Power carrier communication module power supply voltage control method and device and power converter

Abstract

The invention relates to a power carrier communication module power supply voltage control method and device and a power converter. The method comprises the following steps: acquiring a communication quality indication parameter fed back by network control equipment, wherein the communication quality indication parameter is used for representing communication quality in a direction from a power converter to the network control equipment; the power supply voltage of the power line carrier communication module is determined based on the communication quality indication parameter, and the adjustment strategy of the power supply voltage and the communication quality indicated by the communication quality indication parameter present an overall negative adjustment trend. The method can improve the power generation efficiency of the power converter.

Description

Technical Field

[0001] This application relates to the field of power line carrier communication technology, and in particular to a power line carrier communication module power supply voltage control method, device and power converter. Background Technology

[0002] In scenarios where photovoltaic (PV) inverters are installed on rooftops, wireless communication between the PV inverter and the gateway device can suffer from poor communication quality due to shading issues. Therefore, related technologies employ power line carrier communication, where the PV inverter and gateway device communicate via power lines. However, power line carrier communication consumes power, reducing the PV inverter's power generation efficiency. Summary of the Invention

[0003] Therefore, it is necessary to provide a power supply voltage control method, device, and power converter for power line carrier communication modules that can improve power generation efficiency, addressing the aforementioned technical problems.

[0004] In a first aspect, this application provides a power supply voltage control method for a power line carrier communication module, used in a power converter including a power line carrier communication module, wherein the power converter is communicatively connected to a network control device via the power line carrier communication module; the method includes: [The method is used in a power converter including a power line carrier communication module, wherein the power converter is communicatively connected to a network control device via the power line carrier communication module, and the method includes:]

[0005] Obtain communication quality indication parameters fed back by the network control device. These parameters characterize the communication quality from the power converter to the network control device.

[0006] Based on the communication quality indication parameters, the power supply voltage of the power line carrier communication module is determined. The adjustment strategy of the power supply voltage and the communication quality indicated by the communication quality indication parameters show an overall negative adjustment trend.

[0007] In one embodiment, determining the power supply voltage of the power line carrier communication module based on communication quality indication parameters includes:

[0008] If the communication quality indicator parameter is greater than the first parameter threshold, the power supply voltage of the power line carrier communication module is reduced from the current power supply voltage to the first power supply voltage according to the first adjustment step size.

[0009] In one embodiment, determining the power supply voltage of the power line carrier communication module based on communication quality indication parameters includes:

[0010] If the communication quality indicator parameter is less than the second parameter threshold, the power supply voltage of the power line carrier communication module is increased from the current power supply voltage to the second power supply voltage according to the second adjustment step size.

[0011] In one embodiment, determining the power supply voltage of the power line carrier communication module based on communication quality indication parameters includes:

[0012] Based on the communication quality indication parameters and the preset mapping relationship, the third power supply voltage is determined, and the current power supply voltage of the power line carrier communication module is adjusted to the third power supply voltage. The preset mapping relationship includes a monotonically decreasing relationship between the power supply voltage and the communication quality indication parameters.

[0013] In one embodiment, determining the power supply voltage of the power line carrier communication module based on communication quality indication parameters includes:

[0014] If a number of consecutive preset communication quality indicator parameters indicate that the power supply voltage needs to be adjusted in the first direction, the power supply voltage is adjusted in the first direction, which is either increasing or decreasing.

[0015] In one embodiment, the method further includes:

[0016] The boost command sent by the network control device is obtained. The boost command is used to indicate that the network control device has not received the communication signal sent by the power converter within a timeout period.

[0017] Based on the boost command, the power supply voltage of the power line carrier communication module is increased from the current power supply voltage to the fourth power supply voltage.

[0018] In one embodiment, the power converter includes a feedback circuit and a power supply circuit, and determines the supply voltage of the power line carrier communication module based on communication quality indication parameters, including:

[0019] The feedback circuit obtains a feedback voltage signal based on communication quality indication parameters;

[0020] The power supply circuit outputs the power line carrier communication module's power supply voltage based on the feedback voltage signal.

[0021] In one embodiment, the method further includes:

[0022] When the power converter is in a non-generating state, the current supply voltage of the power line carrier communication module is increased to the fifth supply voltage, which is the maximum supply voltage corresponding to the power line carrier communication module.

[0023] In one embodiment, the method further includes:

[0024] When the current power supply voltage of the power line carrier communication module is the fifth power supply voltage and the communication quality indication parameter is less than the third parameter threshold, the target transmission power is determined based on the noise power fed back by the network control device and the fourth parameter threshold.

[0025] Increase the transmit power of the power line carrier communication module from the current transmit power to the target transmit power;

[0026] The fifth power supply voltage is the maximum power supply voltage corresponding to the power line carrier communication module.

[0027] Secondly, this application provides a power supply voltage control method for a power line carrier communication module, used in a network control device, where the network control device and a power converter communicate based on a power line carrier communication protocol; the method includes: sending communication quality indication parameters to the power converter, the communication quality indication parameters being used to characterize the communication quality from the power converter to the network control device, the communication quality indication parameters being used by the power converter to determine the power supply voltage of the power line carrier communication module in the power converter based on the communication quality indication parameters, and the adjustment strategy of the power supply voltage and the communication quality indicated by the communication quality indication parameters showing an overall negative adjustment trend.

[0028] Thirdly, this application also provides a power supply device for a power line carrier communication module, which is used in a power converter including a power line carrier communication module, and the power converter is communicatively connected to a network control device through the power line carrier communication module.

[0029] The device is used to acquire communication quality indication parameters fed back by the network control device. The communication quality indication parameters are used to characterize the communication quality from the power converter to the network control device. Based on the communication quality indication parameters, the power supply voltage of the power line carrier communication module is determined. The adjustment strategy of the power supply voltage and the communication quality indicated by the communication quality indication parameters show an overall negative adjustment trend.

[0030] In one embodiment, the device includes a feedback circuit and a power supply circuit;

[0031] The feedback circuit is used to acquire communication quality indication parameters, and, based on the communication quality indication parameters, to obtain a feedback voltage signal;

[0032] The power supply circuit is used to output the power supply voltage for the power line carrier communication module based on the feedback voltage signal.

[0033] Fourthly, this application also provides a power converter, including a power line carrier communication module and a power supply device for the power line carrier communication module provided in the second aspect.

[0034] The aforementioned power line carrier communication module supply voltage control method, apparatus, and power converter are used in a power converter including a power line carrier communication module. This power converter is communicatively connected to a network control device via the power line carrier communication module. By acquiring communication quality indication parameters fed back by the network control device, the power supply voltage of the power line carrier communication module is determined based on these parameters. The supply voltage monotonically decreases as the communication quality indicated by the communication quality indication parameters increases. Thus, when the communication quality indication information fed back by the network control device indicates good uplink communication quality, the supply voltage of the power line carrier communication module in the power converter is reduced to decrease the power consumption of the power line carrier communication module and improve the power generation efficiency of the power converter. When the communication quality indication information fed back by the network control equipment indicates poor communication quality in the uplink direction, the supply voltage of the power line carrier communication module in the power converter is increased to improve the effective value of the communication signal and ensure communication quality. This avoids the problem in related technologies where the supply voltage of the power line carrier communication module is fixed and directly set to a large voltage to ensure communication quality, resulting in low power converter generation efficiency. By using the above method to determine the supply voltage of the power line carrier communication module through communication quality information, a smaller supply voltage can be selected while ensuring communication quality from the power converter to the network control equipment, reducing the power consumption of the power line carrier communication module, and thus improving the power converter generation efficiency. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A diagram illustrating the application environment of a power line carrier communication module supply voltage control method in one embodiment;

[0037] Figure 2 A flowchart illustrating the power supply voltage control method for a power line carrier communication module in one embodiment;

[0038] Figure 3 A schematic diagram illustrating the power supply voltage control process for the power line carrier communication module in another embodiment;

[0039] Figure 4 This is a schematic block diagram of a power converter in one embodiment;

[0040] Figure 5 This is a schematic block diagram of the power converter in another embodiment;

[0041] Figure 6 This is a diagram of the internal structure of an electronic device in one embodiment. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure.

[0044] It is understood that the terms "first," "second," etc., as used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this disclosure, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0045] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0046] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0047] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0048] The power line carrier communication module power supply voltage control method provided in this application embodiment can be applied to, for example... Figure 1In the application environment shown, the power converter 100 is connected to the photovoltaic module 200, converting the DC power output from the photovoltaic module 200 into AC power. The power converter 100 is connected to the power grid 400 via a network control device 300. The power converter 100 includes a PowerLine Communication (PLC) module 110, a power supply unit 120, and a power conversion circuit 130. The power supply unit 120 supplies power to the powerline communication module 110, and the power conversion circuit 130 converts the DC power output from the photovoltaic module 200 into AC power. The power converter 100 communicates with the network control device 300 via the powerline communication module 110. The network control device 300 also includes a corresponding PLC module. For example, the network control device 300 includes a PLC module and a relay. The network control device 300 can be used to monitor the operating status of the power converter 100 and control its output power.

[0049] In some embodiments, the power converter 100 may be a photovoltaic inverter. Exemplarily, the power converter 100 is a single-phase inverter connected to one phase of the AC bus. Exemplarily, the power converter 100 is a three-phase inverter connected to all three phases of the AC bus.

[0050] In some embodiments, the power converter 100 may also be connected to the load via a network control device 300. In some embodiments, the power converter 100 may also be connected to other types of new energy power generation equipment.

[0051] In some embodiments, the network control device 300 may be referred to as a data collector, a gateway controller, or a system controller.

[0052] In one exemplary embodiment, such as Figure 2 As shown, a power line carrier communication module power supply voltage control method is provided, which is applied to... Figure 1 The power converter 100 shown is used as an example for explanation. The power converter 100 communicates with the network control device via an internally configured power line carrier communication module. The method includes steps 202 to 204. Wherein:

[0053] Step 202: Obtain the communication quality indication parameters fed back by the network control device.

[0054] The communication quality indication parameter is used to characterize the communication quality from the power converter to the network control device. For ease of description, in this embodiment, the communication direction from the power converter to the network control device is referred to as the uplink direction, and the communication direction from the network control device to the power converter is referred to as the downlink direction.

[0055] In this embodiment, when the network control device receives a data frame from the power converter, it determines the uplink communication quality indication parameters based on the signal characteristics during demodulation to monitor communication quality. In this embodiment, the network control device feeds back the calculated communication quality indication parameters to the power line carrier communication module in the power converter.

[0056] For example, the communication quality indicator parameter can be the Link Quality Indicator (LQI) parameter or the Signal-to-Noise Ratio (SNR) parameter. In these examples, a larger value of the communication quality indicator parameter indicates better uplink communication quality, and a smaller value indicates worse uplink communication quality.

[0057] For example, the communication quality indicator parameter can be the bit error rate (BER) or the frame error rate (FER). In these examples, a larger value of the communication quality indicator parameter indicates a worse uplink communication quality, and a smaller value indicates a better uplink communication quality.

[0058] Step 204: Determine the power supply voltage of the power line carrier communication module based on the communication quality indication parameters.

[0059] Among them, the adjustment strategy of power supply voltage and the communication quality indicated by the communication quality indicator parameters show an overall negative adjustment trend.

[0060] In this application, unless otherwise specified, a communication quality indicator parameter with a positive correlation between its value and communication quality is used as an example to illustrate the process of determining the power supply voltage of the power line carrier communication module based on the communication quality indicator parameter. Those skilled in the art can clearly deduce from the embodiments provided in this application how the power supply voltage of the power line carrier communication module is determined based on the communication quality indicator parameter with a negative correlation between its value and communication quality.

[0061] In one possible implementation, the power supply voltage adjustment strategy exhibits an overall negative adjustment trend with respect to the communication quality indicated by the communication quality indicator parameter, including: the power supply voltage decreases as the communication quality indicated by the communication quality indicator parameter increases. That is, there is a negative correlation between the power supply voltage and the communication quality indicated by the communication quality indicator parameter; for example, when the first communication quality indicator parameter is greater than the second communication quality indicator parameter, the first power supply voltage corresponding to the first communication quality indicator parameter is greater than the second power supply voltage corresponding to the second communication quality indicator parameter.

[0062] In another possible implementation, the power supply voltage adjustment strategy exhibits an overall negative adjustment trend with respect to the communication quality indicated by the communication quality indicator parameter. This includes a stepwise monotonically decreasing power supply voltage as the communication quality indicated by the parameter increases. For example, based on the range of values ​​for the communication quality indicator parameter, multiple quality intervals are defined, with each interval corresponding to a power supply voltage. Another example is the pre-setting of a parameter threshold. The current communication quality is determined by the relationship between the threshold and the current communication quality indicator parameter. A smaller power supply voltage is determined when the communication quality is good, and a larger power supply voltage is determined when the communication quality is poor. In this implementation, the power supply voltage and the communication quality indicated by the parameter exhibit a stepwise correlation. This approach reduces the power supply voltage while ensuring communication quality, and avoids excessively frequent voltage adjustments, thus improving the stability of the power supply voltage.

[0063] In another possible implementation, the power supply voltage adjustment strategy exhibits an overall negative adjustment trend with respect to the communication quality indicated by the communication quality indicator parameter. This includes: the adjustment direction of the power supply voltage is determined by a preset range to which the communication quality indicator parameter belongs, and a voltage reduction operation is performed in the high-quality parameter range, while a voltage increase operation is performed in the low-quality parameter range. For example, based on the value range of the communication quality indicator parameter, three quality ranges are divided. In the quality range with larger values, the power supply voltage decreases; in the quality range with smaller values, the power supply voltage increases; and in the middle quality range, the power supply voltage remains unchanged.

[0064] In one possible implementation, a selectable voltage range is set for the power supply voltage of the power converter's power line carrier communication module. The upper and lower limits of this voltage range can be determined based on engineering experiments. The power supply voltage is adjusted within this preset voltage range.

[0065] In one possible implementation, the power supply voltage of the power line carrier communication module in the network control device is set to a relatively high fixed value to ensure that the power converter can receive the communication signals sent by the network control device. For example, the power supply voltage of the power line carrier communication module in the network control device is the upper limit of the aforementioned voltage range.

[0066] The power line carrier communication module supply voltage control method provided in the above embodiments is used in a power converter including a power line carrier communication module. The power converter is communicatively connected to a network control device via the power line carrier communication module. By acquiring communication quality indication parameters fed back by the network control device, the supply voltage of the power line carrier communication module is determined based on these parameters. The supply voltage monotonically decreases as the communication quality indicated by the communication quality indication parameters increases. Thus, when the communication quality indication information fed back by the network control device indicates good uplink communication quality, the supply voltage of the power line carrier communication module in the power converter is reduced to reduce the power consumption of the power line carrier communication module and improve the power generation efficiency of the power converter. When the communication quality indication information fed back by the control device indicates poor communication quality in the uplink direction, the supply voltage of the power line carrier communication module in the power converter is increased to improve the effective value of the communication signal and ensure communication quality. This avoids the problem in related technologies where the supply voltage of the power line carrier communication module is fixed and directly set to a large voltage to ensure communication quality, resulting in low power converter generation efficiency. By using the method provided in the above embodiment to determine the supply voltage of the power line carrier communication module through communication quality information, a smaller supply voltage can be selected while ensuring communication quality from the power converter to the network control device, reducing the power consumption of the power line carrier communication module and thus improving the power converter generation efficiency.

[0067] In one exemplary embodiment, based on Figure 2 The embodiment shown provides a power line carrier communication module supply voltage control method that involves determining the supply voltage of the power line carrier communication module based on communication quality indication information. This process includes: when the communication quality indication parameter is greater than a first parameter threshold, reducing the supply voltage of the power line carrier communication module from the current supply voltage to a first supply voltage according to a first adjustment step size.

[0068] In this embodiment, the magnitude of the communication quality indication parameter is positively correlated with the communication quality. When the communication quality indication parameter is greater than the first parameter threshold, the supply voltage is reduced according to a preset first adjustment step size.

[0069] For example, the communication quality indicator parameter uses LQI, with a value range of 0-255, a first parameter threshold of 220, a first adjustment step of 0.2V, and a current supply voltage of 12V. If the first received LQI is greater than 220, the current supply voltage is reduced by 0.2V to obtain a first supply voltage of 11.8V, and the power line carrier communication module is powered according to 11.8V. If the second received LQI is still greater than 220V, the current supply voltage is 11.8V, and then reduced by another 0.2V. This process continues until the received LQI is less than or equal to 220.

[0070] In one possible implementation, if the current power supply voltage is already the preset minimum power supply voltage, and the obtained communication quality indication parameter is greater than the first parameter threshold, the first power supply voltage obtained by reducing the first adjustment step size according to the current power supply voltage is still the minimum power supply voltage.

[0071] In one possible implementation, the first adjustment step size is a fixed value, determined based on engineering experience.

[0072] In one possible implementation, there are multiple first adjustment steps, and the values ​​of each first adjustment step are different. For example, a first adjustment step currently used to adjust the power supply voltage is determined based on the difference between the current communication quality indication parameter and the first parameter threshold. Another example is that a first adjustment step currently used to adjust the power supply voltage is selected based on the cumulative number of consecutive adjustments that have been made in the decreasing direction.

[0073] In this embodiment, no specific mapping relationship is preset between the communication quality indicator parameter and the power supply voltage. The current communication quality is determined by the relationship between the communication quality indicator parameter and the preset parameter threshold. If the communication quality indicator parameter is greater than the first parameter threshold, the communication quality is considered to be good. The current power supply voltage can be reduced to lower the power supply voltage of the power line carrier communication module and improve the communication quality.

[0074] In one exemplary embodiment, based on Figure 2 The embodiment shown provides a power line carrier communication module supply voltage control method that involves determining the supply voltage of the power line carrier communication module based on communication quality indication information. This process includes: when the communication quality indication parameter is less than a second parameter threshold, increasing the supply voltage of the power line carrier communication module from the current supply voltage to a second supply voltage according to a second adjustment step size.

[0075] In this embodiment, the magnitude of the communication quality indication information is positively correlated with the communication quality. When the communication quality indication parameter is less than the second parameter threshold, the power supply voltage is increased according to a preset second adjustment step size.

[0076] For example, the communication quality indicator parameter uses LQI, with a value range of 0-255. The second parameter threshold is 120, the second adjustment step is 0.2V, and the current supply voltage is 8.5V. If the first received LQI is less than 120, the current supply voltage is increased by 0.2V to obtain a first supply voltage of 8.7V, which is used to power the power line carrier communication module. If the second received LQI is still less than 120, the current supply voltage is 8.7V, and then increased by another 0.2V. This process continues until the received LQI is greater than or equal to 120.

[0077] In one possible implementation, if the current power supply voltage is already the preset maximum power supply voltage, and the obtained communication quality indication parameter is less than the second parameter threshold, the second power supply voltage obtained by increasing the second adjustment step size according to the current power supply voltage is still the maximum power supply voltage.

[0078] In one possible implementation, the second adjustment step size is a fixed value determined based on engineering experience.

[0079] In one possible implementation, there are multiple second adjustment steps. In this implementation, the determination of the second adjustment step corresponding to the current adjustment process is similar to the implementation in which there are multiple first adjustment steps, and will not be described again here.

[0080] In this embodiment, no specific mapping relationship is preset between the communication quality indicator parameter and the power supply voltage. The current communication quality is determined by the relationship between the communication quality indicator parameter and the preset parameter threshold. If the communication quality indicator parameter is less than the second parameter threshold, the communication quality is considered to be poor. The current power supply voltage can be increased to improve the effective value of the communication signal and ensure the communication quality.

[0081] In one possible implementation, the adjustment step size for each adjustment process can be determined based on the adjustment step size for the previous adjustment process. For example, the initial value of the power supply voltage is set to the minimum value within a preset power supply voltage range. If, for the first time, the communication quality indicator parameter is less than a second parameter threshold, the power supply voltage is adjusted to the maximum value within the preset power supply voltage range. That is, the second adjustment step size for the current process is the entire span of the preset power supply voltage range. After adjusting the power supply voltage to this maximum value, if the communication quality indicator parameter is found to be greater than a first parameter threshold, the previous adjustment step size is halved to obtain the current first adjustment step size, and the current power supply voltage is reduced by the first adjustment step size. In other words, a power supply voltage suitable for the current power line carrier communication environment is gradually obtained within the preset power supply voltage range using a bisection method.

[0082] In the embodiments of this application, the terms "first" and "second" in the first adjustment step size and the second adjustment step size are used to describe the adjustment step size in the voltage decreasing direction and the adjustment step size corresponding to the voltage increasing direction, respectively. "First" and "second" are not used to limit the size of the adjustment step size, the order of adjustment, etc.

[0083] In one exemplary embodiment, based on Figure 2 The embodiment shown provides a power line carrier communication module power supply voltage control method that involves determining the power supply voltage of the power line carrier communication module based on communication quality indication information. This process includes: determining a third power supply voltage based on communication quality indication parameters and a preset mapping relationship, and adjusting the current power supply voltage of the power line carrier communication module to the third power supply voltage. In this embodiment, the third power supply voltage refers to the power supply voltage determined according to the preset mapping relationship and the obtained communication quality indication information; the term "third" in the third power supply voltage does not limit the magnitude of the power supply voltage, the time of determination of the power supply voltage, etc.

[0084] The preset mapping relationship includes a monotonically decreasing relationship between the power supply voltage and the communication indication parameter. That is, when the first communication indication parameter is less than the second communication indication parameter, the power supply voltage corresponding to the first communication indication parameter is not less than the power supply voltage corresponding to the second communication indication parameter; when the first communication indication parameter is greater than the second communication indication parameter, the power supply voltage corresponding to the first communication indication parameter is not greater than the power supply voltage corresponding to the second communication indication parameter.

[0085] In one possible implementation, the preset mapping relationship includes a linear negative correlation. In this implementation, the preset mapping relationship includes the following: when the first communication indication parameter is less than the second communication indication parameter, the power supply voltage corresponding to the first communication indication parameter is greater than the power supply voltage corresponding to the second communication indication parameter; when the first communication indication parameter is greater than the second communication indication parameter, the power supply voltage corresponding to the first communication indication parameter is less than the power supply voltage corresponding to the second communication indication parameter.

[0086] In one possible implementation, the preset mapping relationship includes a non-linear relationship. In this embodiment, the communication quality parameters are divided into multiple quality intervals, each corresponding to a different power supply voltage. Communication quality indicators within the same quality interval correspond to the same power supply voltage. Overall, the communication quality parameters and the power supply voltage are negatively correlated. For example, the preset mapping relationship includes a piecewise function; further example, the preset mapping relationship includes a list mapping relationship.

[0087] In this embodiment, a mapping relationship between communication indication parameters and power supply voltage is preset. When the communication quality indication parameter is obtained, the power supply voltage corresponding to the communication quality indication parameter is determined according to the mapping relationship, and the current power supply voltage of the power line carrier communication module is adjusted to the power supply voltage. This allows the power supply voltage to be quickly adjusted to a voltage value that satisfies both communication quality and power generation efficiency.

[0088] In one exemplary embodiment, based on Figure 2 The embodiment shown provides a power line carrier communication module power supply voltage control method that involves determining the power supply voltage of the power line carrier communication module based on communication quality indication information. This process includes: adjusting the power supply voltage in the first direction when a consecutive preset number of communication quality indication parameters indicate that the power supply voltage needs to be adjusted in a first direction. Here, the first direction is either increasing or decreasing. For ease of description in subsequent embodiments, the preset number will be denoted as N.

[0089] For example, if N consecutive communication quality indicator parameters are all greater than the first parameter threshold, the power supply voltage of the power line carrier communication module is reduced from the current power supply voltage to the first power supply voltage according to the first adjustment step size.

[0090] For example, if N consecutive communication quality indication parameters are all less than the second parameter threshold, the power supply voltage of the power line carrier communication module is increased from the current power supply voltage to the second power supply voltage according to the second adjustment step size.

[0091] In an exemplary embodiment of determining the third power supply voltage according to a preset mapping relationship, for example, if the power supply voltage determined according to the communication quality indication parameter is lower than the current power supply voltage for N consecutive times, then the third power supply voltage is determined based on these N power supply voltages determined according to the preset relationship, and the current power supply voltage of the power line carrier communication module is adjusted to the third power supply voltage.

[0092] In this embodiment, if it is determined multiple times that the same adjustment of the supply voltage is required, the supply voltage is adjusted in that direction only, thus avoiding excessively frequent adjustments of the supply voltage and improving the stability of the power converter operation.

[0093] In one exemplary embodiment, based on Figure 2 The embodiment shown further includes steps 302 to 304 in the power line carrier communication module power supply voltage control method. Figure 3 As shown.

[0094] Step 302: Obtain the boost command sent by the network control device. The boost command indicates that the network control device has timed out and has not received a communication signal from the power converter.

[0095] Step 304: Based on the boost command, increase the power supply voltage of the power line carrier communication module from the current power supply voltage to the fourth power supply voltage.

[0096] In this embodiment, during the communication interaction between the power converter and the network control device, if the network control device does not receive the communication signal sent by the power converter within a timeout period, the network control device will send a boost command to the power converter, causing the power converter to increase the power supply voltage of the power line carrier communication module based on the boost command.

[0097] In this embodiment, the power supply voltage of the power line carrier communication module in the network control device is set to the maximum value of the adjustable power supply voltage range to ensure the communication quality from the network control device to the power converter. Therefore, in this embodiment, the power converter can generally receive the communication signals sent by the network control device. Because the power supply voltage of the power line carrier communication module in the power converter is adjustable, if the network control device does not receive the communication signal sent by the power converter within a timeout period, it can be assumed that the effective value of the communication signal sent by the power converter is small, that is, the power supply voltage of the power line carrier communication module in the power converter is small. Therefore, the network control device uses a boost command to enable the power converter to provide the power supply voltage of the power line carrier communication module to increase the effective value of the uplink communication signal, thereby improving the communication quality in the uplink direction.

[0098] In an exemplary embodiment, the power converter in which the provided power line carrier communication module supply voltage control method is applied includes a feedback circuit 121 and a power supply circuit 122. The input terminal of the feedback circuit 121 is connected to the power line carrier communication module 110, the output terminal of the feedback circuit 121 is connected to the feedback input terminal of the power supply circuit 122, the power input terminal of the power supply circuit 122 is connected to the corresponding DC bus of the power converter 100, and the output terminal of the power supply circuit 122 is connected to the power line carrier communication module.

[0099] In this embodiment, the process by which the power converter determines the power supply voltage of the power line carrier communication module based on the communication quality indication parameters includes: the feedback circuit obtaining a feedback voltage signal based on the communication quality indication parameters, and the power supply circuit outputting the power supply voltage of the power line carrier communication module based on the feedback voltage signal.

[0100] In some implementation methods, please refer to Figure 5 The feedback circuit 121 is implemented based on the microcontroller 1211. In some examples of these implementations, the feedback circuit is connected to the microcontroller's DA (Digital-to-Analog) pin; the microcontroller obtains a feedback voltage signal in analog form based on communication quality indication parameters and outputs it to the power supply circuit. In some examples of these implementations, the feedback circuit is connected to the microcontroller 1211's General Purpose Input Output (GPIO) pin or PWM (Pulse Width Modulator) output pin, such as... Figure 5 As shown. Among them. Figure 5 The example provided illustrates a feedback circuit connected to the PWM pin of a microcontroller 1211. In these examples, the feedback circuit includes the microcontroller 1211 and a corresponding filter circuit. The microcontroller outputs a duty cycle voltage based on communication quality indication parameters, and the filter circuit filters this duty cycle voltage to obtain the feedback voltage signal. Please refer to [reference needed]. Figure 4 The filter circuit is an RC filter circuit that includes resistor R4 and capacitor C1.

[0101] For example, the microcontroller 1211 communicates with the power line carrier communication module 110 based on the Universal Asynchronous Receiver / Transmitter (UART) protocol.

[0102] In some implementation methods, please refer to Figure 5The power supply circuit 122 includes an auxiliary power chip 1221 with voltage feedback characteristics and corresponding peripheral circuitry. Vo is the supply voltage output by the auxiliary power chip 1221, and FB refers to the feedback input terminal of the auxiliary power chip 1221. The peripheral circuitry includes resistors R1, R2, and R3. The output terminal of the auxiliary power chip 1221 is connected to the first terminal of resistor R1, and the feedback input terminal of the auxiliary power chip 1221 is connected to the second terminal of resistor R1, the first terminal of resistor R2, and the first terminal of resistor R3. The second terminal of resistor R2 is grounded, and the second terminal of resistor R3 is connected to the output terminal of the feedback circuit 121.

[0103] For example, auxiliary power chip 1221 uses a BUCK power chip.

[0104] In the power line carrier communication module power supply voltage control method provided in the above embodiments, the process of determining the power supply voltage of the power line carrier communication module based on communication quality indication parameters is realized through the feedback circuit and power supply circuit in the power converter, thereby decoupling the feedback module and the voltage output module and improving the stability of the power supply voltage control process.

[0105] In one possible implementation, when the communication quality indication parameter is greater than the first parameter threshold, the feedback circuit 121 reduces the amplitude of the feedback voltage signal by a first adjustment step, thereby reducing the power supply voltage output by the power supply circuit from the current power supply voltage to the first power supply voltage.

[0106] In one possible implementation, when the communication quality indication parameter is less than the second parameter threshold, the feedback circuit 121 increases the amplitude of the feedback voltage signal by a second adjustment step, thereby increasing the power supply voltage output by the power supply circuit 122 from the current power supply voltage to the second power supply voltage.

[0107] In one possible implementation, when a preset number of communication quality indication parameters indicate that the power supply voltage needs to be adjusted in the first direction, the feedback circuit 121 adjusts the amplitude of the feedback voltage signal in the first direction, thereby causing the power supply voltage of the power supply circuit 122 to change in the first direction.

[0108] In one possible implementation, when the feedback circuit 121 receives a boost command, it adjusts the amplitude of the feedback voltage signal based on the boost command, thereby increasing the power supply voltage output by the power supply circuit 122 from the current power supply voltage to the fourth power supply voltage.

[0109] In one possible implementation, the feedback circuit 121 determines the third supply voltage based on the communication quality indication parameters and the preset mapping relationship, and outputs a feedback voltage signal that enables the power supply circuit 122 to output the third supply voltage to the power supply circuit.

[0110] In one exemplary embodiment, based on Figure 2 The embodiment shown further includes a power line carrier communication module supply voltage control method that, when the power converter is in a non-generating state, increases the current supply voltage of the power line carrier communication module to a fifth supply voltage. The fifth supply voltage is the maximum supply voltage corresponding to the power line carrier communication module.

[0111] The non-generating state of the power converter includes being in standby mode or in a commanded shutdown state. For example, for inverters used in photovoltaic modules, standby mode includes morning / evening standby mode or commanded standby mode. Morning / evening standby mode refers to the inverter's operating state switching between preparing to generate electricity and stopping generation around sunrise and sunset when the light intensity is at a critical point. Alternatively, the inverter may be in standby mode before it receives a grid code and begins generating electricity, such as when it is first used and requires a local grid code from the gateway to start generation.

[0112] In one possible implementation, the operating state of the power converter is determined by detecting its power generation capacity. For example, if the power converter's power generation capacity is less than a preset power threshold, the power converter is considered to be in a non-power generation state, such as a shutdown or standby state. The preset power threshold can be determined based on the power converter's startup power threshold; for example, the preset power threshold can be a very small value close to zero; or, for example, the preset power value can be set to be less than the minimum output power of the power converter during normal grid-connected power generation. As another example, if the power converter's power generation capacity is less than the preset power threshold for a certain period of time, the power converter is considered to be in a non-power generation state.

[0113] In this embodiment, when the power converter is in a non-generating state, the current supply voltage of the power line carrier communication module is set to the maximum supply voltage that the module can achieve, thereby improving the uplink communication quality of the power converter; when the power converter is in a generating state, according to Figure 2 The implementation shown determines the power supply voltage of the power line carrier communication module based on communication quality indication parameters.

[0114] In one exemplary embodiment, based on Figure 2 The embodiment shown further includes a power supply voltage control method for a power line carrier communication module, which further includes: determining a target transmission power based on noise power fed back by the network control device and a fourth parameter threshold when the current power supply voltage of the power line carrier communication module is a fifth power supply voltage and the communication quality indication parameter is less than a third parameter threshold; and increasing the transmission power of the power line carrier communication module from the current transmission power to a first transmission power.

[0115] In some cases, when the power line carrier communication module's current supply voltage is the fifth supply voltage (meaning it's already at the maximum supply voltage within the preset adjustable range), if the communication quality indicator parameter fed back by the network control device is less than the third parameter threshold, it indicates that the uplink communication quality is still relatively poor. This situation may occur in complex scenarios such as high grid noise or heavy bus load due to a large number of power converters. Because the supply voltage is already at the maximum adjustable range, this embodiment improves the uplink communication quality by adjusting the transmission power of the power line carrier communication module. Specifically, based on the noise power calculated by the network control device and the user's desired communication quality indicator parameter, a target transmission power is determined, and the transmission power of the power line carrier communication module is increased from the current transmission power to the target transmission power to improve the uplink communication quality.

[0116] In one possible implementation, the third parameter threshold is as large as the second parameter threshold in the aforementioned embodiment. Thus, if the communication quality indication parameter is less than the second parameter threshold, and if the power supply voltage is not the maximum power supply voltage within the selectable range, the power supply voltage of the power line carrier communication module is increased by the second adjustment step to optimize the communication quality in the uplink communication direction. If the power supply voltage is already the maximum power supply voltage within the selectable range, the transmission power of the power line carrier communication module is adjusted to optimize the communication quality in the uplink communication direction.

[0117] In one possible implementation, the third parameter threshold is not equal to the second parameter threshold; for example, the third parameter threshold is greater than the second parameter threshold, or the third parameter threshold is less than the second parameter threshold. In this implementation, during the adjustment and control of the power line carrier communication module, the current power supply voltage is first determined. If the current power supply voltage has reached the maximum power supply voltage, then based on the third parameter threshold and the communication quality indication parameter, it is determined whether the current communication quality meets expectations.

[0118] The fourth parameter threshold represents the communication quality indicator parameter that the user expects to achieve after adjusting the power line carrier communication module's transmit power. In one possible implementation, the fourth parameter threshold is equal to the third parameter threshold. In another possible implementation, the fourth parameter threshold is greater than the third parameter threshold; thus, in this implementation, after determining the target transmit power according to the fourth parameter threshold, the uplink communication quality can reach a level higher than the third parameter threshold after adjusting the power line carrier communication module's transmit power, avoiding the need for frequent transmit power adjustments.

[0119] In one possible implementation, when the communication quality indicator parameter is SNR, the relationship between SNR and transmit power Ps and noise power Pn is as follows: , to obtain the transmission power .

[0120] In one possible implementation, when the communication quality indicator parameter is LQI, the relationship between LQI and SNR is as follows: , to obtain the transmission power .

[0121] The noise power is calculated by the network control device based on the grid noise. In one possible implementation, the network control device feeds back the current noise power to the power converter while feeding back the communication quality indication parameter. In another possible implementation, the network control device feeds back the current noise power while feeding back the communication quality indication parameter when the communication quality indication parameter is less than the third parameter threshold.

[0122] In one exemplary embodiment, a power line carrier communication module power supply voltage control method is provided, applying... Figure 1 In the network control device shown, communication between the network control device and the power converter is based on a power line carrier communication protocol. The method includes sending a communication quality indication parameter to the power converter. This communication quality indication parameter characterizes the communication quality from the power converter to the network control device, and is used by the power converter to determine the supply voltage of the power line carrier communication module within the power converter.

[0123] In an exemplary embodiment, the provided power line carrier communication module power supply voltage control method further includes: if the network control device fails to receive a communication signal sent by the power converter within a timeout period, it sends a boost command to the power converter so that the power converter increases the power supply voltage from the current power supply voltage to a fourth power supply voltage based on the boost command.

[0124] In an exemplary embodiment, the power supply voltage control method for the provided power line carrier communication module further includes sending noise power to the power converter during the process of sending communication quality indication parameters to the power converter.

[0125] In one possible implementation, the process of sending noise power to the power converter includes sending noise power to the power converter when the communication quality indication parameter is less than a third parameter threshold.

[0126] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps. It is understood that the steps in different embodiments can be freely combined as needed, and all non-contradictory solutions formed by such combinations are within the scope of protection of this application.

[0127] It is understood that the term "based on" as used in this application is used to describe one or more factors that influence the determination, but does not exclude other factors that may influence the determination. For example, the phrase "determine A based on B" means that the determination of A can be based entirely or at least partially on factor B. That is, B is a factor that influences the determination of A, but does not exclude the fact that the determination of A is also based on C.

[0128] Based on the same inventive concept, this application also provides a power supply device for implementing the power supply voltage control method for the power supply module of the aforementioned power line carrier communication module. The solution provided by this device is similar to the solution described in the above method. Therefore, the specific limitations in one or more power supply device embodiments provided below can be found in the limitations of the power supply voltage control method for the power line carrier communication module described above, and will not be repeated here.

[0129] In an exemplary embodiment, a power supply device for a power line carrier communication module is provided for acquiring communication quality indication parameters fed back by a network control device. The communication quality indication parameters are used to characterize the communication quality from the power converter to the network control device. Based on the communication quality indication parameters, the power supply voltage of the power line carrier communication module is determined, wherein the adjustment strategy of the power supply voltage and the communication quality indicated by the communication quality indication parameters exhibit an overall negative adjustment trend.

[0130] In an exemplary embodiment, the provided power supply device for the power line carrier communication module is used to reduce the power supply voltage of the power line carrier communication module from the current power supply voltage to the first power supply voltage according to a first adjustment step size when the communication quality indication parameter is greater than a first parameter threshold.

[0131] In an exemplary embodiment, the provided power supply device for the power line carrier communication module is used to reduce the power supply voltage of the power line carrier communication module from the current power supply voltage to the first power supply voltage according to a first adjustment step size when the communication quality indication parameter is greater than a first parameter threshold.

[0132] In an exemplary embodiment, the provided power supply device for the power line carrier communication module is used to increase the power supply voltage of the power line carrier communication module from the current power supply voltage to the second power supply voltage according to a second adjustment step size when the communication quality indication parameter is less than the second parameter threshold.

[0133] In an exemplary embodiment, the provided power supply device for the power line carrier communication module is used to determine a third power supply voltage based on communication quality indication parameters and a preset mapping relationship, and to adjust the current power supply voltage of the power line carrier communication module to the third power supply voltage. The preset mapping relationship includes a monotonically decreasing relationship between the power supply voltage and the communication quality indication parameters.

[0134] In an exemplary embodiment, the provided power line carrier communication module power supply device is used to adjust the power supply voltage in a first direction when a series of preset communication quality indication parameters indicate that the power supply voltage needs to be adjusted in a first direction, wherein the first direction is to increase or decrease.

[0135] In an exemplary embodiment, the provided power line carrier communication module power supply device is used to acquire a boost command sent by a network control device, the boost command being used to indicate that the network control device has not received a communication signal sent by the power converter within a timeout; based on the boost command, the power supply voltage of the power line carrier communication module is increased from the current power supply voltage to a fourth power supply voltage.

[0136] In one exemplary embodiment, please refer to Figure 4 The power supply device for the power line carrier communication module includes a feedback circuit 121 and a power supply circuit 122. The feedback circuit 121 is used to acquire communication quality indication parameters and, based on the communication quality indication parameters, obtain a feedback voltage signal. The power supply circuit 122 is used to output the power supply voltage of the power line carrier communication module based on the feedback voltage signal.

[0137] In an exemplary embodiment, the provided power supply device for the power line carrier communication module is used to increase the current supply voltage of the power line carrier communication module to a fifth supply voltage when the power converter is in a non-generating state. The fifth supply voltage is the maximum supply voltage corresponding to the power line carrier communication module.

[0138] In an exemplary embodiment, the provided power supply device for the power line carrier communication module is used to determine the target transmission power based on the noise power fed back by the network control device and the fourth parameter threshold when the current power supply voltage of the power line carrier communication module is the fifth power supply voltage and the communication quality indication parameter is less than the third parameter threshold; and to increase the transmission power of the power line carrier communication module from the current transmission power to the target transmission power; wherein, the fifth power supply voltage is the maximum power supply voltage corresponding to the power line carrier communication module.

[0139] Each module in the aforementioned power line carrier communication module power supply device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0140] In one exemplary embodiment, a power converter is provided, such as Figure 1 As shown, the power converter includes a power line carrier communication module and a power supply device for the power line carrier communication module provided in the aforementioned embodiments.

[0141] In one exemplary embodiment, an electronic device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 6 As shown, the electronic device includes a processor, memory, input / output interface, and communication interface. The processor, memory, and input / output interface are connected via a system bus, and the communication interface is connected to the system bus via the input / output interface. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, Near Field Communication (NFC), or other technologies. When the computer program is executed by the processor, it implements at least some steps of a power line carrier communication module power supply voltage control method.

[0142] Those skilled in the art will understand that Figure 6 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0143] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0144] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0145] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0146] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for controlling the power supply voltage of a power line carrier communication module, characterized in that, The method is used in a power converter including a power line carrier communication module, the power converter being communicatively connected to a network control device via the power line carrier communication module, the method comprising: Obtain the communication quality indication parameters fed back by the network control device, the communication quality indication parameters being used to characterize the communication quality from the power converter to the network control device; Based on the communication quality indication parameters, the power supply voltage of the power line carrier communication module is determined, wherein the adjustment strategy of the power supply voltage and the communication quality indicated by the communication quality indication parameters show an overall negative adjustment trend.

2. The method according to claim 1, characterized in that, Determining the power supply voltage of the power line carrier communication module based on the communication quality indication parameters includes: If the communication quality indication parameter is greater than the first parameter threshold, the power supply voltage of the power line carrier communication module is reduced from the current power supply voltage to the first power supply voltage according to the first adjustment step size.

3. The method according to claim 1 or 2, characterized in that, Determining the power supply voltage of the power line carrier communication module based on the communication quality indication parameters includes: If the communication quality indication parameter is less than the second parameter threshold, the power supply voltage of the power line carrier communication module is increased from the current power supply voltage to the second power supply voltage according to the second adjustment step size.

4. The method according to claim 1, characterized in that, Determining the power supply voltage of the power line carrier communication module based on the communication quality indication parameters includes: Based on the communication quality indication parameters and the preset mapping relationship, a third power supply voltage is determined, and the current power supply voltage of the power line carrier communication module is adjusted to the third power supply voltage. The preset mapping relationship includes a monotonically decreasing relationship between the power supply voltage and the communication quality indication parameters.

5. The method according to claim 1, characterized in that, Determining the power supply voltage of the power line carrier communication module based on the communication quality indication parameters includes: If a predetermined number of consecutive communication quality indication parameters indicate that the power supply voltage needs to be adjusted in a first direction, the power supply voltage is adjusted in the first direction, where the first direction is either increasing or decreasing.

6. The method according to claim 1, characterized in that, The method further includes: The boost command sent by the network control device is obtained, and the boost command is used to indicate that the network control device has not received the communication signal sent by the power converter within a timeout period; Based on the boost command, the power supply voltage of the power line carrier communication module is increased from the current power supply voltage to the fourth power supply voltage.

7. The method according to claim 1, characterized in that, The power converter includes a feedback circuit and a power supply circuit. Determining the power supply voltage of the power line carrier communication module based on the communication quality indication parameters includes: The feedback circuit obtains a feedback voltage signal based on the communication quality indication parameters; The power supply circuit outputs the power supply voltage for the power line carrier communication module based on the feedback voltage signal.

8. The method according to claim 1, characterized in that, The method further includes: When the power converter is in a non-generating state, the current supply voltage of the power line carrier communication module is increased to a fifth supply voltage, which is the maximum supply voltage corresponding to the power line carrier communication module.

9. The method according to claim 1, characterized in that, The method further includes: When the current power supply voltage of the power line carrier communication module is the fifth power supply voltage and the communication quality indication parameter is less than the third parameter threshold, the target transmission power is determined based on the noise power fed back by the network control device and the fourth parameter threshold. Increase the transmission power of the power line carrier communication module from the current transmission power to the target transmission power; The fifth power supply voltage is the maximum power supply voltage corresponding to the power line carrier communication module.

10. A method for controlling the power supply voltage of a power line carrier communication module, characterized in that, The method is used in a network control device, wherein the network control device communicates with a power converter based on a power line carrier communication protocol; the method includes: A communication quality indication parameter is sent to the power converter. The communication quality indication parameter is used to characterize the communication quality from the power converter to the network control device. The communication quality indication parameter is used by the power converter to determine the power supply voltage of the power line carrier communication module in the power converter based on the communication quality indication parameter. The adjustment strategy of the power supply voltage and the communication quality indicated by the communication quality indication parameter show an overall negative adjustment trend.

11. A power supply device for a power line carrier communication module, characterized in that, The device is used in a power converter including a power line carrier communication module, the power converter being communicatively connected to a network control device through the power line carrier communication module; The device is used to acquire communication quality indication parameters fed back by the network control device, the communication quality indication parameters being used to characterize the communication quality from the power converter to the network control device; based on the communication quality indication parameters, the power supply voltage of the power line carrier communication module is determined, wherein the adjustment strategy of the power supply voltage and the communication quality indicated by the communication quality indication parameters exhibit an overall negative adjustment trend.

12. The power supply device for the power line carrier communication module according to claim 11, characterized in that, The device includes a feedback circuit and a power supply circuit; The feedback circuit is used to acquire the communication quality indication parameters and, based on the communication quality indication parameters, obtain a feedback voltage signal. The power supply circuit is used to output the power supply voltage of the power line carrier communication module based on the feedback voltage signal.

13. A power converter, characterized in that, The power converter includes a power line carrier communication module and a power supply device for the power line carrier communication module as described in any one of claims 11-12.

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