Photovoltaic power generation energy storage device capable of effectively preventing fire spreading and implementation method

Abstract

The application discloses a photovoltaic power generation energy storage device and implementation method capable of effectively avoiding fire spreading, and belongs to the technical field of energy storage power supply. The application is provided with an energy storage structure and a fire extinguishing structure. The energy storage structure comprises energy storage batteries DC, an energy supply circuit and a detection circuit. The energy supply circuit can timely increase or decrease the working quantity of the energy storage batteries DC according to the size of the transformer load. The detection circuit can on-line detect the capacity of the energy storage batteries DC, thereby improving the utilization rate, stability and continuity of the energy storage batteries DC, and timely finding the energy storage batteries DC with low capacity. The energy storage batteries DC are stored in a dispersed manner. When a fire occurs in one of the energy storage batteries DC, the fire of the energy storage battery DC can be effectively extinguished through the fire extinguishing structure, thereby improving the safety of the energy storage batteries DC during work.

Description

Technical Field

[0001] This invention relates to a photovoltaic power generation and energy storage device and method for effectively preventing the spread of fire, belonging to the technical field of energy storage and power supply. Background Technology

[0002] Photovoltaic power generation is an emerging new energy power generation method. Photovoltaic power generation is divided into grid-connected photovoltaic power generation systems and off-grid photovoltaic power generation systems. In grid-connected photovoltaic power generation systems, the electricity generated by photovoltaic modules is directly input into the national power grid.

[0003] Off-grid photovoltaic (PV) power generation systems refer to independent power supply systems that are not connected to the national power grid. The electrical energy generated by PV modules needs to be stored in energy storage batteries for use at night or on cloudy days when sunlight is insufficient. Off-grid systems are typically used in remote areas or places where they cannot be connected to the national power grid. They rely on energy storage batteries to operate. Existing energy storage batteries are frequently charged and discharged, which gradually leads to aging and a decrease in capacity, affecting the continuity and stability of the power supply. Furthermore, energy storage batteries do not yet have the function of online capacity monitoring. At the same time, since energy storage batteries are stored in a centralized manner, they may be destroyed in the event of a fire. In winter, the low temperature may affect the activity of ions inside the energy storage batteries, affecting their storage capacity. To address these issues, some people in the art have developed a PV power generation energy storage device and implementation method that effectively prevents the spread of fire, thus overcoming the problems mentioned in the background. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a photovoltaic power generation energy storage device and implementation method that effectively avoids the spread of fire, addressing the above-mentioned shortcomings. The present invention includes an energy storage structure and a fire protection structure. The energy storage structure includes a DC energy storage battery, a power supply circuit, and a detection circuit. The power supply circuit can adjust the number of DC energy storage batteries in a timely manner according to the load of the transformer. The detection circuit can detect the degree of attenuation of the DC energy storage battery online. The fire protection structure can effectively prevent the spread of fire from the DC energy storage battery, thereby improving the utilization rate and safety of the DC energy storage battery.

[0005] To solve the above technical problems, the present invention adopts the following technical solution:

[0006] A photovoltaic power generation and energy storage device that effectively prevents the spread of fire includes an energy storage structure and a fire protection structure. The energy storage structure includes a power distribution room, an energy supply circuit, and a detection circuit.

[0007] The power distribution room is equipped with a transformer. The fire protection structure includes a fire box containing a DC energy storage battery. The fire protection structure also includes a fire tank and a fire pump, which are located underground.

[0008] Furthermore, the three-phase input terminals of the transformer are respectively connected to photovoltaic phase A, photovoltaic phase B and photovoltaic phase C, and the three-phase output terminals of the transformer are respectively connected to load phase L1, load phase L2 and load phase L3. The surface of the transformer load phase L1 is equipped with transformer H1, the surface of the transformer load phase L2 is equipped with transformer H2, and the surface of the transformer load phase L3 is equipped with transformer H3.

[0009] Furthermore, the energy storage structure also includes a voltage regulator and an inverter. The input terminal of the voltage regulator is connected to photovoltaic phase A, photovoltaic phase B and photovoltaic phase C, the output terminal of the voltage regulator is connected to the energy storage battery DC, the input terminal of the inverter is connected to the energy storage battery DC, a power supply circuit is provided between the input terminal of the inverter and the energy storage battery DC, and the output terminal of the inverter is connected to the three-phase input terminal of the transformer.

[0010] Furthermore, the power supply circuit includes a transistor Q4. The base of transistor Q4 is connected to one end of resistor R11. The other end of resistor R11 is connected to one end of resistor R12 and a current signal I1+. The other end of resistor R12 is connected to ground. The collector of transistor Q4 is connected to a +5V power supply. The emitter of transistor Q4 is connected to one end of resistor R17. The other end of resistor R17 is connected to the collector of transistor Q5. The base of transistor Q5 is connected to one end of resistor R13. The other end of resistor R13 is connected to one end of resistor R14 and a current signal I2+. The other end of resistor R14 is connected to ground. The emitter of transistor Q5 is connected to one end of resistor R18. The other end of resistor R18 is connected to the collector of transistor Q6. The base of transistor Q6 is connected to one end of resistor R15. The other end of resistor R15 is connected to one end of resistor R16 and a current signal I3+. The other end of resistor R16 is connected to ground.

[0011] Furthermore, the emitter of transistor Q6 is connected to one end of resistor R1, the other end of resistor R1 is connected to one end of resistor R2 and the negative terminal of Zener diode D1, the positive terminal of Zener diode D1 is connected to one end of resistor R5, the other end of resistor R5 is connected to the base of transistor Q1, the collector of transistor Q1 is connected to a +36V power supply, the emitter of transistor Q1 is connected to one end of resistor R6 and pin 1 of solid-state relay K1, the other end of resistor R6 and pin 2 of solid-state relay K1 are connected to ground, pin 3 of solid-state relay K1 is connected to the positive terminal of energy storage battery DC3, pin 4 of solid-state relay K1 is connected to the positive terminal of current-limiting diode D4 and a detection circuit, and the negative terminal of diode D4 is connected to the positive terminal of inverter input.

[0012] Furthermore, the other end of resistor R2 is connected to the negative terminal of Zener diode D2 at one end of resistor R3. The positive terminal of Zener diode D2 is connected to one end of resistor R7. The other end of resistor R7 is connected to the base of transistor Q2. The collector of transistor Q2 is connected to a +36V power supply. The emitter of transistor Q2 is connected to one end of resistor R8 and pin 1 of solid-state relay K2. The other end of resistor R8 and pin 2 of solid-state relay K2 are connected to ground. Pin 3 of solid-state relay K2 is connected to the positive terminal of energy storage battery DC2. Pin 4 of solid-state relay K2 is connected to the positive terminal of current-limiting diode D5 and a detection circuit. The negative terminal of diode D5 is connected to the positive input terminal of inverter.

[0013] Furthermore, the other end of resistor R3 is connected to the negative terminal of Zener diode D3 at one end of resistor R4, and the other end of resistor R4 is connected to ground. The positive terminal of Zener diode D3 is connected to one end of resistor R9, and the other end of resistor R9 is connected to the base of transistor Q3. The collector of transistor Q3 is connected to a +36V power supply. The emitter of transistor Q3 is connected to one end of resistor R10 and pin 1 of solid-state relay K3. The other end of resistor R10 and pin 2 of solid-state relay K3 are connected to ground. Pin 3 of solid-state relay K3 is connected to the positive terminal of energy storage battery DC1. Pin 4 of solid-state relay K3 is connected to the positive terminal of current-limiting diode D6 and a detection circuit. The negative terminal of diode D6 is connected to the positive input terminal of inverter.

[0014] Furthermore, the detection circuit includes a chip U1, which is an integrated operational amplifier, model TLC27M2. Pin 2 of chip U1 is connected to one end of resistor R19 and one end of resistor R20. The other end of resistor R19 is connected to a +36V power supply, and the other end of resistor R20 is connected to ground. Pin 3 of chip U1 is connected to the positive terminal of current-limiting diode D6. Pin 8 of chip U1 is connected to a +5V power supply. Pin 4 of chip U1 is connected to ground. Pin 1 of chip U1 is connected to a power supply... One end of resistor R21 is connected to pin 2 of chip U2 and one end of capacitor C1. Chip U2 is an integrated operational amplifier, model TLC27M2. The other end of capacitor C1 is connected to pin 1 of chip U2 and pin 1 of buzzer BP. Pin 2 of buzzer BP is connected to ground. Pin 3 of chip U2 is connected to one end of resistor R22, and the other end of resistor R22 is connected to ground. Pin 8 of chip U2 is connected to the +5V power supply, and pin 4 of chip U2 is connected to ground.

[0015] Furthermore, the outer wall of the energy storage battery DC is in contact with the inner wall of the fire box. The bottom and surrounding walls of the fire box are hollow. The fire box has an opening at the top, and a cover is provided at the top opening. A smoke sensor and a temperature sensor are provided on the lower surface of the cover. A sprinkler valve is also provided on the inner wall of the fire box. An inlet pipe is also connected to the lower surface of the bottom of the fire box. An inlet valve is also provided on the inlet pipe at the bottom of the fire box. A return pipe is also connected to the outer surface of the fire box wall.

[0016] The upper part of the fire tank is connected to the return liquid pipeline, the lower part of the fire tank is connected to the fire pump inlet through a pipeline, and the fire pump outlet is connected to the liquid inlet pipeline.

[0017] Furthermore, a method for implementing a photovoltaic power generation and energy storage device to effectively prevent the spread of fire includes the following steps:

[0018] The process begins at step S100, and then steps S101 are executed.

[0019] Step S101: The fire pump starts and all inlet valves are opened; after completion, proceed to step S102.

[0020] Step S102: The temperature sensor determines whether the temperature inside the fire box has reached the set fire value; if yes, proceed to step S103; otherwise, proceed to step S101.

[0021] Step S103: The smoke sensor determines whether the smoke level in the fire extinguisher box has reached the set fire threshold; if yes, proceed to step S104; otherwise, proceed to step S101.

[0022] Step S104: Open the sprinkler valve of the corresponding fire-fighting box that is on fire, and close the liquid inlet valve of the other fire-fighting boxes; after completion, proceed to step S105.

[0023] Step S105: The temperature sensor determines whether the temperature inside the fire-fighting box has dropped to the set fire-fighting value; if yes, proceed to step S106; otherwise, proceed to step S104.

[0024] Step S106: The smoke sensor determines whether the smoke in the fire-fighting box has dropped to the set fire-fighting value; if yes, proceed to step S107; otherwise, proceed to step S104.

[0025] Step S107: Close the sprinkler valve of the corresponding fire-fighting box; after completion, proceed to step S108.

[0026] Step S108: Wait for the operator to handle the aftermath, then reset; after completion, proceed to step S101.

[0027] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0028] 1. The present invention includes an energy storage structure. Through the power supply circuit in the energy storage structure, the number of working DC batteries in the energy storage battery can be increased or decreased in a timely manner according to the size of the transformer load, avoiding frequent charging and discharging of the DC batteries. The detection circuit can detect the capacity of the DC batteries online when they are discharging, which improves the utilization rate, stability and continuity of the DC batteries and can detect low capacity DC batteries in a timely manner.

[0029] 2. The present invention includes a fire-fighting structure. The present invention disperses the energy storage batteries DC and when a fire occurs in one of the energy storage batteries DC, the fire-fighting structure can effectively extinguish the fire. When the ambient temperature is low, the fire-fighting structure can also keep the energy storage batteries DC warm, thereby improving the safety of the energy storage batteries DC during operation. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to actual scale and orientation.

[0031] Figure 1 This is a schematic diagram of the structural connection of the present invention;

[0032] Figure 2 The power supply circuit connection principle of this invention Figure 1 ;

[0033] Figure 3 The power supply circuit connection principle of this invention Figure 2 ;

[0034] Figure 4 This is a schematic diagram of the detection circuit connection of the present invention;

[0035] Figure 5 A flowchart illustrating a method for implementing a photovoltaic power generation and energy storage device to effectively prevent the spread of fire.

[0036] Figure 1 In the middle: 1-Power distribution room, 2-Transformer, 3-Voltage stabilizer, 4-Inverter, 5-Fire box, 6-Inlet pipe, 7-Return pipe, 8-Inlet valve, 9-Box cover, 10-Sprinkler valve, 11-Smoke sensor, 12-Temperature sensor, 13-Fire tank, 14-Fire pump. Detailed Implementation

[0037] A photovoltaic power generation and energy storage device that effectively prevents the spread of fire includes an energy storage structure and a fire protection structure. The energy storage structure includes a power distribution room 1, a power supply circuit, and a detection circuit. The fire protection structure includes fire boxes 5, which are arranged in a uniform manner. Since each fire box 5 has the same structure and function, only one example is given below. The fire box 5 is equipped with a DC energy storage battery.

[0038] like Figure 1As shown, the power distribution room 1 is equipped with a transformer 2. The three-phase input terminals of the transformer 2 are respectively connected to photovoltaic phase A, photovoltaic phase B and photovoltaic phase C. Photovoltaic phase A, photovoltaic phase B and photovoltaic phase C are derived from the DC power inversion of the photovoltaic modules. The three-phase output terminals of the transformer 2 are respectively connected to load phase L1, load phase L2 and load phase L3. A current transformer H1 is installed on the surface of load phase L1 of the transformer 2, a current transformer H2 is installed on the surface of load phase L2 of the transformer 2, and a current transformer H3 is installed on the surface of load phase L3 of the transformer 2. The current transformer H1 is used to detect the current in load phase L1, the current transformer H2 is used to detect the current in load phase L2, and the current transformer H3 is used to detect the current in load phase L3.

[0039] The energy storage structure also includes a voltage regulator 3 and an inverter 4. The input terminal of the voltage regulator 3 is connected to photovoltaic phase A, photovoltaic phase B and photovoltaic phase C, and the output terminal of the voltage regulator 3 is connected to the energy storage battery DC. The voltage regulator 3 is used to regulate the DC power generated by the photovoltaic module and then charge the energy storage battery DC. The input terminal of the inverter 4 is connected to the energy storage battery DC. A power supply circuit is provided between the input terminal of the inverter 4 and the energy storage battery DC. The output terminal of the inverter 4 is connected to the three-phase input terminal of the transformer 2. The inverter 4 is used to invert the DC power in the energy storage battery DC into AC power and then supply it to the transformer 2 to supply power to the external load.

[0040] like Figure 2 and Figure 3 As shown, the power supply circuit includes a transistor Q4. The base of transistor Q4 is connected to one end of resistor R11. The other end of resistor R11 is connected to one end of resistor R12 and the current signal I1+. The other end of resistor R12 is connected to ground. The collector of transistor Q4 is connected to a +5V power supply. The emitter of transistor Q4 is connected to one end of resistor R17. The other end of resistor R17 is connected to the collector of transistor Q5. The base of transistor Q5 is connected to one end of resistor R13. The other end of resistor R13 is connected to one end of resistor R14 and the current signal I2+. The other end of resistor R14 is connected to ground. The emitter of transistor Q5 is connected to one end of resistor R18. The other end of resistor R18 is connected to the collector of transistor Q6. The base of transistor Q6 is connected to one end of resistor R15. The other end of resistor R15 is connected to one end of resistor R16 and the current signal I3+. The other end of resistor R16 is connected to ground.

[0041] The emitter of transistor Q6 is connected to one end of resistor R1. The other end of resistor R1 is connected to one end of resistor R2 and the negative terminal of Zener diode D1. The positive terminal of Zener diode D1 is connected to one end of resistor R5. The other end of resistor R5 is connected to the base of transistor Q1. The collector of transistor Q1 is connected to a +36V power supply. The emitter of transistor Q1 is connected to one end of resistor R6 and pin 1 of solid-state relay K1. The other end of resistor R6 and pin 2 of solid-state relay K1 are connected to ground. Pin 3 of solid-state relay K1 is connected to the positive terminal of energy storage battery DC3. Pin 4 of solid-state relay K1 is connected to the positive terminal of current-limiting diode D4 and a detection circuit. The negative terminal of diode D4 is connected to the positive input terminal of inverter.

[0042] The other end of resistor R2 is connected to the negative terminal of Zener diode D2 at one end of resistor R3. The positive terminal of Zener diode D2 is connected to one end of resistor R7. The other end of resistor R7 is connected to the base of transistor Q2. The collector of transistor Q2 is connected to a +36V power supply. The emitter of transistor Q2 is connected to one end of resistor R8 and pin 1 of solid-state relay K2. The other end of resistor R8 and pin 2 of solid-state relay K2 are connected to ground. Pin 3 of solid-state relay K2 is connected to the positive terminal of energy storage battery DC2. Pin 4 of solid-state relay K2 is connected to the positive terminal of current-limiting diode D5 and the detection circuit. The negative terminal of diode D5 is connected to the positive input terminal of inverter.

[0043] The other end of resistor R3 is connected to the negative terminal of Zener diode D3 at one end of resistor R4. The other end of resistor R4 is connected to ground. The positive terminal of Zener diode D3 is connected to one end of resistor R9. The other end of resistor R9 is connected to the base of transistor Q3. The collector of transistor Q3 is connected to the +36V power supply. The emitter of transistor Q3 is connected to one end of resistor R10 and pin 1 of solid-state relay K3. The other end of resistor R10 and pin 2 of solid-state relay K3 are connected to ground. Pin 3 of solid-state relay K3 is connected to the positive terminal of energy storage battery DC1. Pin 4 of solid-state relay K3 is connected to the positive terminal of current-limiting diode D6 and the detection circuit. The negative terminal of diode D6 is connected to the positive input terminal of inverter.

[0044] When it's nighttime or rainy, the photovoltaic modules stop working, and the transformer operates using the DC power from the energy storage battery. When transformers H1, H2, and H3 detect a gradual increase in the transformer's output currents, the output currents I1+ of transformer H1, I2+ of transformer H2, and I3+ of transformer H3 gradually increase. Consequently, the current flowing through resistors R11, R13, and R15 also gradually increases, and the current through transistor Q4 and transistor... As the base currents of transistors Q5 and Q6 increase, the amplified emitter currents of transistors Q4, Q5, and Q6 also gradually increase. The amplified emitter current flows into the ground line through resistors R1, R2, R3, and R4. Since transistors Q4, Q5, and Q6 are connected in series, any increase in the current in any phase of the transformer output will cause the amplified emitter currents of transistors Q4, Q5, and Q6 to increase.

[0045] When the voltage across resistor R4 is sufficient to break down Zener diode D3, transistor Q3 conducts, and current flows through its emitter. This causes solid-state relay K3 to conduct, connecting energy storage battery DC1 to the inverter. Energy in energy storage battery DC1 flows into the transformer via current-limiting diode D6. As the amplified current from the emitters of transistors Q4, Q5, and Q6 continues to increase, the voltage across resistor R3 gradually increases. Zener diode D2 breaks down, and transistor Q2 conducts, allowing current to flow through its emitter. This causes solid-state relay K2 to conduct, connecting energy storage battery DC2 to the inverter. Energy in energy storage battery DC2 flows into the transformer via current-limiting diode D5. Based on this working principle, the number of energy storage batteries (DC1) can be increased or decreased in real time according to the current at the transformer output.

[0046] like Figure 4As shown, there are multiple detection circuits. Since they have the same function and structure, only one is used as an example below. The detection circuit includes chip U1, which is an integrated operational amplifier, model TLC27M2. Pin 2 of chip U1 is connected to one end of resistor R19 and one end of resistor R20. The other end of resistor R19 is connected to a +36V power supply, and the other end of resistor R20 is connected to ground. Pin 3 of chip U1 is connected to the positive terminal of current-limiting diode D6. Pin 8 of chip U1 is connected to a +5V power supply, and pin 4 of chip U1 is connected to ground. The circuit is as follows: pin 1 of chip U1 is connected to one end of resistor R21, and the other end of resistor R21 is connected to pin 2 of chip U2 and one end of capacitor C1. Chip U2 is an integrated operational amplifier, model TLC27M2. The other end of capacitor C1 is connected to pin 1 of chip U2 and pin 1 of buzzer BP. Pin 2 of buzzer BP is connected to ground. Pin 3 of chip U2 is connected to one end of resistor R22, and the other end of resistor R22 is connected to ground. Pin 8 of chip U2 is connected to the +5V power supply, and pin 4 of chip U2 is connected to ground.

[0047] When solid-state relay K3 is turned on, the electrical energy in energy storage battery DC1 flows into the transformer through current-limiting diode D6. Pin 3 of chip U1 collects the positive voltage of energy storage battery DC1. Initially, the positive voltage of energy storage battery DC1 is relatively large, and the voltage at pin 3 of chip U1 is greater than the voltage at pin 2 of chip U1. Pin 1 of chip U1 outputs a high level, and the integrating circuit composed of chip U2 is turned on. As energy storage battery DC1 continues to discharge, the positive voltage of energy storage battery DC1 gradually decreases. When the value of the positive voltage of energy storage battery DC1 is less than the voltage at pin 2 of chip U1, pin 1 of chip U1 outputs a low level, and the integrating circuit composed of chip U2 is turned off. During this period, if pin 1 of chip U2 outputs a high level, the buzzer BP alarm will sound, indicating that the discharge time of energy storage battery DC1 is sufficient to turn on the integrating circuit composed of chip U2, proving that the storage capacity of energy storage battery DC1 is qualified. Otherwise, it proves that the storage capacity of energy storage battery DC1 is unqualified and needs to be replaced.

[0048] like Figure 1 As shown, the outer wall of the energy storage battery DC is in contact with the inner wall of the fire box 5. The bottom and surrounding walls of the fire box 5 are hollow. The fire box 5 has an opening at the top, and a cover 9 is provided at the opening. A smoke sensor 11 and a temperature sensor 12 are provided on the lower surface of the cover 9. A sprinkler valve 10 is also provided on the inner wall of the fire box 5. An inlet pipe 6 is also connected to the lower surface of the bottom of the fire box 5. An inlet valve 8 is also provided on the inlet pipe 6 at the bottom of the fire box 5. A return pipe 7 is also connected to the outer surface of the wall of the fire box 5.

[0049] The fire protection structure also includes a fire tank 13 and a fire pump 14. The fire tank 13 and the fire pump 14 are located underground. The upper part of the fire tank 13 is connected to the return liquid pipe 7, and the lower part of the fire tank 13 is connected to the inlet of the fire pump 14 through a pipe. The outlet of the fire pump 14 is connected to the inlet liquid pipe 6. The fire tank 13 contains liquid extinguishing agent. Normally, the liquid extinguishing agent in the fire tank 13 enters through the fire pump 14 and the inlet liquid pipe 6, enters through the hollow bottom of the fire box 5, and then flows back to the fire tank 13 through the return liquid pipe 7 on the outer surface of the fire box 5. Since the fire tank 13 is located underground, the temperature fluctuation of the liquid extinguishing agent inside is low, thus keeping the temperature inside the fire box 5 at a constant temperature. This ensures that the activity of the DC energy storage battery is not affected by temperature when the ambient temperature is low.

[0050] A method for implementing a photovoltaic power generation and energy storage device that effectively prevents the spread of fire is described below.

[0051] like Figure 5 As shown, the process begins at step S100, and the process starts by executing step S101.

[0052] Step S101: The fire pump starts and all inlet valves are opened; after completion, proceed to step S102.

[0053] Step S102: The temperature sensor determines whether the temperature inside the fire box has reached the set fire value; if yes, proceed to step S103; otherwise, proceed to step S101.

[0054] Step S103: The smoke sensor determines whether the smoke level in the fire extinguisher box has reached the set fire threshold; if yes, proceed to step S104; otherwise, proceed to step S101.

[0055] Step S104: Open the sprinkler valve of the corresponding fire-fighting box that is on fire, and close the liquid inlet valve of the other fire-fighting boxes; after completion, proceed to step S105.

[0056] Step S105: The temperature sensor determines whether the temperature inside the fire-fighting box has dropped to the set fire-fighting value; if yes, proceed to step S106; otherwise, proceed to step S104.

[0057] Step S106: The smoke sensor determines whether the smoke in the fire-fighting box has dropped to the set fire-fighting value; if yes, proceed to step S107; otherwise, proceed to step S104.

[0058] Step S107: Close the sprinkler valve of the corresponding fire-fighting box; after completion, proceed to step S108.

[0059] Step S108: Wait for the operator to handle the aftermath, then reset; after completion, proceed to step S101.

[0060] The description of this invention is provided for illustrative purposes and is not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A photovoltaic power generation and energy storage device capable of effectively preventing fire spread, characterized in that: Including energy storage structure and fire fighting structure, the energy storage structure includes power distribution room (1), energy supply circuit and detection circuit; The power distribution room (1) is provided with a transformer (2), the fire fighting structure includes a fire fighting box (5), the fire fighting box (5) is provided with an energy storage battery DC, and the fire fighting structure further includes a fire fighting tank (13) and a fire fighting pump (14), which are stored underground. The three-phase input end of the transformer (2) is respectively connected with photovoltaic A phase, photovoltaic B phase and photovoltaic C phase, the three-phase output end of the transformer (2) is respectively connected with load L1 phase, load L2 phase and load L3 phase, the surface of the load L1 phase of the transformer (2) is provided with a mutual inductor H1, the surface of the load L2 phase of the transformer (2) is provided with a mutual inductor H2, the surface of the load L3 phase of the transformer (2) is provided with a mutual inductor H3, the output of the mutual inductor H1 is a current signal I1+, the output of the mutual inductor H2 is a current signal I2+, and the output of the mutual inductor H3 is a current signal I3+. The energy storage structure further includes a voltage stabilizer (3) and an inverter (4), the input end of the voltage stabilizer (3) is connected with photovoltaic A phase, photovoltaic B phase and photovoltaic C phase, the output end of the voltage stabilizer (3) is connected with the energy storage battery DC, the input end of the inverter (4) is connected with the energy storage battery DC, the energy supply circuit is arranged between the input end of the inverter (4) and the energy storage battery DC, and the output end of the inverter (4) is connected with the three-phase input end of the transformer (2). The energy supply circuit includes a triode Q4, one end of a resistor R11 connected with the base of the triode Q4, one end of a resistor R12 connected with the other end of the resistor R11 and the current signal I1+, the other end of the resistor R12 connected with a ground wire, a power supply +5V connected with the collector of the triode Q4, one end of a resistor R17 connected with the emitter of the triode Q4, the collector of a triode Q5 connected with the other end of the resistor R17, one end of a resistor R13 connected with the base of the triode Q5, one end of a resistor R14 connected with the other end of the resistor R13 and the current signal I2+, the other end of the resistor R14 connected with a ground wire, one end of a resistor R18 connected with the collector of a triode Q6, one end of a resistor R15 connected with the base of the triode Q6, one end of a resistor R16 connected with the other end of the resistor R15 and the current signal I3+, and the other end of the resistor R16 connected with a ground wire.

2. The photovoltaic power generation and energy storage device capable of effectively preventing fire spreading according to claim 1, characterized in that: One end of a resistor R1 connected with the emitter of the triode Q6, one end of a resistor R2 connected with the other end of the resistor R1 and the negative electrode of a voltage stabilizing diode D1, one end of a resistor R5 connected with the positive electrode of the voltage stabilizing diode D1, the base of a triode Q1 connected with the other end of the resistor R5, a power supply +36V connected with the collector of the triode Q1, one end of a resistor R6 connected with the emitter of the triode Q1 and the 1 pin of a solid-state relay K1, a ground wire connected with the other end of the resistor R6 and the 2 pin of the solid-state relay K1, the positive electrode of an energy storage battery DC3 connected with the 3 pin of the solid-state relay K1, the positive electrode of a current-limiting diode D4 connected with the 4 pin of the solid-state relay K1 and a detection circuit, and the negative electrode of the diode D4 connected with the positive electrode of an inverter input.

3. The photovoltaic power generation and energy storage device capable of effectively preventing fire spreading according to claim 2, characterized in that: The other end of the resistor R2 is connected with the negative electrode of the resistor R3 and the negative electrode of the voltage stabilizing diode D2, the positive electrode of the voltage stabilizing diode D2 is connected with the one end of the resistor R7, the other end of the resistor R7 is connected with the base of the transistor Q2, the collector of the transistor Q2 is connected with the power supply +36V, the emitter of the transistor Q2 is connected with the one end of the resistor R8 and the 1 pin of the solid state relay K2, the other end of the resistor R8 and the 2 pin of the solid state relay K2 are connected with the ground wire, the 3 pin of the solid state relay K2 is connected with the positive electrode of the energy storage battery DC2, the 4 pin of the solid state relay K2 is connected with the positive electrode of the current limiting diode D5 and the detection circuit, the negative electrode of the diode D5 is connected with the positive electrode of the inverter input.

4. The photovoltaic power generation and energy storage device capable of effectively preventing fire spreading according to claim 3, characterized in that: The other end of the resistor R3 is connected with the one end of the resistor R4 and the negative electrode of the voltage stabilizing diode D3, the other end of the resistor R4 is connected with the ground wire, the positive electrode of the voltage stabilizing diode D3 is connected with the one end of the resistor R9, the other end of the resistor R9 is connected with the base of the transistor Q3, the collector of the transistor Q3 is connected with the power supply +36V, the emitter of the transistor Q3 is connected with the one end of the resistor R10 and the 1 pin of the solid state relay K3, the other end of the resistor R10 and the 2 pin of the solid state relay K3 are connected with the ground wire, the 3 pin of the solid state relay K3 is connected with the positive electrode of the energy storage battery DC1, the 4 pin of the solid state relay K3 is connected with the positive electrode of the current limiting diode D6 and the detection circuit, the negative electrode of the diode D6 is connected with the positive electrode of the inverter input.

5. The photovoltaic power generation and energy storage device capable of effectively preventing fire spreading according to claim 4, characterized in that: The detection circuit comprises a chip U1, the chip U1 is an integrated operational amplifier, the model of the chip U1 is TLC27M2, the 2 pin of the chip U1 is connected with the one end of the resistor R19 and the one end of the resistor R20, the other end of the resistor R19 is connected with the power supply +36V, the other end of the resistor R20 is connected with the ground wire, the 3 pin of the chip U1 is connected with the positive electrode of the current limiting diode D6, the 8 pin of the chip U1 is connected with the power supply +5V, the 4 pin of the chip U1 is connected with the ground wire, the 1 pin of the chip U1 is connected with the one end of the resistor R21, the other end of the resistor R21 is connected with the 2 pin of the chip U2 and the one end of the capacitor C1, the chip U2 is an integrated operational amplifier, the model of the chip U2 is TLC27M2, the other end of the capacitor C1 is connected with the 1 pin of the chip U2 and the 1 pin of the buzzer BP, the 2 pin of the buzzer BP is connected with the ground wire, the 3 pin of the chip U2 is connected with the one end of the resistor R22, the other end of the resistor R22 is connected with the ground wire, the 8 pin of the chip U2 is connected with the power supply +5V, the 4 pin of the chip U2 is connected with the ground wire.

6. The photovoltaic power generation and energy storage device capable of effectively preventing fire spreading according to claim 5, characterized in that: The outer wall of the energy storage battery DC is in contact with the inner wall of the fire-fighting box (5), the bottom and the surrounding wall of the fire-fighting box (5) are hollow, the upper portion of the fire-fighting box (5) is open, the upper portion of the fire-fighting box (5) is provided with a box cover (9), the lower surface of the box cover (9) is provided with a smoke sensor (11) and a temperature sensor (12), the opposite inner wall of the fire-fighting box (5) is further provided with a spray valve (10), the lower surface of the bottom of the fire-fighting box (5) is further connected with a liquid inlet pipeline (6), the liquid inlet pipeline (6) on the bottom of the fire-fighting box (5) is further provided with a liquid inlet valve (8), and the outer surface of the wall of the fire-fighting box (5) is further connected with a liquid return pipeline (7). The upper part of the fire-fighting tank (13) is communicated with the liquid return pipeline (7), the lower part of the fire-fighting tank (13) is communicated with the inlet of the fire-fighting pump (14) through a pipeline, and the outlet of the fire-fighting pump (14) is communicated with the liquid inlet pipeline (6).

7. An implementation method of a photovoltaic power generation and energy storage device capable of effectively preventing fire spreading, characterized in that: The implementation method is applied to the photovoltaic power generation energy storage device of claim 6, and comprises the following steps: The flow starts from step S100, the flow starts, and step S101 is executed; Step S101, the fire pump is started, and all the liquid inlet valves are opened; after completion, step S102 is executed; Step S102, the temperature sensor judges whether the temperature in the fire-fighting tank reaches the set fire-fighting value; if yes, step S103 is executed; if not, step S101 is executed; Step S103, the smoke sensor judges whether the smoke in the fire-fighting tank reaches the set fire-fighting value; if yes, step S104 is executed; if not, step S101 is executed; Step S104, the spray valve of the corresponding fire-fighting tank is opened, and the liquid inlet valve of the remaining fire-fighting tank is closed; after completion, step S105 is executed; Step S105, the temperature sensor judges whether the temperature in the fire-fighting tank reaches the set fire-fighting value; if yes, step S106 is executed; if not, step S104 is executed; Step S106, the smoke sensor judges whether the smoke in the fire-fighting tank reaches the set fire-fighting value; if yes, step S107 is executed; if not, step S104 is executed; Step S107, the spray valve of the corresponding fire-fighting tank is closed; after completion, step S108 is executed; Step S108, waiting for the operator to handle, and then resetting; after completion, step S101 is executed.

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