Control system, method, device and storage medium for sending-end flexible DC converter station

Abstract

The present application relates to a control system, method, device and storage medium for a sending-end flexible DC converter station. The system includes: a sending-end flexible DC converter station, a knife switch module and a receiving-end flexible DC converter station connected in sequence; the knife switch module is turned on when the charging of the receiving-end flexible DC converter station is completed, so that the sending-end flexible DC converter station and the receiving-end flexible DC converter station are connected; the receiving-end flexible DC converter station is used to output a charging voltage to the sending-end flexible DC converter station when the knife switch module is turned on, so as to charge the sending-end flexible DC converter station to the rated voltage, wherein the charging voltage gradually increases from an initial preset voltage, and the initial preset voltage is less than or equal to the safety voltage. The use of this application can improve the safety of the system.

Description

Technical Field

[0001] The present application relates to the field of electric power technology, and in particular to a control system, method, device and storage medium for a sending-end flexible direct current converter station. Background Art

[0002] Currently, the Flexible DC startup strategy involves closing the station's AC incoming line switch and using the station's AC power supply to simultaneously charge the module capacitors in both the receiving and sending Flexible DC converter stations. This simultaneous charging method results in high charging currents, making the system susceptible to high current shocks, which can damage the system and reduce safety. Summary of the Invention

[0003] Based on this, it is necessary to provide a control system, method, device and storage medium for a sending-end flexible DC converter station that can improve system safety in response to the above technical problems.

[0004] In a first aspect, the present application provides a control system for a sending-end flexible DC converter station, the system comprising:

[0005] The sending-end flexible DC converter station, switch module and receiving-end flexible DC converter station are connected in sequence;

[0006] The knife switch module is turned on when the receiving-end flexible DC converter station is fully charged, so that the sending-end flexible DC converter station and the receiving-end flexible DC converter station are connected;

[0007] The receiving-end flexible DC converter station is used to output a charging voltage to the sending-end flexible DC converter station when the knife switch module is turned on, so as to charge the sending-end flexible DC converter station to reach the rated voltage, wherein the charging voltage gradually increases from an initial preset voltage, and the initial preset voltage is less than or equal to the safety voltage.

[0008] In one embodiment, the system further comprises:

[0009] A sending-end AC subsystem, the sending-end AC subsystem being connected to the sending-end flexible DC converter station;

[0010] The sending-end flexible DC converter station is used to start the sending-end AC subsystem after the sending-end flexible DC converter station reaches the rated voltage.

[0011] In one embodiment, the receiving subsystem includes:

[0012] A receiving-end AC subsystem is connected to the receiving-end flexible DC converter station.

[0013] In a second aspect, the present application further provides a control method for a sending-end flexible DC converter station, the method comprising:

[0014] Charging the receiving-end flexible DC converter station;

[0015] When charging of the receiving-end flexible DC converter station is completed, controlling the switch module to be turned on;

[0016] Control the receiving-end flexible DC converter station to output a charging voltage to the sending-end flexible DC converter station to charge the sending-end flexible DC converter station to reach a rated voltage, wherein the charging voltage gradually increases from an initial preset voltage, and the initial preset voltage is less than or equal to a safety voltage.

[0017] In one embodiment, when charging of the receiving-end flexible DC converter station is completed, controlling the switch module to be turned on includes:

[0018] When charging of the receiving-end flexible DC converter station is completed, unlocking the receiving-end flexible DC converter station;

[0019] Control the knife switch module to be turned on.

[0020] In one embodiment, controlling the receiving-end flexible DC converter station to output a charging voltage to the sending-end flexible DC converter station to charge the sending-end flexible DC converter station to reach a rated voltage includes:

[0021] When the charging voltage reaches a preset voltage, obtaining the voltage of each capacitor in the sending-end flexible DC converter station;

[0022] If the voltage of each capacitor in the sending-end flexible DC converter station does not reach the rated capacitor voltage, control the capacitor groups in the sending-end flexible DC converter station to charge so that the sending-end flexible DC converter station reaches the rated voltage.

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

[0024] After the sending-end flexible DC converter station reaches the rated voltage, unlocking the sending-end flexible DC converter station;

[0025] The sending-end flexible DC converter station is controlled to discharge the sending-end AC subsystem to start the new energy generator set in the sending-end AC subsystem.

[0026] In a third aspect, the present application further provides a computer device. The computer device includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are performed:

[0027] Charging the receiving-end flexible DC converter station;

[0028] When charging of the receiving-end flexible DC converter station is completed, controlling the switch module to be turned on;

[0029] Control the receiving-end flexible DC converter station to output a charging voltage to the sending-end flexible DC converter station to charge the sending-end flexible DC converter station to reach a rated voltage, wherein the charging voltage gradually increases from an initial preset voltage, and the initial preset voltage is less than or equal to a safety voltage.

[0030] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the following steps:

[0031] Charging the receiving-end flexible DC converter station;

[0032] When charging of the receiving-end flexible DC converter station is completed, controlling the switch module to be turned on;

[0033] Control the receiving-end flexible DC converter station to output a charging voltage to the sending-end flexible DC converter station to charge the sending-end flexible DC converter station to reach a rated voltage, wherein the charging voltage gradually increases from an initial preset voltage, and the initial preset voltage is less than or equal to a safety voltage.

[0034] In a fifth aspect, the present application further provides a computer program product. The computer program product includes a computer program that, when executed by a processor, implements the following steps:

[0035] Charging the receiving-end flexible DC converter station;

[0036] When charging of the receiving-end flexible DC converter station is completed, controlling the switch module to be turned on;

[0037] Control the receiving-end flexible DC converter station to output a charging voltage to the sending-end flexible DC converter station to charge the sending-end flexible DC converter station to reach a rated voltage, wherein the charging voltage gradually increases from an initial preset voltage, and the initial preset voltage is less than or equal to a safety voltage.

[0038] The control system, method, equipment and storage medium of the above-mentioned sending-end flexible DC converter station, the system includes: a sending-end flexible DC converter station, a knife switch module and a receiving-end flexible DC converter station connected in sequence; the knife switch module is turned on when the charging of the receiving-end flexible DC converter station is completed, so that the sending-end flexible DC converter station and the receiving-end flexible DC converter station are connected; the receiving-end flexible DC converter station is used to output a charging voltage to the sending-end flexible DC converter station when the knife switch module is turned on, so as to charge the sending-end flexible DC converter station to the rated voltage, wherein the charging voltage gradually increases from an initial preset voltage, and the initial preset voltage is less than or equal to the safety voltage. Through the above method, the present application first charges the receiving-end flexible DC converter station, and then closes the knife switch module, and charges the sending-end flexible DC converter station through the receiving-end flexible DC converter station that has been charged. In this way, the receiving-end flexible DC converter station and the sending-end flexible DC converter station are charged in stages. Compared with the situation of charging both at the same time, the present application reduces the charging current in the entire system, thereby avoiding large currents causing damage to the system and improving safety. At the same time, when charging the sending-end flexible DC converter station through the receiving-end flexible DC converter station, the charging voltage starts from a voltage lower than the safe voltage, avoiding the instantaneous high voltage caused by closing the knife switch module when charging with a higher charging voltage, further ensuring the safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 Schematic diagram of the system structure of a control system of a sending-end flexible DC converter station in one embodiment;

[0040] Figure 2 Schematic diagram of a detailed module of a knife switch module in one embodiment;

[0041] Figure 3 Schematic diagram of a detailed module of a knife switch module in another embodiment;

[0042] Figure 4 This is a schematic diagram of the system structure of a control system of a sending-end flexible DC converter station in another embodiment;

[0043] Figure 5 This is a schematic diagram of the system structure of a control system of a sending-end flexible DC converter station in another embodiment;

[0044] Figure 6 1 is a flow chart of a control method for a sending-end flexible DC converter station in one embodiment;

[0045] Figure 7 A schematic diagram of a detailed process for controlling the receiving-end flexible DC converter station to output a charging voltage to the sending-end flexible DC converter station so as to charge the sending-end flexible DC converter station to reach a rated voltage in one embodiment;

[0046] Figure 8 2 is a flow chart of a control method for a sending-end flexible DC converter station in another embodiment;

[0047] Figure 9 FIG. 1 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0049] In one embodiment, Figure 1 As shown, a control system for a lost-end flexible DC converter station is provided, the system comprising:

[0050] The sending-end flexible DC converter station 100, the switch module 200 and the receiving-end flexible DC converter station 300 are connected in sequence.

[0051] In order to realize the staged charging of the sending-end flexible DC converter station 100 and the receiving-end flexible DC converter station 300, in this embodiment, at least one knife switch module 200 is provided between the sending-end flexible DC converter station 100 and the receiving-end flexible DC converter station 300. The knife switch module 200 can be turned on or off, thereby connecting or disconnecting the sending-end flexible DC converter station 100 and the receiving-end flexible DC converter station 300. As an embodiment, Figure 2 As shown, the knife switch module 200 may include: a first knife switch 210, a connecting line 220, and a second knife switch 230 connected in sequence. Specifically, one end of the first knife switch 210 is connected to the sending-end flexible DC converter station 100, and the other end is connected to one end of the second knife switch 230 through the connecting line 220. The other end of the second knife switch 230 is connected to the receiving-end flexible DC converter station 300. This facilitates circuit implementation in actual applications. As another embodiment, Figure 3 As shown, the switch module 200 may further include a third switch 240, which is connected between the sending-end flexible DC converter station 100 and the receiving-end flexible DC converter station 300. It is understood that the first switch 210, the second switch 230, and the third switch 240 may be of the same type or of different types.

[0052] The switch module 200 is turned on when the receiving-end flexible DC converter station 300 is fully charged, so that the sending-end flexible DC converter station 100 and the receiving-end flexible DC converter station 300 are connected.

[0053] Specifically, during the startup process, the receiving-end flexible DC converter station 300 is first charged via an external power source. After the receiving-end flexible DC converter station 300 is fully charged, the switch module 200 can be turned on manually, or the receiving-end flexible DC converter station 300 or another control module can control the switch module 200 to turn on. After the switch module 200 is turned on, the sending-end flexible DC converter station 100 and the receiving-end flexible DC converter station 300 are connected.

[0054] The receiving-end flexible DC converter station 300 is used to output a charging voltage to the sending-end flexible DC converter station 100 when the knife switch module 200 is turned on, so as to charge the sending-end flexible DC converter station 100 to reach the rated voltage, wherein the charging voltage gradually increases from an initial preset voltage, and the initial preset voltage is less than or equal to the safety voltage.

[0055] After the sending-end FDC converter station 100 and the receiving-end FDC converter station 300 are connected, the receiving-end FDC converter station 300 can output a charging voltage to the sending-end FDC converter station 100, thereby charging the sending-end FDC converter station 100 until the voltage of the sending-end FDC converter station 100 reaches the rated voltage. Once the voltage of the sending-end FDC converter station 100 reaches the rated voltage, it can serve as the starting power source for the sending-end AC station.

[0056] It should be noted that before charging is complete, both the sending-end Flexible DC converter station 100 and the receiving-end Flexible DC converter station 300 are in a locked state, meaning no load current flows through them. After charging is complete at the receiving-end Flexible DC converter station 300, the receiving-end Flexible DC converter station 300 is unlocked.

[0057] To ensure the safety of the control system, in this embodiment, during the charging process of the receiving-end flexible DC converter station 300 to the sending-end flexible DC converter station 100, the charging voltage output by the receiving-end flexible DC converter station 300 is gradually increased from an initial preset voltage, where the initial preset voltage is less than or equal to a safe voltage. A safe voltage refers to a voltage that is safe for the human body and the control system and will not cause harm or damage to the human body or the control system. For example, the charging voltage can be gradually increased from 0V. After the sending-end flexible DC converter station 100 is fully charged, the sending-end flexible DC converter station 100 is unlocked. The control system can then operate normally.

[0058] The control system of the above-mentioned sending-end flexible DC converter station: a sending-end flexible DC converter station, a knife switch module and a receiving-end flexible DC converter station connected in sequence; the knife switch module is turned on when the receiving-end flexible DC converter station is charged, so that the sending-end flexible DC converter station and the receiving-end flexible DC converter station are connected; the receiving-end flexible DC converter station is used to output a charging voltage to the sending-end flexible DC converter station when the knife switch module is turned on, so as to charge the sending-end flexible DC converter station to a rated voltage, wherein the charging voltage is gradually increased from an initial preset voltage, and the initial preset voltage is less than or equal to a safety voltage. Through the above-mentioned method, the present application first charges the receiving-end flexible DC converter station, and then closes the knife switch module, and charges the sending-end flexible DC converter station through the receiving-end flexible DC converter station that has been charged. In this way, the receiving-end flexible DC converter station and the sending-end flexible DC converter station are charged in stages. Compared with the situation where both are charged at the same time, the present application reduces the charging current in the entire system, thereby avoiding damage to the system caused by large current and improving safety. At the same time, when charging the sending-end flexible DC converter station 100 through the receiving-end flexible DC converter station 300, the charging voltage starts from a voltage lower than the safety voltage, avoiding the instantaneous high voltage caused by closing the knife switch module when charging with a higher charging voltage, further ensuring the safety of the system.

[0059] In one embodiment, based on the above embodiment, as Figure 4 As shown, the system also includes:

[0060] The sending-end AC subsystem 400 is connected to the sending-end flexible DC converter station 100;

[0061] The sending-end flexible DC converter station 100 is used to start the sending-end AC subsystem 400 after the sending-end flexible DC converter station 100 reaches the rated voltage.

[0062] In this embodiment, the system also includes a sending-end AC subsystem 400, which includes a new energy unit. Since the sending-end AC subsystem 400 is not equipped with a conventional power supply in traditional technology, the new energy unit requires the sending-end flexible DC converter station 100 to provide voltage before the new energy unit can be started.

[0063] Therefore, after the sending-end flexible DC converter station 100 reaches the rated voltage, the sending-end flexible DC converter station 100 is unlocked, so that the sending-end flexible DC converter station 100 provides power to the sending-end AC subsystem 400 and starts the sending-end AC subsystem 400.

[0064] Specifically, the sending-end flexible DC converter station includes multiple capacitors. During the charging process, the charging voltage output by the receiving-end flexible DC converter station gradually increases. After the charging voltage reaches a preset voltage, the voltage of each capacitor in the sending-end flexible DC converter station is obtained.

[0065] Determine whether the voltage of each capacitor in the sending-end flexible DC converter station has reached the corresponding rated capacitor voltage. If the voltage of each capacitor in the sending-end flexible DC converter station has not reached the rated capacitor voltage, control the capacitors in the sending-end flexible DC converter station to be charged in groups so that the voltage of each capacitor in the sending-end flexible DC converter station reaches the rated capacitor voltage. That is, control a portion of the capacitors in the sending-end flexible DC converter station to stop charging, while the remaining capacitors continue charging to quickly reach the rated capacitor voltage. Then, stop charging the capacitors that have reached the rated capacitor voltage, and continue charging the capacitors that have not reached the rated capacitor voltage, until the voltage of each capacitor in the sending-end flexible DC converter station reaches the rated capacitor voltage.

[0066] If the voltage of each capacitor in the sending-end flexible DC converter station reaches the rated capacitor voltage, that is, the sending-end flexible DC converter station 100 reaches the rated voltage, the sending-end flexible DC converter station is unlocked. After unlocking, the sending-end flexible DC converter station can provide the rated DC voltage to the sending-end AC subsystem 400, thereby starting the sending-end AC subsystem 400.

[0067] In one embodiment, based on the above embodiment, as Figure 5 As shown, the system also includes:

[0068] The receiving-end AC subsystem 500 is connected to the receiving-end flexible DC converter station 300 .

[0069] In this embodiment, the system also includes: a receiving-end AC subsystem 500. When the system is operating normally, the electric energy output by the sending-end AC subsystem 400 passes through the sending-end flexible DC converter station 100, the knife switch module 200 and the receiving-end flexible DC converter station 300 in sequence, and then is output to the corresponding electrical equipment through the receiving-end AC subsystem 500.

[0070] As an example, see Figure 5 , provides a control system for a sending-end flexible DC converter station capable of charging in stages. In order to realize the staged charging of the sending-end flexible DC converter station 100 and the receiving-end flexible DC converter station 300, in this embodiment, at least one knife switch module 200 is arranged between the sending-end flexible DC converter station 100 and the receiving-end flexible DC converter station 300. The knife switch module 200 can be turned on or off, thereby connecting or disconnecting the sending-end flexible DC converter station 100 and the receiving-end flexible DC converter station 300.

[0071] During startup, the receiving-end flexible DC converter station 300 is first charged via an external power source. After charging is complete, the switch module 200 can be manually turned on, or the receiving-end flexible DC converter station 300 or another control module can control the switch module 200 to turn on. After charging is complete, the receiving-end flexible DC converter station 300 is unlocked. After the switch module 200 is turned on, the sending-end flexible DC converter station 100 and the receiving-end flexible DC converter station 300 are connected.

[0072] After the sending-end flexible DC converter station 100 and the receiving-end flexible DC converter station 300 are connected, the receiving-end flexible DC converter station 300 can output a charging voltage to the sending-end flexible DC converter station 100, thereby charging the sending-end flexible DC converter station 100 until the voltage of the sending-end flexible DC converter station 100 reaches the rated voltage.

[0073] During the charging process of the receiving-end flexible DC converter station 300 to the sending-end flexible DC converter station 100, the charging voltage output by the receiving-end flexible DC converter station 300 gradually increases from an initial preset voltage, where the initial preset voltage is less than or equal to a safety voltage. A safety voltage is a voltage that is safe for the human body and the control system and will not cause harm or damage to the human body or the control system.

[0074] After the sending-end flexible DC converter station 100 is charged, the sending-end flexible DC converter station 100 is unlocked so that the sending-end flexible DC converter station 100 can serve as a DC power supply for the sending-end AC subsystem 400, providing power for the sending-end AC subsystem 400 to start the sending-end AC subsystem 400.

[0075] After the sending-end AC subsystem 400 is started, it outputs the corresponding working voltage, which passes through the sending-end flexible DC converter station 100, the knife switch module 200, the receiving-end flexible DC converter station 300 and the receiving-end AC subsystem 500 in sequence, and is finally output to the corresponding electrical equipment to achieve normal operation.

[0076] Based on the same inventive concept, embodiments of the present application also provide a control method for implementing the control system of the aforementioned sending-end flexible DC converter station. The solution provided by this control method is similar to the solution described in the aforementioned system. Therefore, the specific limitations in one or more control method embodiments provided below can be found in the above-mentioned limitations on the control system and will not be further elaborated here.

[0077] In one embodiment, Figure 6 As shown, a control method for a sending-end flexible DC converter station is provided, the method comprising:

[0078] Step S610: charging the receiving-end flexible DC converter station.

[0079] Specifically, the present application can be used for computers, or Figure 1-3 The receiving-end flexible DC converter station in the control system of the sending-end flexible DC converter station described in any of the corresponding embodiments is described in this application using a computer as an example. First, the computer can control the knife switch module to disconnect, thereby disconnecting the sending-end flexible DC converter station from the receiving-end flexible DC converter station. Then, an external power source is used to charge the receiving-end flexible DC converter station in the locked state to the rated voltage of the receiving-end flexible DC converter station. At this time, the charging of the receiving-end flexible DC converter station is completed.

[0080] Step S620: When the receiving-end flexible DC converter station completes charging, the switch module is controlled to be turned on.

[0081] When the charging of the receiving-end flexible DC converter station is completed, the knife switch module is controlled to be turned on, so that the sending-end flexible DC converter station and the receiving-end flexible DC converter station are turned on.

[0082] As an embodiment, when charging of the receiving-end flexible DC converter station is completed, controlling the switch module to be turned on includes:

[0083] When charging of the receiving-end flexible DC converter station is completed, unlocking the receiving-end flexible DC converter station;

[0084] Control the knife switch module to be turned on.

[0085] Specifically, the receiving-end flexible DC converter station is in a locked state before charging is completed, that is, there is no load current flowing through the receiving-end flexible DC converter station. After the receiving-end flexible DC converter station is charged, the receiving-end flexible DC converter station is unlocked, and the knife switch module is controlled to be turned on. It can be understood that the receiving-end flexible DC converter station can be unlocked first, and then the knife switch module can be controlled to be turned on; or the knife switch module can be controlled to be turned on first, and then the receiving-end flexible DC converter station can be unlocked, or the receiving-end flexible DC converter station can be unlocked and the knife switch module can be controlled to be turned on at the same time. That is, these two steps can be performed at the same time or any one of them can be selected to be performed first, and there is no limitation here.

[0086] Step S630: Control the receiving-end flexible DC converter station to output a charging voltage to the sending-end flexible DC converter station to charge the sending-end flexible DC converter station to a rated voltage, wherein the charging voltage is gradually increased from an initial preset voltage, and the initial preset voltage is less than or equal to a safety voltage.

[0087] After the sending-end flexible DC converter station and the receiving-end flexible DC converter station are connected, the receiving-end flexible DC converter station can output a charging voltage to the sending-end flexible DC converter station, thereby charging the sending-end flexible DC converter station until the voltage of the sending-end flexible DC converter station reaches the rated voltage. To ensure the safety of the control system, in this embodiment, during the process of charging the sending-end flexible DC converter station through the receiving-end flexible DC converter station, the charging voltage output by the receiving-end flexible DC converter station gradually increases from an initial preset voltage, where the initial preset voltage is less than or equal to a safe voltage. A safe voltage refers to a voltage that is safe for the human body and the control system and will not cause harm or damage to the human body and the control system. For example, the charging voltage can be gradually increased from 0V. After the sending-end flexible DC converter station is charged, the sending-end flexible DC converter station is unlocked. After that, the control system can operate normally.

[0088] The control method of the above-mentioned sending-end flexible DC converter station is to charge the receiving-end flexible DC converter station first, and then close the knife switch module, and charge the sending-end flexible DC converter station through the already charged receiving-end flexible DC converter station. In this way, the receiving-end flexible DC converter station and the sending-end flexible DC converter station are charged in stages. Compared with the situation of charging both at the same time, this application reduces the charging current in the entire system, thereby avoiding large currents causing damage to the system and improving safety. At the same time, when charging the sending-end flexible DC converter station 100 through the receiving-end flexible DC converter station 300, the charging voltage starts from a voltage lower than the safe voltage, avoiding the instantaneous high voltage caused by closing the knife switch module when charging with a higher charging voltage, further ensuring the safety of the system.

[0089] In one embodiment, based on the above embodiment, as Figure 5 As shown, controlling the receiving-end flexible DC converter station to output a charging voltage to the sending-end flexible DC converter station to charge the sending-end flexible DC converter station to reach a rated voltage includes:

[0090] Step S631: When the charging voltage reaches a preset voltage, the voltage of each capacitor in the sending-end flexible DC converter station is obtained;

[0091] Step S632: If the voltage of each capacitor in the sending-end flexible DC converter station does not reach the rated capacitor voltage, control each capacitor group in the sending-end flexible DC converter station to charge so that the sending-end flexible DC converter station reaches the rated voltage.

[0092] Specifically, the sending-end flexible DC converter station includes multiple capacitors. During the charging process, the charging voltage output by the receiving-end flexible DC converter station gradually increases. After the charging voltage reaches a preset voltage, the voltage of each capacitor in the sending-end flexible DC converter station is obtained.

[0093] If the voltage of each capacitor in the sending-end flexible DC converter station has not reached the rated capacitor voltage, the capacitors in the sending-end flexible DC converter station are controlled to be charged in groups so that the voltage of each capacitor in the sending-end flexible DC converter station reaches the rated capacitor voltage. In other words, charging of some capacitors in the sending-end flexible DC converter station is stopped, while charging of the remaining capacitors is continued to quickly reach the rated capacitor voltage. Then, charging of the capacitors that have reached the rated capacitor voltage is stopped, and charging of the capacitors that have not reached the rated capacitor voltage is continued, until the voltage of each capacitor in the sending-end flexible DC converter station reaches the rated capacitor voltage.

[0094] If the voltage of each capacitor in the sending-end flexible DC converter station reaches the rated capacitor voltage, that is, the sending-end flexible DC converter station reaches the rated voltage, the sending-end flexible DC converter station is unlocked.

[0095] In one embodiment, based on the above embodiment, as Figure 8 As shown, the method further includes:

[0096] Step S640: unlocking the sending-end flexible DC converter station after the sending-end flexible DC converter station reaches the rated voltage;

[0097] Step S650: Control the sending-end flexible DC converter station to discharge the sending-end AC subsystem to start the new energy generator set in the sending-end AC subsystem.

[0098] Specifically, because the sending-end AC subsystem in traditional technology lacks a conventional power source, the new energy generator requires voltage from the sending-end flexible DC converter station for startup. Once the sending-end flexible DC converter station reaches its rated voltage, it unlocks, allowing it to supply power to the sending-end AC subsystem, starting it.

[0099] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0100] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Figure 9As shown. The computer device includes a processor, a memory and a network interface connected through a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device can be used to store status data of the sending-end flexible DC converter station, the knife switch module and the receiving-end flexible DC converter station. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a control method for a sending-end flexible DC converter station is implemented.

[0101] Those skilled in the art will understand that Figure 9 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0102] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0103] Charging the receiving-end flexible DC converter station;

[0104] When charging of the receiving-end flexible DC converter station is completed, controlling the switch module to be turned on;

[0105] Control the receiving-end flexible DC converter station to output a charging voltage to the sending-end flexible DC converter station to charge the sending-end flexible DC converter station to reach a rated voltage, wherein the charging voltage gradually increases from an initial preset voltage, and the initial preset voltage is less than or equal to a safety voltage.

[0106] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0107] When charging of the receiving-end flexible DC converter station is completed, unlocking the receiving-end flexible DC converter station;

[0108] Control the knife switch module to be turned on.

[0109] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0110] When the charging voltage reaches a preset voltage, obtaining the voltage of each capacitor in the sending-end flexible DC converter station;

[0111] If the voltage of each capacitor in the sending-end flexible DC converter station does not reach the rated capacitor voltage, control the capacitor groups in the sending-end flexible DC converter station to charge so that the sending-end flexible DC converter station reaches the rated voltage.

[0112] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0113] After the sending-end flexible DC converter station reaches the rated voltage, unlocking the sending-end flexible DC converter station;

[0114] The sending-end flexible DC converter station is controlled to discharge the sending-end AC subsystem to start the new energy generator set in the sending-end AC subsystem.

[0115] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0116] Charging the receiving-end flexible DC converter station;

[0117] When charging of the receiving-end flexible DC converter station is completed, controlling the switch module to be turned on;

[0118] Control the receiving-end flexible DC converter station to output a charging voltage to the sending-end flexible DC converter station to charge the sending-end flexible DC converter station to reach a rated voltage, wherein the charging voltage gradually increases from an initial preset voltage, and the initial preset voltage is less than or equal to a safety voltage.

[0119] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0120] When charging of the receiving-end flexible DC converter station is completed, unlocking the receiving-end flexible DC converter station;

[0121] Control the knife switch module to be turned on.

[0122] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0123] When the charging voltage reaches a preset voltage, obtaining the voltage of each capacitor in the sending-end flexible DC converter station;

[0124] If the voltage of each capacitor in the sending-end flexible DC converter station does not reach the rated capacitor voltage, control the capacitor groups in the sending-end flexible DC converter station to charge so that the sending-end flexible DC converter station reaches the rated voltage.

[0125] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0126] After the sending-end flexible DC converter station reaches the rated voltage, unlocking the sending-end flexible DC converter station;

[0127] The sending-end flexible DC converter station is controlled to discharge the sending-end AC subsystem to start the new energy generator set in the sending-end AC subsystem.

[0128] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0129] Charging the receiving-end flexible DC converter station;

[0130] When charging of the receiving-end flexible DC converter station is completed, controlling the switch module to be turned on;

[0131] Control the receiving-end flexible DC converter station to output a charging voltage to the sending-end flexible DC converter station to charge the sending-end flexible DC converter station to reach a rated voltage, wherein the charging voltage gradually increases from an initial preset voltage, and the initial preset voltage is less than or equal to a safety voltage.

[0132] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0133] When charging of the receiving-end flexible DC converter station is completed, unlocking the receiving-end flexible DC converter station;

[0134] Control the knife switch module to be turned on.

[0135] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0136] When the charging voltage reaches a preset voltage, obtaining the voltage of each capacitor in the sending-end flexible DC converter station;

[0137] If the voltage of each capacitor in the sending-end flexible DC converter station does not reach the rated capacitor voltage, control the capacitor groups in the sending-end flexible DC converter station to charge so that the sending-end flexible DC converter station reaches the rated voltage.

[0138] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0139] After the sending-end flexible DC converter station reaches the rated voltage, unlocking the sending-end flexible DC converter station;

[0140] The sending-end flexible DC converter station is controlled to discharge the sending-end AC subsystem to start the new energy generator set in the sending-end AC subsystem.

[0141] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processor involved in the various embodiments provided herein may be, but are not limited to, a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, and the like.

[0142] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0143] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A control system for a sending-end flexible DC converter station, characterized in that: The system comprises: The sending-end flexible DC converter station, switch module and receiving-end flexible DC converter station are connected in sequence; When the receiving-end flexible DC converter station is fully charged, the switch module is unlocked and then turned on, so that the sending-end flexible DC converter station and the receiving-end flexible DC converter station are turned on; The receiving-end flexible DC converter station is used to output a charging voltage to the sending-end flexible DC converter station when the knife switch module is turned on, and obtain the voltage of each capacitor in the sending-end flexible DC converter station when the charging voltage reaches a preset voltage; if the voltage of each capacitor in the sending-end flexible DC converter station does not reach the rated capacitor voltage, control the charging of each capacitor group in the sending-end flexible DC converter station to make the sending-end flexible DC converter station reach the rated voltage. After the voltage of the sending-end flexible DC converter station reaches the rated voltage, it serves as the starting power supply of the sending-end AC station, wherein the charging voltage gradually increases from an initial preset voltage, and the initial preset voltage is less than or equal to the safety voltage.

2. The system according to claim 1, wherein: The system further comprises: A sending-end AC subsystem, the sending-end AC subsystem being connected to the sending-end flexible DC converter station; The sending-end flexible DC converter station is used to start the sending-end AC subsystem after the sending-end flexible DC converter station reaches the rated voltage.

3. The system according to claim 2, characterized in that The receiving subsystem comprises: A receiving-end AC subsystem is connected to the receiving-end flexible DC converter station.

4. The system according to any one of claims 1 to 3, characterized in that: The knife switch module includes: a first knife switch, a connecting line, and a second knife switch connected in sequence, one end of the first knife switch is connected to the sending-end flexible DC converter station, and the other end is connected to one end of the second knife switch through the connecting line, and the other end of the second knife switch is connected to the receiving-end flexible DC converter station.

5. The system according to claim 4, characterized in that The knife switch module further includes: a third knife switch, which is connected between the sending-end flexible DC converter station and the receiving-end flexible DC converter station.

6. The system according to claim 5, characterized in that The first knife switch, the second knife switch and the third knife switch are knife switches of the same type, or knife switches of different types.

7. A control method for a sending-end flexible DC converter station, characterized in that: The method comprises: Charging the receiving-end flexible DC converter station; When the receiving-end flexible DC converter station is fully charged, unlocking the receiving-end flexible DC converter station and controlling the switch module to be turned on; controlling the receiving-end flexible DC converter station to output a charging voltage to the sending-end flexible DC converter station, and obtaining the voltage of each capacitor in the sending-end flexible DC converter station when the charging voltage reaches a preset voltage; if the voltage of each capacitor in the sending-end flexible DC converter station does not reach the rated capacitor voltage, controlling the capacitors in the sending-end flexible DC converter station to be grouped and charged so that the sending-end flexible DC converter station reaches the rated voltage, wherein the charging voltage is gradually increased from an initial preset voltage, and the initial preset voltage is less than or equal to the safety voltage; After the sending-end flexible DC converter station reaches the rated voltage, the sending-end flexible DC converter station is unlocked; and the sending-end flexible DC converter station is controlled to discharge the sending-end AC subsystem to start the new energy unit in the sending-end AC subsystem.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to claim 7 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to claim 7 are implemented.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to claim 7 are implemented.

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