CN222366273U - Photovoltaic data acquisition device based on broadband PLC communication - Google Patents
Photovoltaic data acquisition device based on broadband PLC communication Download PDFInfo
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Abstract
本实用新型提供了一种基于宽带PLC通信的光伏数据采集装置，其仅需2根电源线即可完成南向数据采集，且不再受安装位置的局限，避免重复布线，减少成本；包括：电源电路，用于将逆变器或外部电源的电压转换为供电所需的直流电压；PLC耦合电路，连接交流电力线，用于将交流电力线上的PLC信号进行隔离和耦合输出；PLC收发电路，与所述电源电路、PLC耦合电路均相连接，用于接收经隔离和耦合后的PLC信号，实现PLC载波通信；WiFi无线电路，与所述电源电路、PLC收发电路均相连接，用于实现北向数据无线交互。
The utility model provides a photovoltaic data acquisition device based on broadband PLC communication, which only needs two power lines to complete southbound data acquisition and is no longer limited by the installation position, thus avoiding repeated wiring and reducing costs; the utility model comprises: a power supply circuit, which is used to convert the voltage of an inverter or an external power supply into a DC voltage required for power supply; a PLC coupling circuit, which is connected to an AC power line and is used to isolate and couple the PLC signal on the AC power line for output; a PLC transceiver circuit, which is connected to both the power supply circuit and the PLC coupling circuit and is used to receive the PLC signal after isolation and coupling to realize PLC carrier communication; a WiFi wireless circuit, which is connected to both the power supply circuit and the PLC transceiver circuit and is used to realize wireless interaction of northbound data.
Description
Technical Field
The utility model belongs to the technical field of photovoltaic data acquisition, and particularly relates to a photovoltaic data acquisition device based on broadband PLC communication.
Background
The current photovoltaic data acquisition equipment is generally realized by a circuit which is mainly in a southbound acquisition mode, such as RS485, RS232, uart TTL, USB and other digital acquisition modes, the northbound data uploading mode is mainly in a wireless connection mode such as CAT-1 (4G), wiFi and the like, and the southbound acquisition interfaces such as RS485, RS232, uart TTL and USB which are conventional have commonality, namely, the data wires corresponding to the interfaces are needed, and the acquired equipment (such as an inverter, a micro-inverter and an energy storage device) is also needed to specially provide two power wires for supplying power for the photovoltaic data acquisition equipment, so that the photovoltaic data acquisition equipment is connected with the acquired equipment such as the inverter, at least the photovoltaic data acquisition equipment is needed to contain more than 4 independent cables including data wires and power wires, the photovoltaic data acquisition equipment can be limited by the length of the connecting cables, the application scene is limited only by being placed nearby around the acquired equipment such as the inverter, but the acquired equipment such as the inverter is located in a position which is far away, the CAT-1 (4G) signal intensity is usually weak, and the cost of the CAT-1 (4G) signal is also needed to be more than the cost is increased due to the fact that the power wiring is needed to be repeated, and the cost of the power supply is more than the cost is increased.
Disclosure of utility model
Aiming at the problems, the utility model provides a photovoltaic data acquisition device based on broadband PLC communication, which can complete southward data acquisition by only 2 power lines, is not limited by installation positions, avoids repeated wiring and reduces cost.
The utility model adopts the following technical scheme that the photovoltaic data acquisition device based on broadband PLC communication comprises a power supply circuit, a power supply circuit and a power supply circuit, wherein the power supply circuit is used for converting the voltage of an inverter or an external power supply into direct-current voltage required by power supply;
The PLC coupling circuit is connected with the alternating current power line and used for isolating and coupling out PLC signals on the alternating current power line;
The PLC transceiver circuit is connected with the power supply circuit and the PLC coupling circuit and is used for receiving the isolated and coupled PLC signals and realizing PLC carrier communication;
And the WiFi wireless circuit is connected with the power supply circuit and the PLC transceiver circuit and is used for realizing wireless interaction of northbound data.
Further, the power supply circuit comprises an AC/DC power supply module J1, capacitors C1-C5, inductors L1 and L2, a diode D1, resistors R1-R8 and DCDC chips U1 and U2, wherein the DCDC chips U1 and U2 are model MP1470 chips, and the AC/DC power supply module J1 is model AP12N03-Zero chips; the 2 pin of the AC/DC power supply module J1 is connected with one end of the capacitor C1, and the 1 pin of the AC/DC power supply module J1 is connected with the other end of the capacitor C1; the pin 3 of the AC/DC power supply module J1 is connected with one end of the capacitors C2 and C3 and the cathode of the diode D1, the connected connection point is used as a voltage 12V output end, the pin 4 of the AC/DC power supply module J1 is connected with the other ends of the capacitors C2 and C3 and the anode of the diode D1 and then grounded, the pin 3 of the DCDC chip U1 is connected with one end of the resistor R1 and then connected with the voltage 12V, the pin 6 of the DCDC chip U1 is connected with one end of the capacitor C4, the pin 2 of the DCDC chip U1 is connected with the other end of the capacitor C4 and one end of the inductor L1, the pin 4 of the DCDC chip U1 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with one end of the resistors R3 and R4, the other end of the resistor R4 is grounded, the resistor R3 is connected with the other end of the inductor L1, the connected connection point is used as a voltage 3, the pin 6 of the DCDC chip U1 is connected with one end of the capacitor C2 and one end of the capacitor C2, the pin 5 of the DCDC chip U2 is connected with the other end of the capacitor C2 and the capacitor C2 is connected with the other end of the capacitor C5, the pin 4 of the DCDC chip U2 is connected with one end of the resistor R6, the other end of the resistor R6 is connected with one ends of the resistors R7 and R8, and the other end of the resistor R8 is grounded;
Further, the PLC coupling circuit comprises a transformer T1, a fuse protector F1, a piezoresistor RV1, a capacitor C6, inductors L3 and L4, TSS protection pipes D2 and D3 and TVS pipes D4 and D5, wherein one end of the fuse protector F1 is connected with the L_IN end of an alternating current power line, one end of the piezoresistor RV1 is connected with the N_IN end of the alternating current power line, one end of the piezoresistor RV1 is also connected with one end of the inductor L4 and the TSS protection pipe D2 and the 7 pin of the transformer T1, the other end of the inductor L4 is connected with the 1 pin of the AC/DC power supply module J1, the other end of the fuse protector F1 is connected with the other end of the piezoresistor RV1, one end of the capacitor C6 and one end of the inductor L3, the other end of the inductor L3 is connected with the 2 pin of the AC/DC power supply module J1, the other end of the capacitor C6 is connected with the other end of the TSS protection pipe D2, the 8 pin of the transformer T1 is connected with the other end of the TSS protection pipe T1, and the other end of the TVS protection pipe is connected with the TVS 4;
Further, the PLC transceiver circuit comprises a PLC carrier communication chip U3, the PLC carrier communication chip U3 is a model S222T-ISF chip, pins 1 and 2 of the LC carrier communication chip U3 are respectively and correspondingly connected with pins 4 and 6 of the transformer T1, pin 4 of the LC carrier communication chip U3 is connected with voltage 3.3V, and pin 17 of the LC carrier communication chip U3 is connected with voltage 7V;
Further, the WiFi wireless circuit comprises a wireless module U4 and resistors R9 and R10, wherein the wireless module U4 is a model LPT270 chip, a 4 pin of the wireless module U4 is connected with a 22 pin of the PLC carrier communication chip U3, a 13 pin of the wireless module U4 is connected with a 5 pin of the DCDC chip U2, one end of the resistor R9 is connected with the 5 pin of the PLC carrier communication chip U3, one end of the resistor R10 is connected with a 6 pin of the PLC carrier communication chip U3, the other ends of the resistors R9 and R10 are correspondingly connected with the 5 pin and the 6 pin of the wireless module U4 respectively, and a 15 pin of the wireless module U4 is connected with a voltage of 3.3V.
The utility model has the beneficial effects that when the device is connected with the acquired equipment such as an inverter, the device can finish the south data acquisition only by correspondingly connecting the power supply circuit and the PLC coupling circuit through two power lines, namely, the two power lines can supply power to the photovoltaic data acquisition device and are also channels for data transmission, so that the repeated wiring on site is avoided, the photovoltaic data acquisition device is not limited by the mounting position any more, and the device can be mounted at any interface position of the power supply channel of the existing wiring, thereby being capable of selecting a proper strong signal position and ensuring that CAT-1 (4G) or WiFi and other wireless modes are stably connected with a server, and having better economic use value.
Drawings
FIG. 1 is a block diagram of the structure of the present utility model;
FIG. 2 is a schematic circuit diagram of a power circuit of the present utility model;
FIG. 3 is a schematic circuit diagram of a PLC coupling circuit of the present utility model;
FIG. 4 is a schematic circuit diagram of a PLC transceiver circuit in accordance with the present utility model;
Fig. 5 is a circuit schematic of a WiFi radio circuit of the utility model.
Detailed Description
As shown in figures 1-5, the photovoltaic data acquisition device based on broadband PLC communication comprises a power supply circuit, a power supply circuit and a power supply circuit, wherein the power supply circuit is used for converting the voltage of an inverter or an external power supply into 7V and 3.3V direct current voltages required by power supply, 3.3V is used for supplying power to a WiFi radio circuit and an SoC part in a PLC transceiver circuit, and 7V is used for supplying power to a high gain LINE DRIVER in the PLC transceiver circuit;
The PLC coupling circuit is connected with the alternating current power line and is used for isolating and coupling out the PLC signals on the alternating current power line, namely, the PLC coupling circuit can couple the alternating current side power carrier signals to the PLC transceiver circuit;
The PLC transceiver circuit is connected with the power supply circuit and the PLC coupling circuit and is used for receiving the isolated and coupled PLC signals and realizing PLC carrier communication;
And the WiFi wireless circuit is connected with the power supply circuit and the PLC transceiver circuit and is used for realizing wireless interaction of northbound data.
The power supply circuit comprises an AC/DC power supply module J1, capacitors C1-C5, inductors L1 and L2, a diode D1, resistors R1-R8 and DCDC chips U1 and U2, wherein the DCDC chips U1 and U2 adopt model MP1470 chips, and the AC/DC power supply module J1 adopts model AP12N03-Zero chips; the pin 2 of the AC/DC power supply module J1 is connected with one end of the capacitor C1, and the pin 1 of the AC/DC power supply module J1 is connected with the other end of the capacitor C1; the 3 pin of the AC/DC power supply module J1 is connected with one end of the capacitor C2 and one end of the capacitor C3 and the cathode of the diode D1, and the connected connection point is used as a voltage 12V output end; the pin 4 of the AC/DC power supply module J1 is connected with the other ends of the capacitors C2 and C3 and the positive electrode of the diode D1 and then grounded, the pin 3 of the DCDC chip U1 is connected with one end of the resistor R1 and then connected with the voltage 12V, the pin 6 of the DCDC chip U1 is connected with one end of the capacitor C4, the pin 2 of the DCDC chip U1 is connected with the other end of the capacitor C4 and one end of the inductor L1, the pin 4 of the DCDC chip U1 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with one end of the resistor R3 and one end of the resistor R4, the other end of the resistor R4 is grounded, the connected connection point serving as an output end of the voltage 3.3V, the pin 3 of the DCDC chip U2 is connected with the voltage 12V, one end of the resistor R5 is connected with the pin 5 of the DCDC chip U2, one end of the pin 6 of the resistor R5 is grounded, the pin 2 of the DCDC chip U2 is connected with one end of the capacitor C5, the pin 2 of the other end of the resistor C2 is connected with one end of the capacitor C5, the other end of the inductor L2, the other end of the resistor L2 is connected with the resistor R7 and the other end of the resistor R8 is connected with the resistor R8, and the other end of the resistor 8 is connected with the resistor R8 uniformly, and the connected connection point serves as a voltage 7V output.
The PLC coupling circuit comprises a transformer T1, a fuse protector F1, a piezoresistor RV1, a capacitor C6, inductors L3 and L4, TSS protection tubes D2 and D3 and TVS tubes D4 and D5; a 400uH 1:1 signal transformer used for the transformer T1; one end of the fuse protector F1 is connected with the L_IN end of the alternating current power line, one end of the piezoresistor RV1 is connected with the N_IN end of the alternating current power line, one end of the piezoresistor RV1 is also connected with one end of the inductor L4 and one end of the TSS protection tube D2 and 7 pins of the transformer T1, the other end of the inductor L4 is connected with 1 pin of the AC/DC power module J1, the other end of the fuse protector F1 is connected with the other end of the piezoresistor RV1, one end of the capacitor C6 and one end of the inductor L3, the other end of the inductor L3 is connected with 2 pin of the AC/DC power module J1, the other end of the capacitor C6 is connected with the other end of the TSS protection tube D3 and one end of the TVS tube D5, and the other end of the TVS tube D4 and D5 are connected with the other end of the TSS protection tube D3 and then grounded; the L_IN and N_IN ends are contacts connected with an alternating current power grid, the L_OUT and N_OUT are signals isolated from the L_IN and N_IN ends through the inductors L3 and L4, the L_OUT and N_OUT provide ACDC conversion power for a system power supply network (namely a power supply circuit), and the inductors L3 and L4 are used for isolating the system power supply network and a PLC coupling signal channel (power grid) so as to reduce electromagnetic interference.
The PLC receiving and transmitting circuit comprises a PLC carrier communication chip U3, the PLC carrier communication chip U3 adopts a model S222T-ISF chip, pins 1 and 2 of the LC carrier communication chip U3 are respectively and correspondingly connected with pins 4 and 6 of a transformer T1, the pin 4 of the LC carrier communication chip U3 is connected with voltage 3.3V, and the pin 17 of the LC carrier communication chip U3 is connected with voltage 7V.
The WiFi wireless circuit comprises a wireless module U4, resistors R9 and R10, wherein the wireless module U4 adopts a model LPT270 chip, the 4 pin of the wireless module U4 is connected with the 22 pin of the PLC carrier communication chip U3, the 13 pin of the wireless module U4 is connected with the 5 pin of the DCDC chip U2, one end of the resistor R9 is connected with the 5 pin of the PLC carrier communication chip U3, one end of the resistor R10 is connected with the 6 pin of the PLC carrier communication chip U3, the other ends of the resistors R9 and R10 are correspondingly connected with the 5 pin and the 6 pin of the wireless module U4 respectively, and the 15 pin of the wireless module U4 is connected with the voltage of 3.3V.
The working principle of the utility model is that the voltage on the power line of the inverter or the external power supply is firstly converted into 12V direct current through the AC/DC power module J1, and then is converted into 7V and 3.3V direct current voltage required by the system through two independent DCDC chips (U1 and U2), wherein 3.3V is used for supplying power to the wifi wireless circuit and the SoC part in the PLC transceiver circuit. Meanwhile, an alternating current power line is firstly led into an AC-N, AC-L pin of an AC/DC power module J1 in a power supply circuit through a fuse protector F1 and a piezoresistor RV1 by one branch through inductors L3 and L4 for isolating PLC signals and a power supply, and the other branch enters a transformer T1 through a capacitor C6 and a TSS protection tube D2, the transformer T1 isolates and couples the PLC signals on a power line, PLCP+ and PLCN-pins on the PLC power receiving and generating circuit are connected with a secondary stage of the transformer T1 in a PLC coupling circuit, and the PLC power receiving and transmitting circuit is connected with a serial port of a WiFi radio circuit to realize northbound data interaction.
In the utility model, the collected equipment such as a photovoltaic data collecting device and an inverter can complete the function of south data collection by only needing 2 power lines, the two power lines can supply power to the photovoltaic data collecting device and are also channels for data transmission, so that the repeated wiring on site is avoided, the wiring cost and the site construction labor cost are reduced, meanwhile, the photovoltaic data collecting device is not limited by the installation position any interface position of the existing wiring power channel, the photovoltaic data collecting device based on PLC (power carrier) communication can be installed, thereby selecting a proper strong signal position, enabling CAT-1 (4G) or WiFi and other wireless modes to be stably connected with a server, improving the stability and reliability of photovoltaic data collection, and in addition, the utility model realizes the broadband PLC power carrier through a PLC transceiving circuit, the working frequency band of which is less than 12MHz, and the power noise of electrical equipment basically distributed near 100KHZ is avoided, thus having good anti-interference capability.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (5)
1. The photovoltaic data acquisition device based on broadband PLC communication is characterized by comprising a power supply circuit, a power supply circuit and a power supply circuit, wherein the power supply circuit is used for converting the voltage of an inverter or an external power supply into direct-current voltage required by power supply;
The PLC coupling circuit is connected with the alternating current power line and used for isolating and coupling out PLC signals on the alternating current power line;
The PLC transceiver circuit is connected with the power supply circuit and the PLC coupling circuit and is used for receiving the isolated and coupled PLC signals and realizing PLC carrier communication;
And the WiFi wireless circuit is connected with the power supply circuit and the PLC transceiver circuit and is used for realizing wireless interaction of northbound data.
2. The photovoltaic data acquisition device based on broadband PLC communication according to claim 1, wherein the power supply circuit comprises an AC/DC power supply module J1, capacitors C1-C5, inductors L1 and L2, a diode D1, resistors R1-R8 and DCDC chips U1 and U2, the DCDC chips U1 and U2 are model MP1470 chips, and the AC/DC power supply module J1 is model AP12N03-Zero chips; the pin 2 of the AC/DC power supply module J1 is connected with one end of the capacitor C1, the pin 1 of the AC/DC power supply module J1 is connected with the other end of the capacitor C1, the pin 3 of the AC/DC power supply module J1 is connected with one end of the capacitor C2 and C3 and the negative electrode of the diode D1, the connected connection point is used as an output end of the voltage 12V, the pin 4 of the AC/DC power supply module J1 is connected with the other end of the capacitor C2 and C3 and the positive electrode of the diode D1 and then grounded, the pin 3 of the DCDC chip U1 is connected with one end of the resistor R1 and then connected with the voltage 12V, the pin 6 of the DCDC chip U1 is connected with one end of the capacitor C4, the pin 2 of the DCDC chip U1 is connected with the other end of the capacitor C4 and one end of the inductor L1, the pin 4 of the resistor U1 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with the other end of the resistor R3 and the resistor R4 is connected with the other end of the resistor R5, the other end of the resistor R2 is connected with the resistor R5, and the other end of the resistor R3 is connected with the resistor R5 is connected with the end of the resistor R5, the two ends of the capacitor C5 and the inductor L2 are connected with each other, the two ends of the resistor R6 are connected with one end of the resistor R7 and one end of the resistor R8, the other end of the resistor R8 is grounded, the resistor R7 is connected with the other end of the inductor L2, and the connected connection point is used as a voltage 7V output end.
3. The photovoltaic data collecting device based on broadband PLC communication according to claim 2, wherein the PLC coupling circuit comprises a transformer T1, a fuse protector F1, a piezoresistor RV1, a capacitor C6, inductors L3, L4, and TSS protection tubes D2, D3, and TVS tubes D4, D5, one end of the fuse protector F1 is connected to the l_in end of the AC power line, one end of the piezoresistor RV1 is connected to the n_in end of the AC power line, one end of the piezoresistor RV1 is further connected to one end of the inductor L4 and TSS protection tube D2, the 7-pin of the transformer T1 is connected to the 1-pin of the AC/DC power module J1, the other end of the fuse protector F1 is connected to the other end of the piezoresistor RV1, one end of the capacitor C6, one end of the inductor L3 is connected to the 2-pin of the AC/DC power module J1, the other end of the resistor C6 is connected to the other end of the TSS protection tube T1, the other end of the inductor L3 is connected to the TVS protection tube D4, and the other end of the TVS protection tube T4 is connected to the other end of the TVS 4, and the other end of the transformer is connected to the TVS 4 is connected to the other end of the TVS protection tube.
4. The photovoltaic data collecting device based on broadband PLC communication according to claim 3, wherein the PLC transceiver circuit comprises a PLC carrier communication chip U3, the PLC carrier communication chip U3 is a model S222T-ISF chip, pins 1 and 2 of the LC carrier communication chip U3 are respectively and correspondingly connected with pins 4 and 6 of the transformer T1, pin 4 of the LC carrier communication chip U3 is connected with voltage 3.3V, and pin 17 of the LC carrier communication chip U3 is connected with voltage 7V.
5. The photovoltaic data acquisition device based on broadband PLC communication according to claim 4, wherein the WiFi wireless circuit comprises a wireless module U4 and resistors R9 and R10, the wireless module U4 is a model LPT270 chip, the 4 pin of the wireless module U4 is connected with the 22 pin of the PLC carrier communication chip U3, the 13 pin of the wireless module U4 is connected with the 5 pin of the DCDC chip U2, one end of the resistor R9 is connected with the 5 pin of the PLC carrier communication chip U3, one end of the resistor R10 is connected with the 6 pin of the PLC carrier communication chip U3, the other ends of the resistors R9 and R10 are correspondingly connected with the 5 pin and the 6 pin of the wireless module U4 respectively, and the 15 pin of the wireless module U4 is connected with a voltage of 3.3V.
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