CN102096417B

CN102096417B - Windward leveling device for solar oblique single-shaft tracker

Info

Publication number: CN102096417B
Application number: CN 201010613792
Authority: CN
Inventors: 徐永邦; 王峰; 王庆; 邹新; 邓霞; 王芳
Original assignee: GCL SOLAR SYSTEM Ltd
Current assignee: Nanjing CNI23 Energy Engineering Co., Ltd.
Priority date: 2010-12-30
Filing date: 2010-12-30
Publication date: 2013-06-19
Anticipated expiration: 2030-12-30
Also published as: CN102096417A

Abstract

The invention discloses a windward leveling device for a solar oblique single-shaft tracker. The device comprises a reducing motor, a rotating shaft, a first coder, a bracket, a wind vane, a second coder, a wind speed sensor, a read-write module and a controller, wherein the rotating shaft is fixed on the bracket; one end of the rotating shaft is connected with the reducing motor, and rotates under the driving action of the reducing motor by taking the rotating shaft as a shaft; an inner shaft of the first coder is fixedly connected with the rotating shaft, and an outer shaft of the first coder is connected with the bracket; a main rod of the wind vane is fixedly connected with the other end of the rotating shaft; the rotating shaft is connected with the inner shaft of the second coder; an outer shaft of the second coder is connected with the bracket; the read-write module is used for transmitting the position values of the first coder and the second coder and a wind speed signal of the wind speed sensor to the controller, and drives the reducing motor to run under the control of the controller. By the device, the tracker can be controlled to be automatically leveled when a wind speed is greater than a set value, and a solar azimuth angle can be normally tracked when the wind speed is smaller than a designed wind speed value, so that safety of the tracker is ensured.

Description

Solar inclined single-shaft tracker down wind laying-down device

Technical field

The present invention relates to a kind of follow-up control apparatus for the solar energy power generating field, specifically, the present invention relates to a kind of solar inclined single-shaft tracker down wind laying-down device.

Background technology

Solar energy power generating is one of principal mode that utilizes sun power, and the sun is followed the tracks of, and guarantees that the sunshine vertical irradiation on solar panel, can effectively improve sun utilization factor, thereby improves system's generating efficiency.If local sun direct projection component surpasses 70%, the gain of generated energy may surpass 40%.In solar energy photovoltic power system, the improved efficiency space of the equipment such as assembly, inverter, transformer, controller is less, and through research, the support of appropriate design solar photovoltaic tracking system can improve the efficient of solar photovoltaic generation system to a certain extent.

Photovoltaic bracket commonly used is divided into two kinds at present: fixed solar bracket system and tracking mode mounting system.Fixed solar bracket system architecture is simple, and reliability is high, but due to the inclination angle that can not adjust assembly, year generating efficiency is lower; The tracking mode mounting system can be divided into two types of single-shaft tracking system and dual-axis tracking systems substantially, it is advantageous that dual-axis tracking system year generating efficiency is the highest, cost is relatively high, the structure relative complex, technical requirement is higher, single-shaft tracking system year, generating efficiency was higher, and cost is lower than dual-axis tracking system.

Because tiltedly the single-shaft tracking system wind resistance is poor, therefore oblique uniaxial tracking bracket is used less in actual photovoltaic power generation project, and this defective is caused by the support self structure, and single-machine capacity is larger, and this defective is more obvious.Because large-scale power station is generally located at northwest or Desert Area, wind speed is larger, easily oblique single-shaft tracking system is caused damage.

Summary of the invention

Technical matters to be solved by this invention is for the defective in aforementioned background art and deficiency; a kind of solar inclined single-shaft tracker down wind laying-down device is provided; it can be controlled oblique uniaxiality tracking device and automatically set level during greater than setting value at wind speed; can normally follow the tracks of solar azimuth during less than the wind speed design load, effectively protect the safety of tracker.

The present invention is for solving the problems of the technologies described above, and the technical scheme that adopts is:

A kind of solar inclined single-shaft tracker down wind laying-down device comprises reducing motor, rotation axis, the first scrambler, support, weathervane, the second scrambler, air velocity transducer, module for reading and writing and controller; Support is fixed in ground, and deceleration blower fan and spacer support frame certain distance also are fixed in ground;

Rotation axis is fixed on support, and the one end is connected with reducing motor, under the driving of reducing motor with from rotating as axle;

The interior axle of the first scrambler is fixedly connected with rotation axis, and its outer shaft is connected with support;

The mobile jib of weathervane is fixedly connected with the other end of rotation axis, and the rotating shaft of weathervane is connected with the interior axle of the second scrambler, the outer shaft connection bracket of described the second scrambler;

Module for reading and writing connects respectively air velocity transducer and first and second scrambler, reads respectively the positional value of real-time wind velocity signal and first and second scrambler;

Module for reading and writing also is connected with controller, and the positional value of first and second scrambler of reading and the wind velocity signal of air velocity transducer are sent into controller, and drives the operation of reducing motor under it is controlled.

Above-mentioned weathervane keeps vertical with rotation axis.

Above-mentioned the first scrambler is increment type or absolute type, and the second scrambler is absolute type.

after adopting such scheme, the present invention is directed to the poor problem of aforementioned oblique uniaxiality tracking device wind resistance, the control thought that down wind is set level is proposed, utilize air velocity transducer to obtain current wind speed, when wind speed during greater than design load, obtain the positional value of solar panels by the second scrambler, real-time position angle in conjunction with the current sun, adjust rotation direction and the angle of rotation axis, rotation axis is set level in the direction of wind speed Automatic-searching windage minimum during greater than setting value, effectively protect the safety of tracker, simple in structure, both can normally follow the tracks of solar azimuth, can protect oblique uniaxiality tracking device again under extreme wind speeds.

Description of drawings

Fig. 1 is workflow schematic diagram of the present invention;

Fig. 2 is structural representation of the present invention.

Embodiment

Below with reference to accompanying drawing, technical scheme of the present invention is elaborated.

At first with reference to shown in Figure 2, the invention provides a kind of solar inclined single-shaft tracker down wind laying-down device, comprise reducing motor 1, rotation axis 2, the first scrambler 3, support 4, weathervane 6, the second scrambler 7, air velocity transducer 8, module for reading and writing and controller, adopt respectively 51 single-chip microcomputer module for reading and writing 9 and PLC Programmable Logic Controller 5 in the present embodiment, the below introduces respectively.

Support 4 is fixed in ground, in order to support some solar panels 10, sun power is converted to electric energy.

Deceleration blower fan 1 keeps at a certain distance away with support 4, also is fixed in ground.

Rotation axis 2 is fixed on support 4, and the one end is connected with reducing motor 1, under the driving of reducing motor 1 with from rotating as axle.

The interior axle of the first scrambler 3 is fixedly connected with rotation axis 2, and can synchronously rotate with rotation axis 2, and its outer shaft is connected with support 4; Described the first scrambler 3 is increment type or absolute type, and it also connects 51 single-chip microcomputer module for reading and writing, reads its positional value for 51 single-chip microcomputer module for reading and writing 9.

The mobile jib 61 of weathervane 6 is fixedly connected with the other end of rotation axis 2, and make weathervane 6 keep vertical with rotation axis 2, therefore weathervane 6 is with the angle on ground the inclination angle that 90 degree deduct rotation axis 2, when strong wind comes interim, the sensing of weathervane 6 is the direction of its stressed minimum, the position consistency of setting level with solar panels 10 front down winds; And the rotating shaft of weathervane 6 is connected with the interior axle of the second scrambler 7, and described the second scrambler 7 is absolute type, and its outer shaft is connected with support 4, and the second scrambler 7 also connects 51 single-chip microcomputer module for reading and writing 9, reads the real time position value for it.

Air velocity transducer 8 is connected with 51 single-chip microcomputer module for reading and writing 9, and the real-time wind velocity signal that obtains is sent to 51 single-chip microcomputer module for reading and writing 9.

51 single-chip microcomputer module for reading and writing 9 are connected with PLC Programmable Logic Controller 5, first and second scrambler 3 of reading, 7 positional value and the wind velocity signal of air velocity transducer 8 are sent into PLC Programmable Logic Controller 5, and drive the operation of reducing motor 1 under it is controlled.

PLC Programmable Logic Controller 5 is used for the related data that computing 51 single-chip microcomputer module for reading and writing 9 send, and direction and angle that rotation axis 2 is needed to rotate send to 51 single-chip microcomputer module for reading and writing 9.

Below will coordinate Fig. 1 that the course of work of the present invention and principle are described:

(1) wind speed judgement

Air velocity transducer 8 sends current wind speed to 51 single-chip microcomputer module for reading and writing 9,51 single-chip microcomputer module for reading and writing 9 and judges that whether wind speed is greater than design load (as 16m/s);

(2) 51 single-chip microcomputer module for reading and writing 9 read first and

second scrambler

3,7 current location value, and are sent to PLC Programmable Logic Controller 5

When wind speed during greater than design load, 51 single-chip microcomputer module for reading and writing 9 read first and

second scrambler

3,7 positional value; During less than design load, 51 single-chip microcomputer module for reading and writing 9 only read the positional value of the first scrambler 3 when wind speed; And the aforementioned location value is sent to PLC Programmable Logic Controller 5.

(3) PLC Programmable Logic Controller 5 is processed the positional value that is sent by 51 single-chip microcomputer module for reading and writing 9

When wind speed during less than design load, PLC Programmable Logic Controller 5 with the positional value of the first scrambler 3 and the sun real-time position angle relatively will both subtract each other, and the differential seat angle and the first scrambler 3 that obtain both need the direction of rotating; The real-time position angle of the sun wherein

Figure 2010106137921100002DEST_PATH_IMAGE001

To adopt following formula gained by PLC Programmable Logic Controller 5:

Wherein

Be sun altitude,

Be local latitude,

Be declination angle,

Be hour angle;

Certainly, also can adopt sun altitude herein

Represent (computing formula sees above), correspondingly the positional value of the first scrambler 3 also need adopt its elevation angle.

When wind speed during greater than design load, PLC Programmable Logic Controller 5 calculates relatively first and

second scrambler

3,7 positional value, deduct the positional value of the second scrambler 7 with the positional value of the first scrambler 3, the absolute value of difference is the angle that need set level, can determine the rotation direction of reducing motor 1 according to the sign symbol of difference, rotating direction herein can freely define.

(4) PLC Programmable Logic Controller 5 sends to 51 single-chip microcomputer module for reading and writing 9 with steering order, controls reducing motor by 51 single-chip microcomputer module for reading and writing 9 and rotates.

When wind speed during less than design load, PLC Programmable Logic Controller 5 sends normal operating instruction (positional value by real time position and the first scrambler 3 relatively obtains) to 51 single-chip microcomputer module for reading and writing 9, the latter controls and drives reducing motor 1, makes solar panels 10 towards consistent with solar azimuth; When wind speed during greater than design load, PLC Programmable Logic Controller 5 sends down winds and sets level instruction (calculated by first and

second scrambler

3,7 positional value and obtain) to 51 single-chip microcomputer module for reading and writing 9, then 51 single-chip microcomputer module for reading and writing 9 are controlled and are driven reducing motor 1, make solar panels 10 towards consistent with the minimum direction of windage.Aforementioned normal operating instruction and down wind are set level rotation direction and the angle that instruction includes reducing motor 1.

Above embodiment only for explanation technological thought of the present invention, can not limit protection scope of the present invention with this, every technological thought that proposes according to the present invention, and any change of doing on the technical scheme basis is within all falling into protection domain of the present invention.

Claims

1. a solar inclined single-shaft tracker down wind laying-down device, is characterized in that: comprise reducing motor, rotation axis, the first scrambler, support, weathervane, the second scrambler, air velocity transducer, module for reading and writing and controller; Support is fixed in ground, and reducing motor and spacer support frame certain distance also are fixed in ground;

2. solar inclined single-shaft tracker down wind laying-down device as claimed in claim 1 is characterized in that: described weathervane keeps vertical with rotation axis.

3. solar inclined single-shaft tracker down wind laying-down device as claimed in claim 1, it is characterized in that: described the first scrambler is increment type or absolute type, the second scrambler is absolute type.