CN206422725U - A kind of air blower power frequency and converting operation switching control - Google Patents
A kind of air blower power frequency and converting operation switching control Download PDFInfo
- Publication number
- CN206422725U CN206422725U CN201720143157.9U CN201720143157U CN206422725U CN 206422725 U CN206422725 U CN 206422725U CN 201720143157 U CN201720143157 U CN 201720143157U CN 206422725 U CN206422725 U CN 206422725U
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- Prior art keywords
- electrically connected
- switch
- primary air
- air fan
- power frequency
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Abstract
The utility model embodiment discloses a kind of air blower power frequency and converting operation switching control, including DCS control systems, entry switch QF1, by-pass switch QF3, high voltage converter, gate out switch QF2 and primary air fan inlet baffle is electrically connected in the DCS control systems；6KV buses and high voltage converter is electrically connected in the entry switch QF1；The high voltage converter is electrically connected with the gate out switch QF2；Primary air fan motor and the by-pass switch QF3 is electrically connected in the gate out switch QF2；The by-pass switch QF3 is electrically connected with the 6KV buses；The primary air fan motor is electrically connected with primary air fan；The primary air fan is electrically connected with the primary air fan inlet baffle.The beneficial effect of the utility model is that it is possible to prevente effectively from frequency converter itself failure and the problem of induce trip event by extraneous factor, and security protection performance is high.
Description
Technical field
The utility model is related to control device field, and more particularly to a kind of air blower power frequency is filled with converting operation switching control
Put.
Background technology
Air blower is subsidiary engine important in thermal power plant, and capacity is big, power consumption is more, and be chronically at continuous operation, it is low
Load and variable load operation state, most of at present that air blower main-piping pressure is controlled by the way of flow restriction control, it saves latent
Power is huge, and it is more satisfactory energy saving way to carry out speed governing using air blower power frequency and converting operation switching control.
, there is frequency converter failure itself and by extraneous factor in current air blower power frequency and converting operation switching control
The problem of inducing trip event.
Utility model content
The utility model provides a kind of air blower power frequency and converting operation switching control, can solve prior art
In, there is frequency converter failure itself and induced by extraneous factor in current air blower power frequency and converting operation switching control
The problem of trip event.
The utility model provides a kind of air blower power frequency and converting operation switching control, including DCS control systems,
Entry switch QF1, by-pass switch QF3, high voltage converter, gate out switch QF2 and one is electrically connected in the DCS control systems
Secondary fans entrance baffle plate；6KV buses and high voltage converter is electrically connected in the entry switch QF1；The high voltage converter
It is electrically connected with the gate out switch QF2；Primary air fan motor is electrically connected in the gate out switch QF2 and the bypass is opened
Close QF3；The by-pass switch QF3 is electrically connected with the 6KV buses；The primary air fan motor is electrically connected with primary air fan；
The primary air fan is electrically connected with the primary air fan inlet baffle.
It is preferred that the DCS control systems use blind controller system of new generation.
It is preferred that the entry switch QF1 uses frequency converter entrance circuit breaker Q F1.
It is preferred that the gate out switch QF2 uses frequency converter outlet breaker QF2.
It is preferred that the by-pass switch QF3 uses power frequency bypass breaker QF3.
It is preferred that the primary air fan motor uses YKK630--6 type squirrel-cage motors, rated voltage 6KV, specified work(
Rate is 1120KW, and rated current is 122.6A, and rotating speed is 1486 revs/min.
There is provided a kind of air blower power frequency and converting operation switching control in the utility model embodiment, work as air-introduced machine
During converting operation mode, then operation frequency converter entrance breaker, outlet breaker closure start frequency converter, open First air
Machine converting operation.During power frequency operation, frequency converter entrance breaker, outlet breaker are disconnected, power frequency bypass breaker is then closed
It is transformed into power frequency operation.When frequency converter is overhauled, QF1, QF2 breaker are pulled out, obvious breakpoint is formed.
Electric interlock and operation basic principle are as follows：1. frequency converter entrance circuit breaker Q F1 realizes interlock protection with frequency converter,
When frequency converter does not possess power transmission condition, locking QF1 closing circuits, when there is weight failure in frequency converter, urgent disjunction QF1 open circuits
Device.2. frequency converter outlet breaker QF2 realizes interlock protection with frequency converter, when QF2 is not closed, No starting frequency converter.
3. there is electric hardwire and the dual blocking function of DCS logics between QF3 and QF2, two breakers can not be closed at.4. break
There is interlock function in the grounding switch at road device QF2 and circuit breaker Q F3, maloperation causes seriously when preventing equipment from running or overhauling
Accident.5. QF1 breakers match somebody with somebody tranformer protection, and tripping QF1 breakers during protection act even jump QF2 breakers.QF3 breakers
Configure motor protection, tripping QF3 breakers during protection act.QF2 breakers configure motor protection, locking during protection act
Frequency conversion switches to power frequency.The problem of allowing to be prevented effectively from frequency converter failure itself and induce trip event by extraneous factor,
And security protection performance is high.
Brief description of the drawings
The principle schematic that Fig. 1 provides for the utility model.
Embodiment
Below in conjunction with the accompanying drawings, an embodiment of the present utility model is described in detail, it is to be understood that this
The protection domain of utility model is not limited by embodiment.
As shown in figure 1, a kind of air blower power frequency and converting operation switching control that the utility model embodiment is provided,
Including DCS control systems, entry switch QF1, by-pass switch QF3, high-pressure frequency-conversion is electrically connected in the DCS control systems
Device, gate out switch QF2 and primary air fan inlet baffle；6KV buses and high-pressure frequency-conversion is electrically connected in the entry switch QF1
Device；The high voltage converter is electrically connected with the gate out switch QF2；First air is electrically connected in the gate out switch QF2
Electromechanical machine and the by-pass switch QF3；The by-pass switch QF3 is electrically connected with the 6KV buses；The primary air fan motor
It is electrically connected with primary air fan；The primary air fan is electrically connected with the primary air fan inlet baffle.The DCS control systems are adopted
It is blind controller system of new generation.The entry switch QF1 uses frequency converter entrance circuit breaker Q F1.The outlet
Switch QF2 uses frequency converter outlet breaker QF2.The by-pass switch QF3 uses power frequency bypass breaker QF3.
The primary air fan motor uses YKK630--6 type squirrel-cage motors, and rated voltage 6KV, rated power is 1120KW, specified
Electric current is 122.6A, and rotating speed is 1486 revs/min.
Operation principle：The air blower power frequency and converting operation switching control, when air-introduced machine converting operation mode, behaviour
Make frequency converter entrance breaker, outlet breaker closure, then start frequency converter, open primary air fan converting operation.Power frequency is transported
During row, frequency converter entrance breaker, outlet breaker are disconnected, power frequency bypass breaker is then closed and is transformed into power frequency operation.When
When frequency converter is overhauled, QF1, QF2 breaker are pulled out, obvious breakpoint is formed.Electric interlock and operation basic principle are as follows：
1. frequency converter entrance circuit breaker Q F1 realizes interlock protection with frequency converter, when frequency converter does not possess power transmission condition, closes
QF1 closing circuits are locked, when there is weight failure in frequency converter, urgent disjunction QF1 breakers.
2. frequency converter outlet breaker QF2 realizes interlock protection with frequency converter, when QF2 is not closed, and No starting becomes
Frequency device.
3. there is electric hardwire and the dual blocking function of DCS logics between QF3 and QF2, two breakers can not be simultaneously
Closure.
4. there is interlock function in the grounding switch at circuit breaker Q F2 and circuit breaker Q F3, prevent equipment from running or maintenance mistiming
Operation causes major accident.
5. QF1 breakers match somebody with somebody tranformer protection, and tripping QF1 breakers during protection act even jump QF2 breakers.QF3 open circuits
Device configures motor protection, tripping QF3 breakers during protection act.QF2 breakers configure motor protection, are closed during protection act
Lock frequency conversion switches to power frequency.Allow to be prevented effectively from frequency converter failure itself and asking for trip event is induced by extraneous factor
Topic, and security protection performance is high.
Disclosed above is only specific embodiment of the utility model, and still, the utility model embodiment is not limited to
This, the changes that any person skilled in the art can think of should all fall into protection domain of the present utility model.
Claims (6)
1. a kind of air blower power frequency and converting operation switching control, it is characterised in that：Including DCS control systems, the DCS
Entry switch QF1, by-pass switch QF3, high voltage converter, gate out switch QF2 and primary air fan is electrically connected in control system
Inlet baffle；6KV buses and high voltage converter is electrically connected in the entry switch QF1；The high voltage converter with it is described
Gate out switch QF2 is electrically connected with；Primary air fan motor and the by-pass switch QF3 is electrically connected in the gate out switch QF2；
The by-pass switch QF3 is electrically connected with the 6KV buses；The primary air fan motor is electrically connected with primary air fan；Described one
Secondary blower fan is electrically connected with the primary air fan inlet baffle.
2. a kind of air blower power frequency according to claim 1 and converting operation switching control, it is characterised in that described
DCS control systems use blind controller system of new generation.
3. a kind of air blower power frequency according to claim 1 and converting operation switching control, it is characterised in that described
Entry switch QF1 uses frequency converter entrance circuit breaker Q F1.
4. a kind of air blower power frequency according to claim 1 and converting operation switching control, it is characterised in that described
Gate out switch QF2 uses frequency converter outlet breaker QF2.
5. a kind of air blower power frequency according to claim 1 and converting operation switching control, it is characterised in that described
By-pass switch QF3 uses power frequency bypass breaker QF3.
6. a kind of air blower power frequency according to claim 1 and converting operation switching control, it is characterised in that described
Primary air fan motor uses YKK630--6 type squirrel-cage motors, and rated voltage 6KV, rated power is 1120KW, rated current
For 122.6A, rotating speed is 1486 revs/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720143157.9U CN206422725U (en) | 2017-02-10 | 2017-02-10 | A kind of air blower power frequency and converting operation switching control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720143157.9U CN206422725U (en) | 2017-02-10 | 2017-02-10 | A kind of air blower power frequency and converting operation switching control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206422725U true CN206422725U (en) | 2017-08-18 |
Family
ID=59569941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720143157.9U Expired - Fee Related CN206422725U (en) | 2017-02-10 | 2017-02-10 | A kind of air blower power frequency and converting operation switching control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206422725U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737096A (en) * | 2020-12-25 | 2021-04-30 | 中国电力工程顾问集团西北电力设计院有限公司 | Service power supply wiring structure for limiting short-circuit current during back pressure machine expansion and control method |
-
2017
- 2017-02-10 CN CN201720143157.9U patent/CN206422725U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737096A (en) * | 2020-12-25 | 2021-04-30 | 中国电力工程顾问集团西北电力设计院有限公司 | Service power supply wiring structure for limiting short-circuit current during back pressure machine expansion and control method |
| CN112737096B (en) * | 2020-12-25 | 2023-06-16 | 中国电力工程顾问集团西北电力设计院有限公司 | Factory electric connection structure for limiting short-circuit current during back press expansion and control method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170818 Termination date: 20180210 |
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| CF01 | Termination of patent right due to non-payment of annual fee |