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 PDF

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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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China
Prior art keywords
electrically connected
switch
primary air
air fan
power frequency
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Expired - Fee Related
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CN201720143157.9U
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Chinese (zh)
Inventor
李书舟
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Hunan Electrical College of Technology
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Hunan Electrical College of Technology
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Priority to CN201720143157.9U priority Critical patent/CN206422725U/en
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Publication of CN206422725U publication Critical patent/CN206422725U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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

A kind of air blower power frequency and converting operation switching control
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.
CN201720143157.9U 2017-02-10 2017-02-10 A kind of air blower power frequency and converting operation switching control Expired - Fee Related CN206422725U (en)

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)

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CN206422725U true CN206422725U (en) 2017-08-18

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Cited By (1)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20170818

Termination date: 20180210

CF01 Termination of patent right due to non-payment of annual fee