Three-phase PLC carrier communication split-phase control device

Abstract

The invention provides a three-phase PLC carrier communication split-phase control device, and belongs to the technical field of PLC carrier communication. The three-phase PLC carrier communication split-phase control device comprises a commercial power supply device, a concentrator, an A-phase power line, a B-phase power line, a C-phase power line, an N-phase power line, a carrier communication unit and a first controller. A first concentrator sends corresponding communication data to a first communication module, a second communication module and a third communication module through an A-phase power line, a B-phase power line and a C-phase power line, and a first controller can control connection / disconnection of the A-phase power line, the B-phase power line and the C-phase power line. When the three-phase PLC carrier wave communication split-phase control device is used, one or two of the three-phase power lines can be disconnected according to control requirements, only one or two communication modules are left to receive corresponding communication data, the situation that interference occurs when the three communication modules receive the three-phase communication data at the same time is avoided, and three-phase PLC carrier wave communication split-phase control is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of PLC carrier communication, and in particular to a three-phase PLC carrier communication phase-splitting control device. Background Art

[0002] As PLC carrier communication is increasingly widely used in power systems, the requirements for PLC carrier communication are also getting higher and higher. Among them, the demand for three-phase PLC carrier communication phase-by-phase communication is also increasing. This communication method plays a key role in phase identification, the quality of carrier communication in each phase, and cross-phase communication analysis. At present, most general electrical appliances transmit data to the first concentrator in the distribution room through one-phase or three-phase power lines, and the first concentrator then processes the data and uploads it to the system. As PLC carrier communication is increasingly widely used in power systems, more and more communication appliances are connected to the power system, and the load in the power system is getting larger and larger. In the existing three-phase PLC carrier communication system, the concentrator sends the three-phase communication data to the corresponding communication appliances through the three-phase power lines. Since the first communication appliance is connected to the A-phase power line, the B-phase power line, and the C-phase power line respectively, and the second communication appliance is connected to the A-phase power line, when the first communication appliance communicates with the first concentrator, the first communication appliance will absorb the signal on the second communication appliance and interfere with the communication. For residents' homes, there are many electrical devices, and the power supplies in different electrical devices will also interfere with PLC carrier communication to a certain extent. Therefore, in real life environments, many communication appliances can communicate normally, while others cannot. Some communication appliances may sometimes communicate and sometimes not, resulting in poor carrier communication effects. Summary of the invention

[0003] The purpose of the present invention is to provide a three-phase PLC carrier communication phase-splitting control device in view of the above-mentioned deficiencies in the prior art.

[0004] The present invention proposes a three-phase PLC carrier communication phase-splitting control device, comprising a first AC power supply device, a first concentrator, an A-phase power line, a B-phase power line, a C-phase power line, an N-phase power line, a carrier communication unit, and a first controller, wherein one end of the A-phase power line, one end of the B-phase power line, one end of the C-phase power line, and one end of the N-phase power line are respectively connected to the first AC power supply device, the first concentrator is respectively connected to the A-phase power line, the B-phase power line, the C-phase power line, and the N-phase power line, and the first controller is respectively connected to the A-phase power line, the B-phase power line, the C-phase power line, and the N-phase power line; the carrier communication unit comprises The first communication module, the second communication module, and the third communication module, the first communication module is respectively connected to the A-phase power line, the B-phase power line, the C-phase power line, and the N-phase power line, the second communication module is respectively connected to the A-phase power line and the N-phase power line, and the third communication module is respectively connected to the B-phase power line and the N-phase power line, the first concentrator is used to send corresponding communication data to the first communication module, the second communication module, and the third communication module through the A-phase power line, the B-phase power line, and the C-phase power line respectively; the first controller can control the conduction / disconnection of the A-phase power line, the B-phase power line, and the C-phase power line respectively.

[0005] Furthermore, it also includes a first relay Relay1, a second relay Relay2, and a third relay Relay3; the first relay Relay1 is used to control the on / off of the A-phase power line; the second relay Relay2 is used to control the on / off of the B-phase power line; the third relay Relay3 is used to control the on / off of the C-phase power line; the first controller can control the on / off of the first relay Relay1, the second relay Relay2, and the third relay Relay3 respectively.

[0006] Furthermore, the first controller includes an MCU module and a power module for receiving the first electric energy from the first AC power supply device and providing the second electric energy to the MCU module. The MCU module can control the on / off of the first relay Relay1, the second relay Relay2, and the third relay Relay3 respectively.

[0007] Furthermore, the power module is an ACDC power module.

[0008] Furthermore, it also includes a first control circuit connected to the first relay Relay1, a second control circuit connected to the second relay Relay2, and a third control circuit connected to the third relay Relay3; the MCU module controls the first relay Relay1 to be turned on / off by controlling the level signal at the input end of the first control circuit; the MCU module controls the second relay Relay2 to be turned on / off by controlling the level signal at the input end of the second control circuit; the MCU module controls the third relay Relay3 to be turned on / off by controlling the level signal at the input end of the third control circuit.

[0009] Further, the MCU module controls the input end RECON1 of the first control circuit to a high level, so that the first relay Relay1 is disconnected, and the MCU module controls the input end RECON1 of the first control circuit to a low level, so that the first relay Relay1 is closed; the MCU module controls the input end RECON2 of the second control circuit to a high level, so that the second relay Relay2 is disconnected, and the MCU module controls the input end RECON2 of the second control circuit to a low level, so that the second relay Relay2 is closed; the MCU module controls the input end RECON3 of the third control circuit to a high level, so that the third relay Relay3 is disconnected, and the MCU module controls the input end RECON3 of the third control circuit to a low level, so that the third relay Relay3 is closed.

[0010] Furthermore, the first relay Relay1, the second relay Relay2, and the third relay Relay3 are all monostable, normally open relays.

[0011] Furthermore, the first control circuit includes a resistor RP1, a resistor RP4, a transistor QP1, a diode DP13, a capacitor CP25, and a first circuit power supply, one end of the resistor RP1 is connected to the input end RECON1, and the other end is connected to the base of the transistor QP1, the emitter of the transistor QP1 is connected to the ground, one end of the resistor RP4 is connected to the base of the transistor QP1, and the other end is connected to the ground, the collector of the transistor QP1 is connected to the positive electrode of the diode DP13, the negative electrode of the diode DP13 is respectively connected to one end of the capacitor CP25 and the first circuit power supply, the other end of the capacitor CP25 is connected to the ground, and one end of the first relay Relay1 is connected to the collector of the transistor QP1, and the other end is connected to the negative electrode of the diode DP13.

[0012] Furthermore, the second control circuit includes a resistor RP5, a resistor RP6, a transistor QP2, a diode DP14, a capacitor CP26, and a second circuit power supply, one end of the resistor RP5 is connected to the input end RECON2, and the other end is connected to the base of the transistor QP2, the emitter of the transistor QP2 is connected to the ground, one end of the resistor RP6 is connected to the base of the transistor QP2, and the other end is connected to the ground, the collector of the transistor QP2 is connected to the positive electrode of the diode DP14, the negative electrode of the diode DP14 is respectively connected to one end of the capacitor CP26 and the second circuit power supply, the other end of the capacitor CP26 is connected to the ground, and one end of the second relay Relay2 is connected to the collector of the transistor QP2, and the other end is connected to the negative electrode of the diode DP14.

[0013] Furthermore, the third control circuit includes a resistor RP8, a resistor RP9, a transistor QP3, a diode DP15, a capacitor CP27, and a third circuit power supply. One end of the resistor RP8 is connected to the input end RECON3, and the other end is connected to the base of the transistor QP3. The emitter of the transistor QP3 is connected to the ground. One end of the resistor RP9 is connected to the base of the transistor QP3, and the other end is connected to the ground. The collector of the transistor QP3 is connected to the positive electrode of the diode DP15. The negative electrode of the diode DP15 is respectively connected to one end of the capacitor CP27 and the third circuit power supply. The other end of the capacitor CP27 is connected to the ground. One end of the third relay Relay3 is connected to the collector of the transistor QP3, and the other end is connected to the negative electrode of the diode DP15.

[0014] The three-phase PLC carrier communication phase-splitting control device of the present invention has the following beneficial effects: The first concentrator sends the corresponding communication data to the first communication module, the second communication module and the third communication module through the A-phase power line, the B-phase power line and the C-phase power line respectively. The first controller can control the on / off of the A-phase power line, the B-phase power line and the C-phase power line respectively. One or two of the three-phase power lines can be disconnected according to control requirements, leaving only one or two communication modules to receive the corresponding communication data, thereby avoiding interference caused by the three communication modules receiving the three-phase communication data at the same time, and realizing the three-phase PLC carrier communication phase control. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments of the present invention and are used together with the description to explain the principles of the present invention. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present invention, but not all embodiments. For those of ordinary skill in the art, other drawings can be obtained from these drawings without paying creative work.

[0016] Figure 1 A principle block diagram of a three-phase PLC carrier communication phase-splitting control device according to an embodiment of the present invention; Figure 2 A circuit diagram of a three-phase PLC carrier communication phase-splitting control device when a first control circuit and a first relay Relay1 are connected in an embodiment of the present invention; Figure 3 A circuit diagram of a three-phase PLC carrier communication phase-splitting control device in which a second control circuit is connected to a second relay Relay2 in an embodiment of the present invention; Figure 4 A circuit diagram of a three-phase PLC carrier communication phase-splitting control device when a first control circuit and a first relay Relay1 are connected in an embodiment of the present invention; Figure 5 It is a schematic diagram of a three-phase PLC carrier communication phase-splitting control device in an embodiment of the present invention; Figure 6 It is a schematic diagram of a three-phase PLC carrier communication device in the prior art.

[0017] In the figure, 1-the first AC power supply device, 11-the first transformer, 12-the first low-voltage distribution room main switch cabinet, 13-the first low-voltage distribution room capacitor cabinet, 2-the first controller, 21-MCU module, 22-ACDC power supply module, 3-carrier communication unit, 31-the first communication module, 32-the second communication module, 33-the third communication module, 4-the first concentrator, 5-the second AC power supply device, 51-the second transformer, 52-the second low-voltage distribution room main switch cabinet, 53-the second low-voltage distribution room capacitor cabinet, 6-the second concentrator, 71-the fourth communication module, 72-the fifth communication module, 73-the sixth communication module. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other arbitrarily without conflict.

[0019] See also Figure 1-6 A three-phase PLC carrier communication phase-splitting control device according to an embodiment of the present invention comprises a first AC power supply device 1, a first concentrator 4, an A-phase power line, a B-phase power line, a C-phase power line, an N-phase power line, a carrier communication unit 3, and a first controller 2, wherein one end of the A-phase power line, one end of the B-phase power line, one end of the C-phase power line, and one end of the N-phase power line are respectively connected to the first AC power supply device 1, the first concentrator 4 is respectively connected to the A-phase power line, the B-phase power line, the C-phase power line, and the N-phase power line, and the first controller 2 is respectively connected to the A-phase power line, the B-phase power line, the C-phase power line, and the N-phase power line; the carrier communication unit 3 comprises a first communication Module 31, a second communication module 32, and a third communication module 33. The first communication module 31 is respectively connected to the A-phase power line, the B-phase power line, the C-phase power line, and the N-phase power line. The second communication module 32 is respectively connected to the A-phase power line and the N-phase power line. The third communication module 33 is respectively connected to the B-phase power line and the N-phase power line. The first concentrator 4 is used to send corresponding communication data to the first communication module 31, the second communication module 32, and the third communication module 33 through the A-phase power line, the B-phase power line, and the C-phase power line respectively; the first controller 2 can control the conduction / disconnection of the A-phase power line, the B-phase power line, and the C-phase power line respectively.

[0020] Specifically, the user writes corresponding control instructions according to the control requirements, and the first controller 2 controls the on / off of the A-phase power line, the B-phase power line, and the C-phase power line according to the control instructions, so that the sending or stopping of the corresponding communication data on the power line can be controlled. The first controller 2 can control one or two of the A-phase power line, the B-phase power line, and the C-phase power line to be disconnected, and only keep one or two connected. Then the first concentrator 4 sends communication data through two-phase power lines at most, and only two communication modules receive communication data at most. Compared with sending communication data to three communication modules through three-phase power lines, the interference between communication modules on different phases in the present application is smaller, thereby realizing three-phase PLC carrier communication phase control.

[0021] Specifically, the first controller 2 controls the A-phase power line to be disconnected, the B-phase power line to be turned on, and the C-phase power line to be turned on. At this time, the first communication module 31 can receive the communication data transmitted by the B-phase power line and the C-phase power line respectively, the second communication module 32 is disconnected, and the third communication module 33 can receive the communication data transmitted by the B-phase power line; the first controller 2 controls the A-phase power line to be disconnected, the C-phase power line to be disconnected, and the B-phase power line to be turned on. At this time, the first communication module 31 and the third communication module 33 can receive the communication data transmitted by the B-phase power line respectively; the first controller controls the A-phase power line to be disconnected, the B-phase power line to be disconnected, and the C-phase power line to be turned on. line is conductive, the first communication module 31 receives the communication data transmitted by the C-phase power line; compared with the prior art in which three communication modules receive three-phase data at the same time, the present application can perform phase control on the three-phase PLC carrier communication to reduce interference between different communication modules; the first controller 2 controls two of the A-phase power line, the B-phase power line, and the C-phase power line to be disconnected and one to be connected, so as to survey the communication quality on the phase where the conductive communication module is located, thereby accurately surveying the carrier communication quality on each phase on site, giving certain guidance on the installation of communication equipment, and providing data support for solving the poor carrier communication effect on site.

[0022] For details, see Figure 6 In the prior art, the existing three-phase PLC carrier communication device includes a second mains power supply device 5, a second concentrator 6, a fourth communication module 71, a fifth communication module 72, a sixth communication module 73, an A-phase power line, a B-phase power line, a C-phase power line, and an N-phase power line. The first mains power supply device 1 includes a 10KV power grid, a second transformer 51, a second low-voltage distribution room main switch cabinet 52, and a second low-voltage distribution room capacitor cabinet 53. The rated capacity of the second transformer 51 is 630kva, and the model of the second low-voltage distribution room capacitor cabinet 53 is BZMJ. 0.45-25-3, the second concentrator 6 can be a low-voltage distribution room concentrator, the 10KV power grid transmits electric energy to the three-phase line through the second transformer 51, the second low-voltage distribution room main switch cabinet 52, and the second low-voltage distribution room capacitor cabinet 53 in sequence, the second concentrator 6 is respectively connected to the A-phase power line, the B-phase power line, the C-phase power line, and the N-phase power line, the fourth communication module 71 can be a fourth communication appliance, the fifth communication module 72 can be a fifth communication appliance, and the sixth communication module 73 can be a sixth communication appliance. When the fifth communication module 72 communicates with the second concentrator 6, the fourth communication module 71 will absorb the signal on the fifth communication module 72 and interfere with the communication.

[0023] For details, see Figure 5The first city power supply device 1 may include a 10KV power grid, a first transformer 11, a first low-voltage distribution room main switch cabinet 12, and a first low-voltage distribution room capacitor cabinet 13. The rated capacity of the first transformer 11 is 630kva, and the model of the first low-voltage distribution room capacitor cabinet 13 is BZMJ 0.45-25-3. The first concentrator 4 may be a low-voltage distribution room concentrator. The 10KV power grid sequentially transmits electric energy to a three-phase line including an A-phase power line, a B-phase power line, and a C-phase power line through the first transformer 11, the first low-voltage distribution room main switch cabinet 12, and the first low-voltage distribution room capacitor cabinet 13. The second concentrator 6 is respectively connected to the A-phase power line, the B-phase power line, the C-phase power line, and the N-phase power line. The first communication module 31 may be a first communication appliance, the second communication module 32 may be a second communication appliance, and the third communication module 33 may be a third communication appliance. In the present application, the first controller 2 is connected to the first preset location of the three-phase line, and the first controller 2 can help the user to perform data analysis on the communication environment of the location. The three communication modules need to be connected to the N-phase power line respectively. 1. The communication module cannot be powered on without adding the N-phase. 2. The communication data is a waveform on the voltage. Without adding the N-phase, there is no reference voltage. Carrier communication is data on the power line. In principle, data can be received and sent as long as there is a physical connection. The first controller 2 is connected to the A-phase power line, the B-phase power line, the C-phase power line, and the N-phase power line respectively. That is, the first controller 2 is added to the ABCN phases. In principle, the first controller 2 can receive all the data on the power line, and the first controller 2 can communicate with all devices on the power line.

[0024] As a three-phase PLC carrier communication phase-split control device in this embodiment, it can also include a first relay Relay1, a second relay Relay2, and a third relay Relay3; the first relay Relay1 is used to control the conduction / disconnection of the A phase power line; the second relay Relay2 is used to control the conduction / disconnection of the B phase power line; the third relay Relay3 is used to control the conduction / disconnection of the C phase power line; the first controller 2 can control the conduction / disconnection of the first relay Relay1, the second relay Relay2, and the third relay Relay3 respectively.

[0025] The first controller 2 may include an MCU module 21 and a power module for receiving the first power from the first AC power supply device 1 and providing the second power to the MCU module 21. The MCU module 21 may control the on / off of the first relay Relay1, the second relay Relay2, and the third relay Relay3 respectively.

[0026] The power module may be an ACDC power module 22 .

[0027] For details, see Figure 1The first AC power supply device 1 is respectively connected to the A-phase power line, the B-phase power line, the C-phase power line, and the N-phase power line, and also includes a fourth relay for controlling the N-phase power line, and sends UA, UB, UC, and UN signals to each phase circuit relay, and each circuit relay sends UA_PLC, UB_PLC, UC_PLC, and UN_PLC signals to the carrier communication unit 3, the first communication module 31 is respectively connected to the A-phase power line, the B-phase power line, the C-phase power line, and the N-phase power line, the second communication module 32 is respectively connected to the A-phase power line and the N-phase power line, and the third communication module 33 They are respectively connected to the B-phase power line and the N-phase power line; when the A-phase power line, the B-phase power line, the C-phase power line and the N-phase power line are all turned on, the first relay Relay1 sends the UA_PLC signal to the first communication module 31 and the second communication module 32, the second relay Relay2 sends the UB_PLC signal to the first communication module 31 and the third communication module 33, the third relay Relay3 sends the UC_PLC signal to the first communication module 31, and the fourth relay sends the UN_PLC signal to the first communication module 31, the second communication module 32 and the third communication module 33 respectively.

[0028] As a three-phase PLC carrier communication phase-split control device in this embodiment, it can also include a first control circuit connected to the first relay Relay1, a second control circuit connected to the second relay Relay2, and a third control circuit connected to the third relay Relay3; the MCU module 21 controls the first relay Relay1 to be turned on / off by controlling the level signal at the input end of the first control circuit; the MCU module 21 controls the second relay Relay2 to be turned on / off by controlling the level signal at the input end of the second control circuit; the MCU module 21 controls the third relay Relay3 to be turned on / off by controlling the level signal at the input end of the third control circuit.

[0029] Specifically, the first controller 2 has a powerful MCU module 21, which can handle a large number of tasks, effectively control various important unit modules, accurately analyze the collected signals, and should also have long-term access to the power system, and draw power from the first AC power supply device 1 through the ACDC power supply module 22 and supply power to the MCU module 21. The user can set some specific operation requirements, and set control instructions to the first controller 2 according to the operation requirements. The first controller 2 controls the on / off of the first communication module 31, the second communication module 32, and the third communication module 33 according to the control instructions. 1. All three relays are closed, and the carrier communication unit 3 communicates; 2. All three relays are disconnected, and the carrier communication unit 3 communicates; 3. The first relay Relay1 is closed, the second relay Relay2 and the third relay Relay3 are disconnected, and the first communication module 31 communicates; 4. The second relay Relay2 is closed, the first relay Relay1 and the third relay Relay3 are disconnected, and the second communication module 32 communicates; 5. The third relay Relay3 is closed, the first relay Relay1 and the second relay Relay2 are disconnected, and the third communication module 33 communicates; 6. The first relay Relay1 and the second relay Relay2 are closed, the third relay Relay3 is disconnected, and the first communication module 31 and the second communication module 32 communicate; 7. The first relay Relay1 and the third relay Relay3 are closed, the second relay Relay2 is disconnected, and the first communication module 31 and the third communication module 33 communicate; 8. The second relay Relay2 and the third relay Relay3 are closed, the first relay Relay1 is disconnected, and the second communication module 32 and the third communication module 33 communicate. After repeated cycles of operation, the communication signal quality LQI is read, and after a large amount of data analysis, it can be known whether the location can meet the carrier requirements and which phase can meet the carrier requirements. Then, by changing different locations and repeating the survey, the optimal installation solution can be obtained.

[0030] The MCU module 21 can control the input terminal RECON1 of the first control circuit to a high level, so that the first relay Relay1 is disconnected, and the MCU module 21 controls the input terminal RECON1 of the first control circuit to a low level, so that the first relay Relay1 is closed; the MCU module 21 controls the input terminal RECON2 of the second control circuit to a high level, so that the second relay Relay2 is disconnected, and the MCU module 21 controls the input terminal RECON2 of the second control circuit to a low level, so that the second relay Relay2 is closed; the MCU module 21 controls the input terminal RECON3 of the third control circuit to a high level, so that the third relay Relay3 is disconnected, and the MCU module 21 controls the input terminal RECON3 of the third control circuit to a low level, so that the third relay Relay3 is closed.

[0031] Specifically, in actual survey, the control of the relays of each phase circuit is particularly important. The MCU module 21 controls the high and low levels of RECON1, RECON2, and RECON3 to indirectly control the opening and closing of the first relay Relay1, the second relay Relay2, and the third relay Relay3, thereby realizing the presence or absence of power supply of each phase on the carrier power supply circuit.

[0032] The first relay Relay1 , the second relay Relay2 , and the third relay Relay3 may all be monostable, normally open relays.

[0033] Specifically, the first relay Relay1 controls the A phase power line to be disconnected when it is disconnected, and controls the A phase power line to be closed when it is closed; the first relay Relay1 controls the B phase power line to be disconnected when it is disconnected, and controls the B phase power line to be closed when it is closed; the third relay Relay3 controls the C phase power line to be disconnected when it is disconnected, and controls the C phase power line to be closed when it is closed.

[0034] See also Figure 2 The first control circuit may include a resistor RP1, a resistor RP4, a transistor QP1, a diode DP13, a capacitor CP25, and a first circuit power supply. One end of the resistor RP1 is connected to the input end RECON1, and the other end is connected to the base of the transistor QP1. The emitter of the transistor QP1 is connected to the ground. One end of the resistor RP4 is connected to the base of the transistor QP1, and the other end is connected to the ground. The collector of the transistor QP1 is connected to the anode of the diode DP13. The cathode of the diode DP13 is respectively connected to one end of the capacitor CP25 and the first circuit power supply. The other end of the capacitor CP25 is connected to the ground. One end of the first relay Relay1 is connected to the collector of the transistor QP1, and the other end is connected to the cathode of the diode DP13.

[0035] Specifically, the parameters of resistor RP1 are 2kΩ; 5%; 1 / 16W; 100ppm, that is, the resistance of resistor RP1 is 2kΩ, the accuracy is 5%, the power is 1 / 16W, and the temperature coefficient is 100ppm℃. The parameters of resistor RP4 are 10kΩ; 5%; 1 / 16W; 100ppm, that is, the resistance of resistor RP4 is 10kΩ, the accuracy is 5%, the power is 1 / 16W, and the temperature coefficient is 100ppm℃. The parameters of transistor QP1 are NPN; 0.2A; 40V; 6V; 100~300, that is, transistor QP1 is an NPN transistor, the maximum allowable collector current of transistor QP1 is 0.2A, the voltage applied between collector c and base b to cause reverse breakdown of the transistor is 40V, the voltage applied between collector c and emitter e to cause reverse breakdown of the transistor is 6V, and the amplification factor is 100~300. The diode DP13 is a fast recovery diode, and the parameters of the diode DP13 are 1V; 200mA; 75V; 40ns; 5uA, that is, the rated voltage of the diode DP13 is 1V, the rated current is 200mA, the maximum reverse voltage is 75V, the response time is 40ns, and the reverse leakage current is 5uA. The parameters of the capacitor CP25 are 100nF; 10%; 50V; X7R, that is, the nominal capacity of the capacitor CP25 is 100nF, the capacity accuracy is 10%, the rated working voltage is 50V, and the capacitor CP25 is an X7R capacitor. The parameters of the first relay Relay1 are monostable; normally open; 5A 250VAC / 30VDC; 12VDC. The power supply of the first circuit is VHH_RELAY. Contact No. 3 of the first relay Relay1 is connected to the first wire, and contact No. 4 is connected to the second wire. The first wire transmits the UA signal, and the second wire transmits the UA_PLC signal. An isolator SWP2 is provided between the first wire and the second wire. The parameters of the isolator SWP2 are short-circuit pins; the span is 5mm.

[0036] See also Figure 3 The second control circuit may include a resistor RP5, a resistor RP6, a transistor QP2, a diode DP14, a capacitor CP26, and a second circuit power supply. One end of the resistor RP5 is connected to the input end RECON2, and the other end is connected to the base of the transistor QP2. The emitter of the transistor QP2 is connected to the ground. One end of the resistor RP6 is connected to the base of the transistor QP2, and the other end is connected to the ground. The collector of the transistor QP2 is connected to the anode of the diode DP14. The cathode of the diode DP14 is respectively connected to one end of the capacitor CP26 and the second circuit power supply. The other end of the capacitor CP26 is connected to the ground. One end of the second relay Relay2 is connected to the collector of the transistor QP2, and the other end is connected to the cathode of the diode DP14.

[0037] Specifically, the parameters of resistor RP5 are 2kΩ; 5%; 1 / 16W; 100ppm, that is, the resistance of resistor RP5 is 2kΩ, the accuracy is 5%, the power is 1 / 16W, and the temperature coefficient is 100ppm℃. The parameters of resistor RP6 are 10kΩ; 5%; 1 / 16W; 100ppm, that is, the resistance of resistor RP6 is 10kΩ, the accuracy is 5%, the power is 1 / 16W, and the temperature coefficient is 100ppm℃. The parameters of transistor QP2 are NPN; 0.2A; 40V; 6V; 100~300, that is, transistor QP2 is an NPN transistor, the maximum allowable collector current of transistor QP2 is 0.2A, the voltage applied between collector c and base b to cause reverse breakdown of the transistor is 40V, the voltage applied between collector c and emitter e to cause reverse breakdown of the transistor is 6V, and the amplification factor is 100~300. Diode DP14 is a fast recovery diode, and the parameters of diode DP14 are 1V; 200mA; 75V; 40ns; 5uA, that is, the rated voltage of diode DP14 is 1V, the rated current is 200mA, the maximum reverse voltage is 75V, the response time is 40ns, and the reverse leakage current is 5uA. The parameters of capacitor CP26 are 100nF; 10%; 50V; X7R, that is, the nominal capacity of capacitor CP26 is 100nF, the capacity accuracy is 10%, the rated working voltage is 50V, and capacitor CP26 is an X7R capacitor. The parameters of the second relay Relay2 are monostable; normally open; 5A 250VAC / 30VDC; 12VDC. The power supply of the second circuit is VHH_RELAY. The contact No. 3 of the second relay Relay2 is connected to the third wire, and the contact No. 4 is connected to the fourth wire. The third wire transmits the UB signal, and the fourth wire transmits the UB_PLC signal. An isolator SWP2 is provided between the third wire and the fourth wire. The parameters of the isolator SWP2 are short-circuit pins; the span is 5mm.

[0038] See also Figure 4 The third control circuit may include a resistor RP8, a resistor RP9, a transistor QP3, a diode DP15, a capacitor CP27, and a third circuit power supply. One end of the resistor RP8 is connected to the input end RECON3, and the other end is connected to the base of the transistor QP3. The emitter of the transistor QP3 is connected to the ground. One end of the resistor RP9 is connected to the base of the transistor QP3, and the other end is connected to the ground. The collector of the transistor QP3 is connected to the anode of the diode DP15. The cathode of the diode DP15 is respectively connected to one end of the capacitor CP27 and the third circuit power supply. The other end of the capacitor CP27 is connected to the ground. One end of the third relay Relay3 is connected to the collector of the transistor QP3, and the other end is connected to the cathode of the diode DP15.

[0039] Specifically, the parameters of resistor RP8 are 2kΩ; 5%; 1 / 16W; 100ppm, that is, the resistance of resistor RP8 is 2kΩ, the precision is 5%, the power is 1 / 16W, and the temperature coefficient is 100ppm℃. The parameters of resistor RP9 are 10kΩ; 5%; 1 / 16W; 100ppm, that is, the resistance of resistor RP9 is 10kΩ, the precision is 5%, the power is 1 / 16W, and the temperature coefficient is 100ppm℃. The parameters of transistor QP3 are NPN; 0.2A; 40V; 6V; 100~300, that is, transistor QP3 is an NPN transistor, the maximum allowable collector current of transistor QP3 is 0.2A, the voltage applied between collector c and base b to cause reverse breakdown of the transistor is 40V, the voltage applied between collector c and emitter e to cause reverse breakdown of the transistor is 6V, and the amplification factor is 100~300. The diode DP15 is a fast recovery diode, and the parameters of the diode DP15 are 1V; 200mA; 75V; 40ns; 5uA, that is, the rated voltage of the diode DP15 is 1V, the rated current is 200mA, the maximum reverse voltage is 75V, the response time is 40ns, and the reverse leakage current is 5uA. The parameters of the capacitor CP27 are 100nF; 10%; 50V; X7R, that is, the nominal capacity of the capacitor CP27 is 100nF, the capacity accuracy is 10%, the rated working voltage is 50V, and the capacitor CP27 is an X7R capacitor. The parameters of the first relay Relay1 are monostable; normally open; 5A 250VAC / 30VDC; 12VDC. The power supply of the third circuit is VHH_RELAY. Contact No. 3 of the third relay Relay3 is connected to the fifth wire, and contact No. 4 is connected to the sixth wire. The fifth wire transmits the UC signal, and the sixth wire transmits the UC_PLC signal. An isolator SWP2 is provided between the fifth wire and the sixth wire. The parameters of the isolator SWP2 are short-circuit pins; the span is 5mm.

[0040] The contents described above may be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present invention.

[0041] It should be noted that, in the description of the present application, the terms "upper end", "lower end" and "bottom end" indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A three-phase PLC carrier communication phase control device, characterized in that: The invention comprises a first AC power supply device (1), a first concentrator (4), an A-phase power line, a B-phase power line, a C-phase power line, an N-phase power line, a carrier communication unit (3), and a first controller (2); one end of the A-phase power line, one end of the B-phase power line, one end of the C-phase power line, and one end of the N-phase power line are respectively connected to the first AC power supply device (1); the first concentrator (4) is respectively connected to the A-phase power line, the B-phase power line, the C-phase power line, and the N-phase power line; the first controller (2) is respectively connected to the A-phase power line, the B-phase power line, the C-phase power line, and the N-phase power line; the carrier communication unit (3) comprises a first communication module (31), a second communication module (32 ), a third communication module (33), the first communication module (31) is connected to the A-phase power line, the B-phase power line, the C-phase power line, and the N-phase power line respectively, the second communication module (32) is connected to the A-phase power line and the N-phase power line respectively, the third communication module (33) is connected to the B-phase power line and the N-phase power line respectively, the first concentrator (4) is used to send corresponding communication data to the first communication module (31), the second communication module (32), and the third communication module (33) respectively through the A-phase power line, the B-phase power line, and the C-phase power line; the first controller (2) can control the conduction / disconnection of the A-phase power line, the B-phase power line, and the C-phase power line respectively.

2. A three-phase PLC carrier communication phase control device as claimed in claim 1, characterized in that: It also includes a first relay Relay1, a second relay Relay2, and a third relay Relay3; the first relay Relay1 is used to control the on / off of the A-phase power line; the second relay Relay2 is used to control the on / off of the B-phase power line; the third relay Relay3 is used to control the on / off of the C-phase power line; the first controller (2) can control the on / off of the first relay Relay1, the second relay Relay2, and the third relay Relay3 respectively.

3. A three-phase PLC carrier communication phase control device as claimed in claim 2, characterized in that: The first controller (2) comprises an MCU module (21) and a power module for receiving first electric energy from the first AC power supply device (1) and providing second electric energy to the MCU module (21); the MCU module (21) can respectively control the first relay Relay1, the second relay Relay2, and the third relay Relay3 to be turned on / off.

4. A three-phase PLC carrier communication phase control device as claimed in claim 3, characterized in that: The power module is an ACDC power module (22).

5. A three-phase PLC carrier communication phase-splitting control device as claimed in claim 3 or 4, characterized in that: The device also includes a first control circuit connected to the first relay Relay1, a second control circuit connected to the second relay Relay2, and a third control circuit connected to the third relay Relay3; the MCU module (21) controls the first relay Relay1 to be turned on / off by controlling the level signal at the input end of the first control circuit; the MCU module (21) controls the second relay Relay2 to be turned on / off by controlling the level signal at the input end of the second control circuit; and the MCU module (21) controls the third relay Relay3 to be turned on / off by controlling the level signal at the input end of the third control circuit.

6. A three-phase PLC carrier communication phase control device as claimed in claim 5, characterized in that: The MCU module (21) controls the input terminal RECON1 of the first control circuit to be at a high level, so that the first relay Relay1 is disconnected; the MCU module (21) controls the input terminal RECON1 of the first control circuit to be at a low level, so that the first relay Relay1 is closed; the MCU module (21) controls the input terminal RECON2 of the second control circuit to be at a high level, so that the second relay Relay2 is disconnected; the MCU module (21) controls the input terminal RECON2 of the second control circuit to be at a low level, so that the second relay Relay2 is closed; the MCU module (21) controls the input terminal RECON3 of the third control circuit to be at a high level, so that the third relay Relay3 is disconnected; the MCU module (21) controls the input terminal RECON3 of the third control circuit to be at a low level, so that the third relay Relay3 is closed.

7. A three-phase PLC carrier communication phase control device as claimed in claim 6, characterized in that: The first relay Relay1, the second relay Relay2, and the third relay Relay3 are all monostable, normally open relays.

8. A three-phase PLC carrier communication phase-splitting control device as claimed in claim 6, characterized in that: The first control circuit includes a resistor RP1, a resistor RP4, a transistor QP1, a diode DP13, a capacitor CP25, and a first circuit power supply. One end of the resistor RP1 is connected to the input end RECON1, and the other end is connected to the base of the transistor QP1. The emitter of the transistor QP1 is connected to the ground. One end of the resistor RP4 is connected to the base of the transistor QP1, and the other end is connected to the ground. The collector of the transistor QP1 is connected to the positive electrode of the diode DP13, and the negative electrode of the diode DP13 is respectively connected to one end of the capacitor CP25 and the first circuit power supply. The other end of the capacitor CP25 is connected to the ground. One end of the first relay Relay1 is connected to the collector of the transistor QP1, and the other end is connected to the negative electrode of the diode DP13.

9. A three-phase PLC carrier communication phase-splitting control device as claimed in claim 6, characterized in that: The second control circuit includes a resistor RP5, a resistor RP6, a transistor QP2, a diode DP14, a capacitor CP26, and a second circuit power supply. One end of the resistor RP5 is connected to the input end RECON2, and the other end is connected to the base of the transistor QP2. The emitter of the transistor QP2 is connected to the ground. One end of the resistor RP6 is connected to the base of the transistor QP2, and the other end is connected to the ground. The collector of the transistor QP2 is connected to the positive electrode of the diode DP14, and the negative electrode of the diode DP14 is respectively connected to one end of the capacitor CP26 and the second circuit power supply. The other end of the capacitor CP26 is connected to the ground. One end of the second relay Relay2 is connected to the collector of the transistor QP2, and the other end is connected to the negative electrode of the diode DP14.

10. A three-phase PLC carrier communication phase control device as claimed in claim 6, characterized in that: The third control circuit includes a resistor RP8, a resistor RP9, a transistor QP3, a diode DP15, a capacitor CP27, and a third circuit power supply. One end of the resistor RP8 is connected to the input end RECON3, and the other end is connected to the base of the transistor QP3. The emitter of the transistor QP3 is connected to the ground. One end of the resistor RP9 is connected to the base of the transistor QP3, and the other end is connected to the ground. The collector of the transistor QP3 is connected to the positive electrode of the diode DP15. The negative electrode of the diode DP15 is respectively connected to one end of the capacitor CP27 and the third circuit power supply. The other end of the capacitor CP27 is connected to the ground. One end of the third relay Relay3 is connected to the collector of the transistor QP3, and the other end is connected to the negative electrode of the diode DP15.

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