Photovoltaic module snow-melting controller
By designing a snow melting controller for photovoltaic modules, integrating multiple circuits and sensors, the system can detect and precisely heat snow accumulation on the surface of photovoltaic modules, solving the problem of reduced power generation caused by snow accumulation on photovoltaic modules in mid-to-high latitude regions, improving power generation efficiency and reducing snow melting costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- LIAONING SOLAR ENERGY R&D CO LTD
- Filing Date
- 2022-01-07
- Publication Date
- 2026-06-09
AI Technical Summary
In mid- to high-latitude regions, snow accumulation on the surface of photovoltaic modules can significantly reduce the power generation of photovoltaic power plants, and existing snow melting technologies have not yet been able to effectively solve this problem.
A snow melting controller for photovoltaic modules was designed, which integrates CPU circuit, heating cable control circuit, snow depth detection circuit, etc. It realizes snow accumulation detection and heating control on the surface of photovoltaic modules through CNC gimbal and angle detection, and adopts an intelligent snow melting system to achieve precise heating of different parts.
It has improved the power generation efficiency of photovoltaic power plants, reduced snow melting costs, and achieved safe and reliable intelligent snow melting control.
Smart Images
Figure CN114157230B_ABST
Abstract
Claims
1. A photovoltaic module snow melting controller, comprising a CPU circuit, a heating cable control circuit, a photovoltaic module voltage detection circuit, a current detection circuit, an irradiation detection circuit, a keyboard and LCD screen circuit, a GPRS communication circuit, a CNC pan-tilt control circuit, a snow depth detection circuit, an angle detection circuit, and a temperature detection circuit, characterized in that... The signal transmission ports of the CPU circuit are connected to the signal transmission ports of the heating tape control circuit, voltage detection circuit, current detection circuit, irradiation detection circuit, keyboard and LCD screen circuit, GPRS communication circuit, CNC pan-tilt control circuit, snow depth detection circuit, angle detection circuit, and temperature detection circuit, respectively. The control signal output port of the heating tape control circuit is connected to the electric heating tape. The detection signal input port of the current detection circuit is connected to the current transformer. The detection signal input port of the irradiation detection circuit is connected to the detection signal output port of the irradiation sensor. The CNC pan-tilt control circuit is connected to the CNC pan-tilt. The CNC pan-tilt is mounted on a column. A snow depth sensor and a pan-tilt angle sensor are mounted on the upper part of the CNC pan-tilt. A photovoltaic module angle sensor is mounted on the photovoltaic module. The detection signal output ports of the pan-tilt angle sensor and the photovoltaic module angle sensor are connected to the detection signal input port of the angle detection circuit, respectively. The detection signal output port of the snow depth sensor is connected to the detection signal input port of the snow depth detection circuit. The CPU circuit uses the MM32F3273D7P chip U1. Pins 1-4 of U1 are connected to +3.3V, LCD-A0, LCD-RST, and LCD-CS respectively. Pin 5 of U1 is connected to one end of resistor R1, one end of crystal oscillator X1, and one end of capacitor C1. The other end of C1 is connected to ground and one end of capacitor C2. The other end of C2 is connected to the other end of X1, the other end of R1, and pin 6 of U1. Pins 7-12 of U1 are connected to RST, RD2, RD3, SCL, SDA, and GND respectively. Pin 12 of U1 is connected to the positive terminal of capacitor C3 and one end of capacitor C4. The negative terminal of C3 is connected to the other end of C4 and pin 13 of U1. Pins 14-32 of U1 are connected to UART4-TX, UART4-RX, UART2-TX, UART2-RX, GND, +3.3V, UART5-TX, UART5-RX, and ADC1 respectively. Connect ADC2, ADC4, GPRS-PWR, ADC3, ADC5, GND, UART3-TX, UART3-RX, GND, and +3.3V respectively. Connect pins 18 and 19 of U1 to both ends of C5, and pins 31 and 32 of U1 to both ends of C6. Pins 33 to 64 of U1 are respectively connected to L6 to L1, LE3 to LE1, UART1-RX, UART1-TX, RD1, INT3, JTMS, and GND. +3.3V, JTCK, ROW5~ROW1, COL5~COL1, GND, RD4, T-DQ, GND, and +3.3V are connected accordingly; pin 3 of P1 of the BM117-3.3 chip is connected to +15V, pin 2 of P1 is connected to +3.3V, one end of switch SW1 is connected to ground and one end of capacitor C13, the other end of SW1 is connected to one end of resistor R2, RST, and the other end of capacitor C13, and the other end of R2 is connected to +3.3V.
2. The photovoltaic module snow melting controller according to claim 1, characterized in that... The CNC gimbal control circuit includes a common-mode inductor LDM2. The first terminal of LDM2 is connected to +24V. The second terminal of LDM2 is connected to one end of inductor L4. The other end of L4 is connected to pin 1 of HLK-10D2424B chip P3. Pin 2 of P3 is connected to the third terminal of LDM2, and the fourth terminal of LDM2 is grounded. Pin 4 of P3 is connected to +24V-HY through inductor L5, and pin 3 of P3 is connected to GND-HY through inductor L6. Pin 1 of ST3485 chip U3 is connected to UART2-RX, and pins 2 and 3 of U3 are connected to RD2. Pin 4 of U3 is connected to UART2-TX. Pin 5 of U3 is connected to ground and one end of capacitor C29. The other end of C29 is connected to +3.3V and pin 8 of U3. Pin 6 of U3 is connected to one end of resistor R10, one end of resistor R11, and one end of resistor R12. The other end of R11 is connected to +3.3V. The other end of R12 is connected to RS485-A2. The other end of R10 is connected to pin 7 of U3, one end of resistor R8, and one end of resistor R9. The other end of R8 is grounded. The other end of R9 is connected to RS485-B2.
3. The photovoltaic module snow melting controller according to claim 1, characterized in that... The heat tracing control circuit includes a common-mode inductor LDM4. The first terminal of LDM4 is connected to +24V. The second terminal of LDM4 is connected to one end of inductor L10. The other end of L10 is connected to pin 1 of HLK-10D2424B chip P5. Pin 2 of P5 is connected to the third terminal of LDM4. The fourth terminal of LDM4 is grounded. Pin 4 of P5 is connected to +24V-RELAY through inductor L11, and pin 3 of P5 is connected to GND-RELAY through inductor L12. Pins 3, 4, 7, 8, 13, and 14 of the 74LVC373ADB chip U11 are connected to L1 to L6 respectively. Pin 11 of U11 is connected to LE1, and pins 2, 5, 6, 9, and 12 of U11... Pin 15 is connected to pins L1-1 to L1-6 respectively; pins 2, 4, 6, and 8 of TLP521-4 chip U12 are connected to pins L1-1 to L1-4 respectively; pins 2 and 4 of TLP521-2 chip U13 are connected to pins L1-5 and L1-6 respectively; pins 15, 13, 11, and 9 of U12 are connected to KM1-1, KM1-2, KM1-3, and KM1-4 respectively; pins 7 and 5 of U13 are connected to pins KM1-5 and KM1-6 respectively; pins 2, 4, 6, and 8 of TLP521-4 chip U15 are connected to pins L2-1 to L2-4 respectively; TLP521- Pins 2 and 4 of chip U16 are connected to pins L2-5 and L2-6 respectively; pins 15, 13, 11, and 9 of U15 are connected to KM2-1, KM2-2, KM2-3, and KM2-4 respectively; pins 7 and 5 of U16 are connected to KM2-5 and KM2-6 respectively; pins 3, 4, 7, 8, 13, and 14 of chip U14 are connected to L1 to L6 respectively; pin 11 of U14 is connected to LE2; pins 2, 5, 6, 9, 12, and 15 of chip U14 are connected to L2-1 to L2-6 respectively; pins 2, 4, 6, and 8 of chip U18 are connected to... Do not connect to pins L3-1 to L3-4 respectively; pins 2 and 4 of TLP521-2 chip U19 are connected to pins L3-5 and L3-6 respectively; pins 15, 13, 11, and 9 of U18 are connected to KM3-1, KM3-2, KM3-3, and KM3-4 respectively; pins 7 and 5 of U19 are connected to KM3-5 and KM3-6 respectively; pins 3, 4, 7, 8, 13, and 14 of 74LVC373ADB chip U17 are connected to L1 to L6 respectively; pin 11 of U17 is connected to LE3; pins 2, 5, 6, 9, 12, and 15 of U17 are connected to pins L3-1 to L3-6 respectively.
4. The photovoltaic module snow melting controller according to claim 1, characterized in that... The keyboard and LCD screen circuit includes a 74LV08A chip U9 and a JLX12864G-183-BN chip U10. Pins 1, 2, 5, 8, 9, and 12 of U9 are connected to COL1, COL2, COL3, INT3, COL5, and COL4 respectively. Pins 8 to 12 of U10 are connected to SDA, SCL, LCD-A0, LCD-RST, and LCD-CS respectively.
5. The photovoltaic module snow melting controller according to claim 1, characterized in that... The GPRS communication circuit includes a USR-GPRS232-7S3 chip U20. Pins 6 and 7 of U20 are connected to USR-TX and USR-RX respectively. Pin 10 of U20 is connected to PWR, and pin 15 of U20 is connected to G-LINK. Pin 1 of TPS79328DBVR chip P6 is connected to +3.3V, one end of capacitor C64, and one end of resistor R74. The other end of R74 is connected to pin 3 of P6. The other end of C64 is connected to ground and pin 2 of P6. Pin 4 of P6 is connected to ground and one end of capacitor C65 through capacitor C66. The other end of C65 is connected to pin 5 of P6. The base of NPN transistor Q1 is connected to one end of resistor R75 and one end of resistor R76. The other end of R75 is connected to USR-TX. R-TX and the other end of R76 are connected to +2.8V and one end of resistor R77, respectively. The other end of R77 is connected to the collector of Q1 and the base of NPN transistor Q2, respectively. The emitters of Q1 and Q2 are grounded. The collector of Q2 is connected to one end of resistor R78 and UART5-RX, respectively. The other end of R78 is connected to +3.3V. Pin 1 of TLP521-1 chip U21 is connected to GPRS-PWR through resistor R83. Pin 2 of U21 is grounded. Pin 4 of U21 is connected to +3.3V. Pin 3 of U21 is connected to one end of resistor R84, one end of capacitor C67, and one end of resistor R85, respectively. The other end of R84 is connected to the other end of C67 and ground, respectively. The other end of R85 is connected to the base of NPN transistor Q5, and the emitter of Q5... The collector of Q5 is connected to PWR; the base of NPN transistor Q3 is connected to one end of resistor R79 and one end of resistor R80, the other end of R79 is connected to UART5-TX, the other end of R80 is connected to +3.3V and one end of resistor R81, the other end of R81 is connected to the collector of Q3 and the base of NPN transistor Q4, the emitters of Q3 and Q4 are grounded, the collector of Q4 is connected to one end of resistor R82 and USR-RX, the other end of R82 is connected to +2.8V; the base of NPN transistor Q6 is connected to G-LINK through resistor R86, the collector of Q6 is connected to LED1, resistor R87 is connected to +4V, one end of resistor R88, the other end of R88 is connected to LED1... LED2 is connected to the emitter of Q6 and ground respectively; pin 1 of P7 of MP2303 chip is connected to MP-BS, pin 2 of P7 is connected to the cathode of diode D11 and one end of resistor R89 respectively, the anode of D11 is connected to +15V, and the other end of R89 is connected to pin 7 of P7; pin 3 of P7 is connected to +4V, one end of capacitor C72, one end of inductor L13, one end of capacitor C73, one end of capacitor C74, and one end of resistor R90 respectively, the other end of C72 is connected to MP-BS and the cathode of diode D12 respectively, the anode of D12 is connected to the other end of L13, the other end of R90 is connected to pin 5 of P7 and one end of resistor R91 respectively, the other end of R91 is connected to ground and one end of resistor R92 respectively, and the other end of R92 is connected to pin 6 of P7 through capacitor C75.