CN103850872A - Comprehensive optimization test method of combined relationship of Kaplan turbine - Google Patents
Comprehensive optimization test method of combined relationship of Kaplan turbine Download PDFInfo
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- CN103850872A CN103850872A CN201410080516.1A CN201410080516A CN103850872A CN 103850872 A CN103850872 A CN 103850872A CN 201410080516 A CN201410080516 A CN 201410080516A CN 103850872 A CN103850872 A CN 103850872A
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Abstract
The invention discloses a comprehensive optimization test method of a combined relationship of a Kaplan turbine. The comprehensive optimization test method comprises the following steps of (1) arranging measuring points; (2) dividing a water head; (3) setting a threshold; (4) determining a principle; (5) adjusting a machine set; (6) adjusting a degree of opening; (7) fixing a variable paddle of a guide vane; (7.1) adjusting the degree of opening of the paddle; (7.2) settling test data; (7.3) determining an optimal degree of opening of the paddle; (7.4) optimizing a combined relationship curve. The comprehensive optimization test method has the advantages that 1) the method is simple and strong in operability; 2) the defect of incapability of guaranteeing the running stability of the conventional Kaplan turbine is avoided, and a combined relationship test of the Kaplan turbine is instructed; 3) optimization of the combined relationship of the Kaplan turbine is guided, the economic benefit of the water turbine is guaranteed, the safety of the machine set is guaranteed, and blindness of purely relying on an efficiency characteristic optimization method of the water turbine is avoided.
Description
Technical field
The invention belongs to turbine technology field, relate to a kind of Kaplan turbine joint and be related to complex optimum test method.
Background technique
Along with clean energy resource hydroelectric power obtains Devoting Major Efforts To Developing, Kaplan turbine is required to keep the efficient stable operation under each operating mode.And the curve combination of its blade and stator under each head is the combination curve of Kaplan turbine.Under optimum joint relation, the blade of water turbine and stator be all the time in optimum Working, and now fluidised form the best in runner, current are the most steady, and unit vibration and water turbine cavitation erosion are minimum, most effective.Therefore the whether correct or no optimum of joint relation directly has influence on turbine efficiency and operation stability, will cause water wheels unit abnormal vibrations when deviation is serious.As the tubular unit in Zi Lanba water power plant, Sichuan, just cause unit seriously to vibrate because combination curve is incorrect, its water was led to vibrate and had been reached 500 microns at that time.Joint relation determine be generally manufacturing firm according to model test or the calculated results, draw according to the principle of efficiency optimization.Due to the factor such as adjusting function and hydraulic turbine model and Prototype Law otherness of machining deviation, speed regulator being installed, it is not the joint relation of actual the best that capital causes the combination curve that producer provides, and water turbine manufacturing firm does not generally all provide little guide vane opening, the i.e. combination curve of 40～50% following guide vane openings.Therefore, the joint relation of Kaplan turbine need to check, optimize on prototype.And the optimum on-cam operating condition of on-the-spot Kaplan turbine is definite, conventionally---best efficiency point of blade aperture is determined the best stator of prototype under this head---the blade corresponding relation that adopts stator under some heads, is the optimum joint relation under this head.Due to Kaplan turbine group head and pressure is low, runner differential pressure is less than normal, face out-of-flatness is stopped up, measured in pressure-measuring pipe Louis, turbine efficiency measurement error is larger, therefore, measure turbine efficiency value often because error compared with large and unreliable, under running on the lower load, this situation is particularly outstanding, and only carries out joint optimization according to efficiency optimization, tend to cause unit vibration increase situation to occur, and the emphasis that the same Ye Shi of the safe and stable operation of unit power plant is concerned about.Therefore it is very necessary, existing Kaplan turbine joint optimized relation method being improved.
Summary of the invention
The technical problem to be solved in the present invention is, for the defect of existing Kaplan turbine joint optimized relation technology, provide a kind of Kaplan turbine joint based on unit operation stability characteristic and turbine efficiency characteristic to be related to complex optimum test method, the test of carrying out by the method, the joint Optimization Work that can be Kaplan turbine provides guidance.
Technological scheme of the present invention is that this Kaplan turbine joint providing is related to that complex optimum test method comprises the steps:
(1), arrange measuring point.Use conventional method, in the Kaplan turbine group for the treatment of complex optimum test, arrange and comprise unit vibration measuring point, unit throw measuring point, water turbine pressure pulsation measuring point is at interior Kaplan turbine organizing, stability test measuring point, with comprise power of the assembling unit measuring point, Turbine Flow Passage differential pressure measuring point or spiral case differential pressure measuring point, Turbine Flow Passage inlet pressure measuring point or spiral case inlet pressure measuring point, draft tube outlet pressure measuring point is at interior Kaplan turbine efficiency test measuring point, and comprise guide vane opening, blade aperture, upper pool elevation, the level of tail water, machine class frequency, power factor is at interior background measuring point,
(2), divide head.The operating head polishing of the Kaplan turbine group for the treatment of complex optimum test is divided into 3～5 test head sections;
(3), set threshold values.According to standard GB/T/T11348.5 and standard GB/T/T6075.5, standard GB/T/T7894, standard GB/T/T15468, standard GB/T/T8564, use conventional method, the amplitude of setting respectively unit vibration measuring point, unit throw measuring point, water turbine pressure pulsation measuring point in the water turbine organizing, stability test that step (1) obtains the Kaplan turbine group for the treatment of complex optimum test increases threshold values, is related to the foundation of complex optimum as the Kaplan turbine joint for the treatment of complex optimum test;
(4), determine principle.Determine and treat that the Kaplan turbine joint of complex optimum test is related to the principle of complex optimum, this treats that the Kaplan turbine joint of complex optimum test is related to that one of principle of complex optimum is for little aperture stability characteristic priority principle, be that no-load opening is above, under guide vane opening or the little aperture operating mode of blade aperture below 40～50%, adopt the principle of paying the utmost attention to unit operation stability characteristic; This treat Kaplan turbine joint of complex optimum test be related to complex optimum principle two be large aperture energy response priority principle, be under more than 40～50% large aperture operating mode of guide vane opening or blade aperture, adopt the principle of paying the utmost attention to turbine efficiency characteristic;
(5), adjust unit.Inspection treats that electric, machinery and the speed control system of the Kaplan turbine group of complex optimum test have fault-free, check and clear up trash rack and the pressure measurement pipeline of this unit.Use conventional method, the required value when upper pool elevation of this unit, the level of tail water, generator power, machine class frequency, power factor are adjusted to respectively to complex optimum test;
(6), regulate aperture.By grid-connected to no-load opening the Kaplan turbine group for the treatment of complex optimum test, the speed regulator of this unit is switched to local control, the joint of this unit is placed in auto state, manually one direction regulates the guide vane opening of this unit, make guide vane opening be stabilized in one by one respectively no-load opening, 30% aperture, 40% aperture, 50% aperture, 60% aperture, 65% aperture, 70% aperture, 75% aperture, 80% aperture, 85% aperture, 90% aperture, 95% aperture, the guide vane opening that test head maximum load allows, be respectively stabilization time 3～5 minutes, record the test data that each operating mode measuring point measures,
(7), determine stator and become blade.
(7.1), regulate blade aperture.The guide vane opening of the Kaplan turbine group for the treatment of complex optimum test is stabilized in respectively to no-load opening one by one, 30% aperture, 35% aperture, 40% aperture, 45% aperture, 50% aperture, 55% aperture, 60% aperture, 65% aperture, 70% aperture, 75% aperture, 80% aperture, 85% aperture, 90% aperture, 95% aperture, the guide vane opening that test head maximum load allows, remove the automatic joint of described speed regulator, fixing each guide vane opening, manually one direction regulates blade aperture, 4～6 blade apertures of unidirectional adjusting in distance is treated former joint blade aperture-15%～+ 15% scope of Kaplan turbine group of complex optimum test, make to become blade operating mode and contain maximal efficiency operating mode, each change blade operating mode is stablized 3～5 minutes, each change blade operating mode efficiency test of turbine data that the each stator operating mode of interocclusal record stationary phase measuring point measures,
(7.2), repairing experiment data.
(7.2.1), arrange Kaplan turbine group efficiency test of turbine data.Use conventional method, each change blade operating mode efficiency test of turbine data that each stator operating mode measuring point of arrangement step (7.1) record measures, obtain comprising power of the assembling unit measuring point amplitude, Turbine Flow Passage differential pressure measuring point amplitude or spiral case differential pressure measuring point amplitude, Turbine Flow Passage inlet pressure measuring point amplitude or spiral case inlet pressure measuring point amplitude, draft tube outlet pressure measuring point amplitude is in interior efficiency test of turbine measuring point amplitude, and comprise guide vane opening, blade aperture, upper pool elevation, the level of tail water, machine class frequency, power factor is in interior background measuring point amplitude.According to above-mentioned each measuring point amplitude, use conventional Calculation Method, calculate the turbine efficiency of Kaplan turbine group; According to the turbine efficiency of the Kaplan turbine group calculating, use conventional method again, draw out the turbine efficiency under above-mentioned each stator operating mode---become the tendency chart of blade aperture.Then, use method of least squares to the turbine efficiency under drawn out each stator operating mode---become blade aperture tendency chart and carry out matching.The turbine efficiency of described each stator operating mode---becoming blade aperture tendency chart will be into determining that in each stator operating mode, the more excellent blade operating point of turbine efficiency provides foundation;
(7.2.2), arrange Kaplan turbine organizing, stability test data.Use conventional method, each change blade operating mode efficiency test of turbine data that each stator operating mode measuring point of arrangement step (7.1) record measures, obtain water turbine organizing, stability including unit vibration measuring point amplitude, unit throw measuring point amplitude, water turbine pressure pulsation measuring point amplitude test measuring point amplitude, and background measuring point amplitude including guide vane opening, blade aperture, upper pool elevation, the level of tail water, machine class frequency, power factor.According to above-mentioned each measuring point amplitude, use conventional method, draw out the stability test measuring point amplitude under above-mentioned each stator operating mode---become the tendency chart of blade aperture.Described each stator operating mode stability inferior test measuring point amplitude---becoming blade aperture tendency chart will be into determining that in each stator operating mode, the more excellent blade operating point of water turbine organizing, stability provides foundation;
(7.3), determine optimum blade aperture.
(7.3.1), determine little guide vane opening operating mode joint relation.Treat that according to step (4) is determined the Kaplan turbine joint of complex optimum test is related to the principle of complex optimum, the each change blade operating mode efficiency test of turbine data that measure according to step (7.1) each stator operating mode measuring point that obtains; Basis for selecting step (7.2.2) the stability test measuring point amplitude under each stator operating mode of painting---become the tendency chart of blade aperture, use conventional method, selecting the blade aperture that measuring point amplitude is less than the blade of former on-cam operating condition measuring point amplitude and amplitude minimum is optimum blade aperture.Determine successively the optimum blade aperture of all the other guide vane openings according to above principle;
(7.3.2), determine large guide vane opening operating mode joint relation.Treat that according to step (4) is determined the Kaplan turbine joint of complex optimum test is related to the principle of complex optimum, the each change blade operating mode efficiency test of turbine data that measure according to step (7.1) each stator operating mode measuring point that obtains, turbine efficiency under above-mentioned each stator operating mode of drawing out according to step (7.2.1)---become the tendency chart of blade aperture, use conventional method, select 2～3 the blade apertures of turbine efficiency higher than former on-cam operating condition point turbine efficiency under above-mentioned stator operating mode undetermined, again in blade aperture operating mode to be selected, according to step (7.2.2) the stability test measuring point amplitude under each stator operating mode of painting---become the tendency chart of blade aperture, select the increase of stability test measuring point amplitude and do not exceed the determined unit vibration measuring point of step (3), unit throw measuring point, the amplitude of water turbine pressure pulsation measuring point increases the blade aperture of threshold values, for the optimum blade aperture under guide vane opening undetermined.Determine successively the optimum blade aperture of all the other guide vane openings according to above principle;
(7.4), optimize joint relation curve.The optimum blade aperture of each guide vane opening of selecting according to step (7.3), use conventional method, draw out blade under described each head and the relation curve of guide vane opening, adopt least square fitting method that the combination curve under described each head is carried out to matching optimization process, so that combination curve is smooth, regularity is stronger.
The invention has the beneficial effects as follows:
1), test method is simple, strong operability;
2), avoided existing Kaplan turbine to use joint to optimize conventional method, the defect that the reliability only causing according to turbine efficiency is not high, operation stability cannot be protected, can be water turbine joint Optimum Experiment guidance is provided;
3), instruct Kaplan turbine joint optimized relation by the method, unit operation stability and turbine efficiency characteristic are considered, both guarantee the economic benefit of water turbine, ensured again the Security of unit, avoided the blindness of simple dependence turbine efficiency characteristic optimizing method.
Embodiment
Embodiment 1:
(1), arrange measuring point.Use conventional method, in the Kaplan turbine group for the treatment of complex optimum test, arrange and comprise unit vibration measuring point, unit throw measuring point, water turbine pressure pulsation measuring point is at interior Kaplan turbine organizing, stability test measuring point, with comprise power of the assembling unit measuring point, Turbine Flow Passage differential pressure measuring point or spiral case differential pressure measuring point, Turbine Flow Passage inlet pressure measuring point or spiral case inlet pressure measuring point, draft tube outlet pressure measuring point is at interior Kaplan turbine efficiency test measuring point, and comprise guide vane opening, blade aperture, upper pool elevation, the level of tail water, machine class frequency, power factor is at interior background measuring point,
(2), divide head.The operating head polishing of the Kaplan turbine group for the treatment of complex optimum test is divided into 3 test head sections;
(3), set threshold values.According to standard GB/T/T11348.5 and standard GB/T/T6075.5, standard GB/T/T7894, standard GB/T/T15468, standard GB/T/T8564, use conventional method, the amplitude of setting respectively unit vibration measuring point, unit throw measuring point, water turbine pressure pulsation measuring point in the water turbine organizing, stability test that step (1) obtains the Kaplan turbine group for the treatment of complex optimum test increases threshold values, is related to the foundation of complex optimum as the Kaplan turbine joint for the treatment of complex optimum test;
(4), determine principle.Determine that the Kaplan turbine joint for the treatment of complex optimum test is related to that the principle of complex optimum is little aperture stability characteristic priority principle, be more than no-load opening, under the little aperture operating mode of guide vane opening below 40%, adopt the principle of paying the utmost attention to unit operation stability characteristic;
(5), adjust unit.Inspection treats that electric, machinery and the speed control system of the Kaplan turbine group of complex optimum test have fault-free, check and clear up trash rack and the pressure measurement pipeline of this unit.Use conventional method, the required value when upper pool elevation of this unit, the level of tail water, generator power, machine class frequency, power factor are adjusted to respectively to complex optimum test;
(6), regulate aperture.By grid-connected to no-load opening the Kaplan turbine group for the treatment of complex optimum test, the speed regulator of this unit is switched to local control, the joint of this unit is placed in auto state, manually one direction regulates the guide vane opening of this unit, make guide vane opening be stabilized in one by one respectively no-load opening, 30% aperture, 40% aperture, 50% aperture, 60% aperture, 65% aperture, 70% aperture, 75% aperture, 80% aperture, 85% aperture, 90% aperture, 95% aperture, the guide vane opening that test head maximum load allows, be respectively stabilization time 3 minutes, record the test data that each operating mode measuring point measures,
(7), determine stator and become blade.
(7.1), regulate blade aperture.The guide vane opening of the Kaplan turbine group for the treatment of complex optimum test is stabilized in respectively to no-load opening one by one, 30% aperture, 35% aperture, 40% aperture, 45% aperture, 50% aperture, 55% aperture, 60% aperture, 65% aperture, 70% aperture, 75% aperture, 80% aperture, 85% aperture, 90% aperture, 95% aperture, the guide vane opening that test head maximum load allows, remove the automatic joint of described speed regulator, fixing each guide vane opening, manually one direction regulates blade aperture, 4 blade apertures of unidirectional adjusting in distance is treated former joint blade aperture-15%～+ 15% scope of Kaplan turbine group of complex optimum test, make to become blade operating mode and contain maximal efficiency operating mode, each change blade operating mode is stablized 3 minutes, each change blade operating mode efficiency test of turbine data that the each stator operating mode of interocclusal record stationary phase measuring point measures,
(7.2), repairing experiment data.
(7.2.1), arrange Kaplan turbine group efficiency test of turbine data.Use conventional method, each change blade operating mode efficiency test of turbine data that each stator operating mode measuring point of arrangement step (7.1) record measures, obtain comprising power of the assembling unit measuring point amplitude, Turbine Flow Passage differential pressure measuring point amplitude or spiral case differential pressure measuring point amplitude, Turbine Flow Passage inlet pressure measuring point amplitude or spiral case inlet pressure measuring point amplitude, draft tube outlet pressure measuring point amplitude is in interior efficiency test of turbine measuring point amplitude, and comprise guide vane opening, blade aperture, upper pool elevation, the level of tail water, machine class frequency, power factor is in interior background measuring point amplitude.According to above-mentioned each measuring point amplitude, use conventional Calculation Method, calculate the turbine efficiency of Kaplan turbine group; According to the turbine efficiency of the Kaplan turbine group calculating, use conventional method again, draw out the turbine efficiency under above-mentioned each stator operating mode---become the tendency chart of blade aperture.Then, use method of least squares to the turbine efficiency under drawn out each stator operating mode---become blade aperture tendency chart and carry out matching;
(7.2.2), arrange Kaplan turbine organizing, stability test data.Use conventional method, each change blade operating mode efficiency test of turbine data that each stator operating mode measuring point of arrangement step (7.1) record measures, obtain water turbine organizing, stability including unit vibration measuring point amplitude, unit throw measuring point amplitude, water turbine pressure pulsation measuring point amplitude test measuring point amplitude, and background measuring point amplitude including guide vane opening, blade aperture, upper pool elevation, the level of tail water, machine class frequency, power factor.According to above-mentioned each measuring point amplitude, use conventional method, draw out the stability test measuring point amplitude under above-mentioned each stator operating mode---become the tendency chart of blade aperture;
(7.3), determine optimum blade aperture.
(7.3.1), determine little guide vane opening operating mode joint relation.Treat that according to step (4) is determined the Kaplan turbine joint of complex optimum test is related to the principle of complex optimum, the each change blade operating mode efficiency test of turbine data that measure according to step (7.1) each stator operating mode measuring point that obtains; Basis for selecting step (7.2.2) the stability test measuring point amplitude under each stator operating mode of painting---become the tendency chart of blade aperture, use conventional method, selecting the blade aperture that measuring point amplitude is less than the blade of former on-cam operating condition measuring point amplitude and amplitude minimum is optimum blade aperture.Determine successively the optimum blade aperture of all the other guide vane openings according to above principle;
(7.3.2), determine large guide vane opening operating mode joint relation.Treat that according to step (4) is determined the Kaplan turbine joint of complex optimum test is related to the principle of complex optimum, the each change blade operating mode efficiency test of turbine data that measure according to step (7.1) each stator operating mode measuring point that obtains, turbine efficiency under above-mentioned each stator operating mode of drawing out according to step (7.2.1)---become the tendency chart of blade aperture, use conventional method, select 2 the blade apertures of turbine efficiency higher than former on-cam operating condition point turbine efficiency under above-mentioned stator operating mode undetermined, again in blade aperture operating mode to be selected, according to step (7.2.2) the stability test measuring point amplitude under each stator operating mode of painting---become the tendency chart of blade aperture, select the increase of stability test measuring point amplitude and do not exceed the determined unit vibration measuring point of step (3), unit throw measuring point, the amplitude of water turbine pressure pulsation measuring point increases the blade aperture of threshold values, for the optimum blade aperture under guide vane opening undetermined.Determine successively the optimum blade aperture of all the other guide vane openings according to above principle;
(7.4), optimize joint relation curve.The optimum blade aperture of each guide vane opening of selecting according to step (7.3), use conventional method, draw out blade under described each head and the relation curve of guide vane opening, adopt least square fitting method that the combination curve under described each head is carried out to matching optimization process;
Embodiment 2:
Step (1)～(3) are with embodiment 1;
(4), determine principle.Determine that the Kaplan turbine joint for the treatment of complex optimum test is related to that the principle of complex optimum is large aperture energy response priority principle,, under the more than 50% large aperture operating mode of guide vane opening or blade aperture, adopts the principle of paying the utmost attention to turbine efficiency characteristic;
Step (5) is with embodiment 1;
(6), regulate aperture.By grid-connected to no-load opening the Kaplan turbine group for the treatment of complex optimum test, the speed regulator of this unit is switched to local control, the joint of this unit is placed in auto state, manually one direction regulates the guide vane opening of this unit, make guide vane opening be stabilized in one by one respectively no-load opening, 30% aperture, 40% aperture, 50% aperture, 60% aperture, 65% aperture, 70% aperture, 75% aperture, 80% aperture, 85% aperture, 90% aperture, 95% aperture, the guide vane opening that test head maximum load allows, be respectively stabilization time 5 minutes, record the test data that each operating mode measuring point measures,
(7), determine stator and become blade.
(7.1), regulate blade aperture.The guide vane opening of the Kaplan turbine group for the treatment of complex optimum test is stabilized in respectively to no-load opening one by one, 30% aperture, 35% aperture, 40% aperture, 45% aperture, 50% aperture, 55% aperture, 60% aperture, 65% aperture, 70% aperture, 75% aperture, 80% aperture, 85% aperture, 90% aperture, 95% aperture, the guide vane opening that test head maximum load allows, remove the automatic joint of described speed regulator, fixing each guide vane opening, manually one direction regulates blade aperture, 6 blade apertures of unidirectional adjusting in distance is treated former joint blade aperture-15%～+ 15% scope of Kaplan turbine group of complex optimum test, make to become blade operating mode and contain maximal efficiency operating mode, each change blade operating mode is stablized 5 minutes, each change blade operating mode efficiency test of turbine data that the each stator operating mode of interocclusal record stationary phase measuring point measures,
Step (7.2) is with embodiment 1;
(7.3), determine optimum blade aperture.
Step (7.3.1) is with embodiment 1;
(7.3.2), determine large guide vane opening operating mode joint relation.Treat that according to step (4) is determined the Kaplan turbine joint of complex optimum test is related to the principle of complex optimum, the each change blade operating mode efficiency test of turbine data that measure according to step (7.1) each stator operating mode measuring point that obtains, turbine efficiency under above-mentioned each stator operating mode of drawing out according to step (7.2.1)---become the tendency chart of blade aperture, use conventional method, select 3 the blade apertures of turbine efficiency higher than former on-cam operating condition point turbine efficiency under above-mentioned stator operating mode undetermined, again in blade aperture operating mode to be selected, according to step (7.2.2) the stability test measuring point amplitude under each stator operating mode of painting---become the tendency chart of blade aperture, select the increase of stability test measuring point amplitude and do not exceed the determined unit vibration measuring point of step (3), unit throw measuring point, the amplitude of water turbine pressure pulsation measuring point increases the blade aperture of threshold values, for the optimum blade aperture under guide vane opening undetermined.Determine successively the optimum blade aperture of all the other guide vane openings according to above principle;
Step (7.4) is with embodiment 1.
Claims (1)
1. Kaplan turbine joint is related to a complex optimum test method, and the method comprises the steps:
(1), arrange measuring point, use conventional method, in the Kaplan turbine group for the treatment of complex optimum test, arrange and comprise unit vibration measuring point, unit throw measuring point, water turbine pressure pulsation measuring point is at interior Kaplan turbine organizing, stability test measuring point, with comprise power of the assembling unit measuring point, Turbine Flow Passage differential pressure measuring point or spiral case differential pressure measuring point, Turbine Flow Passage inlet pressure measuring point or spiral case inlet pressure measuring point, draft tube outlet pressure measuring point is at interior Kaplan turbine efficiency test measuring point, and comprise guide vane opening, blade aperture, upper pool elevation, the level of tail water, machine class frequency, power factor is at interior background measuring point,
(2), divide head, the operating head polishing of the Kaplan turbine group for the treatment of complex optimum test is divided into 3～5 test head sections;
(3), set threshold values, according to standard GB/T/T11348.5 and standard GB/T/T6075.5, standard GB/T/T7894, standard GB/T/T15468, standard GB/T/T8564, use conventional method, the amplitude of setting respectively unit vibration measuring point, unit throw measuring point, water turbine pressure pulsation measuring point in the water turbine organizing, stability test that step (1) obtains the Kaplan turbine group for the treatment of complex optimum test increases threshold values, is related to the foundation of complex optimum as the Kaplan turbine joint for the treatment of complex optimum test;
(4), determine principle, determine and treat that the Kaplan turbine joint of complex optimum test is related to the principle of complex optimum, this treats that the Kaplan turbine joint of complex optimum test is related to that one of principle of complex optimum is for little aperture stability characteristic priority principle, be that no-load opening is above, under guide vane opening or the little aperture operating mode of blade aperture below 40～50%, adopt the principle of paying the utmost attention to unit operation stability characteristic; This treat Kaplan turbine joint of complex optimum test be related to complex optimum principle two be large aperture energy response priority principle, be under more than 40～50% large aperture operating mode of guide vane opening or blade aperture, adopt the principle of paying the utmost attention to turbine efficiency characteristic;
(5), adjust unit, inspection treats that electric, machinery and the speed control system of the Kaplan turbine group of complex optimum test have fault-free, check and clear up trash rack and the pressure measurement pipeline of this unit, use conventional method, the required value when upper pool elevation of this unit, the level of tail water, generator power, machine class frequency, power factor are adjusted to respectively to complex optimum test;
(6), regulate aperture, by grid-connected to no-load opening the Kaplan turbine group for the treatment of complex optimum test, the speed regulator of this unit is switched to local control, the joint of this unit is placed in auto state, manually one direction regulates the guide vane opening of this unit, make guide vane opening be stabilized in one by one respectively no-load opening, 30% aperture, 40% aperture, 50% aperture, 60% aperture, 65% aperture, 70% aperture, 75% aperture, 80% aperture, 85% aperture, 90% aperture, 95% aperture, the guide vane opening that test head maximum load allows, be respectively stabilization time 3～5 minutes, record the test data that each operating mode measuring point measures,
(7), determine stator become blade,
(7.1), regulate blade aperture, the guide vane opening of the Kaplan turbine group for the treatment of complex optimum test is stabilized in respectively to no-load opening one by one, 30% aperture, 35% aperture, 40% aperture, 45% aperture, 50% aperture, 55% aperture, 60% aperture, 65% aperture, 70% aperture, 75% aperture, 80% aperture, 85% aperture, 90% aperture, 95% aperture, the guide vane opening that test head maximum load allows, remove the automatic joint of described speed regulator, fixing each guide vane opening, manually one direction regulates blade aperture, 4～6 blade apertures of unidirectional adjusting in distance is treated former joint blade aperture-15%～+ 15% scope of Kaplan turbine group of complex optimum test, make to become blade operating mode and contain maximal efficiency operating mode, each change blade operating mode is stablized 3～5 minutes, each change blade operating mode efficiency test of turbine data that the each stator operating mode of interocclusal record stationary phase measuring point measures,
(7.2), repairing experiment data,
(7.2.1), arrange Kaplan turbine group efficiency test of turbine data, use conventional method, each change blade operating mode efficiency test of turbine data that each stator operating mode measuring point of arrangement step (7.1) record measures, obtain comprising power of the assembling unit measuring point amplitude, Turbine Flow Passage differential pressure measuring point amplitude or spiral case differential pressure measuring point amplitude, Turbine Flow Passage inlet pressure measuring point amplitude or spiral case inlet pressure measuring point amplitude, draft tube outlet pressure measuring point amplitude is in interior efficiency test of turbine measuring point amplitude, and comprise guide vane opening, blade aperture, upper pool elevation, the level of tail water, machine class frequency, power factor is in interior background measuring point amplitude, according to above-mentioned each measuring point amplitude, use conventional Calculation Method, calculate the turbine efficiency of Kaplan turbine group, the turbine efficiency of the Kaplan turbine group that foundation calculates again, use conventional method, draw out the turbine efficiency under above-mentioned each stator operating mode---become the tendency chart of blade aperture, then,---become blade aperture tendency chart and carry out matching, the turbine efficiency of described each stator operating mode---change blade aperture tendency chart will be into determining that in each stator operating mode, the more excellent blade operating point of turbine efficiency provide foundation to use method of least squares to the turbine efficiency under drawn out each stator operating mode,
(7.2.2), arrange Kaplan turbine organizing, stability test data, use conventional method, each change blade operating mode efficiency test of turbine data that each stator operating mode measuring point of arrangement step (7.1) record measures, obtain comprising unit vibration measuring point amplitude, unit throw measuring point amplitude, water turbine pressure pulsation measuring point amplitude is in interior water turbine organizing, stability test measuring point amplitude, and comprise guide vane opening, blade aperture, upper pool elevation, the level of tail water, machine class frequency, power factor is in interior background measuring point amplitude, according to above-mentioned each measuring point amplitude, use conventional method, draw out the stability test measuring point amplitude under above-mentioned each stator operating mode---become the tendency chart of blade aperture, described each stator operating mode stability inferior test measuring point amplitude---becoming blade aperture tendency chart will be into determining that in each stator operating mode, the more excellent blade operating point of water turbine organizing, stability provides foundation,
(7.3), determine optimum blade aperture,
(7.3.1), determine little guide vane opening operating mode joint relation, treat that according to step (4) is determined the Kaplan turbine joint of complex optimum test is related to the principle of complex optimum, the each change blade operating mode efficiency test of turbine data that measure according to step (7.1) each stator operating mode measuring point that obtains; Basis for selecting step (7.2.2) the stability test measuring point amplitude under each stator operating mode of painting---become the tendency chart of blade aperture, use conventional method, selecting the blade aperture that measuring point amplitude is less than the blade of former on-cam operating condition measuring point amplitude and amplitude minimum is optimum blade aperture, according to the above principle successively optimum blade aperture of definite all the other guide vane openings;
(7.3.2), determine large guide vane opening operating mode joint relation, treat that according to step (4) is determined the Kaplan turbine joint of complex optimum test is related to the principle of complex optimum, the each change blade operating mode efficiency test of turbine data that measure according to step (7.1) each stator operating mode measuring point that obtains, turbine efficiency under above-mentioned each stator operating mode of drawing out according to step (7.2.1)---become the tendency chart of blade aperture, use conventional method, select 2～3 the blade apertures of turbine efficiency higher than former on-cam operating condition point turbine efficiency under above-mentioned stator operating mode undetermined, again in blade aperture operating mode to be selected, according to step (7.2.2) the stability test measuring point amplitude under each stator operating mode of painting---become the tendency chart of blade aperture, select the increase of stability test measuring point amplitude and do not exceed the determined unit vibration measuring point of step (3), unit throw measuring point, the amplitude of water turbine pressure pulsation measuring point increases the blade aperture of threshold values, for the optimum blade aperture under guide vane opening undetermined, determine successively the optimum blade aperture of all the other guide vane openings according to above principle,
(7.4), optimize joint relation curve, the optimum blade aperture of each guide vane opening of selecting according to step (7.3), use conventional method, draw out blade under described each head and the relation curve of guide vane opening, adopt least square fitting method that the combination curve under described each head is carried out to matching optimization process, so that combination curve is smooth, regularity is stronger.
Priority Applications (1)
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| CN105068424A (en) * | 2015-08-05 | 2015-11-18 | 武汉大学 | Kaplan turbine adjusting system dynamic model suitable for electric power system analysis |
| CN108616142A (en) * | 2018-04-11 | 2018-10-02 | 中国长江电力股份有限公司 | A kind of governor head opens limit combination curve self-adaptation control method with load |
| CN108708818A (en) * | 2018-04-11 | 2018-10-26 | 中国长江电力股份有限公司 | A kind of governor head and no-load opening combination curve self-correction self-adaptation control method |
| CN110848069A (en) * | 2019-10-28 | 2020-02-28 | 大唐水电科学技术研究院有限公司 | Novel testing method for optimal collaborative curve of unit |
| CN111734576A (en) * | 2020-05-27 | 2020-10-02 | 怀化沅江电力开发有限责任公司洪江水力发电厂 | Coordinated optimization method and system for blades of water turbine speed regulator with refining and distinguishing functions |
| CN112733455A (en) * | 2021-01-15 | 2021-04-30 | 五凌电力有限公司株溪口水电厂 | Correction method, system, device and storage medium of water turbine modeling data |
| CN114704418A (en) * | 2021-12-22 | 2022-07-05 | 黄河水利水电开发集团有限公司 | Hydraulic generator state monitoring system and speed regulator joint relation optimization method thereof |
| CN115370522A (en) * | 2022-09-09 | 2022-11-22 | 中国长江电力股份有限公司 | Test method for simulating real machine fault on model water turbine |
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| CN112733455B (en) * | 2021-01-15 | 2022-02-08 | 五凌电力有限公司株溪口水电厂 | Correction method, system, device and storage medium of water turbine modeling data |
| CN114704418A (en) * | 2021-12-22 | 2022-07-05 | 黄河水利水电开发集团有限公司 | Hydraulic generator state monitoring system and speed regulator joint relation optimization method thereof |
| CN114704418B (en) * | 2021-12-22 | 2024-05-10 | 黄河水利水电开发集团有限公司 | Hydraulic generator state monitoring system and speed regulator cooperative connection relation optimization method thereof |
| CN115370522A (en) * | 2022-09-09 | 2022-11-22 | 中国长江电力股份有限公司 | Test method for simulating real machine fault on model water turbine |
| CN115370522B (en) * | 2022-09-09 | 2024-03-29 | 中国长江电力股份有限公司 | Test method for simulating true machine fault on model water turbine |
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