CN102661283B - Power frequency and variable frequency mixed working condition power station fan RB control system and control method thereof - Google Patents
Power frequency and variable frequency mixed working condition power station fan RB control system and control method thereof Download PDFInfo
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- CN102661283B CN102661283B CN201210147574.2A CN201210147574A CN102661283B CN 102661283 B CN102661283 B CN 102661283B CN 201210147574 A CN201210147574 A CN 201210147574A CN 102661283 B CN102661283 B CN 102661283B
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Abstract
The invention discloses a power frequency and variable frequency mixed working condition power station fan RB control system and control method thereof. A parameter deviation generator is in communication connection with an adjustment controller I and an adjustment controller II, the adjustment controller I and the adjustment controller II are in communication connection with each other, the adjustment controller I and the adjustment controller II are in communication connection with a control output selector, the control output selector is in communication connection with a balance output block, and the balance output block is in communication connection with a fan baffle actuator 1 and a fan speed-regulation actuator 2; the RB control system also comprises a fan operating state recognizer, and the fan operating state recognizer is in communication connection with the adjustment controller I, the adjustment controller II, the control output selector, an alarm display and an RB generation recognizer respectively; and the RB generation recognizer is in communication connection with the alarm display. The invention also discloses a control method of the RB control system. With the invention, the automatic control system of a generating set is improved and optimized, the RB success rate of the generating set is improved, and the safety production and operation of the generating set is guaranteed.
Description
Technical field
The present invention relates to a kind of control system and controlling method, power station fan RB control system and controlling method thereof under the mixed operating mode of especially a kind of power frequency frequency conversion.
Background technique
Thermal power generation unit accounts for the critical role of China's electrical production, and gas fan in electric power station system, induced draught fan, primary air fan power loss are larger, how to reduce its energy consumption, are the important topics that power station fan optimization improves.Along with the maturation of large-size variable-frequency device technology, many fired power generating unit are in technical innovation, all these highly energy-consuming system reforms are installed additional to frequency converting and energy saving device, by original baffle plate throttling control mode, transform the energy-conservation frequency conversion step-less adjustment method of operation as, reduce operating restriction loss on the one hand, reduced motor operating current, played desirable energy-conserving action; Improve on the other hand heavy-duty motor inrush current shock problem, realized large motor smooth starting.
The advantage of power station fan Frequency Conversion Modification is energy-saving and cost-reducing, but simultaneously also the automatic control of fan brought larger change.Due to frequency variator self or system defect, often occur that frequency conversion fault exits, transfer power frequency bypass operation to, so just occur that power frequency operation baffle plate of two Fans regulates operation, another frequency conversion rotational speed regulation operation, and baffle plate regulates and two kinds of control modes of rotational speed regulation, regulating and controlling characteristic difference, in the time that unit normally moves, pass through algorithm compensation, can realize two kinds of regulative modes and coexist, but there is the operating mode sudden changes such as RB during when unit, existing control program is difficult to meet system requirements.
Power station large fan, as induced draught fan, gas fan, primary air fan, configuration generally takes symmetrical two tablecloths to put, separate unit blower fan is exerted oneself and is generally designed in 60% left and right of unit maximum output demand, and while normally operation, two Fans balances are exerted oneself, in the time of separate unit fan trouble, unit needs fast load shedding, under separate unit blower fan is exerted oneself operating mode, set up new system balancing as early as possible, maintain unit smooth running, this process is unit RB technology.
Summary of the invention
The power frequency operation baffle plate of two Fans that the object of the invention is to be arranged symmetrically with in the electric power station system for overcoming above-mentioned prior art regulates operation, under another frequency conversion rotational speed regulation operating conditions, while there is RB in unit, power frequency operation blower fan and the inconsistent problem of converting operation Fan Equipment control characteristic, power station fan RB control system and controlling method thereof under the mixed operating mode of a kind of power frequency frequency conversion is provided, it has improved optimization machine unit automatic control system, improve unit RB success rate, ensure the safety in production operation of generator set.
For achieving the above object, the present invention adopts following technical proposals:
Power station fan RB control system under the mixed operating mode of a kind of power frequency frequency conversion, comprise parameter error generator, described parameter error generator is communicated by letter and is connected with adjusting color controls II with adjusting color controls I respectively, adjusting color controls I is connected with the intercommunication of adjusting color controls II, adjusting color controls I all communicates by letter and is connected with control outlet selector with adjusting color controls II, control outlet selector and communicate by letter and be connected with balance IOB, balance IOB is communicated by letter and is connected with #2 fan speed regulation final controlling element with #1 blower fan baffle plate final controlling element respectively; Described system also comprises fan operation state identifier, and fan operation state identifier is communicated by letter and is connected with adjusting color controls I, adjusting color controls II, control outlet selector, alarm display and RB generation recognizer respectively; Recognizer occurs RB, and communication is connected with alarm display.
A controlling method of utilizing power station fan RB control system under the mixed operating mode of power frequency frequency conversion, in the time that RB occurs system, working procedure is as follows:
A) whether RB generation recognizer moves according to unit operation load, two Fans, and identification judges that RB occurs, and transmits fan operation state identifier and alarm display by signal; Alarm display completes alarm indication, prompting unit operations staff, and RB occurs;
B) the RB generation signal formation RB mode that fan operation state identifier is frequency conversion or power frequency and RB generation recognizer according to operation blower fan is selected signal, send adjusting color controls I, adjusting color controls II, controls outlet selector; Fan operation state is sent alarm display finishing stage to show simultaneously;
If it is that converting operation fan trouble stops that the RB mode that c) fan operation state identifier is sent is selected signal, power frequency blower fan keeps operation, control outlet selector and select adjusting color controls I output to export and deliver on #1 blower fan baffle plate final controlling element by balance IOB as control command, complete power frequency operation blower fan baffle controls; The now output of adjusting color controls II, from the output value of motion tracking adjusting color controls I, ensures that two controller output unperturbeds switch;
If it is that power frequency operation fan trouble stops that the RB mode that d) fan operation state identifier is sent is selected signal, frequency conversion fan keeps operation, adjusting color controls II switches to automatic adjustment state from tracking mode, control outlet selector simultaneously and select the output of adjusting color controls II to export and deliver on #2 fan speed regulation final controlling element piece by balance IOB as control command, complete the control of converting operation fan speed regulation; Now adjusting color controls I switches to tracking mode by regulating to control, and output, from the output value of motion tracking adjusting color controls II, ensures that two controller output unperturbeds switch.
Each functions of modules is as follows:
Parameter error generator, according to pre-set parameter, with unit operation parameter is poor in real time, controlled deviation, is input to adjusting color controls I and adjusting color controls II.
Adjusting color controls I, mainly completes power frequency baffle controls process after the normal operation of blower fan and RB.
Adjusting color controls II3, mainly completes variable frequency regulating speed control process after blower fan RB.
Control outlet selector, select the output of adjusting color controls I or adjusting color controls II according to operation fan condition.
Balance IOB, completes the command assignment of output order to two Fans.
Fan operation state identifier, completes two Fans running state recognitions.
Alarm display, shows that RB occurs to report to the police and fan operation state.
There is recognizer in RB, signal, gas fan running state recognition device and alarm display occur identification blower fan RB.
#1 blower fan baffle plate final controlling element, controls the action of blower fan baffle plate.
#2 fan speed regulation final controlling element, controls rotation speed of fan lifting.
The present invention completes automatic adjusting by a controller while adopting unit two Fans operation; and RB occur time; according to the control characteristic difference of operation Fan Equipment; realize automatic unperturbed and switch different controller output; stable system Operational Limits; improve unit RB success rate, reduce unit disorderly closedown number of times.
When unit two Fans operation, mainly controlled parameter and Operational Limits deviation by adjusting color controls I according to system and calculated the control deviation that parameter error generator obtains, completing automatic adjusting calculates, by controlling outlet selector and balance IOB, control command is delivered on #1 blower fan baffle plate final controlling element and #2 fan speed regulation final controlling element device, realized the automatic control of blower fan.
If it is that converting operation fan trouble stops that the RB mode that fan operation state identifier is sent is selected signal, power frequency blower fan keeps operation, control outlet selector and select adjusting color controls I output to export and deliver on #1 blower fan baffle plate final controlling element by balance IOB as control command, complete power frequency operation blower fan baffle controls; The now output of adjusting color controls II, from the output value of motion tracking adjusting color controls I, ensures that two controller output unperturbeds switch.
While the invention solves power station fan one side variable frequency regulating speed control operation, a side power frequency baffle controls operating conditions, there is RB in unit, under blower fan different running method, the inconsistent problem of equipment control characteristic, improve optimization machine unit automatic control system, improve unit RB success rate, ensure the safety in production operation of generator set.
Brief description of the drawings
Fig. 1 is System Construction schematic diagram of the present invention;
Wherein 1. parameter error generators, 2. adjusting color controls I, 3. adjusting color controls II, 4. controls outlet selector, 5. balance IOB, 6. fan operation state identifier, 7. alarm display, there is recognizer in 8.RB, 9.#1 blower fan baffle plate final controlling element, 10.#2 fan speed regulation final controlling element.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
As shown in Figure 1, power station fan RB control system under the mixed operating mode of power frequency frequency conversion, comprise parameter error generator 1,3 communications are connected described parameter error generator 1 with adjusting color controls II with adjusting color controls I 2 respectively, adjusting color controls I 2 is connected with the intercommunication of adjusting color controls II 3, adjusting color controls I 2 is all connected with 4 communications of control outlet selector with adjusting color controls II 3, control outlet selector 4 and be connected with 5 communications of balance IOB, 10 communications are connected balance IOB 5 with #2 fan speed regulation final controlling element with #1 blower fan baffle plate final controlling element 9 respectively; Described system also comprises fan operation state identifier 6, and fan operation state identifier 6 with adjusting color controls I 2, adjusting color controls II 3, control outlet selector 4, alarm display 7 and RB, recognizer 8 communications occurs respectively and is connected; Recognizer 8 occurs RB, and 7 communications are connected with alarm display.
Each functions of modules is as follows:
Parameter error generator 1, according to pre-set parameter, with unit operation parameter is poor in real time, controlled deviation, is input to adjusting color controls I 2 and adjusting color controls II3.
Adjusting color controls I 2, mainly completes power frequency baffle controls process after the normal operation of blower fan and RB.
Adjusting color controls II 3, mainly completes variable frequency regulating speed control process after blower fan RB.
Control outlet selector 4, select the output of adjusting color controls I 2 or adjusting color controls II3 according to operation fan condition.
Balance IOB 5, completes the command assignment of output order to two Fans.
Fan operation state identifier 6, completes two Fans running state recognitions.
Alarm display 7, shows that RB occurs to report to the police and fan operation state.
There is recognizer 8 in RB, signal, gas fan running state recognition device 6 and alarm display 7 occur identification blower fan RB.
#1 blower fan baffle plate final controlling element 9, controls the action of blower fan baffle plate.
#2 fan speed regulation final controlling element 10, controls rotation speed of fan lifting.
A kind of controlling method of utilizing power station fan RB control system under the mixed operating mode of power frequency frequency conversion, in the time that RB occurs system, working procedure is following, and (with #1 blower fan power frequency operation, #2 fan frequency conversion operates to example explanation, the same operation of #1 fan frequency conversion, the #2 blower fan power frequency operating conditions of being suitable for):
A) whether RB generation recognizer 8 moves according to unit operation load, two Fans, and identification judges that RB occurs, and transmits fan operation state identifier 6 and alarm display 7 by signal; Alarm display 7 completes alarm indication, prompting unit operations staff, and RB occurs;
B) the RB generation signal formation RB mode that fan operation state identifier 6 is frequency conversion or power frequency and RB generation recognizer 8 according to operation blower fan is selected signal, send adjusting color controls I 2, adjusting color controls II 3, controls outlet selector 4; Fan operation state is sent alarm display 7 finishing stagees to show simultaneously;
If it is that converting operation fan trouble stops that the RB mode that c) fan operation state identifier 6 is sent is selected signal, power frequency blower fan keeps operation, controlling outlet selector 4 selects adjusting color controls I 2 to export as control command output to deliver on #1 blower fan baffle plate final controlling element 9 by balance IOB 5, complete power frequency operation blower fan baffle controls; The now output of adjusting color controls II 3, from the output value of motion tracking adjusting color controls I 2, ensures that two controller output unperturbeds switch;
If it is that power frequency operation fan trouble stops that the RB mode that d) fan operation state identifier 6 is sent is selected signal, frequency conversion fan keeps operation, adjusting color controls II 3 switches to automatic adjustment state from tracking mode, control outlet selector 4 simultaneously and select the output of adjusting color controls II 3 to export and deliver on #2 fan speed regulation final controlling element piece 10 by balance IOB 5 as control command, complete the control of converting operation fan speed regulation; Now adjusting color controls I 2 switches to tracking mode by regulating to control, and output, from the output value of motion tracking adjusting color controls II 3, ensures that two controller output unperturbeds switch.
The present invention completes automatic adjusting by a controller while adopting unit two Fans operation; and RB occur time; according to the control characteristic difference of operation Fan Equipment; realize automatic unperturbed and switch different controller output; stable system Operational Limits; improve unit RB success rate, reduce unit disorderly closedown number of times.
When unit two Fans operation, mainly controlled parameter and Operational Limits deviation by adjusting color controls I 2 according to system and calculated the control deviation that parameter error generator obtains, completing automatic adjusting calculates, by controlling outlet selector and balance IOB, control command is delivered on #1 blower fan baffle plate final controlling element 9 and #2 fan speed regulation final controlling element 10, realized the automatic control of blower fan.
If it is that converting operation fan trouble stops that the RB mode that fan operation state identifier is sent is selected signal, power frequency blower fan keeps operation, control outlet selector and select adjusting color controls I output to export and deliver on #1 blower fan baffle plate final controlling element by balance IOB as control command, complete power frequency operation blower fan baffle controls; The now output of adjusting color controls II 3, from the output value of motion tracking adjusting color controls I 2, ensures that two controller output unperturbeds switch.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technological scheme of the present invention, those skilled in the art do not need to pay various amendments that creative work can make or distortion still in protection scope of the present invention.
Claims (2)
1. power station fan RB control system under the mixed operating mode of power frequency frequency conversion, when described RB refers to normal operation, two Fans balances are exerted oneself, in the time of separate unit fan trouble, unit needs fast load shedding, under exerting oneself operating mode, separate unit blower fan sets up new system balancing as early as possible, maintain unit smooth running, this process is the RB of unit, it is characterized in that, described system comprises parameter error generator, described parameter error generator is communicated by letter and is connected with adjusting color controls II with adjusting color controls I respectively, adjusting color controls I is connected with the intercommunication of adjusting color controls II, adjusting color controls I all communicates by letter and is connected with control outlet selector with adjusting color controls II, controlling outlet selector communicates by letter and is connected with balance IOB, balance IOB is communicated by letter and is connected with #2 fan speed regulation final controlling element with #1 blower fan baffle plate final controlling element respectively, described system also comprises fan operation state identifier, and fan operation state identifier is communicated by letter and is connected with adjusting color controls I, adjusting color controls II, control outlet selector, alarm display and RB generation recognizer respectively, recognizer occurs RB, and communication is connected with alarm display.
2. a controlling method of utilizing the control system described in claim 1, is characterized in that, in the time that RB occurs system, working procedure is as follows:
A) whether RB generation recognizer moves according to unit operation load, two Fans, and identification judges that RB occurs, and transmits fan operation state identifier and alarm display by signal; Alarm display completes alarm indication, prompting unit operations staff, and RB occurs;
B) the RB generation signal formation RB mode that fan operation state identifier is frequency conversion or power frequency and RB generation recognizer according to operation blower fan is selected signal, send adjusting color controls I, adjusting color controls II and controls outlet selector; Fan operation state is sent alarm display finishing stage to show simultaneously;
If it is that converting operation fan trouble stops that the RB mode that c) fan operation state identifier is sent is selected signal, power frequency blower fan keeps operation, control outlet selector and select adjusting color controls I output to export and deliver on #1 blower fan baffle plate final controlling element by balance IOB as control command, complete power frequency operation blower fan baffle controls; The now output of adjusting color controls II, from the output value of motion tracking adjusting color controls I, ensures that two controller output unperturbeds switch;
If it is that power frequency operation fan trouble stops that the RB mode that d) fan operation state identifier is sent is selected signal, frequency conversion fan keeps operation, adjusting color controls II switches to automatic adjustment state from tracking mode, control outlet selector simultaneously and select the output of adjusting color controls II to export and deliver on #2 fan speed regulation final controlling element piece by balance IOB as control command, complete the control of converting operation fan speed regulation; Now adjusting color controls I switches to tracking mode by regulating to control, and output, from the output value of motion tracking adjusting color controls II, ensures that two controller output unperturbeds switch.
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| CN201210147574.2A CN102661283B (en) | 2012-05-14 | 2012-05-14 | Power frequency and variable frequency mixed working condition power station fan RB control system and control method thereof |
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| CN104141964B (en) * | 2014-04-22 | 2016-06-08 | 上海金自天正信息技术有限公司 | Industrial furnace supply air system and method |
| CN105258106B (en) * | 2015-11-04 | 2017-07-14 | 中国神华能源股份有限公司 | The shared load of feed pump subtracts system and method soon between a kind of different units unit |
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| JPH11287403A (en) * | 1998-04-01 | 1999-10-19 | Mitsubishi Heavy Ind Ltd | Run back control method for boiler and control circuit therefor |
| JP4406908B2 (en) * | 2006-09-11 | 2010-02-03 | 喜夫 関根 | Load setter follow-up type, boiler, turbine parallel control runback control system |
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| CN101650021A (en) * | 2009-08-25 | 2010-02-17 | 广州粤能电力科技开发有限公司 | Primary air fan tripping set run back control method and system |
| CN201772437U (en) * | 2010-07-29 | 2011-03-23 | 上海威钢能源有限公司 | Furnace hearth negative pressure control system with inconsistent variable rotational speed driving property of induced draft fan |
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| "300MW机组RB控制设计及试验";曲广浩等;《热力发电》;20060815(第8期);第42-44页 * |
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Effective date of registration: 20220207 Address after: 250003 No. 2000, Wang Yue Road, Shizhong District, Ji'nan, Shandong Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER Co. Patentee after: STATE GRID CORPORATION OF CHINA Address before: 250003 No. 2000, Wang Yue Road, Shizhong District, Ji'nan, Shandong Patentee before: SHANDONG ELECTRIC POWER Research Institute Patentee before: STATE GRID CORPORATION OF CHINA |