Two-stage converter anomaly detection method and system

Abstract

The application discloses a two-stage converter abnormality detection method, which is used for monitoring electrical parameters and working states of a two-stage converter so as to identify and handle abnormal conditions in time. The method comprises the following steps: determining whether to enable an inverter loop by a first detection result and a second detection result obtained by detecting electrical parameters of a front-stage bus and a rear-stage bus respectively, and a third detection result obtained by detecting whether a rear-stage main control board receives a signal sent by a front-stage main control board; and comprehensively considering the detection results of the electrical parameters of the front-stage bus and the rear-stage bus and the signal sent by the front-stage main control board, the working state of the two-stage converter can be judged more comprehensively, the start of the two-stage converter is strictly controlled, and potential dangerous conditions caused by wrong operations are prevented.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the field of motor control, and particularly to a two-stage converter abnormality detection method and system. BACKGROUND

[0002] A two-stage converter refers to a power conversion system composed of two cascaded power converters. The two converters are usually a front stage and a rear stage. The front stage (or upstream converter) is usually a rectifier, which mainly converts the input AC power into DC power. The rear stage (or downstream converter) is usually an inverter, which mainly converts the DC power into the required AC power. For cascaded converters, the front and rear stages need to be connected through a connector. When the connector is abnormal, it may cause the system to work abnormally, and even worse, the cascaded converter is a power loop. Once the power loop is incorrectly operated, it may cause a serious consequence of blowing up the machine. Therefore, the cascaded converter needs more stringent start-up control. SUMMARY

[0003] To solve the above problems, embodiments of the present application provide a two-stage converter abnormality detection method and system, which aims to monitor the working state of the two-stage converter and handle abnormal situations to ensure the normal operation of the two-stage converter.

[0004] In a first aspect, embodiments of the present application provide a two-stage converter abnormality detection method, the two-stage converter comprising a front stage master control board and a rear stage master control board, the front stage master control board and the rear stage master control board being connected in communication through a connector, the method comprising:

[0005] respectively detecting whether the electrical parameters of a front stage bus corresponding to the front stage master control board and a rear stage bus corresponding to the rear stage master control board are normal, to obtain a first detection result corresponding to the front stage bus and a second detection result corresponding to the rear stage bus;

[0006] detecting whether the rear stage master control board receives a signal sent by the front stage master control board to obtain a third detection result, wherein the signal is transmitted through the connector;

[0007] determining whether to enable an inverter loop according to the first detection result, the second detection result and the third detection result.

[0008] In an embodiment, the determination of whether to enable the inverter loop according to the first detection result, the second detection result and the third detection result comprises:

[0009] if the first detection result and the second detection result are both normal, and the third detection result is that the signal has been received, then the inverter loop is enabled;

[0010] if the first detection result and the second detection result are both normal, and the third detection result is that no signal is received, enabling the inverter loop and determining that the abnormal type is a connector abnormality;

[0011] otherwise, not enabling the inverter loop.

[0012] In an embodiment, the not enabling the inverter loop further includes: if the first detection result and the second detection result are both abnormal, and the third detection result is that a signal is received, determining that the abnormal type is a connector abnormality.

[0013] In an embodiment, the method further includes: sending the abnormal type to a host computer, so that the host computer displays the abnormal type.

[0014] In an embodiment, the separately detecting whether the electrical parameters of the front-stage busbar corresponding to the front-stage master control board and the rear-stage busbar corresponding to the rear-stage master control board are normal, to obtain the first detection result corresponding to the front-stage busbar and the second detection result corresponding to the rear-stage busbar, includes:

[0015] separately detecting the electrical parameters of the front-stage busbar and the rear-stage busbar within a preset time, and judging whether the electrical parameters of the front-stage busbar and the rear-stage busbar are within a preset electrical parameter threshold, to obtain the first detection result corresponding to the front-stage busbar and the second detection result corresponding to the rear-stage busbar.

[0016] In an embodiment, the signal is an enable signal, used to represent that the front-stage master control board is ready to run.

[0017] In an embodiment, the connector is a connector row including a plurality of pins, and a pin transmitting the enable signal is located at an end of the connector row.

[0018] In a second aspect, the embodiments of the present application further provide a two-stage converter system, which includes:

[0019] a front-stage master control board;

[0020] a rear-stage master control board;

[0021] a connector, the front-stage master control board and the rear-stage master control board being communicatively connected through the connector;

[0022] an electrical detection circuit, configured to detect electrical parameters of a front-stage busbar corresponding to the front-stage master control board and electrical parameters of a rear-stage busbar corresponding to the rear-stage master control board;

[0023] An abnormality detection module is configured to determine whether electrical parameters of the front-stage bus corresponding to the front-stage master control board and the rear-stage bus corresponding to the rear-stage master control board are normal respectively, to obtain a first detection result of the front-stage bus and a second detection result of the rear-stage bus, to detect whether the rear-stage master control board receives a signal sent by the front-stage master control board, and to obtain a third detection result, wherein the signal is transmitted through the connector; and to determine whether to enable the inverter loop according to the first detection result, the second detection result and the third detection result.

[0024] In an embodiment, the system further comprises a host computer configured to receive and display the abnormality type sent by the abnormality detection module.

[0025] As can be seen from the above technical solutions, the embodiments of the present application have the following advantages: the first detection result and the second detection result obtained by detecting the electrical parameters of the front-stage bus and the rear-stage bus respectively, and the third detection result obtained by detecting whether the rear-stage master control board receives the signal sent by the front-stage master control board, are used to determine whether to enable the inverter loop; by comprehensively considering the detection results of the electrical parameters of the front-stage bus and the rear-stage bus, the signal sent by the front-stage master control board and other aspects, the working state of the two-stage converter can be more comprehensively judged, the start of the two-stage converter is strictly controlled, and potential dangerous situations caused by incorrect operation are prevented. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of the provided drawings.

[0027] Figure 1 A flowchart of a two-stage converter abnormality detection method provided by the embodiments of the present application is shown;

[0028] Figure 2 A local interface diagram of a host computer displaying an abnormality type provided by the embodiments of the present application is shown;

[0029] Figure 3 A waveform diagram of normal inverter and switching of a two-stage converter provided by the embodiments of the present application is shown. DETAILED DESCRIPTION

[0030] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0031] Two-stage converter refers to a power conversion system composed of two cascaded power converters. It is composed of a front stage and a rear stage. The front stage (or upstream converter) is usually a rectifier, which mainly converts the input AC power into DC power. The rear stage (or downstream converter) is usually an inverter, which mainly converts the DC power into the required AC power. Cascaded converter refers to a system composed of two or more cascaded power converters. In the cascaded converter, the front and rear stages usually need to be connected through a connector. If the connector is abnormal, it may cause the system to work abnormally. Especially when the cascaded converter is used as a power loop, incorrect operation of the power loop may cause serious consequences. Therefore, more strict start-up control needs to be implemented for the two-stage converter.

[0032] Therefore, in various embodiments of the present application, the first detection result obtained by detecting the electrical parameters of the front bus corresponding to the front master control board and the second detection result obtained by detecting the electrical parameters of the rear bus corresponding to the rear master control board are combined with the third detection result obtained by detecting whether the rear master control board receives the signal sent by the front master control board, so as to detect the abnormal condition of the two-stage converter, thereby strictly controlling the start-up of the converter and preventing potential dangerous conditions caused by incorrect operation.

[0033] The various embodiments of the present application will be described in further detail below with reference to the drawings.

[0034] The embodiments of the present application provide a two-stage converter abnormality detection method, as shown in Figure 1 The method comprises steps S101-S103.

[0035] S101: Detect whether the electrical parameters of the front bus corresponding to the front master control board and the rear bus corresponding to the rear master control board are normal, respectively, to obtain the first detection result of the front bus and the second detection result of the rear bus.

[0036] In the two-stage converter system, the electrical parameters of the bus corresponding to the front master control board and the rear master control board are detected to ensure the normal operation of the system. Specifically, the electrical parameters of the front bus corresponding to the front master control board and the rear bus corresponding to the rear master control board are detected respectively, and whether the detected electrical parameters are normal is judged. Here, the electrical parameters used for detection and judgment include but are not limited to: DC or AC voltage, DC or AC current, input or output power, input or output frequency, temperature, impedance.

[0037] In some possible embodiments, if temperature is selected as the electrical parameter, the temperature of the bus bar can be monitored to ensure that the system does not exceed the safe temperature range. In addition, the temperature of the main control board and other key components can also be detected according to actual needs. If impedance is selected as the electrical parameter, the current impedance can be detected to ensure the normal flow of current in the circuit. Or the voltage impedance is detected to ensure that the voltage is transmitted in the system with normal impedance. The detection of these electrical parameters can be realized by the main control board, sensors, measurement circuits, microprocessors, etc., and monitored in real time by the main control board or monitoring unit.

[0038] In another possible embodiment, detection circuits can be provided on the front and rear main control boards. The front main control board can detect the positive bus bar and the negative bus bar. The rear main control board can detect the positive bus bar and the negative bus bar. If any abnormality is detected, the system can take appropriate measures, such as alarm, automatic switching to standby system or taking other protective measures, to ensure the safe and reliable operation of the system.

[0039] In the actual application of the embodiment, the front bus bar is connected with the rear bus bar, so that the front bus bar and the rear bus bar are in communication. This connection mode can also promote the effectiveness of energy transmission and system operation.

[0040] It should be noted that in the embodiments of the present application, the two-stage converter can include a DC / DC converter, a DC / DC charger, an AC / DC UPS, etc., which are not limited in the present application.

[0041] It should be noted that the embodiments of the present application record the detection results of the front bus bar or the rear bus bar by adding front bus bar state flag bits and rear bus bar state flag bits. The added bus bar state flag bits are a kind of logical flag used to indicate the identification of the bus bar detection state. It can be understood as a kind of virtual state realized by software logic and programming, representing the electrical state of the bus bar, such as normal detection (1) or abnormal detection (0). After the electrical parameters are obtained by executing bus bar detection, the judgment result is converted into a logical flag. It can be understood that if the detection result is normal, the corresponding bus bar state flag bit is 1, and if the detection result is abnormal, the corresponding bus bar state flag bit is 0, which can be used as the basis for abnormal detection of the two-stage converter.

[0042] S102: Detect whether the rear main control board receives the signal sent by the front main control board to obtain a third detection result.

[0043] The system detects whether the subsequent main control board receives the signal from the preceding main control board, obtaining a third detection result; the signal is transmitted via a connector. Specific sensors, measuring devices, or detection circuits can be used to detect the arrival of the signal, and this application does not impose any specific limitations on this.

[0044] Specifically, in practical applications, a timed detection mechanism can be introduced. If no signal is received from the front-end main control board within a specified time, an alarm message can be output to alert the operator that an abnormality has occurred. Furthermore, indicator lights of specific colors can be installed around the rear-end main control board as needed. For example, a red light indicates that the rear-end main control board has not received a signal from the front-end main control board, while a green light indicates that the rear-end main control board has received a signal from the front-end main control board. Alternatively, an audible warning can be issued to indicate that no signal has been received from the front-end main control board. This provides a more intuitive understanding of the operating status of the two-stage converter and helps in timely handling of abnormalities.

[0045] S103: Based on the first detection result, the second detection result, and the third detection result, determine whether to enable the inverter loop.

[0046] Based on the first detection result (whether the electrical parameters of the upstream bus are normal), the second detection result (whether the electrical parameters of the downstream bus are normal), and the third detection result (whether the downstream main control board receives the signal from the upstream main control board), it is determined whether to enable the inverter loop. This comprehensive judgment of the detection results from different parts yields a more accurate assessment of the anomaly type, allowing for targeted measures to be taken based on specific detection conditions, thus improving the efficiency of anomaly detection and maintenance.

[0047] In some feasible implementations, after the anomaly type is determined, an anomaly history function can be added to analyze the causes and frequency of anomalies in order to improve system design and predict possible failures.

[0048] In this embodiment, anomaly detection can be achieved without the need for additional circuitry. The first and second detection results, obtained by detecting the electrical parameters of the front-stage and rear-stage buses respectively, along with a third detection result obtained by detecting whether the rear-stage main control board receives a signal from the front-stage main control board, determine whether to enable the inverter loop. By comprehensively considering the electrical parameters of the front-stage and rear-stage buses, the signals from the front-stage main control board, and other detection results, the operating status of the two-stage converter can be more comprehensively assessed, the startup of the two-stage converter can be strictly controlled, and potential dangerous situations caused by erroneous operation can be prevented.

[0049] In order to enable the two-stage converter to start running in actual normal conditions, in an embodiment, according to the first detection result, the second detection result and the third detection result, it is determined whether to enable the inverter loop, including: if the first detection result and the second detection result are both normal, and the third detection result is that the signal has been received, the inverter loop is enabled; if the first detection result and the second detection result are both normal, and the third detection result is that the signal has not been received, the inverter loop is enabled and it is determined that the abnormal type is the connector abnormality; otherwise, the inverter loop is not enabled.

[0050] Specifically, if the first detection result and the second detection result represent that the electrical parameters of the front-stage bus and the rear-stage bus are both normal, and the third detection result represents that the rear-stage main control board receives the signal sent by the front-stage main control board, it represents that the two-stage converter is in a normal state and can be normally invertered. At this time, the two-stage converter is in a normal state, and enabling the inverter loop will not cause the occurrence of serious dangerous conditions such as machine explosion, so the two-stage converter can be normally invertered. As shown in FIG. 8, such a design aims to feed back the normal working state of the two-stage converter, and ensure that the two-stage converter can provide reliable power conversion under normal running conditions. Figure 3

[0051] If the first detection result and the second detection result represent that the electrical parameters of the front-stage bus and the rear-stage bus are both normal, and the third detection result represents that the rear-stage main control board does not receive the signal sent by the front-stage main control board, it can be determined that the abnormal type is the connector abnormality. It can be understood that due to the connector abnormality, the rear-stage main control board fails to receive the signal sent by the front-stage main control board, resulting in that the system incorrectly judges that the machine state is abnormal. That is to say, although the two-stage converter is actually in a normal working state, the system incorrectly judges due to the hardware connector abnormality, leading to that the two-stage converter has no inverter output. Based on this situation, in order to avoid the client power failure, the inverter loop can still be enabled to ensure the normal running of the two-stage converter. In addition to the above two cases in which the first detection result and the second detection result are both normal, in order to prevent the power loop from working under abnormal conditions, leading to the problem of equipment damage or performance decline, even the serious consequence of machine explosion, the inverter loop is not enabled in other cases. The specific content of other cases is described in the following embodiments.

[0052] By combining multiple detection results, the system can more accurately judge the current system state, so as to determine whether to enable the inverter loop according to the actual situation, which is helpful to quickly locate and solve the problem, and improve the stability and reliability of the system.

[0053] In order to comprehensively monitor the state of the two-stage converter, in an embodiment, the inverter loop is not enabled, and further includes: if the first detection result and the second detection result are both abnormal, and the third detection result is that the signal has been received, it is determined that the abnormal type is the connector abnormality.

[0054] ​If the first detection result and the second detection result represent that the electrical parameters of the front bus and the rear bus are both abnormal, and the third detection result represents that the rear master control board has received the signal sent by the front master control board, it can be determined that the abnormal type is the connector abnormality; through the first detection result and the second detection result, it can be known that the actual bus voltage state is abnormal, or an abnormality occurs in the process of sampling the bus, for safety, the inverter loop is not enabled, to prevent the equipment from being damaged due to the error of enabling the power loop.

[0055] Please refer to Table 1, which shows the relationship between the front bus detection result, the rear bus detection result, whether the rear master control board receives the signal sent by the front master control board and the system working state. The following will be further described in combination with Table 1, wherein the numbers 0 in the first detection result and the second detection result columns in the table represent detection abnormality, and the numbers 1 represent normal detection; the number 0 in the third detection result column represents that the signal sent by the front master control board is not received, and the number 1 represents that the signal sent by the front master control board is received.

[0056] Table 1

[0057]

[0058] Please understand in combination with Table 1, which contains the three cases described in the foregoing embodiments, in addition to the three cases, it also includes:

[0059] If the front bus electrical parameter detection is abnormal and the rear bus electrical parameter detection is normal, and the third detection result is that the signal sent by the front master control board is received or not received, both of these two cases can determine that the corresponding abnormal type is the front bus sampling abnormality; if the rear bus electrical parameter detection is abnormal and the front bus electrical parameter detection is normal, and the third detection result is that the signal sent by the front master control board is received or not received, both of these two cases can also determine that the corresponding abnormal type is the rear bus sampling abnormality. In order to prevent the power loop from being operated by mistake and causing the two-stage converter to not work normally, if the abnormal type is the front bus sampling abnormality or the rear bus sampling abnormality, the inverter loop is not enabled.

[0060] It should be understood that if the bus sampling is abnormal, the input feedback of the front and rear communication loops will also be abnormal, in this case, the normal logic of the two-stage converter will not trigger the operation, therefore the inverter loop is not enabled.

[0061] In addition, if the first detection result and the second detection result are both abnormal and the third detection result is that the signal sent by the front-stage main control board is not received, it is determined that the two-stage converter is not started. In the foregoing embodiment, the comprehensive analysis of the first, second and third detection results is used to determine whether to enable the inversion conversion path. In particular, there is also a case that the first and second detection results are both abnormal and the third detection result is that the signal sent by the front-stage main control board is not received, and in this case, it can be determined that the two-stage converter is not started. Such a design aims to comprehensively monitor the state of the two-stage converter.

[0062] In order to know the state of the two-stage converter in real time, in an embodiment, the type of the abnormality is sent to the upper computer to enable the upper computer to display the type of the abnormality.

[0063] The purpose of sending the type of the abnormality to the upper computer is to realize the abnormality notification and real-time monitoring. Please refer to Figure 2 , Figure 2 The local interface of the upper computer to display the type of the abnormality is shown in FIG. 6. Figure 2 It is shown that the detection results of the front-stage bus and the rear-stage bus are both normal and the rear-stage main control board does not receive the signal sent by the front-stage main control board, and the type of the abnormality determined in this case is the connector abnormality, and then the upper computer displays the connector abnormality. Through the upper computer, the operator can know the working state of the two-stage converter in real time, especially the type of the abnormality, so that the operator can take measures more timely when the abnormality occurs, reduce downtime and loss, and help improve the maintainability and fault diagnosis capability of the system.

[0064] In addition, in actual application, in addition to sending the type of the abnormality to the upper computer for display, the abnormality processing suggestion can be provided according to the historical abnormality record and the corresponding solution measure, to help the operator better cope with the specific type of abnormality.

[0065] In another feasible embodiment, real-time log recording can also be realized locally in the two-stage converter, to facilitate subsequent analysis and fault diagnosis. An automatic alarm system can also be introduced as needed, to send the abnormality notification to the relevant personnel through other communication modes such as email, short message or mobile terminal message push, to respond to the abnormality more timely.

[0066] In order to realize the monitoring of the health state of the system to determine whether the electrical parameter is abnormal, in an embodiment, whether the electrical parameter of the front-stage bus corresponding to the front-stage main control board and the electrical parameter of the rear-stage bus corresponding to the rear-stage main control board are normal is detected respectively, to obtain the first detection result corresponding to the front-stage bus and the second detection result corresponding to the rear-stage bus, including: detecting the electrical parameter of the front-stage bus and the rear-stage bus within a preset time respectively, determining whether the electrical parameter of the front-stage bus and the rear-stage bus is within a preset electrical parameter threshold, to obtain the first detection result corresponding to the front-stage bus and the second detection result corresponding to the rear-stage bus.

[0067] It should be noted that the preset time mentioned here can be set to a small time length, such as 3s or 5s, which can be set by the person skilled in the art as needed, and the present application does not limit this.

[0068] In actual application, the bus is a double bus, i.e. a positive bus and a negative bus. By detecting the electrical parameters of the positive bus and the negative bus of the front-stage master control board and the rear-stage master control board within the preset time, it is determined whether the electrical parameters of the front-stage bus and the rear-stage bus are within the preset electrical parameter threshold. Here, in order to ensure that the bus voltage is within a reasonable working range and to perform normal detection within this range, in some feasible embodiments, the electrical parameter can be designed as the voltage value 360VDC in the steady state of the bus, and the normal working range is ±10V. The voltage value within this range determines that the bus electrical parameter detection is normal. If it exceeds this range, it is determined that the bus electrical parameter detection is abnormal. It should be noted that the normal working range of the voltage value mentioned here can be set by the person skilled in the art according to business needs and products, and the present application does not limit this. If the working voltage needs to be adjusted in future design, the preset electrical parameter threshold range can be modified to adapt to new needs, without the need to completely change the system design, which can timely find potential problems, such as unstable power supply or other faults, so as to take corresponding measures to maintain the normal operation of the system and prevent more serious problems caused by voltage abnormalities in the electrical system.

[0069] In an embodiment, the signal is an enable signal, which is used to represent that the front-stage master control board is ready to run.

[0070] According to the first detection result obtained by detecting the front-stage bus according to the above steps, it is determined whether the front-stage master control board sends an enable signal. Here, the enable signal refers to a signal indicating that the front-stage master control board in the two-stage converter is ready and can work normally, representing that the front-stage master control board is ready to run. The enable signal can be used as a trigger signal for other parts to ensure that different modules in the system work cooperatively at the appropriate time. For example, in the embodiment of the present application, the enable signal is one of the trigger conditions for enabling the inverter loop. When the front-stage master control board is ready to run, it sends an enable signal to the rear-stage master control board to ensure that the front-stage master control board and the rear-stage master control board in the two-stage converter work cooperatively at the appropriate time.

[0071] It should be noted that in actual application, the specific practical application of the enable signal may be different due to business demand scenarios. For example, a double or multiple detection mechanism can be adopted, multiple signals are used for multiple detection, for example, in addition to the enable signal, the normality of the bus current, impedance and other signals can be considered as one of the detection conditions, and when multiple signals meet the preset conditions at the same time, it indicates that the system can normally enable the inverse transformation road. Further, a confirmation mechanism can be introduced in the communication between the front and rear master control boards, and some check bits or confirmation signals can be added in the communication protocol to ensure that the signals sent by the front master control board can be normally received by the rear master control board.

[0072] In order to more conveniently connect with other component modules, in an embodiment, the connector is a connector strip including a plurality of pins, and the pin for transmitting the enable signal is located at the end of the connector strip.

[0073] Here, integrating the pin at the end of the connector strip can realize compact design, save space, and help realize higher integration and performance in limited space. It should be noted that in the specific project design implementation, considering the specific application scenario, system demand and related standards and specifications, the connector can be adaptively adjusted in design.

[0074] Further, in the embodiment of the present application, a pin coding system can also be introduced to distinguish different types of signal transmission through different pin coding, increase the flexibility and scalability of the system.

[0075] In addition, it should be noted that in actual application, when plugging the connector, the two ends of the connector are prone to poor contact, resulting in abnormal signal transmission process and even machine failure, so the signals at the two ends are more reliable for judging the abnormality of the connector.

[0076] In order to realize the two-stage converter abnormality detection method of the embodiment of the present application, the embodiment of the present application further provides a two-stage converter abnormality detection system, which comprises: a front master control board, a rear master control board, a connector, an electrical detection circuit and an abnormality detection module.

[0077] The front master control board;

[0078] The rear master control board;

[0079] The connector, the front master control board and the rear master control board are communicatively connected through the connector;

[0080] The electrical detection circuit is used for detecting the electrical parameters of the front bus corresponding to the front master control board and the electrical parameters of the rear bus corresponding to the rear master control board;

[0081] An abnormality detection module is configured to detect whether the electrical parameters of the front-stage bus corresponding to the front-stage master control board and the rear-stage bus corresponding to the rear-stage master control board are normal respectively, to obtain a first detection result corresponding to the front-stage bus and a second detection result corresponding to the rear-stage bus, and to detect whether the rear-stage master control board receives a signal sent by the front-stage master control board, to obtain a third detection result, wherein the signal is transmitted through the connector. According to the first detection result, the second detection result and the third detection result, it is determined whether to enable the inverter loop.

[0082] Here, the connector is a connector bank including a plurality of pins, and the pin transmitting the enable signal is located at the end of the connector bank. The front-stage master control board and the rear-stage master control board are communicatively connected through the connector. Through the connector, the front-stage master control board and the rear-stage master control board can exchange information, share detection results and other necessary data, work cooperatively and ensure the normal operation of the system.

[0083] An electrical detection circuit is configured to detect the electrical parameters of the front-stage bus corresponding to the front-stage master control board and the rear-stage bus corresponding to the rear-stage master control board. This is a key component for the system to monitor the electrical parameters. Through the detection data of the electrical parameters of the front-stage bus and the rear-stage bus, it can be determined whether the system is in a normal working state and potential electrical problems can be identified. It should be noted that the electrical detection circuit can be integrated on the front-stage master control board and the rear-stage master control board, so that the front-stage master control board and the rear-stage master control board can directly read the data collected by the electrical detection circuit, realize faster and real-time data exchange, and thus more conveniently monitor, diagnose and control faults, make decisions and responses in a timely manner, and reduce the cables and connection lines between components, simplify the physical layout and connection of the system. In addition, for the consideration of system modularization or to better adapt to the physical layout and requirements of the system, the electrical detection circuit can also be placed in a position other than the front-stage master control board and the rear-stage master control board, such as an independent module or an additional board, and the specific position of the electrical detection circuit is not limited.

[0084] The front-stage master control board and the rear-stage master control board are core components of the two-stage converter abnormality detection system. The abnormality detection module can be arranged on the front-stage master control board as a functional module of the front-stage master control board. Alternatively, the abnormality detection module can be arranged on the rear-stage master control board as a functional module of the rear-stage master control board. Alternatively, part of the functional modules of the abnormality detection module can be arranged on the front-stage master control board and part of the functional modules of the abnormality detection module can be arranged on the rear-stage master control board. Alternatively, the abnormality detection module can be a control module independent of the front-stage master control board and the rear-stage master control board. The abnormality detection module is configured to determine whether the electrical parameters of the front-stage bus corresponding to the front-stage master control board and the rear-stage bus corresponding to the rear-stage master control board are normal. Through the determination, a first detection result corresponding to the front-stage bus and a second detection result corresponding to the rear-stage bus are obtained. In addition, the abnormality detection module also performs other functions, such as detecting whether the rear-stage master control board receives a signal sent by the front-stage master control board, thereby obtaining a third detection result. Finally, by comprehensively integrating the first, second, and third detection results, the abnormality detection module can determine whether to enable the inverter loop and determine the abnormality type, i.e., the nature of the problem occurring in the system.

[0085] In this way, the two-stage converter abnormality detection system can monitor and determine the electrical parameters of the front-stage bus and the rear-stage bus through the cooperative work of the front-stage master control board, the rear-stage master control board, the connector, the electrical detection circuit, and the abnormality detection module, thereby realizing real-time monitoring of the system state and determination of the abnormality type and determining whether to enable the inverter loop.

[0086] In an embodiment, the two-stage converter abnormality detection system further comprises a host computer configured to receive the abnormality type sent by the abnormality detection module and display the abnormality type.

[0087] The host computer refers to a computer or device responsible for high-level control and monitoring in a control system. In the embodiments of the present application, the main function of the host computer is to receive the abnormality type information sent by the abnormality detection module and display the abnormality type information. The host computer is usually connected with the master control board or the core control unit of the system, and the connection realizes communication with the bottom control system.

[0088] Specifically, the host computer can exchange data with the abnormality detection module through a communication protocol and receive the abnormality type information from the abnormality detection module. After receiving the abnormality type information, the host computer displays the information in a user-friendly manner, usually in the form of a graphical interface or text to present to the operator or system administrator.

[0089] The display function of the host computer is crucial for quickly diagnosing problems in the system and performing timely maintenance and repair work. Through the host computer, the operator can quickly understand the health status of the system and take necessary measures to deal with any abnormal situation, thereby improving the reliability and stability of the system.

[0090] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0091] In several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0092] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0093] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present alone, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0094] If the integrated unit is realized in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the part of the prior art that makes a contribution or the whole or part of the technical solutions can be embodied in the form of a software product, which is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the embodiments of the method of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various program code storage media.

Claims

1. A two-stage converter anomaly detection method, characterized by, The two-stage converter comprises a front-stage master control board and a rear-stage master control board, the front-stage master control board and the rear-stage master control board are communicatively connected through a connector, and the method comprises the following steps: Respectively detecting whether electrical parameters of a front-stage bus corresponding to the front-stage master control board and a rear-stage bus corresponding to the rear-stage master control board are normal, obtaining a first detection result corresponding to the front-stage bus and a second detection result corresponding to the rear-stage bus; Detecting whether the rear-stage master control board receives a signal sent by the front-stage master control board, obtaining a third detection result, wherein the signal is transmitted through the connector; According to the first detection result, the second detection result and the third detection result, determining whether to enable an inverter loop; The method according to the first detection result, the second detection result and the third detection result, determining whether to enable the inverter loop, comprises the following steps: If the first detection result and the second detection result are both normal, and the third detection result is that the signal has been received, then the inverter loop is enabled; If the first detection result and the second detection result are both normal, and the third detection result is that the signal has not been received, then the inverter loop is enabled and an abnormal type is determined to be a connector abnormality; Otherwise, the inverter loop is not enabled.

2. The two-stage converter anomaly detection method according to claim 1, characterized by, The method of not enabling the inverter loop further comprises the following steps: If the first detection result and the second detection result are both abnormal, and the third detection result is that the signal has been received, then the abnormal type is determined to be a connector abnormality.

3. The two-stage converter anomaly detection method according to any one of claims 1-2, characterized in that, The method further comprises the following steps: Sending the abnormal type to an upper computer, so that the upper computer displays the abnormal type.

4. The two-stage converter anomaly detection method of claim 1, wherein The method of respectively detecting whether electrical parameters of a front-stage bus corresponding to the front-stage master control board and a rear-stage bus corresponding to the rear-stage master control board are normal, obtaining a first detection result corresponding to the front-stage bus and a second detection result corresponding to the rear-stage bus, comprises the following steps: Respectively detecting electrical parameters of the front-stage bus and the rear-stage bus within a preset time, judging whether the electrical parameters of the front-stage bus and the rear-stage bus are within a preset electrical parameter threshold, obtaining the first detection result corresponding to the front-stage bus and the second detection result corresponding to the rear-stage bus.

5. The two-stage converter anomaly detection method according to any one of claims 1-2, characterized in that, The signal is an enabling signal, used to represent that the front-stage master control board is ready to run.

6. The two-stage converter anomaly detection method according to claim 5, characterized by, The connector is a connector strip comprising a plurality of pins, and the pin transmitting the enabling signal is located at an end of the connector strip.

7. A two-stage converter system characterized by, The two-stage converter system comprises: a front-stage master control board; a rear-stage master control board; a connector, the front-stage master control board and the rear-stage master control board are communicatively connected through the connector; an electrical detection circuit, used to detect electrical parameters of a front-stage bus corresponding to the front-stage master control board and electrical parameters of a rear-stage bus corresponding to the rear-stage master control board; Anomaly detection module, used for judging whether the electrical parameters of the front-stage bus corresponding to the front-stage master control board and the rear-stage bus corresponding to the rear-stage master control board are normal respectively, obtaining a first detection result corresponding to the front-stage bus and a second detection result corresponding to the rear-stage bus; detecting whether the rear-stage master control board receives a signal sent by the front-stage master control board, obtaining a third detection result, wherein the signal is transmitted through the connector; determining whether to enable the inverter loop according to the first detection result, the second detection result and the third detection result; The anomaly detection module is specifically used for: If the first detection result and the second detection result are both normal, and the third detection result is that the signal has been received, the inverter loop is enabled. If the first detection result and the second detection result are both normal, and the third detection result is that the signal has not been received, the inverter loop is enabled and the anomaly type is determined to be connector anomaly. Otherwise, the inverter loop is not enabled.

8. The two-stage converter system of claim 7, wherein, The system further comprises: The upper computer is used for receiving and displaying the anomaly type sent by the anomaly detection module.

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