CN202260450U - Thermal-electric plant boiler high-pressure fan online power frequency/frequency conversion operation switch device - Google Patents
Thermal-electric plant boiler high-pressure fan online power frequency/frequency conversion operation switch device Download PDFInfo
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- CN202260450U CN202260450U CN2011203796081U CN201120379608U CN202260450U CN 202260450 U CN202260450 U CN 202260450U CN 2011203796081 U CN2011203796081 U CN 2011203796081U CN 201120379608 U CN201120379608 U CN 201120379608U CN 202260450 U CN202260450 U CN 202260450U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The utility model discloses a thermal-electric plant boiler high-pressure fan online power frequency/frequency conversion operation switch device, comprising a boiler DCS control system, a frequency converter, a fan, a frequency conversion input circuit breaker, a frequency conversion output circuit breaker, a power frequency input circuit breaker, a frequency conversion loop and a power frequency loop, wherein the fan is arranged on the input ends of the frequency converter and the circuit, the frequency conversion input circuit breaker, the frequency conversion output circuit breaker are arranged on the frequency conversion loop and respectively arranged on the input end and the output end of the frequency converter; the power frequency input circuit breaker is arranged on the bypath of the frequency conversion input circuit breaker and the frequency conversion output circuit breaker and connected with the power frequency loop; a control system of the frequency converter, the fan, the frequency conversion input circuit breaker, the frequency conversion output circuit breaker and the power frequency input circuit breaker are respectively connected with the boiler DCS control system. The fan power frequency/frequency conversion online switch function is realized. During the switching process of the power frequency and frequency conversion, the stop working accident of the switch device and the boiler is prevented, therefore the continuous normal operation of the boiler is ensured.
Description
Technical field
The utility model relates to the electrical engineering technical field, relates in particular to a kind of blower fan at lineman's converting operation switching device shifter.
Background technology
At present, it is to realize energy-conservation effective ways that frequency control is regulated, and is therefore obtaining promotion and application widely aspect blower fan and the water pump.Yet the failure rate of frequency converter is higher relatively, after frequency converter breaks down, need switch to operation under the power frequency state.But in thermal power plant boiler high pressure positive blower worker, the mutual handoff procedure of frequency conversion; Influence to the burner hearth positive/negative pressure is worried by operating personnel always; Especially after frequency converter failure trips when underload; It is bigger to recover in the power frequency process combustion chamber draft undulating value, control bad then might the negative pressure protection action and cause the blower fan shutdown, thereby cause the blowing out accident; And, after frequency converter is repaired, need to shut down blowing out, can blower fan be switched to operation under the frequency conversion state from power frequency, influenced the normal operation of boiler, be difficult to realize the stability and the reliability of boiler operatiopn.
The utility model content
The purpose of the utility model is to overcome the deficiency of prior art, provides a kind of thermal power plant boiler high pressure positive blower at lineman's converting operation switching device shifter, avoiding the shutdown blowing out accident in worker, the frequency conversion handoff procedure, thereby guarantees the operation of boiler normal and stable.
The purpose of the utility model is achieved through following technical scheme:
A kind of thermal power plant boiler high pressure positive blower that the utility model provides comprises boiler DCS control system, frequency converter, blower fan, frequency conversion input circuit breaker, frequency conversion output circuit breaker, power frequency input circuit breaker, frequency conversion loop and power frequency loop at lineman's converting operation switching device shifter; Said blower fan is arranged on the output of frequency converter and circuit, and said frequency conversion input circuit breaker, frequency conversion output circuit breaker are positioned on the frequency conversion loop and are separately positioned on the input and the output of frequency converter; Said power frequency input circuit breaker is arranged on the bypass of frequency conversion input circuit breaker and frequency conversion output circuit breaker and is connected on the power frequency loop; The control system of said frequency converter, blower fan, frequency conversion input circuit breaker, frequency conversion output circuit breaker, power frequency input circuit breaker are connected respectively on the boiler DCS control system.
The utility model is according to boiler DCS (Distributed Control System; Scattered control system) instruction of control system; Cooperate with frequency converter through frequency conversion input circuit breaker, frequency conversion output circuit breaker, power frequency input circuit breaker, realize the online mutual switching of power frequency, frequency conversion.When frequency conversion input circuit breaker, frequency conversion output breaker open operation, during power frequency input breaker closing, accomplish the frequency conversion switching frequently of changing a job.When frequency conversion input circuit breaker, frequency conversion output breaker closing, during power frequency input breaker open operation, accomplish power frequency and change switching frequently.
Further, be provided with the time relay in the said boiler DCS of the utility model control system, the said time relay is connected with frequency conversion output circuit breaker, power frequency input circuit breaker.When frequency conversion is changed a job frequently, make power frequency input breaker closing through time-delay, return with synchronous cooperation fans entrance air door and close certain aperture, thereby keep the steady of boiler pressure.When power frequency changed frequently, the time-delay of frequency conversion output circuit breaker was closed a floodgate to avoid the influence of counter electromotive force of motor.
The utlity model has following beneficial effect:
The utility model has been realized fanman, the online mutual handoff functionality of frequency conversion;, frequency converter can effectively guarantee that blower fan automatically switches to power frequency operation after breaking down; Can not cause the blowing out accident because of the shutdown of blower fan, also having solved simultaneously cogeneration power plant's frequency converter can't an online difficult problem from power frequency switchback frequency conversion, can guarantee the normal continuously operation of thermal power plant boiler fully; Be particularly useful for the long period cogeneration power plant of operation continuously, have remarkable economic efficiency and social benefit.
Description of drawings
To combine embodiment and accompanying drawing that the utility model is done further to describe in detail below:
Fig. 1 is the structural principle block diagram of the utility model embodiment.
Among the figure: blower fan M, frequency conversion input circuit breaker J1, frequency conversion output circuit breaker J2, power frequency input circuit breaker J3, time relay sj, the circuit breaker DL of electric substation.
Embodiment
The embodiment that is a kind of thermal power plant boiler high pressure positive blower of the utility model at lineman's converting operation switching device shifter shown in Figure 1; As shown in Figure 1, comprise boiler DCS control system, frequency converter, blower fan M, frequency conversion input circuit breaker J1, frequency conversion output circuit breaker J2, power frequency input circuit breaker J3, time relay sj, frequency conversion loop and power frequency loop.
Blower fan M is arranged on the output of frequency converter and circuit.Frequency conversion input circuit breaker J1, frequency conversion output circuit breaker J2 are positioned on the frequency conversion loop and are separately positioned on the input and the output of frequency converter.Power frequency input circuit breaker J3 is arranged on the bypass of frequency conversion input circuit breaker J1 and frequency conversion output circuit breaker J2 and is connected on the power frequency loop.Time relay sj is arranged in the boiler DCS control system.The control system of frequency converter, blower fan M, frequency conversion input circuit breaker J1, frequency conversion output circuit breaker J2, power frequency input circuit breaker J3 are connected respectively on the boiler DCS control system.Time relay sj is connected with frequency conversion output circuit breaker J2, power frequency input circuit breaker J3.
Present embodiment can pass through boiler DCS control system control of conversion device output frequency.When selection is automatic, regulate output automatically by the combustion chamber draft set point; Select when manual, output valve is manually imported by operating personnel, and input value is 0～100%, corresponding to frequency converter output 0～50Hz.
Circuit breaker DL is a 6kV electric substation circuit breaker, and frequency conversion input circuit breaker J1, frequency conversion output circuit breaker J2, power frequency input circuit breaker J3 and frequency converter are used realizes power frequency, the online mutual handoff procedure of frequency conversion.Under the normal starting state of frequency converter, frequency conversion input circuit breaker J1, frequency conversion output circuit breaker J2 close a floodgate, power frequency input circuit breaker J3 separating brake, and control system starts blower fan M, starts the frequency converter operate as normal then, and the fans entrance throttle opening is 100%.
The present embodiment blower fan can be taked following several kinds of modes at the handoff procedure of lineman's converting operation:
1, manual frequency conversion cut frequently
Before the switching, earlier frequency conversion output progressively is adjusted to the 50Hz operation, regulates the fans entrance throttle opening simultaneously, close 40% from 100% time.Send instruction by boiler DCS control system then, make frequency conversion input circuit breaker J1, frequency conversion output circuit breaker J2 separating brake after, power frequency input circuit breaker J3 is closed a floodgate.Automatically frequency conversion is changed a job through boiler DCS control system then and frequently reset switching frequently thereby the completion frequency conversion is changed a job.
2, frequency converter failure cut frequency (automatically)
When frequency converter breaks down; Boiler DCS control system is sent warning immediately; Immediately the fans entrance throttle opening from 100% time pass to certain aperture (can be provided with 40%); Sending instruction simultaneously gets frequency conversion input circuit breaker J1, frequency conversion output circuit breaker J2 separating brake and time relay sj; Delay time and make power frequency import the return pass process (for guarantee boiler pressure as early as possible recover steadily, while also the aperture of according to circumstances manual intervention adjusting fans entrance air door) of circuit breaker J3 combined floodgate with synchronous cooperation fans entrance air door, the switching of frequency thereby the completion frequency conversion is changed a job.
3, power frequency changes (manually) frequently
Motor is operate as normal under the power frequency state, and the fans entrance throttle opening is 40%.After frequency converter was repaired, boiler DCS control system was sent instruction and is made power frequency input circuit breaker J3 separating brake, and frequency conversion input circuit breaker J1 closes a floodgate; The frequency conversion output circuit breaker J2 that delays time after 2 seconds close a floodgate (avoiding the influence of counter electromotive force of motor); The control system of frequency converter starts catches restart function, begins to catch motor coasting operation rotating speed, and (rear motor reached the setting rotating speed in about 30 seconds to bring motor into converting operation rapidly; Generally be made as 50Hz), change switching frequently thereby accomplish power frequency.Then,, progressively increase the fans entrance throttle opening and reduce output frequency, realize the energy-saving and frequency-variable operation again according to the boiler working condition needs.
Above-mentioned blower fan is as shown in table 1 in the situation of lineman, converting operation switching mode.
Table 1 present embodiment blower fan is in lineman, converting operation switch instances (motor bringing onto load)
Claims (2)
1. a thermal power plant boiler high pressure positive blower is characterized in that at lineman's converting operation switching device shifter: comprise boiler DCS control system, frequency converter, blower fan (M), frequency conversion input circuit breaker (J1), frequency conversion output circuit breaker (J2), power frequency input circuit breaker (J3), frequency conversion loop and power frequency loop; Said blower fan (M) is arranged on the output of frequency converter and circuit, and input and the output that circuit breaker (J2) is positioned on the frequency conversion loop and is separately positioned on frequency converter exported in said frequency conversion input circuit breaker (J1), frequency conversion; Said power frequency input circuit breaker (J3) is arranged on the bypass of frequency conversion input circuit breaker (J1) and frequency conversion output circuit breaker (J2) and is connected on the power frequency loop; The control system of said frequency converter, blower fan (M), frequency conversion input circuit breaker (J1), frequency conversion output circuit breaker (J2), power frequency input circuit breaker (J3) are connected respectively on the boiler DCS control system.
2. thermal power plant boiler high pressure positive blower according to claim 1 is at lineman's converting operation switching device shifter; It is characterized in that: be provided with the time relay (SJ) in the said boiler DCS control system, the said time relay (SJ) is connected with frequency conversion output circuit breaker (J2), power frequency input circuit breaker (J3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203796081U CN202260450U (en) | 2011-09-30 | 2011-09-30 | Thermal-electric plant boiler high-pressure fan online power frequency/frequency conversion operation switch device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203796081U CN202260450U (en) | 2011-09-30 | 2011-09-30 | Thermal-electric plant boiler high-pressure fan online power frequency/frequency conversion operation switch device |
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| Publication Number | Publication Date |
|---|---|
| CN202260450U true CN202260450U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203796081U Expired - Lifetime CN202260450U (en) | 2011-09-30 | 2011-09-30 | Thermal-electric plant boiler high-pressure fan online power frequency/frequency conversion operation switch device |
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| Country | Link |
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| CN (1) | CN202260450U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051282A (en) * | 2012-08-23 | 2013-04-17 | 上海外高桥第二发电有限责任公司 | Variable-frequency and industrial frequency switching device and switching method of Variable-frequency and industrial frequency switching device |
| CN103047166A (en) * | 2013-01-21 | 2013-04-17 | 江苏力普电子科技有限公司 | Blower control system during power frequency/frequency conversion switching of high-voltage frequency converter |
| CN103334913A (en) * | 2013-07-25 | 2013-10-02 | 河南省通信电缆有限公司 | Control system of air compressor |
| CN105490616A (en) * | 2016-01-11 | 2016-04-13 | 宁波中金石化有限公司 | Circuit structure for boiler blower capable of automatically switching to power frequency from variable frequency |
| CN106499654A (en) * | 2016-10-28 | 2017-03-15 | 山东电力建设第工程公司 | The testing program of the automatic cut frequency of Large-scale machine set primary air fan frequency conversion |
| CN108266398A (en) * | 2017-01-03 | 2018-07-10 | 新疆知信科技有限公司 | Stable operation method during primary air fan frequency conversion cut frequency |
| CN109519362A (en) * | 2018-11-14 | 2019-03-26 | 珠海格力电器股份有限公司 | Control method, device, controller and the storage medium of motor device |
| CN112615571A (en) * | 2020-12-08 | 2021-04-06 | 西安热工研究院有限公司 | Frequency conversion and power frequency switching control method for induced draft fan of garbage power plant |
| CN113027802A (en) * | 2021-05-11 | 2021-06-25 | 西安热工研究院有限公司 | Power frequency switching method for fault state of frequency converter of centrifugal fan of power station |
-
2011
- 2011-09-30 CN CN2011203796081U patent/CN202260450U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051282A (en) * | 2012-08-23 | 2013-04-17 | 上海外高桥第二发电有限责任公司 | Variable-frequency and industrial frequency switching device and switching method of Variable-frequency and industrial frequency switching device |
| CN103047166A (en) * | 2013-01-21 | 2013-04-17 | 江苏力普电子科技有限公司 | Blower control system during power frequency/frequency conversion switching of high-voltage frequency converter |
| CN103334913A (en) * | 2013-07-25 | 2013-10-02 | 河南省通信电缆有限公司 | Control system of air compressor |
| CN105490616A (en) * | 2016-01-11 | 2016-04-13 | 宁波中金石化有限公司 | Circuit structure for boiler blower capable of automatically switching to power frequency from variable frequency |
| CN106499654A (en) * | 2016-10-28 | 2017-03-15 | 山东电力建设第工程公司 | The testing program of the automatic cut frequency of Large-scale machine set primary air fan frequency conversion |
| CN106499654B (en) * | 2016-10-28 | 2018-05-18 | 山东电力建设第一工程公司 | The testing program of the automatic cutting frequency of Large-scale machine set primary air fan frequency conversion |
| CN108266398A (en) * | 2017-01-03 | 2018-07-10 | 新疆知信科技有限公司 | Stable operation method during primary air fan frequency conversion cut frequency |
| CN109519362A (en) * | 2018-11-14 | 2019-03-26 | 珠海格力电器股份有限公司 | Control method, device, controller and the storage medium of motor device |
| CN109519362B (en) * | 2018-11-14 | 2019-10-29 | 珠海格力电器股份有限公司 | Control method, device, controller and the storage medium of motor device |
| CN112615571A (en) * | 2020-12-08 | 2021-04-06 | 西安热工研究院有限公司 | Frequency conversion and power frequency switching control method for induced draft fan of garbage power plant |
| CN113027802A (en) * | 2021-05-11 | 2021-06-25 | 西安热工研究院有限公司 | Power frequency switching method for fault state of frequency converter of centrifugal fan of power station |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120530 |