CN109857153B - Method for scheduling heliostats of tower-type solar power station - Google Patents
Method for scheduling heliostats of tower-type solar power station Download PDFInfo
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- CN109857153B CN109857153B CN201910090628.8A CN201910090628A CN109857153B CN 109857153 B CN109857153 B CN 109857153B CN 201910090628 A CN201910090628 A CN 201910090628A CN 109857153 B CN109857153 B CN 109857153B
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Abstract
The invention discloses a heliostat scheduling method for a tower type solar power station, which belongs to the technical field of tower type solar thermal power generation and comprises the following steps of firstly, gridding a heat absorber panel, wherein each grid on the heat absorber panel is a target point area, and the target point area is a focus point area; step two, setting an initial value, step three, calculating the current absorption power value absp of the heat absorber, step four, determining the operation condition and the scheduling type of the heliostat, step five, creating a list of the heliostat which can be called, and step six, calculating the newly increased power value or the minimum defocusing power value of the heat absorber. The method not only can simplify the calculation and logic judgment of the heliostat controller in the heliostat field, but also can reliably, effectively and quickly complete the selection and scheduling work of the heliostats in the heliostat field, and simultaneously schedules the heliostats in batches to avoid the damage of a heat absorber caused by scheduling.
Description
Technical Field
The invention relates to a method for scheduling heliostats of a tower type solar power station, and belongs to the technical field of tower type solar thermal power generation.
Background
With the limitation of fossil fuel application in recent years, the development of a conventional coal-fired power plant is greatly reduced, the clean solar thermal power generation technology is rapidly developed due to the fact that large-scale solar energy utilization can be achieved, a tower type solar thermal power generation system reflects sunlight to a heat absorber on a heat absorption tower by using a heliostat which tracks the sun in real time, and high-temperature and high-pressure steam is generated by heating a heat absorption working medium in the tower type solar thermal power generation system to drive a steam turbine generator unit to generate power, as shown in fig. 1, a heliostat field is an important component of the tower type solar thermal power generation system and is a heliostat group consisting of a plurality of day fixing mirrors and used for reflecting the sunlight to the heat absorber of the heat absorption tower. In the normal operation process of the photo-thermal power station, when the load of the heat absorber changes or the efficiency of the mirror field changes, focusing or defocusing adjustment needs to be carried out on the heliostat in the mirror field so as to meet the requirement of the thermal power of the heat absorber.
The heliostat of the whole heliostat field is generally focused towards the center of a heat absorber by the traditional heliostat scheduling method of the tower solar power station, the energy flux density distribution on the surface of the heat absorber is uneven, meanwhile, the heat accumulated easily damages the heat absorber, the service life of the heat absorber is shortened, the heat exchange efficiency is reduced, the traditional scheduling method mostly adopts a genetic algorithm, the optimal optimization solution needs to be found by variable global search, but the convergence speed is slow when the group scale of the tower type heliostat field is large, the heliostat controller of the heliostat field needs to perform complex calculation and logic judgment, and not only good calculation resources need to be occupied, but also a large amount of time is also occupied.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a heliostat scheduling method for a tower-type solar power station, which not only can simplify the calculation and logic judgment of a heliostat controller in a heliostat field, but also can reliably, effectively and quickly complete the selection and scheduling work of heliostats in the heliostat field, and simultaneously schedules the heliostats in batches to avoid the damage of a heat absorber caused by scheduling.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the heliostat scheduling method for the tower-type solar power station comprises the following steps of firstly, gridding a heat absorber panel, wherein each grid on the heat absorber panel is a target point area, and the target point area is a focus point area or a divergence focus area;
setting an initial value, setting a set value absp _ sp of absorption power of the heat absorber in a heat absorber control system, and setting a content difference value T and an external capacity difference value T0 for the set value absp _ sp of the absorption power, wherein the minimum allowable value of power of the heat absorber is absp _ sp-T, the maximum allowable value of power of the heat absorber is absp _ sp + T0, and the power value of the heat absorber which allows to be put in or defocused each time is absp _ step;
step three, calculating a current absorption power value absp of the heat absorber, calculating the current absorption power value absp of the heat absorber provided by the heliostat field heliostat by the heat absorber control system according to the inlet fused salt temperature of the heat absorber, the outlet fused salt temperature, the inlet fused salt flow of the heat absorber and the heat absorber efficiency, and simultaneously carrying out data transmission on the heat absorber control system and the heliostat field heliostat controller in a communication mode;
step four, determining the operation condition and the scheduling type of the heliostat, wherein under the focusing condition of the heliostat, the heliostat controller in the heliostat field compares the current absorption power value absp of the heat absorber with the relation that the minimum power allowable value of the heat absorber is absp _ sp-T to determine whether to perform focusing scheduling of the heliostat, and under the defocusing condition of the heliostat, the heliostat controller in the heliostat field compares the current absorption power value absp of the heat absorber with the relation that the maximum power allowable value of the heat absorber is absp _ sp + T0 to determine whether to perform defocusing scheduling of the heliostat;
step five, creating a heliostat list which can be called, and determining whether available focusing or defocusing heliostats exist, wherein the heliostat list comprises all heliostats under the non-operation working condition, and if no available focusing or defocusing heliostat exists, the heliostat list cannot be formed;
step six, calculating a newly-added power value or a minimum defocusing power value of the heat absorber, wherein the heliostat controller in the heliostat field calculates a newly-added power value absp _ focus = (absp _ sp + T0) -absp of the heat absorber or a minimum defocusing power value absp _ dfocus = absp- (absp _ sp-T) of the heat absorber during heliostat focusing scheduling according to a power set value absp _ sp of the heat absorber, a current absorbed power absp of the heat absorber, a content difference value T and an external content difference value T0 of the heat absorber, and the operation condition and the scheduling type of the heliostat determined in the step four;
step seven, distributing the calculated newly increased power value or the minimum defocusing power value of the heat absorber to different heat absorber panels, and distributing the newly increased power value absp _ focus or the minimum defocusing power value absp _ dfocus of the heat absorber to different heat absorber panels by the heliostat controller in the mirror field according to the maximum power allowable value Adm _ power of each panel of the heat absorber and the current absorbing power value absp of the heat absorber;
and step eight, the heliostat controller in the heliostat field randomly selects the heliostat from the heliostat list in the step five according to the heat absorber panel with the focusing or defocusing power distributed in the step seven, and completes the batch focusing or defocusing scheduling of the heliostat according to the focusing or defocusing scheduling flow.
The invention is further improved in that: in the fourth step, when the current absorption power value absp of the heat absorber is smaller than the minimum power allowable value absp _ sp-T of the heat absorber, the heliostat needs to be subjected to focusing scheduling, otherwise, the energy provided by the heliostat in the current heliostat field can meet the requirement, and a new heliostat does not need to be scheduled to the heat absorber; when the current absorption power value absp of the heat absorber is larger than the maximum power allowable value absp _ sp + T0 of the heat absorber, the heliostat needs to be subjected to defocusing scheduling, otherwise, the energy provided by the heliostat in the current heliostat field can meet the requirement, and a new heliostat does not need to be defocused towards the heat absorber.
The invention is further improved in that: the focusing scheduling procedure in the step eight is that,
A. determining the focusing point areas of the heliostats on the heat absorber panel, and selecting the focusing point areas of the heliostats on the heat absorber panel by the heliostat field heliostat controller according to the maximum, minimum and average metal temperatures of each focusing point area on the heat absorber panel selected in the step seven;
B. calculating a throwing power value absp _ th of the selected heliostat, wherein the initial value of the absp _ th is set to be 0;
C. selecting one heliostat from the list of callable heliostats created in the step five by the heliostat field controller, and calculating a throwing power value absp _ th = pi of the selected heliostat, wherein the pi value is a power value provided by the heliostat to the heat absorber;
D. the heliostat field heliostat controller compares the power level absp _ th of the selected heliostat calculated in the above-mentioned flow C with the power level absp _ step allowed to be put at each time of the heat absorber,
if the calculated power value absp _ th of the selected heliostat is less than the power value absp _ step allowed to be put into the heat absorber every time, the heliostat field heliostat controller continues to repeatedly execute the flow C until the power value absp _ th allowed to be put into the heat absorber every time is less than the power value absp _ step allowed to be put into the heat absorber every time;
if the power value absp _ th allowed to be put into the heat absorber at each time is not less than the power value absp _ step allowed to be put into the heat absorber at each time, the heliostat controller in the heliostat field executes a flow E;
E. calculating a current residual power value absp _ focusL = absp _ focus-absp _ th required for focusing of the heat absorber and a current residual maximum allowable focusing power value Adm _ powerL = Adm _ power-absp _ th of the heat absorber;
F. according to the current residual required focusing power value of the heat absorber calculated in the flow E, if absp _ focusL is less than =0, the heliostat controller in the heliostat field sends a focusing instruction to all selected heliostats in the flow C to focus the selected heliostats; if absp _ focusL > 0, the heliostat controller repeats the above-described procedure A;
G. the heliostat controller in the heliostat field detects whether all the heliostats receiving the instructions complete focusing or not, and if not, the process F is repeated; and if all the heliostats receiving the instructions complete focusing, returning to the step four to continuously monitor whether the heat absorber needs to carry out new heliostat focusing scheduling, namely, the heat absorber needs to schedule new heliostats.
The invention is further improved in that: the defocus scheduling procedure in the step eight is that,
a. determining the defocusing areas of the heliostats on the heat absorber panel, and selecting the defocusing areas of the heliostats on the heat absorber panel by the heliostat field heliostat controller according to the maximum, minimum and average metal temperatures of each defocusing area on the heat absorber panel selected in the step seven;
b. calculating a defocusing power value absp _ th of the selected heliostat, wherein the initial value of the absp _ th is set to be 0;
c. selecting one heliostat from the list of callable heliostats created in the step five by the heliostat field controller, and calculating a defocusing power value absp _ th = pi of the selected heliostat, wherein the pi value is the power value provided by the heliostat to the heat absorber;
d. the heliostat field heliostat controller compares the defocus power value absp _ th of the selected heliostat calculated in the above-described flow c with the power value absp _ step _ defocus at which the heat absorber is allowed to defocus each time,
if the calculated defocus power value absp _ th of the selected heliostat is less than the power value absp _ step _ defocus allowed to be defocused by the heat absorber each time, the heliostat field heliostat controller continues to repeatedly execute the flow c until the calculated defocus power value absp _ th of the selected heliostat is less than the power value absp _ step _ defocus allowed to be defocused by the heat absorber each time;
if the calculated defocusing power value absp _ th of the selected heliostat is not less than the power value absp _ step _ defocus of the defocusing allowed by the heat absorber every time, the heliostat field heliostat controller executes a flow e;
e. calculating the current residual required defocusing power value absp _ dfocusL = absp _ dfocus-absp _ th of the heat absorber by the heliostat controller in the mirror field;
f. according to the current residual defocusing power value absp _ dfocusL of the heat absorber calculated in the process e, if absp _ dfocusL is less than =0, the heliostat controller in the heliostat field sends defocusing instructions to all selected heliostats in the process c to defocus the selected heliostats; if absp _ dfocusL is more than 0, the heliostat field heliostat controller repeats the flow a;
g. the heliostat field heliostat controller detects whether all heliostats receiving the instructions complete defocusing or not, and if not, the process f is repeated; and if all the heliostats receiving the instructions complete focusing, returning to the step four to continuously monitor whether the heat absorber needs to perform new heliostat defocusing scheduling, namely the heat absorber needs to schedule new heliostats.
The invention is further improved in that: the number of cells into which each heat sink panel is divided may be 3 × 7 or 3 × 14 in the width direction × the height direction.
The invention is further improved in that: one or more thermocouples are provided on the back of the heat sink panel corresponding to each grid.
The invention is further improved in that: the heat absorber control system is a DCS control system.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
the heliostat scheduling method for the tower-type solar power station not only can simplify calculation and logic judgment of the heliostat controller in the heliostat field, but also can reliably, effectively and quickly complete the selection and scheduling work of the heliostats in the heliostat field, and simultaneously schedules the heliostats in batches to avoid heat absorber damage caused by scheduling.
Drawings
FIG. 1 is a schematic diagram of the operation of a tower field heliostat of the invention;
fig. 2 is an expanded schematic view of a heat sink panel of the present invention;
FIG. 3 is a flow chart of a heliostat scheduling method under focusing conditions of the present invention;
FIG. 4 is a flowchart of a method for scheduling heliostats in a defocused operating condition according to the present invention;
the solar heat collector comprises a heliostat 1, a heliostat 2, a heat absorber 3, a heat absorption tower 4 and a heat absorber panel.
Detailed Description
In the normal operation process of the photo-thermal power station, when the load of a heat absorber changes or the efficiency of a heliostat field changes, focusing or defocusing adjustment needs to be carried out on the heliostat in the heliostat field to meet the requirement of the thermal power of the heat absorber, the heliostat scheduling method of the tower type solar power station can ensure that the heliostat can accurately direct the reflection light spot to different target point areas of different heat absorber panels, such as the heliostat scheduling method under the focusing working condition and the scheduling method of the heliostat under the defocusing working condition, and concretely comprises the following steps,
step one, gridding the heat absorber panel, as shown in fig. 2, the number of grids divided by each heat absorber panel may be 3 × 7 or 3 × 14 in the width direction × height direction, the number of grids of the heat absorber panel is finally determined by parameters such as the size of the heat absorber, the size of the heliostat, and the scale of a mirror field, one or more thermocouples are arranged on the back of the heat absorber panel corresponding to each grid, each grid on the heat absorber panel is a target point region, and the target point region is a focus point region or a defocusing point region;
setting an initial value, setting a set value absp _ sp of absorption power of the heat absorber in a heat absorber control system, and simultaneously setting a content difference value T and an external capacity difference value T0 for the set value absp _ sp of the absorption power, wherein the minimum allowable power value of the heat absorber is absp _ sp-T, the maximum allowable power value of the heat absorber is absp _ sp + T0, the power value of the heat absorber which is allowed to be put or defocused each time is absp _ step, and the heat absorber control system is a DCS control system;
step three, calculating a current absorption power value absp of the heat absorber, calculating the current absorption power value absp of the heat absorber provided by the heliostat field heliostat by the heat absorber control system according to the inlet fused salt temperature of the heat absorber, the outlet fused salt temperature, the inlet fused salt flow of the heat absorber and the heat absorber efficiency, and simultaneously carrying out data transmission on the heat absorber control system and the heliostat field heliostat controller in a communication mode;
step four, determining the operation condition and the scheduling type of the heliostat, wherein under the focusing condition of the heliostat, the heliostat controller in the heliostat field compares the current absorption power value absp of the heat absorber with the relation that the minimum power allowable value of the heat absorber is absp _ sp-T to determine whether to perform focusing scheduling of the heliostat, and under the defocusing condition of the heliostat, the heliostat controller in the heliostat field compares the current absorption power value absp of the heat absorber with the relation that the maximum power allowable value of the heat absorber is absp _ sp + T0 to determine whether to perform defocusing scheduling of the heliostat;
step five, creating a heliostat list which can be called, and determining whether available focusing or defocusing heliostats exist, wherein the heliostat list comprises all heliostats under the non-operation working condition, and if no available focusing or defocusing heliostat exists, the heliostat list cannot be formed;
step six, calculating a newly-added power value or a minimum defocusing power value of the heat absorber, wherein the heliostat controller in the heliostat field calculates a newly-added power value absp _ focus = (absp _ sp + T0) -absp of the heat absorber or a minimum defocusing power value absp _ dfocus = absp- (absp _ sp-T) of the heat absorber during heliostat focusing scheduling according to a power set value absp _ sp of the heat absorber, a current absorbed power absp of the heat absorber, a content difference value T and an external content difference value T0 of the heat absorber, and the operation condition and the scheduling type of the heliostat determined in the step four;
step seven, distributing the calculated newly increased power value or the minimum defocusing power value of the heat absorber to different heat absorber panels, and distributing the newly increased power value absp _ focus or the minimum defocusing power value absp _ dfocus of the heat absorber to different heat absorber panels by the heliostat controller in the mirror field according to the maximum power allowable value Adm _ power of each panel of the heat absorber and the current absorbing power value absp of the heat absorber;
and step eight, the heliostat controller in the heliostat field randomly selects the heliostat from the heliostat list in the step five according to the heat absorber panel with the focusing or defocusing power distributed in the step seven, and completes the batch focusing or defocusing scheduling of the heliostat according to the focusing or defocusing scheduling flow.
In the fourth step, when the current absorption power value absp of the heat absorber is smaller than the minimum power allowable value absp _ sp-T of the heat absorber, the heliostat needs to be subjected to focusing scheduling, otherwise, the energy provided by the heliostat in the current heliostat field can meet the requirement, and a new heliostat does not need to be scheduled to the heat absorber; and the focusing scheduling procedure in the step eight is,
A. determining the focusing point areas of the heliostats on the heat absorber panel, and selecting the focusing point areas of the heliostats on the heat absorber panel by the heliostat field heliostat controller according to the maximum, minimum and average metal temperatures of each focusing point area on the heat absorber panel selected in the step seven;
B. calculating a throwing power value absp _ th of the selected heliostat, wherein the initial value of the absp _ th is set to be 0;
C. selecting one heliostat from the list of callable heliostats created in the step five by the heliostat field controller, and calculating a throwing power value absp _ th = pi of the selected heliostat, wherein the pi value is a power value provided by the heliostat to the heat absorber;
D. the heliostat field heliostat controller compares the power level absp _ th of the selected heliostat calculated in the above-mentioned flow C with the power level absp _ step allowed to be put at each time of the heat absorber,
if the calculated power value absp _ th of the selected heliostat is less than the power value absp _ step allowed to be put into the heat absorber every time, the heliostat field heliostat controller continues to repeatedly execute the flow C until the power value absp _ th allowed to be put into the heat absorber every time is less than the power value absp _ step allowed to be put into the heat absorber every time;
if the power value absp _ th allowed to be put into the heat absorber at each time is not less than the power value absp _ step allowed to be put into the heat absorber at each time, the heliostat controller in the heliostat field executes a flow E;
E. calculating a current residual power value absp _ focusL = absp _ focus-absp _ th required for focusing of the heat absorber and a current residual maximum allowable focusing power value Adm _ powerL = Adm _ power-absp _ th of the heat absorber;
F. according to the current residual required focusing power value of the heat absorber calculated in the flow E, if absp _ focusL is less than =0, the heliostat controller in the heliostat field sends a focusing instruction to all selected heliostats in the flow C to focus the selected heliostats; if absp _ focusL > 0, the heliostat controller repeats the above-described procedure A;
G. the heliostat controller in the heliostat field detects whether all the heliostats receiving the instructions complete focusing or not, and if not, the process F is repeated; and if all the heliostats receiving the instructions complete focusing, returning to the step four to continuously monitor whether the heat absorber needs to carry out new heliostat focusing scheduling, namely, the heat absorber needs to schedule new heliostats.
In the fourth step, when the current absorption power value absp of the heat absorber is greater than the maximum power allowable value absp _ sp + T0 of the heat absorber, the heliostat needs to perform defocusing scheduling, otherwise, the energy provided by the heliostat in the current heliostat field can meet the requirement, a new heliostat does not need to be defocused to the heat absorber, the defocusing scheduling process in the eighth step is,
a. determining the defocusing areas of the heliostats on the heat absorber panel, and selecting the defocusing areas of the heliostats on the heat absorber panel by the heliostat field heliostat controller according to the maximum, minimum and average metal temperatures of each defocusing area on the heat absorber panel selected in the step seven;
b. calculating a defocusing power value absp _ th of the selected heliostat, wherein the initial value of the absp _ th is set to be 0;
c. selecting one heliostat from the list of callable heliostats created in the step five by the heliostat field controller, and calculating a defocusing power value absp _ th = pi of the selected heliostat, wherein the pi value is the power value provided by the heliostat to the heat absorber;
d. the heliostat field heliostat controller compares the defocus power value absp _ th of the selected heliostat calculated in the above-described flow c with the power value absp _ step _ defocus at which the heat absorber is allowed to defocus each time,
if the calculated defocus power value absp _ th of the selected heliostat is less than the power value absp _ step _ defocus allowed to be defocused by the heat absorber each time, the heliostat field heliostat controller continues to repeatedly execute the flow c until the calculated defocus power value absp _ th of the selected heliostat is less than the power value absp _ step _ defocus allowed to be defocused by the heat absorber each time;
if the calculated defocusing power value absp _ th of the selected heliostat is not less than the power value absp _ step _ defocus of the defocusing allowed by the heat absorber every time, the heliostat field heliostat controller executes a flow e;
e. calculating the current residual required defocusing power value absp _ dfocusL = absp _ dfocus-absp _ th of the heat absorber by the heliostat controller in the mirror field;
f. according to the current residual defocusing power value absp _ dfocusL of the heat absorber calculated in the process e, if absp _ dfocusL is less than =0, the heliostat controller in the heliostat field sends defocusing instructions to all selected heliostats in the process c to defocus the selected heliostats; if absp _ dfocusL is more than 0, the heliostat field heliostat controller repeats the flow a;
g. the heliostat field heliostat controller detects whether all heliostats receiving the instructions complete defocusing or not, and if not, the process f is repeated; and if all the heliostats receiving the instructions complete focusing, returning to the step four to continuously monitor whether the heat absorber needs to perform new heliostat defocusing scheduling, namely the heat absorber needs to schedule new heliostats.
Claims (6)
1. The heliostat scheduling method of the tower-type solar power station is characterized in that: comprises the following steps of (a) carrying out,
step one, gridding a heat absorber panel, wherein each grid on the heat absorber panel is a target point area, and the target point area is a focus point area or a divergence focus point area;
setting an initial value, setting a set value absp _ sp of absorption power of the heat absorber in a heat absorber control system, and setting a content difference value T and an external capacity difference value T0 for the set value absp _ sp of the absorption power, wherein the minimum allowable value of power of the heat absorber is absp _ sp-T, the maximum allowable value of power of the heat absorber is absp _ sp + T0, and the power value of the heat absorber which allows to be put in or defocused each time is absp _ step;
step three, calculating a current absorption power value absp of the heat absorber, calculating the current absorption power value absp of the heat absorber provided by the heliostat field heliostat by the heat absorber control system according to the inlet fused salt temperature of the heat absorber, the outlet fused salt temperature, the inlet fused salt flow of the heat absorber and the heat absorber efficiency, and simultaneously carrying out data transmission on the heat absorber control system and the heliostat field heliostat controller in a communication mode;
step four, determining the operation condition and the scheduling type of the heliostat, wherein under the focusing condition of the heliostat, the heliostat controller in the heliostat field compares the current absorption power value absp of the heat absorber with the relation that the minimum power allowable value of the heat absorber is absp _ sp-T to determine whether to perform focusing scheduling of the heliostat, and under the defocusing condition of the heliostat, the heliostat controller in the heliostat field compares the current absorption power value absp of the heat absorber with the relation that the maximum power allowable value of the heat absorber is absp _ sp + T0 to determine whether to perform defocusing scheduling of the heliostat;
step five, creating a heliostat list which can be called, and determining whether available focusing or defocusing heliostats exist, wherein the heliostat list comprises all heliostats under the non-operation working condition, and if no available focusing or defocusing heliostat exists, the heliostat list cannot be formed;
step six, calculating a newly-added power value or a minimum defocusing power value of the heat absorber, wherein the heliostat controller in the heliostat field calculates a newly-added power value absp _ focus = (absp _ sp + T0) -absp of the heat absorber or a minimum defocusing power value absp _ dfocus = absp- (absp _ sp-T) of the heat absorber during heliostat focusing scheduling according to a power set value absp _ sp of the heat absorber, a current absorbed power value absp of the heat absorber, a content difference value T and an external content difference value T0 of the heat absorber, and the operation condition and the scheduling type of the heliostat determined in the step four;
step seven, distributing the calculated newly increased power value or the minimum defocusing power value of the heat absorber to different heat absorber panels, and distributing the newly increased power value absp _ focus or the minimum defocusing power value absp _ dfocus of the heat absorber to different heat absorber panels by the heliostat controller in the mirror field according to the maximum power allowable value Adm _ power of each panel of the heat absorber and the current absorbing power value absp of the heat absorber;
step eight, the heliostat controller in the heliostat field randomly selects a heliostat from the heliostat list in the step five according to the heat absorber panel with the focusing or defocusing power distributed in the step seven, and completes the batch focusing or defocusing scheduling of the heliostat according to a focusing or defocusing scheduling flow;
the defocus scheduling procedure is as follows,
a. determining the defocusing areas of the heliostats on the heat absorber panel, and selecting the defocusing areas of the heliostats on the heat absorber panel by the heliostat field heliostat controller according to the maximum, minimum and average metal temperatures of each defocusing area on the heat absorber panel selected in the step seven;
b. calculating a defocusing power value absp _ th of the selected heliostat, wherein the initial value of the absp _ th is set to be 0;
c. selecting one heliostat from the list of callable heliostats created in the step five by the heliostat field controller, and calculating a defocusing power value absp _ th = pi of the selected heliostat, wherein the pi value is the power value provided by the heliostat to the heat absorber;
d. the heliostat field heliostat controller compares the defocus power value absp _ th of the selected heliostat calculated in the above-described flow c with the power value absp _ step _ defocus at which the heat absorber is allowed to defocus each time,
if the calculated defocus power value absp _ th of the selected heliostat is less than the power value absp _ step _ defocus allowed to be defocused by the heat absorber each time, the heliostat field heliostat controller continues to repeatedly execute the flow c until the calculated defocus power value absp _ th of the selected heliostat is less than the power value absp _ step _ defocus allowed to be defocused by the heat absorber each time;
if the calculated defocusing power value absp _ th of the selected heliostat is not less than the power value absp _ step _ defocus of the defocusing allowed by the heat absorber every time, the heliostat field heliostat controller executes a flow e;
e. calculating the current residual required defocusing power value absp _ dfocusL = absp _ dfocus-absp _ th of the heat absorber by the heliostat controller in the mirror field;
f. according to the current residual defocusing power value absp _ dfocusL of the heat absorber calculated in the process e, if absp _ dfocusL is less than =0, the heliostat controller in the heliostat field sends defocusing instructions to all selected heliostats in the process c to defocus the selected heliostats; if absp _ dfocusL is more than 0, the heliostat field heliostat controller repeats the flow a;
g. the heliostat field heliostat controller detects whether all heliostats receiving the instructions complete defocusing or not, and if not, the process f is repeated; and if all the heliostats receiving the instructions complete focusing, returning to the step four to continuously monitor whether the heat absorber needs to perform new heliostat defocusing scheduling, namely the heat absorber needs to schedule new heliostats.
2. The method of claim 1 for scheduling heliostats in a tower solar power plant, comprising: in the fourth step, when the current absorption power value absp of the heat absorber is smaller than the minimum power allowable value absp _ sp-T of the heat absorber, the heliostat needs to be subjected to focusing scheduling, otherwise, the energy provided by the heliostat in the current heliostat field can meet the requirement, and a new heliostat does not need to be scheduled to the heat absorber; when the absorption power value absp of the current heat absorber is larger than the maximum power allowable value absp _ sp + T0 of the heat absorber, the heliostat needs to be subjected to defocusing scheduling, otherwise, the energy provided by the heliostat in the current heliostat field can meet the requirement, and a new heliostat does not need to be defocused towards the heat absorber.
3. The method of claim 2, wherein: the focusing scheduling procedure in the step eight is that,
A. determining the focusing point areas of the heliostats on the heat absorber panel, and selecting the focusing point areas of the heliostats on the heat absorber panel by the heliostat field heliostat controller according to the maximum, minimum and average metal temperatures of each focusing point area on the heat absorber panel selected in the step seven;
B. calculating a throwing power value absp _ th of the selected heliostat, wherein the initial value of the absp _ th is set to be 0;
C. selecting one heliostat from the list of callable heliostats created in the step five by the heliostat field controller, and calculating a throwing power value absp _ th = pi of the selected heliostat, wherein the pi value is a power value provided by the heliostat to the heat absorber;
D. the heliostat field heliostat controller compares the power level absp _ th of the selected heliostat calculated in the above-mentioned flow C with the power level absp _ step allowed to be put at each time of the heat absorber,
if the calculated put power value absp _ th of the selected heliostat is less than the power value absp _ step allowed to put the heat absorber in each time, the heliostat field heliostat controller continues to repeatedly execute the flow C until the put power value absp _ th of the selected heliostat is less than the power value absp _ step allowed to put the heat absorber in each time;
if the power value absp _ th of the selected heliostat is not less than the power value absp _ step allowed to be put by the heat absorber each time, the heliostat controller executes a flow E;
E. calculating a current residual power value absp _ focusL = absp _ focus-absp _ th required for focusing of the heat absorber and a current residual maximum allowable focusing power value Adm _ powerL = Adm _ power-absp _ th of the heat absorber;
F. according to the current residual required focusing power value of the heat absorber calculated in the flow E, if absp _ focusL is less than =0, the heliostat controller in the heliostat field sends a focusing instruction to all selected heliostats in the flow C to focus the selected heliostats; if absp _ focusL > 0, the heliostat controller repeats the above-described procedure A;
G. the heliostat controller in the heliostat field detects whether all the heliostats receiving the instructions complete focusing or not, and if not, the process F is repeated; and if all the heliostats receiving the instructions complete focusing, returning to the step four to continuously monitor whether the heat absorber needs to carry out new heliostat focusing scheduling, namely, the heat absorber needs to schedule new heliostats.
4. The method of claim 1 for scheduling heliostats in a tower solar power plant, comprising: the number of cells into which each heat sink panel is divided may be 3 × 7 or 3 × 14 in the width direction × the height direction.
5. The method of claim 1 for scheduling heliostats in a tower solar power plant, comprising: one or more thermocouples are provided on the back of the heat sink panel corresponding to each grid.
6. The method of claim 1 for scheduling heliostats in a tower solar power plant, comprising: the heat absorber control system is a DCS control system.
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| CN111290442B (en) * | 2020-03-12 | 2023-03-21 | 东方电气集团东方锅炉股份有限公司 | Method for scheduling safety channel of tower-type heliostat |
| CN113128056B (en) * | 2021-04-22 | 2022-12-13 | 中国电力工程顾问集团西北电力设计院有限公司 | Distributed computing device and method for measuring and calculating power of photo-thermal power generation mirror field |
| CN113432314B (en) * | 2021-05-27 | 2022-07-01 | 山东电力建设第三工程有限公司 | Real-time power balance method for fused salt heat absorber of tower type photo-thermal power station |
| CN116341285B (en) * | 2023-05-23 | 2023-08-22 | 中电建新能源集团股份有限公司 | Tower type photo-thermal power generation heliostat dispatching optimization method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202261650U (en) * | 2011-11-01 | 2012-05-30 | 南京科远自动化集团股份有限公司 | Monitoring system for heliostat field of tower-type solar power plant |
| CN104034058A (en) * | 2014-05-27 | 2014-09-10 | 浙江大学 | Imaging method of tower-type solar thermoelectric system mirror field based on GPU |
| CN104635775A (en) * | 2015-01-16 | 2015-05-20 | 浙江大学 | Method for controlling internal pressure of water/vapor receiver by optimal scheduling of mirror field |
| CN105160435A (en) * | 2015-09-17 | 2015-12-16 | 浙江大学 | Tower-type solar thermal power plant heliostat field focusing strategy optimization method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101918769B (en) * | 2007-10-24 | 2013-01-16 | 伊苏勒有限公司 | Calibration and tracking control of heliostats in a central tower receiver solar power plant |
-
2019
- 2019-01-30 CN CN201910090628.8A patent/CN109857153B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202261650U (en) * | 2011-11-01 | 2012-05-30 | 南京科远自动化集团股份有限公司 | Monitoring system for heliostat field of tower-type solar power plant |
| CN104034058A (en) * | 2014-05-27 | 2014-09-10 | 浙江大学 | Imaging method of tower-type solar thermoelectric system mirror field based on GPU |
| CN104635775A (en) * | 2015-01-16 | 2015-05-20 | 浙江大学 | Method for controlling internal pressure of water/vapor receiver by optimal scheduling of mirror field |
| CN105160435A (en) * | 2015-09-17 | 2015-12-16 | 浙江大学 | Tower-type solar thermal power plant heliostat field focusing strategy optimization method |
Non-Patent Citations (1)
| Title |
|---|
| 塔式太阳能热电***镜场调度的优化;赵茜;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;20170815(第08期);全文 * |
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