Safety auxiliary control device of small photovoltaic power generation equipment

Abstract

The utility model provides a safety auxiliary control device of small photovoltaic power generation equipment, which relates to the technical field of photovoltaic power generation control and comprises an auxiliary control box, an auxiliary control assembly, a Hall effect sensor, an alarm assembly and a remote auxiliary control module. The auxiliary control assembly comprises a controller, a current sensor, a voltage sensor, a temperature sensor, a communication module and a main control chip, the Hall effect sensor is installed in a power grid system, the alarm assembly comprises a sound alarm and a light alarm, and the remote auxiliary control module is connected with the communication module; according to the utility model, the auxiliary control assembly is arranged to monitor and control the output frequency of the photovoltaic power generation assembly so as to maintain the stable operation of the power grid, and the Hall effect sensing can monitor the magnetic field change of the power grid system so as to judge the state of the power grid system and judge whether the photovoltaic power generation assembly is in isolated island operation. And the alarm assembly, the communication module and the remote auxiliary control module are matched to realize and disconnect power supply of the photovoltaic power generation assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic power generation control, in particular to a safety auxiliary control device for small photovoltaic power generation equipment. Background Art

[0002] With the construction of photovoltaic power generation systems, more and more rural areas have started to build photovoltaic power generation systems. Photovoltaic power generation systems not only provide clean energy, but also face some technical problems. When a power grid fails and causes a power outage, if the photovoltaic power generation system cannot be disconnected from the power grid in time, it may form an island and continue to supply power to the power grid. This not only threatens the safety of power grid operation and maintenance personnel, but also affects the stable operation of the power grid. When the operation and maintenance personnel are inspecting the 10kV and 0.4kV power grids, it is necessary to shut down the distributed photovoltaic power supply to prevent it from returning power to the power grid. Due to the high degree of scattering of small distributed photovoltaic power sources in remote areas such as rural areas, the operation and maintenance personnel will face great work pressure when they rush to the scene to operate the power supply one by one. How to efficiently control the safety of small photovoltaic power generation equipment is particularly important. Therefore, the utility model proposes a safety auxiliary control device for small photovoltaic power generation equipment to solve the shortcomings of the prior art. Utility Model Content

[0003] In view of the above problems, the purpose of the utility model is to provide a safety auxiliary control device for small photovoltaic power generation equipment. By setting up auxiliary control components, the output frequency of the photovoltaic power generation components can be monitored and controlled, thereby maintaining the stable operation of the power grid. The Hall effect sensor can monitor the magnetic field changes of the power grid system to determine the state of the power grid system and whether the photovoltaic power generation components are in island operation. In conjunction with the alarm component, communication module and remote auxiliary control module, the power supply of the photovoltaic power generation components can be realized when it is turned on and off.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A safety auxiliary control device for small photovoltaic power generation equipment comprises an auxiliary control box, an auxiliary control component, a Hall effect sensor, an alarm component and a remote auxiliary control module. The auxiliary control box is detachably mounted on the top of an inverter box connected to the photovoltaic power generation component. The auxiliary control component is arranged inside the auxiliary control box. The auxiliary control component comprises a controller, a current sensor, a voltage sensor, a temperature sensor, a communication module and a main control chip. The current sensor, the voltage sensor and the temperature sensor are connected to an inverter body inside the inverter box and to the main control chip. The main control chip is connected to the communication module and the controller. The Hall effect sensor is installed in a power grid system, and the Hall effect sensor communicates with the main control chip. The alarm component comprises a sound alarm and a light alarm. Both the sound alarm and the light alarm are arranged on the top of the auxiliary control box. The controller is connected to the sound alarm and the light alarm. The remote auxiliary control module is connected to the communication module. The remote auxiliary control module is used to remotely control the on and off of the photovoltaic power generation component.

[0006] Further improvements are: the auxiliary control box includes a box body and a base, fixing bolts are provided on both sides of the base, the base is installed with the two side walls of the upper end of the inverter box through fixing bolts, a box body is provided above the base, the auxiliary control assembly is arranged inside the box body, and heat dissipation windows are provided on the side walls and bottom of the box body.

[0007] A further improvement is that a support plate is provided at the bottom of the base, and the support plates are provided in multiple groups, and heat dissipation channels are formed between adjacent support plates.

[0008] A further improvement is that the main control chip receives the collected data from the current sensor, the voltage sensor and the temperature sensor, analyzes the output frequency change of the photovoltaic power generation component and controls the output frequency of the photovoltaic power generation component.

[0009] A further improvement is that the Hall effect sensor monitors the magnetic field changes of the power grid system to determine the on / off status of the power grid system, and the Hall effect sensor monitoring results are transmitted to the main control chip in real time.

[0010] A further improvement is that after receiving the monitoring result of the Hall effect sensor, the main control chip controls the operation of the sound alarm and the light alarm through the controller, and the main control chip sends a control signal to the remote auxiliary control module through the communication module.

[0011] The beneficial effects of the utility model are as follows: the utility model can monitor and control the output frequency of the photovoltaic power generation component by setting the auxiliary control component, thereby maintaining the stable operation of the power grid, and the active frequency tracking effectively improves the adaptability of the photovoltaic power generation component to the power grid system, and ensures the stability and safety of the power grid system; by setting the Hall effect sensor, it can monitor the magnetic field changes of the power grid system to judge the state of the power grid system, the Hall effect sensor has higher sensitivity and reliability for magnetic field monitoring, can more accurately detect the power outage of the power grid system, and judge whether the photovoltaic power generation component is in island operation, and cooperate with the alarm component, communication module and remote auxiliary control module to realize the power supply of the photovoltaic power generation component when it is disconnected, so as to avoid the safety hazards caused by the island operation of the photovoltaic power generation component. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the internal structure of the auxiliary control box of the utility model.

[0014] Among them: 1. Auxiliary control box; 101. Box body; 102. Base; 103. Fixing bolts; 104. Heat dissipation window; 105. Support plate; 2. Hall effect sensor; 3. Remote auxiliary control module; 4. Photovoltaic power generation component; 5. Inverter box; 6. Controller; 7. Current sensor; 8. Voltage sensor; 9. Temperature sensor; 10. Communication module; 11. Main control chip; 12. Sound alarm; 13. Light alarm; 14. Power grid system. DETAILED DESCRIPTION

[0015] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with an embodiment. The embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.

[0016] according to Figure 1-2As shown, this embodiment proposes a safety auxiliary control device for a small photovoltaic power generation equipment, including an auxiliary control box 1, an auxiliary control component, a Hall effect sensor 2, an alarm component and a remote auxiliary control module 3. The auxiliary control box 1 is detachably installed on the top of an inverter box 5 connected to a photovoltaic power generation component 4. An auxiliary control component is arranged inside the auxiliary control box 1. The auxiliary control component includes a controller 6, a current sensor 7, a voltage sensor 8, a temperature sensor 9, a communication module 10 and a main control chip 11. The current sensor 7, the voltage sensor 8, and the temperature sensor 9 are connected to the inverter body inside the inverter box 5 and to the main control chip 11. The main control chip 11 is connected to the communication module 10. The communication module 10 is connected to the controller 6, the Hall effect sensor 2 is installed in the power grid system 14, and the Hall effect sensor 2 communicates with the main control chip 11, the alarm component includes a sound alarm 12 and a light alarm 13, and the sound alarm 12 and the light alarm 13 are both arranged on the top of the auxiliary control box 1, the controller 6 is connected to the sound alarm 12 and the light alarm 13, the remote auxiliary control module 3 is connected to the communication module 10, and the remote auxiliary control module 3 is used to remotely control the on and off of the photovoltaic power generation component 4. The remote auxiliary control module 3 of the utility model is a software system arranged in a mobile communication device (mobile phone, PC device).

[0017] When the safety auxiliary control device of the small photovoltaic power generation equipment of the utility model is in operation, the auxiliary control component composed of the controller 6, the current sensor 7, the voltage sensor 8, the temperature sensor 9, the communication module 10 and the main control chip 11 arranged inside the auxiliary control box 1 can monitor the current, voltage and temperature parameters of the photovoltaic power generation component 4 during operation. The output frequency of the photovoltaic power generation component 4 during operation can be calculated based on the above parameters. The calculated output frequency of the photovoltaic power generation component 4 during operation is compared with the set output frequency, and then the photovoltaic power generation component 4 is controlled in real time to supply power to the power grid system 14 at the set output frequency. The auxiliary control component 10 is installed in the power grid system 14. The Hall effect sensor 2 in the power grid system 14 can monitor the magnetic field in the power grid system 14, and judge whether the power grid system 14 is on or off through the magnetic field data. When no magnetic field data is detected, it means that the power grid system 14 is out of power. At this time, the main control chip 11 controls the sound alarm 12 and the light alarm 13 through the controller 6 to alarm, reminding the owner of the photovoltaic power generation component 4 to turn off the photovoltaic power generation component 4 and stop supplying power to the power grid system 14, so as to avoid safety hazards caused by the isolated operation of the photovoltaic power generation component 4. At the same time, the control information can be sent to the remote auxiliary control module 3 through the communication module 10, so that the owner of the photovoltaic power generation component 4 can control the on and off of the photovoltaic power generation component 4 through the remote auxiliary control module 3.

[0018] The auxiliary control box 1 includes a box body 101 and a base 102. The base 102 is provided with fixing bolts 103 on both sides. The base 102 is installed with the upper two side walls of the inverter box 5 through the fixing bolts 103. A box body 101 is provided above the base 102. The auxiliary control components are arranged inside the box body 101. The side walls and the bottom of the box body 101 are provided with heat dissipation windows 104. A support plate 105 is provided at the bottom of the base 102. The support plates 105 are provided in multiple groups, and a heat dissipation channel is formed between adjacent support plates 105. The auxiliary control box 1 of the utility model can be quickly installed with the inverter box 5, and the heat dissipation of the auxiliary control components installed inside the box body 101 during operation can be quickly dissipated by providing the heat dissipation windows 104 and multiple groups of support plates 105.

[0019] The main control chip 11 receives the collected data from the current sensor 7, the voltage sensor 8, and the temperature sensor 9, and then analyzes the output frequency change of the photovoltaic power generation component 4 and controls the output frequency of the photovoltaic power generation component 4. The Hall effect sensor 2 monitors the magnetic field change of the power grid system 14 to determine the on / off status of the power grid system 14, and the monitoring result of the Hall effect sensor 2 is transmitted to the main control chip 11 in real time. After receiving the monitoring result of the Hall effect sensor 2, the main control chip 11 controls the sound alarm 12 and the light alarm 13 to operate through the controller 6, and the main control chip 11 sends a control signal to the remote auxiliary control module 3 through the communication module 10. In traditional technologies, anti-islanding operation usually adopts voltage or current detection technology, but these technologies have certain limitations. The utility model uses the Hall effect sensor 2 to detect the magnetic field change to determine the state of the power grid system 14. This technology has higher sensitivity and reliability, can more accurately detect the power outage of the power grid, and provides a reliable basis for timely cutting off the power supply of the photovoltaic power generation component 4. At the same time, the main control chip 11 of the utility model is also equipped with a data processing module. The data processing module adopts BP neural network data cleaning technology. By processing and cleaning the data received by the main control chip 11, the quality and accuracy of the data are improved, which can effectively improve the auxiliary control effect of the safety auxiliary control device of the small photovoltaic power generation equipment of the utility model and ensure the stable operation of the photovoltaic power generation component 4.

[0020] The utility model can monitor and control the output frequency of the photovoltaic power generation component 4 by setting an auxiliary control component, thereby maintaining the stable operation of the power grid. The active frequency tracking effectively improves the adaptability of the photovoltaic power generation component 4 to the power grid system 14, and ensures the stability and safety of the power grid system 14. By setting the Hall effect sensor 2, the magnetic field change of the power grid system 14 can be monitored to determine the state of the power grid system 14. The Hall effect sensor 2 has higher sensitivity and reliability for magnetic field monitoring, and can more accurately detect the power outage of the power grid system 14 and determine whether the photovoltaic power generation component 4 is in an isolated operation. In conjunction with the alarm component, the communication module 10 and the remote auxiliary control module 3, the photovoltaic power generation component 4 can be powered in time to avoid safety hazards caused by the isolated operation of the photovoltaic power generation component 4

[0021] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A safety auxiliary control device for a small photovoltaic power generation equipment, characterized in that: The invention comprises an auxiliary control box (1), an auxiliary control component, a Hall effect sensor (2), an alarm component and a remote auxiliary control module (3); the auxiliary control box (1) is detachably mounted on the top of an inverter box (5) connected to a photovoltaic power generation component (4); an auxiliary control component is arranged inside the auxiliary control box (1); the auxiliary control component comprises a controller (6), a current sensor (7), a voltage sensor (8), a temperature sensor (9), a communication module (10) and a main control chip (11); the current sensor (7), the voltage sensor (8) and the temperature sensor (9) are connected to an inverter body inside the inverter box (5) and to the main control chip (11); the main control chip The chip (11) is connected to the communication module (10) and the controller (6); the Hall effect sensor (2) is installed in the power grid system (14), and the Hall effect sensor (2) communicates with the main control chip (11); the alarm component comprises a sound alarm (12) and a light alarm (13); the sound alarm (12) and the light alarm (13) are both arranged on the top of the auxiliary control box (1); the controller (6) is connected to the sound alarm (12) and the light alarm (13); the remote auxiliary control module (3) is connected to the communication module (10); and the remote auxiliary control module (3) is used to remotely control the on and off of the photovoltaic power generation component (4).

2. A safety auxiliary control device for a small photovoltaic power generation equipment according to claim 1, characterized in that: The auxiliary control box (1) comprises a box body (101) and a base (102), fixing bolts (103) are provided on both sides of the base (102), the base (102) is mounted on both side walls of the upper end of the inverter box (5) via the fixing bolts (103), a box body (101) is provided above the base (102), the auxiliary control assembly is arranged inside the box body (101), and heat dissipation windows (104) are provided on the side walls and the bottom of the box body (101).

3. A safety auxiliary control device for a small photovoltaic power generation equipment according to claim 2, characterized in that: A support plate (105) is provided at the bottom of the base (102), and a plurality of groups of the support plates (105) are provided, with heat dissipation channels formed between adjacent support plates (105).

4. A safety auxiliary control device for a small photovoltaic power generation equipment according to claim 1, characterized in that: The main control chip (11) receives the collected data from the current sensor (7), the voltage sensor (8) and the temperature sensor (9), analyzes the output frequency change of the photovoltaic power generation component (4) and controls the output frequency of the photovoltaic power generation component (4).

5. A safety auxiliary control device for a small photovoltaic power generation equipment according to claim 1, characterized in that: The Hall effect sensor (2) monitors the change in the magnetic field of the power grid system (14) to determine the on / off status of the power grid system (14), and the monitoring result of the Hall effect sensor (2) is transmitted to the main control chip (11) in real time.

6. A safety auxiliary control device for small photovoltaic power generation equipment according to claim 5, characterized in that: After receiving the monitoring result of the Hall effect sensor (2), the main control chip (11) controls the operation of the sound alarm (12) and the light alarm (13) through the controller (6), and the main control chip (11) sends a control signal to the remote auxiliary control module (3) through the communication module (10).

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