Distributed power supply grid-connected electric power engineering protection device

Abstract

The invention discloses a distributed power supply grid-connected electric power engineering protection device, which comprises a box body, a mounting guide rail, an anti-islanding protection unit, an electrical unit, a gas suppression unit and a heat dissipation assembly, and is characterized in that the mounting guide rail is fixedly mounted on the inner wall of the box body. Under the extremely high temperature condition, carbon dioxide gas is injected into the box body to rapidly restrain possible sparks, carbon dioxide is used as a fire extinguishing agent, and the oxygen content is reduced, so that the combustion process is prevented, and the fire risk is greatly reduced; once the temperature in the box body returns to normal and the carbon dioxide concentration reaches a safety level, the system can automatically recover to an initial state, so that the continuity and the stability of the whole system are ensured; carbon dioxide gas is prepared on site in a chemical reaction manner, so that effective recycling of resources is realized; carbon dioxide is generated by controlling the reaction between diluted hydrochloric acid and calcium carbonate, and is collected and recharged into the carbon dioxide high-pressure tank through the air pump.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power engineering, and in particular to a distributed power source grid-connected electric power engineering protection device. Background Art

[0002] With the rapid development of renewable energy technology, distributed power sources (such as solar photovoltaic, wind power, etc.) are increasingly used in power systems. Distributed power grid-connected power engineering protection devices are an important part of ensuring the stable operation of the power grid and the safety of equipment. However, the existing distributed power grid-connected power engineering protection devices have exposed some significant shortcomings in practical applications, especially their insufficient ability to suppress sparks, resulting in the risk of equipment burning, which not only affects the reliability of the system, but may also cause serious safety accidents.

[0003] The existing distributed power grid-connected power engineering protection devices are not well designed in terms of spark suppression. When the distributed power source is connected to the grid, due to factors such as voltage fluctuations and load mutations, instantaneous high voltage or current spikes may be generated. If these spikes are not effectively suppressed, it is easy to generate arcs or sparks at joints, switches and other parts. Existing protection devices often lack effective spark suppression mechanisms, resulting in arcs or sparks that cannot be extinguished in a short time. In this case, the arc or spark may ignite the surrounding insulation materials or cables, causing fires, equipment damage and economic losses.

[0004] Existing protection devices are deficient in fault detection and response speed. In distributed power grid-connected systems, faults often occur instantaneously, requiring protection devices to quickly detect abnormal conditions and take corresponding measures. However, existing protection devices are often not ideal in detection sensitivity and response speed, and are unable to cut off the power supply at the fault point in time, resulting in continued sparks and increased risk of combustion. Especially in high-power, high-voltage systems, the lag in fault response speed may lead to serious consequences.

[0005] Existing protection devices lack comprehensive consideration of spark suppression in their design. Many protection devices only focus on conventional protection functions such as overcurrent and overvoltage, while ignoring the importance of spark suppression. For example, although some protection devices are equipped with fuses or circuit breakers, these devices may generate arcs when cutting off the power supply, which in turn aggravates the spark problem. In addition, existing protection devices often do not fully consider the fireproof performance of the equipment during design, lack effective isolation and flame retardant measures, so that once sparks are generated, they can easily spread to other parts, causing a larger fire.

[0006] Existing protection devices are also insufficient in adapting to the complex and changing power grid environment. In a distributed power grid-connected system, the topology and operating status of the power grid may change, and existing protection devices often have difficulty adapting to these changes. For example, in the case of multiple power grids, the distribution of current and voltage becomes more complex, and existing protection devices may not be able to accurately determine the fault point, resulting in inaccurate or delayed protection action, increasing the risk of spark generation.

[0007] The existing protection devices need to be improved in terms of intelligence and automation. With the development of smart grid technology, protection devices need to have a higher level of intelligence, be able to monitor the state of the grid in real time, predict potential risks, and take active protective measures. However, the existing protection devices are still insufficient in data collection, analysis and decision support, and cannot achieve comprehensive intelligent protection, which increases the difficulty of spark suppression.

[0008] Therefore, how to provide a distributed power grid-connected power engineering protection device is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0009] One object of the present invention is to propose a distributed power grid-connected power engineering protection device. Under normal working conditions, the present invention can effectively promote air circulation inside the box through the cooperation of the opening and closing plate and the cooling fan, thereby reducing the temperature and ensuring that the electrical components operate within a suitable working temperature range; when the temperature of the device is too high, the system can automatically disconnect the power supply to reduce heat generation, and further reduce the temperature inside the box by starting the cooling fan, effectively preventing equipment damage caused by overheating; under extremely high temperature conditions, not only the power supply is cut off, but also the sparks that may appear are quickly suppressed by injecting carbon dioxide gas into the box, and carbon dioxide is used as a fire extinguishing agent to reduce the oxygen content, thereby preventing the occurrence of the combustion process and greatly reducing the risk of fire; once the temperature inside the box returns to normal and the carbon dioxide concentration reaches a safe level, the system can automatically return to the initial state, that is, reopen the necessary electrical components to ensure the continuity and stability of the entire system; the use of chemical reaction to prepare carbon dioxide gas on-site can not only quickly respond to the needs in emergency situations, but also realize the effective recycling of resources; by controlling the reaction between dilute hydrochloric acid and calcium carbonate (limestone or marble) to generate carbon dioxide, and collecting it back into the carbon dioxide high-pressure tank through an air pump, both cost saving and environmental protection and energy saving are achieved.

[0010] A distributed power grid-connected power engineering protection device according to an embodiment of the present invention comprises a box, a mounting rail, an anti-islanding protection unit, an electrical unit, a gas suppression unit and a heat dissipation assembly, wherein the mounting rail is fixedly mounted on the inner wall of the box, the anti-islanding protection unit is fixedly mounted on the mounting rail, the electrical unit is fixedly mounted on the mounting rail, the gas suppression unit is fixedly mounted on the top of the box, and the heat dissipation assembly is fixedly mounted on the top of the box;

[0011] The gas suppression unit includes a reaction tank, a carbon dioxide high-pressure tank, an actuator, a pressure sensor and a carbon dioxide sensor, wherein the bottom of the reaction tank is fixedly mounted on the top of the box, the bottom of the carbon dioxide high-pressure tank is fixedly mounted on the top of the box, the actuator is fixedly mounted on the reaction tank and the carbon dioxide high-pressure tank, the pressure sensor is fixedly mounted on the carbon dioxide high-pressure tank, and the carbon dioxide sensor is fixedly mounted on the inner wall of the box.

[0012] Furthermore, a stepping platform is fixedly provided at the bottom of the box, a door panel is rotatably provided at the front end of the box, a first hinge is fixedly provided at the front end of the box, and one end of the first hinge away from the box is fixedly mounted on the door panel.

[0013] Furthermore, a transparent plate is fixedly provided at the middle of the door panel, and a handle is fixedly provided at one end of the door panel away from the first hinge.

[0014] Further, the reaction tank is composed of an upper tank, a lower tank, a flange, a first baffle, a second baffle and a liquid storage cover, the upper tank is located directly above the lower tank, the bottom of the lower tank is fixedly mounted on the top of the box body, the flange is fixedly mounted on the opposite end of the upper tank and the lower tank, the first baffle is fixedly mounted on the inner top of the upper tank, the second baffle is fixedly mounted on the bottom of the upper tank, and the liquid storage cover is fixedly mounted on the top of the upper tank;

[0015] The area between the upper half tank and the first partition is a dilute hydrochloric acid solution area, the interior of the lower half tank is a chemical reaction area, and an ultrasonic generator is fixedly arranged on the inner bottom of the lower half tank.

[0016] Furthermore, the actuator assembly includes a liquid supply pump, a liquid inlet pipe, a liquid discharge pipe and a first electric valve, wherein the base of the liquid supply pump is fixedly mounted on the top of the second partition, the top of the liquid inlet pipe is fixedly mounted on the first partition, the bottom of the liquid inlet pipe is fixedly mounted on the liquid supply pump, the top of the liquid discharge pipe is fixedly mounted on the liquid supply pump, the bottom of the liquid discharge pipe passes through the second partition, and the first electric valve is fixedly mounted on the liquid inlet pipe.

[0017] Furthermore, the actuator also includes an air pump, an air intake pipe, an air outlet pipe, an air supply pipe and a second electric valve, wherein the bottom of the air pump is fixedly mounted on the second partition, the top of the air intake pipe is fixedly mounted on the air pump, the bottom of the air intake pipe passes through the second partition, one end of the air outlet pipe is fixedly mounted on the air pump, the other end of the air outlet pipe is fixedly mounted on the carbon dioxide high-pressure tank, the top of the air supply pipe is fixedly mounted on the carbon dioxide high-pressure tank, the bottom of the air supply pipe passes through the top of the box, and the second electric valve is fixedly mounted on the air supply pipe.

[0018] Furthermore, the heat dissipation assembly includes a heat dissipation tube and a heat dissipation fan. The top of the heat dissipation tube is fixedly installed on the inner top of the box body, and the heat dissipation fan is fixedly installed on the bottom of the heat dissipation tube.

[0019] Furthermore, the heat dissipation assembly also includes a heat dissipation motor, a second hinge and an opening and closing plate, wherein the bottom of the heat dissipation motor is fixedly mounted on the top of the box, the rotating shaft of the heat dissipation motor is fixedly mounted on the rotating shaft of the second hinge, and the two sides of the second hinge are respectively fixedly mounted on the top of the box and the opening and closing plate.

[0020] Furthermore, the heat dissipation assembly also includes a filter plate, and the filter plate is fixedly mounted on both sides of the box.

[0021] Furthermore, the heat dissipation assembly also includes a slide rail, a sealing plate and a telescopic rod, wherein the slide rail is fixedly mounted on both sides of the inner wall of the box, the two sides of the sealing plate are slidably mounted on the slide rail, the bottom of the support of the telescopic rod is fixedly mounted on both sides of the inner wall of the box, and the telescopic end of the telescopic rod is fixedly mounted on the sealing plate.

[0022] The beneficial effects of the present invention are:

[0023] Under normal working conditions, the invention can effectively promote air circulation inside the box through the cooperation of the opening and closing plate and the cooling fan, thereby reducing the temperature and ensuring that the electrical components operate within a suitable working temperature range; when the temperature of the device is too high, the system can automatically disconnect the power supply to reduce heat generation, and further reduce the temperature inside the box by starting the cooling fan, effectively preventing equipment damage caused by overheating; under extremely high temperature conditions, not only the power supply is cut off, but also possible sparks are quickly suppressed by injecting carbon dioxide gas into the box, and carbon dioxide is used as a fire extinguishing agent to reduce the oxygen content, thereby preventing the occurrence of the combustion process and greatly reducing the risk of fire; once the temperature inside the box returns to normal and the carbon dioxide concentration reaches a safe level, the system can automatically return to the initial state, that is, reopen the necessary electrical components to ensure the continuity and stability of the entire system; the use of chemical reaction to prepare carbon dioxide gas on-site can not only quickly respond to emergency needs, but also realize the effective recycling of resources; by controlling the reaction between dilute hydrochloric acid and calcium carbonate (limestone or marble) to generate carbon dioxide, and collecting it through an air pump and filling it back into a carbon dioxide high-pressure tank, it saves costs and is environmentally friendly and energy-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the overall structure of a distributed power grid-connected power engineering protection device proposed by the present invention;

[0026] Figure 2 A schematic diagram of the structure of a box of a distributed power grid-connected power engineering protection device proposed by the present invention;

[0027] Figure 3 A distributed power grid-connected power engineering protection device proposed by the present invention Figure 2 A magnified image of point A;

[0028] Figure 4 A distributed power grid-connected power engineering protection device proposed by the present invention Figure 2 Enlarged view of point B.

[0029] In the figure: 1. Box body; 1.1. Footrest; 1.2. Box door panel; 1.3. First hinge; 1.4. Transparent plate; 1.5. Handle; 2. Mounting rail; 3. Anti-islanding protection unit; 4. Electrical unit; 5. Gas suppression unit; 6. Heat dissipation assembly; 6.1. Heat dissipation tube; 6.2. Heat dissipation fan; 6.3. Heat dissipation motor; 6.4. Second hinge; 6.5. Opening and closing plate; 6.6. Filter plate; 6.7. Slide rail; 6.8. Sealing plate; 6.9. Telescopic rod; 7. Reactor; 7. 1. Upper tank; 7.2. Lower tank; 7.3. Flange; 7.4. First baffle; 7.5. Second baffle; 7.6. Liquid storage cover; 7.7. Ultrasonic generator; 8. Carbon dioxide high-pressure tank; 9. Actuator; 9.1. Liquid supply pump; 9.2. Liquid inlet pipe; 9.3. Liquid discharge pipe; 9.4. First electric valve; 9.5. Air pump; 9.6. Intake pipe; 9.7. Exit pipe; 9.8. Air supply pipe; 9.9. Second electric valve; 10. Pressure sensor; 11. Carbon dioxide sensor. DETAILED DESCRIPTION

[0030] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0031] Please refer to Figures 1 to 4 The present invention provides a distributed power grid-connected power engineering protection device, including a box 1, a mounting rail 2, an anti-islanding protection unit 3, an electrical unit 4, a gas suppression unit 5 and a heat dissipation component 6, wherein the mounting rail 2 is fixedly mounted on the inner wall of the box 1, the anti-islanding protection unit 3 is fixedly mounted on the mounting rail 2, the anti-islanding protection unit 3 is an anti-islanding protection device, the electrical unit 4 is fixedly mounted on the mounting rail 2, the electrical unit 4 includes a circuit breaker, a relay, an inverter and a surge protector, etc., the gas suppression unit 5 is fixedly mounted on the top of the box 1, the gas suppression unit 5 is used to produce and release carbon dioxide, the heat dissipation component 6 is fixedly mounted on the top of the box 1, and the mounting rail 2, the anti-islanding protection unit 3 and the electrical unit 4 are installed in the box 1. Electrical accessories are equipped with conventional accessories.

[0032] Specifically, a footrest 1.1 is fixedly provided at the bottom of the box body 1, a box door panel 1.2 is rotatably provided at the front end of the box body 1, a first hinge 1.3 is fixedly provided at the front end of the box body 1, an end of the first hinge 1.3 away from the box body 1 is fixedly installed on the box door panel 1.2, a transparent plate 1.4 is fixedly provided in the middle of the box door panel 1.2, and a handle 1.5 is fixedly provided at the end of the box door panel 1.2 away from the first hinge 1.3.

[0033] More specifically, the gas suppression unit 5 includes a reaction tank 7, a carbon dioxide high-pressure tank 8, an actuator 9, a pressure sensor 10 and a carbon dioxide sensor 11, wherein the bottom of the reaction tank 7 is fixedly mounted on the top of the box body 1, the bottom of the carbon dioxide high-pressure tank 8 is fixedly mounted on the top of the box body 1, the actuator 9 is fixedly mounted on the reaction tank 7 and the carbon dioxide high-pressure tank 8, the pressure sensor 10 is fixedly mounted on the carbon dioxide high-pressure tank 8, and the carbon dioxide sensor 11 is fixedly mounted on the inner wall of the box body 1.

[0034] More specifically, the reaction tank 7 is composed of an upper tank 7.1, a lower tank 7.2, a flange 7.3, a first baffle 7.4, a second baffle 7.5 and a liquid storage cover 7.6. The upper tank 7.1 is located directly above the lower tank 7.2, the bottom of the lower tank 7.2 is fixedly mounted on the top of the box body 1, the flange 7.3 is fixedly mounted on the opposite end of the upper tank 7.1 and the lower tank 7.2, the first baffle 7.4 is fixedly mounted on the inner top of the upper tank 7.1, the second baffle 7.5 is fixedly mounted on the bottom of the upper tank 7.1, the liquid storage cover 7.6 is fixedly mounted on the top of the upper tank 7.1, and the liquid storage cover 7.6 is fixedly mounted on the top of the upper tank 7.1. 6 can be opened to add dilute hydrochloric acid solution; between the upper half tank 7.1 and the first baffle 7.4 is a dilute hydrochloric acid solution area, in which dilute hydrochloric acid solution is added; the interior of the lower half tank 7.2 is a chemical reaction area, in which limestone or marble chips are stored; an ultrasonic generator 7.7 is fixedly provided at the inner bottom of the lower half tank 7.2, and the ultrasonic generator 7.7 uses ultrasonic waves to increase the contact area between the dilute hydrochloric acid solution and the limestone or marble chips, destroy the surface layer of the limestone or marble chips through cavitation, accelerate the reaction rate, and improve the purity of carbon dioxide.

[0035] More specifically, the actuator 9 includes a liquid supply pump 9.1, a liquid inlet pipe 9.2, a liquid discharge pipe 9.3 and a first electric valve 9.4, wherein the base of the liquid supply pump 9.1 is fixedly mounted on the top of the second partition 7.5, the top of the liquid inlet pipe 9.2 is fixedly mounted on the first partition 7.4, the bottom of the liquid inlet pipe 9.2 is fixedly mounted on the liquid supply pump 9.1, the top of the liquid discharge pipe 9.3 is fixedly mounted on the liquid supply pump 9.1, the bottom of the liquid discharge pipe 9.3 passes through the second partition 7.5, the first electric valve 9.4 is fixedly mounted on the liquid inlet pipe 9.2, and the actuator 9 also includes an air pump 9.5, an air suction pipe 9.6 , an air outlet pipe 9.7, an air supply pipe 9.8 and a second electric valve 9.9, wherein the bottom of the air pump 9.5 is fixedly mounted on the second partition 7.5, the top of the air intake pipe 9.6 is fixedly mounted on the air pump 9.5, the bottom of the air intake pipe 9.6 passes through the second partition 7.5, one end of the air outlet pipe 9.7 is fixedly mounted on the air pump 9.5, the other end of the air outlet pipe 9.7 is fixedly mounted on the carbon dioxide high-pressure tank 8, the top of the air supply pipe 9.8 is fixedly mounted on the carbon dioxide high-pressure tank 8, the bottom of the air supply pipe 9.8 passes through the top of the box body 1, and the second electric valve 9.9 is fixedly mounted on the air supply pipe 9.8.

[0036] More specifically, the heat dissipation assembly 6 includes a heat dissipation cylinder 6.1 and a heat dissipation fan 6.2, the top of the heat dissipation cylinder 6.1 is fixedly mounted on the inner top of the box body 1, the heat dissipation fan 6.2 is fixedly mounted on the bottom of the heat dissipation cylinder 6.1, and the heat dissipation fan 6.2 is used to dissipate the internal heat of the box body 1. The heat dissipation assembly 6 also includes a heat dissipation motor 6.3, a second hinge 6.4 and an opening and closing plate 6.5, wherein the bottom of the heat dissipation motor 6.3 is fixedly mounted on the top of the box body 1, the rotating shaft of the heat dissipation motor 6.3 is fixedly mounted on the rotating shaft of the second hinge 6.4, and the second hinge 6.4 is fixedly mounted on the rotating shaft of the second hinge 6.4. The two sides of the page 6.4 are respectively fixedly mounted on the box body 1 and the top of the opening and closing plate 6.5. The heat dissipation component 6 also includes a filter plate 6.6, which is fixedly mounted on both sides of the box body 1. The heat dissipation component 6 also includes a slide rail 6.7, a sealing plate 6.8 and a telescopic rod 6.9, wherein the slide rail 6.7 is fixedly mounted on both sides of the inner wall of the box body 1, and both sides of the sealing plate 6.8 are slidably mounted on the slide rail 6.7, the bottom of the support of the telescopic rod 6.9 is fixedly mounted on both sides of the inner wall of the box body 1, and the telescopic end of the telescopic rod 6.9 is fixedly mounted on the sealing plate 6.8.

[0037] Furthermore, when the present invention works normally, the opening and closing plate 6.5 is in an open state, the filter plate 6.6 and the sealing plate 6.8 are completely staggered, and the cooling fan 6.2 is turned off.

[0038] When the temperature of the device of the present invention is high, the cooling fan 6.2 is started to accelerate the air flow of the box body 1 to quickly reduce the internal temperature of the box body 1.

[0039] When the temperature of the device of the present invention is too high, the anti-islanding protection unit 3 and the electrical unit 4 are powered off, and then the telescopic rod 6.9 and the second electric valve 9.9 are started. The extension of the telescopic rod 6.9 drives the sealing plate 6.8 to move along the slide rail 6.7, and the filter plate 6.6 overlaps with the sealing plate 6.8, so that the filter plate 6.6 seals and blocks the filtering opening of the filter plate 6.6. The second electric valve 9.9 is opened, and the carbon dioxide high-pressure tank 8, the air supply pipe 9.8 and the box body 1 are connected. The carbon dioxide gas in the carbon dioxide high-pressure tank 8 flows into the box body 1 through the air supply pipe 9.8. When the carbon dioxide sensor 11 detects that the carbon dioxide gas reaches a certain concentration, the heat dissipation motor 6.3 is started again, and the rotating shaft of the heat dissipation motor 6.3 drives the opening and closing plate 6.5 to close the top heat dissipation port of the box body 1. The carbon dioxide high-pressure tank 8 continues to flow into the interior of the box body 1. The carbon dioxide gas inside the box body 1 suppresses the possibility of sparks in electrical accessories or cables, thereby avoiding the occurrence of fire.

[0040] After the carbon dioxide gas in the carbon dioxide high-pressure tank 8 is released, it is necessary to replenish the carbon dioxide gas.

[0041] Start the liquid supply pump 9.1 and the first electric valve 9.4, close the second electric valve 9.9, and let the dilute hydrochloric acid solution in the dilute hydrochloric acid solution area flow into the chemical reaction area through the liquid inlet pipe 9.2 and the liquid discharge pipe 9.3 of the liquid supply pump 9.1. The dilute hydrochloric acid solution reacts with the limestone or marble chips. The ultrasonic generator 7.7 uses ultrasonic waves to increase the contact area between the dilute hydrochloric acid solution and the limestone or marble chips, destroy the surface layer of the limestone or marble chips through cavitation, accelerate the reaction rate, and the purity of carbon dioxide, and can generate carbon dioxide gas faster.

[0042] The reaction of dilute hydrochloric acid solution with limestone or marble chips to produce carbon dioxide gas is a common chemical reaction equation:

[0043] CaCO 3 (s)+2HCl(aq)→CaCl 2 (aq)+H 2 O(l)+CO 2 (g)

[0044] The ultrasonic generator 7.7 can increase the contact area between the dilute hydrochloric acid solution and the limestone or marble chips, destroy the surface layer of the limestone or marble chips through cavitation, accelerate the reaction rate, and the purity of carbon dioxide, so as to accelerate the frequency of the chemical reaction, effectively ensure that the reactants fully produce carbon dioxide gas, thereby reducing the consumption of the reactants.

[0045] Start the air pump 9.5 and the second electric valve 9.9, and the carbon dioxide gas passes through the air pump 9.5, and enters the carbon dioxide high-pressure tank 8 from the intake pipe 9.6 and the outlet pipe 9.7 until the pressure sensor 10 detects that the internal gas of the carbon dioxide high-pressure tank 8 reaches a certain threshold. Then, turn off the liquid supply pump 9.1 and the first electric valve 9.4, and then turn off the air pump 9.5. The carbon dioxide high-pressure tank 8 is filled with carbon dioxide gas and can be continuously recycled.

[0046] The concentration of the dilute hydrochloric acid solution is maintained unchanged, and the dilute hydrochloric acid solution is continuously dripped into the limestone or marble chips for reaction until the pressure sensor 10 detects that the pressure in the carbon dioxide high-pressure tank 8 reaches the standard, and the dilute hydrochloric acid solution is stopped from dripping into the limestone or marble chips. The number of times the limestone or marble chips are used is set. After the number of times the limestone or marble chips are used reaches the standard, the limestone or marble chips are replaced and the dilute hydrochloric acid solution is added again to maintain normal operation.

[0047] Adopt integrated intelligent control system:

[0048] 1. System architecture:

[0049] 1.1 Data Acquisition Module

[0050] 1.2. Temperature sensor: monitors the temperature inside the box 1.

[0051] 1.3. Pressure sensor: monitors the pressure of the carbon dioxide high-pressure tank 8.

[0052] 1.4. Carbon dioxide sensor: monitors the carbon dioxide concentration inside the box 1.

[0053] 1.5. Equipment status sensor: monitors the operating status of the anti-islanding protection unit 3 and the electrical unit 4.

[0054] 1.6. Environmental sensor: monitors the temperature, humidity and other parameters of the external environment.

[0055] 2. Data transmission module

[0056] 2.1. Wireless communication module: Use wireless communication technologies such as Wi-Fi, LoRa, and NB-IoT to transmit sensor data to the central control unit.

[0057] 2.2. Wired communication module: Use wired communication technologies such as RS-485 and CAN bus to connect various subsystems.

[0058] 3. Central Control Unit

[0059] 3.1. Microprocessor: processes data from sensors and executes AI algorithms and logic control.

[0060] 3.2. Storage unit: stores historical data and configuration information.

[0061] 3.3 User Interface: Provide touch screen or remote access interface for monitoring and control.

[0062] 4. Execution module

[0063] 4.1、Cooling fan 6.2: Automatically start and stop according to temperature data.

[0064] 4.2. Electric valves 9.4 and 9.9: control the flow of liquid and gas.

[0065] 4.3, air pump 9.5: controls the charging and discharging of carbon dioxide gas.

[0066] 4.4. Ultrasonic generator 7.7: accelerates chemical reactions.

[0067] 4.5, heat dissipation motor 6.3: controls the switch of the opening and closing plate 6.5.

[0068] 4.6. Telescopic rod 6.9: controls the movement of sealing plate 6.8.

[0069] 5. Control method

[0070] 5.1 Temperature control

[0071] 5.1.1. Real-time monitoring: The temperature inside the box 1 is monitored in real time by a temperature sensor.

[0072] 5.2. Intelligent adjustment:

[0073] 5.2.1. When the temperature exceeds a preset threshold (eg, 35° C.), the cooling fan 6.2 is started to accelerate the air flow and reduce the temperature inside the box 1.

[0074] 5.2.2. When the temperature continues to rise and exceeds a higher threshold (eg 45°C), the heat dissipation motor 6.3 is started, the opening and closing plate 6.5 is closed, and the telescopic rod 6.9 is started at the same time, so that the sealing plate 6.8 closes the filter plate 6.6 to prevent the outside air from entering.

[0075] 5.2.3. Start the second electric valve 9.9 to release the carbon dioxide gas in the carbon dioxide high-pressure tank 8, which flows into the box body 1 through the gas supply pipe 9.8 to suppress potential fire risks.

[0076] 5.3. Equipment status monitoring

[0077] 5.3.1. Fault detection: The operating status of the anti-islanding protection unit 3 and the electrical unit 4 is monitored by the equipment status sensor, and faults are detected and alarmed in time.

[0078] 5.3.1. Preventive maintenance: Predict equipment maintenance cycles based on historical data and AI algorithms, perform maintenance in advance, and reduce downtime.

[0079] 5.4 Environmental Adaptation

[0080] 5.4.1. External environment monitoring: Monitor the temperature, humidity and other parameters of the external environment through environmental sensors and adjust the internal temperature control strategy.

[0081] 5.4.2. Dynamic adjustment: According to the changes in the external environment, the speed of the cooling fan 6.2 and the start and stop of the cooling motor 6.3 are dynamically adjusted to ensure that the temperature inside the box 1 is stable.

[0082] 5.5 Gas Management

[0083] 5.5.1. Carbon dioxide generation:

[0084] When the gas in the carbon dioxide high-pressure tank 8 is insufficient, the liquid supply pump 9.1 and the ultrasonic generator 7.7 are started to transport the dilute hydrochloric acid solution from the upper tank 7.1 to the lower tank 7.2 through the liquid inlet pipe 9.2 and the liquid discharge pipe 9.3 to react with the limestone or marble chips to generate carbon dioxide gas.

[0085] The ultrasonic generator 7.7 accelerates the reaction rate through cavitation and improves the purity of the carbon dioxide.

[0086] 5.5.2 Gas charging and discharging:

[0087] The charging and discharging of carbon dioxide gas is controlled by the air pump 9.5 and the second electric valve 9.9, and the generated carbon dioxide gas is sent into the carbon dioxide high-pressure tank 8 from the intake pipe 9.6 and the outlet pipe 9.7 until the pressure sensor 10 detects that the internal gas of the carbon dioxide high-pressure tank 8 reaches a preset threshold value (for example, 10MPa).

[0088] Close the liquid supply pump 9.1, the first electric valve 9.4, the air pump 9.5 and the second electric valve 9.9 to ensure that there is sufficient gas in the carbon dioxide high-pressure tank 8.

[0089] 6. User Interface

[0090] 6.1 Local User Interface

[0091] Touch screen: displays real-time data, alarm information and operation menu.

[0092] Buttons: Manually control key functions, such as starting the cooling fan 6.2 and the air pump 9.5.

[0093] 6.2 Remote User Interface

[0094] Web interface: Access the central control unit via a browser to view real-time data and historical records.

[0095] Mobile App: Remote monitoring and control via smartphone or tablet.

[0096] 7. Safety and protection

[0097] 7.1. Fault protection: When the system detects a fault, it automatically cuts off the power supply to prevent equipment damage.

[0098] 7.2. Safety monitoring: Real-time monitoring of carbon dioxide concentration and pressure to ensure safe operation.

[0099] 7.3. Log Recording: Record all operations and events to facilitate troubleshooting and maintenance.

[0100] 8. Specific control process

[0101] 8.1. Initialization:

[0102] After the system is powered on, the central control unit reads the initial configuration and starts self-testing of each sensor and actuator.

[0103] Set temperature, CO2 and pressure thresholds via the touch screen or remote user interface.

[0104] 8.2. Normal operation:

[0105] The central control unit collects data from temperature sensors, pressure sensors, carbon dioxide sensors and equipment status sensors in real time.

[0106] According to the temperature data, the cooling fan 6.2 is controlled to start and stop.

[0107] According to the equipment status data, the operating status of the anti-islanding protection unit 3 and the electrical unit 4 is monitored, and faults are discovered and alarmed in time.

[0108] 8.3. High temperature treatment:

[0109] When the temperature exceeds 35° C., the cooling fan 6.2 is started to accelerate the air flow.

[0110] When the temperature exceeds 45°C, the heat dissipation motor 6.3 is started, the opening and closing plate 6.5 is closed, the telescopic rod 6.9 is started, and the filter plate 6.6 is closed.

[0111] The second electric valve 9.9 is activated to release carbon dioxide gas to suppress potential fire risks.

[0112] 8.4 Gas Management:

[0113] When the gas in the carbon dioxide high-pressure tank 8 is insufficient, the liquid supply pump 9.1 and the ultrasonic generator 7.7 are started to generate carbon dioxide gas.

[0114] The filling and discharge of carbon dioxide gas is controlled by the air pump 9.5 and the second electric valve 9.9 to ensure that the gas in the carbon dioxide high-pressure tank 8 is sufficient.

[0115] 8.5. Troubleshooting:

[0116] When the system detects a fault, it automatically cuts off the power supply to prevent equipment damage.

[0117] Record fault information and issue an alarm through the user interface to prompt the user to perform maintenance.

[0118] Through the above control method, the intelligent management and control of the distributed power generation grid-connected power engineering protection device can be realized, and the reliability and safety of the system can be improved.

[0119] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A distributed power grid-connected power engineering protection device, characterized in that: The invention comprises a box (1), a mounting rail (2), an anti-islanding protection unit (3), an electrical unit (4), a gas suppression unit (5) and a heat dissipation assembly (6), wherein the mounting rail (2) is fixedly mounted on the inner wall of the box (1), the anti-islanding protection unit (3) is fixedly mounted on the mounting rail (2), the electrical unit (4) is fixedly mounted on the mounting rail (2), the gas suppression unit (5) is fixedly mounted on the top of the box (1), and the heat dissipation assembly (6) is fixedly mounted on the top of the box (1); The gas suppression unit (5) comprises a reaction tank (7), a carbon dioxide high-pressure tank (8), an actuator (9), a pressure sensor (10) and a carbon dioxide sensor (11), wherein the bottom of the reaction tank (7) is fixedly mounted on the top of the box (1), the bottom of the carbon dioxide high-pressure tank (8) is fixedly mounted on the top of the box (1), the actuator (9) is fixedly mounted on the reaction tank (7) and the carbon dioxide high-pressure tank (8), the pressure sensor (10) is fixedly mounted on the carbon dioxide high-pressure tank (8), and the carbon dioxide sensor (11) is fixedly mounted on the inner wall of the box (1).

2. A distributed power grid-connected power engineering protection device according to claim 1, characterized in that: A stepping platform (1.1) is fixedly arranged at the bottom of the box body (1), a box door panel (1.2) is rotatably arranged at the front end of the box body (1), a first hinge (1.3) is fixedly arranged at the front end of the box body (1), and an end of the first hinge (1.3) away from the box body (1) is fixedly mounted on the box door panel (1.2).

3. A distributed power grid-connected power engineering protection device according to claim 1, characterized in that: A transparent plate (1.4) is fixedly provided in the middle of the door panel (1.2), and a handle (1.5) is fixedly provided at one end of the door panel (1.2) away from the first hinge (1.3).

4. A distributed power grid-connected power engineering protection device according to claim 1, characterized in that: The reaction tank (7) is composed of an upper tank (7.1), a lower tank (7.2), a flange (7.3), a first baffle (7.4), a second baffle (7.5) and a liquid storage cover (7.6); the upper tank (7.1) is located directly above the lower tank (7.2); the bottom of the lower tank (7.2) is fixedly mounted on the top of the box body (1); the flange (7.3) is fixedly mounted on the opposite end of the upper tank (7.1) and the lower tank (7.2); the first baffle (7.4) is fixedly mounted on the inner top of the upper tank (7.1); the second baffle (7.5) is fixedly mounted on the bottom of the upper tank (7.1); and the liquid storage cover (7.6) is fixedly mounted on the top of the upper tank (7.1); The area between the upper tank (7.1) and the first partition (7.4) is a dilute hydrochloric acid solution area, the interior of the lower tank (7.2) is a chemical reaction area, and an ultrasonic generator (7.7) is fixedly arranged on the inner bottom of the lower tank (7.2).

5. A distributed power grid-connected power engineering protection device according to claim 1, characterized in that: The actuator assembly (9) comprises a liquid supply pump (9.1), a liquid inlet pipe (9.2), a liquid discharge pipe (9.3) and a first electric valve (9.4), wherein the base of the liquid supply pump (9.1) is fixedly mounted on the top of the second partition plate (7.5), the top of the liquid inlet pipe (9.2) is fixedly mounted on the first partition plate (7.4), the bottom of the liquid inlet pipe (9.2) is fixedly mounted on the liquid supply pump (9.1), the top of the liquid discharge pipe (9.3) is fixedly mounted on the liquid supply pump (9.1), the bottom of the liquid discharge pipe (9.3) passes through the second partition plate (7.5), and the first electric valve (9.4) is fixedly mounted on the liquid inlet pipe (9.2).

6. A distributed power grid-connected power engineering protection device according to claim 1, characterized in that: The actuator assembly (9) also includes an air pump (9.5), an air intake pipe (9.6), an air outlet pipe (9.7), an air supply pipe (9.8) and a second electric valve (9.9), wherein the bottom of the air pump (9.5) is fixedly mounted on the second partition plate (7.5), the top of the air intake pipe (9.6) is fixedly mounted on the air pump (9.5), the bottom of the air intake pipe (9.6) passes through the second partition plate (7.5), one end of the air outlet pipe (9.7) is fixedly mounted on the air pump (9.5), the other end of the air outlet pipe (9.7) is fixedly mounted on the carbon dioxide high-pressure tank (8), the top of the air supply pipe (9.8) is fixedly mounted on the carbon dioxide high-pressure tank (8), the bottom of the air supply pipe (9.8) passes through the top of the box body (1), and the second electric valve (9.9) is fixedly mounted on the air supply pipe (9.8).

7. A distributed power grid-connected power engineering protection device according to claim 1, characterized in that: The heat dissipation assembly (6) comprises a heat dissipation cylinder (6.1) and a heat dissipation fan (6.2); the top of the heat dissipation cylinder (6.1) is fixedly mounted on the inner top of the box body (1); and the heat dissipation fan (6.2) is fixedly mounted on the bottom of the heat dissipation cylinder (6.1).

8. A distributed power grid-connected power engineering protection device according to claim 1, characterized in that: The heat dissipation assembly (6) further comprises a heat dissipation motor (6.3), a second hinge (6.4) and an opening and closing plate (6.5), wherein the bottom of the heat dissipation motor (6.3) is fixedly mounted on the top of the box body (1), the rotating shaft of the heat dissipation motor (6.3) is fixedly mounted on the rotating shaft of the second hinge (6.4), and the two sides of the second hinge (6.4) are respectively fixedly mounted on the box body (1) and the top of the opening and closing plate (6.5).

9. A distributed power grid-connected power engineering protection device according to claim 1, characterized in that: The heat dissipation assembly (6) further comprises a filter plate (6.6), wherein the filter plate (6.6) is fixedly mounted on both sides of the box body (1).

10. A distributed power grid-connected power engineering protection device according to claim 1, characterized in that: The heat dissipation assembly (6) further comprises a slide rail (6.7), a sealing plate (6.8) and a telescopic rod (6.9), wherein the slide rail (6.7) is fixedly mounted on two sides of the inner wall of the box body (1), the two sides of the sealing plate (6.8) are slidably mounted on the slide rail (6.7), the bottom of the support of the telescopic rod (6.9) is fixedly mounted on two sides of the inner wall of the box body (1), and the telescopic end of the telescopic rod (6.9) is fixedly mounted on the sealing plate (6.8).

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