Connected grid wind-light complementation control inverting device

Abstract

The invention aims to provide a connected grid wind-light complementation control inverting device which comprises a storage battery charging unit, a DC-DC voltage boosting and stabilizing unit, a connected grid inverting unit and a storage battery; the storage battery charging unit is connected with the DC-DC voltage boosting and stabilizing unit; and the DC-DC voltage boosting and stabilizing unit is connected with the connected grid inverting unit and the storage batter. The device prolongs the power generation time with the complementation of solar energy and wind energy, improves the continuity of the current which is injected into a power grid, and effectively improves the utilization rate of the solar energy and the wind energy; a solar panel automatic tracking system keeps correcting the horizontal angle and the pitch angle of a solar panel, so that the power generation efficiency of a solar power generation system is the highest. The device adopts PWM stepless unloading and ensures the best storage battery charging property; and a current loop of an inverter is realized by an analog device, thereby improving the response speed of a system, ensuring the tracking property of inversion current to the voltage of the power grid, and improving the power factor.

Description

(1) Technical field

[0001] The invention relates to power electronics technology, in particular to a grid-connected wind-solar complementary control inverter device. (2) Background technology

[0002] The traditional grid-connected wind-solar hybrid controller has the following problems: (1) Most of the solar panels use fixed power supply, the solar panels cannot track the incident angle of sunlight in real time, and the utilization rate of solar energy is low; (2) There are also a small number of solar panels that use solar trajectory tracking, that is, calculate the sun's trajectory every day of the year according to the sun's trajectory equation. The disadvantage of this method is that there are accumulated errors in the control system and the motor during operation, and the mechanical deformation of the transmission system, so the tracking effect is not ideal. (3) Most of the grid-connected feedback methods use the grid voltage as the given feedback current. The saturat...

Examples

Embodiment 1

[0041] Example 1: Combining figure 1 , a grid-connected wind-solar hybrid control inverter device of the present invention, which is composed of a battery charging unit (1), a DC-DC step-up voltage stabilizing unit (2), a grid-connected inverter unit (3) and a battery (4) Yes, the battery charging unit (1) is connected to the DC-DC boost voltage stabilization unit (2), and the DC-DC boost voltage stabilization unit (2) is connected to the grid-connected inverter unit (3) and the battery (4). The present invention also has the following technical characteristics:

[0042] The battery charging unit (1) includes a wind power generation unit (8), a solar power generation unit (9) and an unloading circuit (15), the wind power generation unit (8) is connected to the solar power generation unit (9), and the solar power generation unit (9) ) to connect the unloading circuit (15).

[0043] The wind power generation unit (8) comprises a wind turbine (5), a permanent magnet synchronous...

Embodiment 2

[0047] Example 2: Combining figure 1 , figure 2 , Figure 11 , Figure 12 , Figure 20 , Figure 23, a grid-connected wind-solar hybrid control inverter device in the present invention has the following characteristics: the solar tracking control device realizes tracking of the sun incident angle, so that the solar panel maintains the maximum power generation state; the variable voltage and frequency alternating current output by the wind generator is After rectification, it supplies power to the battery together with the direct current generated by the solar panel. In order to prevent the battery from being overcharged, the PWM stepless unloading working method is adopted to realize the overcharge protection of the battery; a high-frequency transformer is used to realize DC-DC conversion, and the low-voltage side Single-phase full-bridge working mode is adopted to realize DC-AC conversion, AC-DC conversion adopts high-frequency transformer, adopts output voltage closed-l...

Embodiment 3

[0052] Example 3: Binding figure 1 , figure 2 , Figure 12 , Figure 19 , Figure 22 , Figure 24 , the present invention adopts the wind-solar complementary method to ensure the complementary power generation in different periods; the charging unit adopts DSP1 as the core control chip, in order to improve the utilization rate of solar energy, adopts solar photoelectric detection method and dual-axis tracking technology to track the sunlight in real time The angle of incidence ensures that the solar panel is perpendicular to the incident light of sunlight, thereby realizing the maximum efficiency utilization of solar power generation devices; Phase full bridge working mode realizes DC-AC conversion, AC-AC conversion adopts high-frequency transformer, AC-DC conversion adopts rectification and low-pass filter to realize, DC-DC step-up voltage stabilization unit is composed of high-frequency transformer and DSP2 as the core components , the optocoupler TLP521 is used to det...

(1) Technical field

[0001] The invention relates to power electronics technology, in particular to a grid-connected wind-solar complementary control inverter device. (2) Background technology

[0002] The traditional grid-connected wind-solar hybrid controller has the following problems: (1) Most of the solar panels use fixed power supply, the solar panels cannot track the incident angle of sunlight in real time, and the utilization rate of solar energy is low; (2) There are also a small number of solar panels that use solar trajectory tracking, that is, calculate the sun's trajectory every day of the year according to the sun's trajectory equation. The disadvantage of this method is that there are accumulated errors in the control system and the motor during operation, and the mechanical deformation of the transmission system, so the tracking effect is not ideal. (3) Most of the grid-connected feedback methods use the grid voltage as the given feedback current. The saturat...

Examples

Embodiment 1

[0041] Example 1: Combining figure 1 , a grid-connected wind-solar hybrid control inverter device of the present invention, which is composed of a battery charging unit (1), a DC-DC step-up voltage stabilizing unit (2), a grid-connected inverter unit (3) and a battery (4) Yes, the battery charging unit (1) is connected to the DC-DC boost voltage stabilization unit (2), and the DC-DC boost voltage stabilization unit (2) is connected to the grid-connected inverter unit (3) and the battery (4). The present invention also has the following technical characteristics:

[0042] The battery charging unit (1) includes a wind power generation unit (8), a solar power generation unit (9) and an unloading circuit (15), the wind power generation unit (8) is connected to the solar power generation unit (9), and the solar power generation unit (9) ) to connect the unloading circuit (15).

[0043] The wind power generation unit (8) comprises a wind turbine (5), a permanent magnet synchronous...

Embodiment 2

[0047] Example 2: Combining figure 1 , figure 2 , Figure 11 , Figure 12 , Figure 20 , Figure 23, a grid-connected wind-solar hybrid control inverter device in the present invention has the following characteristics: the solar tracking control device realizes tracking of the sun incident angle, so that the solar panel maintains the maximum power generation state; the variable voltage and frequency alternating current output by the wind generator is After rectification, it supplies power to the battery together with the direct current generated by the solar panel. In order to prevent the battery from being overcharged, the PWM stepless unloading working method is adopted to realize the overcharge protection of the battery; a high-frequency transformer is used to realize DC-DC conversion, and the low-voltage side Single-phase full-bridge working mode is adopted to realize DC-AC conversion, AC-DC conversion adopts high-frequency transformer, adopts output voltage closed-l...

Embodiment 3

[0052] Example 3: Binding figure 1 , figure 2 , Figure 12 , Figure 19 , Figure 22 , Figure 24 , the present invention adopts the wind-solar complementary method to ensure the complementary power generation in different periods; the charging unit adopts DSP1 as the core control chip, in order to improve the utilization rate of solar energy, adopts solar photoelectric detection method and dual-axis tracking technology to track the sunlight in real time The angle of incidence ensures that the solar panel is perpendicular to the incident light of sunlight, thereby realizing the maximum efficiency utilization of solar power generation devices; Phase full bridge working mode realizes DC-AC conversion, AC-AC conversion adopts high-frequency transformer, AC-DC conversion adopts rectification and low-pass filter to realize, DC-DC step-up voltage stabilization unit is composed of high-frequency transformer and DSP2 as the core components , the optocoupler TLP521 is used to det...

Images