Flat single axis tracking system

Abstract

The utility model relates to a flat single-axis tracking system. The flat single-axis tracking system comprises a photovoltaic grid-connected distribution box, a current transformer, a current controller, and a single-phase AC contactor. Any phase line of the low-voltage three-phase line of the grid-side output end line of the photovoltaic grid-connected distribution box penetrates into the through-core induction input end of the current transformer, and the secondary terminal output end of the current transformer is connected to a detection S1 / S2 input end of the current controller as a current signal input; another L / N input end of the current controller is connected to the grid-side output end line L / N of the photovoltaic grid-connected distribution box, and the two lines are respectively connected to an arbitrary phase L phase line and a neutral line N as an AC 220V power input; one NO / COM / NC two-link switch contact output end of the current controller: one COM / NC output line and the neutral line N of the other input end of the current controller are used together as the power input end of the single-phase AC contactor to control the AC 220V power output. The flat single-axis tracking system avoids unnecessary power loss.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic power generation, in particular to a flat single-axis tracking system. Background Art

[0002] The tracking system in the solar photovoltaic power generation system is used to track the sun according to the trajectory of the sun, so that the solar photovoltaic power generation components installed on the tracking system can always face the direction of sunlight, thereby increasing the amount of solar radiation received by the photovoltaic power generation components and increasing the power generation of the solar photovoltaic power generation system. The flat single-axis tracking system is a commonly used solar tracking system. The flat single-axis tracking system usually includes a support structure, a rotating mechanism and a controller. The solar photovoltaic panel is installed on the support structure. The rotating mechanism is rotatably connected to the support structure. The controller controls the rotation of the rotating mechanism and correspondingly controls the rotation of the solar photovoltaic panel on the support structure, and automatically adjusts the angle of the solar photovoltaic panel to maximize the absorption of solar energy.

[0003] The existing controller is a time relay, which adjusts the stroke of the rotating mechanism according to time changes to achieve the adjustment of the angle of the solar photovoltaic panel.

[0004] In the actual operation of the flat single-axis tracking system, there are the following problems: when encountering rainy, snowy weather or equipment failure, the solar photovoltaic panel stops generating electricity, the controller continues to work with power, and the rotating mechanism still rotates and adjusts the angle of the solar photovoltaic panel according to time, resulting in unnecessary power loss. Summary of the invention

[0005] The technical problem to be solved by the utility model is that when the flat single-axis tracking system encounters rainy and snowy weather and equipment failure, the solar photovoltaic panel stops generating electricity, but the controller continues to work with power, and the rotating mechanism still rotates and adjusts the angle of the solar photovoltaic panel according to time, resulting in unnecessary power loss.

[0006] In order to solve the above technical problems, according to the utility model, a flat single-axis tracking system is provided, which includes a photovoltaic grid-connected distribution box, a current transformer, a current controller, and a single-phase AC contactor.

[0007] Any phase line of the low-voltage three-phase circuit of the grid-side output end circuit of the photovoltaic grid-connected distribution box penetrates into the through-core induction input end of the current transformer, and the secondary terminal output end of the current transformer is connected to the detection S1 / S2 input end of the current controller as a current signal input;

[0008] Another L / N input end of the current controller is connected to the grid-side output end line L / N of the photovoltaic grid-connected distribution box, and the two lines are respectively connected to an arbitrary phase L line and a neutral line N as an AC 220V power input;

[0009] The NO / COM / NC two-way switch contact output terminal of the current controller: a COM / NC output line and a neutral line N of another input terminal of the current controller are used together as the control AC 220V power output to access the power input terminal of the single-phase AC contactor.

[0010] Preferably, the flat single-axis tracking system also includes a support structure and a rotating mechanism, the solar photovoltaic panel is installed on the support structure, the rotating mechanism is rotatably connected to the support structure, the current controller controls the rotation of the rotating mechanism, and correspondingly controls the rotation of the solar photovoltaic panel on the support structure, thereby automatically adjusting the angle of the solar photovoltaic panel.

[0011] Furthermore, the support structure includes a support and a column, and the support for installing the solar photovoltaic power generation component panel is pivotally installed on the column through the rotating mechanism.

[0012] Preferably, the photovoltaic grid-connected distribution box includes a photovoltaic side input terminal, and the photovoltaic side input terminal is connected to the solar photovoltaic panel.

[0013] Preferably, the model of the current controller is F509.

[0014] Preferably, the current controller can be replaced by a power controller or a multi-function electric meter.

[0015] Compared with the prior art, the flat single-axis tracking system provided by the embodiment of the utility model can achieve at least the following beneficial effects:

[0016] First, when the solar photovoltaic panel stops generating electricity, the power supply of the control device is cut off, and the flat single-axis tracking system stops working, thereby reducing unnecessary power loss;

[0017] Second, when the solar photovoltaic panels resume power generation, the power supply of the control equipment is restored, and the flat single-axis tracking system resumes working to ensure normal power generation needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present utility model, rather than limiting the present utility model.

[0019] Figure 1 A schematic diagram of grid connection for the flat single-axis tracking system provided by the utility model;

[0020] Figure 2 for Figure 1 Preferred parameters for the current controller are shown. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Unless otherwise defined, the technical or scientific terms used herein shall have the common meanings understood by persons with ordinary skills in the field to which the utility model belongs. The words "first", "second" and similar words used in the patent application specification and claims of the utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not indicate a quantity limitation, but indicate the existence of at least one.

[0023] like Figure 1 As shown, a flat single-axis tracking system of the utility model includes a support structure, a rotating mechanism and a current controller 2. The solar photovoltaic panel is installed on the support structure. The rotating mechanism is rotatably connected to the support structure. The current controller 2 controls the rotation of the rotating mechanism, and correspondingly controls the rotation of the solar photovoltaic panel on the support structure, thereby automatically adjusting the angle of the solar photovoltaic panel.

[0024] Wherein, the support structure comprises a support and a column, and the support for installing the solar photovoltaic power generation component panel is pivotally installed on the column through the rotating mechanism.

[0025] It includes a photovoltaic grid-connected distribution box 1, a current transformer 2, a current controller 3, and a single-phase AC contactor 4.

[0026] The photovoltaic grid-connected distribution box 1 is composed of a knife switch and a circuit breaker, and has a photovoltaic side input terminal and a grid side output terminal. The photovoltaic side input terminal is connected to the solar photovoltaic panel.

[0027] The current transformer 2 consists of a middle through-hole inductive input terminal and a secondary wiring terminal output terminal.

[0028] The current controller 3 has one detection S1 / S2 input terminal, one power supply L / N two input terminals and one NO / COM / NC two-link switch contact output terminal. Preferably, the current controller 3 model is F509, and the specific parameters are as follows Figure 2 shown.

[0029] The single-phase AC contactor 4 has a power input terminal, and the single-phase AC contactor 4 is switched on and off to control the start and stop of the device.

[0030] Among them, any phase line of the low-voltage three-phase line of the grid-side output end line of the photovoltaic grid-connected distribution box 1 penetrates into the through-core induction input end of the current transformer 2, and the secondary terminal output end of the current transformer 2 is connected to the detection S1 / S2 input end of the current controller as a current signal input; another L / N input end of the current controller 3 is connected to the grid-side output end line L / N of the photovoltaic grid-connected distribution box 1, and the two lines are respectively connected to an arbitrary phase L phase line and a neutral line N as an AC 220V power input; one NO / COM / NC two-phase switch contact output end of the current controller 3: a COM / NC output line and the neutral line N of the other input end of the current controller 3 are used together as the power input end of the single-phase AC contactor 4 to control the AC 220V power output.

[0031] The flat single-axis tracking system adds a current transformer 2 and a current controller 3 on the low-voltage side of the photovoltaic grid-connected distribution box 1 to realize dual control of current and time. The specific control method is:

[0032] When the current collected by the current transformer 2 is less than the set value, the power supply of the control device is cut off, and the flat single-axis control system stops working to reduce energy consumption;

[0033] When the current collected by the current transformer 2 is greater than the set value, the power supply of the control device is restored and the flat single-axis control system works normally.

[0034] The set value can refer to the current of the control device during normal operation when the solar photovoltaic panel stops generating electricity, thereby distinguishing whether the solar photovoltaic panel is in a working state of stopping generating electricity or generating electricity normally.

[0035] This embodiment can be further expanded, and specifically the current controller 3 can be replaced by a power controller or a multi-function electric meter.

[0036] This embodiment is an improvement on the existing equipment. In particular, after the improvement, the failure rate of the control equipment is reduced from 11 times to 8 times per year, the standby time of the control equipment is reduced by about 13 hours per day, and 0.16 kWh of electricity is saved. According to statistics, due to extreme weather such as rain and snow, the control equipment is not connected to the grid for about 10 days each year and is in standby mode.

[0037] Taking the GCL Power Station in Yu County as an example, after improvement, the 100MW installed capacity can save 360,000 kilowatts of electricity per year, with electricity costs of about 220,000 yuan (the electricity price of GCL in Yu County is 0.61 yuan / Kwh).

[0038] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. A flat single-axis tracking system, including a photovoltaic grid-connected distribution box, a current transformer, a current controller, and a single-phase AC contactor, characterized in that: Any phase line of the low-voltage three-phase circuit of the grid-side output end circuit of the photovoltaic grid-connected distribution box penetrates into the through-core induction input end of the current transformer, and the secondary terminal output end of the current transformer is connected to the detection S1 / S2 input end of the current controller as a current signal input; Another L / N input end of the current controller is connected to the grid-side output end line L / N of the photovoltaic grid-connected distribution box, and the two lines are respectively connected to an arbitrary phase L line and a neutral line N as an AC 220V power input; One NO / COM / NC two-way switch contact output terminal of the current controller: one COM / NC output line and the neutral line N of the other input terminal of the current controller are used together as the power input terminal of the single-phase AC contactor to control the AC 220V power output; Wherein, it also includes a support structure and a rotating mechanism, the solar photovoltaic panel is installed on the support structure, the rotating mechanism is rotatably connected to the support structure, the current controller controls the rotation of the rotating mechanism, and correspondingly controls the rotation of the solar photovoltaic panel on the support structure, and automatically adjusts the angle of the solar photovoltaic panel; The photovoltaic grid-connected distribution box also includes a photovoltaic side input terminal, and the photovoltaic side input terminal is connected to the solar photovoltaic panel.

2. The flat single-axis tracking system according to claim 1, characterized in that: The support structure comprises a support and a column, and the support for installing a solar photovoltaic power generation component panel is pivotally installed on the column through the rotating mechanism.

3. The flat single-axis tracking system according to claim 1, characterized in that: The model of the current controller is F509.

4. The flat single-axis tracking system according to claim 1, characterized in that: The current controller may be replaced by a power controller or a multi-function electric meter.

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