CN116295816A - Automatic measurement method for solar radiation quantity of heliostat - Google Patents
Automatic measurement method for solar radiation quantity of heliostat Download PDFInfo
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- CN116295816A CN116295816A CN202310109039.6A CN202310109039A CN116295816A CN 116295816 A CN116295816 A CN 116295816A CN 202310109039 A CN202310109039 A CN 202310109039A CN 116295816 A CN116295816 A CN 116295816A
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- heliostat
- solar radiation
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- radiation quantity
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- 230000005855 radiation Effects 0.000 title claims abstract description 49
- 238000000691 measurement method Methods 0.000 title claims abstract description 11
- 238000010248 power generation Methods 0.000 claims abstract description 18
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 238000004891 communication Methods 0.000 claims abstract description 8
- 230000003287 optical effect Effects 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 10
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/0242—Control or determination of height or angle information of sensors or receivers; Goniophotometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/0266—Field-of-view determination; Aiming or pointing of a photometer; Adjusting alignment; Encoding angular position; Size of the measurement area; Position tracking; Photodetection involving different fields of view for a single detector
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J2001/4266—Photometry, e.g. photographic exposure meter using electric radiation detectors for measuring solar light
Abstract
The invention belongs to the technical field of photo-thermal power generation, and particularly discloses an automatic measurement method of solar radiation quantity for heliostats, which adopts a measurement unit, a core unit and an auxiliary unit; the measuring unit is arranged on the heliostat mirror surface and is used for collecting the gray value of a solar image as solar brightness; the optical axis of the measuring unit is in the same direction with the normal line of the heliostat mirror surface, and the measuring unit rotates along with the rotation of the heliostat mirror surface; the core unit converts the solar brightness obtained by the measuring unit into solar radiation quantity, and feeds the solar radiation quantity back to the mirror field control system in real time through the auxiliary unit; the auxiliary unit comprises a communication part and a power supply part, wherein the communication part exchanges data with the mirror field control system through the heliostat, and the power supply part supplies power for the measuring unit and the core unit through a heliostat power supply. The invention can measure the solar radiation quantity of each position of the whole photo-thermal mirror field in real time and provides effective data support for the operation and maintenance strategy and the risk avoidance strategy of the solar photo-thermal power generation mirror field.
Description
Technical Field
The invention belongs to the technical field of photo-thermal power generation, and particularly relates to an automatic measurement method of solar radiation quantity for heliostats.
Background
The solar photo-thermal power generation technology is to concentrate sunlight irradiated into a region to a target region, so that the target region obtains high energy flow density, and the conversion from solar energy to heat energy is realized. In the process, the solar radiation quantity is a key index of the solar photo-thermal power generation technology and represents the input energy of the whole photo-thermal power station. The accuracy of solar radiation measurement directly determines the operation and maintenance conditions of the photo-thermal power generation mirror field, and is an important influencing factor in the aspects of operation state evaluation of a photo-thermal power station, heliostat scheduling model and the like. Thus, there is a need for an accurate solar radiation measurement method.
Existing methods of solar radiation measurement rely primarily on Direct Normal Irradiance (DNI) meters to obtain solar radiation related data by locating a weather station including DNI meter equipment at a specific location in the field of view. The existing solar photo-thermal power generation mirror field has a large range, and DNI measuring instruments in weather stations can only measure the solar radiation quantity of local areas and cannot accurately represent the solar radiation quantity of the whole solar photo-thermal power generation mirror field. In cloudy weather, clouds may prevent heliostats in a partial area from being illuminated by the sun, and DNI meters in weather stations may not accurately describe this. And DNI measuring instruments are high in price and maintenance cost and cannot be arranged in a large amount in the whole solar photo-thermal power generation mirror field range.
Therefore, a high-efficiency, low-cost and convenient-to-install automatic solar radiation measuring system for heliostats is needed, not only can measure solar radiation in real time, but also can effectively cover all areas in the range of the solar photo-thermal power generation mirror field, and provides effective data support for operation and maintenance strategies and risk avoidance strategies of the solar photo-thermal power generation mirror field.
Disclosure of Invention
Aiming at the characteristics of high solar radiation quantity measuring frequency and wide coverage range in the solar photo-thermal power generation technology, the solar radiation quantity measuring system arranged on the heliostat is used for measuring the solar radiation quantity of each position in the whole photo-thermal mirror field in real time, and effective data support is provided for the operation and maintenance strategy and the risk avoidance strategy of the solar photo-thermal power generation mirror field.
An automatic measurement method of solar radiation quantity for heliostat adopts a measurement unit, a core unit and an auxiliary unit;
the measuring unit is arranged on the heliostat mirror surface and is used for collecting the gray value of a solar image as solar brightness; the optical axis of the measuring unit is in the same direction with the normal line of the heliostat mirror surface, and the measuring unit rotates along with the rotation of the heliostat mirror surface;
the core unit converts the solar brightness obtained by the measuring unit into solar radiation quantity, and feeds the solar radiation quantity back to the mirror field control system in real time through the auxiliary unit;
the auxiliary unit comprises a communication part and a power supply part, wherein the communication part exchanges data with the mirror field control system through the heliostat, and the power supply part supplies power for the measuring unit and the core unit through a heliostat power supply.
The beneficial effects of the invention are as follows:
(1) The measuring system can be arranged on the heliostat to realize detection, and has high detection efficiency.
(2) The measuring system can be arranged in different areas of the solar photo-thermal power generation mirror field, and has wide coverage range.
(3) The measuring system has the advantages of simple structure, low maintenance cost, convenient replacement and maintenance and good economical efficiency.
Drawings
FIG. 1 is a schematic diagram of a system for measuring the present invention.
Detailed Description
The invention is further described below with reference to the drawings and specific examples.
Examples
As shown in fig. 1, an automatic measurement method of solar radiation amount for heliostat includes a measurement unit 1, a core unit 2, and an auxiliary unit 3.
The measuring unit 1 is arranged on the heliostat mirror surface, and acquires the gray value of the solar image as the solar brightness. The optical axis of the measuring unit 1 is in the same direction with the normal line of the heliostat mirror surface, and the measuring unit 1 rotates along with the rotation of the heliostat mirror surface.
The measuring unit 1 is composed of an optical lens, a light intensity attenuating device and an imaging sensor.
The core unit 2 converts the solar brightness obtained by the measuring unit 1 into solar radiation quantity, and feeds back the solar radiation quantity to the mirror field control system in real time through the auxiliary unit 3.
The auxiliary unit 3 comprises a communication part and a power supply part, wherein the communication part exchanges data with the mirror field control system through the heliostat, and the power supply part supplies power to the measuring unit 1 and the core unit 2 through a heliostat power supply.
Specifically, the automatic measurement method of the solar radiation amount for the heliostat comprises the following steps:
(1) The method comprises the steps that a measuring unit, a core unit and an auxiliary unit are arranged on heliostats in different areas of a solar photo-thermal power generation mirror field, and the heliostats are in a normal working state;
(2) the solar brightness obtained by the measuring unit of the single heliostat at the moment t is
Wherein L represents solar brightness, t represents acquisition time, and hid represents heliostat number;
(3) The core unit is based on the relation function of solar brightness and solar radiation
Solar brightness +.>
Converted into solar radiation quantity->
S represents the solar radiation amount;
(4) The auxiliary unit measures the solar radiation quantity at the heliostat
Real-time feedback to field control system；
(5) The measuring units and the core units on all heliostats independently and parallelly complete automatic measurement of solar radiation quantity, and measurement results are summarized to a mirror field control system, so that the solar radiation quantity distribution of the whole solar photo-thermal power generation mirror field at the moment is obtained.
The solar radiation calibration flow in the measurement method comprises the following steps:
(1) The method comprises the steps of installing a measuring unit, a core unit and an auxiliary unit on n heliostats (n is more than or equal to 2), and installing a direct normal irradiance measuring instrument nearby the heliostats;
(2) The heliostat for calibration is in a normal working state and acquires the brightness of the sun in real time
And storing the data in the core unit, wherein i represents an ith heliostat;
(3) Synchronous acquisition of solar radiation quantity S of direct normal irradiance measuring instrument t ；
(4) Continuously collecting data (more than or equal to 8 hours) for a certain time to obtain a solar brightness sequence
And solar irradiance sequence { S } t Obtaining a relation function of solar brightness and solar radiation amount by a data fitting mode according to a time corresponding mode
(5) And storing the relation function of the solar brightness and the solar radiation quantity in a core unit to finish the calibration process.
Claims (3)
1. An automatic measurement method for solar radiation amount of heliostat is characterized in that: a measuring unit, a core unit and an auxiliary unit are adopted;
the measuring unit is arranged on the heliostat mirror surface and is used for collecting the gray value of a solar image as solar brightness; the optical axis of the measuring unit is in the same direction with the normal line of the heliostat mirror surface, and the measuring unit rotates along with the rotation of the heliostat mirror surface;
the core unit converts the solar brightness obtained by the measuring unit into solar radiation quantity, and feeds the solar radiation quantity back to the mirror field control system in real time through the auxiliary unit;
the auxiliary unit comprises a communication part and a power supply part, wherein the communication part exchanges data with the mirror field control system through the heliostat, and the power supply part supplies power for the measuring unit and the core unit through a heliostat power supply.
2. The method for automatically measuring the solar radiation amount for heliostats according to claim 1, comprising the following specific steps:
(1) The method comprises the steps that a measuring unit, a core unit and an auxiliary unit are arranged on heliostats in different areas of a solar photo-thermal power generation mirror field, and the heliostats are in a normal working state;
(2) the solar brightness obtained by the measuring unit of the single heliostat at the moment t is
Wherein L represents solar brightness, t represents acquisition time, and hid represents heliostat number;
(3) The core unit is based on the relation function of solar brightness and solar radiation
Solar brightness +.>
Converted into solar radiation quantity->
S represents the solar radiation amount;
(4) The auxiliary unit measures the solar radiation quantity at the heliostat
Real-time feedback to mirrorA field control system;
(5) The measuring units and the core units on all heliostats independently and parallelly complete automatic measurement of solar radiation quantity, and measurement results are summarized to a mirror field control system, so that the solar radiation quantity distribution of the whole solar photo-thermal power generation mirror field at the moment is obtained.
3. The automatic measurement method of solar radiation amount for heliostat according to claim 1, wherein the calibration process of the solar radiation amount is as follows:
(1) The method comprises the steps of installing a measuring unit, a core unit and an auxiliary unit on n heliostats, wherein n is more than or equal to 2, and installing a direct normal irradiance measuring instrument nearby the heliostats;
(2) The heliostat for calibration is in a normal working state and acquires the brightness of the sun in real time
And storing the data in the core unit, wherein i represents an ith heliostat;
(3) Synchronous acquisition of solar radiation quantity S of direct normal irradiance measuring instrument t ；
(4) Continuously collecting data for more than or equal to 8 hours to obtain a solar brightness sequence
And solar irradiance sequence { S } t Obtaining a relation function of solar brightness and solar radiation quantity by a data fitting mode according to a time corresponding mode +.>
(5) And storing the relation function of the solar brightness and the solar radiation quantity in a core unit to finish the calibration process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310109039.6A CN116295816A (en) | 2023-02-13 | 2023-02-13 | Automatic measurement method for solar radiation quantity of heliostat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310109039.6A CN116295816A (en) | 2023-02-13 | 2023-02-13 | Automatic measurement method for solar radiation quantity of heliostat |
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| Publication Number | Publication Date |
|---|---|
| CN116295816A true CN116295816A (en) | 2023-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310109039.6A Pending CN116295816A (en) | 2023-02-13 | 2023-02-13 | Automatic measurement method for solar radiation quantity of heliostat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116295816A (en) |
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2023
- 2023-02-13 CN CN202310109039.6A patent/CN116295816A/en active Pending
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