Fault Diagnosis and Processing Method, System and Storage Medium for Wireless Power Transmission System

Abstract

The present invention belongs to the technical field of wireless power transmission, and discloses a method, a system and a storage medium for fault diagnosis and processing of a wireless power transmission system. Corresponding sensors are used to collect electrical quantities at specific positions in the power transmission system in real time, and the electrical quantities are transmitted to a digital signal processor (DSP) through a conversion circuit. Then, the DSP judges the transmitted data. If the judgment result is that the system has a fault, the result is transmitted to a controller through the conversion circuit. The controller implements corresponding fault handling measures according to the fault type, and finally eliminates the fault, thereby ensuring the normal operation of the system. Based on the traditional wireless power transmission system, the present invention realizes the safe, reliable and stable transmission of electric energy. Moreover, for the possible faults of the wireless power transmission system, by adopting the fault diagnosis and processing method proposed by the present invention, the power supply reliability and operation stability of the power transmission system can be guaranteed.

Description

Technical Field

[0001] The present invention belongs to the field of wireless power transfer (WPT) technology, and particularly relates to a method, a system and a storage medium for fault diagnosis and processing of a wireless power transfer system. Background Art

[0002] At present, wireless power transfer (WPT) technology refers to a power transfer technology that directly converts electrical energy into forms such as electromagnetic waves, light waves, and sound waves without wires or other physical contacts, and transfers energy from a power source to a load through space. This technology realizes complete electrical isolation between the power source and the load, and has advantages such as safety, reliability, and flexibility that are unparalleled by traditional power transfer methods. However, due to various inevitable faults in the power transfer circuit between the power source and the electrical equipment (load) during operation, the power supply reliability and operation stability of the system cannot be guaranteed. Existing traditional wireless power transfer systems do not have any fault diagnosis and processing measures. When a fault occurs in the system, for example, the power electronic switch device in the AC-DC-AC power converter fails to commutate, resulting in a short circuit loop formed by the external 220V mains power supply through the switch device. Not only the reliable and stable power supply of the present power transfer system cannot be guaranteed, but also the normal power supply of the mains power to other loads will be affected, and even the mains power supply will be damaged. The existence of various types of faults endangers the power supply reliability and operation stability of the system. So far, domestic and foreign scholars have not proposed corresponding fault diagnosis and processing methods for the possible fault problems of traditional wireless power transfer systems. Therefore, it is very necessary to propose a fault diagnosis and processing method for the possible fault problems of wireless power transfer systems.

[0003] Through the above analysis, the problems and defects existing in the prior art are as follows:

[0004] (1) Due to various inevitable faults in the power transfer circuit between the power source and the electrical equipment during operation, the power supply reliability and operation stability of the power transfer system cannot be guaranteed. When a fault occurs in an existing traditional wireless power transfer system, there are no any fault diagnosis and processing measures, so the power supply reliability and operation stability of the system will be seriously reduced.

[0005] (2) So far, domestic and foreign scholars have not proposed corresponding fault diagnosis and processing methods for the possible fault problems of traditional wireless power transfer systems.

[0006] The difficulties in solving the above problems and defects are as follows:

[0007] (1) Based on the traditional wireless power transfer system, the proposed fault diagnosis and handling method will increase the circuit complexity and the overall volume of the system because additional circuit components such as sensors and digital signal processors will be added.

[0008] (2) Based on the traditional wireless power transfer system, the proposed fault diagnosis and handling method. Considering issues such as cost and the overall volume of the system, if the electrical quantity detection results at the transmitting end and the receiving end of the traditional wireless power transfer system are both transmitted to the same digital signal processor (DSP), then the communication part between the transmitting end and the receiving end needs to be increased, thereby increasing the control complexity and difficulty.

[0009] The significance of solving the above problems and defects is as follows:

[0010] Based on the traditional wireless power transfer system, the proposed fault diagnosis and handling method for possible faults in the power transfer circuit greatly ensures the power supply reliability and operation stability of the power transfer system. Summary of the Invention

[0011] Aiming at the possible faults that may occur during the operation of the traditional wireless power transfer system, the present invention provides a fault diagnosis and handling method, system and storage medium for the wireless power transfer system.

[0012] The present invention is implemented as follows. A fault diagnosis and handling method for a wireless power transfer system. The fault diagnosis and handling method for the wireless power transfer system uses a corresponding sensor to collect the electrical quantity at a specific position in the power transfer system in real time, and transmits the electrical quantity to a digital signal processor (DSP) through a conversion circuit. Then, the digital signal processor (DSP) judges the transmitted data; if the judgment result is that the system has a fault, the result is transmitted to the controller through the conversion circuit. The controller implements corresponding fault handling measures according to the fault type, and finally eliminates the fault to ensure the normal operation of the system.

[0013] Further, the fault diagnosis and handling method for the wireless power transfer system includes the following steps:

[0014] Step 1, when the Hall voltage sensor 1 (HVS1) collects that there is no potential difference between points a and b, that is, U ab = 0, the collected data is converted by the A / D converter ① and then transmitted to the digital signal processor (DSP); the digital signal processor (DSP) compares the received value with the voltage value U abs between points a and b when the system is operating normally and preset inside, and obtains a judgment result;

[0015] Step 2, when the current I at the detection point of the Hall current sensor 1 (HCS1) c = 0, that is, no current flows through the branch where point c is located. The collected data is converted by the A / D converter ② and then transmitted to the digital signal processor (DSP); the digital signal processor (DSP) internally compares the received value with the preset current value I at this point when the system is operating normally cs and obtains a judgment result;

[0016] Step 3, when the Hall voltage sensor 2 (HVS2) collects that there is no potential difference between points d and e, that is, U de = 0, the collected data is converted by the A / D converter ③ and then transmitted to the digital signal processor (DSP); the digital signal processor (DSP) internally compares the received value with the preset voltage value U between points d and e when the system is operating normally des and obtains a judgment result;

[0017] Step 4, when the current I at the detection point of the Hall current sensor 2 (HCS2) f = 0, that is, no current flows through the branch where point f is located. The collected data is converted by the A / D converter ④ and then transmitted to the digital signal processor (DSP); the digital signal processor (DSP) internally compares the received value with the preset current value I at this point when the system is operating normally fs and obtains a judgment result.

[0018] Furthermore, the judgment result in Step 1 is:

[0019] There is a short - circuit fault in the transmitting - end part of the wireless power transfer system, resulting in no potential difference between points a and b, that is, U ab = 0; under this short - circuit fault, the system is in a fourth - order damped oscillation state. After three oscillation periods, the transmitting end and the receiving end return to a stable state; the judgment result is sent to the controller through the D / A converter. The controller switches the contact of the solid - state relay ① (SSR①) from position 1 to position 2, that is, by introducing another set of 220V mains power supply, AC - DC - AC power converter and compensation circuit part, that is, adding a backup, finally eliminating the system fault, and then ensuring reliable and stable power supply to the electrical equipment.

[0020] Furthermore, the judgment result in Step 2 is:

[0021] There is an open - circuit fault in the transmitting - end part of the wireless power transfer system, causing no current to flow through the branch where point c is located, that is, I c = 0; Under this open - circuit fault, the system is in a second - order damped oscillation state; After two oscillation periods, the current value at the receiving end of the coupled coil will be zero; The judgment result is sent to the controller through a D / A converter, and the controller switches the contact of the solid - state relay ① (Solid State Relay ①, SSR①) from position 1 to position 2, that is, by introducing another set of 220V mains power supply, AC - DC - AC power converter and compensation circuit part, that is, adding a backup, and finally eliminating the system fault, thereby ensuring reliable and stable power supply to the electrical equipment.

[0022] Further, the judgment result in step three is:

[0023] There is a short - circuit fault in the receiving - end part of the wireless power transfer system, causing no potential difference between points d and e, that is, U de = 0; Under this short - circuit fault, the system is in a fourth - order damped oscillation state, and at this time, the system will show a detuning phenomenon. After seven detuning periods, first, the receiving end returns to a stable state, and during the dynamic process, an overshoot phenomenon occurs, where the current amplitude is three times that of the steady - state operation; The judgment result is sent to the controller through a D / A converter, and the controller switches the contact of the solid - state relay ② (Solid State Relay ②, SSR②) from position 3 to position 4, that is, by introducing a compensation circuit and a power conversion part, that is, adding a backup, and finally eliminating the system fault, thereby ensuring reliable and stable power supply to the electrical equipment.

[0024] Further, the judgment result in step four is:

[0025] There is an open - circuit fault in the receiving - end part of the wireless power transfer system, causing no current to flow through the branch where point f is located, that is, I f = 0; Under this open - circuit fault, the system is in a second - order damped oscillation state; After twenty oscillation periods, the system will return to a stable state, and at this time, the current will reach the maximum value, and the maximum value is four times the original steady - state operation current value; The judgment result is sent to the controller through a D / A converter, and the controller switches the contact of the solid - state relay ② (Solid State Relay ②, SSR②) from position 3 to position 4, that is, by introducing a compensation circuit and a power conversion part, that is, adding a backup, and finally eliminating the system fault, thereby ensuring reliable and stable power supply to the electrical equipment.

[0026] Further, the fault diagnosis and handling method of the wireless power transmission system is powered by a 220V mains power supply. The alternating current output is converted by an AC-DC-AC power converter to output high-frequency alternating current, which then passes through a compensation circuit, a transmitting coil, a receiving coil, and a compensation circuit to realize the wireless transmission of electrical energy from the transmitting end to the receiving end. According to the nature of the load, the power conversion device performs corresponding power conversion on this alternating current and finally supplies power to the load; Hall voltage or current sensors collect electrical quantities at specific positions in the system in real time. The output of the Hall voltage or current sensors is converted by an A / D converter and then transmitted to a digital signal processor (DSP). The DSP compares the transmitted signal with the signal related to the normal operation of the system set in advance; if there is a difference between the two, the DSP outputs a corresponding signal. This signal is converted by a D / A converter and then the controller implements corresponding control on the solid state relay, ultimately eliminating the fault and ensuring reliable and stable power supply to the load.

[0027] Another object of the present invention is to provide a wireless power transmission system fault diagnosis and handling system for implementing the above-mentioned wireless power transmission system fault diagnosis and handling method. The wireless power transmission system fault diagnosis and handling system includes: 220V mains power supply ①, 220V mains power supply ②: the power supply of the wireless power transmission system;

[0028] AC-DC-AC power converter ①, AC-DC-AC power converter ②: Since power electronic devices generate harmonics during operation and a high-frequency alternating magnetic field is required for the magnetic field coupling between the transmitting coil and the receiving coil, it is necessary to perform AC-DC-AC conversion on the alternating current output by the 220V mains power supply;

[0029] Compensation circuit ①, compensation circuit ②, compensation circuit ③, compensation circuit ④: Form resonance compensation with the inductance in the transmitting coil and the receiving coil, aiming to improve the power factor of the system;

[0030] Transmitting coil, receiving coil: Through the mutual inductance between the transmitting coil and the receiving coil, it aims to transfer the energy obtained by the transmitting end from the power supply to the receiving end, ultimately realizing the power supply to the load, that is, realizing wireless power transmission;

[0031] Power conversion ①, power conversion ②: The alternating current power obtained at the receiving end is subjected to corresponding power conversion according to the nature of the load, and finally the power supply to the load is realized;

[0032] Hall voltage sensor ①, Hall voltage sensor ②, Hall current sensor ①, Hall current sensor ②: Sensor elements used for voltage and current detection at specific positions in fault diagnosis;

[0033] A / D converters ①, ②, ③, ④, D / A converter: Since the electrical signals output by the Hall voltage or current sensor are analog signals, and these analog signals will be sent to the digital signal processor DSP for processing, and the inputs and outputs of the digital signal processor DSP are all digital signals, the analog signals output by the Hall voltage or current sensor should be converted into digital signals through the A / D converter, and the digital signals output by the digital signal processor DSP should be converted into analog signals through the D / A converter;

[0034] Digital signal processor DSP: A processor composed of large-scale or very large-scale integrated circuit chips used to complete digital signal processing tasks, which is used to process the voltage and current signals collected in real time by the Hall voltage or current sensor, make corresponding judgments, and finally transmit the output signal to the controller;

[0035] Controller: Implement corresponding fault handling measures according to the output of the digital signal processor DSP;

[0036] Solid state relays ①, ②: Non-contact switches composed of microelectronic circuits, discrete electronic devices, and power electronic power devices, which use isolation devices to isolate the control and the load end. In the present invention, the controller implements corresponding control on the solid state relay to eliminate faults in the power transmission system and ensure reliable and stable power supply to the load.

[0037] Another object of the present invention is to provide a computer device, the computer device includes a memory and a processor, the memory stores a computer program, and when the computer program is executed by the processor, the processor performs the following steps:

[0038] Use corresponding sensors to collect in real time the electrical quantities at specific positions in the energy transmission system, and transmit the electrical quantities to the digital signal processor (DSP) through a conversion circuit, and then the digital signal processor (DSP) makes a judgment on the transmitted data; if the judgment result is that there is a fault in the system, the result is transmitted to the controller through the conversion circuit, and the controller implements corresponding fault handling measures according to the fault type, and finally eliminates the fault to ensure the normal operation of the system.

[0039] Another object of the present invention is to provide a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the processor performs the following steps:

[0040] Use corresponding sensors to collect electrical quantities at specific positions in the power transmission system in real time, and transmit the electrical quantities to a digital signal processor (DSP) through a conversion circuit. Then, the digital signal processor (DSP) judges the transmitted data. If the judgment result is that there is a fault in the system, the result is transmitted to the controller through the conversion circuit. The controller implements corresponding fault handling measures according to the fault type, and finally eliminates the fault to ensure the normal operation of the system.

[0041] Another object of the present invention is to provide an information data processing terminal, and the information data processing terminal is used to implement the functions of the wireless power transmission system fault diagnosis and processing system.

[0042] Combined with all the above technical solutions, the advantages and positive effects of the present invention are as follows: The wireless power transmission system fault diagnosis and processing method provided by the present invention improves the power supply reliability and operation stability of the traditional wireless power transmission system.

[0043] Based on the traditional wireless power transmission system, the present invention realizes the safe, reliable and stable transmission of electric energy. And aiming at the possible faults of the wireless power transmission system, the fault diagnosis and processing method proposed by the present invention is adopted to ensure the power supply reliability and operation stability of the power transmission system.

[0044] Regarding the possible fault problems in the operation process of the traditional wireless power transmission system, the present invention proposes a fault diagnosis and processing method to ensure the power supply reliability and operation stability of the power transmission system.

[0045] Based on the traditional wireless power transmission system, in order to ensure the safe, reliable and stable transmission of electric energy, aiming at the possible faults in the operation process of the wireless power transmission system, the present invention proposes a fault diagnosis and processing method to finally ensure the power supply reliability and operation stability of the power transmission system.

[0046] The solid state relay provided by the present invention has the functions of diagnosing faults and handling faults, and the use of the solid state relay is to implement the fault handling function. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments of the present invention. Obviously, the following described drawings are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0048] Figure 1 It is a flowchart of the wireless power transmission system fault diagnosis and processing method provided by the embodiment of the present invention.

[0049] Figure 2 It is a flowchart of a method for fault diagnosis and handling of a wireless power transmission system provided by an embodiment of the present invention.

[0050] Figure 3 It is a schematic structural diagram of a system for fault diagnosis and handling of a wireless power transmission system provided by an embodiment of the present invention. Detailed implementation manners

[0051] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0052] In view of the problems existing in the prior art, the present invention provides a method, a system and a storage medium for fault diagnosis and handling of a wireless power transmission system. The present invention will be described in detail below with reference to the accompanying drawings.

[0053] As Figure 1 shown, the method for fault diagnosis and handling of a wireless power transmission system provided by an embodiment of the present invention includes the following steps:

[0054] S101, using corresponding sensors to collect electrical quantities at specific positions in the power transmission system in real time;

[0055] S102, transmitting the electrical quantity to a digital signal processor (DSP) through a conversion circuit, and then the digital signal processor (DSP) judges the transmitted data;

[0056] S103, if the judgment result is that the system has a fault, then transmit the result to the controller through the conversion circuit, and the controller implements corresponding fault handling measures according to the fault type to eliminate the fault and ensure the normal operation of the system.

[0057] The flowchart of the method for fault diagnosis and handling of a wireless power transmission system provided by an embodiment of the present invention is shown in Figure 2 .

[0058] The technical solution of the present invention will be further described below in conjunction with specific embodiments.

[0059] Regarding the possible fault problems in the operation process of the traditional wireless power transmission system, the present invention proposes a method for fault diagnosis and handling, and finally realizes the purpose of reliable power supply and stable operation of the power transmission system.

[0060] Refer to Figure 3As shown in the figure, the circuit devices related to the present invention are as follows: 220V mains power supply ①(②), AC-DC-AC power converter ①(②), compensation circuit ①(②, ③, ④), transmitting coil, receiving coil, power conversion ①(②), electrical equipment, Hall voltage sensor ①(②), Hall current sensor ①(②), A / D converter ①(②, ③, ④), D / A converter, digital signal processor (DSP), controller, solid state relay SSR ①(②).

[0061] The working principle related to the "Wireless Power Transmission System Fault Diagnosis and Processing Method, System and Storage Medium Method" of the present invention:

[0062] This wireless power transmission system is powered by a 220V mains power supply. The alternating current output is converted by an AC-DC-AC power converter to output high-frequency alternating current, and then through a compensation circuit, a transmitting coil, a receiving coil, and a compensation circuit, the electrical energy is wirelessly transmitted from the transmitting end to the receiving end. This alternating current is subjected to corresponding power conversion according to the nature of the load (DC load, AC load) through a power conversion device, and finally powers the load. When the traditional power transmission system is working, as Figure 3 shown: The Hall voltage (current) sensor in the figure collects the electrical quantities at specific positions of the system in real time. The output of the Hall voltage (current) sensor is converted by an A / D converter and then transmitted to the digital signal processor (DSP). The digital signal processor compares this transmitted signal with the signal related to the normal operation of the system set in advance. If there is a difference between the two, the digital signal processor (DSP) outputs a corresponding signal. This signal is converted by a D / A converter and then the solid state relay is controlled accordingly through the controller, finally eliminating the fault, and thus ensuring reliable and stable power supply to the load.

[0063] The working principle of the fault diagnosis and processing device: When the wireless power transmission system is operating normally:

[0064] (1) For its transmitting end, the voltage U between the two points detected by the Hall voltage sensor ① (Hall voltage sensor ①) ab ≠0, that is, there is a potential difference between points a and b; the current I at the point detected by the Hall current sensor ① (Hall current sensor ①) c ≠0, that is, there is current flowing through the branch where point c is located.

[0065] (2) Similarly, for its receiving end, the voltage U between the two points detected by the Hall voltage sensor ② (Hall voltage sensor ②) de≠0, that is, there is a potential difference between points d and e; the current I at the detection point of Hall current sensor ② f ≠0, that is, there is current flowing through the branch where point f is located. Through the Hall voltage sensor and the Hall current sensor, the voltage between points a and b, the voltage between points d and e, the current in the branch where point c is located, and the current in the branch where point f is located in the detection system are detected, and then the faults existing in the wireless power transmission system are diagnosed. And through the controller fault handling module, the corresponding processing is carried out on the faults existing in the system, and finally the power supply reliability and operation stability of the wireless power transmission system are ensured.

[0066] The present invention is implemented as follows: corresponding sensors are used to collect the electrical quantities at specific positions in the energy transmission system in real time, and the electrical quantities are transmitted to the digital signal processor (DSP) through the conversion circuit. The digital signal processor (DSP) makes corresponding judgments. If the judgment result is that there is a fault in the system, the result is transmitted to the controller through the conversion circuit. The controller implements corresponding fault handling measures according to the fault type, and finally eliminates the fault to ensure the normal operation of the system.

[0067] The fault diagnosis and handling method newly added to the traditional wireless power transmission system of the present invention has a working flow chart as Figure 2 shown as:

[0068] For the sake of simplicity of analysis and narration, it is assumed that there is only one single fault at a certain position in the system at a certain moment, and its fault type is a permanent fault, and the error brought by the time delay in the data transmission process for fault handling is not considered.

[0069] 1. When Hall voltage sensor ① collects that there is no potential difference between points a and b, that is, U ab =0, the collected data is converted by A / D converter ①, and then transmitted to the digital signal processor (DSP). The digital signal processor (DSP) compares the received value with the pre-set voltage value U between points a and b when the system is operating normally inside it. abs The judgment result is that there is a short-circuit fault in the transmitting end part of the wireless power transmission system, resulting in no potential difference between points a and b, that is, U ab= 0. Under this short - circuit fault, the system is in a fourth - order damped oscillation state. After three oscillation periods, the transmitting end and the receiving end return to a stable state. The judgment result is sent to the controller through a D / A converter (D / A converter), and the controller switches the contact of the solid - state relay ① (Solid State Relay ①, SSR①) from position 1 to position 2, that is, by introducing another set of 220V mains power supply, an AC - DC - AC power converter and a compensation circuit part, which means adding a backup, finally eliminating the system fault, and then ensuring reliable and stable power supply to the electrical equipment.

[0070] 2. When the current I at the point detected by the Hall current sensor 1 (Hall current sensor 1) c = 0, that is, there is no current flowing through the branch where point c is located. The collected data is converted by the A / D converter ② (A / D converter ②), and then transmitted to the digital signal processor (DSP). The digital signal processor (DSP) compares the received value with the preset current value I at this point during the normal operation of the system inside it cs . The judgment result is that there is an open - circuit fault at the transmitting end of the wireless power transfer system, resulting in no current flowing through the branch where point c is located, that is, I c = 0. Under this open - circuit fault, the system is in a second - order damped oscillation state. After two oscillation periods, the current value at the receiving end of the coupling coil will be zero. The judgment result is sent to the controller through a D / A converter (D / A converter), and the controller switches the contact of the solid - state relay ① (Solid State Relay ①, SSR①) from position 1 to position 2, that is, by introducing another set of 220V mains power supply, an AC - DC - AC power converter and a compensation circuit part, which means adding a backup, finally eliminating the system fault, and then ensuring reliable and stable power supply to the electrical equipment.

[0071] 3. When the Hall voltage sensor 2 (Hall Voltage Sensor 1) detects that there is no potential difference between points d and e, that is, U de = 0, the collected data is converted by the A / D converter ③ (A / D converter ③), and then transmitted to the digital signal processor (DSP). The digital signal processor (DSP) compares the received value with the preset voltage value U between points d and e during the normal operation of the system inside it des . The judgment result is that there is a short - circuit fault in the receiving - end part of the wireless power transfer system, resulting in no potential difference between points d and e, that is, U de= 0. Under this short - circuit fault, the system is in a fourth - order damped oscillation state, and at this time, the system will exhibit a detuning phenomenon. After seven detuning periods, the transmitting end and the receiving end return to a stable state, and during the dynamic process, an overshoot phenomenon will occur, with the current amplitude being approximately three times that during steady - state operation. The judgment result is sent to the controller through a D / A converter (D / A converter). The controller switches the contact of the solid - state relay ② (Solid State Relay ②, SSR ②) from position 3 to position 4, that is, by introducing a compensation circuit and the power - conversion part, which means increasing the backup, finally eliminating the system fault, and thus ensuring reliable and stable power supply to the electrical equipment.

[0072] 4. When the current I at the point detected by the Hall current sensor 2 (Hall Current Sensor 2) f = 0, that is, no current flows through the branch where point f is located. The collected data is converted by the A / D converter ④ (A / D converter ④) and then transmitted to the digital signal processor (DSP); the digital signal processor (DSP) compares the received value with the pre - set current value I at this point during normal system operation inside it fs and the judgment result is: there is an open - circuit fault in the receiving - end part of this wireless power - transmission system, resulting in no current flowing through the branch where point f is located, that is, I f = 0. Under this open - circuit fault, the system is in a second - order damped oscillation state. After twenty oscillation periods, the system will return to a stable state, and at this time, the current will reach its maximum value, which is approximately four times the original steady - state operation current value. The judgment result is sent to the controller through a D / A converter (D / A converter). The controller switches the contact of the solid - state relay ② (Solid State Relay ②, SSR ②) from position 3 to position 4, that is, by introducing a compensation circuit and the power - conversion part, which means increasing the backup, finally eliminating the system fault, and thus ensuring reliable and stable power supply to the electrical equipment.

[0073] Based on the traditional wireless power - transmission system, on the basis of realizing safe, reliable, and stable power transmission, this invention proposes a fault - diagnosis and processing method for the possible faults that may occur during the operation of this wireless power - transmission system, thus ensuring the power - supply reliability and operation stability of this power - transmission system.

[0074] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in whole or in part in the form of a computer program product, the computer program product includes one or more computer instructions. When the computer program instructions are loaded or executed on a computer, the processes or functions described in the embodiments of the present invention are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more integrated available media. The available medium may be a magnetic medium (such as a floppy disk, hard disk, magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

[0075] As described above, the specific embodiments of the present invention are only described, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be covered by the protection scope of the present invention.

Claims

1. A method for fault diagnosis and processing of a wireless power transmission system, characterized in that, Use corresponding sensors to collect electrical quantities at specific positions in the energy transmission system in real time, and transmit the electrical quantities to the digital signal processor DSP through a conversion circuit. The digital signal processor DSP judges the transmitted data; if the judgment result is that there is a fault in the system, the result is transmitted to the controller through the conversion circuit, and the controller implements fault handling measures according to the fault type; The physical positions of a, b, and c are at the grid voltage input end of the transmitting end module of the wireless energy transmission system. Point a is connected to the live wire, point b is connected to the neutral wire, and the Hall voltage sensor is connected between a and b to measure the grid voltage Uab between points a and b. The Hall current sensor is connected to point c to measure the current input to the wireless energy transmission system; the physical positions of d, e, and f are at the output end of the receiving end module of the wireless energy transmission system. Point d is connected to the positive output terminal, point e is connected to the negative output terminal, the Hall voltage sensor is connected between d and e to measure the output voltage Ude between points d and e, and the Hall current sensor is connected to point f to measure the current output by the wireless energy transmission system; The fault diagnosis and processing method of the wireless power transmission system includes the following steps: Step 1, when the Hall voltage sensor 1 collects that there is no potential difference between points a and b, i.e., U ab = 0, the collected data is converted by the A / D converter ① and then transmitted to the digital signal processor DSP; the digital signal processor DSP internally compares the received value with the pre-set voltage value U abs between points a and b during normal system operation and obtains a judgment result; Step 2, when the current I at the detection point of the Hall current sensor 1 c = 0, it means that there is no current flowing through the branch where point c is located. The collected data is converted by the A / D converter ② and then transmitted to the digital signal processor DSP; the digital signal processor DSP internally compares the received value with the preset current value I cs during normal system operation and obtains a judgment result; Step 3, when the Hall voltage sensor 2 collects that there is no potential difference between points d and e, i.e., U de = 0, the collected data is converted by the A / D converter ③ and then transmitted to the digital signal processor DSP; the digital signal processor DSP internally compares the received value with the pre-set voltage value U des between points d and e during normal operation of the system and obtains a judgment result; Step 4, when the current I at the detection point of the Hall current sensor 2 f = 0, it means that there is no current flowing through the branch where the f point is located. The collected data is converted by the A / D converter ④ and then transmitted to the digital signal processor DSP; the digital signal processor DSP internally compares the received value with the preset current value I fs during normal system operation and obtains a judgment result; In the first step, there is a short - circuit fault in the transmitting - end part of the wireless power transfer system, resulting in no potential difference between points a and b, which is U ab = 0; under the short - circuit fault, the system is in a fourth - order damped oscillation state. After three oscillation periods, the transmitting end and the receiving end can return to the stable state; the judgment result is sent to the controller through the D / A converter. The controller switches the contact of solid - state relay ① from position 1 to position 2, and by introducing another set of 220V mains power supply, AC - DC - AC power converter and compensation circuit part, the backup is increased.

2. The method for fault diagnosis and handling of a wireless power transmission system according to claim 1, wherein, The judgment result in the second step is that there is an open - circuit fault in the transmitting - end part of the wireless power transfer system, so that no current flows through the branch where point c is located, and \(I_{ c}=0\); under the open - circuit fault, this system is in a second - order damped oscillation state; c = 0; Under the open - circuit fault, this system is in a second - order damped oscillation state; After two oscillation periods, the current value at the receiving end of the coupling coil will be zero; the judgment result is sent to the controller through the D / A converter, and the controller switches the contact of the solid state relay ① from position 1 to position 2, and increases the backup by introducing another set of 220V mains power supply, AC-DC-AC power converter and compensation circuit part.

3. The method for fault diagnosis and processing of a wireless power transmission system according to claim 1, wherein, The judgment result in step 3 is that there is a short - circuit fault in the receiving - end part of the wireless power transfer system, so that there is no potential difference between points d and e, and it is U de = 0; Under this short - circuit fault, the system is in a fourth - order damped oscillation state, and at this time, the system will show a detuning phenomenon. After seven detuning periods, first, the receiving end returns to a stable state, and during the dynamic process, an overshoot phenomenon that is three times the current amplitude during steady - state operation occurs; The judgment result is sent to the controller through a D / A converter, and the controller switches the contacts of the solid - state relay ②, Solid State Relay ②, SSR② from position 3 to position 4 to add a backup by introducing another set of compensation circuits and the power conversion part; The judgment result in step 4 is that there is an open - circuit fault in the receiving - end part of the wireless power transfer system, so that no current flows through the branch where point f is located, and I f = 0; under this open - circuit fault, the system is in a second - order damped oscillation state; After twenty oscillation periods, the system will return to a stable state. At this time, the current will reach the maximum value, and the maximum value is four times the current value during the original steady-state operation; the judgment result is sent to the controller through the D / A converter, and the controller switches the contact of the solid state relay ② from position 3 to position 4, that is, increases the backup by introducing another set of compensation circuit and power conversion part.

4. The method for fault diagnosis and handling of a wireless power transmission system according to claim 1, characterized in that, The fault diagnosis and processing method of the wireless power transmission system is powered by a 220V mains power supply. The output alternating current passes through an AC-DC-AC power converter to output high-frequency alternating current, and then through a compensation circuit, a transmitting coil, a receiving coil, and a compensation circuit to realize the wireless transmission of electrical energy from the transmitting end to the receiving end. The alternating current is subjected to corresponding power conversion by the power conversion device according to the load nature and finally powers the load; the Hall voltage or current sensor collects the electrical quantities at specific positions of the system in real time. The output of the Hall voltage or current sensor is converted by the A / D converter and then transmitted to the digital signal processor DSP. The digital signal processor compares the transmitted signal with the signal related to the normal operation of the system set in advance; if there is a difference between the two, the digital signal processor DSP outputs a corresponding signal, which is converted by the D / A converter and then implements corresponding control on the solid state relay through the controller to finally eliminate the fault.

5. A wireless power transmission system fault diagnosis and processing system for implementing the wireless power transmission system fault diagnosis and processing method according to any one of claims 1 to 4, characterized in that, The fault diagnosis and processing system of the wireless power transmission system includes: 220V mains power supply ①, 220V mains power supply ②: the power supply of the wireless power transmission system; AC-DC-AC power converters ① and ②: Since power electronic devices generate harmonics during operation and the magnetic field coupling between the transmitting coil and the receiving coil requires a high-frequency alternating magnetic field, it is necessary to convert the alternating current output from the 220V mains power supply through AC-DC-AC conversion; Compensation circuits ①, ②, ③, and ④: Form resonance compensation with the inductors in the transmitting coil and the receiving coil, aiming to improve the power factor of the system; Transmitting coil and receiving coil: Through the mutual inductance between the transmitting coil and the receiving coil, it aims to transfer the energy obtained by the transmitting end from the power supply to the receiving end, ultimately realizing power supply to the load, that is, realizing wireless power transmission; Power conversion ① and ②: The alternating current power obtained by the receiving end is subjected to corresponding power conversion according to the nature of the load, ultimately realizing power supply to the load; Hall voltage sensors ① and ②, Hall current sensors ① and ②: Sensor elements used for voltage and current detection at specific positions in fault diagnosis; A / D converters ①, ②, ③, and ④, D / A converter: Since the electrical signals output by the Hall voltage or current sensors are analog quantities, and these analog quantities will be sent to the digital signal processor DSP for processing, and the inputs and outputs of the digital signal processor DSP are all digital signals, the analog quantities output by the Hall voltage or current sensors should be converted into digital quantities through the A / D converters, and the digital quantities output by the digital signal processor DSP should be converted into analog quantities through the D / A converter; Digital signal processor DSP: A processor composed of large-scale or very large-scale integrated circuit chips used to complete digital signal processing tasks, used to process the voltage and current signals collected in real time by the Hall voltage or current sensors, and perform corresponding judgments, and finally transmit the output signals to the controller; Controller: Implement corresponding fault handling measures according to the output of the digital signal processor DSP; Solid state relays ① and ②: Non-contact switches composed of microelectronic circuits, discrete electronic devices, and power electronic power devices, realizing isolation between the control and the load end with isolation devices.

6. A computer device, characterized in that, The computer device includes a memory and a processor. When the computer program stored in the memory is executed by the processor, the processor executes the steps of the method for fault diagnosis and handling of a wireless power transmission system according to any one of claims 1 to 4.

7. A computer-readable storage medium storing a computer program, which when executed by a processor causes the processor to execute the steps of the method for fault diagnosis and handling of a wireless power transmission system according to any one of claims 1 to 4.

8. An information data processing terminal, characterized in that The information data processing terminal is used to implement the functions of the wireless power transmission system fault diagnosis and handling system according to claim 5.

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