A distributed photovoltaic power generation energy cascade regulation device arranged in a wind farm

Abstract

The application discloses a distributed photovoltaic power generation energy step adjusting device arranged in a wind power plant, wherein the output end of a first wind turbine power generation facility is connected with a first free end of a double power supply switch, the output end of a second wind turbine power generation facility is connected with a second free end of the double power supply switch, and the output end of a photovoltaic power generation facility is connected with a fixed end of the double power supply switch; the output end of a wind turbine current sensor, the output end of a photovoltaic current sensor, the output end of a wind turbine voltage sensor and the output end of a photovoltaic voltage sensor are connected with a data processing computer, the data processing computer is connected with a double circuit switch controller and an inverter controller, the double circuit switch controller is connected with a control end of the double power supply switch, and the output end of the inverter controller is connected with a control end of an inverter.

Description

Technical Field

[0001] The present invention relates to an energy cascade regulating device, in particular to a distributed photovoltaic power generation energy cascade regulating device arranged in a wind farm. Background Art

[0002] At present, the ways of connecting distributed photovoltaic to the grid system are as follows: Figure 2 As shown, photovoltaic power generation facilities absorb solar energy and convert it into direct current, which is then converted into 380V AC by an inverter. The voltage is then increased to 10kV / 35kV by a step-up transformer in the public power grid and transmitted to other users with larger electricity consumption.

[0003] At present, the ways of connecting wind power generation to the power grid system are as follows: Figure 3 As shown, the wind turbine converts wind energy into electrical energy, which is then converted into 10kV / 35kV AC power through a step-up transformer. This can be distributed and connected to the public power grid, or the power generated by multiple wind turbines can be combined and then transmitted to other users with larger electricity consumption after secondary boosting.

[0004] Currently, photovoltaic power generation facilities and wind turbine power generation facilities operate independently. Wind and photovoltaic power generation are affected by seasonal variations, the alternation of day and night, and the weather, resulting in poor stability. During sunny days, photovoltaic power generation is highly efficient, while on rainy days and at night, photovoltaic equipment is unable to generate power. However, at night, ground temperature differences vary significantly, and winds are stronger. Effectively integrating these two technologies can significantly improve the utilization of power transmission and distribution equipment and conserve resources. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a distributed photovoltaic power generation energy cascade regulation device arranged in a wind farm, which can effectively improve the effective utilization rate of power transmission and transformation equipment.

[0006] To achieve the above-mentioned objectives, the wind farm distributed photovoltaic power generation energy cascade regulation system described in the present invention includes a first wind turbine power generation facility, a first user power grid, a second wind turbine power generation facility, a second user power grid, a photovoltaic power generation facility, a dual-power supply switch, a dual-circuit switching controller, an inverter controller, a data processing computer, a power supply module for providing electric energy, a wind turbine current sensor for detecting the current at the output ends of the first wind turbine power generation facility and the second wind turbine power generation facility, a wind turbine voltage sensor for detecting the voltage at the output ends of the first wind turbine power generation facility and the second wind turbine power generation facility, a photovoltaic voltage sensor for detecting the voltage at the output end of the photovoltaic power generation facility, and a photovoltaic current sensor for detecting the current at the output end of the photovoltaic power generation facility;

[0007] The output end of the first wind turbine power generation facility is connected to the first user grid and the first free end of the dual power switch, the output end of the second wind turbine power generation facility is connected to the second user grid and the second free end of the dual power switch, and the output end of the photovoltaic power generation facility is connected to the fixed end of the dual power switch;

[0008] The output end of the wind turbine current sensor, the output end of the photovoltaic current sensor, the output end of the wind turbine voltage sensor and the output end of the photovoltaic voltage sensor are connected to the data processing computer, the data processing computer is connected to the dual-circuit switching controller and the inverter controller, the dual-circuit switching controller is connected to the control end of the dual power supply switch, and the output end of the inverter controller is connected to the control end of the inverter.

[0009] The output end of the wind turbine current sensor and the output end of the photovoltaic current sensor are connected to the data processing computer via the current signal conditioning and acquisition module.

[0010] The output end of the wind turbine voltage sensor and the output end of the photovoltaic voltage sensor are connected to the data processing computer via the voltage signal conditioning and acquisition module.

[0011] The data processing computer is connected with the voltage signal conditioning and acquisition module, the current signal conditioning and acquisition module, the dual-circuit switching controller and the inverter controller via a wireless data transfer station.

[0012] The data processing computer is connected with the voltage signal conditioning and acquisition module, the current signal conditioning and acquisition module, the dual-circuit switching controller and the inverter controller via the wireless data transfer station and the wireless data transmission module.

[0013] The present invention has the following beneficial effects:

[0014] During the specific operation of the distributed photovoltaic power generation energy cascade regulation device arranged in a wind farm described in the present invention, a data processing computer detects the electrical parameters of the first wind turbine power generation facility, the second wind turbine power generation facility and the photovoltaic power generation facility through a wind turbine current sensor, a wind turbine voltage sensor, a photovoltaic current sensor and a photovoltaic voltage sensor, and controls the dual power supply switch and the inverter accordingly. By adjusting the transmission path of the electric energy, the maximum output of the distributed photovoltaic power is achieved, thereby improving the effective utilization rate of the power transmission and transformation equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 This is the structural diagram of the distributed photovoltaic grid access system;

[0017] Figure 3 Structural diagram of the wind power generation grid connection system.

[0018] Among them, 1 is the wind turbine current sensor, 2 is the wind turbine voltage sensor, 3 is the photovoltaic current sensor, 4 is the photovoltaic voltage sensor, 5 is the dual power supply switch, 6 is the current signal conditioning and acquisition module, 7 is the voltage signal conditioning and acquisition module, 8 is the dual-circuit switching controller, 9 is the inverter controller, 10 is the wireless data transmission module, 11 is the power module, 12 is the wireless data transfer station, and 13 is the data processing computer. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only embodiments of a part of the present invention, not all embodiments, and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts disclosed in the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0020] The accompanying drawings illustrate schematic diagrams of the structures of the disclosed embodiments of the present invention. These figures are not drawn to scale; for the purpose of clarity, some details are exaggerated and some details may be omitted. The shapes of the various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions as needed.

[0021] refer to Figure 1 The wind farm distributed photovoltaic power generation energy cascade regulation system of the present invention includes a wind turbine current sensor 1, a wind turbine voltage sensor 2, a photovoltaic current sensor 3, a photovoltaic voltage sensor 4, a dual power supply switch 5, a current signal conditioning and acquisition module 6, a voltage signal conditioning and acquisition module 7, a dual-circuit switching controller 8, an inverter controller 9, a wireless data transmission module 10, a power supply module 11, a wireless data transfer station 12, and a data processing computer 13;

[0022] The output end of the first wind turbine power generation facility is connected to the first user grid and the first free end of the dual power switch 5, the output end of the second wind turbine power generation facility is connected to the second user grid and the second free end of the dual power switch 5, and the output end of the photovoltaic power generation facility is connected to the fixed end of the dual power switch 5;

[0023] The output end of the wind turbine current sensor 1 and the output end of the photovoltaic current sensor 3 are connected to the input end of the current signal conditioning and acquisition module 6, and the output end of the wind turbine voltage sensor 2 and the output end of the photovoltaic voltage sensor 4 are connected to the input end of the voltage signal conditioning and acquisition module 7; the data processing computer 13 is connected to the wireless data transfer station 12, and the wireless data transfer station 12 is connected to the current signal conditioning and acquisition module 6, the voltage signal conditioning and acquisition module 7, the dual-circuit switching controller 8 and the inverter controller 9 via the wireless data transmission module 10, the dual-circuit switching controller 8 is connected to the control end of the dual power supply switch 5, and the output end of the inverter controller 9 is connected to the control end of the inverter.

[0024] The specific working process of the present invention is:

[0025] The current signal at the output end of the first wind turbine power generation facility and the second wind turbine power generation facility is detected by the wind turbine current sensor 1; the voltage signal at the output end of the first wind turbine power generation facility and the second wind turbine power generation facility is detected by the wind turbine voltage sensor 2; the current signal at the output end of the photovoltaic power generation facility is detected by the photovoltaic current sensor 3; and the voltage signal at the output end of the photovoltaic power generation facility is detected by the photovoltaic voltage sensor 4;

[0026] The current signal output by the wind turbine current sensor 1 and the current signal output by the photovoltaic current sensor 3 are amplified and filtered by the current signal conditioning and acquisition module 6 and then input into the data processing computer 13;

[0027] The voltage signal output by the wind turbine voltage sensor 2 and the voltage signal output by the photovoltaic voltage sensor 4 are amplified and filtered by the voltage signal conditioning and acquisition module 7 and then input into the data processing computer 13;

[0028] The data processing computer 13 generates a control signal and a switching signal according to the received signal. The dual-circuit switching controller 8 controls the dual-power switching switch 5 according to the switching signal. The inverter controller 9 controls the inverter according to the control signal.

[0029] The present invention can realize rapid switching of photovoltaic power generation circuits and automatic adjustment of photovoltaic power generation as wind turbine power generation fluctuates. By detecting the electric energy value of each transmission link in the wind farm, the transmission path of the electric energy is adjusted through the dual-circuit switching controller 8 and the inverter controller 9, thereby achieving the maximum output of distributed photovoltaic power.

[0030] In addition, in actual applications, by real-time monitoring of photovoltaic equipment, analyzing the operating status of the equipment, scientifically and effectively using big data analysis, establishing an energy tree, determining the thresholds of each node, and analyzing various operating modes, the probability of reduced power generation due to accidental shutdowns and component failures can be reduced.

Claims

1. A wind farm distributed photovoltaic power generation energy cascade regulation system, characterized in that: The invention comprises a first wind turbine power generation facility, a first user power grid, a second wind turbine power generation facility, a second user power grid, a photovoltaic power generation facility, a dual power supply switch (5), a dual-circuit switching controller (8), an inverter controller (9), a data processing computer (13), a power supply module (11) for providing electric energy, a wind turbine current sensor (1) for detecting the current at the output end of the first wind turbine power generation facility and the second wind turbine power generation facility, a wind turbine voltage sensor (2) for detecting the voltage at the output end of the first wind turbine power generation facility and the second wind turbine power generation facility, a photovoltaic voltage sensor (4) for detecting the voltage at the output end of the photovoltaic power generation facility, and a photovoltaic current sensor (3) for detecting the current at the output end of the photovoltaic power generation facility; The output end of the first wind turbine power generation facility is connected to the first user grid and the first free end of the dual power supply switch (5), the output end of the second wind turbine power generation facility is connected to the second user grid and the second free end of the dual power supply switch (5), and the output end of the photovoltaic power generation facility is connected to the fixed end of the dual power supply switch (5); The output end of the wind turbine current sensor (1), the output end of the photovoltaic current sensor (3), the output end of the wind turbine voltage sensor (2), and the output end of the photovoltaic voltage sensor (4) are connected to a data processing computer (13), the data processing computer (13) is connected to a dual-circuit switching controller (8) and an inverter controller (9), the dual-circuit switching controller (8) is connected to a control end of a dual power supply switch (5), and the output end of the inverter controller (9) is connected to a control end of the inverter; The output end of the wind turbine current sensor (1) and the output end of the photovoltaic current sensor (3) are connected to the data processing computer (13) via the current signal conditioning and acquisition module (6); The output end of the wind turbine voltage sensor (2) and the output end of the photovoltaic voltage sensor (4) are connected to the data processing computer (13) via the voltage signal conditioning and acquisition module (7); The data processing computer (13) is connected to the voltage signal conditioning and acquisition module (7), the current signal conditioning and acquisition module (6), the dual-circuit switching controller (8) and the inverter controller (9) via the wireless data transfer station (12) and the wireless data transmission module (10).

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