CN108798987B - tidal current energy generator set and generator steering control monitoring method thereof - Google Patents
tidal current energy generator set and generator steering control monitoring method thereof Download PDFInfo
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- CN108798987B CN108798987B CN201810595977.0A CN201810595977A CN108798987B CN 108798987 B CN108798987 B CN 108798987B CN 201810595977 A CN201810595977 A CN 201810595977A CN 108798987 B CN108798987 B CN 108798987B
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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
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
- F03B13/26—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using tide energy
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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
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/008—Measuring or testing arrangements
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2220/00—Application
- F05B2220/70—Application in combination with
- F05B2220/706—Application in combination with an electrical generator
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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
-
- 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
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
Abstract
The invention discloses tidal current energy generating sets and a generator steering control monitoring method thereof, wherein the tidal current energy generating sets are of a horizontal shaft type, a positive and negative rotation system of a pitch-variable generator with the angle of 0-270 degrees is adopted, the method comprises the steps that if the average flow direction of a short time is 0-180 degrees and the pitch angle of the generating set is-5-95 degrees, a main control system gives a converter to control the rotation speed direction of the generator to rotate anticlockwise and positively, if the average flow direction of the short time is not 0-180 degrees and the pitch angle of the generating set is 175-275 degrees, the main control system gives the converter to control the rotation speed direction of the generator to rotate clockwise and reversely, and the judgment can be carried out by comparing a positive and negative rotation instruction of the generator given by the main control system with the rotation direction of the generator actually fed back by a generator encoder in advance steps.
Description
Technical Field
The invention relates to the technical field of tidal current energy power generation, in particular to tidal current energy generator sets and a generator steering control monitoring method thereof.
Background
The tide is a periodic seawater fluctuation phenomenon formed by the seawater under the action of gravity such as moon, sun and the like, and the seawater tide is accompanied by two motion forms, wherein refers to the seawater vertical lifting caused by the rising tide and the falling tide, namely the tide, and the seawater horizontal motion refers to the tide, namely the tide, the energy carried by the tide is potential energy, and the energy carried by the tide is kinetic energy.
The tidal current energy power generation has the characteristics that tidal current energy is renewable clean energy, the energy density of the tidal current energy is far greater than that of wind energy, the tidal current energy is energy which can change along with space and time, the change regularity is obvious, prediction and prediction can be carried out, the tidal current energy power generation does not need dam building like a hydropower station, and the influence on the ocean environment is small.
The existing tidal current energy generating set is generally a non-yaw system and mainly adopts a unidirectional rotating generating device, wherein the unidirectional rotating generating device only captures the energy of unidirectional tidal current and wastes tidal current energy resources, therefore, the applicant designs a bidirectional rotating generating device aiming at the situation, can capture the energy when bidirectional inflow is realized through a large-angle variable pitch system, and greatly improves the utilization rate of tidal current energy resources, but currently, no actual bidirectional switching method exists for the bidirectional rotating generating device, is generally manual operation forward and reverse switching, and manual operation generally lacks judgment basis and is easy to generate misjudgment, so that faults occur and shutdown is needed to miss partial tidal current energy resources.
Therefore, the conventional tidal current energy generator set has inconvenience and defects in forward and reverse rotation control monitoring, and needs to be improved by , so how to create tidal current energy generator sets and generator steering control monitoring methods thereof, which can efficiently utilize tidal current energy resources in bidirectional incoming flow and realize safe and stable operation, becomes an urgent need for improvement in the current industry.
Disclosure of Invention
The invention aims to solve the technical problem of providing tidal current energy generator sets capable of efficiently utilizing tidal current energy resources in bidirectional incoming flow and realizing safe and stable operation and a generator steering control monitoring method thereof.
In order to solve the technical problems, the invention adopts the following technical scheme:
, the invention provides methods for controlling and monitoring the turning of a generator of a tidal current energy generator set, wherein the tidal current energy generator set is of a horizontal shaft type and adopts a positive and negative turning system of a variable-pitch generator with the angle of 0-270 degrees, and the method comprises the following steps:
when the average flow direction in a short time is 0-180 degrees and the pitch angle of the generator set is-5-95 degrees, the master control system gives a flag bit that the rotating speed direction of the converter generator rotates anticlockwise and positively;
and when the average flow direction is not between 0 and 180 degrees in a short time and the pitch angle of the generator set is between 175 and 275 degrees, the main control system gives the rotating speed direction of the converter generator as a flag bit of clockwise reverse rotation.
According to the invention, the method is improved by , firstly, judgment is carried out according to the short-time average flow direction, then, judgment is carried out by , and if the corresponding pitch angle condition is not met, the judgment is returned to the short-time average flow direction judgment.
And , the short-time average flow direction is 3-10min average flow direction.
And , the short-time average flow direction is 5min average flow direction.
, the method for monitoring generator steering control of tidal current energy generator set further comprises:
the generator positive and negative rotation instruction given by the main control system is compared with the generator rotation direction actually fed back by the generator encoder, if the result is not , the generator positive and negative rotation instruction is compared with a preset generator rotation speed limit value in the flat tide period, and when the generator rotation speed limit value exceeds the generator rotation speed limit value in the flat tide period, the fault shutdown is required.
, the generator speed limit during the flat tide is 45-55 RPM/s.
, the flat-tide generator speed limit is 50 RPM/s.
In addition , the invention provides tidal current energy generator sets, which comprise a main control system, and a variable pitch system, a current transformer and a current meter which are connected with the main control system, wherein a computer program is stored in the main control system, and the steps of the method are realized when the main control system executes the computer program.
, the tidal current energy generator set is of a horizontal shaft type, and a positive and negative rotation system of a pitch-variable generator with the angle of 0-270 degrees is adopted.
, the tidal current energy generator set is a horizontal shaft type two-blade generator set.
By adopting the technical scheme, the invention at least has the following advantages:
1. the invention provides automatic control and monitoring methods of the rotating speed direction of the generator during the operation of flood tide ebb tide power generation aiming at the tidal current energy generator set adopting a horizontal shaft type, 0-270 degree variable pitch generator positive and negative rotation system, avoids the defects caused by manual operation positive and negative rotation switching, can efficiently utilize tidal current energy resources during bidirectional incoming flow, and simultaneously provides an automatic judgment method aiming at the switching of the rotating speed direction of the generator during the shutdown in the calm tide period, avoids non-fault shutdown and realizes the safe and stable operation of the generator set.
2. A large number of experiments prove that the short-time average flow direction, particularly the 5min average flow direction is used as a judgment basis, the judgment is accurate, and the switching accuracy is greatly improved.
3. According to the invention, long-term experiments show that the misjudgment rate is lowest when the limit value of the rotating speed of the generator in the calm tide period is 50 RPM/s.
Drawings
The foregoing is merely an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood, the present invention is further described in with reference to the accompanying drawings and the detailed description.
FIG. 1 is a flowchart of a master control system program for setting forward and reverse rotation flag bits of a generator;
fig. 2 is a flow chart of the master control system monitoring the generator positive and negative rotation program failure.
Detailed Description
The invention mainly aims at a tidal current energy generator set of a self-designed horizontal shaft type, two blades and a positive and negative rotation system of a 0-270-degree variable pitch generator in the process of developing a tidal current energy unit, and designs generator steering control monitoring methods for the tidal current energy generator set so as to solve the problems of controlling and monitoring the generator steering during the flood tide, the ebb tide and the flat tide of the generator set.
() the master control system gives the positive and negative rotation flag bit of the generator, and the cooperation is shown in figure 1:
(1) because the flow direction of the seawater is different and is relatively stable when the seawater rises and falls. Therefore, the flow direction is firstly collected and judged. The method adopts short-time average flow direction for judgment, and the range of the short-time average flow direction is 0-360 degrees, when the short-time average flow direction is within 0-180 degrees, the short-time average flow direction is defined as the ebb-tide flow direction range, and when the short-time average flow direction is within 180-360 degrees, the short-time average flow direction is defined as the ebb-tide flow direction range. A large number of experiments prove that the average flow direction of 3-10min, particularly the average flow direction of 5min is used as a judgment basis, the judgment is accurate, and the switching accuracy can be greatly improved.
(2) The machine set is provided with a 0-270-degree pitch-variable system, the pitch angle is adjusted at 0-90 degrees in the ebb tide process, and the pitch angle is adjusted at 180-270 degrees in the ebb tide process. Through the change of the blade pitch angle, the absorption of tidal current energy is adjusted, and then the generator is driven to rotate to generate electricity. Therefore, the master control system gives the generator forward and reverse rotation flag bits, and the state of the pitch angle needs to be judged. On the premise that the flow direction condition is met, when the pitch angle is-5-95 degrees, the generator is stressed to rotate anticlockwise (positive direction), and the main control system gives the generator rotation direction flag bit to be 1 (representing anticlockwise positive direction rotation). When the pitch angle is 175 ° -275 °, the generator is to rotate clockwise (in reverse), and the main control system gives the generator rotation direction flag a value of-1 (clockwise).
Generally, the operation pitch angle of the unit runs in the interval of 0-90 degrees and 180-270 degrees, but because a pitch control system outputs a pitch angle instruction after PI adjustment through the difference of rotating speed, a pitch control actuating mechanism is given to realize pitch angle adjustment. The pitch angle PI adjustment has overshoot, so that the judgment ranges of the ebb pitch angle-5-95 degrees and the ebb pitch angle 175-275 degrees are given.
(II) the master control system monitors the positive and negative rotation program faults of the generator, and is matched with the method shown in figure 2:
the main control system monitors the general idea of the forward and reverse rotation program fault of the generator, the forward and reverse rotation zone bit instruction of the generator given by the main control system is compared with the rotation direction of the generator actually fed back by the encoder of the generator, and if the forward and reverse rotation zone bit instruction of the generator is not , the fault shutdown is required.
When the direction of the generator actually fed back by the generator encoder is counterclockwise (forward), and the flag bit of the generator given by the master control system is also counterclockwise (forward), the generator is in a normal state. Similarly, when the direction of the generator actually fed back by the generator encoder is clockwise (reverse), and the flag bit of the generator given by the master control system is also clockwise (reverse), the generator is also in a normal state. The other states than the above two states are abnormal states.
When the unit is on the flat tide, the unit needs to be stopped to change the pitch angle so as to meet the flow direction of the rising tide and the falling tide. The pitch angle of the generator is 95-175 degrees, but the generator has a low rotating speed due to the low flow rate and the low rotating speed in the flat tide period, so that the fault condition can be avoided by setting a limit value for the rotating speed of the generator in the flat tide period.
The method is characterized in that a limit value of 45-55RPM/S is set for the rotating speed of a generator in the flat period, preferably, the limit value is realized by that 1S average generator rotating speed variable GenSpeed 1S is more than or equal to 50RPM (the designed grid-connected rotating speed of a unit is 122RPM, and the rated rotating speed is 301 RPM). if the conditions are met, the unit reports the error steering fault of the generator, the generator is stopped, and the pitch angle receives a safe position, namely, when the actual generator direction fed back by a generator encoder and a given generator flag bit of a main control system are not , the actual generator direction is compared with the preset limit value of the rotating speed of the generator in the flat period, and when the limit value of the rotating speed of the generator in the flat period is.
In addition, the invention also provides tidal current energy generator sets which are horizontal shaft type tidal current energy generator sets with two blades and a positive and negative rotation system of a 0-270-degree variable pitch generator, and the tidal current energy generator sets comprise a main control system, a variable pitch system, a current transformer and a current meter (used for measuring the flow direction) which are connected with the main control system, wherein a computer program is stored in the main control system, and the steps of the control monitoring method are realized when the main control system executes the computer program.
The tidal current energy generator set and the generator steering control monitoring method thereof are automatic control monitoring methods, avoid the defects caused by manual operation of forward and reverse switching, can efficiently utilize tidal current energy resources in bidirectional incoming flow, provide an automatic judgment method for the switching of the rotating speed direction of the generator during the shutdown in the calm period, avoid non-fault shutdown, realize the safe and stable operation of the generator set, and are suitable for pushing .
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention in any way, and it will be apparent to those skilled in the art that the above description of the present invention can be applied to various modifications, equivalent variations or modifications without departing from the spirit and scope of the present invention.
Claims (9)
- The generator steering control monitoring method of the tidal current energy generator set is characterized in that the tidal current energy generator set is of a horizontal shaft type, and a positive and negative rotation system of a variable-pitch generator with the angle of 0-270 degrees is adopted, wherein the method comprises the following steps:when the average flow direction in a short time is 0-180 degrees and the pitch angle of the generator set is-5-95 degrees, the master control system gives a flag bit that the rotating speed direction of the converter generator rotates anticlockwise and positively;when the average flow direction in a short time is not between 0 and 180 degrees and the pitch angle of the generator set is between 175 and 275 degrees, the master control system gives a flag bit that the rotating speed direction of the generator of the converter is clockwise and reversely rotated;the method further comprises the following steps:the generator positive and negative rotation instruction given by the main control system is compared with the generator rotation direction actually fed back by the generator encoder, if the result is not , the generator positive and negative rotation instruction is compared with a preset generator rotation speed limit value in the flat tide period, and when the generator rotation speed limit value exceeds the generator rotation speed limit value in the flat tide period, the fault shutdown is required.
- 2. The method for monitoring generator steering control of a tidal current energy generator set according to claim 1, wherein the judgment is performed according to the short-time average flow direction, and the judgment is performed according to the pitch angle of the generator set in step , and if the corresponding pitch angle condition is not met, the judgment is returned to the short-time average flow direction judgment.
- 3. The method for monitoring generator steering control of a tidal current energy generator set according to claim 1, wherein the short-time average flow direction is 3-10min average flow direction.
- 4. The method for monitoring generator steering control of a tidal current energy generator set according to claim 3, wherein the short-time average flow direction is a 5min average flow direction.
- 5. The method for monitoring generator steering control of a tidal current energy Generator set of claim 1, wherein the generator speed limit during the flat period is 45-55 RPM/s.
- 6. The tidal current energy Generator set generator steering control monitoring method of claim 5, wherein the flat-term generator speed limit is 50 RPM/s.
- 7, tidal current energy generator sets, which are characterized by comprising a master control system, a variable pitch system, a current transformer and a current meter, wherein the variable pitch system, the current transformer and the current meter are connected with the master control system;a computer program is stored in the master control system, and when the computer program is executed by the master control system, the method steps of in any of claims 1-6 are implemented.
- 8. The tidal current energy power generation set of claim 7, wherein the tidal current energy power generation set is of a horizontal axis type, and a positive and negative rotation system of a pitch-variable generator of 0-270 ° is adopted.
- 9. The tidal current energy generator set of claim 8, wherein the tidal current energy generator set is a horizontal-axis two-bladed generator set.
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| GB201114677D0 (en) * | 2011-08-25 | 2011-10-12 | Brown Donald E | Fluid flow capture & drive transfer |
| CN203146217U (en) * | 2013-03-29 | 2013-08-21 | 浙江海洋学院 | Flow-guide-type automatically-direction-adjusting variable-pitch horizontal-shaft tidal current energy water turbine |
| CN104454325A (en) * | 2014-10-24 | 2015-03-25 | 国电联合动力技术有限公司 | Variable pitch method for tidal current energy generating set |
| CN106870268A (en) * | 2015-12-10 | 2017-06-20 | 柳州市京阳节能科技研发有限公司 | Optimization high-efficient energy-saving environment friendly tidal power generation unit |
| CN107131093A (en) * | 2017-07-14 | 2017-09-05 | 国电联合动力技术有限公司 | A kind of Ocean Tidal Current Energy electricity generation system |
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