Photovoltaic module failure fire detection circuit

Abstract

The photovoltaic module fault fire-fighting detection circuit belongs to the technical field of photovoltaic modules, and particularly relates to a photovoltaic module fault fire-fighting detection circuit. The photovoltaic module fault fire-fighting detection circuit has good use effect. The photovoltaic module fault fire-fighting detection circuit comprises a temperature switch acquisition part, a current acquisition part, a voltage acquisition part and a temperature value acquisition part, wherein the acquisition signal output port of the temperature switch acquisition part, the acquisition signal output port of the current acquisition part, the acquisition signal output port of the voltage acquisition part and the acquisition signal output port of the temperature value acquisition part are connected with the acquisition signal input port of the main control part respectively, and the signal transmission port of the main control part is connected with the signal transmission port of the carrier communication part.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of photovoltaic modules, and particularly relates to a photovoltaic module fault fire-fighting detection circuit. BACKGROUND

[0002] The existing photovoltaic module shutdown device only monitors the voltage and current of the photovoltaic module, and directly controls a relay to perform shutdown operation to disconnect the photovoltaic module from other photovoltaic modules if a problem is found. With the gradual expansion of the use range of photovoltaic modules, the function of the photovoltaic module shutdown device has been further improved. To design a photovoltaic module shutdown device host with good use effect, a photovoltaic module fault fire-fighting detection circuit needs to be designed. SUMMARY

[0003] The application is aimed at the above problems, and provides a photovoltaic module fault fire-fighting detection circuit with good use effect.

[0004] To achieve the above object, the application adopts the following technical scheme. The photovoltaic module fault fire-fighting detection circuit comprises a temperature switch acquisition part, a current acquisition part, a voltage acquisition part and a temperature value acquisition part, wherein the acquisition signal output port of the temperature switch acquisition part, the acquisition signal output port of the current acquisition part, the acquisition signal output port of the voltage acquisition part and the acquisition signal output port of the temperature value acquisition part are connected to the acquisition signal input port of the main control part, and the signal transmission port of the main control part is connected to the signal transmission port of the carrier communication part.

[0005] As a preferred scheme, the temperature switch acquisition part comprises EL357NB chips U16-U19, a connector J5 and a B0524LS-1W module U17, wherein the 1-6 pins of J5 are connected to WQ_24V, WQ1, WQ_24V, WQ2, WQ_24V and WQ3, respectively.

[0006] The 1 pin of U16 is connected to one end of a resistor R31, one end of a resistor R33 and one end of a capacitor C71, the other end of R31 is connected to WQ1, the other end of R33 is connected to WQGND, the other end of C71 and the 2 pin of U16, the 3 pin of U16 is connected to GND, the 4 pin of U16 is connected to WQ_IN1 and one end of a resistor R32, the other end of R32 is connected to VCC.

[0007] The 1 pin of U18 is connected to one end of a resistor R34, one end of a resistor R36 and one end of a capacitor C74, the other end of R34 is connected to WQ2, the other end of R36 is connected to WQGND, the other end of C74 and the 2 pin of U18, the 3 pin of U18 is connected to GND, the 4 pin of U18 is connected to WQ_IN2 and one end of a resistor R35, the other end of R35 is connected to VCC.

[0008] The 1st pin of U19 is connected with one end of resistor R37, one end of resistor R39 and one end of capacitor C75 respectively, the other end of R37 is connected with WQ3, the other end of R39 is connected with WQGND, the other end of C75 and the 2nd pin of U19 respectively, the 3rd pin of U19 is connected with GND, the 4th pin of U19 is connected with WQ_IN3 and one end of resistor R38 respectively, the other end of R38 is connected with VCC;

[0009] The 1st pin of U17 is connected with one end of inductor L13, one end of capacitor C68 and one end of capacitor C69 respectively, the other end of L13 is connected with 5V, positive electrode of capacitor E6 and one end of capacitor C70 respectively, the negative electrode of E6 is connected with GND, the other end of C70, the other end of C68, the other end of C69 and the 2nd pin of U17 respectively, the 6th pin of U17 is connected with one end of capacitor C72, WQ_24V and positive electrode of capacitor E7 respectively, the 4th pin of U17 is connected with the other end of C72, WQGND, the negative electrode of E7 and one end of capacitor C73 respectively, the other end of C73 is connected with GND.

[0010] As another preferred scheme, the current collection part comprises F0305S-1W module U36, TLV2262 chip U38A, ADR291 chip U39, ADS8341 chip U40, H11L1 chip U41, ADUM1300 chip U42 and current transformer U43, the 1st pin of U36 is connected with one end of inductor L20, one end of capacitor C126 and positive electrode of capacitor E16 respectively, the other end of L20 is connected with VCC_3.3V and one end of capacitor C125 respectively, the other end of C125 is connected with GND, the other end of C126, the negative electrode of E16, the 2nd pin of U36 and one end of capacitor C133 respectively, the other end of C133 is connected with COM; the 6th pin of U36 is connected with one end of capacitor C124 and one end of inductor L21 respectively, the other end of C124 is connected with the 4th pin of U36 and one end of inductor L22 respectively, the other end of L21 is connected with one end of capacitor C127, positive electrode of capacitor E17, the 1st pin of S818-5 chip U37 and the 3rd pin of U37 respectively, the 2nd pin of U37 is connected with the other end of L22, the other end of C127, the negative electrode of E17, IGND, one end of capacitor C128, the negative electrode of capacitor E18, one end of capacitor C129, one end of capacitor C130, one end of capacitor C131 and one end of capacitor C132 respectively, the 5th pin of U37 is connected with I5V, the other end of C128, the positive electrode of E18, the other end of C129, the other end of C130, the other end of C131 and the other end of C132 respectively;

[0011] The 3-pin of U38A is connected with one end of capacitor C136, one end of resistor R56, the other end of C136 is connected with COM, the other end of R56 is connected with one end of capacitor C137, one end of resistor R55, one end of capacitor C134, the other end of C134 is connected with CH0, 1-pin of U38A, 2-pin of U38A, 8-pin of U38A is connected with one end of capacitor C52, I5V, one end of capacitor C135, the other end of C52 is connected with IGRID, the other end of C135 is connected with COM, one end of capacitor C139, the other end of C139 is connected with IGRID, 4-pin of U38A; the other end of R55 is connected with 3-pin of BAV199 tube D9, one end of resistor R57, one end of resistor R58, 2-pin of D9 is connected with I5V, 1-pin of D9 is connected with IGRID, the other end of R57 is connected with Iin0, the other end of R58 is connected with COM;

[0012] 1-4 pin of U43 is connected with I5V, IGRID, Iin0, COM respectively, 5-pin of U43 is connected with 1-pin of connector J12, 2-pin of J12 is connected with 6-pin of U43;

[0013] VCC_3.3V is connected with one end of capacitor C141, one end of capacitor C142, positive pole of capacitor E20 respectively, the other end of C141 is connected with the other end of C142, negative pole of E20, GND respectively;

[0014] 6-pin of U39 is connected with +2.5V, one end of capacitor C138 respectively, the other end of C138 is connected with IGRID, 2-pin of U39 is connected with I5V, 4-pin of U39 is connected with IGRID;

[0015] The 8 pins of U40 are connected with +2.5V, the positive pole of capacitor E21, and one end of capacitor C144 respectively, the other end of C144 is connected with the negative pole of E21 and IGND respectively, the 2, 3, and 6 pins of U40 are connected with CH0, CH1, and COM respectively, the 10 and 11 pins of U40 are connected with IGND, the 14 pin of U40 is connected with the 14 pin of ADUM1300 chip U42 and DIN respectively, the 15 pin of U40 is connected with the 13 pin of U42 and CS respectively, the 16 pin of U40 is connected with the 12 pin of U42 and CLK respectively, the 9, 10, 15, 16, 1-5, and 8 pins of U42 are connected with IGND, I5V, IGND, I5V, VCC_3.3V, GND, M_DIN1, M_CS1, M_CLK1, and GND respectively; the 12 pin of U40 is connected with the 2 pin of H11L1 module U41 through resistor R61, the 1 pin of U41 is connected with +5V, the 4 pin of U41 is connected with M_DOUT1 and one end of resistor R60 respectively, the other end of R60 is connected with the 6 pin of U41 and VCC_3.3V respectively, the 5 pin of U41 is connected with ground; the 7 pin of U40 is connected with one end of resistor R59, the positive pole of capacitor E19, and one end of capacitor C140 respectively, the other end of R59 is connected with +5V, the negative pole of E19 is connected with IGND and the other end of C140 respectively.

[0016] Secondly, the voltage acquisition part of the present application comprises F0305S-1W module U29, TLV2262 chip U31, ADR291 chip U32, connector J10, connector J11, AD7708 / 28 chip U34, H11L1 chip U33, and ADUM1300 chip U35, the 1 pin of U29 is connected with one end of inductor L17, one end of capacitor C102, and the positive pole of capacitor E12 respectively, the other end of L17 is connected with VCC_3.3V and one end of capacitor C101 respectively, the other end of C101 is connected with GND, the other end of C102, the negative pole of E12, the 2 pin of U29, and one end of capacitor C109 respectively, the other end of C109 is connected with VGND; the 6 pin of U29 is connected with one end of capacitor C100 and one end of inductor L18 respectively, the other end of C100 is connected with the 4 pin of U29 and one end of inductor L19 respectively, the other end of L18 is connected with one end of capacitor C103, the positive pole of capacitor E13, the 1 pin of S818-5 chip U30, and the 3 pin of U30 respectively, the 2 pin of U30 is connected with the other end of L19, the other end of C103, the negative pole of E13, VGND, one end of capacitor C104, the negative pole of capacitor E14, one end of capacitor C105, one end of capacitor C106, one end of capacitor C107, and one end of capacitor C108 respectively, the 5 pin of U30 is connected with +5V, the other end of C104, the positive pole of E14, the other end of C105, the other end of C106, the other end of C107, and the other end of C108 respectively;

[0017] The 3-pin of U31A is connected with one end of resistor R46 and one end of capacitor C112, the other end of C112 is connected with VGND, the other end of R46 is connected with one end of capacitor C113, one end of resistor R45 and one end of capacitor C111, the other end of C113 is connected with VGND; the other end of C111 is connected with the 1-pin of U31, AIN1 and the 2-pin of U31, the 8-pin of U31 is connected with V5V and one end of capacitor C110, the other end of C110 is connected with VGND, the 4-pin of U31 is connected with VGND; the other end of R45 is connected with the 3-pin of BAV199 tube D7, one end of resistor R47 and one end of resistor R48, the 2-pin of D7 is connected with V5V, the 1-pin of D7 is connected with VGND; the other end of R47 is connected with VIN1, the other end of R48 is connected with VGND;

[0018] The 5-pin of U31B is connected with one end of resistor R50 and one end of capacitor C118, the other end of C118 is connected with VGND, the other end of R50 is connected with one end of capacitor C119, one end of resistor R49 and one end of capacitor C115, the other end of C119 is connected with VGND; the other end of C115 is connected with the 7-pin of U31, AIN2 and the 6-pin of U31; the other end of R49 is connected with the 3-pin of BAV199 tube D8, one end of resistor R53 and one end of resistor R54, the 2-pin of D8 is connected with V5V, the 1-pin of D8 is connected with VGND; the other end of R53 is connected with VIN2, the other end of R54 is connected with VGND;

[0019] The 1-pin and 2-pin of J10 are connected with VIN1 and GND respectively, the 1-pin and 2-pin of J11 are connected with VIN2 and GND respectively;

[0020] The 6-pin of U32 is connected with +2.5V and one end of capacitor C114, the other end of C114 is connected with VGND, the 2-pin of U32 is connected with V5V, the 4-pin of U32 is connected with VGND;

[0021] The 5th pin of U34 is connected with VGND, negative pole of capacitor C123, and one end of capacitor C121, respectively, the other end of C121 is connected with +2.5V, positive pole of C123, and the 6th pin of U34, respectively; the 7th and 8th pins of U34 are connected with AIN1 and AIN2, respectively; the 12th pin of U34 is connected with VGND, the 25th pin of U34 is connected with the 17th pin of U34, the 4th pin of U34, one end of capacitor C51, and negative pole of capacitor E1, respectively, the positive pole of E1 is connected with the other end of C51, V5V, the 3rd pin of U34, and the 26th pin of U34, respectively, the 19th pin of U34 is connected with V5V through resistor R86, the 21st, 20th, 23rd, and 24th pins of U34 are connected with AD_SPI_CS, AD_SPI_CLK, AD_SPI_DOUT, and AD_SPI_DIN, respectively; the 27th pin of U34 is connected with one end of crystal X2 and one end of capacitor C122, respectively, the other end of C122 is connected with VGND and one end of capacitor C120, respectively, the other end of C120 is connected with the other end of X2 and the 28th pin of U34, respectively;

[0022] The 1st pin of U33 is connected with +5V, the 2nd pin of U33 is connected with AD_SPI_DOUT through resistor R52, the 4th pin of U33 is connected with M_DOUT and one end of resistor R51, respectively, the other end of R51 is connected with VCC_3.3V and the 6th pin of U33, respectively, the 5th pin of U33 is connected with GND;

[0023] The 9th pin of U35 is connected with VGND, the 10th pin of U35 is connected with V5V, the 12th to 16th pins of U35 are connected with AD_SPI_CLK, AD_SPI_CS, AD_SPI_DIN, VGND, and V5V, respectively; the 1st to 5th and 8th pins of U35 are connected with VCC_3.3V, GND, M_DIN, M_CS, M_CLK, and GND, respectively;

[0024] VCC_3.3V is connected with one end of capacitor C116, one end of capacitor C117, and positive pole of capacitor E15, respectively, the negative pole of E15 is connected with the other end of C116, the other end of C117, and GND, respectively.

[0025] In addition, the temperature value acquisition part of the present application comprises F0305S-1W module U20, AD8541 chip U22, AD8541 chip U25, AD8541 chip U26, AD8541 chip U27, ADR291 chip U24, ADUM1401 chip U23 and AD7124-4BBCPZ chip U28, the pin 1 of U20 is connected with one end of inductor L14, one end of capacitor C78 and the positive electrode of capacitor E8 respectively, the other end of L14 is connected with VCC_3.3V and one end of capacitor C77 respectively, the other end of C77 is connected with GND, the other end of C78, the negative electrode of E8, the pin 2 of U20 and one end of capacitor C81 respectively, the other end of C81 is connected with AIGND; the pin 6 of U20 is connected with one end of capacitor C76 and one end of inductor L15 respectively, the other end of C76 is connected with the pin 4 of U20 and one end of inductor L16 respectively, the other end of L15 is connected with one end of capacitor C79, the positive electrode of capacitor E9, the pin 1 of S818-3.3 chip U21 and the pin 3 of U21 respectively, the pin 2 of U21 is connected with the other end of L16, the other end of C79, the negative electrode of E9, AIGND and one end of capacitor C80 respectively, the pin 5 of U21 is connected with AIVCC and the other end of C80 respectively;

[0026] the pin 5 of U22 is connected with AIVCC and one end of capacitor C82 respectively, the other end of C82 is connected with AIGND, the pin 2 of U22 is connected with AIGND, the pin 1 of U22 is connected with the pin 4 of U22, AIN1 and one end of capacitor C84 respectively, the other end of C84 is connected with AIGND, the pin 3 of U22 is connected with one end of resistor R40 and one end of capacitor C83 respectively, the other end of C83 is connected with AIGND, the other end of R40 is connected with IOUT1 and the pin 1 of connector J6 respectively, the pin 2 of J6 is connected with AIGND;

[0027] the pin 5 of U25 is connected with AIVCC and one end of capacitor C85 respectively, the other end of C85 is connected with AIGND, the pin 2 of U25 is connected with AIGND, the pin 1 of U25 is connected with the pin 4 of U25, AIN2 and one end of capacitor C88 respectively, the other end of C88 is connected with AIGND, the pin 3 of U25 is connected with one end of resistor R41 and one end of capacitor C87 respectively, the other end of C87 is connected with AIGND, the other end of R41 is connected with IOUT2 and the pin 1 of connector J7 respectively, the pin 2 of J7 is connected with AIGND;

[0028] The 5th pin of U26 is connected with AIVCC and one end of capacitor C90 respectively, the other end of C90 is connected with AIGND, the 2nd pin of U26 is connected with AIGND, the 1st pin of U26 is connected with the 4th pin of U26, AIN3 and one end of capacitor C95 respectively, the other end of C95 is connected with AIGND, the 3rd pin of U26 is connected with one end of resistor R42 and one end of capacitor C93 respectively, the other end of C93 is connected with AIGND, the other end of R42 is connected with IOUT3 and the 1st pin of connector J8 respectively, the 2nd pin of J8 is connected with AIGND;

[0029] The 5th pin of U27 is connected with AIVCC and one end of capacitor C97 respectively, the other end of C97 is connected with AIGND, the 2nd pin of U27 is connected with AIGND, the 1st pin of U27 is connected with the 4th pin of U27, AIN4 and one end of capacitor C99 respectively, the other end of C99 is connected with AIGND, the 3rd pin of U27 is connected with one end of resistor R44 and one end of capacitor C98 respectively, the other end of C98 is connected with AIGND, the other end of R44 is connected with IOUT4 and the 1st pin of connector J9 respectively, the 2nd pin of J9 is connected with AIGND;

[0030] The 6th pin of U24 is connected with +2.5V and one end of capacitor C86 respectively, the other end of C86 is connected with AIGND, the 2nd pin of U24 is connected with R5V, the 4th pin of U24 is connected with AIGND;

[0031] The 1st-16th pins of U23 are connected with VCC_3.3V, GND, AI_DIN-2, AI_CLK-2, AI_CS-2, AI_DOUT-2, VCC_3.3V, GND, AIGND, AIVCC, AI_DOUT2, AI_CS2, AI_CLK2, AI_DIN2, AIGND, AIVCC respectively;

[0032] The 1st pin of U28 is connected with AIGND through capacitor C89, the 2nd pin of U28 is connected with AIVCC and one end of capacitor C91 respectively, the other end of C91 is connected with AIGND and the 3rd pin of U28 respectively; the 4th, 5th, 8th, 9th, 12th, 13th and 16th pins of U28 are connected with IOUT1, IOUT2, IOUT3, IOUT4, +2.5V, AIGND and AIN1 respectively; the 17th, 20th and 21st pins of U28 are connected with AIN2, AIN3 and AIN4 respectively; the 22nd pin of U28 is connected with the positive pole of capacitor E11 and one end of capacitor C96 respectively, the negative pole of E11 is connected with AIGND and the other end of C96 respectively, the 23rd pin of U28 is connected with AIGND and one end of capacitor C94 respectively, the other end of C94 is connected with the 24th pin of U28, the 25th pin of U28 is connected with AIGND, the 26th pin of U28 is connected with AIVCC, one end of resistor R43, the negative pole of capacitor E10 and one end of capacitor C92 respectively, the positive pole of E10 is connected with the other end of C92 and AIGND respectively, the other end of R43 is connected with the 27th pin of U28, the 28th, 29th, 31st and 32nd pins of U28 are connected with AI_DOUT2, AI_DIN2, AI_CLK2 and AI_CS2 respectively.

[0033] The present application has the beneficial effects.

[0034] The temperature switch collecting part and the temperature value collecting part of the photovoltaic module fault fire detection circuit are arranged, and the fire can be found in time through detecting the temperature.

[0035] The photovoltaic module fault fire detection circuit can detect the power generation of the photovoltaic panel through the current collecting part and the voltage collecting part, and the problems of the photovoltaic panel can be found in time.

[0036] The temperature switch collecting part and the temperature value collecting part of the photovoltaic module fault fire detection circuit can determine the fire together by detecting the temperature point value and the temperature change value, and the fire can be determined more accurately.

[0037] The main control part can send the related detection information to the monitoring center in time through the carrier wave communication part.

[0038] The carrier wave communication part can transmit data, that is, the data transmission is carried out through the power line, and the communication line does not need to be arranged separately, so that the structure is compact, and the utilization rate of the existing components is high. BRIEF DESCRIPTION OF DRAWINGS

[0039] The present application will be further described below in combination with the drawings and specific embodiments. The protection scope of the present application is not limited to the following content.

[0040] Figure 1 It is the circuit principle diagram of the current collecting part of the present application.

[0041] Figure 2 is the circuit schematic of the voltage acquisition part of the present application.

[0042] Figure 3 is the circuit schematic of the temperature value acquisition part of the present application.

[0043] Figure 4 is the circuit schematic of the main control part of the present application.

[0044] Figure 5 is the circuit schematic of the carrier communication part of the present application.

[0045] Figure 6 is the circuit schematic of the temperature switch acquisition part of the present application.

[0046] Figure 7 is the circuit schematic of the power supply part of the present application.

[0047] Figure 8 is the circuit schematic of the storage part of the present application.

[0048] Figure 9 is the circuit schematic of the charging part of the present application.

[0049] Figure 10 is the circuit schematic of the constant current part of the present application.

[0050] Figure 11 is the circuit schematic of the relay output part of the present application.

[0051] Figure 12 is the circuit schematic of the triode control part of the present application. DETAILED DESCRIPTION

[0052] As shown in the figure, the photovoltaic module fault fire detection circuit of the application can be applied to a photovoltaic module shutdown host, which comprises a power supply part, a storage part, a master control part, a carrier wave communication part, a temperature switch acquisition part, a charging part, a current acquisition part, a constant current part, a voltage acquisition part, a relay output part, a temperature value acquisition part and a triode control part, the power output port of the power supply part is connected with the power port of the storage part, the power port of the master control part, the power port of the carrier wave communication part, the power port of the temperature switch acquisition part, the power port of the charging part, the power port of the current acquisition part, the power port of the constant current part, the power port of the voltage acquisition part, the power port of the relay output part, the power port of the temperature value acquisition part and the power port of the triode control part respectively, the signal transmission port of the master control part is connected with the signal transmission port of the carrier wave communication part and the signal transmission port of the storage part respectively, the acquisition signal input port of the master control part is connected with the acquisition signal output port of the temperature switch acquisition part, the acquisition signal output port of the current acquisition part, the acquisition signal output port of the voltage acquisition part and the acquisition signal output port of the temperature value acquisition part respectively, and the control signal output port of the master control part is connected with the control signal input port of the constant current part, the control signal input port of the relay output part and the control signal input port of the triode control part respectively.

[0053] The photovoltaic module shutdown host of the application is provided with a relay output part, which can be used to start a fire extinguishing device, extinguish fire in time and reduce loss.

[0054] The photovoltaic module shutdown host of the application is provided with a triode control part, which can perform soft shutdown operation and prolong the working life of the device.

[0055] The power supply part comprises a TPS62040DGQ chip U6, an AMS1117-2.5 chip U7, a TPS62040DGQ chip U4, an RD5-110S05W chip U5 and a connector J1, the 1 pin of J1 is connected with PV+, and the 2 pin of J1 is connected with PV-.

[0056] The PV+ is connected to the VCC1, the VIN+ port of the BP48-24V chip, the positive pole of the capacitor C39, the negative pole of the diode D2, the one end of the capacitor C38 in sequence through the fuse F1 and the diode D1, the VIN- port of the BP48-24V chip is connected to the anode of the diode D2, the other end of the capacitor C38, the negative pole of the capacitor C39 and the PV- respectively, the VOUT+ port of the BP48-24V chip is connected to the cathode of the diode D10, +24V, the one end of the capacitor C36, the positive pole of the capacitor C37, the 1 pin of U5 in sequence through the diode D18, the 5 pin of U5 is connected to the 3 pin of U5, the negative pole of the capacitor C37, the other end of the capacitor C36, the VOUT port of the BP48-24V chip, the anode of the diode D19, the negative pole of the capacitor C143, the one end of the capacitor C145, GND respectively, the cathode of the diode D19 is connected to the 2 pin of U5 and the one end of the inductor L5 respectively, the other end of the inductor L5 is connected to the positive pole of the capacitor C143, the 4 pin of U5, the other end of the capacitor C145, +5V and the one end of the resistor R18 respectively, the other end of the resistor R18 is connected to GND through the power indicator lamp LED4;

[0057] The 2 pin of U6 is connected to the one end of the capacitor C41, the one end of the capacitor C42, 5V, the 3 pin of U6 and the 1 pin of U6 respectively, the 6 pin of U6 is connected to the 4 pin of U6, GND, the other end of the capacitor C41 and the other end of the capacitor C42 respectively, the 9, 10 and 11 pins of U6 are connected to GND, the 5 pin of U6 is connected to the one end of the resistor R19, the one end of the resistor R20, the one end of the capacitor C40 and the one end of the capacitor C44 respectively, the other end of the resistor R19 is connected to the one end of the inductor L2, the other end of the capacitor C40, the one end of the capacitor C43 and VCC_1.2V respectively, the other end of the inductor L2 is connected to the 7 and 8 pins of U6, the other end of the resistor R20 is connected to GND, the other end of the capacitor C44 and the other end of the capacitor C43 respectively;

[0058] The 2 pin of U4 is connected to the 3 pin of U4, the one end of the resistor R15, the one end of the capacitor C31, the one end of the capacitor C30 and 5V respectively, the 1 pin of U4 is connected to the other end of the resistor R15, the 6 pin of U4 is connected to the 4 pin of U4, GND, the other end of the capacitor C30 and the other end of the capacitor C31 respectively; the 9, 10 and 11 pins of U4 are connected to GND, the 5 pin of U4 is connected to the one end of the resistor R16, the one end of the resistor R17, the one end of the capacitor C32 and the one end of the capacitor C35 respectively, the other end of the resistor R16 is connected to the one end of the inductor L1, the other end of the capacitor C32, the one end of the capacitor C34, VCC_3.3V and the one end of the capacitor C33 respectively, the other end of the inductor L1 is connected to the 7 and 8 pins of U4, the other end of the resistor R17 is connected to GND, the other end of the capacitor C35, the other end of the capacitor C34 and the other end of the capacitor C33 respectively;

[0059] The 3 pins of U7 are connected with 5V, one end of capacitor C45, and one end of capacitor C46 respectively, the other end of C45 is connected with GND and the other end of C46 respectively, the 1 pin of U7 is connected with GND, the 2 and 4 pins of U7 are connected with one end of capacitor C47, one end of capacitor C48, and VCC_2.5V respectively, the other end of C47 is connected with the other end of C48 and GND respectively.

[0060] J1 is an external power input interface, S1 is an emergency stop switch, S1 is manually controlled, if a problem is found or needs to be repaired, closing S1 will power off the whole host. The function of the power supply part is to provide the required voltage for each part of the host, including VCC_1.2V, VCC_2.5V, VCC_3.3V, and 5V.

[0061] PV+ is the positive electrode of the photovoltaic panel, and PV- is the negative electrode of the photovoltaic panel. The voltage between PV+ and PV- is 48V, which is converted to 24V by BP48-24V. U5 converts 24V to 5V. BATIN connects the positive electrode of the battery, when the photovoltaic panel cannot provide the required power for the device, the battery continues to supply power.

[0062] U4, U6, and U7 are used to convert the required voltage.

[0063] The storage part uses FM24V02-GTR chip U3, the 1, 2, 3, and 4 pins of U3 are connected with GND, the 8 pin of U3 is connected with VCC_3.3V, the 7 pin of U3 is connected with WP and one end of resistor R12 respectively, the other end of R12 is connected with GND, the 6 pin of U3 is connected with SCL and one end of resistor R14 respectively, the other end of R14 is connected with VCC_3.3V and one end of resistor R13 respectively, the other end of R13 is connected with the 5 pin of U3 and SDA respectively, VCC_3.3V is connected with GND through capacitor C28, and VCC_3.3V is connected with GND through capacitor C29.

[0064] U3 is used to store the program of FPGA, and the program in U3 is called during the working process of FPGA.

[0065] Each time the device is powered off and powered on, the system returns to the factory state, the program (including the set value of temperature, the set value of power, and the control mode of triode, which is compared with the detected value to trigger relevant control, which will be explained later) is read out through U3, and the relevant circuit is controlled according to the program.

[0066] The master part includes FPGA_JTAG interface JP1, EPCS4SI8N chip U2 and EP4CE15E22I7 chip U1, pin 1 of JP1 is connected with FPGA_TCK and one end of resistor R1 respectively, the other end of R1 is connected with GND, pin 3 of JP1 is connected with FPGA_TDO, pin 5 of JP1 is connected with FPGA_TMS and one end of resistor R2 respectively, the other end of R2 is connected with VCCA and one end of resistor R3 respectively, the other end of R3 is connected with FPGA_TDI and pin 9 of JP1 respectively, pin 10 of JP1 is connected with GND, pin 4 of JP1 is connected with VCCA, pin 2 of JP1 is connected with GND;

[0067] Pin 15, 20, 16, 18, 94, 96, 97 and 21 of U1 are connected with FPGA_TDI, FPGA_TDO, FPGA_TCK, FPGA_TMS, VCCA, GND, VCCA and GND respectively, pin 12 of U1 is connected with FPGA_DCLK through resistor R4, pin 92 of U1 is connected with VCC_3.3V, one end of resistor R6 and one end of resistor R7 respectively, the other end of R6 is connected with pin 14 of U1, the other end of R7 is connected with pin 9 of U1, pin 23 of U1 is connected with CLK_48M, pin 30, 31 and 32 of U1 are connected with WP, SCL and SDA respectively;

[0068] Pin 1-8 of U2 are connected with FPGA_nCSO, FPGA_DATA0, VCC_3.3V, GND, FPGA_ASDO, FPGA_DCLK, VCC_3.3V and VCC_3.3V respectively, VCC_3.3V is connected with one end of capacitor C2 and one end of capacitor C3 respectively, the other end of C2 and the other end of C3 are connected with GND respectively, VCC_3.3V is connected with GND through capacitor C1, pin 4 of crystal oscillator X1 is connected with VCC_3.3V, pin 2 and pin 3 of X1 are connected with GND and CLK_48M respectively;

[0069] Pin 58-61 of U1 are connected with TXD1, RT1, RXD1 and WQ_IN1 respectively, pin 64, 65, 67-69 and 71 of U1 are connected with WQ_IN2, WQ_IN3, M_DOUT, M_CLK, M_CS and M_DIN respectively;

[0070] Pin 17, 26, 40, 47, 56, 62, 81, 93, 117, 122, 130 and 139 of U1 are connected with VCC_3.3V, pin 5, 29, 34, 38, 45, 70, 78, 84, 102, 116, 124 and 138 of U1 are connected with VCC_1.2V;

[0071] Pin 19, 27, 41, 48, 57, 63, 82, 95, 118, 123, 131, 140, 4, 22, 79, 145 of U1 are connected with GND;

[0072] Pin 13 of U1 is connected with FPGA_DATA0 through resistor R8, pin 8, 6 of U1 are connected with FPGA_nCS0, FPGA_ASD0 respectively;

[0073] Pin 77, 80, 83 of U1 are connected with M_DOUT1, M_CLK1, M_CS1 respectively;

[0074] Pin 98-101, 104, 105 of U1 are connected with AI_DIN-2, AI_CLK-2, AI_CS-2, AI_DOUT-2, DO1, DO2 respectively;

[0075] Pin 35, 107, 3, 75 of U1 are connected with VCCA, pin 37, 109, 1, 73 of U1 are connected with VCCD, pin 36, 108, 2, 74 of U1 are connected with GND;

[0076] VCC_1.2V is connected with one end of capacitor C8-C15 respectively, the other end of C8-C15 is connected with GND;

[0077] VCC_3.3V is connected with one end of capacitor C16-C21 respectively, the other end of C16-C21 is connected with GND;

[0078] VCC_3.3V is connected with one end of capacitor C22-C27 respectively, the other end of C22-C27 is connected with GND;

[0079] VCC_2.5V is connected with VCCA, one end of capacitor C4, one end of capacitor C5 through magnetic bead FB1 respectively, the other end of C4 is connected with the other end of C5 and GND respectively;

[0080] VCC_1.2V is connected with VCCD, one end of capacitor C6, one end of capacitor C7 through magnetic bead FB2 respectively, the other end of C6 is connected with the other end of C7 and GND respectively;

[0081] Pin 39, 43, 44, 50, 51 of U1 are connected with LED1, DO3, DO4, SDA1, SCL1 respectively;

[0082] Pin 135 of U1 is connected with VCC_3.3V through resistor R9 and LED1 successively, pin 136 of U1 is connected with VCC_3.3V through resistor R10 and LED2 successively, pin 137 of U1 is connected with VCC_3.3V through resistor R11 and LED3 successively.

[0083] The carrier communication part includes B0505LS-1W module U45, KQ-300 chip (KQ300 is a power carrier chip, TXD and RXD transmission and reception ports TTL level, the 5th pin of U49 is used for controlling signal receiving or transmitting. Then through the level conversion chip U47, it is converted into TXD1 and RXD1 and the main control part interacts information) U49, ADUM1301ARWZ chip U47 (U47 is a level conversion chip, converts the high level amplitude of the received signal into the low level amplitude that U1 can accept, and converts the low level amplitude of the signal sent by U1 into a high level amplitude signal that can be used for carrier communication) and connector P1, the 1st pin of U45 is connected with one end of inductor L23, one end of capacitor C149 and one end of capacitor C150 respectively, the other end of L23 is connected with 5V, positive electrode of capacitor E24 and one end of capacitor C151 respectively, the negative electrode of E24 is connected with GND, the other end of C151, the other end of C149, the other end of C150 and the 2nd pin of U45 respectively, the 6th pin of U45 is connected with one end of capacitor C152, ZB5V and positive electrode of capacitor E25 respectively, the 4th pin of U45 is connected with the other end of C152, ZBGND1, negative electrode of E25 and one end of capacitor C154 respectively, the other end of C154 is connected with GND;

[0084] The 1 foot of U49 is connected with the one end of resistor R69, the anode of diode D12 and the cathode of diode D15 through capacitor C159, the cathode of D12 is connected with ZB5V, the other end of R69 is connected with the one end of resistor R71 and the base of NPN transistor Q5, the collector of Q5 is connected with the one end of capacitor C158, the cathode of voltage stabilizing diode D14 and the one end of inductor L27, the other end of C158 is connected with the one end of resistor R73, the other end of L27 is connected with ZB5V and the one end of the primary side of transformer T33 through capacitor C155, the other end of the secondary side of T33 is connected with PV- through inductor L24, the other end of the primary side of T33 is connected with the one end of the secondary side of T33 and ZB5V, the other end of the secondary side of T33 is connected with the collector of NPN transistor Q4, the one end of capacitor C157 and the cathode of voltage stabilizing diode D13, the other end of C157 is connected with the one end of resistor R72, the base of Q4 is connected with the one end of resistor R68 and the one end of resistor R70, the other end of R68 is connected with the anode of diode D11, the cathode of diode D16 and the one end of capacitor C156, the cathode of D11 is connected with ZB5V, the anode of D16 is connected with the other end of R70, the emitter of Q4, the other end of R72, the anode of D13, ZBGND1, the anode of D14, the other end of R73, the emitter of Q5 and the other end of D15, the other end of C156 is connected with the 2 foot of U49, the 3 foot of U49 is connected with the 2 foot of 74LS04 chip U50A, the 1 foot of U50A is connected with the 3 foot of crystal oscillator Y1, the 4 foot of Y1 is connected with ZB5V, the 2 foot of Y1 is connected with ZBGND1, the 4-8 feet of U49 are connected with TXD, RT, ZBGND1, ZB5V and RXD respectively, the 9 foot of U49 is connected with ZBGND1 and the 10 foot of U49 through capacitor C164, the 11 foot of U49 is connected with the one end of inductor L32 and the one end of resistor R82, the other end of L32 is connected with the one end of the secondary side of transformer T43 through capacitor C167, the other end of the secondary side of T43 is connected with ZBGND1 and the other end of R82, the one end of the primary side of T43 is connected with PV+ through capacitor C166, the other end of the primary side of T43 is connected with PV- through capacitor C168.

[0085] The 1-5 feet of P1 are connected with RXD, RT, TXD, ZBVCC and ZBGND1 respectively.

[0086] The 1-5, 7-10 and 12-16 feet of U47 are connected with VCC_3.3V, GND, TXD1, RT1, RXD1, VCC_3.3V, GND, ZBGND1, ZBVCC, RXD, RT, TXD, ZBGND1 and ZBVCC respectively.

[0087] U1 sends photovoltaic panel power generation power detection information and alarm information to the gateway in the front end through the carrier communication interface when a fault or fire occurs, to notify the monitoring center.

[0088] Y1 is a crystal oscillator for a carrier chip. Y1 provides a clock signal to U49 through U50A.

[0089] The 1st and 2nd pins of U49 constitute a push-pull circuit, and a high-frequency wave is generated through T33. Q4 and Q5 are alternately turned on, and the two groups of primary sides of T33 are the same core. Q5 is turned on to generate a positive half wave, and Q4 is turned on to generate a negative half wave. In this way, alternating magnetic flux is generated, and the waveforms of the switching frequencies of Q5 and Q4 (U49 controls the opening and closing of Q5 and Q4) are transmitted to the secondary side of the transformer T33. The switching frequency signal is transmitted out through the bus, that is, the transmission of the communication signal is carried out through the power line. T43 serves as a demodulation part of the power carrier. T43 senses the communication signal on the bus and then sends it to U49 through C167 and L32.

[0090] The data transmission is carried out through the power line, and a separate communication line does not need to be arranged. The structure is compact, and the utilization rate of existing components is high.

[0091] The temperature switch acquisition part comprises EL357NB chips U16-U19, a connector J5, and a B0524LS-1W module U17. The 1st-6th pins of J5 are respectively connected to WQ_24V, WQ1, WQ_24V, WQ2, WQ_24V, and WQ3.

[0092] The 1st pin of U16 is connected to one end of a resistor R31, one end of a resistor R33, and one end of a capacitor C71. The other end of R31 is connected to WQ1. The other end of R33 is connected to WQGND, the other end of C71, and the 2nd pin of U16. The 3rd pin of U16 is connected to GND. The 4th pin of U16 is connected to WQ_IN1 and one end of a resistor R32. The other end of R32 is connected to VCC.

[0093] The 1st pin of U18 is connected to one end of a resistor R34, one end of a resistor R36, and one end of a capacitor C74. The other end of R34 is connected to WQ2. The other end of R36 is connected to WQGND, the other end of C74, and the 2nd pin of U18. The 3rd pin of U18 is connected to GND. The 4th pin of U18 is connected to WQ_IN2 and one end of a resistor R35. The other end of R35 is connected to VCC.

[0094] The 1st pin of U19 is connected to one end of a resistor R37, one end of a resistor R39, and one end of a capacitor C75. The other end of R37 is connected to WQ3. The other end of R39 is connected to WQGND, the other end of C75, and the 2nd pin of U19. The 3rd pin of U19 is connected to GND. The 4th pin of U19 is connected to WQ_IN3 and one end of a resistor R38. The other end of R38 is connected to VCC.

[0095] The 1st pin of U17 is connected with one end of inductor L13, one end of capacitor C68 and one end of capacitor C69 respectively, the other end of L13 is connected with 5V, positive pole of capacitor E6 and one end of capacitor C70 respectively, the negative pole of E6 is connected with GND, the other end of C70, the other end of C68, the other end of C69 and the 2nd pin of U17 respectively, the 6th pin of U17 is connected with one end of capacitor C72, WQ_24V and positive pole of capacitor E7 respectively, the 4th pin of U17 is connected with the other end of C72, WQGND, the negative pole of E7 and one end of capacitor C73 respectively, the other end of C73 is connected with GND.

[0096] WQ1-WQ3 are connected with three temperature switches (the temperature switches can adopt KSD301 temperature switches) respectively. The three temperature switches can be placed at different positions of the photovoltaic panel according to certain intervals, so that the fire can be monitored in time, and the photovoltaic panel area is large and cannot be monitored in time.

[0097] The KSD301 temperature switch has a 90℃ detection pin and a 120℃ detection pin.

[0098] The temperature signal detected by the temperature switch is transmitted to the main control part after being isolated by an optical coupler (U16, U18, U19).

[0099] The temperature switch acquisition part detects the temperature, when the temperature exceeds 90℃ and lasts for 5-10 seconds, it is judged that a fire occurs, and U1 controls the fire extinguishing device to work through U53.

[0100] When the temperature reaches 120℃, it is judged that a fire occurs.

[0101] The 90℃ and 120℃ temperature monitoring points are set respectively, which can detect the fire more accurately and efficiently. Some cases of fire occur slowly, for example, the temperature may fluctuate between 90℃ and 120℃ in some cases.

[0102] The temperature value acquisition part collects the temperature rise change.

[0103] The charging part includes TDK15-24S15 module U10, ME4058C6SG chip U11 and connector J4, the 1st pin of U10 is connected with +24V, the 2nd pin of U10 is connected with GND, the 6th pin of U10 is connected with positive pole of capacitor C54, one end of capacitor C55 and 15VIN through inductor L6 respectively, the 4th pin of U10 is connected with negative pole of C54, the other end of C55 and GND respectively;

[0104] The 1 pin of U11 is connected with one end of resistor R23 and one end of capacitor C57 respectively, the other end of C57 is connected with GND and the other end of R23 respectively, the 2 pin of U11 is connected with the cathode of diode D5, the positive pole of capacitor C58 and one end of capacitor C59 respectively, the anode of D5 is connected with 15VIN, the negative pole of C58 is connected with GND, the other end of C59 and the 4 pin of U11 respectively, the 5 pin of U11 is connected with BATIN through LED5 and resistor R25 in sequence, the 6 pin of U11 is connected with one end of capacitor C60, BATIN and one end of resistor R26 respectively, the other end of C60 is connected with GND, the other end of R26 is connected with the 7 pin of U11 and one end of inductor L7 respectively, the other end of L7 is connected with the cathode of voltage stabilizing diode D4 and the source of MOSFET P tube Q2 respectively, the gate of Q2 is connected with the 3 pin of U11, the drain of Q2 is connected with the cathode of D5;

[0105] The 1 and 2 pins of J4 are connected with BATIN and GND respectively.

[0106] The charging circuit functions to charge the battery with the electric energy generated by the photovoltaic panel. The battery supplies power for the device in the case that the photovoltaic panel cannot generate electricity normally. BATIN is connected with the positive pole of the battery.

[0107] U11 controls the duty cycle of the conduction and turn-off of Q2, and controls the charging of the battery. The 5 pin of U11 detects the voltage of the battery, and when the detected voltage of the battery is lower than the set value, the duty cycle is increased to increase the charging current.

[0108] The current acquisition part includes F0305S-1W module U36, TLV2262 chip U38A, ADR291 chip U39, ADS8341 chip U40, H11L1 chip U41, ADUM1300 chip U42 and current transformer U43, the 1 pin of U36 is connected with one end of inductor L20, one end of capacitor C126 and positive electrode of capacitor E16 respectively, the other end of L20 is connected with VCC_3.3V and one end of capacitor C125 respectively, the other end of C125 is connected with GND, the other end of C126, negative electrode of E16, the 2 pin of U36 and one end of capacitor C133 respectively, the other end of C133 is connected with COM; the 6 pin of U36 is connected with one end of capacitor C124 and one end of inductor L21 respectively, the other end of C124 is connected with the 4 pin of U36 and one end of inductor L22 respectively, the other end of L21 is connected with one end of capacitor C127, positive electrode of capacitor E17, the 1 pin of S818-5 chip U37 and the 3 pin of U37 respectively, the 2 pin of U37 is connected with the other end of L22, the other end of C127, negative electrode of E17, IGD, one end of capacitor C128, negative electrode of capacitor E18, one end of capacitor C129, one end of capacitor C130, one end of capacitor C131 and one end of capacitor C132 respectively, the 5 pin of U37 is connected with I5V, the other end of C128, positive electrode of E18, the other end of C129, the other end of C130, the other end of C131 and the other end of C132 respectively;

[0109] The 3 pin of U38A is connected with one end of capacitor C136 and one end of resistor R56 respectively, the other end of C136 is connected with COM, the other end of R56 is connected with one end of capacitor C137, one end of resistor R55 and one end of capacitor C134 respectively, the other end of C134 is connected with CH0, the 1 pin of U38A and the 2 pin of U38A respectively, the 8 pin of U38A is connected with one end of capacitor C52, I5V and one end of capacitor C135 respectively, the other end of C52 is connected with IGD, the other end of C135 is connected with COM and one end of capacitor C139 respectively, the other end of C139 is connected with IGD and the 4 pin of U38A respectively; the other end of R55 is connected with the 3 pin of BAV199 tube D9 (D9 is used for filtering interference in the transmission process of current detection signal. The current detection signal is an analog quantity, the signal voltage is low, and high-frequency oscillation interference will be generated in the transmission process through the transmission line. The high-voltage interference signal is released through D9, and the interference voltage is clamped on the power supply voltage I5V), one end of resistor R57 and one end of resistor R58, the 2 pin of D9 is connected with I5V, the 1 pin of D9 is connected with IGD, the other end of R57 is connected with Iin0, and the other end of R58 is connected with COM;

[0110] The 5th pin of U38A is connected with one end of capacitor C145 and one end of resistor R63, the other end of C145 is connected with COM, the other end of R63 is connected with one end of capacitor C146, one end of resistor R62 and one end of capacitor C143, the other end of C143 is connected with CH1, the 7th pin of U38A and the 6th pin of U38A; the other end of R62 is connected with the 3rd pin of BAV199 tube D10, one end of resistor R64 and one end of resistor R65, the 2nd pin of D10 is connected with I5V, the 1st pin of D10 is connected with IGND, the other end of R64 is connected with Iin1, the other end of R65 is connected with COM;

[0111] The 1st to 4th pins of U43 are connected with I5V, IGND, Iin0 and COM respectively, the 5th pin of U43 is connected with the 1st pin of connector J12, the 2nd pin of J12 is connected with the 6th pin of U43;

[0112] VCC_3.3V is connected with one end of capacitor C141, one end of capacitor C142 and the positive electrode of capacitor E20 respectively, the other end of C141 is connected with the other end of C142, the negative electrode of E20 and GND respectively;

[0113] The 6th pin of U39 is connected with +2.5V and one end of capacitor C138 respectively, the other end of C138 is connected with IGND, the 2nd pin of U39 is connected with I5V, the 4th pin of U39 is connected with IGND;

[0114] The 8th pin of U40 is connected with +2.5V, the positive electrode of capacitor E21 and one end of capacitor C144 respectively, the other end of C144 is connected with the negative electrode of E21 and IGND respectively, the 2nd, 3rd and 6th pins of U40 are connected with CH0, CH1 and COM respectively, the 10th and 11th pins of U40 are connected with IGND, the 14th pin of U40 is connected with the 14th pin of ADUM1300 chip U42 and DIN respectively, the 15th pin of U40 is connected with the 13th pin of U42 and CS respectively, the 16th pin of U40 is connected with the 12th pin of U42 and CLK respectively, the 9th, 10th, 15th, 16th, 1st to 5th and 8th pins of U42 are connected with IGND, I5V, IGND, I5V, VCC_3.3V, GND, M_DIN1, M_CS1, M_CLK1 and GND respectively; the 12th pin of U40 is connected with the 2nd pin of H11L1 module U41 through resistor R61, the 1st pin of U41 is connected with +5V, the 4th pin of U41 is connected with M_DOUT1 and one end of resistor R60 respectively, the other end of R60 is connected with the 6th pin of U41 and VCC_3.3V respectively, the 5th pin of U41 is connected with ground; the 7th pin of U40 is connected with one end of resistor R59, the positive electrode of capacitor E19 and one end of capacitor C140 respectively, the other end of R59 is connected with +5V, the negative electrode of E19 is connected with IGND and the other end of C140 respectively.

[0115] The current collection part of the application can be applied to a photovoltaic assembly including two photovoltaic panels, the areas of the two photovoltaic panels can be different, the photovoltaic panel with a larger area has a larger power, the two photovoltaic panels are connected in series, the currents of the two photovoltaic panels are equal, the voltage collection circuit collects the voltages of the two photovoltaic panels respectively, the current collection part detects the current, detects the power in real time, and can refer to comparison, detects which photovoltaic panel has a voltage lower than the voltage in the normal state, detects which photovoltaic panel has a power lower than the power in the normal state, and detects whether the panel has a problem (such as hot spot, short circuit, hidden crack and the like). It can also be that the cloud blocks, after continuous detection for a period of time, if the voltage of a photovoltaic panel is always lower than the voltage in the normal state, it is judged that the photovoltaic panel has a problem.

[0116] U43 is an FXBY20 current transformer, which converts the current signal into a voltage signal through a subsequent circuit, and then transmits the voltage signal to U42 through A / D conversion by U40, and U42 sends the detection signal to the main control part.

[0117] The current transformer U43 is sleeved on the output line of the photovoltaic panel, the current signal is converted into a voltage signal through the inductive current transformer U43, and then the voltage signal is transmitted to U42 through A / D conversion by U40, and U42 sends the detection signal to the main control part.

[0118] U38A is a voltage comparator, U38A and R55, C137, R56, C136 form a second-order filter circuit, the filter circuit is used for filtering out high-frequency signals in interference, and D9 is used for filtering out high-voltage amplitude signals in interference.

[0119] The function of U40 is to convert the detected analog signal into a digital signal, and then input the detection signal to U1 after isolating the input end and the output end by U42.

[0120] The constant current part includes F0324S-1W module U13, EL357NB chip U14 and AD8541ARTZ-REEL7 chip U15, the 1 pin of U13 is connected with one end of inductor L8, one end of capacitor C64 and positive electrode of capacitor E3 respectively, the other end of L8 is connected with VCC_3.3V and one end of capacitor C63 respectively, the other end of C63 is connected with GND, the other end of C64, negative electrode of E3, the 2 pin of U13 and one end of capacitor C66 respectively, the other end of C66 is connected with LGND; the 6 pin of U13 is connected with one end of capacitor C61 and one end of inductor L9 respectively, the other end of L9 is connected with one end of capacitor C65, V24V, positive electrode of capacitor E4 and the 1 pin of LM7805S2 / TR module U12 respectively, the negative electrode of E4 is connected with LGND, the other end of C65 and one end of inductor L10 respectively, the other end of L10 is connected with the 4 pin of U13 and the other end of C61 respectively; the 3 pin of U12 is connected with one end of capacitor C62, positive electrode of capacitor E5 and H5V respectively, the 4 pin of U12 is connected with LGND, the other end of C62 and negative electrode of E5 respectively;

[0121] The 1 pin of U14 is connected with VCC_3.3V, the 2 pin of U14 is connected with LED1, the 4 pin of U14 is connected with H5V, the 2 pin of U14 is connected with one end of resistor R29 and the 3 pin of U15 through resistor R27 respectively, the other end of R29 is connected with LGND, the 2 pin of U15 is connected with LGND, the 5 pin of U15 is connected with VCC and one end of capacitor C50 respectively, the other end of C50 is connected with LGND, the 1 pin of U15 is connected with the base of 2SC5886A tube Q3 through resistor R28, the emitter of Q3 is connected with the 4 pin of U15 and one end of resistor R30 respectively, the other end of R30 is connected with LGND; the collector of Q3 is connected with one end of capacitor C49, one end of capacitor C67, anode of voltage stabilizing diode D6 and one end of inductor L12 respectively, the other end of C49 is connected with V24V, the other end of C67, cathode of D6 and one end of inductor L11 respectively, the other end of L11 is connected with the other end of L12 in turn through light emitting diodes LED6-LED10, LED15-LED11.

[0122] The constant current part drives light emitting diodes LED6-LED10, LED15-LED11 to perform local alarm, so that relevant personnel can quickly find the photovoltaic panel with problems. It is convenient for unmanned aerial vehicle to quickly identify the fault photovoltaic panel (the unmanned aerial vehicle is operated by human, the unmanned aerial vehicle detects the image below through pyroelectricity and video camera, the light emitting diodes LED6-LED10, LED15-LED11 emit light, which is convenient for the unmanned aerial vehicle to find the alarm position), and indicates the position for maintenance personnel.

[0123] The voltage acquisition part includes F0305S-1W module U29, TLV2262 chip U31, ADR291 chip U32, connector J10, connector J11, AD7708 / 28 chip U34, H11L1 chip U33 and ADUM1300 chip U35, the 1 pin of U29 is connected with one end of inductor L17, one end of capacitor C102 and positive pole of capacitor E12 respectively, the other end of L17 is connected with VCC_3.3V and one end of capacitor C101 respectively, the other end of C101 is connected with GND, the other end of C102, negative pole of E12, the 2 pin of U29 and one end of capacitor C109 respectively, the other end of C109 is connected with VGND; the 6 pin of U29 is connected with one end of capacitor C100 and one end of inductor L18 respectively, the other end of C100 is connected with the 4 pin of U29 and one end of inductor L19 respectively, the other end of L18 is connected with one end of capacitor C103, positive pole of capacitor E13, the 1 pin of S818-5 chip U30 and the 3 pin of U30 respectively, the 2 pin of U30 is connected with the other end of L19, the other end of C103, negative pole of E13, VGND, one end of capacitor C104, negative pole of capacitor E14, one end of capacitor C105, one end of capacitor C106, one end of capacitor C107 and one end of capacitor C108 respectively, the 5 pin of U30 is connected with V5V, the other end of C104, positive pole of E14, the other end of C105, the other end of C106, the other end of C107 and the other end of C108 respectively;

[0124] The 3 pin of U31A is connected with one end of resistor R46 and one end of capacitor C112 respectively, the other end of C112 is connected with VGND, the other end of R46 is connected with one end of capacitor C113, one end of resistor R45 and one end of capacitor C111 respectively, the other end of C113 is connected with VGND; the other end of C111 is connected with the 1 pin of U31, AIN1 and the 2 pin of U31 respectively, the 8 pin of U31 is connected with V5V and one end of capacitor C110 respectively, the other end of C110 is connected with VGND, the 4 pin of U31 is connected with VGND; the other end of R45 is connected with the 3 pin of BAV199 tube D7, one end of resistor R47 and one end of resistor R48 respectively, the 2 pin of D7 is connected with V5V, the 1 pin of D7 is connected with VGND; the other end of R47 is connected with VIN1, the other end of R48 is connected with VGND;

[0125] The 5 pin of U31B is connected with one end of resistor R50 and one end of capacitor C118 respectively, the other end of C118 is connected with VGND, the other end of R50 is connected with one end of capacitor C119, one end of resistor R49 and one end of capacitor C115 respectively, the other end of C119 is connected with VGND; the other end of C115 is connected with the 7 pin of U31, AIN2 and the 6 pin of U31 respectively; the other end of R49 is connected with the 3 pin of BAV199 tube D8, one end of resistor R53 and one end of resistor R54 respectively, the 2 pin of D8 is connected with V5V, the 1 pin of D8 is connected with VGND; the other end of R53 is connected with VIN2, the other end of R54 is connected with VGND;

[0126] The 1st and 2nd pins of J10 are connected to VIN1 and GND respectively, and the 1st and 2nd pins of J11 are connected to VIN2 and GND respectively;

[0127] The 6th pin of U32 is connected to +2.5V and one end of capacitor C114 respectively, the other end of C114 is connected to VGND, the 2nd pin of U32 is connected to V5V, and the 4th pin of U32 is connected to VGND;

[0128] The 5th pin of U34 is connected to VGND, one end of capacitor C123 and one end of capacitor C121 respectively, the other end of C121 is connected to +2.5V, the positive pole of C123 and the 6th pin of U34 respectively; the 7th and 8th pins of U34 are connected to AIN1 and AIN2 respectively; the 12th pin of U34 is connected to VGND, the 25th pin of U34 is connected to the 17th pin of U34, the 4th pin of U34, one end of capacitor C51 and the negative pole of capacitor E1 respectively, the positive pole of E1 is connected to the other end of C51, V5V, the 3rd pin of U34 and the 26th pin of U34 respectively, the 19th pin of U34 is connected to V5V through resistor R86, the 21st, 20th, 23rd and 24th pins of U34 are connected to AD_SPI_CS, AD_SPI_CLK, AD_SPI_DOUT and AD_SPI_DIN respectively; the 27th pin of U34 is connected to one end of crystal X2 and one end of capacitor C122 respectively, the other end of C122 is connected to VGND (the shell of crystal X2 is metal, the metal shell is grounded to eliminate interference signals) and one end of capacitor C120 respectively, the other end of C120 is connected to the other end of X2 and the 28th pin of U34 respectively;

[0129] The 1st pin of U33 is connected to +5V, the 2nd pin of U33 is connected to AD_SPI_DOUT through resistor R52, the 4th pin of U33 is connected to M_DOUT and one end of resistor R51 respectively, the other end of R51 is connected to VCC_3.3V and the 6th pin of U33 respectively, and the 5th pin of U33 is connected to GND;

[0130] The 9th pin of U35 is connected to VGND, the 10th pin of U35 is connected to V5V, and the 12th to 16th pins of U35 are connected to AD_SPI_CLK, AD_SPI_CS, AD_SPI_DIN, VGND and V5V respectively; the 1st to 5th and 8th pins of U35 are connected to VCC_3.3V, GND, M_DIN, M_CS, M_CLK and GND respectively;

[0131] VCC_3.3V is connected to one end of capacitor C116, one end of capacitor C117 and the positive pole of capacitor E15 respectively, the negative pole of E15 is connected to the other end of C116, the other end of C117 and GND respectively.

[0132] J10 and J11 are connected with a Hall voltage sensor respectively, one Hall voltage sensor detects the voltage between two ends of one photovoltaic panel.

[0133] VIN1 is sent to U34 for analog-digital conversion after being divided by R47, R48 and low-pass filtered (a low-pass filter composed of R45, C113, R46, C112 and U31A), and then the input and output are isolated by U35, and the detection signal is input to U1.

[0134] The relay output part includes F0305S-1W module U52, EL357NB chip U53 and connector J14, the 1 pin of U52 is connected with one end of inductor L35, one end of capacitor C171 and positive electrode of capacitor E27 respectively, the other end of L35 is connected with VCC_3.3V and one end of capacitor C170 respectively, the other end of C170 is connected with GND, the other end of C171, negative electrode of E27, 2 pin of U52 and one end of capacitor C173 respectively, the other end of C173 is connected with DOGND; the 6 pin of U52 is connected with one end of capacitor C169 and inductor L36 respectively, the other end of C169 is connected with 4 pin of U52 and one end of inductor L37 respectively, the other end of L37 is connected with one end of capacitor C172, DOGND and negative electrode of capacitor E28 respectively, the positive electrode of E28 is connected with 5VRY, the other end of C172 and the other end of L36 respectively;

[0135] The 1 pin of U53 is connected with VCC_3.3V, the 2 pin of U53 is connected with DO1, the 4 pin of U53 is connected with 5VRY, the 3 pin of U53 is connected with one end of resistor R84 and base of NPN transistor Q6 through resistor R83 respectively, the other end of R84 is connected with DOGND and emitter of Q6 respectively, the collector of Q6 is connected with anode of diode D21 and one end of coil of relay K2 respectively, the cathode of D21 is connected with 5VRY and the other end of the coil of K2 respectively, the controlled switch of K2 is connected with BATIN and KB respectively, KB and BATOUT are connected with 1 pin and 2 pin of connector J14 respectively.

[0136] The relay output part can be used to control the working of GQQ90 heptafluoropropane fire extinguishing device. When fire is found, the fire extinguishing device is started by controlling relay K2 to extinguish the fire and prevent the fire from expanding.

[0137] The relay output part is used to control the start of the fire extinguishing device and whether to supply power to the fire extinguishing device, the 2 pin of U53 receives the control signal of U1 to control whether Q6 is conductive, and then control the opening and closing of K2 to control the working of the fire extinguishing device.

[0138] BATIN is connected with the positive electrode of the storage battery. KB is connected with the power supply port of the fire extinguishing device.

[0139] Every two photovoltaic panels can correspond to one photovoltaic module shutdown host and one GQQ90 heptafluoropropane fire extinguishing device.

[0140] The GQQ90 heptafluoropropane fire extinguishing device is automatically sprayed when powered on, and can be arranged in the obliquely upper position of the photovoltaic panel without blocking light, and the spraying area covers the entire photovoltaic panel.

[0141] The temperature value acquisition part includes F0305S-1W module U20, AD8541 chip U22, AD8541 chip U25, AD8541 chip U26, AD8541 chip U27, ADR291 chip U24, ADUM1401 chip U23, and AD7124-4BBCPZ chip U28. The 1 pin of U20 is connected with one end of inductor L14, one end of capacitor C78, and the positive electrode of capacitor E8, respectively. The other end of L14 is connected with VCC_3.3V and one end of capacitor C77, respectively. The other end of C77 is connected with GND, the other end of C78, the negative electrode of E8, the 2 pin of U20, and one end of capacitor C81, respectively. The other end of C81 is connected with AIGND. The 6 pin of U20 is connected with one end of capacitor C76 and one end of inductor L15, respectively. The other end of C76 is connected with the 4 pin of U20 and one end of inductor L16, respectively. The other end of L15 is connected with one end of capacitor C79, the positive electrode of capacitor E9, the 1 pin of S818-3.3 chip U21, and the 3 pin of U21, respectively. The 2 pin of U21 is connected with the other end of L16, the other end of C79, the negative electrode of E9, AIGND, and one end of capacitor C80, respectively. The 5 pin of U21 is connected with AIVCC and the other end of C80, respectively.

[0142] The 5 pin of U22 is connected with AIVCC and one end of capacitor C82, respectively. The other end of C82 is connected with AIGND. The 2 pin of U22 is connected with AIGND. The 1 pin of U22 is connected with the 4 pin of U22, AIN1, and one end of capacitor C84, respectively. The other end of C84 is connected with AIGND. The 3 pin of U22 is connected with one end of resistor R40 and one end of capacitor C83, respectively. The other end of C83 is connected with AIGND. The other end of R40 is connected with IOUT1 and the 1 pin of connector J6, respectively. The 2 pin of J6 is connected with AIGND.

[0143] The 5 pin of U25 is connected with AIVCC and one end of capacitor C85, respectively. The other end of C85 is connected with AIGND. The 2 pin of U25 is connected with AIGND. The 1 pin of U25 is connected with the 4 pin of U25, AIN2, and one end of capacitor C88, respectively. The other end of C88 is connected with AIGND. The 3 pin of U25 is connected with one end of resistor R41 and one end of capacitor C87, respectively. The other end of C87 is connected with AIGND. The other end of R41 is connected with IOUT2 and the 1 pin of connector J7, respectively. The 2 pin of J7 is connected with AIGND.

[0144] The 5th pin of U26 is connected with AIVCC and one end of capacitor C90 respectively, the other end of C90 is connected with AIGND, the 2nd pin of U26 is connected with AIGND, the 1st pin of U26 is connected with the 4th pin of U26, AIN3 and one end of capacitor C95 respectively, the other end of C95 is connected with AIGND, the 3rd pin of U26 is connected with one end of resistor R42 and one end of capacitor C93 respectively, the other end of C93 is connected with AIGND, the other end of R42 is connected with IOUT3 and the 1st pin of connector J8 respectively, the 2nd pin of J8 is connected with AIGND;

[0145] The 5th pin of U27 is connected with AIVCC and one end of capacitor C97 respectively, the other end of C97 is connected with AIGND, the 2nd pin of U27 is connected with AIGND, the 1st pin of U27 is connected with the 4th pin of U27, AIN4 and one end of capacitor C99 respectively, the other end of C99 is connected with AIGND, the 3rd pin of U27 is connected with one end of resistor R44 and one end of capacitor C98 respectively, the other end of C98 is connected with AIGND, the other end of R44 is connected with IOUT4 and the 1st pin of connector J9 respectively, the 2nd pin of J9 is connected with AIGND;

[0146] The 6th pin of U24 is connected with +2.5V and one end of capacitor C86 respectively, the other end of C86 is connected with AIGND, the 2nd pin of U24 is connected with R5V, the 4th pin of U24 is connected with AIGND;

[0147] The 1st-16th pins of U23 are connected with VCC_3.3V, GND, AI_DIN-2, AI_CLK-2, AI_CS-2, AI_DOUT-2, VCC_3.3V, GND, AIGND, AIVCC, AI_DOUT2, AI_CS2, AI_CLK2, AI_DIN2, AIGND, AIVCC respectively;

[0148] The 1st pin of U28 is connected with AIGND through capacitor C89, the 2nd pin of U28 is connected with AIVCC and one end of capacitor C91 respectively, the other end of C91 is connected with AIGND and the 3rd pin of U28 respectively; the 4th, 5th, 8th, 9th, 12th, 13th and 16th pins of U28 are connected with IOUT1, IOUT2, IOUT3, IOUT4, +2.5V, AIGND and AIN1 respectively; the 17th, 20th and 21st pins of U28 are connected with AIN2, AIN3 and AIN4 respectively; the 22nd pin of U28 is connected with the positive pole of capacitor E11 and one end of capacitor C96 respectively, the negative pole of E11 is connected with AIGND and the other end of C96 respectively, the 23rd pin of U28 is connected with AIGND and one end of capacitor C94 respectively, the other end of C94 is connected with the 24th pin of U28, the 25th pin of U28 is connected with AIGND, the 26th pin of U28 is connected with AIVCC, one end of resistor R43, the negative pole of capacitor E10 and one end of capacitor C92 respectively, the positive pole of E10 is connected with the other end of C92 and AIGND respectively, the other end of R43 is connected with the 27th pin of U28, the 28th, 29th, 31st and 32nd pins of U28 are connected with AI_DOUT2, AI_DIN2, AI_CLK2 and AI_CS2 respectively.

[0149] J6-J9 are connected with a thermistor respectively, C83, C87, C93 and C98 are used for low-pass filtering, then the detection signal is sent to operational amplifier AD8541, then the detection signal is sent to U1 through U23 (U23 is a level conversion chip, which converts the voltage amplitude of the input signal into the voltage amplitude that can be received by U1).

[0150] As described above, one photovoltaic module shutdown device host of the application corresponds to two series-connected photovoltaic panels, and one thermistor can be placed on each side of each photovoltaic panel.

[0151] The temperature value acquisition part acquires temperature rise change. When the temperature exceeds 70 degrees, if the temperature rise exceeds five degrees in one minute (the natural condition will not appear such a rapid temperature rise), it is judged that a fire occurs, U1 controls the constant current part to start the alarm, and controls the relay output part to start the fire extinguishing device to extinguish the fire. The temperature rise change is used to determine whether a fire occurs, and the natural temperature rise condition is distinguished, so that the judgment is more accurate.

[0152] The temperature switch acquisition part and the temperature value acquisition part respectively detect the temperature point value and the temperature change value to jointly determine the fire, and this detection method can more accurately determine the fire.

[0153] The triode control part includes F0305S-1W module U8, F0315S-1W module U54, ADuM1251 chip U57, GP8202 chip U58, XL2596S-ADJ chip U59 and CRG40T60AN3H tube Q8, the 1st pin of U8 is connected with one end of inductor L3, one end of capacitor C175 and the positive electrode of capacitor E2 respectively, the other end of L3 is connected with VCC_3.3V and one end of capacitor C174 respectively, the other end of C174 is connected with GND, the other end of C175, the negative electrode of E2, the 2nd pin of U8 and one end of capacitor C181 respectively, the other end of C181 is connected with PGND; the 6th pin of U8 is connected with one end of capacitor C53 and one end of inductor L4 respectively, the other end of C53 is connected with the 4th pin of U8 and one end of inductor L39 respectively, the other end of inductor L39 is connected with one end of capacitor C176, PGND and the negative electrode of capacitor E29 respectively, the positive electrode of E29 is connected with 5VRY, the other end of C176 and the other end of L4 respectively;

[0154] The 1st pin of U54 is connected with one end of inductor L41, one end of capacitor C185 and the positive electrode of capacitor E32 respectively, the other end of L41 is connected with VCC_3.3V and one end of capacitor C184 respectively, the other end of C184 is connected with GND, the other end of C185, the negative electrode of E32, the 2nd pin of U54 and one end of capacitor C187 respectively, the other end of C187 is connected with PGND; the 6th pin of U54 is connected with one end of capacitor C183 and one end of inductor L42 respectively, the other end of C183 is connected with the 4th pin of U54 and one end of inductor L43 respectively, the other end of inductor L43 is connected with one end of capacitor C186, PGND and the negative electrode of capacitor E33 respectively, the positive electrode of E33 is connected with 5VRY, the other end of C186 and the other end of L42 respectively;

[0155] The 1st pin of U57 is connected with VCC_3.3V, the 2nd pin of U57 is connected with SDA1 and one end of resistor R21 respectively, the other end of R21 is connected with VCC_3.3V and one end of resistor R74 respectively, the other end of R74 is connected with SCL1 and the 3rd pin of U57 respectively, the 4th pin of U57 is connected with GND; the 5th pin of U57 is connected with PGND, the 6th pin of U57 is connected with one end of resistor R76 and U58_SCL respectively, the other end of R76 is connected with 5VRY and one end of resistor R75 respectively, the other end of R75 is connected with the 7th pin of U57 and U58_SDA respectively, the 8th pin of U57 is connected with 5VRY;

[0156] VCC_3.3V is connected with one end of capacitor C153 and one end of capacitor C160 respectively, the other end of C153 is connected with GND and the other end of C160 respectively; 5VRY is connected with one end of capacitor C161 and one end of capacitor C162 respectively, the other end of C161 is connected with PGND and the other end of C162 respectively;

[0157] The 1st, 2nd, 4th and 6th pins of U58 are connected with U58_SCL, U58_SDA, 15VRY and FB respectively, the 5th pin of U58 is connected with the 7th pin of U58, PGND and one end of capacitor C188, and the other end of C188 is connected with the 8th pin of U58;

[0158] The 1st pin of U59 is connected with 15VRY, one end of capacitor C191 and one end of capacitor C192, the other end of C191 is connected with the other end of C192, the 5th pin of U59, the 3rd pin of U59, the anode of diode D22, the negative pole of capacitor C189, one end of capacitor C190 and PGND, the cathode of D22 is connected with the 2nd pin of U59 and one end of inductor L44, the other end of L44 is connected with the positive pole of C189, the other end of C190 and VA, and the 4th pin of U59 is connected with FB;

[0159] The collector of Q8 is connected with PV+, the gate of Q8 is connected with one end of resistor R22, VA and the cathode of voltage stabilizing tube D3, the anode of D3 is connected with the anode of voltage stabilizing tube D17, the cathode of D17 is connected with PGND, the other end of R22, the emitter of Q8 and PV+_OUT.

[0160] The output positive pole PV+ of photovoltaic module is connected with PV+_OUT through Q8, and whether PV+_OUT is connected with PV+ is controlled by Q8.

[0161] PV+_OUT is connected with the photovoltaic panel of next group of photovoltaic modules, the previous group of photovoltaic modules is connected with the next group of photovoltaic modules in series, each group of photovoltaic modules corresponds to a photovoltaic module shutdown host, the photovoltaic module shutdown host controls Q8 to disconnect the photovoltaic module of the current group from the next group of photovoltaic modules. At the same time, the control center receives the alarm signal sent by the photovoltaic module shutdown host control, and controls the photovoltaic module shutdown host of the previous group of photovoltaic modules to disconnect the previous group of photovoltaic modules from the photovoltaic module of the current group.

[0162] U57 is a digital isolator, the main control part is a weak current part, and the Q8 control circuit is a strong current part, the strong and weak currents are isolated through the digital isolator, so as to avoid the interference and damage of the strong current part to the main control part.

[0163] U58 receives digital control signal, outputs analog linear control signal through FB, and controls the working state of Q8 through U59.

[0164] The 6-pin output FB signal of U58 is linearly adjustable, controls the voltage of the 4-pin of U59, and then changes the output voltage value VA of U59 to control Q8. Q8 can be controlled to work in the conduction zone, the conduction zone can gradually transit to the amplification zone, and the amplification zone can gradually transit to the cut-off zone. In this way, the resistance in the conduction zone is very small, approximately zero, the resistance gradually and slowly increases, and increases to the resistance in the cut-off zone to infinity. In this process, the current flowing through Q8 slowly decreases, avoids the occurrence of the arc drawing (a plurality of photovoltaic module strings are connected in series, the voltage is high, and the existing relay is used for breaking, which can generate a very strong arc drawing), and is a soft shutdown process, so that the service life of the device is long.

[0165] When a fire occurs, Q8 is controlled to be turned off at the same time to cut off the rear stage.

[0166] It can be understood that the above specific description of the present application is only used to illustrate the present application and is not limited to the technical solutions described in the embodiments of the present application. Those skilled in the art should understand that the present application can still be modified or replaced equivalently to achieve the same technical effect, as long as the use needs are met, which is within the protection scope of the present application.

Claims

1. A photovoltaic module fault fire detection circuit comprising a temperature switch acquisition section, a current acquisition section, a voltage acquisition section, and a temperature value acquisition section, characterized in that The collection signal output port of the temperature switch collection part, the collection signal output port of the current collection part, the collection signal output port of the voltage collection part and the collection signal output port of the temperature value collection part are connected with the collection signal input port of the main control part respectively, and the signal transmission port of the main control part is connected with the signal transmission port of the carrier wave communication part; The current collection part comprises an F0305S-1W module U36, a TLV2262 chip U38A, an ADR291 chip U39, an ADS8341 chip U40, an H11L1 chip U41, an ADUM1300 chip U42 and a current transformer U43, the 1-pin of the U36 is connected with one end of an inductor L20, one end of a capacitor C126 and a positive electrode of a capacitor E16 respectively, the other end of the L20 is connected with a VCC_3.3V and one end of a capacitor C125 respectively, the other end of the C125 is connected with a GND, the other end of the C126, a negative electrode of the E16, the 2-pin of the U36 and one end of a capacitor C133 respectively, the other end of the C133 is connected with a COM; the 6-pin of the U36 is connected with one end of a capacitor C124 and one end of an inductor L21 respectively, the other end of the C124 is connected with the 4-pin of the U36 and one end of an inductor L22 respectively, the other end of the L21 is connected with one end of a capacitor C127, a positive electrode of a capacitor E17, a 1-pin of a S818-5 chip U37 and a 3-pin of the U37 respectively, the 2-pin of the U37 is connected with the other end of the L22, the other end of the C127, a negative electrode of the E17, a I5V, the other end of the C128, a negative electrode of a capacitor E18, one end of a capacitor C129, one end of a capacitor C130, one end of a capacitor C131 and one end of a capacitor C132 respectively, the 5-pin of the U37 is connected with the I5V, the other end of the C128, a positive electrode of the E18, the other end of the C129, the other end of the C130, the other end of the C131 and the other end of the C132 respectively; The 3-pin of the U38A is connected with one end of a capacitor C136 and one end of a resistor R56 respectively, the other end of the C136 is connected with a COM, the other end of the R56 is connected with one end of a capacitor C137, one end of a resistor R55 and one end of a capacitor C134 respectively, the other end of the C134 is connected with a CH0, a 1-pin of the U38A and a 2-pin of the U38A respectively, the 8-pin of the U38A is connected with one end of a capacitor C52, the I5V and one end of a capacitor C135 respectively, the other end of the C52 is connected with a I5V, the other end of the C135 is connected with a COM and one end of a capacitor C139 respectively, the other end of the C139 is connected with a I5V and a 4-pin of the U38A respectively; the other end of the R55 is connected with a 3-pin of a BAV199 tube D9, one end of a resistor R57 and one end of a resistor R58 respectively, a 2-pin of the D9 is connected with the I5V, a 1-pin of the D9 is connected with a I5V, the other end of the R57 is connected with a Iin0, the other end of the R58 is connected with a COM; The 1-4 pins of the U43 are connected with the I5V, the I5V, the Iin0 and the COM respectively, a 5-pin of the U43 is connected with a 1-pin of a connector J12, a 2-pin of the J12 is connected with a 6-pin of the U43; VCC_3.3V is connected with one end of capacitor C141, one end of capacitor C142 and positive pole of capacitor E20 respectively, the other end of C141 is connected with the other end of C142, negative pole of E20 and GND respectively; 6-pin of U39 is connected with +2.5V and one end of capacitor C138 respectively, the other end of C138 is connected with IGD, 2-pin of U39 is connected with I5V, 4-pin of U39 is connected with IGD; 8-pin of U40 is connected with +2.5V, positive pole of capacitor E21 and one end of capacitor C144 respectively, the other end of C144 is connected with negative pole of E21 and IGD respectively, 2-pin, 3-pin and 6-pin of U40 are connected with CH0, CH1 and COM respectively, 10-pin and 11-pin of U40 are connected with IGD, 14-pin of U40 is connected with 14-pin of ADUM1300 chip U42 and DIN respectively, 15-pin of U40 is connected with 13-pin of U42 and CS respectively, 16-pin of U40 is connected with 12-pin of U42 and CLK respectively, 9-pin, 10-pin, 15-pin, 16-pin, 1~5-pin and 8-pin of U42 are connected with IGD, I5V, IGD, I5V, VCC_3.3V, GND, M_DIN1, M_CS1, M_CLK1 and GND respectively; 2-pin of U41 is connected with 12-pin of U40 through resistor R61, 1-pin of U41 is connected with +5V, 4-pin of U41 is connected with M_DOUT1 and one end of resistor R60 respectively, the other end of R60 is connected with 6-pin of U41 and VCC_3.3V respectively, 5-pin of U41 is connected with ground; 7-pin of U40 is connected with one end of resistor R59, positive pole of capacitor E19 and one end of capacitor C140 respectively, the other end of R59 is connected with +5V, negative pole of E19 is connected with IGD and the other end of C140 respectively.

2. The photovoltaic module fault fire detection circuit of claim 1, wherein The temperature switch acquisition part includes EL357NB chips U16~U19, connector J5 and B0524LS-1W module U17, 1~6-pin of J5 are connected with WQ_24V, WQ1, WQ_24V, WQ2, WQ_24V and WQ3 respectively; 1-pin of U16 is connected with one end of resistor R31, one end of resistor R33 and one end of capacitor C71 respectively, the other end of R31 is connected with WQ1, the other end of R33 is connected with WQGND, the other end of C71 and 2-pin of U16 respectively, 3-pin of U16 is connected with GND, 4-pin of U16 is connected with WQ_IN1 and one end of resistor R32 respectively, the other end of R32 is connected with VCC; 1-pin of U18 is connected with one end of resistor R34, one end of resistor R36 and one end of capacitor C74 respectively, the other end of R34 is connected with WQ2, the other end of R36 is connected with WQGND, the other end of C74 and 2-pin of U18 respectively, 3-pin of U18 is connected with GND, 4-pin of U18 is connected with WQ_IN2 and one end of resistor R35 respectively, the other end of R35 is connected with VCC; The 1st pin of U19 is connected with one end of resistor R37, one end of resistor R39 and one end of capacitor C75 respectively, the other end of R37 is connected with WQ3, the other end of R39 is connected with WQGND, the other end of C75 and the 2nd pin of U19 respectively, the 3rd pin of U19 is connected with GND, the 4th pin of U19 is connected with WQ_IN3 and one end of resistor R38 respectively, the other end of R38 is connected with VCC; The 1st pin of U17 is connected with one end of inductor L13, one end of capacitor C68 and one end of capacitor C69 respectively, the other end of L13 is connected with 5V, positive pole of capacitor E6 and one end of capacitor C70 respectively, the negative pole of E6 is connected with GND, the other end of C70, the other end of C68, the other end of C69 and the 2nd pin of U17 respectively, the 6th pin of U17 is connected with one end of capacitor C72, WQ_24V and positive pole of capacitor E7 respectively, the 4th pin of U17 is connected with the other end of C72, WQGND, negative pole of E7 and one end of capacitor C73 respectively, the other end of C73 is connected with GND.

3. The photovoltaic module fault fire detection circuit of claim 1, wherein The voltage collecting part comprises F0305S-1W module U29, TLV2262 chip U31, ADR291 chip U32, connector J10, connector J11, AD7708 / 28 chip U34, H11L1 chip U33 and ADUM1300 chip U35, the 1st pin of U29 is connected with one end of inductor L17, one end of capacitor C102 and positive pole of capacitor E12 respectively, the other end of L17 is connected with VCC_3.3V and one end of capacitor C101 respectively, the other end of C101 is connected with GND, the other end of C102, negative pole of E12, the 2nd pin of U29 and one end of capacitor C109 respectively, the other end of C109 is connected with VGND; the 6th pin of U29 is connected with one end of capacitor C100 and one end of inductor L18 respectively, the other end of C100 is connected with the 4th pin of U29 and one end of inductor L19 respectively, the other end of L18 is connected with one end of capacitor C103, positive pole of capacitor E13, the 1st pin of S818-5 chip U30 and the 3rd pin of U30 respectively, the 2nd pin of U30 is connected with the other end of L19, the other end of C103, negative pole of E13, VGND, one end of capacitor C104, negative pole of capacitor E14, one end of capacitor C105, one end of capacitor C106, one end of capacitor C107 and one end of capacitor C108 respectively, the 5th pin of U30 is connected with V5V, the other end of C104, positive pole of E14, the other end of C105, the other end of C106, the other end of C107 and the other end of C108 respectively; The 3-pin of U31A is connected with one end of resistor R46 and one end of capacitor C112, the other end of C112 is connected with VGND, the other end of R46 is connected with one end of capacitor C113, one end of resistor R45 and one end of capacitor C111, the other end of C113 is connected with VGND; the other end of C111 is connected with the 1-pin of U31, AIN1 and the 2-pin of U31, the 8-pin of U31 is connected with V5V and one end of capacitor C110, the other end of C110 is connected with VGND, the 4-pin of U31 is connected with VGND; the other end of R45 is connected with the 3-pin of BAV199 tube D7, one end of resistor R47 and one end of resistor R48, the 2-pin of D7 is connected with V5V, the 1-pin of D7 is connected with VGND; the other end of R47 is connected with VIN1, the other end of R48 is connected with VGND; The 5-pin of U31B is connected with one end of resistor R50 and one end of capacitor C118, the other end of C118 is connected with VGND, the other end of R50 is connected with one end of capacitor C119, one end of resistor R49 and one end of capacitor C115, the other end of C119 is connected with VGND; the other end of C115 is connected with the 7-pin of U31, AIN2 and the 6-pin of U31; the other end of R49 is connected with the 3-pin of BAV199 tube D8, one end of resistor R53 and one end of resistor R54, the 2-pin of D8 is connected with V5V, the 1-pin of D8 is connected with VGND; the other end of R53 is connected with VIN2, the other end of R54 is connected with VGND; The 1-pin and 2-pin of J10 are connected with VIN1 and GND respectively, the 1-pin and 2-pin of J11 are connected with VIN2 and GND respectively; The 6-pin of U32 is connected with +2.5V and one end of capacitor C114, the other end of C114 is connected with VGND, the 2-pin of U32 is connected with V5V, the 4-pin of U32 is connected with VGND; The 5-pin of U34 is connected with VGND, negative pole of capacitor C123 and one end of capacitor C121, the other end of C121 is connected with +2.5V, positive pole of C123 and the 6-pin of U34; the 7-pin and 8-pin of U34 are connected with AIN1 and AIN2 respectively; the 12-pin of U34 is connected with VGND, the 25-pin of U34 is connected with the 17-pin of U34, the 4-pin of U34, one end of capacitor C51 and negative pole of capacitor E1, the positive pole of E1 is connected with the other end of C51, V5V, the 3-pin of U34 and the 26-pin of U34, the 19-pin of U34 is connected with V5V through resistor R86, the 21-pin, 20-pin, 23-pin and 24-pin of U34 are connected with AD_SPI_CS, AD_SPI_CLK, AD_SPI_DOUT and AD_SPI_DIN respectively; the 27-pin of U34 is connected with one end of crystal X2 and one end of capacitor C122, the other end of C122 is connected with VGND and one end of capacitor C120, the other end of C120 is connected with the other end of X2 and the 28-pin of U34; The 1st pin of U33 is connected with +5V, the 2nd pin of U33 is connected with AD_SPI_DOUT through resistor R52, the 4th pin of U33 is connected with M_DOUT and one end of resistor R51 respectively, the other end of R51 is connected with VCC_3.3V and the 6th pin of U33 respectively, the 5th pin of U33 is connected with GND; The 9th pin of U35 is connected with VGND, the 10th pin of U35 is connected with V5V, the 12th to 16th pins of U35 are connected with AD_SPI_CLK, AD_SPI_CS, AD_SPI_DIN, VGND and V5V respectively, the 1st to 5th and 8th pins of U35 are connected with VCC_3.3V, GND, M_DIN, M_CS, M_CLK and GND respectively; VCC_3.3V is connected with one end of capacitor C116, one end of capacitor C117 and the positive pole of capacitor E15 respectively, the negative pole of E15 is connected with the other end of C116, the other end of C117 and GND respectively.

4. The photovoltaic module fault fire detection circuit of claim 1, wherein The temperature value collecting part comprises F0305S-1W module U20, AD8541 chip U22, AD8541 chip U25, AD8541 chip U26, AD8541 chip U27, ADR291 chip U24, ADUM1401 chip U23 and AD7124-4BBCPZ chip U28, the 1st pin of U20 is connected with one end of inductor L14, one end of capacitor C78 and the positive pole of capacitor E8 respectively, the other end of L14 is connected with VCC_3.3V and one end of capacitor C77 respectively, the other end of C77 is connected with GND, the other end of C78, the negative pole of E8, the 2nd pin of U20 and one end of capacitor C81 respectively, the other end of C81 is connected with AIGND; the 6th pin of U20 is connected with one end of capacitor C76 and one end of inductor L15 respectively, the other end of C76 is connected with the 4th pin of U20 and one end of inductor L16 respectively, the other end of L15 is connected with one end of capacitor C79, the positive pole of capacitor E9, the 1st pin of S818-3.3 chip U21 and the 3rd pin of U21 respectively, the 2nd pin of U21 is connected with the other end of L16, the other end of C79, the negative pole of E9, AIGND and one end of capacitor C80 respectively, the 5th pin of U21 is connected with AIVCC and the other end of C80 respectively; The 5th pin of U22 is connected with AIVCC and one end of capacitor C82 respectively, the other end of C82 is connected with AIGND, the 2nd pin of U22 is connected with AIGND, the 1st pin of U22 is connected with the 4th pin of U22, AIN1 and one end of capacitor C84 respectively, the other end of C84 is connected with AIGND, the 3rd pin of U22 is connected with one end of resistor R40 and one end of capacitor C83 respectively, the other end of C83 is connected with AIGND, the other end of R40 is connected with IOUT1 and the 1st pin of connector J6 respectively, the 2nd pin of J6 is connected with AIGND; The 5th pin of U25 is connected with AIVCC and one end of capacitor C85 respectively, the other end of C85 is connected with AIGND, the 2nd pin of U25 is connected with AIGND, the 1st pin of U25 is connected with the 4th pin of U25, AIN2 and one end of capacitor C88 respectively, the other end of C88 is connected with AIGND, the 3rd pin of U25 is connected with one end of resistor R41 and one end of capacitor C87 respectively, the other end of C87 is connected with AIGND, the other end of R41 is connected with IOUT2 and the 1st pin of connector J7 respectively, the 2nd pin of J7 is connected with AIGND; The 5th pin of U26 is connected with AIVCC and one end of capacitor C90 respectively, the other end of C90 is connected with AIGND, the 2nd pin of U26 is connected with AIGND, the 1st pin of U26 is connected with the 4th pin of U26, AIN3 and one end of capacitor C95 respectively, the other end of C95 is connected with AIGND, the 3rd pin of U26 is connected with one end of resistor R42 and one end of capacitor C93 respectively, the other end of C93 is connected with AIGND, the other end of R42 is connected with IOUT3 and the 1st pin of connector J8 respectively, the 2nd pin of J8 is connected with AIGND; The 5th pin of U27 is connected with AIVCC and one end of capacitor C97 respectively, the other end of C97 is connected with AIGND, the 2nd pin of U27 is connected with AIGND, the 1st pin of U27 is connected with the 4th pin of U27, AIN4 and one end of capacitor C99 respectively, the other end of C99 is connected with AIGND, the 3rd pin of U27 is connected with one end of resistor R44 and one end of capacitor C98 respectively, the other end of C98 is connected with AIGND, the other end of R44 is connected with IOUT4 and the 1st pin of connector J9 respectively, the 2nd pin of J9 is connected with AIGND; The 6th pin of U24 is connected with +2.5V and one end of capacitor C86 respectively, the other end of C86 is connected with AIGND, the 2nd pin of U24 is connected with R5V, the 4th pin of U24 is connected with AIGND; The 1st-16th pins of U23 are connected with VCC_3.3V, GND, AI_DIN-2, AI_CLK-2, AI_CS-2, AI_DOUT-2, VCC_3.3V, GND, AIGND, AIVCC, AI_DOUT2, AI_CS2, AI_CLK2, AI_DIN2, AIGND, AIVCC respectively. The 1st pin of U28 is connected with AIGND through capacitor C89, the 2nd pin of U28 is connected with AIVCC and one end of capacitor C91 respectively, the other end of C91 is connected with AIGND and the 3rd pin of U28 respectively; the 4th, 5th, 8th, 9th, 12th, 13th and 16th pins of U28 are connected with IOUT1, IOUT2, IOUT3, IOUT4, +2.5V, AIGND and AIN1 respectively; the 17th, 20th and 21st pins of U28 are connected with AIN2, AIN3 and AIN4 respectively; the 22nd pin of U28 is connected with the positive pole of capacitor E11 and one end of capacitor C96 respectively, the negative pole of E11 is connected with AIGND and the other end of C96 respectively, the 23rd pin of U28 is connected with AIGND and one end of capacitor C94 respectively, the other end of C94 is connected with the 24th pin of U28, the 25th pin of U28 is connected with AIGND, the 26th pin of U28 is connected with AIVCC, one end of resistor R43, the negative pole of capacitor E10 and one end of capacitor C92 respectively, the positive pole of E10 is connected with the other end of C92 and AIGND respectively, the other end of R43 is connected with the 27th pin of U28, the 28th, 29th, 31st and 32nd pins of U28 are connected with AI_DOUT2, AI_DIN2, AI_CLK2 and AI_CS2 respectively.

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