lead, in the input of described fuse RD1 many alarm protective circuit in parallel with the output of described mechanical chain contact A; Described every alarm protective circuit comprises output make and break contact B, C and the auxiliary relay of fuse, different temperatures successively; Described auxiliary relay is electrically connected with described temperature thermocouple, and the output of described auxiliary relay is connected with PLC module in the middle-end control room.
Further, the shared fuse RD2 of described every alarm protective circuit.
The output of auxiliary relay KA1 in the described alarm protective circuit and the S7-300PLC-SM321 module SM6 contact in the middle-end control room, terminal number 1.
Further, the output of the auxiliary relay KA2 in described another alarm protective circuit and the S7-300PLC-SM321 module SM6 contact in the middle-end control room, terminal numbers 2.
A kind of dry-type transformer interlock protection method may further comprise the steps:
When thermostat detection transformer temperature reaches 100 ℃, auxiliary relay KA1 coil electricity, auxiliary relay KA1 normally opened contact closure, digital input signals enters the PLC module, and the Central Control Room man-machine interface shows overtemperature alarm;
When thermostat detection transformer temperature reaches 130 ℃, auxiliary relay KA2 coil electricity, auxiliary relay KA2 normally opened contact closure, one the tunnel acts on described SF6 on-load switch tripping operation, one way word input signal enters the PLC module, and the Central Control Room man-machine interface shows high temperature tripping operation transformer outage and reports to the police.
This dry-type transformer interlock protection device and method have following beneficial effect:
(1) the present invention has been owing to be arranged in parallel many alarm protective circuit, thereby solved dry-type transformer because the problem that temperature raises and causes winding insulation to damage.
(2) transformer of the present invention after by technological transformation can safe and reliable operation, and the unnecessary damage that reduces transformer causes the dehydration power supply to be affected.
(3) the present invention is because the temperature of transformer can be provided by required hardware less investment, most of attached and standby functions of relying on existing equipment to provide of transforming.
Description of drawings
Fig. 1 is a protective circuit connection diagram in the dry-type transformer interlock protection device of the present invention;
Fig. 2 is protective circuit and the PLC module connection diagram in the dry-type transformer interlock protection device of the present invention.
Description of reference numerals:
RD1, RD2-fuse; KA1, KA2, KA3-auxiliary relay; The TQ-breaking coil; The N-zero line;
SM6-I0.1-Central Control Room S7-300PLC-SM321 module SM6 contact, terminal number 1;
SM6-I0.2-Central Control Room S7-300PLC-SM321 module SM6 contact, terminal numbers 2;
A-on-load switch mechanical chain contact;
100 ℃ of output of B-transformer temperature controller detected temperatures make and break contact;
130 ℃ of output of C-transformer temperature controller detected temperatures make and break contact.
Embodiment
Below in conjunction with Fig. 1 and Fig. 2, the present invention will be further described:
A kind of dry-type transformer interlock protection device, mainly comprise: dry-type transformer thermostat, temperature thermocouple, SF6 on-load switch, breaking coil TQ, auxiliary relay KA3, fuse RD1 and mechanical chain contact A, described fuse RD1, described auxiliary relay KA3, described breaking coil TQ and described mechanical chain contact A are connected in series by lead, in the input of described fuse RD1 many alarm protective circuit in parallel with the output of described mechanical chain contact A; Every alarm protective circuit comprises output make and break contact B, C and the auxiliary relay of fuse, different temperatures successively; Auxiliary relay is electrically connected with temperature thermocouple, and the output of auxiliary relay is connected with PLC module in the middle-end control room.
Every shared fuse RD2 of alarm protective circuit.Be many alarm protective circuit with after this fuse RD2 connects, carry out parallel connection again.
As shown in Figure 2, the output of the auxiliary relay KA1 in alarm protective circuit and the S7-300PLC-SM321 module SM6 contact in the middle-end control room, terminal number 1.Auxiliary relay KA2's in another alarm protective circuit is defeated by the S7-300PLC-SM321 module SM6 contact in end and the middle-end control room, terminal numbers 2.
Dry-type transformer interlock protection device operation principle of the present invention is as follows:
When thermostat detection transformer temperature reaches 100 ℃, auxiliary relay KA1 coil electricity, auxiliary relay KA1 normally opened contact closure, digital input signals enters the PLC module, and the Central Control Room man-machine interface shows overtemperature alarm;
When thermostat detection transformer temperature reaches 130 ℃, auxiliary relay KA2 coil electricity, auxiliary relay KA2 normally opened contact closure, one the tunnel acts on described SF6 on-load switch tripping operation, one way word input signal enters the PLC module, and the Central Control Room man-machine interface shows high temperature tripping operation transformer outage and reports to the police.
In conjunction with the accompanying drawings the present invention has been carried out exemplary description above; obvious realization of the present invention is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; or design of the present invention and technical scheme are directly applied to other occasion without improving, all in protection scope of the present invention.
Claims (5)
1. dry-type transformer interlock protection device, mainly comprise: dry-type transformer thermostat, temperature thermocouple, SF6 on-load switch, breaking coil TQ, auxiliary relay KA3, fuse RD1 and mechanical chain contact A, described fuse RD1, described auxiliary relay KA3, described breaking coil TQ and described mechanical chain contact A are connected in series by lead, it is characterized in that: in the input of described fuse RD1 many alarm protective circuit in parallel with the output of described mechanical chain contact A; Described every alarm protective circuit comprises the output make and break contact and the auxiliary relay of fuse, different temperatures successively; Described auxiliary relay is electrically connected with described temperature thermocouple, and the output of described auxiliary relay is connected with PLC module in the middle-end control room.
2. according to the described dry-type transformer interlock protection device of claim 1, it is characterized in that: the shared fuse RD2 of described every alarm protective circuit.
3. according to claim 1 or 2 described dry-type transformer interlock protection devices, it is characterized in that: the output of the auxiliary relay KA1 in the described alarm protective circuit and the S7-300PLC-SM321 module SM6 contact in the middle-end control room, terminal number 1.
4. according to claim 1,2 or 3 described dry-type transformer interlock protection devices, it is characterized in that: the output of the auxiliary relay KA2 in described another alarm protective circuit and the S7-300PLC-SM321 module SM6 contact in the middle-end control room, terminal numbers 2.
5. one kind according to the described dry-type transformer interlock protection of claim 4 method, may further comprise the steps:
When thermostat detection transformer temperature reaches 100 ℃, auxiliary relay KA1 coil electricity, auxiliary relay KA1 normally opened contact closure, digital input signals enters the PLC module, and the Central Control Room man-machine interface shows overtemperature alarm;
When thermostat detection transformer temperature reaches 130 ℃, auxiliary relay KA2 coil electricity, auxiliary relay KA2 normally opened contact closure, one the tunnel acts on described SF6 on-load switch tripping operation, one way word input signal enters the PLC module, and the Central Control Room man-machine interface shows high temperature tripping operation transformer outage and reports to the police.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010252563 CN101916980B (en) | 2010-08-13 | 2010-08-13 | Interlock protection device and method for dry type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010252563 CN101916980B (en) | 2010-08-13 | 2010-08-13 | Interlock protection device and method for dry type transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101916980A true CN101916980A (en) | 2010-12-15 |
| CN101916980B CN101916980B (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010252563 Active CN101916980B (en) | 2010-08-13 | 2010-08-13 | Interlock protection device and method for dry type transformer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507028A (en) * | 2011-10-28 | 2012-06-20 | 江苏省电力公司大丰市供电公司 | Temperature monitoring device for high-frequency switching power supply |
| CN102938555A (en) * | 2012-10-24 | 2013-02-20 | 四川省电力公司达州电业局 | Multi-stage temperature protection device for transformer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1124880A (en) * | 1994-12-12 | 1996-06-19 | 黑龙江双城有载分接开关股份合作公司 | Multifunctional controlled cabinet for load shunting switch |
| JPH09219926A (en) * | 1996-02-15 | 1997-08-19 | Fuji Electric Co Ltd | Method of calculating temperature of main engine, and overload protective relay |
| CN2593436Y (en) * | 2002-01-24 | 2003-12-17 | 江苏省机电研究所 | Overtemperature accident treatment apparatus for multi-region heating equipment |
| CN101393245A (en) * | 2008-10-23 | 2009-03-25 | 山东达驰电气有限公司 | Synthesis monitoring instrument for transformer |
-
2010
- 2010-08-13 CN CN 201010252563 patent/CN101916980B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1124880A (en) * | 1994-12-12 | 1996-06-19 | 黑龙江双城有载分接开关股份合作公司 | Multifunctional controlled cabinet for load shunting switch |
| JPH09219926A (en) * | 1996-02-15 | 1997-08-19 | Fuji Electric Co Ltd | Method of calculating temperature of main engine, and overload protective relay |
| CN2593436Y (en) * | 2002-01-24 | 2003-12-17 | 江苏省机电研究所 | Overtemperature accident treatment apparatus for multi-region heating equipment |
| CN101393245A (en) * | 2008-10-23 | 2009-03-25 | 山东达驰电气有限公司 | Synthesis monitoring instrument for transformer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507028A (en) * | 2011-10-28 | 2012-06-20 | 江苏省电力公司大丰市供电公司 | Temperature monitoring device for high-frequency switching power supply |
| CN102938555A (en) * | 2012-10-24 | 2013-02-20 | 四川省电力公司达州电业局 | Multi-stage temperature protection device for transformer |
| CN102938555B (en) * | 2012-10-24 | 2016-02-10 | 四川省电力公司达州电业局 | A kind of multi-stage temperature protection device for transformer |
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| Publication number | Publication date |
|---|---|
| CN101916980B (en) | 2013-03-27 |
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