Common network system applied to flexible photovoltaic power generation

Abstract

The invention relates to the field of photovoltaic power generation application, in particular to a photovoltaic power common-network application system. The photovoltaic power common-network application system is composed of flexible photovoltaic cells (the length of each cell is approximate to the length of a power transmission line) wrapped on n paths (n is larger than 1) of power transmission lines on the two sides of each electric pole, and power with consistent direct-current voltage parameters is output on each photovoltaic cell. And the control device is fixed on a telegraph pole. The control device comprises a protection diode junction station, an inverter and a transformer. And the n paths of photovoltaic direct current power sequentially enter a junction station, an inverter and a transformer in the control device and are converted into alternating current consistent with municipal voltage to be connected into a power grid. The method has the advantages that electric loss in a low-voltage power transmission network is reduced, and power utilization of a communication base station, emergency power utilization and the like can be guaranteed under the conditions of possible natural disasters, wars and the like.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic power generation applications, and in particular to a system for applying photovoltaic power to a common grid. Background Art

[0002] Currently, photovoltaic power stations are divided into centralized and distributed types, but both have certain requirements for the placement of photovoltaic cells, leading to limitations. At the same time, my country's rural and mountainous areas still have a large number of low-voltage transmission networks. Low-voltage transmission networks have the advantages of easy installation and low cost, but low-voltage transmission lines are characterized by high power losses and weak resistance to natural risks.

[0003] In view of this, the present invention is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a flexible photovoltaic power generation application grid-sharing system, which is a system that applies photovoltaic power to the grid.

[0005] The objectives of the present invention are achieved through the following technical solutions.

[0006] A common grid system for flexible photovoltaic power generation applications includes a power generation device and a control device. The structure diagram is as follows: Figure 1 shown.

[0007] The power generation device of the present invention consists of flexible photovoltaic cells (the length of each cell is approximately the same as the length of the transmission line) wrapped around n (n is greater than 1) transmission lines on both sides of each pole. Each photovoltaic cell outputs electricity with consistent DC voltage parameters, which is fed into a control device fixed on the pole.

[0008] According to DL / T5220-2005 "10KV and below overhead distribution line design technical regulations" and other relevant regulations, the commonly used low-voltage line, commonly used cross section: 16mm 2 , 25mm 2 , 35mm 2 , 50mm 2 Corresponding circumference: 14-16mm, 18-20mm, 20-22mm, 22-25mm. Corresponding load-bearing capacity: 40-50kg, 60-70kg, 80-90kg, 110-130kg.

[0009] The flexible photovoltaic cell used in this invention has an operating voltage of 6V, a power of about 6.45W, a size of 10,000mm in length, 10mm in width, 0.8mm in thickness, and weighs about 161g. The distance between two utility poles is generally 50-80 meters, so the load generated by the photovoltaic cell on a single transmission line is 805g. - 1288g. Wrapped around power lines with adhesive.

[0010] The control device of the present invention includes a control box mounted on a utility pole. The box contains a protective diode, a shunt, an inverter, and a transformer. N (n greater than 1) photovoltaic DC power flows sequentially into the shunt, inverter, and transformer within the control device, where it is converted into AC power consistent with the municipal voltage and then fed into the power grid.

[0011] This invention achieves the effect of a "micro photovoltaic power station," compensating for the high power losses in low-voltage transmission lines. The system is also independent of the municipal power transmission network. If a natural disaster forces a power outage, or if the integrity of the power transmission network is damaged due to war, users can directly connect to the controller for emergency power. This also prevents power outages at signal base stations located outdoors. The flexible photovoltaic cells used in this system are lightweight, weighing between 805g and 1288g for a length of 50-80 meters (an adult sparrow weighs about 500g). This reduces the extra weight on the transmission lines and, while wrapping them, reduces rainwater corrosion, extending their service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work.

[0013] Figure 1 This is a structural diagram of the grid-sharing system for flexible photovoltaic power generation applications.

[0014] FIG2 is a schematic structural diagram of a power generation device (2-1 is a cross-sectional view; 2-2 is a top view).

[0015] Figure 3 It is a structural diagram of the control device.

[0016] 1. Utility pole; 2. Control device; 3. Power generation device; 4. Transmission line; 5. Flexible battery; 6. Flexible battery bonding part; 7. Flexible battery connecting wire; 8. Protection diode busbar; 9. Inverter; 10. Transformer. DETAILED DESCRIPTION

[0017] A common grid system for flexible photovoltaic power generation applications includes a power generation device and a control device. The workflow is performed according to the following steps:

[0018] Step 1: Photovoltaic power with consistent DC voltage parameters on n channels (n is greater than 1) on both sides of each pole enters the controller.

[0019] Step 2: n (n is greater than 1) DC currents enter the protection diode bus.

[0020] Step 3: The merged DC power enters the inverter and is converted into AC power.

[0021] Step 4: The AC power enters the transformer and becomes consistent with the municipal voltage and is connected to the power grid.

[0022] The above is an explanation of this patent. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A flexible photovoltaic power generation application grid-sharing system, characterized by: Power generation device, control device, the system converts photovoltaic DC power into the municipal power grid through inversion and transformation. The power generation device wraps flexible photovoltaic cells on a low-voltage transmission line, and collects the photovoltaic power with consistent DC voltage parameters on n lines on both sides of each pole into the controller of the pole. The n (n is greater than 1) photovoltaic cells on both sides constitute a power generation device. The control device includes a protective diode, a shunt, an inverter, and a transformer. The n-way photovoltaic DC power sequentially enters the shunt, inverter, and transformer within the control device, becoming AC power consistent with the municipal voltage and then fed into the power grid.

2. The flexible photovoltaic power generation application grid-sharing system according to claim 1 is characterized in that The photovoltaic power is connected to the control device where the combiner, inverter and transformer are located, and then connected to the municipal power grid for power supply.

3. The flexible photovoltaic power generation application common grid system according to claim 2 is characterized in that It ensures that photovoltaic power can be used immediately.

4. The flexible photovoltaic power generation application common grid system according to claim 3 is characterized in that Each system exists independently of the municipal power supply system. If the municipal power supply system is cut off, this common grid system can still continue to supply power.

5. The flexible photovoltaic power generation application grid-sharing system according to claim 4 is characterized in that The power generation device is a flexible photovoltaic cell wrapped around the transmission line.

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