Plc module and debugging method of the same

Abstract

The application provides a PLC module and a debugging method of the PLC module; wherein the PLC module comprises a PLC control device, a first driving circuit and a second driving circuit; the first driving circuit is connected with a first pin of the PLC control device, the PLC control device outputs a first polarity signal to the first driving circuit through the first pin, the first driving circuit is used for amplifying the first polarity signal, and the amplified first polarity signal is transmitted to a power line; the second driving circuit is connected with a second pin of the PLC control device, the PLC control device outputs a second polarity signal to the second driving circuit through the second pin, and the second driving circuit is used for amplifying the second polarity signal, and the amplified second polarity signal is transmitted to the power line. The PLC module can increase signal strength, guarantee that the PLC communication distance and communication quality meet the requirements even when the signal attenuation is serious, and realize stable communication.

Description

Technical Field

[0001] This application relates to the field of power technology, and in particular to a PLC module and a method for debugging the PLC module. Background Technology

[0002] A PLC (Power Line Communication) module includes a PLC control chip and a single-chip line driver chip. The PLC control chip outputs communication signals, and the line driver chip amplifies the communication signals before transmitting them to the power line. The power equipment connected to the power line has capacitive loads. When the capacitive load is large, the communication signal attenuates severely, reducing the PLC communication distance and communication quality. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a PLC module and a PLC module debugging method to increase signal strength, so as to ensure that the PLC communication distance and communication quality meet the requirements even when the signal attenuation is severe, and to achieve stable communication.

[0004] In a first aspect, embodiments of this application provide a PLC module, which includes: a PLC controller, a first drive circuit, and a second drive circuit; the first drive circuit is connected to a first pin of the PLC controller, and the PLC controller outputs a first polarity signal to the first drive circuit through the first pin, the first drive circuit amplifies the first polarity signal, and transmits the amplified first polarity signal to the power line; the second drive circuit is connected to a second pin of the PLC controller, and the PLC controller outputs a second polarity signal to the second drive circuit through the second pin, the second drive circuit amplifies the second polarity signal, and transmits the amplified second polarity signal to the power line; wherein the polarities of the second polarity signal and the first polarity signal are different.

[0005] The first and second drive circuits are also connected to the enable pin of the PLC controller; the PLC controller controls the first drive circuit to start or stop through the enable pin, and the PLC controller controls the second drive circuit to start or stop through the enable pin.

[0006] The aforementioned PLC module includes a communication transformer; a first drive circuit and a second drive circuit are respectively connected to the primary winding of the communication transformer; and a power line is connected to the secondary winding of the communication transformer.

[0007] A protection circuit is provided between the aforementioned communication transformer and the first drive circuit, and / or between the communication transformer and the second drive circuit; the protection circuit includes: a current-limiting resistor and a DC blocking capacitor.

[0008] The protection circuit described above includes multiple protection branches connected in parallel, each protection branch including a current-limiting resistor and a DC blocking capacitor connected in series; or, the protection circuit includes multiple current-limiting resistors connected in parallel, and the multiple current-limiting resistors connected in parallel are connected in series with the DC blocking capacitor.

[0009] The aforementioned PLC module includes a filter circuit; the filter circuit is connected to both the PLC controller and the primary winding of the communication transformer.

[0010] An on / off control device is provided between the aforementioned filter circuit and the primary winding of the communication transformer.

[0011] The secondary winding of the aforementioned communication transformer is connected to the power line via a carrier terminal.

[0012] An isolation capacitor is provided between the secondary winding of the aforementioned communication transformer and the carrier terminal.

[0013] The primary winding of the aforementioned communication transformer includes: a first winding and a second winding arranged in parallel; a first driving circuit and a second driving circuit respectively connected to the first winding; and a filter circuit connected to the second winding.

[0014] The number of turns in the first winding is less than the number of turns in the secondary winding of the communication transformer.

[0015] The aforementioned communication transformer includes a first communication transformer and a second communication transformer; a first drive circuit is connected to the primary winding of the first communication transformer; a second drive circuit is connected to the primary winding of the second communication transformer; the primary windings of the first and second communication transformers are connected in parallel; and the secondary windings of the first and second communication transformers are connected in parallel.

[0016] The primary winding of the first or second communication transformer is connected to a filter circuit.

[0017] The primary winding of the first communication transformer includes a third winding and a fourth winding arranged in parallel; a first drive circuit is connected to the third winding. The primary winding of the second communication transformer includes a fifth winding and a sixth winding arranged in parallel; a second drive circuit is connected to the fifth winding.

[0018] The aforementioned fourth or sixth winding is connected to a filter circuit.

[0019] The aforementioned first driving circuit includes multiple components, and the first communication transformer includes multiple components. Each first driving circuit is connected to the primary winding of the corresponding first communication transformer. The second driving circuit includes multiple components, and the second communication transformer includes multiple components. Each second driving circuit is connected to the primary winding of the corresponding second communication transformer.

[0020] Each of the first communication transformers mentioned above includes multiple primary windings arranged in parallel, and the first drive circuit is connected to one of the primary windings of the corresponding first communication transformer; each of the second communication transformers includes multiple primary windings arranged in parallel, and the second drive circuit is connected to one of the primary windings of the corresponding second communication transformer.

[0021] The secondary windings of the aforementioned multiple first communication transformers are connected in parallel, and the secondary windings of the multiple second communication transformers are connected in parallel.

[0022] The first driving circuit and the second driving circuit mentioned above have the same number of circuits.

[0023] Secondly, embodiments of this application provide a debugging method for a PLC module, the method being applied to the PLC controller of the PLC module; the method includes: determining a target drive circuit; wherein the target drive circuit includes: at least one first drive circuit and at least one second drive circuit; sending a debugging signal to the target drive circuit, amplifying the debugging signal through the target drive circuit, and then transmitting it to a power line; wherein the power line is connected to a power device; receiving communication quality parameters returned by the power device, and based on the communication quality parameters, determining the number of first drive circuits and the number of second drive circuits that need to be started in the PLC module.

[0024] Before the step of sending the debugging signal to the target drive circuit, the method further includes: controlling the filter circuit in the PLC module to disconnect; the step of receiving the communication quality parameters returned by the power equipment includes: controlling the filter circuit in the PLC module to turn on, receiving the communication quality parameters returned by the power equipment through the filter circuit, filtering the communication quality parameters, and sending the filtered communication quality parameters to the PLC controller.

[0025] Before the step of sending the debug signal to the target drive circuit, the method further includes: adjusting the signal strength of the debug signal.

[0026] The aforementioned power line connects the inverter and the combiner box; the communication quality parameters include at least one of the following: the noise parameters at the signal coupling point between the inverter and the combiner box, the noise parameters at the receiver end of the combiner box, and the noise parameters of the inverter.

[0027] The aforementioned power line connects the power transformer and the inverter; the communication quality parameters include at least one of the following: noise parameters at the signal coupling point between the power transformer and the inverter, noise parameters at the inverter receiver, and noise parameters of the power transformer.

[0028] The aforementioned PLC module and its debugging method include a PLC controller, a first drive circuit, and a second drive circuit. The first drive circuit is connected to a first pin of the PLC controller, and the PLC controller outputs a first polarity signal to the first drive circuit through the first pin. The first drive circuit amplifies the first polarity signal and transmits the amplified first polarity signal to the power line. The second drive circuit is connected to a second pin of the PLC controller, and the PLC controller outputs a second polarity signal to the second drive circuit through the second pin. The second drive circuit amplifies the second polarity signal and transmits the amplified second polarity signal to the power line. The second polarity signal and the first polarity signal have different polarities.

[0029] In the PLC module described above, signals of different polarities are amplified through different drive circuits, which can increase signal strength. Even when the signal attenuation is severe, the PLC communication distance and communication quality can be guaranteed to meet the requirements, thus achieving stable communication.

[0030] Furthermore, compared to the prior art, where the first polarity signal and the second polarity signal are input as a signal pair to the same driving circuit for amplification, the wiring becomes complex when there are many driving circuits, and the structure and model of multiple driving circuits need to be consistent; in this application, signals of different polarities are amplified through different driving circuits, and each driving circuit only needs to input one polarity signal, which simplifies the wiring, and the structure and model of the driving circuits do not need to be consistent, thus improving the flexibility of circuit selection.

[0031] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0032] To more clearly illustrate the specific embodiments of this application or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 A schematic diagram of a PLC module provided in an embodiment of this application;

[0034] Figure 2 A circuit topology diagram including a PLC module is provided for an embodiment of this application;

[0035] Figure 3 A schematic diagram of another circuit topology including a PLC module provided for an embodiment of this application;

[0036] Figure 4 A schematic diagram of another circuit topology including a PLC module provided for an embodiment of this application;

[0037] Figure 5 A schematic diagram of another circuit topology including a PLC module provided for an embodiment of this application;

[0038] Figure 6 A schematic diagram of another circuit topology including a PLC module provided for an embodiment of this application;

[0039] Figure 7 A schematic diagram of another PLC module provided in an embodiment of this application;

[0040] Figure 8 A schematic diagram of another circuit topology including a PLC module provided for an embodiment of this application;

[0041] Figure 9 A schematic diagram of another circuit topology including a PLC module provided for an embodiment of this application;

[0042] Figure 10 A schematic diagram illustrating the application of the PLC module provided in this application embodiment in a DC PLC communication system;

[0043] Figure 11 A schematic diagram illustrating the application of the PLC module provided in this application embodiment in an AC PLC communication system;

[0044] Figure 12 A flowchart illustrating a debugging method for a PLC module provided in an embodiment of this application. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] In related technologies, the AC or DC PLC modules used in power systems are composed of PLC control chips and single-chip line drive chips. Among them, AC PLC modules are used in string inverter systems, which have the problem of large capacitive load on the transformer side; DC PLC modules are used in centralized inverter systems, which have the problem of large capacitive load on the bus capacitor.

[0047] Because the driving capability of the single-chip drive in a PLC module is limited, the signal power output by the PLC module will be severely attenuated when the capacitive load in the system is large, affecting the communication distance and communication quality. Therefore, this application provides a PLC module and a PLC module debugging method, which can be applied to PLC communication in power systems.

[0048] To facilitate understanding of this embodiment, a PLC module disclosed in this application embodiment will first be described in detail, such as... Figure 1 As shown, the PLC module includes: a PLC controller 10, a first drive circuit 11, and a second drive circuit 12;

[0049] The first drive circuit is connected to the first pin of the PLC controller. The PLC controller outputs a first polarity signal to the first drive circuit through the first pin. The first drive circuit is used to amplify the first polarity signal and transmit the amplified first polarity signal to the power line.

[0050] The second drive circuit is connected to the second pin of the PLC controller. The PLC controller outputs a second polarity signal to the second drive circuit through the second pin. The second drive circuit is used to amplify the second polarity signal and transmit the amplified second polarity signal to the power line. The polarity of the second polarity signal is different from that of the first polarity signal.

[0051] The first polarity signal and the second polarity signal can have the same communication content and the same signal strength, but the polarities of the first polarity signal and the second polarity signal are different. For example, the first polarity signal is positive and the second polarity signal is negative; or, the first polarity signal is negative and the second polarity signal is positive.

[0052] The PLC controller can simultaneously emit a first polarity signal through the first pin and a second polarity signal through the second pin, so that the timing of the first polarity signal and the second polarity signal are the same.

[0053] In one example, the PLC controller can specifically be a PLC chip, with the first pin being the TX+ pin and the second pin being the TX- pin. The aforementioned first and second drive circuits can be implemented using a driver chip. Specifically, the first and second drive circuits can be line drive circuits, and their circuit structures and parameters can be the same or different.

[0054] Both the first polarity signal and the second polarity signal are transmitted on the power line and can be sent to the power equipment connected to the power line, such as inverters, box-type transformers, combiner boxes, and other equipment.

[0055] The aforementioned PLC module includes a PLC controller, a first drive circuit, and a second drive circuit. The first drive circuit is connected to a first pin of the PLC controller, and the PLC controller outputs a first polarity signal to the first drive circuit through the first pin. The first drive circuit amplifies the first polarity signal and transmits the amplified first polarity signal to the power line. The second drive circuit is connected to a second pin of the PLC controller, and the PLC controller outputs a second polarity signal to the second drive circuit through the second pin. The second drive circuit amplifies the second polarity signal and transmits the amplified second polarity signal to the power line. The second polarity signal and the first polarity signal have different polarities.

[0056] In the PLC module described above, signals of different polarities are amplified through different drive circuits, which can increase signal strength. Even when the signal attenuation is severe, the PLC communication distance and communication quality can be guaranteed to meet the requirements, thus achieving stable communication.

[0057] Furthermore, compared to the prior art, where the first polarity signal and the second polarity signal are input as a signal pair to the same driving circuit for amplification, the wiring becomes complex when there are many driving circuits, and the structure and model of multiple driving circuits need to be consistent; in this application, signals of different polarities are amplified through different driving circuits, and each driving circuit only needs to input one polarity signal, which simplifies the wiring, and the structure and model of the driving circuits do not need to be consistent, thus improving the flexibility of circuit selection.

[0058] In one specific implementation, see [link to implementation details]. Figure 2 The circuit topology diagram shown includes a PLC module; the first drive circuit and the second drive circuit are also connected to the enable pin of the PLC controller; the PLC controller controls the first drive circuit to start or stop through the enable pin, and the PLC controller controls the second drive circuit to start or stop through the enable pin.

[0059] The first and second drive circuits can be connected to the same enable pin of the PLC controller. In this case, the PLC controller can control the first and second drive circuits to start or stop simultaneously through this enable pin. Figure 2 In the first drive circuit and the second drive circuit, both are connected to the enable pin EN1.

[0060] The first drive circuit and the second drive circuit can be connected to different enable pins of the PLC controller. In this case, the PLC controller can control the start or stop of the first drive circuit and the second drive circuit respectively through the corresponding enable pins.

[0061] The aforementioned PLC module includes a communication transformer; a first drive circuit and a second drive circuit are respectively connected to the primary winding of the communication transformer; and a power line is connected to the secondary winding of the communication transformer. This communication transformer can adjust the signal voltage of the signals output by the first and second drive circuits, amplify the signal voltage, and also provide electrical isolation.

[0062] A protection circuit is provided between the aforementioned communication transformer and the first drive circuit, and / or between the communication transformer and the second drive circuit; the protection circuit includes: a current-limiting resistor and a DC blocking capacitor.

[0063] exist Figure 2 In the example, protection circuits are respectively provided between the communication transformer and the first drive circuit, and between the communication transformer and the second drive circuit; in the protection circuit, the current-limiting resistor is used to limit the current, and the DC blocking capacitor is used to isolate the DC signal.

[0064] The purpose of this protection circuit is to prevent the output signal of one drive circuit from flowing back into the other drive circuit when there is a timing difference between the output signals of the first drive circuit and the second drive circuit. When the output signal strength is large, it will damage the drive circuit that is flowing back in.

[0065] For example, when the first driving circuit outputs signal 1, the second driving circuit does not output a signal. At this time, the second driving circuit may receive output signal 1. The protection circuit connected to the second driving circuit limits the current and blocks DC of output signal 1, so that the second driving circuit receives a weaker output signal 1, or does not receive output signal 1 at all.

[0066] In the above protection circuit, the current-limiting resistor and the DC-blocking capacitor are connected in series; when there is only one current-limiting resistor and one DC-blocking capacitor in the protection circuit, the current-limiting resistor and the DC-blocking capacitor are connected in series. In another embodiment, the protection circuit includes multiple current-limiting resistors connected in parallel, and these parallel current-limiting resistors are then connected in series with the DC-blocking capacitor. Figure 2 In the example, the protection circuit corresponding to each driving circuit takes two current-limiting resistors as an example. The protection circuit connected to the first driving circuit includes current-limiting resistors R1 and R2, and the protection circuit connected to the second driving circuit includes current-limiting resistors R3 and R4.

[0067] The protection circuit connected to the first drive circuit includes a DC blocking capacitor C1, and current-limiting resistors R1 and R2 connected in parallel and then in series with the DC blocking capacitor C1. The protection circuit connected to the second drive circuit includes a DC blocking capacitor C2, and current-limiting resistors R3 and R4 connected in parallel and then in series with the DC blocking capacitor C2. Multiple current-limiting resistors connected in parallel share a single DC blocking capacitor, which reduces circuit cost.

[0068] There is another way, such as Figure 3 In the middle, the protection circuit includes multiple protection branches connected in parallel, and each protection branch includes a current-limiting resistor and a DC blocking capacitor connected in series; Figure 3 Taking two protection branches as an example, in the protection circuit connected to the first driving circuit, the first protection branch includes a current-limiting resistor R1 and a DC blocking capacitor C1 connected in series, and the second protection branch includes a current-limiting resistor R2 and a DC blocking capacitor C3 connected in series.

[0069] In the protection circuit connected to the second drive circuit, the first protection branch includes a series current-limiting resistor R3 and a DC blocking capacitor C2, and the second protection branch includes a series current-limiting resistor R4 and a DC blocking capacitor C4.

[0070] Furthermore, such as Figure 2 and Figure 3 The aforementioned PLC module includes a filtering circuit; this filtering circuit is connected to both the PLC controller and the primary winding of the communication transformer. This filtering circuit is used to filter signals received from the power line, for example, to filter out noise and out-of-band signals; and then sends the filtered signal to the PLC controller.

[0071] An on / off control device is provided between the aforementioned filter circuit and the primary winding of the communication transformer. This on / off control device can be a switching device or other devices with on / off control functions. Figure 2 and Figure 3 In this context, the on / off control device is represented as K1.

[0072] If the signal strength of the signals emitted by the first driving circuit and the second driving circuit is high, the signal may damage the filter circuit. Therefore, when the first driving circuit and the second driving circuit emit signals, the on / off control device is disconnected, which can ensure that the signals emitted by the first driving circuit and the second driving circuit cannot be transmitted to the filter circuit, thus protecting the filter circuit from damage.

[0073] After the first and second drive circuits finish sending signals, the on / off control device closes, allowing the filter circuit to receive the signal transmitted from the power line.

[0074] Furthermore, the secondary winding of the aforementioned communication transformer is connected to the power line via a carrier terminal, and the signal is transmitted to the power line through the carrier terminal. An isolation capacitor is provided between the secondary winding of the communication transformer and the carrier terminal, which serves to isolate high voltage.

[0075] In one specific implementation, the primary winding of the aforementioned communication transformer includes: a first winding and a second winding arranged in parallel; a first driving circuit and a second driving circuit respectively connected to the first winding; and a filter circuit connected to the second winding.

[0076] exist Figure 4 In the example, the first winding is represented as winding 1, the second winding as winding 2, and the secondary winding as winding 3. Both the first and second drive circuits are connected to winding 1. The filter circuit is connected to winding 2. This method isolates the winding connected to the drive circuit from the winding connected to the filter circuit, and the number of turns of the first and second windings can be adjusted separately.

[0077] Specifically, the number of turns in the first winding is less than the number of turns in the secondary winding of the communication transformer. That is, the number of turns in the secondary winding is greater than the number of turns in the first winding, thus amplifying the signal voltage and further increasing the signal transmission power.

[0078] In one example, Figure 4 The ratio of the number of turns of the windings 1, 2 and 3 is 1:2:2; that is, the number of turns of the secondary winding is twice the number of turns of the first winding, and the number of turns of the second winding is the same as the number of turns of the secondary winding.

[0079] In another implementation, the aforementioned communication transformer includes a first communication transformer and a second communication transformer; a first drive circuit is connected to the primary winding of the first communication transformer; a second drive circuit is connected to the primary winding of the second communication transformer; the primary windings of the first and second communication transformers are connected in parallel; and the secondary windings of the first and second communication transformers are connected in parallel.

[0080] exist Figure 5 In the example, each drive circuit is equipped with a communication transformer; the primary and secondary sides of the communication transformer are each equipped with a set of windings.

[0081] The primary winding of either the first or second communication transformer is connected to a filter circuit. That is, the filter circuit can be connected to any communication transformer to receive signals transmitted from the power line. Figure 5 In the example, the filter circuit is connected to the second communication transformer.

[0082] Another way to implement it is, such as Figure 6 The primary winding of the first communication transformer includes a third winding and a fourth winding arranged in parallel; a first drive circuit is connected to the third winding. The primary winding of the second communication transformer includes a fifth winding and a sixth winding arranged in parallel; a second drive circuit is connected to the fifth winding.

[0083] The fourth or sixth winding is connected to the filter circuit. Figure 6 In this configuration, the filter circuit is connected to the sixth winding, while the fourth winding remains idle; alternatively, the filter circuit can be connected to the fourth winding, while the sixth winding remains idle.

[0084] In this method, each drive circuit corresponds to a communication transformer, and the winding connected to the drive circuit and the winding connected to the filter circuit in the primary winding of the communication transformer are isolated. At the same time, the number of turns of the two sets of windings in the primary winding can be adjusted separately.

[0085] Specifically, the number of turns in the third winding is less than the number of turns in the secondary winding of the first communication transformer. The number of turns in the fifth winding is less than the number of turns in the secondary winding of the second communication transformer. That is, the number of turns in the secondary winding is greater than the number of turns in the winding connected to the drive circuit in the primary winding, thus amplifying the signal voltage and further improving the signal transmission power.

[0086] In one example, Figure 6 In the first communication transformer, the ratio of the number of turns in the third winding, the fourth winding, and the secondary winding is 1:2:2; that is, the number of turns in the secondary winding is twice the number of turns in the third winding, and the number of turns in the fourth winding is the same as the number of turns in the secondary winding.

[0087] The turns ratio of the fifth, sixth, and secondary windings of the second communication transformer is 1:2:2; that is, the number of turns in the secondary winding is twice the number of turns in the fifth winding, and the number of turns in the sixth winding is the same as the number of turns in the secondary winding.

[0088] Another way to implement it is, such as Figure 7 In the first driving circuit, there are multiple first driving circuits, each connected to a first pin, and the multiple first driving circuits amplify the first polarity signal output from the first pin; the second driving circuit also includes multiple second driving circuits, each connected to a second pin, and the multiple second driving circuits amplify the second polarity signal output from the second pin.

[0089] The more first driving circuits there are, the greater the amplification capability of the first polarity signal. Similarly, the more second driving circuits there are, the greater the amplification capability of the second polarity signal, thereby further improving the communication distance and communication quality of the communication signal.

[0090] Furthermore, the aforementioned first driving circuit includes multiple components, the first communication transformer includes multiple components, and each first driving circuit is connected to the primary winding of the corresponding first communication transformer; the second driving circuit includes multiple components, the second communication transformer includes multiple components, and each second driving circuit is connected to the primary winding of the corresponding second communication transformer.

[0091] In this configuration, each first drive circuit is equipped with a first communication transformer, and each second drive circuit is equipped with a second communication transformer. The filter circuit can be connected to the primary winding of any first communication transformer or to the primary winding of any second communication transformer.

[0092] like Figure 8 In this example, taking two first driving circuits and two second driving circuits as an example, two first communication transformers and two second communication transformers are set up simultaneously; wherein, the first driving circuit 1 is connected to the primary winding 1 of one of the first communication transformers, and the first driving circuit 2 is connected to the primary winding 3 of the other first communication transformer; the second driving circuit 1 is connected to the primary winding 5 of one of the second communication transformers, and the second driving circuit 2 is connected to the primary winding 7 of the other second communication transformer.

[0093] Primary winding 1, primary winding 3, primary winding 5 and primary winding 7 are connected in parallel, and the filter circuit is connected in parallel with primary winding 1, primary winding 3, primary winding 5 and primary winding 7.

[0094] The secondary windings of the two first communication transformers and the two second communication transformers are secondary winding 1, secondary winding 2, secondary winding 3 and secondary winding 4, respectively, and these four secondary windings are connected in parallel.

[0095] In another implementation, each first communication transformer includes multiple primary windings connected in parallel, and a first drive circuit is connected to one of the primary windings of the corresponding first communication transformer; each second communication transformer includes multiple primary windings connected in parallel, and a second drive circuit is connected to one of the primary windings of the corresponding second communication transformer.

[0096] Each first communication transformer includes two or more primary windings connected in parallel. The first drive circuit is connected to one of the primary windings of the corresponding first communication transformer, and the other primary windings can be left idle or connected to the filter circuit.

[0097] Similarly, each second communication transformer includes two or more primary windings connected in parallel. The second drive circuit is connected to one of the primary windings of the corresponding second communication transformer, while the other primary windings can be left idle or connected to the filter circuit.

[0098] like Figure 9 In this example, each first communication transformer includes two primary windings arranged in parallel, and each second communication transformer includes two primary windings arranged in parallel.

[0099] In this method, each drive circuit corresponds to a communication transformer, and the windings connected to the drive circuit and the windings connected to the filter circuit in the primary winding of the communication transformer are isolated. At the same time, the number of turns of the two sets of primary windings in the communication transformer can be adjusted separately.

[0100] Specifically, the number of turns in the primary winding is less than the number of turns in the secondary winding of the communication transformer, which can amplify the signal voltage and further improve the signal transmission power.

[0101] For example, Figure 9 In the communication transformer connected to the first drive circuit 1, the turns ratio of the primary winding 1, primary winding 2, and secondary winding 1 is 1:2:2; that is, the number of turns in the secondary winding is twice the number of turns in the primary winding 1, and the number of turns in the primary winding 2 is the same as the number of turns in the secondary winding. The number of turns in the windings of other transformers can be referenced to the communication transformer connected to the first drive circuit 1.

[0102] Figure 9 In this circuit, primary windings 2, 4, and 6 are left unused, and the filter circuit is connected to primary winding 8. Of course, the filter circuit can also be connected to primary windings 2, 4, or 6.

[0103] Figure 9 The system includes two first drive circuits and two second drive circuits, and also includes two first communication transformers and two second communication transformers. The first drive circuit 1 is connected to the primary winding 1 of one of the first communication transformers, and the first drive circuit 2 is connected to the primary winding 3 of the other first communication transformer. The second drive circuit 1 is connected to the primary winding 5 of one of the second communication transformers, and the second drive circuit 2 is connected to the primary winding 7 of the other second communication transformer.

[0104] The secondary windings of the two first communication transformers and the two second communication transformers are secondary winding 1, secondary winding 2, secondary winding 3 and secondary winding 4, respectively, and these four secondary windings are connected in parallel.

[0105] For the secondary windings of communication transformers, the secondary windings of multiple first communication transformers are connected in parallel, and the secondary windings of multiple second communication transformers are connected in parallel. (Reference) Figure 8 or Figure 9 In this diagram, secondary winding 1 and secondary winding 2 are the secondary windings of the first communication transformer, and secondary winding 1 and secondary winding 2 are connected in parallel; secondary winding 3 and secondary winding 4 are the secondary windings of the second communication transformer, and secondary winding 3 and secondary winding 4 are connected in parallel; it can also be described as secondary winding 1, secondary winding 2, secondary winding 3 and secondary winding 4 connected in parallel.

[0106] Specifically, the first driving circuit and the second driving circuit have the same number of circuits. Typically, the signal strengths of the first polarity signal and the second polarity signal need to be kept the same; therefore, the first driving circuit and the second driving circuit have the same number of circuits.

[0107] Figure 10The diagram illustrates the application of a PLC module in a DC PLC communication system. The PLC controller is connected to the core control unit, which sends communication commands to the PLC controller. Power lines connect to a centralized inverter, which contains a PLC signal coupling point. Multiple power lines branch off from this PLC signal coupling point and connect to their respective combiner boxes.

[0108] Figure 11 The diagram shows a PLC module applied in an AC PLC communication system. The PLC controller is connected to a data acquisition unit, which sends communication commands to the PLC controller. Power lines connect to a box-type transformer, which contains a PLC signal coupling point. Multiple power lines branch off from this PLC signal coupling point and connect to corresponding inverters.

[0109] For an embodiment corresponding to the above PLC module, see [link to embodiment]. Figure 12 The diagram illustrates a debugging method for a PLC module. This method is applied to the PLC controller of the PLC module. The PLC controller can execute this method upon receiving instructions from the core control unit or data acquisition unit, or it can execute the method proactively. The method includes:

[0110] Step S122: Determine the target driving circuit; wherein the target driving circuit includes: at least one first driving circuit and at least one second driving circuit;

[0111] Step S124: The debugging signal is sent to the target drive circuit, which amplifies the debugging signal and then transmits it to the power line; wherein the power line is connected to the power equipment.

[0112] Step S126: Receive communication quality parameters returned by the power equipment, and based on the communication quality parameters, determine the number of first drive circuits and the number of second drive circuits that need to be started in the PLC module.

[0113] To determine the number of first drive circuits and the number of second drive circuits, the above steps S102 and S104 may need to be executed at least once to obtain the communication quality parameters returned by the power equipment after each execution. The number of first drive circuits and the number of second drive circuits in the target drive circuits that meet the communication quality parameters are determined as the number of first drive circuits and the number of second drive circuits that need to be started in the PLC module.

[0114] For example, during the first execution of steps S122 and S124, the target drive circuit includes a first drive circuit and a second drive circuit, and the communication quality parameters corresponding to the first drive circuit and the second drive circuit are obtained. If the communication quality parameters meet the requirements, it can be determined that a first drive circuit and a second drive circuit need to be started in the PLC module.

[0115] If the communication quality parameters do not meet the requirements, steps S122 and S124 are executed again. The target driving circuit includes two first driving circuits and two second driving circuits to obtain the communication quality parameters corresponding to the two first driving circuits and the two second driving circuits. This process is repeated until the communication quality parameters that meet the requirements are obtained.

[0116] The above-described debugging method for a PLC module is applied to the PLC controller of the PLC module. The method involves: determining the target drive circuit; wherein the target drive circuit includes at least one first drive circuit and at least one second drive circuit; sending a debugging signal to the target drive circuit, amplifying the debugging signal, and then transmitting it to a power line; wherein the power line is connected to a power device; receiving communication quality parameters returned by the power device, and based on the communication quality parameters, determining the number of first drive circuits and the number of second drive circuits that need to be activated in the PLC module. In this method, the PLC module can automatically debug to obtain the number of first drive circuits and the number of second drive circuits that meet the communication requirements. The debugging method is fast and efficient, and it ensures the PLC communication distance and communication quality, achieving stable communication.

[0117] It should be noted that when there are a large number of first and second drive circuits in the PLC module, the appropriate number of first and second drive circuits can be determined based on the communication quality parameters returned by the power equipment. This number can meet the communication requirements without consuming too much power and reducing the heat generation of the PLC module.

[0118] Furthermore, during the above debugging process, the number of the first drive circuit and the number of the second drive circuit can be adjusted, and the signal strength of the debugging signal sent by the PLC control chip can also be adjusted, thus making the adjustment method more flexible.

[0119] In contrast to related technologies, where operators can only manually adjust the transmission power of the PLC chip with limited adjustment range and complex operation, this application uses the above-mentioned debugging method to automatically adjust the number of drive circuits and the signal strength of PLC controllers. The adjustment method is flexible, convenient to operate, and has a large power adjustment range, meeting the communication needs of various circuit communication environments.

[0120] In actual implementation, you can refer to Figure 10 or Figure 11 For example, before the debugging signal is sent to the target drive circuit, the filter circuit in the control PLC module is disconnected; that is, the on / off control device K1 is disconnected. When the first drive circuit and the second drive circuit send signals, the signal is prevented from being input to the filter circuit and causing damage to the filter circuit. Disconnecting the filter circuit can protect the filter circuit.

[0121] After the first and second drive circuits finish sending signals, the filter circuit in the control PLC module is turned on. The filter circuit receives the communication quality parameters returned by the power equipment, filters the communication quality parameters, and sends the filtered communication quality parameters to the PLC controller.

[0122] Furthermore, when the aforementioned power line connects the inverter and the combiner box, the communication quality parameters include at least one of the following: noise parameters at the signal coupling point between the inverter and the combiner box, noise parameters at the receiver end of the combiner box, and noise parameters of the inverter. When the power line connects the power transformer and the inverter, the communication quality parameters include at least one of the following: noise parameters at the signal coupling point between the power transformer and the inverter, noise parameters at the receiver end of the inverter, and noise parameters of the power transformer.

[0123] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the system and apparatus described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0124] Furthermore, in the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0125] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0126] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0127] Finally, it should be noted that the above embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A PLC module, characterized in that, The PLC module includes: a PLC controller, a first drive circuit, and a second drive circuit; The first drive circuit is connected to the first pin of the PLC controller. The PLC controller outputs a first polarity signal to the first drive circuit through the first pin. The first drive circuit is used to amplify the first polarity signal and transmit the amplified first polarity signal to the power line. The second drive circuit is connected to the second pin of the PLC controller. The PLC controller outputs a second polarity signal to the second drive circuit through the second pin. The second drive circuit amplifies the second polarity signal and transmits the amplified second polarity signal to the power line. The polarity of the second polarity signal is different from that of the first polarity signal.

2. The PLC module according to claim 1, characterized in that, The first drive circuit and the second drive circuit are also connected to the enable pin of the PLC controller. The PLC controller controls the first drive circuit to start or stop via the enable pin, and the PLC controller controls the second drive circuit to start or stop via the enable pin.

3. The PLC module according to claim 1, characterized in that, The PLC module includes a communication transformer; The first driving circuit and the second driving circuit are respectively connected to the primary winding of the communication transformer; the power line is connected to the secondary winding of the communication transformer.

4. The PLC module according to claim 3, characterized in that, A protection circuit is provided between the communication transformer and the first driving circuit, and / or between the communication transformer and the second driving circuit; The protection circuit includes a current-limiting resistor and a DC-blocking capacitor.

5. The PLC module according to claim 4, characterized in that, The protection circuit includes multiple protection branches connected in parallel, and each protection branch includes a current-limiting resistor and a DC blocking capacitor connected in series. Alternatively, the protection circuit includes multiple current-limiting resistors connected in parallel, and the parallel current-limiting resistors are connected in series with the DC blocking capacitor.

6. The PLC module according to claim 3, characterized in that, The PLC module includes a filter circuit; the filter circuit is connected to the PLC controller and the primary winding of the communication transformer, respectively.

7. The PLC module according to claim 6, characterized in that, An on / off control device is provided between the filter circuit and the primary winding of the communication transformer.

8. The PLC module according to claim 3, characterized in that, The secondary winding of the communication transformer is connected to the power line via a carrier terminal.

9. The PLC module according to claim 8, characterized in that, An isolation capacitor is provided between the secondary winding of the communication transformer and the carrier terminal.

10. The PLC module according to claim 6, characterized in that, The primary winding of the communication transformer includes: a first winding and a second winding arranged in parallel; The first driving circuit and the second driving circuit are respectively connected to the first winding; The filter circuit is connected to the second winding.

11. The PLC module according to claim 10, characterized in that, The number of turns in the first winding is less than the number of turns in the secondary winding of the communication transformer.

12. The PLC module according to claim 3, characterized in that, The communication transformer includes a first communication transformer and a second communication transformer; The first drive circuit is connected to the primary winding of the first communication transformer; the second drive circuit is connected to the primary winding of the second communication transformer. The primary winding of the first communication transformer and the primary winding of the second communication transformer are connected in parallel; the secondary winding of the first communication transformer and the secondary winding of the second communication transformer are connected in parallel.

13. The PLC module according to claim 12, characterized in that, The primary winding of the first or second communication transformer is connected to a filter circuit.

14. The PLC module according to claim 12, characterized in that, The primary winding of the first communication transformer includes a third winding and a fourth winding arranged in parallel; the first drive circuit is connected to the third winding; The primary winding of the second communication transformer includes a fifth winding and a sixth winding arranged in parallel; the second drive circuit is connected to the fifth winding.

15. The PLC module according to claim 14, characterized in that, The fourth winding or the sixth winding is connected to a filter circuit.

16. The PLC module according to claim 12, characterized in that, The first drive circuit includes multiple components, and the first communication transformer includes multiple components. Each first drive circuit is connected to the primary winding of the corresponding first communication transformer. The second drive circuit includes multiple components, and the second communication transformer includes multiple components. Each second drive circuit is connected to the primary winding of the corresponding second communication transformer.

17. The PLC module according to claim 16, characterized in that, Each of the first communication transformers includes multiple primary windings arranged in parallel, and the first drive circuit is connected to one of the primary windings of the corresponding first communication transformer. Each of the second communication transformers includes multiple primary windings arranged in parallel, and the second drive circuit is connected to one of the primary windings of the corresponding second communication transformer.

18. The PLC module according to claim 16, characterized in that, The secondary windings of multiple first communication transformers are connected in parallel, and the secondary windings of multiple second communication transformers are connected in parallel.

19. The PLC module according to claim 16, characterized in that, The first driving circuit and the second driving circuit have the same number of circuits.

20. A debugging method for a PLC module, characterized in that, The method is applied to the PLC controller of a PLC module; the method includes: Identify a target driving circuit; wherein the target driving circuit includes: at least one first driving circuit and at least one second driving circuit; The debugging signal is sent to the target drive circuit, which amplifies the debugging signal before transmitting it to the power line; wherein the power line is connected to the power equipment. The system receives communication quality parameters returned by the power equipment and, based on these parameters, determines the number of the first drive circuits and the number of the second drive circuits that need to be started in the PLC module.

21. The method according to claim 20, characterized in that, Before the step of sending the debugging signal to the target drive circuit, the method further includes: controlling the filter circuit in the PLC module to disconnect; The step of receiving the communication quality parameters returned by the power equipment includes: The filter circuit in the PLC module is turned on, and the communication quality parameters returned by the power equipment are received through the filter circuit. The communication quality parameters are then filtered and sent to the PLC controller.

22. The method according to claim 20, characterized in that, Before the step of sending the debug signal to the target drive circuit, the method further includes: adjusting the signal strength of the debug signal.

23. The method according to claim 20, characterized in that, The power line connects the inverter and the combiner box; the communication quality parameters include at least one of the following: The noise parameters of the signal coupling point between the inverter and the combiner box, the noise parameters of the receiver of the combiner box, and the noise parameters of the inverter.

24. The method according to claim 20, characterized in that, The power line connects the power transformer and the inverter; the communication quality parameters include at least one of the following: The noise parameters of the signal coupling point between the power transformer and the inverter, the noise parameters of the inverter receiver, and the noise parameters of the power transformer.

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