Voltage control method and device for supercapacitor disconnection
Patent Information
- Application Number
- CN202510559154.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2026-11-03
AI Technical Summary
In the prior art, when a cascaded multilevel static synchronous condenser system starts up, the cascaded sub-module of the supercapacitor converter valve is disconnected, which leads to an increase in the equivalent impedance. This may cause overvoltage damage to the supercapacitor disconnected sub-module, affecting the stability and safety of the system.
The supercapacitor converter valve of the cascaded multilevel static synchronous condenser is pre-charged by a preset voltage limiting method. The energized data of the cascaded sub-modules is detected in real time, abnormal sub-modules are identified, and abnormal sub-modules are bypassed when the central control board starts. The charging voltage and starting resistor are controlled by a voltage limiting method to prevent overvoltage.
Accurately identify supercapacitor open circuit faults, prevent submodule voltage from rising sharply, avoid equipment damage, maintain system stability and reliability, ensure efficient operation of normal submodules, and extend equipment life.
Smart Images
Figure CN123034444A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of power electronics technology, for example to a voltage control method and apparatus for a supercapacitor disconnection. Background Technology
[0002] Due to the accelerated construction of new power systems, the power system is shifting towards large-scale, high-proportion renewable energy sources. The significant increase in the proportion of renewable energy has led to prominent issues with system stability, especially voltage stability, severely testing the fundamental strength of the power system and limiting its capacity to accommodate renewable energy. To improve this capacity, dynamic reactive power compensation measures are needed, such as conventional SVG (Static Var Generator) and SVC (Static Var Compensator). However, these devices suffer from problems such as large response delays, lack of inertia support, reactive power reversal during fault recovery, low damping, and susceptibility to worsening broadband oscillations. Traditional synchronous condensers, on the other hand, face issues such as high losses, high maintenance costs, and inflexible operation modes. Therefore, the use of static synchronous condensers is increasing. Static synchronous condensers employ grid-based control technology, improving the overcurrent capacity of switching devices and configuring supercapacitors as short-term energy storage devices. They can output a certain amount of active power to support the system frequency during power system faults, achieving the same external characteristics as traditional synchronous condensers while offering greater flexibility.
[0003] In related technologies, when a cascaded multilevel static synchronous condenser system is started, if the supercapacitor in one or more sub-modules of the cascaded sub-modules of the supercapacitor converter valve is disconnected, the equivalent impedance of the corresponding sub-module will increase. If the charging system and charging process are not limited, it will lead to overvoltage damage to the supercapacitor disconnected sub-module. Summary of the Invention
[0004] This application aims to provide a voltage control method and device for supercapacitor disconnection.
[0005] According to one aspect of this application, a voltage control method for supercapacitor disconnection is proposed, comprising: pre-charging the supercapacitor converter valve in a cascaded multilevel static synchronous condenser based on a preset voltage limiting method; during the pre-charging process, detecting the energized data of multiple cascaded sub-modules in the supercapacitor converter valve to determine whether the corresponding central control board is started based on the energized data; if the central control board is started, identifying the abnormal sub-module among the multiple cascaded sub-modules based on the energized data and a preset threshold, and bypassing the abnormal sub-module.
[0006] According to some embodiments, the cascaded multilevel static synchronous condenser includes a charging main circuit, and the above method further includes: obtaining the preset power supply properties and preset voltage limiting conditions of the charging main circuit; and determining the voltage limiting method according to the power supply properties and voltage limiting conditions.
[0007] According to some embodiments, the power supply characteristics include amplitude controllability; wherein, determining the voltage limiting method based on the power supply characteristics and preset voltage limiting conditions includes: when the power supply characteristics are amplitude controllable, determining the selection range of the charging voltage amplitude based on the voltage limiting conditions; and determining the charging voltage limiting method and selection range as the corresponding voltage limiting method.
[0008] According to some embodiments, based on a preset voltage limiting method, the supercapacitor converter valve in a cascaded multilevel static synchronous condenser is pre-charged, including: obtaining the required number of cascaded sub-modules; determining the target charging voltage amplitude from a selected range according to the required number of cascaded sub-modules and preset quantity determination conditions; and pre-charging the supercapacitor converter valve according to the target charging voltage amplitude.
[0009] According to some embodiments, the power supply characteristics include uncontrollable amplitude; wherein, determining the voltage limiting method based on the power supply characteristics and preset voltage limiting conditions includes: when the power supply characteristics are uncontrollable amplitude, determining the safe energizing time of multiple cascaded sub-modules after the corresponding supercapacitor is disconnected, based on the voltage limiting conditions; determining the resistance value of the starting resistor based on the safe energizing time and the preset power supply amplitude of the charging main circuit, so that the starting resistor can limit the voltage on the corresponding cascaded sub-module after the supercapacitor is disconnected; and determining the limiting method and resistance value of the starting resistor as the corresponding voltage limiting method.
[0010] According to some embodiments, when the central control board is started, based on the power-on data and preset thresholds, an abnormal sub-module among multiple cascaded sub-modules is identified and bypassed. This includes: when the central control board is started, identifying the abnormal sub-module based on the power-on data and preset thresholds; identifying the associated charging limiting module corresponding to the abnormal sub-module based on preset circuit component information corresponding to the power supply properties; obtaining the preset control mode of the associated charging limiting module; and adjusting the associated charging limiting module based on the preset control mode to bypass the abnormal sub-module.
[0011] According to some embodiments, during the pre-charging process, the energization data of multiple cascaded sub-modules in the supercapacitor converter valve is detected to determine whether the corresponding central control board is started based on the energization data. This includes: during the pre-charging process, if energization data sent by the central control board is received, it is determined that the central control board is started; if energization data is not received, it is determined that the central control board is not started.
[0012] According to one aspect of this application, a voltage control device for a supercapacitor disconnection is provided, comprising:
[0013] The pre-charge module is used to pre-charge the supercapacitor converter valve in the cascaded multilevel static synchronous condenser based on a preset voltage limiting method.
[0014] The start-up determination module is used to detect the energization data of multiple cascaded sub-modules in the supercapacitor converter valve during the pre-charging process, so as to determine whether the corresponding central control board should be started based on the energization data.
[0015] The bypass module is used to identify abnormal sub-modules among multiple cascaded sub-modules based on power-on data and preset thresholds when the central control board is started, and to bypass the abnormal sub-modules.
[0016] Optionally, the cascaded multilevel static synchronous condenser includes a charging main circuit, and the voltage control device for supercapacitor disconnection further includes a voltage limiting mode determination module for:
[0017] Obtain the preset power supply properties and preset voltage limiting conditions of the main charging circuit;
[0018] Determine the voltage limiting method based on the power supply characteristics and voltage limiting conditions.
[0019] Optionally, the power supply characteristics include amplitude controllability; the voltage limiting method determination module, based on the power supply characteristics and preset voltage limiting conditions, determines the voltage limiting method, specifically for:
[0020] When the power supply is of controllable amplitude, the range of the charging voltage amplitude is determined based on the voltage limiting condition.
[0021] The charging voltage limiting method and selection range are determined as the corresponding voltage limiting method.
[0022] Optionally, the pre-charge module is specifically used for:
[0023] Obtain the required number of cascaded sub-modules to be identified;
[0024] Based on the quantity requirements identified by the cascaded submodules and the preset quantity determination conditions, the target charging voltage amplitude is determined from the selected range.
[0025] The supercapacitor converter valve is pre-charged according to the target charging voltage amplitude.
[0026] Optionally, the power supply characteristics include uncontrollable amplitude; the voltage limiting method determination module, based on the power supply characteristics and preset voltage limiting conditions, determines the voltage limiting method, specifically for:
[0027] When the power supply is of uncontrollable amplitude, the safe energization time of multiple cascaded sub-modules after the corresponding supercapacitor is disconnected is determined according to the voltage limiting condition.
[0028] The resistance value of the starting resistor is determined based on the safe energization time and the preset power amplitude of the charging main circuit, so that the starting resistor can limit the voltage on the corresponding cascaded sub-module after the supercapacitor is disconnected.
[0029] The method and value of the starting resistor are determined as the corresponding voltage limiting method.
[0030] Optionally, the bypass module is specifically used for:
[0031] When the central control board is started, the abnormal sub-module is identified based on the power-on data and preset thresholds;
[0032] Based on the preset circuit component information corresponding to the power supply characteristics, determine the associated charging limiting module corresponding to the abnormal sub-module;
[0033] Obtain the preset control method of the associated charging limit module, and adjust the associated charging limit module based on the preset control method to bypass the abnormal sub-module.
[0034] Optionally, the startup determination module is specifically used for:
[0035] During the pre-charging process, upon receiving the energized data sent by the central control board, the central control board is activated.
[0036] If no live data is received, it is determined that the central control board has not started.
[0037] According to one aspect of this application, an electronic device is proposed, comprising: a processor; and a memory storing a computer program that, when executed by the processor, causes the processor to perform the voltage control method for supercapacitor disconnection as described above.
[0038] According to one aspect of this application, a non-transient computer-readable medium is proposed, on which readable instructions are stored, which, when executed by a processor, cause the processor to perform the voltage control method for disconnecting a supercapacitor as described above.
[0039] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application.
[0040] Beneficial effects:
[0041] Through the embodiments provided in this application, during the pre-charging phase, the energizing data of each stage of the supercapacitor converter valve submodules can be accurately monitored through a strictly controlled voltage limiting method, thereby accurately identifying a supercapacitor open-circuit fault in one or more submodules. Once a supercapacitor open-circuit fault is detected, the charge limiting control mechanism can be immediately activated. By promptly bypassing the abnormal submodule, the overall operational stability and reliability can be maintained. This prevents damage to other components caused by a sharp increase in submodule voltage due to a supercapacitor open circuit, avoids the negative impact of a faulty submodule on system performance, and ensures that other normal submodules can continue to work efficiently, thus maintaining the overall performance of the cascaded multilevel static synchronous condenser. Attached Figure Description
[0042] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings, without exceeding the scope of protection claimed by this application.
[0043] Figure 1 A flowchart of a voltage control method for supercapacitor disconnection provided in an embodiment of this application;
[0044] Figure 2 A partial circuit diagram of a cascaded multilevel static synchronous modulator provided in an embodiment of this application;
[0045] Figure 3 A partial circuit diagram of another cascaded multilevel static synchronous modulator provided in this application embodiment;
[0046] Figure 4 A block diagram of a voltage control device for supercapacitor disconnection provided in an embodiment of this application;
[0047] Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation
[0048] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.
[0049] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.
[0050] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.
[0051] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.
[0052] It should be understood that although the terms first, second, third, etc., may be used herein to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another. Therefore, the first component discussed below may be referred to as the second component without departing from the teachings of this application. As used herein, the term "and / or" includes all combinations of any one and more of the associated listed items.
[0053] For specific implementation details, please refer to the following examples.
[0054] Figure 1 This is a flowchart illustrating a voltage control method for supercapacitor disconnection provided in an embodiment of this application. The method of this embodiment can be applied to a detection and protection controller. Figure 1 As shown, the method includes steps S10, S11 and S12.
[0055] In step S10, the supercapacitor converter valve in the cascaded multilevel static synchronous condenser is pre-charged based on a preset voltage limiting method.
[0056] In this application, the cascaded multilevel static synchronous condenser can be configured with multiple cascaded sub-modules, each of which can be referenced as follows: Figure 2The power unit shown may include devices such as a supercapacitor, interface unit, central control board, transistor G1, transistor G2, capacitor C, and bypass switch. The supercapacitor commutation valve can be used to characterize the sum of multiple cascaded submodules. In some implementations, transistors G1 and G2 can be selected as IGBTs (Insulated Gate Bipolar Transistors) or IGCTs (Integrated Gate-Commutated Thyristors).
[0057] Voltage limiting methods can be preset to address voltage fluctuations under different scenarios when the supercapacitor is disconnected, thereby limiting the voltage. For the cascaded multilevel static synchronous condenser after voltage limiting, the supercapacitor converter valve is pre-charged.
[0058] In step S11, during the pre-charging process, the energized data of multiple cascaded sub-modules in the supercapacitor converter valve are detected to determine whether the corresponding central control board is started based on the energized data.
[0059] This application detects the energization status of multiple cascaded sub-modules in real time during the pre-charging process. In some implementations, energization data of the cascaded sub-modules, such as voltage and current values, can be collected in real time during pre-charging. Energy thresholds, such as voltage and current thresholds, can then be preset. By comparing the collected data with these preset thresholds, the energization status of the cascaded sub-modules can be determined. Different energization data can be preset to determine whether the central control board will be activated, thus matching the activation status of the central control board at the current moment.
[0060] In step S12, when the central control board is started, based on the power-on data and preset threshold, the abnormal sub-module among the multiple cascaded sub-modules is identified and the abnormal sub-module is bypassed.
[0061] In this application, the preset threshold can be used to characterize the boundary between a normally operating cascaded submodule and a cascaded submodule with supercapacitor wires. If the live data exceeds the preset threshold, the corresponding cascaded submodule can be determined to be an abnormal submodule, and the abnormal submodule can be bypassed.
[0062] During the pre-charging phase, this application employs a strictly controlled voltage limiting method to accurately monitor the charging data of each stage of the supercapacitor converter valve submodules, thereby precisely identifying supercapacitor open-circuit faults in one or more submodules. Once a supercapacitor open-circuit fault is detected, the charging limiting control mechanism is immediately activated. By promptly bypassing the abnormal submodule, the overall operational stability and reliability are maintained. This prevents damage to other components caused by a drastic voltage increase in the submodule due to a supercapacitor open circuit, avoids the negative impact of a faulty submodule on system performance, and ensures that other normal submodules can continue to operate efficiently, thus maintaining the overall performance of the cascaded multilevel static synchronous condenser.
[0063] According to some embodiments, the cascaded multilevel static synchronous condenser includes a charging main circuit. It is also possible to obtain the preset power supply characteristics and preset voltage limiting conditions of the charging main circuit; and determine the voltage limiting method based on the power supply characteristics and voltage limiting conditions.
[0064] In this application, the charging main circuit can be referenced as follows: Figure 2 The circuit shown consists of a voltage-controlled voltage source, a main switch, a connecting reactor, and any power unit. The power source in the main charging circuit can be a voltage or current source with controllable amplitude, or a voltage or current source with uncontrollable amplitude. Controllable and uncontrollable amplitudes represent two different power source characteristics. Different voltage limiting conditions can be preset to directly match the voltage limiting method used for the power source characteristics.
[0065] Based on the determined power supply characteristics and preset voltage limiting conditions, this application can select the most suitable voltage limiting method. This not only helps prevent equipment damage caused by excessive charging voltage but also ensures the safety of the supercapacitor converter valve and its cascaded submodules during charging. By precisely controlling the charging voltage, overvoltage situations can be avoided, thereby extending the service life of the equipment.
[0066] According to some embodiments, the power supply characteristics include amplitude controllability. When the power supply characteristics are amplitude controllable, the selection range of the charging voltage amplitude can be determined based on the voltage limiting condition; the charging voltage limiting method and selection range are determined as the corresponding voltage limiting method.
[0067] In this application, if the power supply is an AC or DC source with controllable amplitude, it means that the voltage of the power supply is adjustable, and the corresponding voltage limiting condition is set as follows:
[0068] U start src lmt
[0069] Among them, U start U is the starting operating voltage of the central control board in the cascaded submodule. lmt This represents the upper limit of the safe voltage for cascaded submodules. start and U lmt The operating parameters of the stationary synchronous camera can be preset. src The power supply voltage used to characterize the main charging circuit.
[0070] The selected range corresponds to U start To U lmt In this case, the voltage limiting method is to limit the charging voltage of the power supply, and the charging voltage is within the selected range.
[0071] When the power supply is amplitude-controllable, this application can accurately determine the range of charging voltage amplitude based on preset voltage limiting conditions. This prevents equipment damage caused by excessive charging voltage and ensures the safe operation of the supercapacitor converter valve and its cascaded submodules during charging. By strictly controlling the charging voltage, the risk of equipment failure caused by voltage fluctuations can be minimized. The amplitude-controllable power supply provides a wider range of charging voltage adjustment for cascaded multi-level static synchronous condensers. That is, this application can flexibly adjust the charging voltage under preset voltage limiting conditions according to actual needs to meet charging requirements in different scenarios. This flexibility not only improves the controllability of the charging process but also enables this application to better adapt to complex and ever-changing power grid environments.
[0072] According to some embodiments, the required number of cascaded submodules can be obtained; based on the required number of cascaded submodules and preset quantity determination conditions, the target charging voltage amplitude can be determined from the selected range; and the supercapacitor converter valve can be pre-charged according to the target charging voltage amplitude.
[0073] In this application, the required number of cascaded submodules to be identified can be pre-set, representing the number of cascaded submodules that need to be detected for disconnection of the supercapacitor. In some implementations, some cascaded submodules may have already been detected, or the detection may be targeted at certain cascaded submodules, or the power supply voltage may be insufficient to detect all cascaded submodules. Therefore, this requirement can be obtained in advance.
[0074] The preset quantity determination conditions can be:
[0075]
[0076] Here, `round()` is used to represent rounding down, that is, if... If the value is 3.7, it means that a maximum of 3 cascaded sub-modules of supercapacitors can be identified as having broken wires.
[0077] Given the required number of cascaded submodules, the quantity can be compared with U. start Substituting the above conditions, we get U srcThe possible values for the target charging voltage amplitude are defined, and this target charging voltage amplitude may be one or more. Then, the voltage of the control power supply is set to this target charging voltage amplitude to pre-charge the supercapacitor converter valve.
[0078] This application, by acquiring the required number of cascaded submodules, can adjust the charging strategy based on the actual number of connected submodules. This ensures that the charging process matches the actual configuration of the cascaded multi-level static synchronous condenser, avoiding unnecessary energy loss and thus improving charging efficiency. Based on preset quantity determination conditions and selection ranges, the target charging voltage amplitude can be accurately determined. This voltage value satisfies the charging requirements while ensuring the safe operation of the supercapacitor converter valve and its cascaded submodules. Strict control of the charging voltage effectively prevents overvoltage or overcurrent.
[0079] According to some embodiments, the power supply characteristics include uncontrollable amplitude. When the power supply characteristics are uncontrollable amplitude, the safe energization time of multiple cascaded sub-modules after the corresponding supercapacitor is disconnected can be determined based on voltage limiting conditions; the resistance value of the starting resistor is determined based on the safe energization time and the preset power supply amplitude of the charging main circuit, so that the starting resistor can limit the voltage on the corresponding cascaded sub-module after the supercapacitor is disconnected; the limiting method and resistance value of the starting resistor are determined as the corresponding voltage limiting method.
[0080] In this application, the situation where the amplitude is uncontrollable can be referred to [reference needed]. Figure 3 When using a voltage or current source with uncontrollable amplitude, the circuit includes a startup circuit, which consists of a startup switch KM and a startup resistor R. The power unit may include a supercapacitor, an interface unit, a capacitor C, a central control board, transistors G1, G2, G3, and G4, as well as a bypass switch. In some implementations, transistors G1, G2, G3, and G4 can be selected from IGBTs, IGCTs, etc.
[0081] When the power supply characteristic is that the amplitude is uncontrollable, the corresponding voltage limiting condition is:
[0082] T s >T start +T0
[0083] Among them, T s The safe charging time is used to characterize the charging voltage of a single cascaded submodule reaching U when the supercapacitor of the cascaded submodule is disconnected after the start of voltage-limited charging. lmt Time required. start This characterizes the charging voltage of a cascaded submodule when the supercapacitor of a single cascaded submodule is disconnected after the start of voltage-limited charging, reaching U. startThe required time. T0 is used to characterize the time from when the charging voltage of the cascaded submodule reaches the corresponding start-up operating voltage of the central control board until the central control board completes startup.
[0084] Based on the above conditions, the selection range for the safe energization time can be determined. Then, within this range, values can be randomly selected, and simulations can be performed with different starting resistor values under the current preset power supply amplitude and the randomly selected values. This will yield the most suitable relationship between the safe energization time and the starting resistor value, which can then be selected according to requirements. The starting resistor value and the safe energization time will be used as the voltage limiting method.
[0085] This application addresses the potential danger of supercapacitor disconnection by precisely calculating and pre-setting the starting resistor value. This effectively limits the voltage on cascaded sub-modules, preventing equipment damage or personal injury due to overvoltage, thus significantly improving the safety of the entire cascaded multilevel static synchronous condenser. Considering the uncontrollable nature of power supply amplitude, this application intelligently selects a voltage limiting method (i.e., starting resistor limiting) to minimize unnecessary energy loss and improve energy efficiency while ensuring safety.
[0086] According to some embodiments, when the central control board is started, the abnormal sub-module can be determined based on the power data and preset threshold; the associated charging limiting module corresponding to the abnormal sub-module can be determined based on the preset circuit component information corresponding to the power supply nature; the preset control mode of the associated charging limiting module can be obtained, and the associated charging limiting module can be adjusted based on the preset control mode to bypass the abnormal sub-module.
[0087] In this application, the charged data can be the voltage of the cascaded sub-module, and the preset threshold can be a voltage threshold. The detected voltage is compared with the voltage threshold. If the voltage exceeds the voltage threshold, the corresponding cascaded sub-module can be determined to be an abnormal sub-module.
[0088] Preset circuit component information can be used to represent the attributes of various components already configured in a cascaded multi-level static synchronous condenser. The associated charge limiting module can be pre-set, representing components that can disconnect abnormal sub-modules. (Reference) Figure 2 The associated charging limiting module may include transistor G1, transistor G2, capacitor C, and a bypass switch. (Reference) Figure 3 The associated charging limiting module may include transistor G1, transistor G2, transistor G3, transistor G4, capacitor C, and bypass switch. In some implementations, the associated charging limiting module may also be other power electronic devices.
[0089] The system retrieves the associated charging limit modules corresponding to the abnormal submodule under different pre-set power supply characteristics. The preset control methods for these modules differ; for example, the control method for a bypass switch is closed, while the control method for a transistor is open. The system then performs corresponding operations on the associated charging limit modules according to the preset control methods to bypass the abnormal submodule.
[0090] In some implementations, there are multiple associated charging restriction modules, which can be operated sequentially. Figure 2 For example, in bypass mode, transistor G2 can be turned on first, and then the bypass switch can be closed. Figure 3 For example, when bypassing, transistors G1+G3 or G2+G4 can be turned on first, and then the bypass switch can be closed.
[0091] This application, by monitoring live data in real time and comparing it with preset thresholds, can quickly identify abnormal submodules and take timely measures to bypass them, effectively preventing fault propagation and ensuring the safe operation of the entire cascaded multilevel static synchronous condenser. Timely bypassing of abnormal submodules reduces system instability factors and helps maintain the voltage and current stability of the cascaded multilevel static synchronous condenser.
[0092] According to some embodiments, during the pre-charging process, if the central control board receives power-on data sent by the central control board, it is determined that the central control board is started; if the power-on data is not received, it is determined that the central control board is not started.
[0093] In this application, the central control board can periodically send live data to the detection and protection controller (controller). When the controller receives the live data, it can be considered that the central control board has started. If no live data is received, it continues to send monitoring signals to the central control board.
[0094] This application can accurately determine whether the central control board has successfully started and entered the working state by detecting whether charged data is received, avoiding startup failure or instability of cascaded multilevel static synchronous condensers caused by misjudgment or omission. Detecting the central control board's startup status during the pre-charging stage ensures that the necessary monitoring and control capabilities are available before formal operation.
[0095] The following describes an apparatus embodiment of this application, which can be used to perform the method embodiment of this application. For details not disclosed in the apparatus embodiment of this application, please refer to the method embodiment of this application.
[0096] Figure 4 This is a block diagram of a voltage control device for supercapacitor disconnection provided in an embodiment of this application. Figure 4 As shown, the voltage control device 400 for supercapacitor disconnection includes a pre-charge module 401, a start-up determination module 402, and a bypass module 403.
[0097] The pre-charge module 401 is used to pre-charge the supercapacitor converter valve in the cascaded multilevel static synchronous condenser based on a preset voltage limiting method.
[0098] The start-up determination module 402 is used to detect the energized data of multiple cascaded sub-modules in the supercapacitor converter valve during the pre-charging process, so as to determine whether the corresponding central control board is started based on the energized data.
[0099] The bypass module 403 is used to identify the abnormal sub-module among multiple cascaded sub-modules based on the power-on data and preset thresholds when the central control board is started, and to bypass the abnormal sub-module.
[0100] Optionally, the cascaded multilevel static synchronous condenser includes a charging main circuit, and the voltage control device 400 for supercapacitor disconnection further includes a voltage limiting mode determination module 404, used for:
[0101] Obtain the preset power supply properties and preset voltage limiting conditions of the main charging circuit;
[0102] Determine the voltage limiting method based on the power supply characteristics and voltage limiting conditions.
[0103] Optionally, the power supply characteristics include controllable amplitude; the voltage limiting method determination module 404, when determining the voltage limiting method based on the power supply characteristics and preset voltage limiting conditions, is specifically used for:
[0104] When the power supply is of controllable amplitude, the range of the charging voltage amplitude is determined based on the voltage limiting condition.
[0105] The charging voltage limiting method and selection range are determined as the corresponding voltage limiting method.
[0106] Optionally, the pre-charge module 401 is used for:
[0107] Obtain the required number of cascaded sub-modules to be identified;
[0108] Based on the quantity requirements identified by the cascaded submodules and the preset quantity determination conditions, the target charging voltage amplitude is determined from the selected range.
[0109] The supercapacitor converter valve is pre-charged according to the target charging voltage amplitude.
[0110] Optionally, the power supply characteristics include uncontrollable amplitude; when the voltage limiting method determination module 404 determines the voltage limiting method based on the power supply characteristics and preset voltage limiting conditions, it is specifically used for:
[0111] When the power supply is of uncontrollable amplitude, the safe energization time of multiple cascaded sub-modules after the corresponding supercapacitor is disconnected is determined according to the voltage limiting condition.
[0112] The resistance value of the starting resistor is determined based on the safe energization time and the preset power amplitude of the charging main circuit, so that the starting resistor can limit the voltage on the corresponding cascaded sub-module after the supercapacitor is disconnected.
[0113] The method and value of the starting resistor are determined as the corresponding voltage limiting method.
[0114] Optionally, the bypass module 403 is used for:
[0115] When the central control board is started, the abnormal sub-module is identified based on the power-on data and preset thresholds;
[0116] Based on the preset circuit component information corresponding to the power supply characteristics, determine the associated charging limiting module corresponding to the abnormal sub-module;
[0117] Obtain the preset control method of the associated charging limit module, and adjust the associated charging limit module based on the preset control method to bypass the abnormal sub-module.
[0118] Optionally, the start-up determination module 402 is used for:
[0119] During the pre-charging process, upon receiving the energized data sent by the central control board, the central control board is activated.
[0120] If no live data is received, it is determined that the central control board has not started.
[0121] The device performs functions similar to those described above; other functions are described in the preceding descriptions and will not be repeated here.
[0122] Figure 5 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application, such as... Figure 5 As shown, the electronic device 500 of this embodiment may include a memory 501 and a processor 502.
[0123] The memory 501 stores a computer program, which, when executed by the processor 502, causes the processor 502 to perform the method described in the above embodiments.
[0124] The processor 502 and the memory 501 are connected, for example, via a bus.
[0125] Optionally, the electronic device 500 may also include a transceiver. It should be noted that in practical applications, the transceiver is not limited to one, and the structure of the electronic device 500 does not constitute a limitation on the embodiments of this application.
[0126] Processor 502 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. Processor 502 may also be a combination that implements computational functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.
[0127] A bus can include a pathway for transmitting information between the aforementioned components. The bus can be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, only one thick line is used in the diagram, but this does not imply that there is only one bus or one type of bus.
[0128] The memory 501 may be a ROM (Read Only Memory) or other type of static storage device capable of storing static information and instructions, RAM (Random Access Memory) or other type of dynamic storage device capable of storing information and instructions, or an EEPROM (Electrically Erasable Programmable Read Only Memory), CD-ROM (Compact Disc Read Only Memory) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited thereto.
[0129] The memory 501 is used to store application code that executes the solution of this application, and its execution is controlled by the processor 502. The processor 502 is used to execute the application code stored in the memory 501 to implement the content shown in the foregoing method embodiments.
[0130] Electronic devices include, but are not limited to: mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), and in-vehicle terminals (such as in-vehicle navigation terminals), as well as fixed terminals such as digital TVs and desktop computers. Servers can also be included. Figure 5 The electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.
[0131] The electronic device in this embodiment can be used to execute the method of any of the above embodiments, and its implementation principle and technical effect are similar, so they will not be described again here.
[0132] This application also provides a non-transitory computer-readable storage medium storing computer-readable instructions thereon, which, when executed by a processor, cause the processor to perform the method as described in the above embodiments.
[0133] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a non-transitory computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.
[0134] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. Furthermore, any changes or modifications made by those skilled in the art based on the ideas of this application, and on the specific implementation methods and application scope of this application, are all within the scope of protection of this application. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A voltage control method for supercapacitor disconnection, characterized in that, include: Based on a preset voltage limiting method, the supercapacitor converter valve in the cascaded multilevel static synchronous condenser is pre-charged. During the pre-charging process, the energization data of multiple cascaded sub-modules in the supercapacitor converter valve is detected to determine whether the corresponding central control board is started based on the energization data. When the central control board is started, based on the power-on data and a preset threshold, the abnormal sub-module among the multiple cascaded sub-modules is identified and the abnormal sub-module is bypassed.
2. The method according to claim 1, characterized in that, The cascaded multilevel static synchronous condenser includes a charging main circuit, and the method further includes: Obtain the preset power characteristics and preset voltage limiting conditions of the main charging circuit; The voltage limiting method is determined based on the power supply characteristics and the voltage limiting conditions.
3. The method according to claim 2, characterized in that, The power supply characteristics include controllable amplitude; The step of determining the voltage limiting method based on the power supply characteristics and preset voltage limiting conditions includes: When the power supply property is amplitude controllable, the range of the charging voltage amplitude is determined based on the voltage limiting condition; The charging voltage limiting method and the selected range are determined as the corresponding voltage limiting method.
4. The method according to claim 3, characterized in that, The pre-charging of the supercapacitor converter valve in the cascaded multilevel static synchronous condenser, based on a preset voltage limiting method, includes: Obtain the required number of cascaded sub-modules to be identified; Based on the quantity requirements identified by the cascaded submodules and the preset quantity determination conditions, the target charging voltage amplitude is determined from the selected range; The supercapacitor converter valve is pre-charged according to the target charging voltage amplitude.
5. The method according to claim 2, characterized in that, The power supply characteristics include uncontrollable amplitude; The step of determining the voltage limiting method based on the power supply characteristics and preset voltage limiting conditions includes: When the power supply is of uncontrollable amplitude, the safe energization time of the multiple cascaded sub-modules after the corresponding supercapacitor is disconnected is determined according to the voltage limiting condition. The resistance value of the starting resistor is determined based on the safe energization time and the preset power amplitude of the charging main circuit, so that the starting resistor can limit the voltage on the corresponding cascaded sub-module after the supercapacitor is disconnected. The method of limiting the starting resistor and the resistance value are determined as the corresponding voltage limiting method.
6. The method according to claim 2, characterized in that, When the central control board is started, based on the power-on data and a preset threshold, the abnormal submodule among the multiple cascaded submodules is determined and the abnormal submodule is bypassed, including: When the central control board is activated, the abnormal sub-module is determined based on the power-on data and the preset threshold. Based on the preset circuit component information corresponding to the power supply properties, determine the associated charging limiting module corresponding to the abnormal sub-module; Obtain the preset control mode of the associated charging limit module, and adjust the associated charging limit module based on the preset control mode to bypass the abnormal sub-module.
7. The method according to claim 1, characterized in that, During the pre-charging process, detecting the energization data of multiple cascaded sub-modules in the supercapacitor converter valve to determine whether the corresponding central control board should be activated based on the energization data includes: During the pre-charging process, upon receiving the charging data sent by the central control board, it is determined that the central control board is activated; If the energized data is not received, it is determined that the central control board is not started.
8. A voltage control device for a supercapacitor disconnection, characterized in that, include: The pre-charge module is used to pre-charge the supercapacitor converter valve in the cascaded multilevel static synchronous condenser based on a preset voltage limiting method. The start-up determination module is used to detect the energization data of multiple cascaded sub-modules in the supercapacitor converter valve during the pre-charging process, so as to determine whether the corresponding central control board is started based on the energization data. The bypass module is used to determine the abnormal sub-module among the multiple cascaded sub-modules based on the power-on data and a preset threshold when the central control board is started, and to bypass the abnormal sub-module.
9. An electronic device, characterized in that, include: processor; A memory storing a computer program that, when executed by the processor, causes the processor to perform the method as described in any one of claims 1-7.
10. A non-transitory computer-readable storage medium, characterized in that, It stores computer-readable instructions that, when executed by a processor, cause the processor to perform the method as described in any one of claims 1-7.