CN209557046U - A kind of cogeneration unit off-grid speed limit half-wave control device - Google Patents
A kind of cogeneration unit off-grid speed limit half-wave control device Download PDFInfo
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- CN209557046U CN209557046U CN201822142665.2U CN201822142665U CN209557046U CN 209557046 U CN209557046 U CN 209557046U CN 201822142665 U CN201822142665 U CN 201822142665U CN 209557046 U CN209557046 U CN 209557046U
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Abstract
The utility model discloses a kind of cogeneration unit off-grid speed limit half-wave control devices, including steam turbine, automatic off-grid single machine signal pickup assembly, turbine speed waveform tracking recording device, turbine speed controller, steam turbine electrohydraulic regulator, steam turbine oil pulse control regulating device and time control oil pressure speed regulator.The utility model implements control immediately by the preceding half-wave to first revolving speed wave band after load dump, turbine speed fluctuating range is effectively reduced, it avoids fluctuating widely, 505 regulating systems is enable to reach new balance as early as possible, to ensure the steady single-unit operation of Turbine Safety.
Description
Technical field
The utility model relates to a kind of cogeneration unit off-grid speed limit half-wave control devices.
Background technique
Currently, cogeneration unit generally realizes the automatic adjustment and control to generating set using 505 regulating systems.
Steam turbine electrohydraulic regulator (CPC) is a very important link in 505 regulating systems, can be real by the control of CPC
It is existing: to control steam turbine load under grid connection state；It can control turbine speed under off-grid state.Sulfate system cogeneration
Unit is in operation, some is used generation load for in-plant equipment facility, and extra electricity is then sent to outside line power grid.When outer
Line power grid break down etc. abnormal electric power thus supplied when, generating set will automatic off-grid single-unit operation, steam turbine will be immediately at this time
Get rid of except our factory's device and with device power load in addition to extra load, just can guarantee the even running of entire process units,
If extra load cannot be got rid of in time, turbine speed will rapidly rise, and protect after the egulation rotating speed more than steam turbine setting
Device action, which will lead to full factory and shut down, to have a power failure (if steam turbine protection device is failure to actuate, it would be possible to lead to the runaway accident that exceeds the speed limit), leads
Automatic off-grid single-unit operation is caused to fail.Way conventional at present is exactly single-unit operation again after the artificial load of reduction in advance, thus
The case where there is no load dumps, but abnormal electrical power supply situation is often unpredictable, it is necessary to system is adjusted by 505
The processor of system is adjusted according to speed feedback signal automated closed-loop, is adjusted automatically after automatic off-grid single machine according to load condition
Air inflow is saved, so that controlling turbine speed reaches stable.
Cogeneration unit can repeatedly encounter the case where outside line power grid breaks down in operation in 1 year.Work as steam turbine
The moment of automatic off-grid is carried out, if removal of load amount is bigger, turbine speed can rapidly rise moment, and 505 regulating systems
Control set for adjusting due to use PID closed-loop control, there are certain hysteresis qualitys for itself, and off-grid moment revolving speed substantially
Feedback control signal can also be sharply increased in raised situation, will result in the oscillation on large scale situation of turbine speed, need compared with
The long time can be only achieved new equilibrium state, or even cannot reach when equilibrium state earthquake amplitude is more than critical value and directly join
Locking machine, so that unit off-grid single-unit operation be easy to cause to fail.The failure of off-grid will lead to whole process units in factory and have a power failure
Shut down, direct economic loss number is larger, indirect loss be even more can not estimate (due to having a power failure in factory, various pumps and blower in factory
Will be out of service, the equipment that must cool down or carry out other reactions will be in a dangerous operating condition, it will equipment is caused to use the longevity
Life shortens, or even directly scraps).So must improve to steam turbine control system, the quick change of load can be adapted to
Change, and enables unit even running.
Utility model content
In view of the above-mentioned problems, the utility model provides a kind of cogeneration unit off-grid speed limit half-wave control device, pass through
Immediately control is implemented to the preceding half-wave (i.e. high specified speed stage) of first revolving speed wave band after load dump, is effectively reduced
Turbine speed fluctuating range avoids fluctuating widely, and 505 regulating systems is enable to reach new balance as early as possible, to ensure
The steady single-unit operation of Turbine Safety.
To achieve the above object, the technical solution of the utility model is:
A kind of cogeneration unit off-grid speed limit half-wave control device, including steam turbine, automatic off-grid single machine signal acquisition
Device, turbine speed waveform tracking recording device, turbine speed controller, steam turbine electrohydraulic regulator, steam turbine oil arteries and veins
Rush controling adjustment device and time control oil pressure speed regulator, the output end and time control oil pressure of automatic off-grid single machine signal pickup assembly
Speed regulator connection, the input terminal of turbine speed waveform tracking recording device connect with steam turbine, output end and when oil-control
Speed regulator connection is pressed, the input terminal of turbine speed controller is connect with steam turbine, and output end and steamer mechanical electronic hydraulic are adjusted
The input terminal of device connects, and the output end of steam turbine electrohydraulic regulator and the input terminal of steam turbine oil pulse control regulating device connect
Connect, the output end of steam turbine oil pulse control regulating device is connect with steam turbine, the output end of time control oil pressure speed regulator with
The input terminal of steam turbine oil pulse control regulating device connects.
When operation, turbine speed controller, steam turbine electrohydraulic regulator and steam turbine oil pulse control regulating device are
505 regulating system component parts, when the abnormal electrical power supplies situations such as outside line power grid failure carry out automatic off-grid single-unit operation, when
The on-off state signal and voltage and current that oil-control presses speed regulator to be acquired according to automatic off-grid single machine signal pickup assembly are believed
Number and turbine speed waveform tracking recording device records fluctuation of speed data, adjusted by steam turbine oil pulse control
Device carries out tracking speed limit control to the preceding half-wave of first cycle of high regime after steam turbine single machine, limits preceding half of wave of high regime
The revolving speed of section, is effectively reduced turbine speed fluctuating range, 505 regulating systems is enable to reach new balance as early as possible, to protect
Hinder the steady single-unit operation of Turbine Safety.
The utility model compared with prior art, the beneficial effect is that:
1, cogeneration unit automatic off-grid single-unit operation in abnormal electrical power supplies such as outside line electric network faults has been ensured
Success rate reduces process units machine stop times, improves the process units utilization of capacity.
2, it effectively controls revolving speed of the steam turbine in off-grid single-unit operation moment sharply to increase and fluctuate widely, improve
The safety in operation and stability of steam turbine.
3, remarkable in economical benefits, application prospect is boundless, every year can for enterprise save economic loss up to 1,000,000 yuan with
On, market promotion prospect is very good.
Detailed description of the invention
Fig. 1 is the principles of the present invention block diagram.
Specific embodiment
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing and have
Body embodiment is described in further detail the utility model.
As shown in Figure 1, a kind of cogeneration unit off-grid speed limit half-wave control device, including steam turbine 1, automatic off-grid list
Machine signal pickup assembly 2, turbine speed waveform tracking recording device 3, turbine speed controller 4, steamer mechanical electronic hydraulic are adjusted
Device 5, steam turbine oil pulse control regulating device 6 and time control oil pressure speed regulator 7.Automatic off-grid single machine signal pickup assembly 2
For acquiring the various on-off state signals and voltage and current signal of generator off-grid single machine.Turbine speed waveform tracking note
Recording device 3 is the matched monitoring device of unit, turbine speed controller 4, steam turbine electrohydraulic regulator 5 and steam turbine oil pulse
Controling adjustment device 6 is the component part of 505 regulating systems.
The output end of automatic off-grid single machine signal pickup assembly 2 is connect with time control oil pressure speed regulator 7, turbine speed
The input terminal of waveform tracking recording device 3 is connect with steam turbine 1, and output end is connect with time control oil pressure speed regulator 7, steam turbine
The input terminal of rotational speed governor 4 is connect with steam turbine 1, and output end is connect with the input terminal of steam turbine electrohydraulic regulator 5, steam turbine
The output end of electrohydraulic regulator 5 is connect with the input terminal of steam turbine oil pulse control regulating device 6, steam turbine oil pulse control tune
The output end of regulating device 6 is connect with steam turbine 1, the output end and steam turbine oil pulse control tune of time control oil pressure speed regulator 7
The input terminal of regulating device 6 connects.
The working principle of time control oil pressure speed setting unit 7 is attempted by steamer by pipeline with steam turbine electrohydraulic regulator 5
On the CPC outlet pulses oil pipeline that mechanical electronic hydraulic adjuster 5 exports, then pass through pipeline and 8 phase of oil system oil return processing unit
Even, a circuit is constituted, is carried out by preceding half-wave of the reasonable parameter setting to first cycle of high regime after 1 single machine of steam turbine
Control for Speed Limitation is tracked, so that 1 revolving speed of steam turbine is reached new equilibrium state as early as possible, meets the requirement of safe and stable operation.
When operation, when outside line power grid break down etc. abnormal electrical power supplies situation carry out automatic off-grid single-unit operation when, when oil-control
On-off state signal and voltage and current signal that pressure speed regulator 7 is acquired according to automatic off-grid single machine signal pickup assembly 2,
And the fluctuation of speed data that turbine speed waveform tracking recording device 3 records, it is adjusted and is filled by steam turbine oil pulse control
The preceding half-wave for setting first cycle of high regime after 6 pairs of 1 single machines of steam turbine carries out tracking speed limit control, limits preceding half of wave of high regime
The revolving speed of section, is effectively reduced 1 fluctuation of speed amplitude of steam turbine, so that 505 regulating systems is reached new balance as early as possible, to protect
Hinder 1 safety and steady single-unit operation of steam turbine.
Above-listed detailed description is illustrating for the utility model possible embodiments, and the embodiment is not to limit
The scope of the patents of the utility model, all equivalence enforcements or change without departing from carried out by the utility model, is intended to be limited solely by this case
In the scope of the patents.
Claims (1)
1. a kind of cogeneration unit off-grid speed limit half-wave control device, it is characterised in that: including steam turbine (1), automatic off-grid
Single machine signal pickup assembly (2), turbine speed waveform tracking recording device (3), turbine speed controller (4), steam turbine
Electrohydraulic regulator (5), steam turbine oil pulse control regulating device (6) and time control oil pressure speed regulator (7), automatic off-grid single machine
The output end of signal pickup assembly (2) is connect with time control oil pressure speed regulator (7), turbine speed waveform tracking recording device
(3) input terminal is connect with steam turbine (1), and output end is connect with time control oil pressure speed regulator (7), turbine speed controller
(4) input terminal is connect with steam turbine (1), and output end is connect with the input terminal of steam turbine electrohydraulic regulator (5), steamer mechanical electronic hydraulic
The output end of adjuster (5) is connect with the input terminal of steam turbine oil pulse control regulating device (6), steam turbine oil pulse control tune
The output end of regulating device (6) is connect with steam turbine (1), the output end of time control oil pressure speed regulator (7) and steam turbine oil pulse
The input terminal of controling adjustment device (6) connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822142665.2U CN209557046U (en) | 2018-12-19 | 2018-12-19 | A kind of cogeneration unit off-grid speed limit half-wave control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822142665.2U CN209557046U (en) | 2018-12-19 | 2018-12-19 | A kind of cogeneration unit off-grid speed limit half-wave control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209557046U true CN209557046U (en) | 2019-10-29 |
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ID=68303141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822142665.2U Active CN209557046U (en) | 2018-12-19 | 2018-12-19 | A kind of cogeneration unit off-grid speed limit half-wave control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209557046U (en) |
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2018
- 2018-12-19 CN CN201822142665.2U patent/CN209557046U/en active Active
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