CN109814633A - A kind of extra-high voltage transformer cooler control circuit and its control method - Google Patents
A kind of extra-high voltage transformer cooler control circuit and its control method Download PDFInfo
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- CN109814633A CN109814633A CN201711163851.8A CN201711163851A CN109814633A CN 109814633 A CN109814633 A CN 109814633A CN 201711163851 A CN201711163851 A CN 201711163851A CN 109814633 A CN109814633 A CN 109814633A
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- 238000000034 method Methods 0.000 title claims description 12
- 101100288313 Arabidopsis thaliana KTI4 gene Proteins 0.000 claims abstract description 19
- 101150010279 KTI1 gene Proteins 0.000 claims abstract description 19
- 101100288314 Arabidopsis thaliana KTI5 gene Proteins 0.000 claims abstract description 10
- 101150074405 KTI2 gene Proteins 0.000 claims abstract description 10
- 238000004804 winding Methods 0.000 claims abstract description 10
- 101150011817 KTI3 gene Proteins 0.000 claims abstract description 6
- 101001090172 Homo sapiens Kinectin Proteins 0.000 claims description 15
- 102100034751 Kinectin Human genes 0.000 claims description 15
- 230000003111 delayed effect Effects 0.000 claims description 11
- 239000013589 supplement Substances 0.000 claims description 4
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The present invention provides a kind of extra-high-voltage alternating current transformer cooler control circuits, including AC single phase power supply 3Q, temperature control instructions device OTI1, OTI2, exchange time relay KTI1, KTI2, KTI3, winding temperature controller WTI, AC intermediate relay K3, K4, electric current relay KC, cooler change-over switch SCN, SCN points are " spare, stop, work, four gears of auxiliary ", oil flow relay K0N, exchange time relay KTN, KTN1-KTN4, electrothermal relay KHN, KHN1-KHN4, three-phase alternating current is spaced apart QN, single phase ac is spaced apart QN1, three-phase Oil pump electrical machinery MBN, three-phase fan motor MFN1-MFN4.The present invention can be searched by circuit using traditional relay-contactor control, live operation maintenance personnel and voluntarily be handled every problem, it is not necessary to producer is relied on, but circuit is fairly simple to be illustrated, cooler can realize automatic control, and oil pump can start by platform, intelligent higher.
Description
Technical field
The present invention relates to extra-high voltage transformer cooling technology field more particularly to the control circuits and its controlling party of cooler
Method.
Background technique
China 1000kV extra-high-voltage alternating current transformer rated capacity is generally 3000MVA at present, and transformer is by main body transformation
Device and regulating compensation transformer two parts composition, main body, which becomes, uses forced oil-circulation air cooling way, 8 groups of coolers of every phase, pressure regulation
Compensator transformer uses the Natural Oil Circulation Power type of cooling.According to " the State Grid Corporation of China newly issued in 2012, State Grid Corporation of China
18 great anti-accident measures of power grid " regulation: " the latent oil pump startup of strong oil loop structure should be enabled by platform, and time delay interval is answered
In 30s or more, to prevent gas relay malfunction ", therefore the cooler of extra-high voltage transformer should start and between the time by platform
Every being greater than 30s.
Generally there are two types of implementations for extra-high voltage transformer cooler control circuit at present, the first is based on the micro- of PLC
Various factors comprehensive analysis can be realized the control by platform oil pump and fan by algorithm by machine control system, the control system, but
It is systematic comparison complexity, practical O&M is relatively difficult, once chip goes wrong, live operation maintenance personnel can not solve in time,
Producers can only be waited to be handled, cause unnecessary power failure；Second is connect using traditional relay-contactor control system
Line is complicated, is controlled using manual mode, intelligent lower, and some even can not achieve oil pump and start by platform.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of extra-high voltage transformer cooler control circuit and its controlling party
Method.Using traditional relay-contactor control, live operation maintenance personnel can be searched voluntarily processing items by circuit and asked the present invention
Topic, it is not necessary to producer is relied on, but circuit is fairly simple to be illustrated, cooler can realize automatic control, and oil pump can start by platform, intelligence
Change higher.
The technical scheme of the present invention is realized as follows:
A kind of extra-high-voltage alternating current transformer cooler control circuit, characterized by comprising: AC single phase power supply 3Q, temperature
Control instructions device OTI1, OTI2, exchange time relay KTI1, KTI2, KTI3, winding temperature controller WTI, exchange it is intermediate after
Electric appliance K3, K4, electric current relay KC, SCN, SCN points of cooler change-over switch are " spare, stopping, work, auxiliary " four shelves
Position, oil flow relay KON, exchange time relay KTN, KTN1-KTN4, electrothermal relay KHN, KHN1-KHN4, three-phase alternating current are empty
Open QN, single phase ac is spaced apart QN1, three-phase Oil pump electrical machinery MBN, three-phase fan motor MFN1-MFN4, N=1,2,3,4,5,6,7,
8；
The cooler is divided into 8 groups, and the 1st, 3,5,7 group is in working condition, and the 2nd, 4,6 group is secondary status, and the 8th group is standby
Use state.
Control circuit specific work process are as follows:
(1) course of normal operation,
4 groups of coolers are in running order, and electrothermal relay KHN, KHN1, KHN2, KHN4 are inactive, then KTN, KTN1,
KTN2, KTN4 delayed startup, working group's cooler investment, 1,3,5,7 group of work cooler be respectively set delay be 0s, 30s,
60s,90s；
(2) back work process,
OTI1, OTI2, KTI1, WTI parallel connection constitute the entry condition of supplement heat rejecter, OTI1, OTI2, KTI1, WTI generation respectively
Table temperature of oil in transformer 1, oil temperature 2, transformer load electric current, transformer winding temperature, initiation value is respectively 55 DEG C, 75 DEG C, 75 DEG C,
1A；
When meeting one of the following conditions: 1. oil temperature reaches OTI2, OTI2 normal opened contact closure；2. winding temperature reaches WTI,
WTI normal opened contact closure；3. transformer load overrate, starts KC, KC normal opened contact closure starts KTI1, delay one
KTI1 normal opened contact of fixing time closure；Then starting K3 intermediate relay, K3 normal opened contact is closed, and electrothermal relay KHN, KHN1,
KHN2, KHN4 are inactive, then KTN, KTN1, KTN2, KTN4 delayed startup, assisted group cooler investment, 2,4,6 groups of supplement heat rejecters
It is 0s, 30s, 60s that delay, which is respectively set, in device；
When temperature is lower than OTI1, auxiliary cooler is exited, and temperature is lower than OTI2, KTI1 at this time, and load current is lower than
WTI；
(3) the spare course of work,
If broken down in working group or the assisted group cooler put into, in KHN, KHN1, KHN2, KHN4
Certain primary Ioops electric motor loop electric current becomes larger, and loop temperature increases, any one starting in KHN, KHN1, KHN2, KHN4, KTN,
KTN1, KTN2, KTN4 power loss return, KTN, KTN1, KTN2, KTN4 normally closed contact closure, K3, SCN auxiliary, KTN or KTN1,
KTN2, KTN4, SCN auxiliary, K3 conducting or SCN work, SCN work conducting, the starting of the KTI2 time relay, delay are certain
Time KTI2 normal opened contact closure, then K4 intermediate relay start, K4 normal opened contact closure, in stand-by state cooler according to
Setting themselves delayed startup, is simultaneously emitted by alarm signal.
Circuit of the present invention is simple, using grouping and setting cooler start-up study, can start simultaneously to avoid cooler oil pump,
Avoid Buchholz relay malfunction.It also have the advantage that
1, save the cost, the invention reduce many costs than mainstream PLC control system, and PLC generally uses chip inlet,
Higher cost, while maintenance cost is also high；
2, be convenient for operation management and issue handling, staff can voluntarily search problem according to drawing, will not excessively according to
Rely producer.
Detailed description of the invention
Fig. 1 is the circuit diagram of extra-high voltage transformer cooler control circuit in the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, is only used for explaining
The present invention, and be not considered as limiting the invention.
Control circuit of the present invention is as shown in Figure 1, wherein 3Q is AC single phase power supply, and OTI1, OTI2 are temperature control
Indicator processed, respectively 55 DEG C, 75 DEG C, KTI1, KTI2, KTI3 are exchange time relay, and WTI is winding temperature controller,
It is 75 DEG C, K3, K4 are AC intermediate relay, and KC is electric current relay, and rated current 1A, SCN are cooler change-over switch,
It is divided into " spare, stopping, work, auxiliary " four gears, SCN-1 is operation range, SCN-2 is auxiliary-range, SCN-3 is spare
Gear, KON are the oil flow relay above each cooler, and KTN, KTN1-KTN4 are exchange time relay, KHN, KHN1-
KHN4 is electrothermal relay, and QN is spaced apart for three-phase alternating current, and QN1 is spaced apart for single phase ac, and MBN is three-phase Oil pump electrical machinery, MFN1-MFN4
For three-phase fan motor, N=1,2,3,4,5,6,7,8.
Extra-high voltage transformer cooler is divided into 8 groups, and working condition is organized in 4 (1,3,5,7), and secondary status is organized in 3 (2,4,6), and 1
(8) stand-by state is organized；30s, respectively 0s, 30s, 60s, 90s are divided between in running order cooler starting；In auxiliary
30s, respectively 0s, 30s, 60s are divided between the cooler starting of state；30s is divided between cooler starting in stand-by state.
The following of the course of work of the invention
(1) course of normal operation.
4 groups of coolers are in running order, and electrothermal relay KHN, KHN1, KHN2, KHN4 are inactive, then KTN, KTN1,
KTN2, KTN4 delayed startup, working group's cooler investment, 1,3,5,7 group of work cooler be respectively set delay be 0s, 30s,
60s、90s。
(2) back work process.
Referring to attached drawing, OTI1, OTI2, KTI1, WTI parallel connection constitute the entry condition of supplement heat rejecter, OTI1, OTI2, KTI1,
WTI respectively represents temperature of oil in transformer 1, oil temperature 2, transformer load electric current, transformer winding temperature, initiation value is respectively 55 DEG C,
75℃、75℃、1A。
When meeting one of the following conditions: 1. oil temperature reaches OTI2 (OTI2 normal opened contact closure)；2. winding temperature reaches WTI
(WTI normal opened contact closure)；3. transformer load overrate (starting KC, KC normal opened contact closure), starts KTI1, delay
Certain time KTI1 normal opened contact closure.Then starting K3 intermediate relay, K3 normal opened contact is closed, and electrothermal relay KHN,
KHN1, KHN2, KHN4 are inactive, then KTN, KTN1, KTN2, KTN4 delayed startup, and assisted group cooler investment, 2,4,6 groups auxiliary
Helping cooler that delay is respectively set is 0s, 30s, 60s.
When temperature is lower than OTI1, auxiliary cooler is exited, and temperature is lower than OTI2, KTI1 at this time, and load current is lower than
WTI。
(3) the spare course of work.
If broken down in working group or the assisted group cooler put into, in KHN, KHN1, KHN2, KHN4
Certain primary Ioops electric motor loop electric current becomes larger, and loop temperature increases, any one starting in KHN, KHN1, KHN2, KHN4, KTN,
KTN1, KTN2, KTN4 power loss return, KTN, KTN1, KTN2, KTN4 normally closed contact closure, K3, SCN auxiliary, KTN or (KTN1,
KTN2, KTN4), SCN auxiliary, K3 conducting or SCN work, SCN work conducting, the starting of the KTI2 time relay, delay it is certain
Time KTI2 normal opened contact closure, then K4 intermediate relay start, K4 normal opened contact closure, in stand-by state cooler according to
Setting themselves delayed startup, is simultaneously emitted by alarm signal.
Also, KON is the oil flow relay above each cooler, and when oil stream is in the right direction, KON starting, cooler is just
Really work；When oil stream poor direction, KON does not start, then starts spare group of cooler.When spare group of cooler breaks down
When, KTI3 starting issues alarm signal.
Above-mentioned auxiliary cooler entry condition can increase as needed, work at the same time and auxiliary cooler starts time interval
It is freely adjustable.
It should be noted that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to preferable
Embodiment describes the invention in detail, those skilled in the art should understand that, it can be to technology of the invention
Scheme is modified or replaced equivalently, and without departing from the spirit and scope of the technical solution of the present invention, should all be covered in this hair
In bright scope of the claims.
Claims (5)
1. a kind of extra-high-voltage alternating current transformer cooler control circuit, characterized by comprising: AC single phase power supply 3Q, temperature control
Indicator OTI1, OTI2 processed, exchange time relay KTI1, KTI2, KTI3, winding temperature controller WTI exchange intermediate relay
Device K3, K4, electric current relay KC, SCN, SCN points of cooler change-over switch are " spare, stopping, work, auxiliary " four gears,
Oil flow relay K0N, exchange time relay KTN, KTN1-KTN4, electrothermal relay KHN, KHN1-KHN4, three-phase alternating current are spaced apart
QN, single phase ac are spaced apart QN1, three-phase Oil pump electrical machinery MBN, three-phase fan motor MFN1-MFN4, N=1,2,3,4,5,6,7,8；
The cooler is divided into 8 groups, and the 1st, 3,5,7 group is in working condition, and the 2nd, 4,6 group is secondary status, and the 8th group is spare shape
State.
2. cooler control circuit according to claim 1, it is characterised in that OTI1, OTI2 are respectively 55 DEG C, 75 DEG C,
WTI is 75 DEG C, and KC rated current is 1A.
3. cooler control circuit according to claim 1, it is characterised in that between in running order cooler starting
It is divided into 30s, respectively 0s, 30s, 60s, 90s；30s is divided between cooler starting in secondary status, respectively 0s, 30s,
60s；30s is divided between cooler starting in stand-by state.
4. the control method of according to claim 1 or 2 or 3 control circuits, which is characterized in that specific work process are as follows:
(1) course of normal operation,
4 groups of coolers are in running order, and electrothermal relay KHN, KHN1, KHN2, KHN4 are inactive, then KTN, KTN1, KTN2,
KTN4 delayed startup, working group's cooler investment, 1,3,5,7 group of work cooler be respectively set delay be 0s, 30s, 60s,
90s；
(2) back work process,
OTI1, OTI2, KTI1, WTI parallel connection constitute the entry condition of supplement heat rejecter, and OTI1, OTI2, KTI1, WTI respectively represent change
Depressor oil temperature 1, oil temperature 2, transformer load electric current, transformer winding temperature, initiation value are respectively 55 DEG C, 75 DEG C, 75 DEG C, 1A；
When meeting one of the following conditions: 1. oil temperature reaches OTI2, OTI2 normal opened contact closure；2. winding temperature reaches WTI, WTI
Normal opened contact closure；3. transformer load overrate, starts KC, KC normal opened contact closure starts KTI1, one timing of delay
Between KTI1 normal opened contact be closed；Then start K3 intermediate relay, K3 normal opened contact closure, and electrothermal relay KHN, KHN1, KHN2,
KHN4 is inactive, then KTN, KTN1, KTN2, KTN4 delayed startup, assisted group cooler investment, 2,4,6 groups of auxiliary coolers point
She Zhi not be delayed is 0s, 30s, 60s；
When temperature is lower than OTI1, auxiliary cooler is exited, and temperature is lower than OTI2, KTI1 at this time, and load current is lower than WTI；
(3) the spare course of work,
It is a certain in KHN, KHN1, KHN2, KHN4 if broken down in working group or the assisted group cooler put into
Circuit electric motor loop electric current becomes larger, and loop temperature increases, any one starting in KHN, KHN1, KHN2, KHN4, KTN, KTN1,
KTN2, KTN4 power loss return, KTN, KTN1, KTN2, KTN4 normally closed contact closure, K3, SCN auxiliary, KTN or KTN1, KTN2,
KTN4, SCN auxiliary, K3 conducting or SCN work, SCN work conducting, the starting of the KTI2 time relay, be delayed certain time
KTI2 normal opened contact closure, then K4 intermediate relay starts, K4 normal opened contact closure, in stand-by state cooler according to itself
Delayed startup is set, alarm signal is simultaneously emitted by.
5. control method according to claim 4, which is characterized in that when oil stream is in the right direction, KON starting, cooler is just
Really work；When oil stream poor direction, KON does not start, then starts spare group of cooler；When spare group of cooler breaks down
When, KTI3 starting issues alarm signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711163851.8A CN109814633B (en) | 2017-11-20 | Extra-high voltage transformer cooler control circuit and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711163851.8A CN109814633B (en) | 2017-11-20 | Extra-high voltage transformer cooler control circuit and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109814633A true CN109814633A (en) | 2019-05-28 |
| CN109814633B CN109814633B (en) | 2024-05-31 |
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