CN107061132B - A kind of power station governor power closed-loop adjustment improves the regulating system of power regulation speed and degree of regulation - Google Patents
A kind of power station governor power closed-loop adjustment improves the regulating system of power regulation speed and degree of regulation Download PDFInfo
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- CN107061132B CN107061132B CN201611162477.5A CN201611162477A CN107061132B CN 107061132 B CN107061132 B CN 107061132B CN 201611162477 A CN201611162477 A CN 201611162477A CN 107061132 B CN107061132 B CN 107061132B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B15/00—Controlling
- F03B15/02—Controlling by varying liquid flow
- F03B15/04—Controlling by varying liquid flow of turbines
- F03B15/06—Regulating, i.e. acting automatically
- F03B15/08—Regulating, i.e. acting automatically by speed, e.g. by measuring electric frequency or liquid flow
- F03B15/12—Regulating, i.e. acting automatically by speed, e.g. by measuring electric frequency or liquid flow with retroactive action
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/16—Stators
- F03B3/18—Stator blades; Guide conduits or vanes, e.g. adjustable
- F03B3/183—Adjustable vanes, e.g. wicket gates
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
A kind of power station governor power closed-loop adjustment provided by the invention improves the regulating system of power regulation speed and degree of regulation；Including monitoring system, control unit and governor；The power regulation functions that the present invention is had using speed regulator system itself, the direct action mechanism adjusted in view of governor as the power of the assembling unit, its governing response speed and degree of regulation are superior to monitoring and adjust, therefore governor is run using power mode, load setting is gone out mode by mould by monitoring LCU to send to governor, power closed loop is formed in governor, the power of the assembling unit is completed by governor to adjust, eliminate the defect that power is out-of-limit or regulated quantity is inadequate as caused by head difference during primary frequency modulation movement, governor power closed-loop adjustment avoids regulating command when monitoring closed loop is adjusted and need to convert by multiple tracks, improve power regulation speed and degree of regulation, it avoids and is examined because regulations speed is unsatisfactory for grid requirements, improve enterprise's generating efficiency.
Description
Technical field
The present invention relates to the tune that a kind of power station governor power closed-loop adjustment improves power regulation speed and degree of regulation
Section system.
Background technique
Since mains frequency fluctuation is frequent, so governor enters primary frequency modulation also very frequently, primary frequency modulation and power
What is adjusted is conflicting, is easy to induce unit load fluctuation, what primary frequency modulation will lead to during acting due to head difference
Power is out-of-limit or regulated quantity is inadequate.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of power station governor power closed-loop adjustments to improve power tune
Save the regulating system of speed and degree of regulation.
The present invention is achieved by the following technical programs.
A kind of power station governor power closed-loop adjustment provided by the invention improves power regulation speed and degree of regulation
Regulating system；Including monitoring system, control unit and governor；
The monitoring system receives AGC receiver port and manual operation panel, and the signal received is transferred to control
Unit processed；
Described control unit receives the regulating command that monitoring system issues, and converts analog quantity for order and is handed down to speed regulation control
Device processed, while the power value signal for also receiving speed setting controller feedback is transferred to monitoring system；
The analog quantity of the governor reception control unit simultaneously carries out PID adjusting processing, then adjusts guide vanes of water turbine
Aperture, and guide vane opening is fed back into control unit.
The governor enables power regulation mode and retains former aperture mode, and operations staff selects to adjust mould as needed
Formula is aperture regulation or power regulation, and monitoring system is sent out corresponding control signal to governor according to the regulative mode of selection and controlled
Device, governor controller switch between power regulation mode and aperture regulation mode according to monitor command.
Governor power target value is that power gives and the primary frequency modulation amount of superposition under the power regulation mode；Frequency departure
Dead zone, it is real to send out the amount of superposition that power is power given value and primary frequency modulation actuating quantity；Frequency returns in dead zone, and real power of sending out is upper
The given power that position machine issues responds the instruction variation of AGC.
Governor monitoring system under aperture mode persistently sends out given value signal active to governor, and each
Automatically " activation power is given " signal is sent out after set point change to governor so that new setting value comes into force in governor side.It is adjusting
Under fast device power closed-loop adjustment mode, monitoring system, which no longer exports, adjusts pulse signal, is issued by speed regulator system according to monitoring
The active setting of 4 lasting~20mA and active real signal to carry out power closed-loop adjustment.
When power regulation mode frequency modulation movement next time, hair power is that power given value and primary frequency modulation move to unit in fact
Make superposition amount, frequency returns in dead zone, responds the instruction variation of AGC, real power of sending out is that the power that host computer issues is given.
If the given input of power is faulty when the power mode carrying row, governor is automatically cut into aperture mode fortune
Row, monitoring system switch corresponding control mode according to the mode signal of governor.
The beneficial effects of the present invention are: the power regulation functions being had using speed regulator system itself, it is contemplated that speed regulation
The direct action mechanism that device is adjusted as the power of the assembling unit, governing response speed and degree of regulation are superior to monitoring and adjust, therefore
Governor is run using power mode, and load setting is gone out mode by mould by monitoring LCU and is sent to governor, is formed in governor
Power closed loop is completed the power of the assembling unit by governor and is adjusted, and the power as caused by head difference during primary frequency modulation movement is eliminated
Out-of-limit or inadequate regulated quantity defect: governor power closed-loop adjustment avoid monitoring closed loop adjust when regulating command need by
Multiple tracks conversion, improves power regulation speed and degree of regulation, avoids and examined because regulations speed is unsatisfactory for grid requirements,
Improve enterprise's generating efficiency.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is flow chart of the invention；
Fig. 3 power closed-loop adjustment programme diagram of the present invention；
Specific embodiment
Be described further below technical solution of the present invention, but claimed range be not limited to it is described.
A kind of power station governor power closed-loop adjustment as shown in Figure 1 and Figure 2 improves power regulation speed and degree of regulation
Regulating system；Including monitoring system, control unit and governor；
The monitoring system receives AGC receiver port and manual operation panel, and the signal received is transferred to control
Unit processed；
Described control unit receives the regulating command that monitoring system issues, and converts analog quantity for order and is handed down to speed regulation control
Device processed, while the power value signal for also receiving speed setting controller feedback is transferred to monitoring system；
The analog quantity of the governor reception control unit simultaneously carries out PID adjusting processing, then adjusts guide vanes of water turbine
Aperture, and guide vane opening is fed back into control unit.
The governor enables power regulation mode and retains former aperture mode, and operations staff selects to adjust mould as needed
Formula is aperture regulation or power regulation, and monitoring system is sent out corresponding control signal to governor according to the regulative mode of selection and controlled
Device, governor controller switch between power regulation mode and aperture regulation mode according to monitor command.In monitoring system
3 impulse types of middle increase output signal, is defined as: governor power regulation is thrown, governor aperture regulation is thrown, power is activated to give
It is fixed.The first two signal is respectively used to the regulative mode of control selections governor, the last one outputs signal for activating governor
Side power given value comes into force.
Governor power target value is that power gives and the primary frequency modulation amount of superposition under the power regulation mode；Frequency departure
Dead zone, it is real to send out the amount of superposition that power is power given value and primary frequency modulation actuating quantity；Frequency returns in dead zone, and real power of sending out is upper
The given power that position machine issues responds the instruction variation of AGC.
Governor monitoring system under aperture mode persistently sends out given value signal active to governor, and each
Automatically " activation power is given " signal is sent out after set point change to governor so that new setting value comes into force in governor side.It is adjusting
Under fast device power closed-loop adjustment mode, monitoring system, which no longer exports, adjusts pulse signal, is issued by speed regulator system according to monitoring
The active setting of 4 lasting~20mA and active real signal to carry out power closed-loop adjustment.Increase by 3 in monitoring system to open into letter
Number, is defined as: governor is in power regulation mode, governor in aperture regulation mode.2 signals are current for showing and judging
The practical adjustments mode of governor.Increase by 1 4~20mA simulated signal in monitoring system, is defined as: the active real hair value of unit.
Signal is exported to speed regulator system for speed regulator system power closed-loop adjustment.
When power regulation mode frequency modulation movement next time, hair power is that power given value and primary frequency modulation move to unit in fact
Make superposition amount, frequency returns in dead zone, responds the instruction variation of AGC, real power of sending out is that the power that host computer issues is given.For with
Primary frequency modulation work is closed, under power closed loop mode, the active setting value for monitoring output only becomes with host computer AGC or artificial setting
Change, do not change with real hair value, primary frequency modulation actuating quantity is superimposed to active setting value dynamic by governor.
If the given input of power is faulty when the power mode carrying row, governor is automatically cut into aperture mode fortune
Row, monitoring system switch corresponding control mode according to the mode signal of governor.For that will not be made when guaranteeing regulative mode switching
At load fluctuation, no matter governor is in aperture regulation mode or power regulation mode, the active duty setting signal of monitoring system
Persistently it is output to speed regulator system.In speed regulator system power failure or in the case where monitor itself active power measurement exception, adjust
Mode automatically switches to aperture regulation mode, and regulative mode is without automatically switching after fault-signal disappears, by operations staff
Optionally manual switching.
Embodiment 1,
1.1 powers of the assembling unit are changed to by monitoring closed loop by governor closed loop, by aperture mode altering are power mould by governor
Formula operation.
1.1.1 the electric parameter changed:
A machine aperture deviation evolution is to proportionality coefficient, before changing: 10, after changing: 20.
B machine aperture deviation evolution is to proportionality coefficient, before changing: 5, after changing: 20.
1.1.2 A owner matches zero point, before changing: 10, after changing: 2610.
1.1.3 B owner matches zero point, before changing: 10, after changing: 2610.
1.1.4 given measurement zero point (newly-increased) of A machine power, after changing: 2480, engineering zero point: 0MW measures gain:
9999, engineering gain: 300
1.1.5 A machine Feedback of Power calibration measurement zero point (newly-increased), after changing: 2019, engineering zero point: 0MW, measurement increase
Benefit: 9999, engineering gain: 342
1.1.6 given measurement zero point (newly-increased) of B machine power, after changing: 2480, engineering zero point: 0MW measures gain:
9999, engineering gain: 300
1.1.7 B machine Feedback of Power calibration measurement zero point (newly-increased), after changing: 2019, engineering zero point: 0MW, measurement increase
Benefit: 9999, engineering gain: 342
1.2 increased modules:
1.2.1 analog quantity converter:
This time increased analog quantity converter model are as follows: T1C3C-V24
Design parameter are as follows:
Input signal: DC4 --- 20mA
Output signal: DC4 --- 20mA
1.2.2 main to match fed power supplies plate:
This time increased master matches fed power supplies template number are as follows: SU10-24D12
Design parameter are as follows:
Input signal: DC4 --- 20mA
Output signal: DC4 --- 20mA
The modification of 1.3 governor internal processes:
Increase by 3 impulse types in monitoring system and output signal, is defined as: throw governor power regulation, throwing governor is opened
Degree is adjusted, activation power is given.The first two signal is respectively used to the regulative mode of control selections governor, the last one outputs letter
Number for activating governor side power given value to come into force.Increase by 3 in monitoring system to open into signal, is defined as: governor is in function
Rate shaping modes, governor are in aperture regulation mode.2 signals are used to show and judge the practical adjustments mould of current governor
Formula.Increase by 1 4~20mA simulated signal in monitoring system, is defined as: the active real hair value of unit.Signal is exported to governor system
System is used for speed regulator system power closed-loop adjustment.Governor DI increase the aperture mode sent by LCU power mode switching command
Activation command is given with power, DO increases frequency mode, aperture mode feedback signal send monitoring LCU；
The 1.4 improved tests of power closed loop:
1.4.1 governor back panel wiring finishes, and has replaced module；Monitoring back panel wiring finishes, and has replaced module；It adjusts
Fast device and monitoring wiring finish, and act through test normal to point.
1.4.2 No. 1 machine governor switch machine time is tested.The available machine time measured is 19.47s, when shutdown
Between be 14.78s, and the tune of the power plant Dong Qing governor switch machine time protect calculate setting valve be respectively 20 ± 1s, 14 ± 1s.Through
No. 1 machine governor switch machine time of overtesting is all satisfied requirement.
1.4.3 the morning on December 27th, 2013, governor carry out static failure simulation test.No. 1 machine tune of testing inspection
Switching of the fast device between power mode and aperture mode, operational mode switching, analog machine frequency broken string, power of alterating and direct current power-off and
Power signal broken string etc..Test result is met the requirements.
1.4.5 15:00 in afternoon on December 27th, 2013 --- 19:50, No. 1 machine governor carry out load test.Test
Have detected switching, the operational mode switching, analog machine when No. 1 machine governor is incorporated into the power networks between power mode and aperture mode
Frequency broken string, power of alterating and direct current power-off and power signal broken string etc..Test result is met the requirements.
1.4.6 governor has carried out the load disturbance under power mode.Test complete load disturbance amount be 10MW,
The test of 20MW, 30MW and 50MW (the Load Regulation step-length of the existing power plant Dong Qing governor is 50MW).Wherein, A machine 50MW is negative
Lotus disturbs the time are as follows: 21.5s, test result meet southern net Load Regulation requirement, and Load Regulation process is steady, without overshoot.
Complete the upset test that load variations amount is 50MW under aperture mode again later.Wherein, the A machine 50MW load disturbance time are as follows:
31.2s, and the load disturbance under power mode is more more stable than under aperture.
1.4.7 No. 1 unit AGC is put into, is exited just in grid-connected load carrying No. 3 units AGC function, by changing
The load of No. 3 units run under " aperture regulation " mode examines the situation of change of No. 1 unit load.Test completes load
Disturbance quantity is the test of 30MW and 50MW.Wherein, the A machine 50MW load disturbance time are as follows: 20.1s, it is negative that test result meets south net
Lotus, which is adjusted, to be required, and Load Regulation process is steady, without overshoot.Completing load variations amount under aperture mode again later is 50MW
Upset test.Wherein, the A machine 50MW load disturbance time are as follows: 30s, and the load disturbance under power mode is more steady than under aperture
It is fixed.
1.4.8 No. 1 unit has carried out under power mode, and unit is risen to test (load increase and decrease step at full capacity by 0 load
A length of 50MW).No. 1 unit under power mode when load up, stablize by Load Regulation, without overshoot, does not send out during test
Now the case where automatic load down.Entire test period is 223.5s.After rising at full capacity, load is smoothly down to 0 again, entire to try
Testing the time is 264.5s.
1.4.9 No. 1 unit has carried out under power mode, and unit is risen to test (load increase and decrease step at full capacity by 0 load
A length of 15MW), in addition completing test of the unit from the increasing of 0 load to 220MW under aperture mode again, (load increases and decreases step-length
15MW and 50MW).All tests are normal, smoothly achieve.There is no abnormal conditions in test.Compare by analysis,
Under power mode, during the on-load of identical step-length, the Load Regulation time of power mode is fast compared with aperture mode, and load
Adjustment process is more stable than aperture regulation.
Claims (6)
1. a kind of power station governor power closed-loop adjustment improves the regulating system of power regulation speed and degree of regulation, feature
It is: including monitoring system, control unit and governor；
The monitoring system receives AGC receiver port and manual operation panel, and it is single that the signal received is transferred to control
Member；
Described control unit receives the regulating command that monitoring system issues, and converts analog quantity for order and is handed down to speed regulating control
Device, while the power value signal for also receiving speed setting controller feedback is transferred to monitoring system；
The analog quantity of the governor reception control unit simultaneously carries out PID adjusting processing, then adjusts the aperture of guide vanes of water turbine,
And guide vane opening is fed back into control unit；
The governor enables power regulation mode and simultaneously retains former aperture mode, operations staff select as needed shaping modes for
Aperture regulation or power regulation, monitoring system are sent out corresponding control signal to governor controller according to the regulative mode of selection, are adjusted
Fast device controller switches between power regulation mode and aperture regulation mode according to monitor command.
2. a kind of power station governor power closed-loop adjustment as described in claim 1 improves power regulation speed and degree of regulation
Regulating system, it is characterised in that: governor power target value is that power is given and primary frequency modulation under the power regulation mode
Superposition amount；Frequency departure dead zone, it is real to send out the amount of superposition that power is power given value and primary frequency modulation actuating quantity；Frequency returns to dead zone
Interior, real power of sending out is the given power that host computer issues, and responds the instruction variation of AGC.
3. a kind of power station governor power closed-loop adjustment as described in claim 1 improves power regulation speed and degree of regulation
Regulating system, it is characterised in that: governor monitoring system under aperture mode persistently sends out given value signal active to adjusting
Fast device, and " activation power is given " signal is sent out automatically to governor so that new setting value is being adjusted after each set point change
It comes into force fast device side；Under governor power closed-loop adjustment mode, monitoring system, which no longer exports, adjusts pulse signal, by governor system
Lasting 4~20mA active setting and active real signal progress power closed-loop adjustment of the system according to monitoring sending.
4. a kind of power station governor power closed-loop adjustment as described in claim 1 improves power regulation speed and degree of regulation
Regulating system, it is characterised in that: for the power regulation mode when frequency modulation acts next time, hair power is given for power in fact for unit
Value acts the amount of superposition with primary frequency modulation, and frequency returns in dead zone, responds the instruction variation of AGC, and real power of sending out issues for host computer
Power it is given.
5. a kind of power station governor power closed-loop adjustment as described in claim 1 improves power regulation speed and degree of regulation
Regulating system, it is characterised in that: the power regulation mode at runtime if the given input of power is faulty, governor from
Dynamic to be cut to aperture mode operation, monitoring system switches corresponding control mode according to the mode signal of governor.
6. a kind of power station governor power closed-loop adjustment as described in claim 1 improves power regulation speed and degree of regulation
Regulating system, it is characterised in that: the transmission function of governor power regulation are as follows:
Output function are as follows:
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| CN110970911B (en) * | 2019-12-13 | 2021-02-02 | 国网四川综合能源服务有限公司四川电力工程分公司 | Control method for mutual superposition of AGC and primary frequency modulation in opening degree mode |
| CN112290563A (en) * | 2020-09-16 | 2021-01-29 | 大唐水电科学技术研究院有限公司 | AGC logic superposition method for primary frequency modulation and monitoring system |
| CN112523927B (en) * | 2020-12-07 | 2023-01-10 | 中国长江电力股份有限公司 | Control method and system combining guide vane opening analog quantity closed loop control and open loop control |
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| CN114396353B (en) * | 2021-12-18 | 2023-11-10 | 华能澜沧江水电股份有限公司 | Water turbine speed regulator power oscillation judging method and system |
| CN114421478B (en) * | 2021-12-28 | 2024-03-26 | 华能澜沧江水电股份有限公司 | Closed-loop control method for power of speed regulator of huge hydropower plant |
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