Communication crosstalk suppression method and communication system

Abstract

The invention relates to a communication crosstalk suppression method and a communication system, and the method comprises the steps: firstly obtaining the communication state data of a target network during the communication crosstalk suppression, and judging whether there is crosstalk between the target network and other networks or not according to the communication state data. And under the condition that crosstalk exists between the target network and other networks, adjusting a communication signal of the target network according to the first signal adjustment mode, and synchronously obtaining a communication quality parameter after signal adjustment. And if the adjusted communication quality parameter of the communication signal does not meet the preset communication condition, adjusting the communication signal according to a second signal adjustment mode. Wherein the first signal adjusting mode and the second signal adjusting mode are different adjusting modes. According to the communication crosstalk suppression method, the signal adjustment mode can be flexibly selected according to the communication quality parameter and the preset communication quality condition, the quality of the communication signal during communication transmission is improved on the premise of ensuring reliable data transmission, and the transmission rate of the communication signal is improved.

Description

Technical Field

[0001] The present application relates to the field of communication transmission technology, and in particular to a communication crosstalk suppression method and a communication system. Background Art

[0002] Photovoltaic power generation is a power generation technology that converts solar energy into electrical energy. As a renewable energy source, photovoltaic power generation helps to meet the growing demand for electricity.

[0003] In photovoltaic systems, data can be transmitted between devices such as data loggers and power converters through power line communication (PLC) technology. PLC technology uses the existing power line infrastructure to superimpose communication data with power signals to achieve communication data transmission. However, when communicating through power lines, data between different devices may affect each other, causing crosstalk, affecting the transmission efficiency and quality of communication data. Traditional crosstalk suppression is relatively simple, using a fixed suppression method, which cannot be adjusted according to the actual communication quality and has poor flexibility. Summary of the invention

[0004] Based on this, it is necessary to provide a communication crosstalk suppression method and a communication system, which can reduce the crosstalk during PLC communication and improve the transmission rate of communication data while ensuring the transmission quality of communication data.

[0005] In a first aspect, the present disclosure provides a communication crosstalk suppression method, the method comprising:

[0006] Obtaining communication status data of the target network, and determining whether there is crosstalk between the target network and other networks based on the communication status data;

[0007] In the presence of crosstalk, adjusting the communication signal of the target network according to the first signal adjustment method, and obtaining a communication quality parameter of the adjusted communication signal;

[0008] If the communication quality parameter does not meet the preset communication quality condition, the communication signal is adjusted according to a second signal adjustment method; the first signal adjustment method and the second signal adjustment method are different.

[0009] In some embodiments, after adjusting the communication signal of the target network according to the first signal adjustment mode and obtaining the communication quality parameter of the adjusted communication signal, the method further includes:

[0010] Determine whether crosstalk still exists between the adjusted target network and other networks;

[0011] If crosstalk still exists and the communication quality parameter meets the preset communication quality condition, the communication signal of the target network is repeatedly adjusted according to the first signal adjustment method.

[0012] In some of the embodiments, when the first signal adjustment method is used to adjust the signal strength, adjusting the communication signal of the target network according to the first adjustment method includes: adjusting the transmission power of the communication signal to achieve a change in the communication signal strength by changing the transmission power;

[0013] or,

[0014] When the second signal adjustment method is used to adjust the signal strength, adjusting the communication signal of the target network according to the second adjustment method includes: adjusting the transmission power of the communication signal to achieve a change in the communication signal strength by changing the transmission power.

[0015] In some embodiments, obtaining communication status data of a target network, and determining whether crosstalk exists between the target network and other networks according to the communication status data, includes:

[0016] Determine a target network device to be communicated in the target network, and determine a communication line status between the target network device and the target network device;

[0017] If it is determined according to the communication line status that the communication line with the target network device is occupied, it is determined that crosstalk exists between the target network and other networks.

[0018] In some embodiments, determining a communication line status with a target network device includes:

[0019] Send test data to the target network device and receive the confirmation data frame returned after the test data is sent;

[0020] The confirmation data frame is identified, and a line state identifier for characterizing the state of the communication line is obtained according to the confirmation data frame.

[0021] In some embodiments, the method further comprises:

[0022] If network parameters corresponding to other networks are received and network identifiers of other networks are identified in the network parameters, it is determined that crosstalk exists between the target network and the other networks. The network parameters are parameters periodically broadcast by each network.

[0023] In some embodiments, the method further comprises:

[0024] If crosstalk always exists between the target network and other networks, the frequency of data transmission in the target network is reduced.

[0025] In some embodiments, before adjusting the communication signal strength of the target network, the method further includes:

[0026] Determine the priority of target data to be transmitted;

[0027] If the priority is greater than the priority threshold, the data transmission frequency of other networks is reduced so that the target data is transmitted first.

[0028] In a second aspect, the present disclosure provides a communication system, the communication system comprising:

[0029] A number of network devices, each of which is connected to the photovoltaic module and is used to convert the electrical signal generated by the photovoltaic device to obtain the converted electrical signal;

[0030] A network control device is connected to each network device and is used to collect converted electrical signals sent by each network device and collect device data of each network device;

[0031] The power distribution equipment is connected to the network control equipment and is used to connect the network control equipment to the power grid; wherein:

[0032] The communication system suppresses the crosstalk between the target network and other networks in the communication system according to the communication crosstalk suppression method proposed in the first aspect.

[0033] In some of the embodiments, the communication system further includes a wave blocking device, which is disposed between the network control device and the power distribution device and is used to isolate the communication signals of the target network from the communication signals of other networks.

[0034] The communication crosstalk suppression method first obtains the communication status data of the target network, and determines whether there is crosstalk between the target network and other networks based on the communication status data. In the case of crosstalk between the target network and other networks, the communication signal of the target network is adjusted according to the first signal adjustment method, and the communication quality parameter after the signal adjustment is synchronously obtained. If the communication quality parameter after the communication signal adjustment does not meet the preset communication condition, the communication signal is adjusted according to the second signal adjustment method. Among them, the first signal adjustment method and the second signal adjustment method are different adjustment methods.

[0035] When there is crosstalk in the communication system, the communication crosstalk suppression scheme disclosed in the present invention first adjusts the communication signal through the first signal adjustment method, so as to reduce the communication crosstalk between other networks by changing the communication signal of the target network. At the same time, the crosstalk suppression method disclosed in the present invention also monitors the communication quality parameters in real time during signal adjustment. If the communication quality parameters after the communication signal is adjusted do not meet the preset communication quality conditions, the communication signal is adjusted by a second signal adjustment method different from the first signal adjustment method. The communication crosstalk suppression method disclosed in the present invention can flexibly determine the signal adjustment method according to the communication quality parameters and the preset communication quality conditions. When the communication quality parameters adjusted by the first signal adjustment method do not meet the conditions, the second signal adjustment method can be selected to adjust the communication signal. The present invention can use a variety of suppression methods when controlling crosstalk suppression, and the adjustment method is determined according to the communication quality parameters during adjustment, which has good flexibility. Thereby reducing the impact of crosstalk between the target network and other networks in the communication system on data transmission, improving the quality of the communication signal during communication transmission, ensuring the reliable transmission of data, and improving the transmission rate of the communication signal. In addition, the crosstalk suppression method disclosed in the present invention also takes into account the monitoring of communication quality parameters to improve the reliability of data transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] FIG1 is a schematic diagram of the structure of a communication system according to an embodiment;

[0038] FIG2 is a schematic flow chart of a communication crosstalk suppression method according to an embodiment;

[0039] FIG3 is a schematic flow chart of a communication crosstalk suppression method according to another embodiment;

[0040] FIG4 is a schematic diagram of the structure of a communication system according to another embodiment;

[0041] FIG. 5 is a schematic diagram of communication crosstalk generation according to another embodiment. DETAILED DESCRIPTION

[0042] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0044] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, 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 can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0046] It can be understood that “at least one” means one or more, “plurality” means two or more, and “at least a portion of an element” means a part or all of an element.

[0047] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0048] The photovoltaic system mainly includes photovoltaic modules, power converters, data collectors and loads. When working, photovoltaic modules convert solar radiation energy into electrical energy, and power converters can convert the direct current generated by photovoltaic modules into alternating current, which is used to power the load. The data collector is connected to both the power converter and the load to collect and transmit data on devices such as power converters, which facilitates monitoring and real-time analysis. The data collected by the data collector can be operating parameters such as voltage, current, and power of the power converter.

[0049] Power converters are power conversion devices used to convert electrical energy from one form to another to achieve energy transmission and control under different power requirements. Power converters can be micro inverters (abbreviated as STA, Station), energy storage converters, etc. Exemplarily, micro inverters can convert DC direct current into AC alternating current. The DC end (input) of the micro inverter is connected to a DC source (photovoltaic module), and the AC end (output) of the power converter can be connected to an AC grid and an AC device.

[0050] In photovoltaic systems, data acquisition devices and power converters can be connected via Power Line Communication (PLC) technology to transmit data. PLC technology uses the existing power line infrastructure to superimpose communication data with power signals to achieve communication data transmission.

[0051] Take the communication system shown in Figure 1 as an example. This system communicates based on PLC technology, and the communication equipment is also an electrical device. Taking Figure 1 as an example, there are multiple photovoltaic systems under the same distribution equipment, each photovoltaic system corresponds to a network, and the power data and communication data between different networks are collected to the distribution equipment. The distribution equipment has a signal isolation function to prevent mutual interference between circuits.

[0052] The network devices of each network are controlled and managed by the network control device of the network. The same network includes a network control device and several network devices. The network control device is connected to each network device. The network control device monitors the network device data by collecting data from each network device.

[0053] As shown in Figure 1, the power distribution equipment includes two networks, network A and network B. Network A includes network control device A and network devices A1, network device A2, ..., network device An, a total of n network devices. Network control device A is connected to each network device through a switch A such as a relay to achieve control and collection of each network device. It can be understood that the network devices in network A are all photovoltaic modules, which are used to convert solar energy into electrical energy to power load A.

[0054] It should be noted that the load device can also be directly connected to the power distribution device to be powered directly through the power grid. Taking network B in Figure 1 as an example, load B can be connected to each network device in network B (such as network device B1, network device B2, ..., network device Bm) through network control device B, or it can be directly connected to the power distribution device. Load B can be powered by the power generated by the photovoltaic module as a network device, or it can be powered directly through the power distribution device.

[0055] Furthermore, in the communication system shown in FIG1 , a network may correspond to a small-scale building such as a family, a company, a warehouse, a restaurant, etc. Generally speaking, different networks under the same power distribution equipment may be different types of buildings within a preset distance range, for example, network A is a family network, and network B is a store network within a preset distance range.

[0056] Specifically, the network device in Figure 1 can be a power converter in a photovoltaic system, the network control device can be a data collector in a photovoltaic system, and the power distribution device can be a transformer in a power distribution network in a photovoltaic system. Because the data communication of the photovoltaic system is based on the transmission of the mains line, the communication data between different network control devices may circulate with each other, resulting in communication crosstalk. PLC communication is a multi-channel monitoring access with conflict detection. As long as there is data transmission at any node on the communication bus, other nodes cannot transmit data at the same time. In other words, the generation of communication crosstalk will lead to a decrease in the communication quality of the communication system and affect the transmission efficiency of the communication data. Traditional crosstalk suppression methods will also affect the quality of the communication signal in the communication system when suppressing crosstalk, reducing the reliability of data transmission.

[0057] In some exemplary embodiments, as shown in FIG2 , a communication crosstalk suppression method is proposed, which can be used to suppress crosstalk when crosstalk is generated in data transmission of a photovoltaic system, and the method includes the following steps 202 to 206. Among them:

[0058] Step 202: Acquire communication status data of the target network, and determine whether there is crosstalk between the target network and other networks based on the communication status data.

[0059] In combination with the above, a power distribution device can correspond to multiple photovoltaic systems, and each photovoltaic system corresponds to a communication network. Each network includes a network control device and a plurality of network devices. In each network, the network control device is connected to each network device respectively to transmit and interact with data. The network control device can be a data collector (COO, Concentrator) in the photovoltaic system of the present disclosure, the network device can be a power converter in the photovoltaic system, and the power distribution device can be a transformer connected to the mains.

[0060] Since the distance between networks connected to the same power distribution equipment is short, crosstalk is easy to occur when transmitting data. In order to ensure the data transmission quality and transmission efficiency of the target network, communication crosstalk needs to be suppressed. Before crosstalk suppression, crosstalk identification is required to determine whether there is crosstalk between the current target network and other networks.

[0061] The target network represents the network that needs to carry out data transmission. Other networks represent the networks connected to the same power distribution device as the target network. Communication status data is data that represents the communication connection status in the network, such as a status identifier used to represent the connection status between a network control device and a network device, or an identifier that represents the result of data transmission between a network control device and a network device. For example, if the connection status identifier indicates that the device is not connected, one possibility is that the device is not physically connected to the data transmission link. Another possibility is that the data transmission link between the network control device and the network device is not connected due to crosstalk between the target network and the other networks; if the data transmission identifier indicates that the data transmission has failed, it may be due to crosstalk between the target network and the other networks, resulting in the failure of data transmission between the network control device and the network device.

[0062] Exemplarily, the communication status data can be determined when a communication link is established between devices in the target network. For example, when a data collector needs to collect data from a power converter, it needs to first establish a communication link with the power converter. Based on the establishment of the communication link, the communication connection status between the data collector and the power converter can be determined, and then it can be determined whether there is crosstalk in the current target network.

[0063] Step 204: in the presence of crosstalk, adjust the communication signal of the target network according to the first signal adjustment method, and obtain the communication quality parameter of the adjusted communication signal.

[0064] Communication quality parameters are parameters that characterize the quality of communication links in communication systems, such as link quality parameters represented by link quality indicators (LQI for short), or transmission quality parameters represented by packet loss rates. LQI is a common indicator used to measure the quality of communication links. LQI is usually calculated based on factors such as received signal strength, noise interference, or packet loss rate, and the stability and reliability of the link are determined based on the quality of the received signal. When the quality of the communication link is good, the LQI value is high, corresponding to a strong communication signal, less signal interference, and stable data transmission; when the quality of the communication link is poor, the LQI value is low, corresponding to a weak communication signal, large signal interference, and unstable data transmission.

[0065] The first signal adjustment method is to adjust the communication signal to suppress the communication crosstalk between the target network and other networks by adjusting the communication signal of the target network. Exemplarily, the first signal adjustment method can be to adjust the strength, amplitude, phase, gain, bandwidth, modulation mode, etc. of the communication signal.

[0066] The modulation mode characterizes the way in which parameters such as signal amplitude and phase are modulated during data transmission. The modulation mode of communication signals is different in different communication scenarios. Please refer to Table 1, the modulation mode corresponds to the signal-to-noise ratio (SNR). Generally speaking, the more complex the modulation mode of the signal, the higher the transmission rate supported by the channel, and the higher the required SNR.

[0067] Table 1

[0068] Modulation Mode ROBO DBPSK DQPSK D8PSK Required signal-to-noise ratio ≥0.4dB ≥3.7dB ≥6.7dB ≥9.6dB

[0069] The signal-to-noise ratio (SNR) is related to the link quality parameter. Take LQI as an example of a link quality parameter. LQI is related to the received signal strength and signal quality. The higher the LQI, the better the signal quality transmitted by the communication link. SNR represents the relationship between signal strength and noise strength. The higher the SNR, the better the signal strength and the better the communication quality. It can be understood that SNR is proportional to LQI, that is, the higher the SNR, the higher the corresponding LQI. For example, the conversion between SNR and LQI can be performed using the empirical formula SNR=LQI / 4-10.

[0070] Different networks have different LQIs required for parsing communication data. A network with a high LQI cannot parse out the communication data of a network with a low LQI during communication data parsing. This embodiment achieves communication crosstalk suppression by adjusting the modulation mode to change the LQI for communication data parsing. Exemplarily, if the current signal modulation mode in the target network is DBPSK, the signal-to-noise ratio needs to be no less than 3.7dB during data transmission. If there is crosstalk between the target network and other networks, the modulation mode of the communication signal is adjusted to DQPSK. With the change of the modulation mode, the signal-to-noise ratio required for data transmission becomes no less than 6.7dB, and the LQI required for parsing the data transmission link also increases accordingly. As the LQI required for the target network to parse data increases, the low LQI communication data transmitted from other networks will not be parsed, and the crosstalk between the corresponding target network's communication signal and other networks will also decrease accordingly.

[0071] This embodiment adjusts the communication signal of the target network according to the first signal adjustment method, and obtains the communication quality parameters of the adjusted communication signal in real time. Exemplarily, the communication quality parameters can be determined by calculating the LQI value, packet loss rate, noise interference and other parameters during data transmission between the data collector and the power converter. For example, when the network control device and the network device are transmitting data, the packet loss rate within a period of time is calculated, and the calculated packet loss rate is used as the communication quality parameter; the LQI value can also be directly obtained from the network control device, and the LQI value is used as the communication quality parameter.

[0072] Step 206: If the communication quality parameter does not meet the preset communication quality condition, the communication signal is adjusted according to a second signal adjustment method; the first signal adjustment method and the second signal adjustment method are different.

[0073] The preset communication quality condition indicates the minimum standard for normal communication between devices in the target network. Meeting the preset communication quality condition indicates that the communication system meets the basic communication quality standard. When the communication quality parameter of the target network after the communication signal does not meet the preset communication quality condition, it indicates that the devices in the target network cannot transmit data normally, and the current adjustment method of the communication signal needs to be stopped.

[0074] The second signal adjustment method may also be to adjust the strength, amplitude, phase, gain, bandwidth, modulation mode, etc. of the communication signal. However, the second signal adjustment method is different from the first signal adjustment method. For example, when the first signal adjustment method is to adjust the strength of the communication signal, the second signal adjustment method may be to adjust the modulation mode of the communication signal.

[0075] The adjustment of the communication signal will affect the data transmission in the communication system, but different signal adjustment methods have different degrees of influence on the communication quality parameters. When it is monitored during the communication signal adjustment process that the communication quality parameters do not meet the preset communication quality conditions. This embodiment can replace the second signal adjustment method that is different from the first signal adjustment method to adjust the communication signal of the target network. This embodiment can flexibly adopt a variety of suppression methods based on the communication quality parameters to perform crosstalk suppression control. When the communication quality parameters after adjustment by the first signal adjustment method do not meet the conditions, the second signal adjustment method is adjusted to continue to adjust the communication signal. The reliability of data transmission in the target network is ensured through flexible crosstalk suppression methods.

[0076] Exemplarily, the first signal adjustment method is to adjust the strength of the communication signal. When the communication signal strength is adjusted to not meet the preset communication quality conditions, if there is still a crosstalk between the target network and the other networks, continuing to reduce the communication signal strength through the first signal adjustment method will affect data transmission. Then change the signal adjustment method, and then continue to adjust the communication signal by adjusting the modulation method of the communication signal. After updating the modulation method, the signal-to-noise ratio required for data transmission is improved, and the LQI required for parsing the data transmission link is also increased accordingly. Since the LQI corresponding to the received communication data of other networks is low, when the modulation mode of the target network changes and the LQI required by the target network is increased, the crosstalk data with low LQI in other networks cannot be parsed, thereby suppressing the crosstalk between the target network and other networks, so that the communication signal can have better anti-noise and anti-interference capabilities, and improve the reliability of data transmission of the target network.

[0077] When there is crosstalk in the communication system, the communication crosstalk suppression scheme disclosed in the present invention first adjusts the communication signal of the target network through the first signal adjustment method, for example, the strength, amplitude, phase, gain, bandwidth, modulation mode, etc. of the communication signal are adjusted to change the communication signal of the target network. As the communication signal of the target network changes, the signal crosstalk between the target network and other networks under the same power distribution equipment can be reduced to achieve communication crosstalk suppression. In addition, while adjusting the communication signal of the target network, the present embodiment also obtains the communication quality parameters of the target network in real time. When the communication quality parameters of the communication signal after adjustment do not meet the preset communication quality conditions, the second signal adjustment method is switched to adjust the communication signal. The second signal adjustment method can also be to adjust the strength, amplitude, phase, gain, bandwidth, modulation mode, etc. of the communication signal. However, the second signal adjustment method is different from the first signal adjustment method. The signal adjustment method can be flexibly selected according to the communication quality parameters and the preset communication quality conditions. When the communication quality parameters adjusted by the first signal adjustment method do not meet the conditions, the second signal adjustment method can be selected to adjust the communication signal. Thus, the influence of crosstalk between the target network and other networks on data transmission can be reduced, and the data transmission quality of the target network can be guaranteed while ensuring reliable data transmission, thereby improving the efficiency of data transmission. In the crosstalk suppression control of this embodiment, a variety of suppression methods can be used, and the adjustment method can be freely determined according to the communication quality parameters during adjustment, which has good flexibility.

[0078] In some further embodiments, after adjusting the communication signal of the target network according to the first signal adjustment method and obtaining the communication quality parameters of the adjusted communication signal, the method also includes: determining whether crosstalk still exists between the adjusted target network and other networks; if crosstalk still exists and the communication quality parameters meet the preset communication quality conditions, repeatedly adjusting the communication signal of the target network according to the first signal adjustment method.

[0079] Exemplarily, the adjustment strategy for the communication signal of the target network can be implemented multiple times. Taking the adjustment of the strength of the communication signal as an example, the signal strength can be adjusted multiple times, such as reducing it by 1dB each time, and the communication quality parameters are obtained and it is determined whether there is still crosstalk between the target network and other networks after no adjustment. If there is still crosstalk between the target network and other networks after the signal adjustment, and the communication quality parameters meet the preset communication quality conditions, the communication signal can be adjusted again in the same way, that is, the communication signal is still adjusted by the first signal adjustment method until the adjusted communication quality parameters do not meet the preset communication quality conditions. At this time, even if there is still crosstalk between the target network and other networks, the first signal adjustment method cannot be used to adjust the signal, and crosstalk suppression needs to be performed in other ways.

[0080] This embodiment can repeatedly use the first signal adjustment method to adjust the communication signal, and determine whether it needs to be adjusted again through the current signal adjustment method by judging whether there is crosstalk after the adjustment. If the crosstalk between the networks still exists, and the current communication quality also meets the preset communication quality conditions, the crosstalk suppression can be repeatedly performed according to the current first signal adjustment method to improve the reliability of crosstalk suppression. In other words, before adjusting the signal adjustment method, the crosstalk suppression method of this embodiment can repeatedly use the same signal adjustment method to adjust the communication signal multiple times, so that after adjusting the communication signal through a certain signal adjustment method, the communication crosstalk between the target network and other networks can be reduced as much as possible. Not only can the communication quality parameters be guaranteed, but the adjustment method is also flexible and diverse.

[0081] In some other implementations, when the signal adjustment continues according to the second signal adjustment method, the communication signal can also be repeatedly adjusted by the second signal adjustment method when crosstalk exists and the communication quality parameter meets the preset communication quality condition. Furthermore, when the communication signal is adjusted according to the second signal adjustment method to the point where the communication quality parameter does not meet the preset communication quality condition, the communication signal can be switched to the third signal adjustment method, and so on. It can be understood that the third signal adjustment method is different from the second signal adjustment method and the first signal adjustment method. This embodiment can flexibly determine the adjustment method of the communication signal according to the communication quality parameters and the preset communication quality conditions, reduce the impact of crosstalk between the target network and other networks on data transmission, ensure reliable data transmission while also ensuring the data transmission quality of the target network, improve the efficiency of data transmission, and has high flexibility and strong reliability.

[0082] In some specific embodiments, when the first signal adjustment method is used to adjust the signal strength, the communication signal of the target network is adjusted according to the first adjustment method, including: adjusting the transmission power of the communication signal to achieve a change in the communication signal strength by changing the transmission power; or, when the second signal adjustment method is used to adjust the signal strength, the communication signal of the target network is adjusted according to the second adjustment method, including: adjusting the transmission power of the communication signal to achieve a change in the communication signal strength by changing the transmission power.

[0083] Signal strength is data that characterizes the quality of a signal in a communication system. Signal strength can be directly represented by the power of a communication signal, or indirectly represented by parameters such as signal quality, bit error rate, and signal coverage range. This embodiment has no restrictions on the adjustment methods corresponding to the first signal adjustment method and the second signal adjustment method, and only requires that the first signal adjustment method be different from the second adjustment method. When there is a method for adjusting the strength of the communication signal in the first signal adjustment method or the second signal adjustment method, the communication signal strength can be adjusted by adjusting the transmission power of the communication signal in the target network. Generally speaking, when suppressing communication crosstalk, the transmission power of the communication signal needs to be reduced to reduce the strength of the communication signal.

[0084] Exemplarily, when the transmission power of the communication signal needs to be adjusted, the network control device controls itself and the network devices connected to it to reduce the signal transmission power to reduce the communication signal strength. It can be understood that as the communication signal strength decreases, the distance at which data can be transmitted between devices becomes closer. The signal transmission power can be adjusted sequentially according to the set value, for example, reducing the transmission power by 2dB each time, and so on.

[0085] This embodiment controls itself and the network devices connected to it through a network control device, changes the transmission power of the communication signal, and then reduces the signal strength of the communication signal. Therefore, the influence of the crosstalk between the target network and other networks on the data transmission can be reduced by changing the communication signal strength, and the communication quality during data transmission can be improved. Since the reduction of the communication signal strength will affect the transmission distance of the communication signal, when adjusting the transmission power, this embodiment can adjust it in a small amount and multiple times to balance the communication quality of the communication signal and the crosstalk threshold, and achieve crosstalk suppression with as little adjustment of the communication signal strength as possible, thereby ensuring the transmission quality of the communication signal.

[0086] In some other implementations, the communication signal strength can also be achieved by setting up signal adjustment devices such as attenuators and wave traps in the target network. The present disclosure has no restrictions on the adjustment method of the communication signal strength, and in actual application, the adjustment method of the communication signal strength can be flexibly determined according to specific needs.

[0087] In other embodiments, the communication status data of the target network is obtained in step 202, and whether there is crosstalk between the target network and other networks is determined based on the communication status data, including: determining the target network device to be communicated in the target network, and determining the status of the communication line between the target network device and the target network device; if the communication line between the target network device and the target network device is occupied according to the communication line status, then it is determined that there is crosstalk between the target network and other networks.

[0088] The target network mainly involves data transmission between network control devices and network devices, that is, data transmission between data collectors and power converters. The target network device represents the device in the target network that the network control device needs to transmit data to. When the network control device needs to transmit data to a certain network device, the network device is set as the target network device, and a communication link is established between the network control device and the target network device.

[0089] The communication line status refers to the link connection status between the network control device and the target network device. By determining the communication line status between the network control device and the target network device, it can be determined whether data can be transmitted between the network control device and the target network device, and then whether there is crosstalk between the target network and other networks. If the communication line between the network control device and the target network device is occupied according to the communication line status, data cannot be transmitted between the network control device and the target network device, and it is considered that there is crosstalk between the target network and other networks. This embodiment recognizes communication crosstalk by analyzing the communication status data. The network control device can directly identify crosstalk in the received communication status data without the need for additional judgment steps, and the operation is simple and easy to implement.

[0090] In some specific embodiments, determining the state of a communication line with a target network device includes: sending test data to the target network device and receiving a confirmation data frame returned after the test data is sent; identifying the confirmation data frame, and obtaining a line state identifier for characterizing the state of the communication line based on the confirmation data frame.

[0091] When building a target network, the network control device must first be networked with each network device. When the networking is completed, when the network control device needs to transmit data with the target network device in the target network, a communication link is established with the target network device, and data is transmitted based on the communication link.

[0092] Test data is data sent by the network control device when establishing a communication link with the target network device. Test data can be data that needs to be transmitted or any data used for testing. Confirmation data frame is a data frame received from the target network device after the network control device sends the test data. Confirmation data frame includes information representing the connection status or communication status between the target network device and the network control device. By identifying the confirmation data frame, a line status identifier representing the status of the communication line can be obtained. The line status identifier is used to determine whether the communication line is normal, the communication node is not found, or the communication line is occupied.

[0093] Exemplarily, when constructing a target network, the network control device and the network device are first networked to obtain the network structure of the target network. When the network control device needs to transmit data, the target network device that needs to perform data communication is first determined. After the target network device is determined, the network control device sends test data to the target network device, and receives a confirmation data frame fed back from the target network device after the test data is sent. By analyzing and identifying the confirmation data frame, a line status identifier representing the state of the communication line is obtained. The line status identifier may indicate the reason for the failure to send the test data. For example, the target network device cannot be found, or the communication line is occupied. In the case where the target network device cannot be found, there may be an anomaly when networking, that is, the target network device is not included in the network structure. In the case where the communication line is occupied, there may be crosstalk between the target network and other networks.

[0094] Furthermore, in the above embodiment, if the test data fails to be sent, the test data can be sent repeatedly to verify the communication line status between the network control device and the target network device. If the communication line is occupied after repeated multiple times, it can be basically determined that there is crosstalk between the target network and other networks.

[0095] In some other embodiments, the method further includes: if network parameters corresponding to other networks are received and network identifiers of other networks are identified in the network parameters, it is determined that crosstalk exists between the target network and other networks, and the network parameters are parameters periodically broadcast by each network.

[0096] As mentioned above, there are multiple networks under the same power distribution equipment, and each network corresponds to a network identifier, which can be called PANID (Personal Area Network Identifier). In the communication system disclosed in the present invention, each network will periodically broadcast network parameters to update network data through broadcasting to ensure that all devices in the network are in normal working condition. The network parameters broadcast periodically by each network include the network identifier of the network itself.

[0097] Therefore, if a network obtains the network identification of other networks on its communication line, it means that the communication line of the network is occupied and there is communication crosstalk. That is, by analyzing and processing the network broadcast data, it can be determined whether there is communication crosstalk between the target network and other networks.

[0098] For example, if the target network receives its own network identifier sent by other networks through periodic broadcast, it means that the target network's communication line can receive network parameters broadcast by other networks, that is, the target network's communication line is occupied by other networks, and there is communication crosstalk between the target network and other networks.

[0099] In some other embodiments, the method further includes: if there is always crosstalk between the target network and other networks, reducing the frequency of data transmission in the target network.

[0100] The data transmission frequency can be determined by the data transmission cycle. The longer the data transmission cycle, the lower the data transmission frequency, and the shorter the data transmission cycle, the higher the data transmission frequency.

[0101] The communication crosstalk between the target network and other networks can be expressed as the communication line of the target network being occupied. That is, when the device in the target network needs to perform data transmission, the communication line in the target network is transmitting data from other networks. Therefore, when there is always uncontrollable crosstalk between the target network and other networks, the transmission cycle of the data in the target network can be increased through the network control device to reduce the data transmission frequency. If the communication line is occupied during data transmission at the first moment, data transmission can be performed again at the second moment, as long as the data can be successfully transmitted within the transmission cycle.

[0102] In this embodiment, when crosstalk always exists between the target network and other networks, the data transmission frequency in the target network is reduced, and the effectiveness of data transmission is sacrificed to ensure successful data transmission in the target network.

[0103] In other embodiments, before adjusting the communication signal strength of the target network, the method also includes: determining the priority of the target data to be transmitted; if the priority is greater than a priority threshold, reducing the data transmission frequency of other networks to allow the target data to be transmitted first.

[0104] The target data is used to characterize the data transmitted between network devices, and the priority is used to characterize the importance of the target data. For example, when the equipment in the target network needs to be upgraded, protected, or scheduled, the priority of the upgraded data to be transmitted, the protection signal in the event of a system failure, or the scheduling control signal is higher than the priority of the equipment monitoring data transmitted in a conventional manner, and needs to be transmitted first. Among them, the priority of the target data can be determined by the priority identifier when the communication link is established or when the communication interaction occurs.

[0105] Exemplarily, if the priority of the target data is greater than the priority threshold, the data transmission frequency of other networks is reduced, that is, the data transmission period of other networks is increased, so that the target data of the target network can be transmitted preferentially.

[0106] In this embodiment, when the target network needs to transmit target data, if crosstalk is detected between the target network and other networks, the data transmission period of other networks is adjusted to reduce the data transmission frequency of other networks, and important and high-priority data is transmitted first, thereby ensuring the stability of operation of each device in the system.

[0107] In some detailed embodiments, as shown in FIG3 , a communication crosstalk suppression method is provided, the method comprising the following steps 302 to 310. Among them:

[0108] Step 302: Determine whether there is crosstalk between the target network and other networks.

[0109] The communication crosstalk can be determined by judging the communication status data of the target network.

[0110] The communication status data may be the communication line status that characterizes the connection status between network devices. Taking the communication between the network control device and the network device as an example, after the network control device completes the formation with each network device, it sends test data to the target network device. After the test data is sent, the network control device receives the confirmation data frame returned after the test data is transmitted, and obtains the line status identifier representing the communication line status by identifying the confirmation data frame. If the line status identifier indicates that the current communication line is occupied, it means that there is crosstalk between the target network and other networks at the current moment.

[0111] In some other implementations, since each network periodically broadcasts its own network parameters on the communication bus, it is also possible to obtain the broadcasted network parameters of other networks on the communication bus, and identify whether the obtained network parameters include the network identifier of other networks to determine whether there is crosstalk between the target network and other networks.

[0112] Step 304 , determining the priority of the target data, and giving priority to transmitting the target data whose priority is greater than the priority threshold.

[0113] The target data refers to the data transmitted between network devices, and the priority refers to the importance of the target data. The priority of the target data can be obtained through the priority identifier when the communication link is established for data transmission.

[0114] If the priority of the target data is greater than the priority threshold, the data transmission frequency of other networks is reduced, that is, the data transmission period of other networks is increased, so that the target data of the target network can be transmitted preferentially.

[0115] Step 306: When crosstalk exists between the target network and other networks, crosstalk suppression is achieved by adjusting the communication signal strength of the target network according to the first signal adjustment method.

[0116] At this time, the first signal adjustment method is used to adjust the communication signal strength. The communication signal strength is adjusted by adjusting the transmission signal power in the target network. As the communication signal strength of the target network decreases, the communication crosstalk between the target network and other networks can be suppressed. When adjusting the communication signal strength, the communication quality parameter of the target network after the communication signal is adjusted is obtained, and it is determined whether the communication quality parameter meets the preset communication quality condition. If the adjusted communication quality parameter does not meet the preset communication quality condition, the communication signal strength continues to be reduced and the communication quality parameter is updated until the updated communication quality parameter meets the preset communication condition.

[0117] Exemplarily, when the transmission signal power needs to be adjusted, the network control device controls itself and the connected network devices to reduce the signal transmission power to reduce the communication signal strength. It can be understood that as the communication signal strength decreases, the distance at which data can be transmitted between devices becomes closer. When reducing the signal transmission power, it can be adjusted sequentially according to the set value, for example, reducing the transmission power by 2dB each time, and so on.

[0118] After adjusting the signal strength of the communication signal, the network control device counts the communication quality parameters such as the packet loss rate or LQI of itself and the connected network devices, and compares the acquired communication quality parameters with the preset communication quality conditions. The preset communication quality conditions include a packet loss rate of no more than 0.5%, or an LQI value greater than 70. When the communication quality parameters are not satisfied with the preset communication quality conditions, it means that the current target network no longer meets the minimum communication standard, and the adjustment of the communication signal strength is stopped.

[0119] After each adjustment of the communication signal strength, the crosstalk between the target network and other networks can be detected. If communication crosstalk still exists after the communication signal strength is reduced, and the communication quality parameters also meet the preset communication quality conditions, the communication signal is repeatedly adjusted according to the first signal adjustment method to adjust the signal strength.

[0120] Step 308: When crosstalk still exists between the target network and other networks and the communication quality parameter does not meet the preset communication condition, crosstalk suppression is achieved by adjusting the modulation mode of the signal in the target network according to the second signal adjustment method.

[0121] As shown in Table 1, different modulation modes correspond to different signal-to-noise ratios SNR. The signal-to-noise ratio SNR is related to the link quality parameter LQI. When the communication signal strength is adjusted to the communication quality parameter that does not meet the preset communication quality conditions, but there is still crosstalk between the target network and other networks, the second signal adjustment mode can be used to adjust the modulation mode of the signal and improve the modulation mode. The higher the LQI requirement for parsing the data, the lower the LQI corresponding to the communication data from other networks that come through the crosstalk. As the LQI required for the target network to parse the data increases, the low LQI data from the crosstalk cannot be parsed, thereby achieving communication crosstalk suppression.

[0122] In the adjustment according to the second signal adjustment mode, if after the modulation mode of the signal in the target network is adjusted, there is still crosstalk between the target network and other networks, the modulation mode is repeatedly adjusted, and the current link quality parameter LQI is determined after each adjustment of the modulation mode until the adjusted link quality parameter LQI does not meet the standard link quality parameter in the preset communication quality condition.

[0123] Step 310: When crosstalk still exists between the target network and other networks, crosstalk suppression is achieved by adjusting the frequency of data transmission in the target network.

[0124] When crosstalk always exists between the target network and other networks, the data transmission period in the target network is increased to reduce the data transmission frequency, thereby ensuring successful data transmission of the target network by sacrificing the effectiveness of data transmission.

[0125] This embodiment is applied in the communication of the photovoltaic system. When a device in the target network needs to transmit data but there is communication crosstalk between the target network and other networks, the signal adjustment method can be flexibly selected according to the communication quality parameters and the preset communication quality conditions, such as reducing the communication signal strength, adjusting the signal modulation mode, and adjusting the signal transmission frequency. The communication crosstalk is suppressed by adjusting the communication signal, thereby reducing the impact of the crosstalk between the target network and other networks on the data transmission. When the communication system of this embodiment is transmitting data, the crosstalk in the target network is suppressed by the above-mentioned crosstalk suppression method to ensure the successful transmission of data, and the data transmission quality in the target network can also be improved, thereby improving the data transmission efficiency in the target network.

[0126] It can be understood that the present disclosure provides a variety of ways to suppress communication crosstalk. In practical applications, any one or more ways can be selected to suppress crosstalk, and the present disclosure has no restrictions on the order and number of the communication crosstalk suppression measures.

[0127] In some embodiments, a communication system is proposed, which suppresses the crosstalk existing in the communication system through the communication crosstalk suppression method proposed in the above embodiment. The structure of the communication system is shown in Figure 1, including a number of network devices, a network control device and a power distribution device. Each network device is connected to a photovoltaic component, and is used to convert the electrical signal generated by the photovoltaic device to obtain a converted electrical signal. The network control device is connected to each network device, and is used to collect the converted electrical signals sent by each network device, and collect the device data of each network device. The power distribution device is connected to the network control device, and is used to connect the network control device to the power grid.

[0128] Furthermore, a switch may be provided between the network control device and the network device, and each network device may be connected to the network control device through the setting of the switch. Exemplarily, the switch may be an air switch or a relay.

[0129] In some other embodiments, as shown in FIG. 4 , the communication system further includes a wave blocking device, which is disposed between the network control device and the power distribution device, and is used to isolate and block signals in the circuit, thereby isolating the communication signals of the target network from the communication signals of other networks.

[0130] As shown in Figure 5, the distance between network A and network B is too close, which causes interference in communication data between network A and network B, resulting in communication crosstalk. In some other embodiments, when the photovoltaic system is deployed, the line distance between different photovoltaic systems can be increased to reduce coupling interference between lines and suppress communication crosstalk.

[0131] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0132] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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 specification.

[0133] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A communication crosstalk suppression method, characterized in that: The method comprises: Acquire communication status data of the target network, and determine whether there is crosstalk between the target network and other networks according to the communication status data; In the presence of crosstalk, adjusting the communication signal of the target network according to a first signal adjustment method, and obtaining a communication quality parameter of the communication signal after the adjustment; If the communication quality parameter does not meet the preset communication quality condition, the communication signal is adjusted according to a second signal adjustment method; the first signal adjustment method and the second signal adjustment method are different.

2. The method according to claim 1, characterized in that After adjusting the communication signal of the target network according to the first signal adjustment mode and obtaining the communication quality parameter of the communication signal after the adjustment, the method further includes: Determine whether crosstalk still exists between the adjusted target network and the other networks; If crosstalk still exists and the communication quality parameter meets the preset communication quality condition, the communication signal of the target network is repeatedly adjusted according to the first signal adjustment method.

3. The method according to claim 1, characterized in that When the first signal adjustment method is used to adjust the signal strength, adjusting the communication signal of the target network according to the first signal adjustment method includes: adjusting the transmission power of the communication signal to achieve a change in the communication signal strength by changing the transmission power; or, When the second signal adjustment method is used to adjust the signal strength, adjusting the communication signal of the target network according to the second signal adjustment method includes: adjusting the transmission power of the communication signal to achieve a change in the communication signal strength by changing the transmission power.

4. The method according to claim 1, characterized in that: The acquiring the communication status data of the target network, and judging whether there is crosstalk between the target network and other networks according to the communication status data, includes: Determine a target network device to be communicated with in the target network, and determine a communication line status between the target network device and the target network device; If it is obtained according to the communication line status that the communication line with the target network device is occupied, it is determined that crosstalk exists between the target network and the other networks.

5. The method according to claim 4, characterized in that The determining of the communication line status with the target network device comprises: Sending test data to the target network device, and receiving a confirmation data frame returned after the test data is sent; The confirmation data frame is identified, and a line status identifier for characterizing the communication line status is obtained according to the confirmation data frame.

6. The method according to claim 1, characterized in that The method further comprises: If network parameters corresponding to other networks are received and network identifiers of other networks are identified in the network parameters, it is determined that crosstalk exists between the target network and the other networks, and the network parameters are parameters periodically broadcast by each network.

7. The method according to any one of claims 1 to 6, characterized in that: The method further comprises: If crosstalk always exists between the target network and the other networks, the frequency of data transmission in the target network is reduced.

8. The method according to claim 1, characterized in that Before adjusting the communication signal of the target network according to the target signal adjustment mode, the method further includes: Determine the priority of target data to be transmitted; If the priority is greater than the priority threshold, the data transmission frequency of the other networks is reduced so that the target data is transmitted first.

9. A communication system, characterized in that: The communication system comprises: A plurality of network devices, each of which is connected to the photovoltaic module and is used to convert the electrical signal generated by the photovoltaic device to obtain the converted electrical signal; A network control device, connected to each of the network devices, for collecting the converted electrical signals sent by each of the network devices and collecting device data of each of the network devices; A power distribution device connected to the network control device and used to connect the network control device to a power grid; wherein: The communication system suppresses crosstalk between a target network and other networks in the communication system according to the communication crosstalk suppression method according to any one of claims 1 to 8.

10. The communication system according to claim 9, characterized in that: The communication system further includes a wave blocking device, which is disposed between the network control device and the power distribution device and is used to isolate the communication signal of the target network from the communication signals of other networks.

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