CN104133466A - Method and system for testing control parameters of servo system of gas turbine speed regulator - Google Patents
Method and system for testing control parameters of servo system of gas turbine speed regulator Download PDFInfo
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Abstract
The invention discloses a method and system for testing the control parameters of a servo system of a gas turbine speed regulator. According to the method, a test function module and a data collection module are additionally arranged on a servo system input element in control logic to test displacement sensor signals indicating the displacement of a fuel valve, wherein testing is carried out in a parallel connection mode and does not influence an original control system loop. By testing switching between the test function module and a test switch and carrying out testing and data analysis on the displacement signals of the fuel valve, the accurate control parameters of the servo system of the gas turbine speed regulator can be obtained, and the accuracy of simulation model parameters of the gas turbine speed regulator and the reliability of model verification can be improved. By means of the method and system, testing of the control parameters of the servo system of the gas turbine speed regulator can be comprehensively and quickly completed, networking detection, leave-factory check and acceptance detection and daily maintenance detection of the servo system of the gas turbine speed regulator can be achieved, the servo system of the gas turbine speed regulator can operate safely, reliably and stably in a power grid, and the demand for stable calculation and analysis of the power grid can be met.
Description
Technical field
The invention belongs to grid stability modeling and analyzing field, relate to gas turbine speed regulator modeling technology, especially a kind of gas turbine speed regulator servo system control parameter test method and system thereof.
Background technology
Gas-turbine generator set participates in the fastest unit of mains frequency governing response speed, has brought into play important effect maintaining aspect the stabilization of power grids.When mains frequency changes, genset, at once by the reverse regulating power of gas turbine speed regulator, reaches the object of electric power grid frequency stabilization.Grid stability simulation calculation needs accurate gas turbine speed regulator realistic model, and its model and parameter must be tested by test, debate and be known and checking.At present; gas-turbine generator set speed regulator opertaing device is mostly from external import; for intellectual property protection or prevent from controlling parameter and arbitrarily change; its speed regulator servo-drive system equipment often encapsulates; servo-drive system output signal cannot test or change, and more cannot understand internal parameter control and control performance thereof.Meanwhile, on market, speed regulator servo-drive system device category is many, and function, the spread in performance of product are uneven, and its control performance cannot be understood, thereby is necessary to survey.
Gas turbine speed regulator servo-drive system equipment performance is related to unit and participates in once performance frequently of electrical network, and the stability of electrical network in primary frequency modulation process.Reliable and stable in order to ensure mains frequency, should participate in the actual conditions of electrical network frequency modulation and correlation technique requires to carry out the modeling of gas turbine speed regulator and parameter testing work thereof according to gas turbine.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of comprehensively, gas turbine speed regulator servo system control parameter test method and system thereof fast and accurately, realize the scene of gas turbine speed regulator servo system control parameter and accurately survey, meet the needs of stabilization of power grids computational analysis.
For solving the problems of the technologies described above, the present invention is by the following technical solutions: gas turbine speed regulator servo system control parameter test system, comprise servo-drive system equipment, EH oil pump and servomotor, displacement transducer, data acquisition module, test function module and test switch, in servo-drive system input element, set up test function module, and the increase data acquisition module in parallel with fuel valve Stroke Displacement Transducer, between test function module and servo-drive system, by test switch, be connected control; Test function module is provided with completely open and close functional module and step function module.
The instruction of test function module is moment step sudden change instruction, is directly added to servo-drive system, and middle without time delay and rate limit, servo-drive system directly drives gas turbine fuel valve by servomotor, makes gas turbine fuel valve synchronous with amount motion.
Completely open and close functional module has standard-sized sheet shelves and complete shut-down shelves, and the instruction of standard-sized sheet shelves makes the quick standard-sized sheet of gas turbine fuel valve, and the instruction of complete shut-down shelves makes the quick complete shut-down of gas turbine fuel valve; Step function module is provided with interposition shelves, positive step shelves, negative step shelves, is adjustable.
The interposition shelves of step function module are made as 50% or 60%, and instruction makes gas turbine fuel valve events to the interposition of total travel, refer to that fuel valve reaches 50% or 60% total travel; Positive step shelves are made as+10% or+5%, refer to prominent 10% or 5% total travel of opening of gas turbine fuel valve events amount; Negative step shelves are made as-5% or-10%, refer to prominent 5% or 10% total travel of closing of gas turbine fuel valve events amount.
The gas turbine speed regulator servo system control parameter test method that uses said system, in steering logic, servo-drive system input element is set up test function module, increases the displacement transducer signal that data acquisition module is tested the displacement of reflection fuel valve.
Above-mentioned gas turbine speed regulator servo system control parameter test method, comprises the following steps:
A, compressor emergency shutdown is non-and net state, and speed regulator possesses starting up's service condition; By starting EH oil pump, realize the control of gas turbine speed regulator servo-drive system to fuel valve servomotor, the servomotor of driving fuel valve is accepted steering order, by instruction regular event;
B, log-on data acquisition module, test switch is switched to test function module, test function module selects the complete shut-down shelves of completely open and close functional module to make fuel valve in complete shut-down state, selects the standard-sized sheet shelves instruction of completely open and close functional module to make the quick standard-sized sheet of fuel valve after fuel valve complete shut-down; After stable, select the complete shut-down shelves instruction of completely open and close functional module to make the quick complete shut-down of fuel valve; Stop collection signal; Keep completely open and close functional module in complete shut-down shelves; Fuel valve standard-sized sheet, complete shut-down test process finish, and stop data acquisition module;
C, restart data acquisition module, switching tests switch is to test function module, and test function module selects the interposition shelves instruction of step function module that fuel is controlled to 50% total travel position; Step function module is selected positive step shelves sudden change instruction+10%, prominent 10% the total travel amount of opening of fuel valve; After stable, step function mould is selected interposition shelves, and fuel is controlled to 50% total travel position; Stable rear step function module is selected negative step shelves sudden change instruction-10%, makes the total travel amount of the prominent pass 10% of fuel valve; After stable, change-over switch is selected completely open and close functional module, because completely open and close functional module makes the quick complete shut-down of fuel valve in complete shut-down shelves; Fuel valve step test process finishes, and stops data acquisition module;
D, stop EH oil pump, test switch is switched to fuel valve instruction, recovery system is to normal operating condition; Whole experimental test process finishes.
Above-mentioned gas turbine speed regulator servo system control parameter test method, further comprising the steps of:
Each fuel valve displacement data constantly of e, the record curve line that is recorded to by fuel valve standard-sized sheet, complete shut-down process data acquisition module, calculates opening time constant To and the shut-in time constant Tc of driving fuel valve oil motivation;
F, by data acquisition module to test fuel valve oil motivation course of action data in step function module test process, and the opening time constant of fuel valve servomotor and shut-in time constant, based on matlab, set up realistic model, and adopt least square fitting, obtain gas turbine servo system control parameter.
The problem that lacks Validity Test technology for current gas turbine speed regulator servo system control parameter, inventor has designed a whole set of perfect test macro, and set up accordingly corresponding method of testing, mainly that servo-drive system input element is set up test function module in steering logic, increase data acquisition module and test the displacement transducer signal of reflection fuel valve displacement, because data acquisition module is parallel way to the test of fuel valve Stroke Displacement Transducer signal, do not affect former control system loop.It is the precondition of testing that the startup of EH oil pump hardware device, speed regulator possess starting up's operation.According to the present invention, by test function module and test switch switching are carried out to experimental test, fuel valve displacement signal is tested and data analysis, accurate gas turbine speed regulator servo system control parameter be can obtain, the accuracy of gas turbine speed regulator simulation parameters and the reliability of modelling verification improved.The invention solves and in gas turbine speed regulator servo-drive system output element, cannot directly measure signal and obtain servo system control parameter problem, application the present invention can complete the mensuration of gas turbine speed regulator servo system control parameter comprehensively, rapidly, networking detection, the factory inspection and acceptance of realizing gas turbine speed regulator servo-drive system detects, daily servicing detects, guarantee its in electrical network safety, reliably, stably operation, meet stabilization of power grids computational analysis needs.
Accompanying drawing explanation
Fig. 1 is that the instruction of normal fuel valve is by the principle of work schematic diagram of servo system control gas turbine fuel valve.
Fig. 2 is the principle of work schematic diagram that application the present invention carries out servo system control parameter testing.
Fig. 3 tests high-level schematic functional block diagram in gas turbine speed regulator servo system control parameter test system of the present invention, in figure: 1 completely open and close functional module, 2 step function modules.
Fig. 4 is the test record curve line that application the present invention carries out the procedural test of fuel valve complete shut-down, in figure: 1 fuel valve displacement signal, 2 fuel valve instructions.
Fig. 5 is the test record curve line that application the present invention carries out the procedural test of fuel valve standard-sized sheet, in figure: 1 fuel valve displacement signal, 2 fuel valve instructions.
Fig. 6 is that application the present invention is by the servomotor shut-in time constant Tc of acquisition and the matlab realistic model of opening time constant To foundation.
Fig. 7 is the matching correlation curve (from 50% step to 60%) of the positive step of fuel valve (+10% sudden change step) matlab results of model simulation and fuel valve measured data, in figure: 1 fuel valve emulation aperture, 2 fuel valve actual measurement apertures.
Fig. 8 is the matching correlation curve (from 50% step to 40%) of the negative step of fuel valve (10% sudden change step) matlab results of model simulation and fuel valve measured data, in figure: 1 fuel valve emulation aperture, 2 fuel valve actual measurement apertures.
Fig. 9 is the emulation and actual measurement load correlation curve that servo system control parameter that application the present invention surveys acquisition is carried out generating set primary frequency regulation test (positive frequency difference+10r/min), in figure: 1 actual curve, 2 simulation curves.
Figure 10 is the emulation and actual measurement load correlation curve that servo system control parameter that application the present invention surveys acquisition is carried out generating set primary frequency regulation test (negative frequency difference-10r/min), in figure: 1 actual curve, 2 simulation curves.
Embodiment
Fig. 1 has shown that the instruction of normal fuel valve is by the principle of work of servo system control gas turbine fuel valve.
Fig. 2 has shown the principle of work of gas turbine speed regulator servo system control parameter test method of the present invention and system thereof, comprise equally servo-drive system equipment (software module or fastener), EH oil pump and servomotor, displacement transducer (LVDT), but in servo-drive system input element, set up test function module by DCS of Power Plant (as the DCS of Siemens control system) logic control configuration, and the increase data acquisition module in parallel with fuel valve Stroke Displacement Transducer (is parallel way to the test of fuel valve Stroke Displacement Transducer signal, do not affect former control system loop), between test function module and servo-drive system, by test switch, be connected control, test function module is provided with completely open and close functional module and step function module (as Fig. 3).The instruction of test function module is moment step sudden change instruction, is directly added to servo-drive system, and middle without time delay and rate limit, servo-drive system directly drives gas turbine fuel valve by servomotor, makes gas turbine fuel valve synchronous with amount motion.
Wherein, completely open and close functional module has standard-sized sheet shelves and complete shut-down shelves, and the instruction of standard-sized sheet shelves makes the quick standard-sized sheet of gas turbine fuel valve, and the instruction of complete shut-down shelves makes the quick complete shut-down of gas turbine fuel valve; Step function module is provided with interposition shelves, positive step shelves, negative step shelves, is adjustable.
The interposition shelves of step function module can be made as 50% or 60%, and instruction makes gas turbine fuel valve events to the interposition of total travel, refer to that fuel valve reaches 50% or 60% total travel; Positive step shelves can be made as+10% or+5%, refer to prominent 10% or 5% total travel of opening of gas turbine fuel valve events amount; Negative step shelves can be made as-5% or-10%, refer to prominent 5% or 10% total travel of closing of gas turbine fuel valve events amount.
Test function module is selected completely open and close functional module or step function functions of modules by change-over switch, and completely open and close module completes fuel valve standard-sized sheet and complete shut-down process testing by switch 1; Step function module completes the positive step of fuel valve and negative step process testing by switch 2.It is to meet experimental test prerequisite that EH pump start and speed regulator possess start service condition.
Using said system to carry out the parameter testing of gas turbine speed regulator servo system control comprises the following steps:
A, compressor emergency shutdown is non-and net state, and speed regulator possesses starting up's service condition; By starting EH oil pump, realize the control of gas turbine speed regulator servo-drive system to fuel valve servomotor, the servomotor of driving fuel valve is accepted steering order, by instruction regular event;
B, log-on data acquisition module (signal acquiring system, as Ni Gaoli high speed acquisition instrument), test switch is switched to test function module, test function module selects the complete shut-down shelves of completely open and close functional module to make fuel valve in complete shut-down state, selects the standard-sized sheet shelves instruction of completely open and close functional module to make the quick standard-sized sheet of fuel valve (standard-sized sheet process record curve line is as Fig. 4) after fuel valve complete shut-down; After stable, select the complete shut-down shelves instruction of completely open and close functional module to make the quick complete shut-down of fuel valve (complete shut-down process record curve line is as Fig. 5); Stop collection signal; Keep completely open and close functional module in complete shut-down shelves; Fuel valve standard-sized sheet, complete shut-down test process finish, and stop data acquisition module;
C, restart data collecting module collected fuel valve displacement signal, switching tests switch is to test function module, and test function module selects the interposition shelves instruction of step function module that fuel is controlled to 50% total travel position; Step function module is selected positive step shelves (sudden change instruction+10%), prominent 10% the total travel amount (overall process record curve line is as Fig. 7) of opening of fuel valve; After stable, step function mould is selected interposition shelves, and fuel is controlled to 50% total travel position; Stable rear step function module is selected negative step shelves (sudden change instruction-10%), makes the total travel amount (overall process record curve line is as Fig. 8) of the prominent pass 10% of fuel valve; After stable, change-over switch is selected completely open and close functional module, because completely open and close functional module makes the quick complete shut-down of fuel valve in complete shut-down shelves; Fuel valve step test process finishes, and stops data acquisition module;
D, stop EH oil pump, test switch is switched to fuel valve instruction, recovery system is to normal operating condition; Whole experimental test process finishes.
Each fuel valve displacement data constantly of e, the record curve line (curves 1 in Figure 4 and 5) that is recorded to by fuel valve standard-sized sheet, complete shut-down process data acquisition module, calculates opening time constant To and the shut-in time constant Tc of driving fuel valve oil motivation;
The fuel valve displacement data in each moment of the record curve line (in Fig. 4, curve 1) that based on fuel valve standard-sized sheet process data acquisition module is recorded to, gets in standard-sized sheet process a period of time Δ T by T
1change to T
2(Δ T=T
2-T
1), fuel valve displacement data is by L
1change L
2(Δ L=L
2-L
1), according to formula:
Opening time constant: To=100/[(L
2-L
1)/Δ T]
＝100/[(95.059-6.699)/0.368]
＝0.416
Fuel valve servomotor opening time constant test data and result of calculation are as shown in table 1.
Table 1 fuel valve servomotor opening time constant is surveyed data and reckoner
| Title | Formula | Data |
| L 1(％) | / | 6.699 |
| L 2(％) | / | 95.059 |
| ΔT(s) | ΔT＝T 1-T 2 | 0.368 |
| Opening time constant (s) | To＝100/[(L 2-L 1)/ΔT] | 0.416 |
The fuel valve displacement data in each moment of the record curve line (in Fig. 5, curve 1) that based on fuel valve complete shut-down process data acquisition module is recorded to, gets in complete shut-down process a period of time Δ T by T
1change to T
2(Δ T=T
2-T
1), fuel valve displacement data is by L
1change L
2(Δ L=L
1-L
2), according to formula:
Opening time constant: Tc=100/[(L
1-L
2)/Δ T]
＝100/[(84.453-7.329)/0.147]
＝0.190
Fuel valve servomotor shut-in time constant survey data and result of calculation are as shown in table 2.
Table 2 fuel valve servomotor shut-in time constant is surveyed data and reckoner
| Title | Formula | Data |
| L 1(％) | / | 84.453 |
| L 2(％) | / | 7.329 |
| ΔT(s) | ΔT＝T 1-T 2 | 0.147 |
| Shut-in time constant (s) | Tc＝100/[(L 1-L 2)/ΔT] | 0.190 |
F, by data acquisition module to test fuel valve oil motivation course of action data in step function module test process, and the opening time constant of fuel valve servomotor and shut-in time constant, based on matlab, set up realistic model (Fig. 6), and adopt least square fitting, can obtain gas turbine servo system control parameter.
The servo system control parameter that adopts said system and method actual measurement to obtain is carried out the emulation of generating set primary frequency regulation test and is surveyed genset electromagnetic power correlation curve as Fig. 9 and 10.From emulation with actual measurement load curve to recently, simulation result and measured result degree of agreement are very high, have improved the accuracy of stabilization of power grids Simulation Analysis.
Claims (7)
1. a gas turbine speed regulator servo system control parameter test system, comprise servo-drive system equipment, EH oil pump and servomotor, displacement transducer, data acquisition module, test function module and test switch, it is characterized in that: in servo-drive system input element, set up test function module, and the increase data acquisition module in parallel with fuel valve Stroke Displacement Transducer, between test function module and servo-drive system, by test switch, be connected control; Described test function module is provided with completely open and close functional module and step function module.
2. gas turbine speed regulator servo system control parameter test system according to claim 1, it is characterized in that: the instruction of described test function module is moment step sudden change instruction, directly be added to servo-drive system, middle without time delay and rate limit, servo-drive system directly drives gas turbine fuel valve by servomotor, makes gas turbine fuel valve synchronous with amount motion.
3. gas turbine speed regulator servo system control parameter test system according to claim 2, it is characterized in that: described completely open and close functional module has standard-sized sheet shelves and complete shut-down shelves, the instruction of standard-sized sheet shelves makes the quick standard-sized sheet of gas turbine fuel valve, and the instruction of complete shut-down shelves makes the quick complete shut-down of gas turbine fuel valve; Described step function module is provided with interposition shelves, positive step shelves, negative step shelves, is adjustable.
4. gas turbine speed regulator servo system control parameter test system according to claim 3, it is characterized in that: the interposition shelves of described step function module are made as 50% or 60%, instruction makes gas turbine fuel valve events to the interposition of total travel, refers to that fuel valve reaches 50% or 60% total travel; Positive step shelves are made as+10% or+5%, refer to prominent 10% or 5% total travel of opening of gas turbine fuel valve events amount; Negative step shelves are made as-5% or-10%, refer to prominent 5% or 10% total travel of closing of gas turbine fuel valve events amount.
5. right to use requires the gas turbine speed regulator servo system control parameter test method of system described in 1, it is characterized in that: servo-drive system input element is set up test function module in steering logic, increase the displacement transducer signal that data acquisition module is tested the displacement of reflection fuel valve.
6. gas turbine speed regulator servo system control parameter test method according to claim 5, is characterized in that comprising the following steps:
A, compressor emergency shutdown is non-and net state, and speed regulator possesses starting up's service condition; By starting EH oil pump, realize the control of gas turbine speed regulator servo-drive system to fuel valve servomotor, the servomotor of driving fuel valve is accepted steering order, by instruction regular event;
B, log-on data acquisition module, test switch is switched to test function module, test function module selects the complete shut-down shelves of completely open and close functional module to make fuel valve in complete shut-down state, selects the standard-sized sheet shelves instruction of completely open and close functional module to make the quick standard-sized sheet of fuel valve after fuel valve complete shut-down; After stable, select the complete shut-down shelves instruction of completely open and close functional module to make the quick complete shut-down of fuel valve; Stop collection signal; Keep completely open and close functional module in complete shut-down shelves; Fuel valve standard-sized sheet, complete shut-down test process finish, and stop data acquisition module;
C, restart data acquisition module, switching tests switch is to test function module, and test function module selects the interposition shelves instruction of step function module that fuel is controlled to 50% total travel position; Step function module is selected positive step shelves sudden change instruction+10%, prominent 10% the total travel amount of opening of fuel valve; After stable, step function mould is selected interposition shelves, and fuel is controlled to 50% total travel position; Stable rear step function module is selected negative step shelves sudden change instruction-10%, makes the total travel amount of the prominent pass 10% of fuel valve; After stable, change-over switch is selected completely open and close functional module, because completely open and close functional module makes the quick complete shut-down of fuel valve in complete shut-down shelves; Fuel valve step test process finishes, and stops data acquisition module;
D, stop EH oil pump, test switch is switched to fuel valve instruction, recovery system is to normal operating condition; Whole experimental test process finishes.
7. gas turbine speed regulator servo system control parameter test method according to claim 6, characterized by further comprising following steps:
Each fuel valve displacement data constantly of e, the record curve line that is recorded to by fuel valve standard-sized sheet, complete shut-down process data acquisition module, calculates opening time constant To and the shut-in time constant Tc of driving fuel valve oil motivation;
F, by data acquisition module to test fuel valve oil motivation course of action data in step function module test process, and the opening time constant of fuel valve servomotor and shut-in time constant, based on matlab, set up realistic model, and adopt least square fitting, obtain gas turbine servo system control parameter.
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| CN112901598A (en) * | 2021-01-29 | 2021-06-04 | 上海电气燃气轮机有限公司 | Gas turbine hydraulic actuating mechanism testing method, electronic terminal and storage medium |
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Application publication date: 20141105 |