阅读说明：本技术 用于塔式光热发电的定日镜与光伏板相结合的定日镜系统 (Heliostat system for combining heliostat and photovoltaic panel of tower type photo-thermal power generation ) 是由 刘清源 章涵 纪培栋 李心 罗小强 于 2019-09-24 设计创作，主要内容包括：本发明提供了一种用于塔式光热发电的定日镜与光伏板相结合的定日镜系统,包括：设置有若干排定日镜的定日镜场、用于控制定日镜的方位角和水平角的定日镜控制子系统、用于为所述定日镜控制子系统供电的光伏发电子系统；所述定日镜包括定日镜镜面主体、定日镜支柱；所述光伏发电子系统,包括光伏板、蓄电池组、充放电控制器；所述光伏板设置于所述定日镜镜面主体的背面；前排的定日镜镜面主体背面的光伏板用于接收被该述前排定日镜镜面主体背面遮挡的后排定日镜镜面主体正面反射的太阳光。本发明可以有效的减少定日镜场的遮挡效率损失,提升光热电站发电效率,有效的降低发电成本。(The invention provides a heliostat system for combining a heliostat and a photovoltaic panel of a tower type photo-thermal power generation, which comprises: the system comprises a heliostat field provided with a plurality of rows of heliostats, a heliostat control subsystem used for controlling azimuth angles and horizontal angles of the heliostats, and a photovoltaic power generation subsystem used for supplying power to the heliostat control subsystem; the heliostat comprises a heliostat mirror body and a heliostat strut; the photovoltaic power generation subsystem comprises a photovoltaic panel, a storage battery pack and a charge-discharge controller; the photovoltaic panel is arranged on the back of the heliostat mirror body; the photovoltaic panel on the back of the front row of heliostat mirror surface main bodies is used for receiving the sunlight reflected by the front of the rear row of heliostat mirror surface main bodies shielded by the back of the front row of heliostat mirror surface main bodies. The invention can effectively reduce the shielding efficiency loss of the heliostat field, improve the generating efficiency of the photo-thermal power station and effectively reduce the generating cost.)

1. A heliostat system in combination with a photovoltaic panel for tower photo-thermal power generation comprising: the system comprises a heliostat field provided with a plurality of rows of heliostats and a heliostat control subsystem used for controlling azimuth angles and horizontal angles of the heliostats, wherein the heliostat field control system controls the heliostats to reflect sunlight to a heat absorber of the heat absorption tower according to the incident angle of the sun; it is characterized by also comprising: a photovoltaic power generation subsystem for powering the heliostat control subsystem;

the heliostat comprises a heliostat mirror body and a heliostat strut;

the photovoltaic power generation subsystem comprises a photovoltaic panel, a storage battery pack and a charge-discharge controller;

the photovoltaic panel is arranged on the back of the heliostat mirror body;

the photovoltaic panel on the back of the front row of heliostat mirror surface main bodies is used for receiving sunlight reflected by the front of the rear row of heliostat mirror surface main bodies and shielded by the back of the front row of heliostat mirror surface main bodies;

the storage battery pack is connected with the photovoltaic panel; the charge and discharge controller is connected with the storage battery pack;

and the storage battery pack is connected with the heliostat control subsystem.

2. The system of claim 1, wherein the heliostat further comprises a heliostat elevation angle hydraulic electric push rod, a heliostat azimuth angle drive motor; the heliostat elevation angle hydraulic electric push rod is arranged on the heliostat mirror surface main body, and the heliostat azimuth angle driving motor is arranged at the joint of the heliostat mirror surface main body and a heliostat strut;

the heliostat control subsystem is connected with a speed reducer through the heliostat azimuth driving motor to adjust the azimuth of the heliostat;

and the heliostat control subsystem adjusts the horizontal angle of the heliostat through the heliostat elevation angle hydraulic electric push rod.

3. The system of claim 1, wherein said heliostat support is fixed to the ground by bolts or deep-buried means.

4. The system of claim 1, wherein the heliostat control subsystem comprises a heliostat control device, a heliostat communication device; both disposed on the heliostat support;

the heliostat communication device is used for receiving a moving instruction sent by the upper computer; and sending the command to the heliostat control device;

and the heliostat control device receives the instruction of the heliostat communication device and controls the azimuth angle and the horizontal angle of the heliostat according to the instruction.

5. The system of claim 1, wherein the heliostat mirror body comprises a heliostat frame, a heliostat reflective glass; the shape of the reflecting glass is rectangular or square.

6. The system of claim 5, wherein two photovoltaic panels are provided at two right angle positions above the back of the heliostat reflective glass.

7. The system of claim 1, wherein the area of the photovoltaic panel is determined by the formula: the photovoltaic panel area (0.0035 (absorber tower height/heliostat width) ^2-0.095) front row heliostat to back row heliostat spacing/heliostat width + (0.004078 (absorber tower height/heliostat width) + 0.053).

8. The system of claim 1, wherein the charge and discharge controller has a high voltage disconnect and restore function, an under voltage alarm and restore function, a low voltage disconnect and restore function, and a temperature compensation function.

9. The system of claim 1, wherein the capacity of the battery pack is determined by the formula:

battery capacity + load power consumption +0.2 battery factor +0.1 battery self-discharge.

10. The system of claim 1, wherein the battery pack has a number of series-parallel components determined by the formula:

the number of the parallel-connected components of the storage battery is equal to daily average load/daily output of the components,

the number of the series-connected components of the storage battery is equal to the system voltage/component voltage.

11. The system of claim 1, wherein the capacity type of the battery pack is a lithium battery or a lead acid battery.

Technical Field

The invention relates to the technical field of solar power generation, in particular to a heliostat system for combining a heliostat and a photovoltaic panel for tower-type photo-thermal power generation.

Background

Electric energy is an important guarantee for social development and economic construction, and is closely combined with high technology to create colorful human life, and meanwhile, the wide application of electric energy also causes the phenomenon of insufficient power supply in the global scope to frequently appear. In the world, thermal power generation is the most important form of power generation at present, but due to the massive combustion of fossil fuels such as petroleum, natural gas and coal, the problem of energy exhaustion is caused, and the problem of environmental pollution, especially air pollution, is increasingly serious. From the beginning of 2013, PM2.5 is continuously concerned by people, and severe haze weather affects most cities in China. In order to relieve the contradiction between economic growth, energy shortage and environmental pollution, relevant departments of the government of China have developed a plurality of policies, such as improving the energy utilization rate, moving the high-pollution industry, perfecting the joint control mechanism of atmospheric pollution among various regions and the like. However, from the implementation effect, the measures are both temporary solution and permanent solution, and only by changing the current energy use mode, the solar energy, wind energy and other clean energy are vigorously developed and popularized, and the energy structure mainly using fossil energy is thoroughly changed, the problems of energy shortage and environmental pollution can be fundamentally alleviated, so that the phenomena of insufficient power supply, atmospheric haze and the like are eliminated.

Solar energy is a high-quality green energy, and has high-quality light energy storage in some domestic areas, so that the average annual illumination quantity is considerable, and the solar energy solar generator has a value of developing solar power generation greatly. The photo-thermal power generation is a high-quality green power generation mode, has no pollution, can drive local economic development and provides a large number of working posts.

The heliostat field is the core of photo-thermal power generation, and sunlight can be concentrated on the heat collecting tower by controlling the heliostat field to chase the sun so as to generate power through photo-thermal power. In order to utilize the illumination energy on the limited land as much as possible, the heliostats need to be densely arranged. The dense arrangement inevitably causes mutual shielding among the heliostats, the shielded area of one heliostat is possibly small, but the shielding amount sum of tens of thousands of heliostats is very large. In terms of feedback data of a heliostat field on a photo-thermal power station site, as the sun rises and falls, a high shielding rate area changes, and the whole heliostat field needs to be optimized for the shielding problem. The problem to be solved urgently is to reasonably utilize the solar energy source in the shielding area.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a heliostat system for combining a heliostat and a photovoltaic panel in tower-type photo-thermal power generation, which not only can effectively utilize the shielded solar energy, but also can provide electric energy for the heliostat to track the sun, reduce the plant power consumption rate, improve the power generation efficiency and reduce the power generation cost. The technical scheme of the invention is as follows:

a heliostat system in combination with a photovoltaic panel for tower photo-thermal power generation comprising: the system comprises a heliostat field provided with a plurality of rows of heliostats and a heliostat control subsystem used for controlling azimuth angles and horizontal angles of the heliostats, wherein the heliostat field control system controls the heliostats to reflect sunlight to a heat absorber of the heat absorption tower according to the incident angle of the sun; it is characterized by also comprising: a photovoltaic power generation subsystem for powering the heliostat control subsystem;

the heliostat comprises a heliostat mirror body and a heliostat strut;

the photovoltaic power generation subsystem comprises a photovoltaic panel, a storage battery pack and a charge-discharge controller;

the photovoltaic panel is arranged on the back of the heliostat mirror body;

the photovoltaic panel on the back of the front row of heliostat mirror surface main bodies is used for receiving sunlight reflected by the front of the rear row of heliostat mirror surface main bodies and shielded by the back of the front row of heliostat mirror surface main bodies;

the storage battery pack is connected with the photovoltaic panel; the charge and discharge controller is connected with the storage battery pack;

and the storage battery pack is connected with the heliostat control subsystem.

Optionally, the heliostat further comprises a heliostat elevation angle hydraulic electric push rod and a heliostat azimuth angle driving motor; the heliostat elevation angle hydraulic electric push rod is arranged on the heliostat mirror surface main body, and the heliostat azimuth angle driving motor is arranged at the joint of the heliostat mirror surface main body and a heliostat strut;

optionally, the heliostat control subsystem adjusts the azimuth angle of the heliostat by connecting the heliostat azimuth angle driving motor with a speed reducer;

and the heliostat control subsystem adjusts the horizontal angle of the heliostat through the heliostat elevation angle hydraulic electric push rod.

Optionally, the heliostat pillar is fixed to the ground by bolts or by deep burying.

Optionally, the heliostat control subsystem comprises a heliostat control device and a heliostat communication device; both disposed on the heliostat support;

the heliostat communication device is used for receiving a moving instruction sent by the upper computer; and sending the command to the heliostat control device;

and the heliostat control device receives the instruction of the heliostat communication device and controls the azimuth angle and the horizontal angle of the heliostat according to the instruction.

Optionally, the heliostat mirror body comprises a heliostat frame and heliostat reflecting glass; the shape of the reflecting glass is rectangular or square.

Optionally, two photovoltaic panels are provided at two right angle positions above the back of the heliostat reflective glass.

Optionally, the area of the photovoltaic panel is determined by the following formula: photovoltaic panel area ═ 0.0035 (absorber height/heliostat width) ^2-0.095) ^ front row heliostat to rear row heliostat spacing/heliostat width + (0.004078 (absorber height/heliostat width) +0.053)

Optionally, the charge and discharge controller has a high voltage disconnection and recovery function, an under voltage alarm and recovery function, a low voltage disconnection and recovery function, and a temperature compensation function.

Optionally, the capacity of the battery pack is determined by the following formula:

battery capacity + load power consumption +0.2 battery factor +0.1 battery self-discharge.

Optionally, the number of series-parallel components of the battery pack is determined by the following formula:

the number of the parallel-connected components of the storage battery is equal to daily average load/daily output of the components,

the number of the series-connected components of the storage battery is equal to the system voltage/component voltage.

Optionally, the capacity type of the battery pack is a lithium battery or a lead-acid battery.

Compared with the prior art, the invention has the following beneficial effects:

a system combining a heliostat and a photovoltaic panel is designed aiming at the sunlight reflection shielding problem of a photo-thermal power generation mirror field, so that the light energy shielding part loss can be effectively utilized, the power is supplied for the operation of the heliostat, the plant power consumption rate can be reduced, and the power generation cost is reduced.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic diagram of a heliostat system in combination with a photovoltaic panel for a tower-type solar-thermal power generation system in accordance with an embodiment of the invention;

fig. 2 is a schematic structural diagram of a heliostat system in which heliostats for tower-type photothermal power generation are combined with a photovoltaic panel according to an embodiment of the invention.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

Referring to fig. 1 and 2, a heliostat system for tower photothermal power generation in combination with a photovoltaic panel, comprising: the system comprises a heliostat field provided with a plurality of rows of heliostats, a heliostat control subsystem used for controlling azimuth angles and horizontal angles of the heliostats, and a photovoltaic power generation subsystem used for supplying power to the heliostat control subsystem; wherein:

the heliostat field control system controls the heliostat to reflect sunlight to a heat absorber of the heat absorption tower according to the incident angle of the sun;

the heliostat comprises a heliostat mirror body 1, a heliostat strut 2, a heliostat elevation angle hydraulic electric push rod 7 and a heliostat azimuth angle driving motor 8;

the heliostat elevation angle hydraulic electric push rod 7 is arranged on the heliostat mirror surface main body, and the heliostat azimuth angle driving motor is arranged at the joint of the heliostat mirror surface main body and a heliostat strut;

the heliostat control subsystem is connected with a speed reducer through the heliostat azimuth driving motor 8 to adjust the azimuth of the heliostat;

and the heliostat control subsystem adjusts the horizontal angle of the heliostat through the heliostat elevation angle hydraulic electric push rod 7.

The heliostat support column 2 is fixed on the ground by bolts or a deep burying mode.

The photovoltaic power generation subsystem comprises a photovoltaic panel, a storage battery pack 10 and a charge and discharge controller 4;

the photovoltaic panel is arranged on the back of the heliostat mirror body;

the photovoltaic panel on the back of the front row of heliostat mirror surface main bodies is used for receiving sunlight reflected by the front of the rear row of heliostat mirror surface main bodies and shielded by the back of the front row of heliostat mirror surface main bodies;

the storage battery pack is connected with the photovoltaic panel; the charge and discharge controller is connected with the storage battery pack;

and the storage battery pack is connected with the heliostat control subsystem.

Wherein the area of the photovoltaic panel is determined by the formula: the photovoltaic panel area (0.0035 (absorber tower height/heliostat width) ^2-0.095) front row heliostat to back row heliostat spacing/heliostat width + (0.004078 (absorber tower height/heliostat width) + 0.053).

The charge and discharge controller 4 has a high-voltage disconnection and recovery function, an under-voltage alarm and recovery function, a low-voltage disconnection and recovery function and a temperature compensation function, can protect the use safety of the storage battery, and prolongs the service life of the storage battery.

Wherein the capacity of the battery pack is determined by the following formula:

battery capacity + load power consumption +0.2 battery factor +0.1 battery self-discharge.

The storage battery pack is characterized in that the number of series-parallel components of the storage battery pack is determined by the following formula:

the number of the parallel-connected components of the storage battery is equal to daily average load/daily output of the components,

the number of the series-connected components of the storage battery is equal to the system voltage/component voltage.

The capacity type of the storage battery pack is a lithium battery or a lead-acid battery.

The heliostat control subsystem comprises a heliostat control device 9 and a heliostat communication device 8; both disposed on the heliostat support column 2;

the heliostat communication device 8 is used for receiving a moving instruction sent by an upper computer; and sends the instruction to the heliostat control device 9;

the heliostat control device 9 receives the instruction of the heliostat communication device 8 and controls the azimuth angle and the horizontal angle of the heliostat according to the instruction.

In this embodiment, the heliostat mirror main body includes a heliostat frame and heliostat reflecting glass; the shape of the reflecting glass is rectangular or square. Two photovoltaic panels 5, 6 are arranged at two right-angle positions above the back of the heliostat reflecting glass. Here, the number and specific positions of the photovoltaic panels are not limited by the present invention, as long as the purpose of absorbing the blocked solar reflected light can be achieved.

When the heliostat control subsystem controls the heliostats to track the sun, partial sunlight of the rear-row heliostats is reflected to the photovoltaic panel arranged on the back of the front-row heliostats, the photovoltaic panel generates electricity when receiving solar radiation, the generated electricity is connected with the heliostat control subsystem to provide electricity for the heliostat control subsystem, redundant electricity is stored by the storage battery pack under the control of the charge and discharge controller, and the storage battery pack discharges electricity to provide electricity for the heliostats when the electricity supply is insufficient.

The heliostat mirror body 1 is arranged on the heliostat pillar 2, two photovoltaic panels 5 and 6 are arranged on the back surfaces of two angles above the heliostat mirror body 1, namely the back surface of the heliostat mirror body, and when mutual shielding between the heliostats occurs, the two photovoltaic panels can receive shielded solar reflection light. The two photovoltaic panels are connected to a storage battery pack 10, electric energy is stored in the storage battery pack, the storage battery pack is composed of lithium batteries or lead-acid batteries, a charging and discharging controller 4 is arranged beside the storage battery pack, and the state of the storage battery pack can be controlled through the charging and discharging controller 4.

The storage battery pack 10 supplies power to the heliostat control device 9 and the heliostat communication device 3 through electric wires, the heliostat control device 9 is installed on the side face of the heliostat pillar 2, the heliostat communication device 3 is installed on the base portion of the heliostat pillar 2, and the heliostat communication device 3 is connected with an upper computer through a cable and can receive a moving instruction sent by the upper computer. A signal may then be sent to the heliostat control 9.

After receiving the moving instruction sent by the heliostat communication device 3, the heliostat control device 9 converts the control signal into a pulse signal and sends the pulse signal to the heliostat elevation angle hydraulic electric push rod 7 and the heliostat azimuth angle driving motor 8, so that the heliostat can be controlled to rotate to a proper angle for light condensation and heat collection.

The area with the high heliostat field shielding incidence can change along with the movement of the position of the sun, and for the area with the low shielding incidence, the photovoltaic power generation device can not receive enough sunlight, and the needed electric energy is provided for the heliostat by the service power at the moment. And to sheltering from the high region of incidence, just can provide the required electric energy of heliostat by photovoltaic power generation, simultaneously, can be to storage battery storage electric energy that charges, after having enough energy storage in the battery, can cut off the outside power supply, can be self-sufficient, guarantee that the heliostat chases after the day function realizes, reduce the station service rate of power consumption, reduce the power generation cost.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.