A distributed AC energy dissipation device topology, control method and related equipment

Abstract

This application discloses a distributed AC energy dissipation device topology, control method, and related equipment. The method comprises two rectifier bridge arms consisting of four rectifier diodes, with an energy dissipation module connected between them. This module consists of a power switch, rectifier diodes, an energy dissipation resistor, a fast recovery diode, and a capacitor. An energy dissipation circuit is formed by the power switch and the energy dissipation resistor connected in series. A rectifier diode and a fast recovery diode are connected in parallel across the power switch and the energy dissipation resistor, respectively. By real-time monitoring of the bipolar flexible DC transmission system's information, the system determines whether a fault has occurred, potentially leading to a power surplus. The number of AC energy dissipation devices to be connected is calculated, and corresponding commands are generated to control the on / off state of the power switches in the AC energy dissipation devices, thus connecting and disconnecting the appropriate number of AC energy dissipation devices from the system. This application's embodiments can improve the control accuracy of energy dissipation and reduce impact. This application can be widely applied in the field of power system technology.

Description

Technical Field

[0001] This application relates to the field of power system technology, and in particular to a distributed AC energy consumption device topology, control method and related equipment. Background Technology

[0002] Large-scale renewable energy bases are located far from the main grid and load centers, forming a renewable energy island network. When the renewable energy system experiences disturbances, the power generation of renewable energy exceeds the power output of the energy transmission system, resulting in a power surplus. This power surplus can lead to overload in both the renewable energy system and the energy transmission system, causing widespread grid disconnection of renewable energy generator units. Traditional technologies use grouped thyristor-type AC energy dissipation devices to handle the power surplus, or series-connected fully controlled devices to handle the power surplus. However, these methods have poor control precision and can have a significant impact on renewable energy power generation systems. Summary of the Invention

[0003] The main objective of this application is to propose a distributed AC energy-consuming device topology, control method, and related equipment, which can improve the control accuracy of the energy-consuming device and reduce impact.

[0004] To achieve the above objectives, one aspect of this application proposes a distributed AC power consumption device topology, which includes a first rectifier diode, a second rectifier diode, a third rectifier diode, a fourth rectifier diode, and a power consumption module, wherein... The cathode of the first rectifier diode is connected to the first terminal of the energy-consuming module and the cathode of the third rectifier diode, respectively, and the anode of the first rectifier diode is connected to the cathode of the second rectifier diode and the first terminal of the energy-consuming valve power module, respectively. The anode of the second rectifier diode is connected to the second terminal of the energy-consuming module; The anode of the third rectifier diode is connected to the cathode of the fourth rectifier diode and the second terminal of the power dissipation valve module, respectively. The anode of the fourth rectifier diode is connected to the second terminal of the energy-consuming module.

[0005] In some embodiments, the energy-consuming module includes a power switch, a fifth rectifier diode, an energy-consuming resistor, a fast recovery diode, and a capacitor; wherein, The cathode of the fifth rectifier diode is connected to the collector of the power switch and the first terminal of the power consumption module, respectively, and the anode of the fifth rectifier diode is connected to the emitter of the power switch. The first end of the energy-consuming resistor is connected to the emitter of the power switch and the cathode of the fast recovery diode, respectively, and the second end of the energy-consuming resistor is connected to the anode of the fast recovery diode; The first end of the capacitor is connected to the collector of the power switch, and the second end of the capacitor is connected to the second end of the energy-consuming resistor.

[0006] In some embodiments, the power switch receives an energy-consuming input command, switches to the on state, connects the energy-consuming resistor to the current loop, and short-circuits the capacitor; the power switch receives an off command, switches to the off state, connects the capacitor to the current loop, and short-circuits the energy-consuming resistor.

[0007] To achieve the above objectives, another aspect of this application proposes a control method for a distributed AC energy consumption state topology, applied to the aforementioned device topology, the method comprising: Obtain current system information and analyze the current system information to determine the current system operating information; The system calculates based on the current system operating information and preset fault information, generates an energy consumption input command, controls the AC energy consumption device to consume energy according to the energy consumption input command, updates the current system information, and compares the updated current system information with the preset system information. If the updated current system information is successfully compared with the preset system information, an exit command is generated, and the AC energy-consuming device is deactivated from energy consumption according to the exit command. If the updated current system information fails to match the preset system information, the process returns to the step of calculating based on the current system operating information and preset fault information to generate an energy consumption input instruction.

[0008] In some embodiments, the step of calculating and generating an energy consumption input instruction based on the current system operating information and preset fault information specifically includes: The current system operation information is compared with the preset fault information to determine the current fault type; If the current fault type is the first type, the current system operation information is extracted to obtain the single-pole power value, and the power input is calculated based on the single-pole power value, the system operation information and the preset power threshold to generate the energy input instruction; wherein, the first type includes any one or more of the following: lockout, fault, AC overvoltage or DC overvoltage; Otherwise, return to the step of obtaining current system information, analyzing the current system information, and determining the current system operating information.

[0009] In some embodiments, the step of calculating the energy consumption input instruction based on the unipolar power value, the system operating information, and a preset power threshold specifically includes: The output state is determined by comparing the single-pole power value with the preset power threshold. If the output state is power unrestricted, the number of bipolar input modules is calculated based on the system operation information, and a bipolar input instruction is generated based on the number of input modules. The bipolar input instruction is then used as the energy consumption input instruction. If the output state is power-limited, the system bipolar is divided into healthy poles and faulty poles according to the output state; and single-pole processing is performed according to the healthy poles, faulty poles and the system operation information to generate the energy consumption input command.

[0010] In some embodiments, the step of performing single-pole processing based on the healthy pole, the faulty pole, and the system operation information to generate the energy consumption input instruction specifically includes: Based on the healthy electrode, the system operation information is extracted to determine the current rated power value of the healthy electrode and the bipolar power value, and the bipolar power value is compared with the current rated power value of the healthy electrode; If the bipolar power value is greater than the current healthy pole rated power value, the healthy pole is put into operation according to the system operation information to obtain the number of single poles put into operation, and a single pole put-in instruction is generated according to the number of single poles put into operation, and the single pole put-in instruction is used as the energy consumption input instruction. If the bipolar power value is less than or equal to the rated power value of the current healthy electrode, the system operation information is extracted based on the faulty electrode to obtain the current faulty electrode power value, and the healthy electrode is power-transferred based on the current faulty electrode power value.

[0011] In some embodiments, the method further includes: The system information is processed to extract a set of voltage measurement values; wherein the set of voltage measurement values ​​includes module voltage measurement values, AC voltage measurement values, and DC voltage measurement values. The error value set is determined by calculating the difference between the voltage measurement value set and the preset command value set; wherein, the preset command value set includes module voltage command value, AC voltage command value and DC voltage command value; A first input value set is determined by performing proportional-integral calculations based on the error value set and the voltage measurement value set; and a second input value is determined by calculating surplus power based on the system state information. The number of input modules is obtained by summing the first set of input values ​​and the second set of input values.

[0012] To achieve the above objectives, another aspect of this application provides an electronic device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the method described above.

[0013] To achieve the above objectives, another aspect of the embodiments of this application proposes a computer-readable storage medium storing a computer program that, when executed by a processor, implements the methods described above.

[0014] To achieve the above objectives, another aspect of the embodiments of this application proposes a computer program product, including a computer program that, when executed by a processor, implements the aforementioned method.

[0015] The embodiments of this application include at least the following beneficial effects: This application provides a distributed AC power consumption device topology, control method, electronic device, storage medium, and program product. The energy dissipation device topology consists of two rectifier bridge arms composed of four rectifier diodes, with an energy dissipation module connected between the two rectifier bridge arms. This module comprises a power switch, rectifier diodes, an energy dissipation resistor, a fast recovery diode, and a capacitor. The power switch and energy dissipation resistor form an energy dissipation circuit in series, with the rectifier diode and fast recovery diode connected in parallel across the power switch and energy dissipation resistor, respectively. By real-time monitoring of the bipolar flexible DC transmission system's information, the system can determine if a fault has occurred, potentially leading to a power surplus. The system calculates the number of AC energy dissipation devices to be activated, generates corresponding commands to control the power switches in the AC energy dissipation devices to turn on and off, and puts the appropriate number of AC energy dissipation devices into the system until power transmission is restored. The control system then gradually removes the activated AC energy dissipation devices from the system. By monitoring system information and determining the fault type of the power surplus, the system calculates the number of AC energy dissipation devices to be activated for energy dissipation, improving control accuracy. By calculating the number of activated devices for energy dissipation and gradually removing them after power transmission is restored, the system's impact is reduced. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the topology of a distributed AC power consumption device provided in an embodiment of this application; Figure 2 This is a schematic diagram of the energy-consuming module in a distributed AC energy-consuming device topology provided in an embodiment of this application; Figure 3 This is a schematic diagram of the current flow path when the power switch is turned on in a distributed AC energy consumption device topology provided in this application embodiment; Figure 4This is a schematic diagram of another current flow path when the power switch is turned on in a distributed AC energy consumption device topology provided in this application embodiment; Figure 5 This is a schematic diagram of the current flow path when the power switch is turned off in a distributed AC energy consumption device topology provided in an embodiment of this application; Figure 6 This is a schematic diagram of another current flow path in a distributed AC energy consumption device topology when the power switch is turned off, provided in an embodiment of this application. Figure 7 This is a flowchart of a control method for a distributed AC energy dissipation device topology provided in an embodiment of this application; Figure 8 yes Figure 1 The flowchart of step S702 in the process; Figure 9 yes Figure 1 The flowchart of step S802 in the process; Figure 10 yes Figure 3 The flowchart of step S903 in the process; Figure 11 This is a flowchart illustrating the input calculation process in a control method for a distributed AC energy-consuming device topology provided in this application embodiment; Figure 12 This is a flowchart of a specific embodiment provided in this application; Figure 13 This is a schematic diagram of a specific embodiment of the topology of a distributed AC power dissipation device provided in this application. Figure 14 This is a system wiring diagram of a specific embodiment of a distributed AC energy dissipation device topology provided in this application. Figure 15 This is a flowchart of the algorithm for calculating the input module in a specific embodiment provided in this application; Figure 16 This is a schematic diagram of the hardware structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit it. In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with those of this application; they are merely examples of apparatuses and methods consistent with some aspects of the embodiments of this application as detailed in the appended claims.

[0018] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various concepts, but unless otherwise stated, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another. For example, without departing from the scope of the embodiments of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the words “if,” “when,” or “in response to a determination” as used herein may be interpreted as “when…” or “when…” or “in response to a determination.”

[0019] As used in this application, the terms "at least one", "multiple", "each", "any", etc., "at least one" includes one, two or more, "multiple" includes two or more, "each" refers to each of the corresponding multiples, and "any" refers to any one of the multiples.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0021] In related technologies, large-scale renewable energy bases often present isolated renewable energy networks. These networks are connected to the main grid and load centers via corresponding DC transmission systems, typically using bipolar flexible DC transmission systems. Renewable energy generators output power through the sending end of the bipolar flexible DC transmission system, transmitting it to the main grid and load centers. However, when system disturbances cause the renewable energy generation power to exceed the transmission power of the bipolar flexible DC transmission system, a power surplus problem arises. This leads to faults such as overload of the bipolar converter or increased DC voltage in the bipolar flexible DC transmission system, ultimately causing the bipolar flexible DC transmission system to block the connection between the bipolar and renewable energy generators, resulting in widespread grid disconnection of renewable energy units. Existing technical solutions typically employ thyristor-type AC power dissipation devices or series-connected fully controlled devices to address the power surplus problem. When a power surplus is detected in the system, the thyristor-type AC power dissipation device or series-connected fully controlled device is activated to consume the excess power. However, since thyristor-type AC power dissipation devices are usually activated in groups, activating the entire group may result in excessive power, poor control accuracy, slow control response, and a significant impact on the system from switching the entire group, easily causing large fluctuations in the system's AC voltage. Series-connected fully controlled devices use centralized power dissipation resistors, and the impact on the system is still significant when switching them for power dissipation.

[0022] In view of this, this application provides a distributed AC energy dissipation device topology, control method, and related equipment. This scheme uses multiple series-connected energy dissipation valve power modules to form a distributed AC energy dissipation device. This AC energy dissipation device is placed on the AC bus at the sending end of the system, i.e., on the primary side of the transformer of the sending-end converter valve. Each power module consists of two rectifier bridge arms composed of four rectifier diodes, and an energy dissipation module is connected between the two rectifier bridge arms. This energy dissipation module consists of a power switch, rectifier diodes, an energy dissipation resistor, a fast recovery diode, and a capacitor. The power switch and energy dissipation resistor are connected in series to form an energy dissipation circuit, and a rectifier diode and a fast recovery diode are connected in parallel across the power switch and energy dissipation resistor respectively to provide a freewheeling circuit. A capacitor is connected in parallel across the energy dissipation circuit to stabilize the voltage of the energy dissipation module. The control system monitors the system signal of the bipolar flexible DC transmission system in real time. Information, including electrical parameters such as monitoring module voltage, system-sending AC voltage, and DC voltages at various levels, is collected to determine if a system fault has occurred, potentially leading to a power surplus problem. The system assesses the fault characteristics of the power surplus problem, calculates the number of modules to activate AC power-consuming devices, and generates corresponding commands to control the on / off state of the power switches in these devices. This activates the appropriate number of AC power-consuming devices to consume surplus power, suppressing overload or overvoltage issues until power transmission is restored. The control system then gradually removes the activated AC power-consuming devices from the system. By monitoring system information and determining the fault type of the power surplus, the system calculates the number of AC power-consuming devices to activate for energy consumption, improving control accuracy. Furthermore, by calculating the number of devices to consume power and gradually removing them after power transmission is restored, the system minimizes the impact on the system.

[0023] This application provides a control method for a distributed AC power-consuming device, relating to the field of information technology. The control method for a distributed AC power-consuming device provided in this application can be applied to a terminal, a server, or software running on a terminal or server. In some embodiments, the terminal can be a smartphone, tablet, laptop, desktop computer, smart speaker, smartwatch, or vehicle terminal, but is not limited thereto; the server can be configured as an independent physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms. The server can also be a node server in a blockchain network; the software can be an application implementing a control method for a distributed AC power-consuming device, but is not limited to the above forms.

[0024] This application can be used in a wide variety of general-purpose or special-purpose computer system environments or configurations. Examples include: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, and distributed computing environments including any of the above systems or devices. This application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc., that perform specific tasks or implement specific abstract data types. This application can also be practiced in distributed computing environments where tasks are performed by remote processing devices connected via a communication network. In distributed computing environments, program modules can reside in local and remote computer storage media, including storage devices.

[0025] Figure 1 This is a schematic diagram of a distributed AC power consumption device topology provided in an embodiment of this application. Figure 1 The distributed AC power consumption device topology includes a first rectifier diode, a second rectifier diode, a third rectifier diode, a fourth rectifier diode, and a power consumption module, wherein... The cathode of the first rectifier diode is connected to the first terminal of the energy-consuming module and the cathode of the third rectifier diode, respectively. The anode of the first rectifier diode is connected to the cathode of the second rectifier diode and the first terminal of the energy-consuming valve power module, respectively. The anode of the second rectifier diode is connected to the second terminal of the power consumption module; The anode of the third rectifier diode is connected to the cathode of the fourth rectifier diode and the second terminal of the power dissipation valve module, respectively. The anode of the fourth rectifier diode is connected to the second terminal of the power consumption module.

[0026] In some embodiments, a first rectifier diode D1 and a second rectifier diode D2 are connected in series, and a third rectifier diode D3 and a fourth rectifier diode D4 are connected in series. The cathode of the first rectifier diode D1 is connected to the cathode of the third rectifier diode D3, and the anode of the second rectifier diode D2 is connected to the anode of the fourth rectifier diode D4. The first terminal of the AC energy dissipation device is connected to the anode of the first rectifier diode D1, and the second terminal of the AC energy dissipation device is connected to the anode of the third rectifier diode D3. Current can enter the AC energy dissipation device from either the first or the second terminal. The rectifier diodes are used to rectify the AC power output from the new energy generator set into DC power, which is then transmitted to the flexible DC transmission system and transmitted to the main grid and load center. Energy dissipation modules are connected between the series rectifier circuits to form energy dissipation circuits, which transmit or dissipate the DC power converted by the rectifier diodes, maintain power transmission, or consume surplus power. In this embodiment, the energy dissipation module is connected in parallel across the first and second rectifier diodes connected in series. The cathode of the first rectifier diode is connected to the first terminal of the energy dissipation module, and the anode of the second rectifier diode is connected to the second terminal of the energy dissipation module.

[0027] Please see Figure 2 , Figure 2 This is a schematic diagram of the energy-consuming module in a distributed AC energy-consuming device topology provided in an embodiment of this application. Figure 2 The energy-consuming module includes a power switch, a fifth rectifier diode, an energy-consuming resistor, a fast recovery diode, and a capacitor; among them, The cathode of the fifth rectifier diode is connected to the collector of the power switch and the first terminal of the power consumption module, respectively, and the anode of the fifth rectifier diode is connected to the emitter of the power switch. The first end of the power-consuming resistor is connected to the emitter of the power switch and the cathode of the fast recovery diode, respectively, and the second end of the power-consuming resistor is connected to the anode of the fast recovery diode. The first terminal of the capacitor is connected to the collector of the power switch, and the second terminal of the capacitor is connected to the second terminal of the power-consuming resistor.

[0028] In some embodiments, a power switch controls the switching of the current in the energy-consuming branch of the energy-consuming module, and a rectifier diode D1 is connected between the collector and emitter of the power switch T1 to provide a path for the reverse high voltage generated when the power switch T1 switches from the on state to the off state, thus preventing damage to the power switch device. In this embodiment, the cathode of the rectifier diode is connected to the collector of the power switch T1, and the anode of the rectifier diode D1 is connected to the emitter of the power switch T1. The energy-consuming module uses a resistor to consume surplus power, so the energy-consuming resistor is connected in series with the power switch T1, that is, the first end of the energy-consuming resistor is connected to the emitter of the power switch T1. Since the power switch T1 controls the switching of the current in the energy-consuming branch, when the power switch T1 is turned off, the energy-consuming resistor will also generate a reverse high voltage. To avoid damage to the energy-consuming resistor caused by the reverse high voltage, a fast recovery diode Dd is connected across the energy-consuming resistor to provide a freewheeling circuit. The generated reverse high voltage is consumed through the freewheeling circuit, reducing damage to the energy-consuming resistor. A capacitor C is connected in parallel across the energy-consuming branch to stabilize the module voltage.

[0029] In some embodiments, please refer to Figures 3 to 6 The AC energy dissipation device controls the switching of the energy-dissipating resistor by turning the power switch on and off, thereby consuming the surplus power of the bipolar flexible DC transmission system. Since current can flow into and dissipate from both the first and second terminals of the AC energy dissipation device, the different current directions result in different current flow paths. When current flows into the AC energy dissipation device from the second terminal and out from the first terminal, the current flow path is as follows: Figure 3 As shown, at this time, the power switching device is turned on, and current flows in from the second terminal of the AC power consumption device. After being rectified into DC by the third rectifier diode, it flows through the power switch and the power consumption resistor for power dissipation, and then flows out from the first terminal of the AC power consumption device through the second rectifier diode. When the current flows in from the first terminal of the AC power consumption device and out from the second terminal, the current flow path is as follows: Figure 4 As shown, current flows into the first terminal of the AC energy dissipation device, is rectified by the first rectifier diode, passes through the conducting power switch, is consumed by the energy dissipation resistor, and then flows out from the second terminal of the AC energy dissipation device after being rectified by the fourth rectifier diode. When the power switch is turned off, the AC energy dissipation device disconnects the energy dissipation resistor from the power transmission system, but the current transmitted by the power transmission system still needs to flow through the AC energy dissipation device. When current flows into the first terminal of the AC energy dissipation device and out from the second terminal, the current flow path is as follows: Figure 5 As shown, at this time, the power switching device is turned off, shutting off the energy-consuming branch. Current flows in from the first terminal of the AC energy-consuming device, is rectified by the first rectifier diode, flows through the capacitor, is rectified by the fourth rectifier diode, and flows out from the second terminal of the AC energy-consuming device. When current flows in from the second terminal of the AC energy-consuming device and flows out from the first terminal, the current flow path is as follows: Figure 6 As shown, at this time, the power switching device is turned off, shutting off the energy-consuming branch. The current flows in from the second terminal of the AC energy-consuming device, is rectified by the third rectifier diode, is regulated by the capacitor, and is then rectified by the second rectifier diode before flowing out from the first terminal of the AC energy-consuming device.

[0030] Figure 7 This is an optional flowchart of a control method for a distributed AC energy-consuming state topology provided in an embodiment of this application. Figure 7 The method may include, but is not limited to, steps S701 to S704.

[0031] Step S701: Obtain current system information, analyze the current system information, and determine the current system operating information; Step S702: Calculate based on the current system operation information and preset fault information, generate an energy consumption input command, control the AC energy consumption device to consume energy according to the energy consumption input command, update the current system information, and compare the updated current system information with the preset system information. Step S703: If the updated current system information is successfully compared with the preset system information, an exit command is generated, and the AC energy-consuming device is deactivated from energy consumption according to the exit command. Step S704: If the updated current system information fails to match the preset system information, return to the previous step to calculate based on the current system operating information and the preset fault information to generate an energy consumption input instruction.

[0032] Steps S701 to S704, as illustrated in this embodiment, involve real-time monitoring of the system information of the bipolar flexible DC transmission system using a monitoring device. This includes monitoring the current system status, the AC voltage at the sending end of the system, and the DC voltage of each pole. By analyzing the monitored system information, the current operating information of the system is obtained. Based on this information, it is determined whether a fault has occurred in the system, or whether there are any abnormalities in the AC voltage at the sending end or the DC voltage of each pole. This leads to a determination of whether surplus power exists, and consequently, whether an AC energy-consuming device should be activated to consume the surplus power. In this embodiment, the system operating information obtained from the analysis is compared and calculated with preset fault information to determine when a corresponding fault occurs in the system, resulting in surplus power. The system determines the number of AC energy-consuming devices required and generates corresponding energy-consuming input commands. It then controls the corresponding number of AC energy-consuming devices to be put into the system to consume and absorb surplus power. The system monitors information in real time and analyzes this information to determine if the transmission system has eliminated the fault, consumed the surplus power, or restored normal transmission power. If the fault is eliminated or the transmission power is restored, the control system generates corresponding exit commands to gradually remove the AC energy-consuming devices from the transmission system. If the fault persists or the transmission power remains abnormal, the system is monitored in real time, and corresponding AC energy-consuming devices are put into operation to consume and absorb the surplus power.

[0033] Please see Figure 8 In some embodiments, step S702 may include, but is not limited to, steps S801 to S803: Step S801: Compare the current system operation information with the preset fault information to determine the current fault type; Step S802: If the current fault type is the first type, extract the current system operation information to obtain the single-pole power value, and perform input calculation based on the single-pole power value, system operation information and preset power threshold to generate an energy input command; wherein, the first type includes any one or more of the following: lockout, fault, AC overvoltage or DC overvoltage; Step S803: Otherwise, return to obtain current system information, analyze the current system information, and determine the current system operating information.

[0034] In step S801 of some embodiments, the system operation information obtained by analyzing the system information is compared with the preset system fault information to determine whether the power transmission system has the corresponding fault in the preset fault information, and then to determine whether the power transmission system has surplus power problem, or overvoltage problem caused by surplus power problem, such as AC voltage of the sending-end converter or DC voltage of the positive and negative poles of the bipolar flexible DC transmission system.

[0035] In step S802 of some embodiments, by comparison, the corresponding fault type in the preset fault information of the power transmission system is determined, such as the power transmission system causing single-pole blocking due to a fault, or the power transmission system causing surplus power problems due to a fault, or the AC voltage of the sending-end converter of the power transmission system experiencing overvoltage, or the DC voltage of each pole in the bipolar flexible DC transmission system experiencing overvoltage, thereby causing the power transmission system to experience surplus power problems; the control system extracts data from the analyzed system operation information, determines the single-pole power value of each pole in the power transmission system, analyzes and judges the power transmission system based on the single-pole power value, system operation information and preset power threshold, determines the AC energy consumption device that needs to be put into operation to consume energy, whether the overvoltage is suppressed by the single pole or the bipolar pole of the system, and calculates the corresponding number of devices to be put into operation, and then generates the corresponding energy consumption input command to control the AC energy consumption device.

[0036] In step S803 of some embodiments, if by comparison it is determined that the power transmission system is operating normally, or no preset fault information has occurred, such as single-pole blocking, single-pole fault in the system, AC voltage overvoltage of the sending-end converter, or DC voltage overvoltage of each pole of the power transmission system; the control system monitors the double-pole flexible DC power transmission system in real time through the monitoring device, analyzes the real-time monitored system information, determines the operating information of the power transmission system, and judges whether a corresponding fault has occurred, resulting in surplus power problem.

[0037] Please see Figure 9 In some embodiments, step S802 may include, but is not limited to, steps S901 to S903: Step S901: Compare the single-pole power value with the preset power threshold to determine the output state; Step S902: If the output status is power unrestricted, calculate the number of bipolar input modules based on the system operation information, generate a bipolar input instruction based on the number of input modules, and use the bipolar input instruction as an energy consumption input instruction. Step S903: If the output state is power limited, the system bipolar is divided according to the output state to obtain the healthy pole and the faulty pole; and single-pole processing is performed according to the healthy pole, the faulty pole and the system operation information to generate an energy consumption input command.

[0038] In step S901 of some embodiments, by comparing and determining that any of the preset fault information of the power transmission system has occurred, such as single pole blocking, single pole fault, AC voltage overvoltage at the sending end or DC voltage overvoltage at each pole, the control system extracts data from the system operation information to obtain the single pole power value of each pole of the power transmission system, and compares the single pole power value of each pole with the preset power threshold to determine whether the single pole power output is limited, and then determines whether to put the AC energy dissipation device into the bipolar system.

[0039] In step S902 of some embodiments, if it is determined by comparison that the system's unipolar power output is not limited, the control system extracts data based on the system operation information, determines the electrical information of the power transmission system, performs input calculation based on the electrical information, determines the number of AC energy-consuming devices to be input to the system's bipolar system, and generates a corresponding bipolar input instruction as an energy-consuming input instruction based on the calculated input quantity, and controls the corresponding number of AC energy-consuming devices to be input to the power transmission system to consume and absorb surplus power.

[0040] In step S903 of some embodiments, if it is determined by comparison that the power output of a single pole of the system is limited, the control system divides the positive and negative poles of the system according to the output power of the single pole, determines the faulty pole and the healthy pole, and extracts data from the system operation information to determine the output power of the two poles of the system before the fault. Based on the output power of the two poles of the system before the fault, the power of the healthy pole and the power of the faulty pole, it is further determined whether to put an AC energy dissipation device into the single pole of the system to absorb the surplus power.

[0041] Please see Figure 10 In some embodiments, step S903 may include, but is not limited to, steps S1001 to S1003: Step S1001: Extract data from the system operation information based on the healthy electrode to determine the current rated power value of the healthy electrode and the bipolar power value, and compare the bipolar power value with the current rated power value of the healthy electrode; Step S1002: If the bipolar power value is greater than the current rated power value of the healthy pole, calculate the number of poles to be put into operation based on the system operation information, and generate a pole input instruction based on the number of poles to be put into operation, and use the pole input instruction as an energy consumption input instruction. Step S1003: If the bipolar power value is less than or equal to the current rated power value of the healthy electrode, extract data from the system operation information based on the faulty electrode to obtain the current power value of the faulty electrode, and transfer power to the healthy electrode based on the current power value of the faulty electrode.

[0042] In step S1001 of some embodiments, the control system extracts system operation information based on the information of limited single-pole power output to obtain the rated power value corresponding to the healthy pole and the output power of the bipolar pole of the system before the power transmission system failure. The output power of the bipolar pole of the system before the failure is compared with the rated power value of the healthy pole to determine whether to activate the AC energy dissipation device to suppress overvoltage or consume surplus power of the bipolar pole of the system.

[0043] In step S1002 of some embodiments, by comparison, the control system determines that the output power of the bipolar system before the fault is greater than the rated power value of the healthy pole. This indicates that due to the fault or single-pole blockage of the faulty pole, the healthy pole is bearing the original output power of the bipolar system. In order to avoid the healthy pole being overloaded and thus blocked, resulting in a large-scale disconnection of the new energy units, the control system performs input calculation based on the electrical information of the power transmission system in the system operation information, determines the number of AC energy-consuming devices to be put into the healthy pole, and generates a corresponding single-pole input command based on the calculated number of single-pole inputs. The obtained single-pole input command is used as an energy-consuming input command to control the AC energy-consuming devices to be put into the power transmission system to consume the surplus power.

[0044] In step S1003 of some embodiments, by comparison, the control system determines that the output power of the bipolar system before the fault is less than or equal to the rated power value of the healthy pole, determines that the healthy pole can bear the output power of the faulty pole, the control system transfers the output power of the faulty pole to the healthy pole, and monitors the bipolar flexible DC transmission system in real time through a monitoring device, and analyzes the real-time monitored system information to determine the operating information of the transmission system.

[0045] Please see Figure 11 , Figure 11 This is an optional flowchart for input calculation in the control method of the distributed AC energy consumption state topology provided in the embodiments of this application, which may include, but is not limited to, steps S1101 to S1104: Step S1101: Extract system information data to obtain a voltage measurement value set; wherein, the voltage measurement value set includes module voltage measurement values, AC voltage measurement values ​​and DC voltage measurement values; Step S1102: Calculate the difference between the voltage measurement value set and the preset command value set to determine the error value set; wherein, the preset command value set includes module voltage command value, AC voltage command value and DC voltage command value; Step S1103: Perform proportional-integral calculations based on the error value set and the voltage measurement value set to determine the first input value set; and calculate the surplus power based on the system status information to determine the second input value. Step S1104: Summing the first input value set and the second input value set to obtain the number of input modules.

[0046] In step S1101 of some embodiments, the control system analyzes the system information, extracts the system status information therein, and extracts the AC and DC electrical quantities of the system from the system status information, including module voltage measurement values, AC voltage measurement values ​​and DC voltage measurement values. The control system calculates the surplus power based on the extracted electrical quantities, i.e. voltage measurement values, and calculates the number of AC energy-consuming devices put into operation.

[0047] In step S1102 of some embodiments, the control system determines the corresponding command value set in the system according to the type of the extracted voltage measurement value, including module voltage command value, AC voltage command value and DC voltage command value. Based on the corresponding command value and the measured voltage measurement value, error calculation is performed to determine the voltage error in the system, and then the surplus power is calculated.

[0048] In step S1103 of some embodiments, proportional-integral calculation is performed based on the calculated voltage error to determine the number of units to be put into operation corresponding to the surplus power in different stages, such as the number of units to be put into operation corresponding to the surplus power caused by DC voltage overvoltage in each pole of the transmission system, the number of units to be put into operation corresponding to the surplus power caused by AC voltage overvoltage in the sending-end converter, etc. In this embodiment, proportional-integral calculation is performed using a proportional-integral calculator, enabled by the measured voltage value, inputting the calculated voltage error, and setting the corresponding maximum and minimum values ​​for the number of units to be put into operation in the proportional-integral calculator, truncating the output number of units to be put into operation, and outputting the corresponding number of units to be put into operation.

[0049] In step S1104 of some embodiments, the control system sums the input quantities calculated from different voltage errors to obtain the total input quantity, and inputs the calculated total input quantity into the selection module. The selection module selects the corresponding number of AC energy-consuming devices from the distributed AC energy-consuming devices, and the pump generates the corresponding PWM signal as an enable signal to control the AC energy-consuming devices to be put into the power transmission system to absorb the surplus power.

[0050] The following is a detailed description and explanation of the solutions in the embodiments of the present invention, using specific application examples: Please see Figure 12 , Figure 12 This is a flowchart illustrating the topology and control method of a distributed AC energy dissipation device provided in this application in a specific embodiment. Before control is performed, a distributed AC energy dissipation device is configured on the primary side of the transformer of the sending-end converter valve in the bipolar flexible DC transmission system, such as... Figure 13 As shown; specifically, the wiring between the distributed AC energy dissipation device and the bipolar flexible DC transmission system is as follows. Figure 14As shown, in a specific embodiment, IGBTs / IGCTs are used as power switching devices, switching between on and off states under control commands output by the control module to control the AC energy-consuming device to connect to or disconnect from the transmission system. The control system monitors the system status, including the AC voltage at the sending end of the transmission system or the DC voltage of each pole, and determines whether there is a blockage, fault, or AC / DC overvoltage. If a blockage, fault, or AC / DC overvoltage is determined, it is determined whether the single-pole power output of the transmission system is limited; otherwise, the system status is continuously monitored. If it is determined that the single-pole power output of the system is limited, the bipolar power before the system fault is collected and compared with the rated power of the healthy pole of the system to determine whether to control the output power of the healthy pole to switch to the faulty pole with limited output power. When the bipolar power before the system fault is less than or equal to the rated power of the healthy pole of the system, the output power of the healthy pole to switch to the faulty pole with limited output power is controlled; otherwise, the healthy pole is allowed to continue to operate. The control module calculates the number of AC energy-consuming devices to be put into operation for each pole and controls the corresponding number of AC energy-consuming devices to be put into the system to absorb surplus power, so as to prioritize suppress overvoltage in the system and increase the power of the healthy pole. If the control module determines that the power output of the single pole of the system is not limited, it indicates that there is surplus power or overvoltage in the bipolar system. The control module calculates the number of AC energy-consuming devices to be put into operation for the bipolar system and controls the corresponding number of AC energy-consuming devices to be put into the transmission system so that the converter can suppress the overvoltage in the system. At the same time, the safety control system of the transmission system controls the generator set with faults to be disconnected, reduces the power at the sending end, eliminates the fault, restores power transmission, and the control system controls the AC energy-consuming devices put into operation to be gradually disconnected.

[0051] Meanwhile, when a non-local fault occurs in the transmission system, and the control module cannot quickly obtain the system status, it collects AC and DC electrical quantities within the system and, based on... Figure 15 The algorithm shown calculates surplus power, including the surplus power corresponding to the module voltage, the surplus power corresponding to the sending-end AC voltage, and the surplus power corresponding to the DC bus. This is the commanded value for AC voltage. This is the measured value of AC voltage. This is the commanded value for DC voltage. This is a measured value of DC voltage. This is the commanded value for the module voltage. S represents the measured value of the module voltage, and S represents the system status signal (including system lockout, pre-fault power, etc.). This represents the maximum number of modules that can be deployed. This represents the minimum number of modules to be deployed. The output command value is the number of modules to be put into operation; the final surplus power value is determined by summation calculation and converted into the total number of modules to be put into operation. The module selection unit generates a PWM signal to control the corresponding number of AC power-consuming modules to be put into the system.

[0052] The embodiments of this application include at least the following beneficial effects: This application provides a distributed AC power consumption device topology, control method, electronic device, storage medium, and program product. The energy dissipation device topology consists of two rectifier bridge arms composed of four rectifier diodes, with an energy dissipation module connected between the two rectifier bridge arms. This module comprises a power switch, rectifier diodes, an energy dissipation resistor, a fast recovery diode, and a capacitor. The power switch and energy dissipation resistor form an energy dissipation circuit in series, with the rectifier diode and fast recovery diode connected in parallel across the power switch and energy dissipation resistor, respectively. By real-time monitoring of the bipolar flexible DC transmission system's information, the system can determine if a fault has occurred, potentially leading to a power surplus. The system calculates the number of AC energy dissipation devices to be activated, generates corresponding commands to control the power switches in the AC energy dissipation devices to turn on and off, and puts the appropriate number of AC energy dissipation devices into the system until power transmission is restored. The control system then gradually removes the activated AC energy dissipation devices from the system. By monitoring system information and determining the fault type of the power surplus, the system calculates the number of AC energy dissipation devices to be activated for energy dissipation, improving control accuracy. By calculating the number of activated devices for energy dissipation and gradually removing them after power transmission is restored, the system's impact is reduced.

[0053] This application also provides an electronic device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the above-described method. This electronic device can be any smart terminal, including tablet computers, in-vehicle computers, etc.

[0054] It is understood that the content of the above method embodiments is applicable to this device embodiment. The specific functions implemented by this device embodiment are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0055] Please see Figure 16 , Figure 16 The hardware structure of an electronic device according to another embodiment is illustrated. The electronic device includes: The processor 1601 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this application. The memory 1602 can be implemented as a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 1602 can store the operating system and other applications. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 1602 and is called and executed by the processor 1601 using the methods described in the embodiments of this application. The input / output interface 1603 is used to implement information input and output; The communication interface 1604 is used to enable communication and interaction between this device and other devices. Communication can be achieved through wired means (such as USB, Ethernet cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.). Bus 1605 transmits information between various components of the device (e.g., processor 1601, memory 1602, input / output interface 1603, and communication interface 1604); The processor 1601, memory 1602, input / output interface 1603 and communication interface 1604 are connected to each other within the device via bus 1605.

[0056] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method.

[0057] It is understood that the content of the above method embodiments is applicable to this storage medium embodiment. The specific functions implemented in this storage medium embodiment are the same as those in the above method embodiments, and the beneficial effects achieved are also the same as those achieved in the above method embodiments.

[0058] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0059] It is understood that the content of the above method embodiments is applicable to the embodiments of this program product. The specific functions implemented by the embodiments of this program product are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0060] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0061] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0062] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0063] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0064] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0065] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0066] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0067] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0068] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0069] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0070] If the integrated unit is implemented as 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 solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing programs, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0071] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A distributed AC energy consumption device topology, characterized in that, The device topology includes a first rectifier diode, a second rectifier diode, a third rectifier diode, a fourth rectifier diode, and a power dissipation module, wherein, The cathode of the first rectifier diode is connected to the first terminal of the energy-consuming module and the cathode of the third rectifier diode, respectively, and the anode of the first rectifier diode is connected to the cathode of the second rectifier diode and the first terminal of the energy-consuming valve power module, respectively. The anode of the second rectifier diode is connected to the second terminal of the energy-consuming module; The anode of the third rectifier diode is connected to the cathode of the fourth rectifier diode and the second terminal of the power dissipation valve module, respectively. The anode of the fourth rectifier diode is connected to the second terminal of the energy-consuming module.

2. The device topology according to claim 1, characterized in that, The energy-consuming module includes a power switch, a fifth rectifier diode, an energy-consuming resistor, a fast recovery diode, and a capacitor; wherein... The cathode of the fifth rectifier diode is connected to the collector of the power switch and the first terminal of the power consumption module, respectively, and the anode of the fifth rectifier diode is connected to the emitter of the power switch. The first end of the energy-consuming resistor is connected to the emitter of the power switch and the cathode of the fast recovery diode, respectively, and the second end of the energy-consuming resistor is connected to the anode of the fast recovery diode; The first terminal of the capacitor is connected to the collector of the power switch, and the second terminal of the capacitor is connected to the second terminal of the energy-consuming resistor.

3. The device topology according to claim 2, characterized in that, The power switch receives an energy-consuming input command, switches to the on state, connects the energy-consuming resistor to the current loop, and short-circuits the capacitor; the power switch receives an off command, switches to the off state, connects the capacitor to the current loop, and short-circuits the energy-consuming resistor.

4. A control method for a distributed AC energy-consuming state topology, applied to the device topology according to any one of claims 1 to 3, characterized in that, The method includes: Obtain current system information and analyze the current system information to determine the current system operating information; The system calculates based on the current system operating information and preset fault information, generates an energy consumption input command, controls the AC energy consumption device to consume energy according to the energy consumption input command, updates the current system information, and compares the updated current system information with the preset system information. If the updated current system information is successfully compared with the preset system information, an exit command is generated, and the AC energy-consuming device is deactivated from energy consumption according to the exit command. If the updated current system information fails to match the preset system information, the process returns to the step of calculating based on the current system operating information and preset fault information to generate an energy consumption input instruction.

5. The method according to claim 4, characterized in that, The step of calculating and generating an energy consumption input instruction based on the current system operating information and preset fault information specifically includes: The current system operation information is compared with the preset fault information to determine the current fault type; If the current fault type is the first type, the current system operation information is extracted to obtain the single-pole power value, and the power input is calculated based on the single-pole power value, the system operation information and the preset power threshold to generate the energy input instruction; wherein, the first type includes any one or more of the following: lockout, fault, AC overvoltage or DC overvoltage; Otherwise, return to the step of obtaining current system information, analyzing the current system information, and determining the current system operating information.

6. The method according to claim 5, characterized in that, The step of calculating the energy input instruction based on the single-pole power value, the system operation information, and the preset power threshold specifically includes: The output state is determined by comparing the single-pole power value with the preset power threshold. If the output state is power unrestricted, the number of bipolar input modules is calculated based on the system operation information, and a bipolar input instruction is generated based on the number of input modules. The bipolar input instruction is then used as the energy consumption input instruction. If the output state is power-limited, the system bipolar is divided into healthy poles and faulty poles according to the output state; and single-pole processing is performed based on the healthy poles, the faulty poles and the system operation information to generate the energy consumption input command.

7. The method according to claim 6, characterized in that, The step of performing single-pole processing based on the healthy pole, the faulty pole, and the system operation information to generate the energy consumption input instruction specifically includes: Based on the healthy electrode, the system operation information is extracted to determine the current rated power value of the healthy electrode and the bipolar power value, and the bipolar power value is compared with the current rated power value of the healthy electrode; If the bipolar power value is greater than the current healthy pole rated power value, the healthy pole is put into operation according to the system operation information to obtain the number of single poles put into operation, and a single pole put-in instruction is generated according to the number of single poles put into operation, and the single pole put-in instruction is used as the energy consumption input instruction. If the bipolar power value is less than or equal to the rated power value of the current healthy electrode, the system operation information is extracted based on the faulty electrode to obtain the current faulty electrode power value, and the power transfer is performed on the healthy electrode based on the current faulty electrode power value.

8. The method according to claim 4, characterized in that, The method further includes: The system information is processed to extract a set of voltage measurement values; wherein the set of voltage measurement values ​​includes module voltage measurement values, AC voltage measurement values, and DC voltage measurement values. The error value set is determined by calculating the difference between the voltage measurement value set and the preset command value set; wherein, the preset command value set includes module voltage command value, AC voltage command value and DC voltage command value; A first input value set is determined by performing proportional-integral calculations based on the error value set and the voltage measurement value set; and a second input value is determined by calculating surplus power based on the system state information. The number of input modules is obtained by summing the first set of input values ​​and the second set of input values.

9. An electronic device, characterized in that, include: At least one processor; At least one memory for storing at least one program; When the at least one program is executed by the at least one processor, the at least one processor implements the method as described in any one of claims 4 to 8.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the method of any one of claims 4 to 8.

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