CN112696837B - Debugging and control method for tower type photo-thermal power station - Google Patents
Debugging and control method for tower type photo-thermal power station Download PDFInfo
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- CN112696837B CN112696837B CN202011564695.8A CN202011564695A CN112696837B CN 112696837 B CN112696837 B CN 112696837B CN 202011564695 A CN202011564695 A CN 202011564695A CN 112696837 B CN112696837 B CN 112696837B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S50/00—Arrangements for controlling solar heat collectors
- F24S50/20—Arrangements for controlling solar heat collectors for tracking
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
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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
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/47—Mountings or tracking
Abstract
The invention provides a debugging and control method of a tower type photo-thermal power station, which is characterized in that a horizontal rotation hydraulic drive module is controlled to operate based on a control instruction sent by a monitoring system, and the horizontal rotation hydraulic drive module moves in a full scale in a pitching direction so as to determine the full scale and zero position of the pitching angle of a current heliostat; moving in the rotating direction, and acquiring full-scale movement in the rotating azimuth angle so as to determine the full scale and zero position of the rotating azimuth angle of the current heliostat; comparing and judging whether pitch angle deviations exist; and then comparing and judging whether the rotating azimuth angle deviation exists, and if the rotating azimuth angle deviation exists, correcting the rotating azimuth angle deviation beyond a preset range. By debugging and testing the control angle of the heliostat, the tracking mode of the position of the sun is determined, and the accuracy of the system is improved based on the correction of the historical meteorological data of each local month. Through the test to heliostat control mode, data have been revised, make heliostat developments track the position of sun, and then guarantee tower light and heat power station's generating capacity and generating efficiency.
Description
Technical Field
The invention relates to the technical field of heliostats, in particular to a debugging and control method for a tower type photo-thermal power station.
Background
A heliostat refers to an optical device that reflects light from the sun or other celestial body in a fixed direction.
And the tower type photo-thermal power station reflects sunlight to the heat absorber through large-scale heliostat display. The heat absorber heats the heat exchange molten salt after being heated. The heated molten salt is transferred to an SGS system (namely a steam generation system) for heat exchange, and the feed water is converted into high-temperature and high-pressure steam, so that a steam turbine generator unit is pushed to generate electric power to the outside.
In the aspect of service efficiency and performance of the tower-type photo-thermal power station, the dynamic position of the sun is tracked by the heliostat, if the heliostat is inaccurate in positioning control or inaccurate in positioning control, the power generation capacity and the power generation efficiency of the tower-type photo-thermal power station can be influenced, how to enable the heliostat to dynamically track the position of the sun, and further the power generation capacity and the power generation efficiency of the tower-type photo-thermal power station are the current technical problems to be solved urgently.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a debugging and control method for a tower type photo-thermal power station, which comprises the following steps: a heliostat assembly and a monitoring system;
the heliostat assembly is provided with a heliostat and an upright post, the top end of the upright post is connected with a rotary supporting mechanism, and the heliostat is arranged on the rotary supporting mechanism;
the bottom end of the upright post is fixedly connected with the ground;
the rotary supporting mechanism is provided with a supporting beam, a pitching driving component and a horizontal rotation driving component;
the pitching driving component is provided with a pitching hydraulic driving module and a pitching linkage gear;
the pitching hydraulic driving module is in meshed connection with the gear on the supporting beam through a pitching linkage gear;
the horizontal rotation driving component is provided with a horizontal rotation hydraulic driving module and a horizontal rotation linkage gear;
the horizontal rotation hydraulic driving module is connected with the top end of the upright post through a horizontal rotation linkage gear;
the method comprises the following steps;
the heliostat assembly controls the pitching hydraulic driving module to operate based on a control instruction sent by the monitoring system, so that the pitching hydraulic driving module exhausts air in the hydraulic system;
the horizontal rotation hydraulic driving module is also controlled to operate, so that the horizontal rotation hydraulic driving module discharges air in the hydraulic system;
controlling the pitching hydraulic drive module to operate, and performing full-scale movement in the pitching direction so as to determine the full degree and zero position of the current heliostat pitching angle;
moving in the rotating direction, and acquiring full-scale movement in the rotating azimuth angle so as to determine the full scale and zero position of the rotating azimuth angle of the current heliostat;
respectively comparing the fullness and zero position correspondence of the pitch angle of the current heliostat with a preset threshold value to judge whether pitch angle deviations exist and whether the pitch angle deviations are within a preset range; if the pitch angle deviation exceeds a preset range, correcting;
respectively comparing the fullness and the zero position correspondence of the current rotation azimuth angle of the heliostat with a preset threshold value to judge whether rotation azimuth angle deviations exist or not and whether the rotation azimuth angle deviations are within a preset range or not; if the deviation of the rotation azimuth angle exceeds the preset range, correction is carried out.
It should be further noted that the monitoring system gives a calibration coordinate point to the heliostat and sends a calibration command, and the heliostat is required to be able to reflect the light spot to the calibration area, otherwise, the heliostat is manually adjusted so as to calculate a valve position correction value; the null of the mirror rotational azimuth is-170 °; the fullness is + 170.
It is further noted that the method further comprises:
before the SFCS system is powered on, the wiring in the power supply cabinet, the control cabinet and the communication cabinet is verified and confirmed according to the wiring drawing in the SFCS cabinet, and then the system is powered on;
after the system is powered on, the SFCS system is subjected to software configuration and installation, a display interface and background logic of the SFCS system are checked, and whether the operating parameters of the SFCS system exceed a preset threshold value is detected;
the SFCS system is checked for good communication with the weather station and the electrical equipment involved in the heliostat.
It is further noted that the method further comprises:
calibrating the heliostat by using an HCS system to enable the error between the light spot reflected by the heliostat and a calibration target point to be within a preset range;
after the calibration is completed, the IR system is used to test the calibration result:
and extracting a preset number of heliostats to focus on the heat absorber, and detecting a focusing result according to a preset heliostat focusing point.
It is further noted that the static and dynamic tests of protection tripping are performed on cloudy days, and the detection of the communication signals between the heliostat assembly and the distributed control system is performed;
utilizing cloudy days to carry out heat absorber preheating and power mode logic test;
the heliostat assembly and the heat absorber are in linkage trial operation and are preheated;
the heat absorber preheating method includes: the method comprises the following steps that a heliostat assembly is put into a preheating mode, the heliostat is called to preheat a heat absorber, and operation parameters after preheating are judged to be within a preset threshold range;
if the temperature and the humidity are all within the preset threshold range, the salt is filled in the heat absorber after preheating is finished;
and after the salt is charged, carrying out power test on the heliostat assembly, and monitoring whether the generated power meets a preset power preset threshold value within a preset working temperature threshold value range of the heliostat assembly.
It should be further noted that, a camera is arranged at a preset position on site to obtain video data information on site;
establishing data communication between a monitoring system and cameras, acquiring images shot by each camera, identifying the definition of a target object in the shot images, and judging whether the definition and the shot target object meet preset requirements;
according to a preset communication point-to-point mapping table and a communication protocol, data communication between the HCS system and the SFCS system is realized, whether a communication signal is smooth or not is judged, and whether point-to-point communication meets the preset requirements of the mapping table and the communication protocol or not is judged;
if not, carrying out semi-automatic running state and manual running state on the found problems, and debugging;
and adjusting parameters and eliminating defects according to the actual situation of the site.
It should be further noted that data communication between the upper computer and the infrared camera is established, and the image recognition area of the image of the single camera is adjusted.
According to the point table and the communication protocol, the communication of data between the IR system and the DCS system and the data intercommunication from the DCS system to the SFCS system are realized.
And adjusting parameters and eliminating defects according to the actual situation of the site.
It is further noted that the method further comprises: the method further comprises the following steps after the step of controlling the operation of the pitching hydraulic driving module and the step of full-scale movement in the pitching direction so as to determine the full scale and the zero position of the pitch angle of the current heliostat:
after the heliostat assembly meets the requirement in the pitching direction, controlling the reflection angle of the heliostat assembly:
the method comprises the steps that an SFCS system obtains a GPS clock, the sun position is calculated according to the longitude and the latitude where a heliostat assembly is located, then according to the relative position between the heliostat assembly and a heat absorber, the position values of the altitude angle and the azimuth angle in the tracking process of the heliostat are compared according to a set latitude function X (t) and a longitude function Y (t) respectively through two decoupled closed-loop control loops, the tracking of the heliostat is controlled, and light spots are reflected to the heat absorber.
It should be further noted that the manner of performing the power test on the heliostat assembly includes:
solving the efficiency of the heliostat at a certain moment when the heliostat works in the daytime by a linear interpolation mode to obtain the light power at the moment; the sum of all heliostat powers in the focusing state is the total power of the heliostat components.
It should be further noted that the method also includes a method for calculating the actual generated power:
based on a DCS system, a temperature sensor and a flowmeter are arranged at a molten salt inlet and a molten salt outlet of each heat absorber;
calculating the actual heat absorption power of each heat absorber fused salt by the following formula, and transmitting the actual heat absorption power to the server for correcting the actual generated power of the heliostat
According to the technical scheme, the invention has the following advantages:
the debugging and control method of the tower type photo-thermal power station determines the tracking mode of the sun position through debugging and testing the control angle of the heliostat, and improves the precision of the system based on the correction of the historical meteorological data of each month. Through the test to heliostat control mode, data have been revised, make heliostat developments track the position of sun, and then guarantee tower light and heat power station's generating capacity and generating efficiency.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a flow chart of a method for debugging and controlling a tower type photo-thermal power station;
FIG. 2 is a schematic diagram of an embodiment of a debugging and control method of the tower type photo-thermal power station.
Detailed Description
The invention provides a debugging and control method for a tower type photo-thermal power station, which comprises the following steps as shown in figures 1 and 2: a heliostat assembly and a monitoring system; the heliostat assembly is provided with a heliostat and an upright post, the top end of the upright post is connected with a rotary supporting mechanism, and the heliostat is arranged on the rotary supporting mechanism;
the bottom end of the upright post is fixedly connected with the ground; the rotary supporting mechanism is provided with a supporting beam, a pitching driving component and a horizontal rotation driving component; the pitching driving component is provided with a pitching hydraulic driving module and a pitching linkage gear; the pitching hydraulic driving module is in meshed connection with the gear on the supporting beam through a pitching linkage gear; the horizontal rotation driving component is provided with a horizontal rotation hydraulic driving module and a horizontal rotation linkage gear; the horizontal rotation hydraulic driving module is connected with the top end of the upright post through a horizontal rotation linkage gear;
the horizontal rotation hydraulic driving module can adopt a gear meshing mode or a hinge mode or a bearing mode and the like through a horizontal rotation linkage gear and the connection mode of the top end of the upright post.
The method comprises the following steps;
s11, the heliostat assembly controls the pitching hydraulic driving module to operate based on a control instruction sent by the monitoring system, so that the pitching hydraulic driving module exhausts air in the hydraulic system;
s12, controlling the horizontal rotation hydraulic driving module to operate, and enabling the horizontal rotation hydraulic driving module to exhaust air in the hydraulic system;
s13, controlling the operation of the pitching hydraulic drive module, and performing full-scale movement in the pitching direction so as to determine the full degree and zero position of the current heliostat pitching angle;
s14, moving in the rotating direction, acquiring the full scale movement in the rotating direction angle, so as to determine the full scale and zero position of the rotating direction angle of the current heliostat;
s15, respectively comparing the fullness and the zero position correspondence of the pitch angle of the current heliostat with a preset threshold value to judge whether pitch angle deviations exist and whether the pitch angle deviations are within a preset range; if the pitch angle deviation exceeds a preset range, correcting;
s16, comparing the fullness and the zero position correspondence of the current rotation azimuth angle of the heliostat with a preset threshold value respectively to judge whether rotation azimuth angle deviations exist or not and whether the rotation azimuth angle deviations are within a preset range or not; if the deviation of the rotation azimuth angle exceeds the preset range, correction is carried out.
The monitoring system gives a calibration coordinate point to the heliostat and sends a calibration command, the heliostat is required to be capable of reflecting light spots to a calibration area, and otherwise, manual adjustment is carried out so as to calculate a valve position correction value; the null of the mirror rotational azimuth is-170 °; the fullness is + 170.
The driving module on the heliostat component can adopt a motor driving mode or a pneumatic driving mode instead of a hydraulic mode.
The fullness of the heliostat assembly based on the pitching direction and the rotating direction is tested, the angle adjustment is met, and the problem that the heliostat assembly cannot normally operate in the angle adjustment process is solved.
With respect to the tower photo-thermal power plant commissioning and control method provided by the present invention, those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both, and in the above description the components and steps of the examples have been generally described in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electric, mechanical or other form of connection.
The suffixes for the tower photothermal power plant commissioning and control method provided by the present invention to indicate elements such as "module", "component" or "unit" are merely to facilitate the description of the embodiments of the present invention and are not in themselves of particular significance. Thus, "module" and "component" may be used in a mixture.
As an embodiment provided by the present invention, the method further comprises:
before an SFCS (Small Field Control System) System is powered on, checking and confirming the wiring in a power supply cabinet, a Control cabinet and a communication cabinet according to a wiring drawing in the SFCS cabinet, and then powering on;
after the system is powered on, the SFCS system is subjected to software configuration and installation, a display interface and background logic of the SFCS system are checked, and whether the operating parameters of the SFCS system exceed a preset threshold value is detected; this ensures that the SFCS system operates properly. The SFCS system can be configured in the system for use according to actual needs based on the monitoring system.
The SFCS system is checked for good communication with the weather station and the electrical equipment involved in the heliostat.
And tracking the debugging progress of the heliostat monomer, compiling a heliostat remote transmission acceptance sheet, and carrying out remote transmission acceptance of the heliostat together with an installation and monomer debugging unit.
After the heliostat is subjected to acceptance transmission, a heliostat SAT test acceptance table is compiled according to an SAT test (site acceptance test) file of the heliostat, tests such as path conversion and alarming are carried out on the heliostat, and all alarming and conversion paths must be correct.
As an embodiment provided by the present invention, the method further comprises: calibrating the Heliostat by using a HCS (Heliostat calibration system) system to enable the error between the light spot reflected by the Heliostat and the calibration target point to be within a preset range; after the calibration is completed, an IR system (Infrared temperature measurement system of a heat absorber) is used for testing a calibration result: and extracting a preset number of heliostats to focus on the heat absorber, and detecting a focusing result according to a preset heliostat focusing point.
The invention can compile a mirror field protection test logic card according to the mirror field control description, and reasonably utilize cloudy days to carry out static and dynamic tests of protection tripping. And checks the communication signals between the systems such as a mirror field and a conventional island DCS (Distributed Control System). The infrared temperature measurement system and the distributed control system of the heat absorber can be configured into the system in advance according to actual needs based on the monitoring system.
According to the invention, the static and dynamic tests of protection tripping are carried out on cloudy days, and the detection of the communication signals between the heliostat component and the distributed control system is carried out;
utilizing cloudy days to carry out heat absorber preheating and power mode logic test;
the heliostat assembly and the heat absorber are in linkage trial operation and are preheated; the heat absorber preheating method includes: the method comprises the following steps that a heliostat assembly is put into a preheating mode, the heliostat is called to preheat a heat absorber, and operation parameters after preheating are judged to be within a preset threshold range; if the temperature and the humidity are all within the preset threshold range, the salt is filled in the heat absorber after preheating is finished; and after the salt is charged, carrying out power test on the heliostat assembly, and monitoring whether the generated power meets a preset power preset threshold value within a preset working temperature threshold value range of the heliostat assembly.
As an embodiment provided by the invention, a camera is arranged at a preset position on site to acquire the information of the video data on site; establishing data communication between a monitoring system and cameras, acquiring images shot by each camera, identifying the definition of a target object in the shot images, and judging whether the definition and the shot target object meet preset requirements;
according to a preset communication point-to-point mapping table and a communication protocol, data communication between the HCS system and the SFCS system is realized, whether a communication signal is smooth or not is judged, and whether point-to-point communication meets the preset requirements of the mapping table and the communication protocol or not is judged;
if not, carrying out semi-automatic running state and manual running state on the found problems, and debugging;
and adjusting parameters and eliminating defects according to the actual situation of the site.
As an embodiment provided by the invention, data communication between the upper computer and the infrared camera is established, and the image identification area of the image of a single camera is adjusted.
According to the point table and the communication protocol, the communication of data between the IR system and the DCS system and the data intercommunication from the DCS system to the SFCS system are realized.
And adjusting parameters and eliminating defects according to the actual situation of the site.
In the embodiment provided by the invention, during construction, after three-way leveling is carried out on a field, hidden projects such as mirror field cable channel construction or embedding are firstly carried out, meanwhile, a mirror field power distribution room (E-house) is constructed, roads are constructed again, and finally, heliostats are installed.
When the heliostat is installed, the E-house bus can be connected with construction power or mobile diesel engine to supply power to the heliostat.
The mirror field is large in area and large in quantity, so that a mirror field can be arranged to temporarily debug a room. When the main factory building is put into use, the equipment is carried, and the corresponding power supply cable and the corresponding communication optical cable are displaced or discarded.
When the heliostat starts to be debugged, the meteorological station is required to be put into use firstly, and the wind speed protection can be ensured to play a role.
The heliostat mirror surface has serious dust accumulation, the reflection light spot is deformed, the brightness is insufficient, and the calibration work is seriously influenced, so the cleaning vehicle is required to be put in before the calibration.
After transmission acceptance, calibration can be carried out, so the calibration system and the SFCS should be put into use synchronously.
After remote calibration, direct focusing on the absorber is performed to check the positioning effect. Therefore, the civil construction of the light tower, the painting of the calibration area, the installation of the heat absorber and the application of the infrared temperature measurement system are the prerequisites.
The process flow of the tower type photo-thermal power station comprises the following steps: firstly, putting a mirror field into a preheating mode, calling a heliostat to preheat a heat absorber, and filling salt into the heat absorber after the temperature of each part of the heat absorber is within a proper range; when the salt filling is completed, the mirror field is switched to a power mode, and the heliostat is increased/decreased to respond to the power requirement of the DCS.
As an embodiment provided by the present invention, the method further comprises: the method further comprises the following steps after the step of controlling the operation of the pitching hydraulic driving module and the step of full-scale movement in the pitching direction so as to determine the full scale and the zero position of the pitch angle of the current heliostat:
after the heliostat assembly meets the requirement in the pitching direction, controlling the reflection angle of the heliostat assembly:
the method comprises the steps that an SFCS system obtains a GPS clock, the sun position is calculated according to the longitude and the latitude where a heliostat assembly is located, then according to the relative position between the heliostat assembly and a heat absorber, the position values of the altitude angle and the azimuth angle in the tracking process of the heliostat are compared according to a set latitude function X (t) and a longitude function Y (t) respectively through two decoupled closed-loop control loops, the tracking of the heliostat is controlled, and light spots are reflected to the heat absorber.
When the heliostat calculates the position of the sun, the angle of the heliostat component is calculated in the following mode;
the solar altitude angle (taking the level as an angle of 0 degree) is calculated by a formula:
the solar azimuth angle (with 0 degree angle in the south) is calculated by the formula:
wherein:
h: solar altitude;
a: the solar azimuth angle;
δ: the solar declination angle is calculated by a formula three;
δ＝23.45×sin(360×(284+n)/365)-------------------⑶
n is the product day, the number of days in the year, the number of days from 1 month and 1 day to the day to be calculated, namely the sequence number of the day to be calculated in the current year;
tau is a sun hour angle, has a time relation of 15 degrees/h, and is calculated by a formula fourth;
τ＝15×(ST-12)--------------------------------⑷
ST is when having the sun, counted in 24 hours, so the morning is negative, the afternoon is positive; calculating local time by using local longitude;
sun to heliostat calculation:
defining: the tower height is Z, the mirror center line height is T1, the length from the tower to the heliostat is X, and the width distance from the tower to the heliostat is Y;
the elevation angle H1 of the normal line of the heliostat is calculated by the formula;
Tan(Hl)＝(Z-Tl)/X----------------------------------⑸
calculating an azimuth angle Al of the normal of the heliostat according to the formula;
Tan(Al)＝Y/X----------------------------------⑹
since the angle of reflection is on the other side of the normal, then:
actual latitude function of mirror: x (t) ═ h + Hl/2- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Actual longitude function of mirror: y (t) ═ a + Al)/2-.
As an embodiment provided by the present invention, a manner of performing a power test on a heliostat assembly includes: solving the efficiency of the heliostat at a certain moment when the heliostat works in the daytime by a linear interpolation mode to obtain the light power at the moment; the sum of all heliostat powers in the focusing state is the total power of the heliostat components. And judging that the total power meets a preset threshold range, and if the total power does not meet the preset threshold range, debugging and adjusting can be carried out, so that the total power of the heliostat assembly can meet the requirement.
As an embodiment provided by the present invention, the method further includes a method for calculating the actual generated power: based on a DCS system, a temperature sensor and a flowmeter are arranged at a molten salt inlet and a molten salt outlet of each heat absorber; calculating the actual heat absorption power of each heat absorber fused salt by the following formula, and transmitting the actual heat absorption power to the server for correcting the actual generated power of the heliostat
According to the invention, the tracking mode of the sun position is determined by debugging and testing the control angle of the heliostat, and the accuracy of the system is improved by taking the historical meteorological data of each month in the local as correction.
Through the test to heliostat control mode, data have been revised, make heliostat developments track the position of sun, and then guarantee tower light and heat power station's generating capacity and generating efficiency.
The method for debugging and controlling a tower type photo-thermal power station according to the present invention is a method for debugging and controlling a tower type photo-thermal power station, which is described in conjunction with the embodiments disclosed herein, and can be implemented in electronic hardware, computer software, or a combination of both, and in the above description, the components and steps of the various examples have been generally described in terms of functions in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A debugging and control method for a tower type photo-thermal power station is characterized by comprising the following steps: a heliostat assembly and a monitoring system;
the heliostat assembly is provided with a heliostat and an upright post, the top end of the upright post is connected with a rotary supporting mechanism, and the heliostat is arranged on the rotary supporting mechanism;
the bottom end of the upright post is fixedly connected with the ground;
the rotary supporting mechanism is provided with a supporting beam, a pitching driving component and a horizontal rotation driving component;
the pitching driving component is provided with a pitching hydraulic driving module and a pitching linkage gear;
the pitching hydraulic driving module is in meshed connection with the gear on the supporting beam through a pitching linkage gear;
the horizontal rotation driving component is provided with a horizontal rotation hydraulic driving module and a horizontal rotation linkage gear;
the horizontal rotation hydraulic driving module is connected with the top end of the upright post through a horizontal rotation linkage gear;
the method comprises the following steps;
the heliostat assembly controls the pitching hydraulic driving module to operate based on a control instruction sent by the monitoring system, so that the pitching hydraulic driving module exhausts air in the hydraulic system;
the horizontal rotation hydraulic driving module is also controlled to operate, so that the horizontal rotation hydraulic driving module discharges air in the hydraulic system;
controlling the pitching hydraulic drive module to operate, and performing full-scale movement in the pitching direction so as to determine the full degree and zero position of the current heliostat pitching angle;
moving in the rotating direction, and acquiring full-scale movement in the rotating azimuth angle so as to determine the full scale and zero position of the rotating azimuth angle of the current heliostat;
respectively comparing the fullness and zero position correspondence of the pitch angle of the current heliostat with a preset threshold value to judge whether pitch angle deviations exist and whether the pitch angle deviations are within a preset range; if the pitch angle deviation exceeds a preset range, correcting;
respectively comparing the fullness and the zero position correspondence of the current rotation azimuth angle of the heliostat with a preset threshold value to judge whether rotation azimuth angle deviations exist or not and whether the rotation azimuth angle deviations are within a preset range or not; if the rotating azimuth deviation exceeds a preset range, correcting;
the method further comprises the following steps:
calibrating the heliostat by using an HCS system to enable the error between the light spot reflected by the heliostat and a calibration target point to be within a preset range;
after the calibration is completed, the IR system is used to test the calibration result:
and extracting a preset number of heliostats to focus on the heat absorber, and detecting a focusing result according to a preset heliostat focusing point.
2. The method for debugging and controlling a tower-type photothermal power station of claim 1,
the monitoring system gives a calibration coordinate point to the heliostat and sends a calibration command, and the heliostat is required to be capable of reflecting the light spot to a calibration area, otherwise, manual adjustment is carried out; the null of the mirror rotational azimuth is-170 °; the fullness is + 170.
3. The method for debugging and controlling a tower-type photothermal power station of claim 1,
the method further comprises the following steps:
before the SFCS system is powered on, the wiring in the power supply cabinet, the control cabinet and the communication cabinet is verified and confirmed according to the wiring drawing in the SFCS cabinet, and then the system is powered on;
after the system is powered on, the SFCS system is subjected to software configuration and installation, a display interface and background logic of the SFCS system are checked, and whether the operating parameters of the SFCS system exceed a preset threshold value is detected;
the SFCS system is checked for good communication with the weather station and the electrical equipment involved in the heliostat.
4. The method for debugging and controlling a tower-type photothermal power station of claim 1,
performing static and dynamic tests of protection tripping by using cloudy days, and detecting a communication signal between a heliostat component and a distributed control system;
utilizing cloudy days to carry out heat absorber preheating and power mode logic test;
the heliostat assembly and the heat absorber are in linkage trial operation and are preheated;
the heat absorber preheating method includes: the method comprises the following steps that a heliostat assembly is put into a preheating mode, the heliostat is called to preheat a heat absorber, and operation parameters after preheating are judged to be within a preset threshold range;
if the temperature and the humidity are all within the preset threshold range, the salt is filled in the heat absorber after preheating is finished;
and after the salt is charged, carrying out power test on the heliostat assembly, and monitoring whether the generated power meets a preset power preset threshold value within a preset working temperature threshold value range of the heliostat assembly.
5. The method for debugging and controlling a tower-type photothermal power station of claim 1,
arranging a camera at a preset site to acquire site video data information;
establishing data communication between a monitoring system and cameras, acquiring images shot by each camera, identifying the definition of a target object in the shot images, and judging whether the definition and the shot target object meet preset requirements;
according to a preset communication point-to-point mapping table and a communication protocol, data communication between the HCS system and the SFCS system is realized, whether a communication signal is smooth or not is judged, and whether point-to-point communication meets the preset requirements of the mapping table and the communication protocol or not is judged;
if not, carrying out semi-automatic running state and manual running state on the found problems, and debugging;
and adjusting parameters and eliminating defects according to the actual situation of the site.
6. The method for commissioning and controlling a tower-type photothermal power station of claim 5,
establishing data communication between an upper computer and an infrared camera, and adjusting an image identification area of an image of a single camera;
according to a point table and a communication protocol, data communication between the IR and the DCS and data communication between the DCS and the SFCS are realized;
and adjusting parameters and eliminating defects according to the actual situation of the site.
7. The method for debugging and controlling a tower-type photothermal power station of claim 1,
the method further comprises the following steps: the method further comprises the following steps after the step of controlling the operation of the pitching hydraulic driving module and the step of full-scale movement in the pitching direction so as to determine the full scale and the zero position of the pitch angle of the current heliostat:
after the heliostat assembly meets the requirement in the pitching direction, controlling the reflection angle of the heliostat assembly:
the method comprises the steps that an SFCS system obtains a GPS clock, the sun position is calculated according to the longitude and the latitude where a heliostat assembly is located, then according to the relative position between the heliostat assembly and a heat absorber, the position values of the altitude angle and the azimuth angle in the tracking process of the heliostat are compared according to a set latitude function X (t) and a longitude function Y (t) respectively through two decoupled closed-loop control loops, the tracking of the heliostat is controlled, and light spots are reflected to the heat absorber.
8. The method for commissioning and controlling a tower-type photothermal power station of claim 4,
the power test mode of the heliostat component comprises the following steps:
solving the efficiency of the heliostat at a certain moment when the heliostat works in the daytime by a linear interpolation mode to obtain the light power at the moment; the sum of all heliostat powers in the focusing state is the total power of the heliostat components.
9. The method for debugging and controlling a tower-type photothermal power station of claim 1,
the method also comprises a calculation method of the actual generated power:
based on a DCS system, a temperature sensor and a flowmeter are arranged at a molten salt inlet and a molten salt outlet of each heat absorber;
calculating the actual heat absorption power of each heat absorber fused salt by the following formula, and transmitting the actual heat absorption power to the server for correcting the actual generated power of the heliostat
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