A kind of harmonic suppression device for exceeding standard of electric energy of photovoltaic power station

Abstract

The utility model relates to fire safety technical field, and disclose a kind of electric energy harmonic of photovoltaic power station is excessive and is inhibited device, wherein the inhibited device is mainly cabinet, top integrated wireless unit is used for remote early warning, cabinet is built-in trigger assembly, carbon dioxide package is made of glass fiber reinforced epoxy resin and rubber, trigger assembly includes connecting pipe, assembly pipe, movement seat, touch rod and pressure sensor, through mechanical linkage trigger fire extinguishing mechanism, when photovoltaic power station causes equipment temperature to rise due to harmonic excessive, liquid carbon dioxide in carbon dioxide package expands by heat, push movement seat and move down along assembly pipe, touch rod triggers pressure sensor, sensor sends signal to make electromagnetic disk power off, lose magnetic force adsorption and drive hammer nail to smash carbon dioxide package outer layer and inner layer under the drive of coil spring under the action of poking plate, release low temperature, non-conductive carbon dioxide, rapidly cool down and protect electronic components, and simultaneously, wireless unit sends early warning to control center.

Description

Technical Field

[0001] This utility model relates to the field of fire safety technology, and in particular to a device for suppressing excessive electrical harmonics in photovoltaic power plants. Background Technology

[0002] With the continuous expansion and widespread application of photovoltaic power plants, inverters, converters, and other power electronic equipment inevitably generate a large amount of harmonic currents during the process of converting direct current (DC) to alternating current (AC) and feeding it into the power grid. Harmonics not only degrade power quality and affect the safe and stable operation of the power grid, but also cause electrical equipment to overheat, accelerate insulation aging, and even lead to serious accidents such as fires. Statistics show that overheating of electrical equipment caused by harmonics has become one of the major contributing factors to fires in photovoltaic power plants.

[0003] Currently, existing solutions to the problem of excessive harmonics in photovoltaic power plants mainly focus on filtering technologies, such as passive filters and active power filters, to suppress harmonics. However, these solutions generally have limitations: on the one hand, passive filters are prone to resonance with the power grid and are not effective at suppressing broadband harmonics; on the other hand, while active power filters can dynamically compensate for harmonics, they are expensive, complex to maintain, and only address the harmonic problem without considering the secondary disasters that may be caused by excessive harmonics. Furthermore, existing fire protection systems in photovoltaic power plants are often independent of harmonic monitoring equipment. When harmonics cause equipment overheating and fire, they cannot respond immediately, posing a significant safety hazard. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the existing technology has the disadvantage that excessive harmonics may cause fire hazards. To this end, we propose a device for suppressing excessive electrical harmonics in photovoltaic power plants.

[0005] To achieve the above objectives, this application adopts the following technical solution: a device for suppressing excessive electrical harmonics in a photovoltaic power station, comprising a cabinet, a cabinet door hinged to the opening of the cabinet, a triggering component built into the cabinet, the triggering component comprising a carbon dioxide tank, a fixing frame sleeved on the surface of the carbon dioxide tank, the fixing frame fixedly connected to the inner wall of the cabinet at both ends, a connecting pipe fixedly connected to the bottom of the carbon dioxide tank, an assembly pipe fixedly connected to the bottom of the connecting pipe, a moving seat built into the assembly pipe, the moving seat slidably connected to the inner wall of the assembly pipe, a contact rod fixedly connected to the bottom of the moving seat, a pressure sensor provided at the bottom of the contact rod, an electromagnet mounted on the surface of the fixing frame, an assembly cylinder provided on the top of the electromagnet, one side of the assembly cylinder fixedly connected to the fixing frame, a rotating roller built into the assembly cylinder, the two ends of the rotating roller rotatably connected to the inner wall of the assembly cylinder, coil springs sleeved on both ends of the rotating roller, a toggle plate fixedly sleeved and connected to the surface of the rotating roller, one side of the toggle plate adsorbing and fixed to the electromagnet, and a hammer nail fixedly connected to the other side of the toggle plate.

[0006] Preferably, a heat dissipation unit is installed at the bottom of the cabinet.

[0007] Preferably, a wireless unit is installed on the top of the cabinet.

[0008] Preferably, the contact rod coincides with the axis of the pressure sensor.

[0009] Preferably, the output terminal of the pressure sensor is electrically connected to the control unit of the electromagnet and the input terminal of the wireless unit.

[0010] Preferably, the motion seat is fitted with a sealing ring around its perimeter.

[0011] Preferably, the pressure sensor is fixedly connected to a mounting base at its bottom, and one end of the mounting base is fixedly connected to the inner wall of the cabinet door.

[0012] Preferably, one end of the coil spring is fixedly connected to the inner wall of the assembly cylinder, and the other end of the coil spring is fixedly connected to the surface of the rotating roller.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] In this invention, the suppression device is based on a cabinet, with the cabinet door hinged to the opening. A heat dissipation unit at the bottom maintains stable internal temperature, and a wireless unit integrated at the top provides remote early warning. The cabinet houses a triggering assembly, the core of which is a carbon dioxide chamber made of fiberglass-reinforced epoxy resin and rubber, connected to the inner wall of the cabinet via a mounting bracket. The triggering assembly includes a connecting pipe, an assembly pipe, a motion seat, a contact rod, and a pressure sensor, triggering the fire extinguishing mechanism through mechanical linkage. An electromagnet, an assembly cylinder, a rotating roller, a coil spring, and a hammer pin form a chamber-breaking mechanism to ensure rapid release of carbon dioxide.

[0015] When the temperature of equipment in a photovoltaic power station rises due to excessive harmonics, the liquid carbon dioxide inside the carbon dioxide tank expands due to heat, pushing the moving seat down along the assembly tube. The contact rod triggers the pressure sensor. The sensor sends a signal to de-energize the electromagnet. The actuating plate, losing its magnetic attraction, is driven by a coil spring to drive the hammer nail to break the outer and inner layers of the carbon dioxide tank, releasing low-temperature, non-conductive carbon dioxide. This rapidly cools and extinguishes the fire while protecting electronic components. The wireless unit sends an early warning to the control center. This system overcomes the limitations of traditional fire protection systems that are independent of harmonic monitoring. It addresses the issue from the source of temperature anomalies, achieving proactive defense against secondary disasters caused by excessive harmonics, preventing the spread of fire and equipment damage. Through mechanical triggering, material innovation, and functional integration, the device fills the gap in existing harmonic suppression solutions for secondary disaster prevention and provides a low-cost, highly reliable solution for photovoltaic power stations. Attached Figure Description

[0016] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the cabinet of this utility model;

[0019] Figure 3 This is a schematic diagram of the trigger component structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the explosion structure of the trigger component of this utility model;

[0021] Figure 5 This is a second-view structural diagram of the trigger component explosion of this utility model.

[0022] Legend: 1. Cabinet; 101. Cabinet door; 102. Heat dissipation unit; 103. Wireless unit; 2. Trigger assembly; 201. Carbon dioxide tank; 202. Fixing frame; 203. Connecting pipe; 204. Assembly pipe; 205. Motion seat; 206. Sealing ring; 207. Contact rod; 208. Electromagnetic disk; 209. Pressure sensor; 210. Fixing seat; 211. Assembly cylinder; 212. Rotating roller; 213. Coil spring; 214. Actuating plate; 215. Hammer nail. Detailed Implementation

[0023] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0024] Reference Figures 1 to 5 As shown, this utility model provides a device for suppressing excessive electrical harmonics in a photovoltaic power station, including a cabinet 1. A cabinet door 101 is hinged to the opening of the cabinet 1. A heat dissipation unit 102 is installed at the bottom of the cabinet 1, and a wireless unit 103 is installed at the top of the cabinet 1. A triggering component 2 is built into the cabinet 1. The triggering component 2 includes a carbon dioxide bag 201. A fixing frame 202 is sleeved on the surface of the carbon dioxide bag 201. The two ends of the fixing frame 202 are fixedly connected to the inner wall of the cabinet 1. During the operation of the photovoltaic power station, when the excessive electrical harmonics cause the equipment temperature to rise, the suppression device will be activated. The liquid inside the carbon dioxide bag 201 is extremely sensitive to temperature. As the ambient temperature rises, the liquid inside the carbon dioxide bag 201 expands due to heat, generating outward pressure.

[0025] A connecting pipe 203 is fixedly connected to the bottom of the carbon dioxide tank 201. An assembly pipe 204 is fixedly connected to the bottom of the connecting pipe 203. A moving seat 205 is built into the assembly pipe 204 and is slidably connected to the inner wall of the assembly pipe 204. A sealing ring 206 is fitted around the moving seat 205. A contact rod 207 is fixedly connected to the bottom of the moving seat 205. A pressure sensor 209 is installed at the bottom of the contact rod 207. A fixed base 210 is fixedly connected to the bottom of the pressure sensor 209. One end of the fixed base 210 is fixedly connected to the inner wall of the cabinet door 101. Force pushes the moving seat 205, connected to the bottom of the carbon dioxide tank 201, downwards along the inner wall of the assembly pipe 204. The sealing rings 206 around the moving seat 205 ensure a tight seal during movement, preventing gas leakage. The contact rod 207, fixedly connected to the bottom of the moving seat 205, moves downwards synchronously. When the contact rod 207 contacts the pressure sensor 209 at the bottom and applies a certain pressure, the pressure sensor 209 is triggered.

[0026] An electromagnet 208 is mounted on the surface of the mounting frame 202. An assembly cylinder 211 is located on the top of the electromagnet 208. One side of the assembly cylinder 211 is fixedly connected to the mounting frame 202. A rotating roller 212 is built into the assembly cylinder 211. Both ends of the rotating roller 212 are rotatably connected to the inner wall of the assembly cylinder 211. Coil springs 213 are sleeved on both ends of the rotating roller 212. One end of the coil spring 213 is fixedly connected to the inner wall of the assembly cylinder 211, and the other end is fixedly connected to the surface of the rotating roller 212. A toggle plate 214 is fixedly connected to the surface of the rotating roller 212. One side of the toggle plate 214 is magnetically attached to the electromagnet 208, and the other side is fixedly connected to a hammer nail 215. When the pressure sensor 209 is triggered, it sends a power-off signal to the electromagnet 208. Before the electromagnet 208 is powered off, it is magnetically attached to the toggle plate 214, keeping it stationary. After the power is cut off, the actuating plate 214, no longer magnetically constrained, begins to move under the elastic force of the coil spring 213. One end of the coil spring 213 is fixed to the inner wall of the assembly cylinder 211, and the other end is connected to the rotating roller 212. The rotating roller 212 rotates under the drive of the coil spring 213, causing the actuating plate 214, which is fixed to its surface, to rotate around the rotating roller 212. The hammer nail 215, which is fixedly connected to the other side of the actuating plate 214, strikes the carbon dioxide bag 201 at a certain speed and force as the actuating plate 214 rotates.

[0027] Because the outer layer of the carbon dioxide tank 201 is made of glass fiber reinforced epoxy resin and the inner layer is made of rubber, it ruptures under the strong impact of the hammer 215, releasing the carbon dioxide inside rapidly. The released carbon dioxide, with its low-temperature heat absorption properties, quickly lowers the ambient temperature, alleviating the overheating of the equipment. Simultaneously, the non-conductive nature of carbon dioxide prevents additional damage to electronic components during fire extinguishing, effectively protecting the equipment. Furthermore, the wireless unit 103 installed on the top of cabinet 1 immediately sends a notification to the control center after the pressure sensor 209 is triggered, informing the photovoltaic power station that electrical harmonics have exceeded the standard and the carbon dioxide release fire extinguishing mechanism has been triggered.

[0028] Compared to traditional photovoltaic power plant fire protection systems, this device closely integrates harmonic monitoring with fire protection functions. If excessive harmonics cause abnormal temperatures, it can quickly release carbon dioxide to extinguish the fire, preventing its spread. Simultaneously, utilizing the unique properties of carbon dioxide, it effectively protects electronic components during firefighting, reducing the risk of equipment damage and minimizing economic losses.

[0029] Addressing the shortcomings of existing harmonic suppression solutions, this device takes a different approach. Passive filters are prone to resonance with the power grid and have poor suppression effects on broadband harmonics, while active power filters are costly and complex to maintain. This device, however, fills this gap and provides a more comprehensive solution by focusing on preventing secondary disasters caused by excessive harmonics.

[0030] Compared to active power filters, this device has a relatively simple structure, requiring no complex power electronic components or frequent maintenance, thus reducing equipment and operation costs. Simultaneously, the device achieves triggering through a combination of mechanical structure and sensors, ensuring high reliability and reducing the probability of failure. The inclusion of wireless unit 103 allows the control center to obtain information on harmonic exceedances and fire suppression in real time, facilitating rapid response from staff and enabling further intervention to prevent the escalation of disasters, thereby improving the safety and stability of the photovoltaic power station operation.

[0031] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A device for suppressing harmonic overruns of electric energy of a photovoltaic power plant, characterized in that, The device includes a cabinet with a hinged door at its opening. A triggering assembly is built into the cabinet, comprising a carbon dioxide chamber. A fixing frame is fitted onto the surface of the carbon dioxide chamber, with both ends of the fixing frame fixedly connected to the inner wall of the cabinet. A connecting pipe is fixedly connected to the bottom of the carbon dioxide chamber, and an assembly pipe is fixedly connected to the bottom of the connecting pipe. A motion seat is built into the assembly pipe and slidably connected to the inner wall of the assembly pipe. A contact rod is fixedly connected to the bottom of the motion seat, and a pressure sensor is installed at the bottom of the contact rod. An electromagnet is mounted on the surface of the fixing frame, and an assembly cylinder is mounted on top of the electromagnet. One side of the assembly cylinder is fixedly connected to the fixing frame, and a rotating roller is built into the assembly cylinder. Both ends of the rotating roller are rotatably connected to the inner wall of the assembly cylinder, and coil springs are fitted onto both ends of the rotating roller. A toggle plate is fixedly fitted onto the surface of the rotating roller, with one side of the toggle plate adsorbed and fixed to the electromagnet, and a hammer nail fixedly connected to the other side of the toggle plate.

2. The device for suppressing harmonic overruns of electric energy of a photovoltaic power station according to claim 1, characterized in that: A heat dissipation unit is installed at the bottom of the cabinet.

3. The device for suppressing harmonic overruns of electric energy of a photovoltaic power station according to claim 1, characterized in that: A wireless unit is installed on the top of the cabinet.

4. The device for suppressing harmonic overruns of electric energy of a photovoltaic power station according to claim 1, characterized in that: The contact rod is aligned with the axis of the pressure sensor.

5. The device for suppressing harmonic overruns of electric energy of a photovoltaic power station according to claim 1, characterized in that: The pressure sensor output is electrically connected to the control unit of the electromagnet and the input of the wireless unit.

6. The device for suppressing harmonic overruns of electric energy of a photovoltaic power station according to claim 1, characterized in that: The motion seat is fitted with sealing rings around its perimeter.

7. The device for suppressing harmonic overruns of electric energy of a photovoltaic power station according to claim 1, characterized in that: The pressure sensor is fixedly connected to a base at its bottom, and one end of the base is fixedly connected to the inner wall of the cabinet door.

8. The device for suppressing harmonic overruns of electric energy of a photovoltaic power station according to claim 1, characterized in that: One end of the coil spring is fixedly connected to the inner wall of the assembly cylinder, and the other end of the coil spring is fixedly connected to the surface of the rotating roller.

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