Optimization method and system for configuration of high-voltage cable shield protector based on twin simulation

Abstract

The application discloses a high-voltage cable sheath protector configuration optimization method and system based on twin simulation, relates to the technical field of high-voltage cables, and comprises the following steps: collecting high-voltage cable voltage environment characteristics, simulating voltage environment characteristics through twin simulation, extracting voltage impulse characteristics, combining preset protector configuration parameters, establishing a matching relationship set, and optimizing the matching relationship set through a protection quantization target to obtain an optimal protector configuration parameter strategy; and performing overvoltage simulation verification on the target configuration strategy through a twin simulation space to determine a final protector configuration scheme. The application solves the technical problem that the existing high-voltage cable sheath protector configuration method relies on experience and trial-and-error and is difficult to accurately match complex and changeable voltage environments, and the protection effect is unstable, and achieves the technical effects of simulating a voltage environment based on twin simulation, accurately optimizing protector configuration parameters, and improving the effectiveness and reliability of the protector under complex overvoltage conditions.

Description

Technical Field

[0001] This invention relates to the field of high-voltage cable technology, and specifically to a method and system for optimizing the configuration of high-voltage cable sheath protectors based on twin simulation. Background Technology

[0002] With the widespread use of high-voltage cables in power systems, cable sheath protectors play a crucial role in preventing damage from voltage surges such as overvoltage and lightning strikes. However, existing protector configuration methods typically rely on experience and experimentation, lacking systematic voltage environment analysis and failing to accurately address complex voltage surge scenarios. Furthermore, the voltage environment in power systems is extremely complex, with frequent voltage fluctuations, overvoltages, and harmonics; traditional configuration methods cannot fully consider the diversity and complexity of these voltage surges. Summary of the Invention

[0003] This application provides a method and system for optimizing the configuration of high-voltage cable sheath protectors based on twin simulation, which solves the technical problem that existing high-voltage cable sheath protector configuration methods rely on experience and trial and error, making it difficult to accurately match complex and variable voltage environments and resulting in unstable protection effects.

[0004] The first aspect of this application provides a method for optimizing the configuration of high-voltage cable sheath protectors based on twin simulation. The method includes: collecting voltage environment characteristics of the high-voltage cable; simulating the voltage environment characteristics in a twin simulation space; extracting voltage influence relationships with the high-voltage cable sheath protector as the target to obtain impulse electrical characteristics; matching the impulse electrical characteristics with preset protector configuration parameters to establish a matching relationship set; optimizing the matching relationship set through a set protection quantification target to search for a protector configuration parameter strategy that satisfies the protection quantification target or meets the search constraints, and using this strategy as the target configuration strategy; verifying the target configuration strategy through overvoltage simulation in the twin simulation space; and using the target configuration strategy that meets the verification results as the final protector configuration scheme.

[0005] A second aspect of this application provides a high-voltage cable sheath protector configuration optimization system based on twin simulation. The system includes: an environmental characteristic simulation module for collecting voltage environment characteristics of the high-voltage cable, simulating voltage environment characteristics through a twin simulation space, extracting voltage influence relationships with the high-voltage cable sheath protector as the target, and obtaining impulse electrical characteristics; a configuration parameter matching module for matching preset protector configuration parameters according to the impulse electrical characteristics to establish a matching relationship set; a configuration strategy optimization module for optimizing the matching relationship set through a set protection quantification target, searching for the protector configuration parameter strategy corresponding to the optimal quantification target that satisfies the protection quantification target or satisfies the search constraints, and using it as the target configuration strategy; and an overvoltage simulation verification module for performing overvoltage simulation verification on the target configuration strategy through the twin simulation space, and using the target configuration strategy that meets the verification results as the final protector configuration scheme.

[0006] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0007] This application provides a method and system for optimizing the configuration of high-voltage cable sheath protectors based on twin simulation, relating to the field of high-voltage cable technology. By combining twin simulation technology, it extracts voltage impulse characteristics based on the voltage environment features of high-voltage cables, and performs matching optimization through preset protector configuration parameters. It seeks the best configuration strategy by setting protection quantification targets, and verifies the optimized configuration scheme through simulation, ensuring the effectiveness and stability of the protector under complex voltage environments. This solves the technical problem that existing high-voltage cable sheath protector configuration methods rely on experience and trial and error, making it difficult to accurately match complex and variable voltage environments and resulting in unstable protection effects. It achieves the technical effect of accurately optimizing protector configuration parameters based on twin simulation of voltage environment, improving the effectiveness and reliability of protectors under complex overvoltage conditions. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 A schematic diagram of the configuration optimization method for high-voltage cable sheath protectors based on twin simulation provided in this application embodiment;

[0010] Figure 2 This is a schematic diagram of the configuration optimization system for high-voltage cable sheath protectors based on twin simulation provided in this application embodiment.

[0011] Figure labeling: Environmental characteristic simulation module 11, configuration parameter matching module 12, configuration strategy optimization module 13, overvoltage simulation verification module 14. Detailed Implementation

[0012] This application provides a method and system for optimizing the configuration of high-voltage cable sheath protectors based on twin simulation, which solves the technical problem that existing high-voltage cable sheath protector configuration methods rely on experience and trial and error, making it difficult to accurately match complex and variable voltage environments and resulting in unstable protection effects.

[0013] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0014] It should be noted that the terms "first," "second," etc., in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or server that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or modules not explicitly listed or inherent to such processes, methods, products, or devices.

[0015] Example 1, as Figure 1 As shown, this application provides a method for optimizing the configuration of high-voltage cable sheath protectors based on twin simulation. The method includes:

[0016] P10: Collect voltage environment characteristics of high-voltage cables, simulate voltage environment characteristics through twin simulation space, extract voltage influence relationship with high-voltage cable sheath protector as target, and obtain impulse electrical characteristics.

[0017] Furthermore, in this embodiment, step P10 also includes collecting the voltage environment characteristics of the high-voltage cable:

[0018] P11: Obtain the voltage characteristics of the target high-voltage cable's operating environment through historical data or sensor acquisition, including voltage range, voltage fluctuations, overvoltage events, and harmonic component data; P12: Extract the voltage impulse characteristics encountered by the cable sheath under various voltage conditions based on the voltage characteristics of the target high-voltage cable's operating environment; the voltage impulse characteristics include: instantaneous overvoltage, harmonic overvoltage, lightning overvoltage, and short-circuit overvoltage. P13: Combine the voltage characteristics and the corresponding voltage impulse characteristics to determine the voltage environment characteristics, which are used to describe the influence mode of voltage characteristics on the cable in the high-voltage cable's operating environment.

[0019] It should be understood that by collecting the voltage environment characteristics of high-voltage cables and simulating the voltage environment characteristics through a twin simulation space, the influence relationship between voltage and cable sheath protectors is extracted, and impulse electrical characteristics are obtained, with high-voltage cable sheath protectors as the target.

[0020] First, the voltage characteristics of the target high-voltage cable's operating environment are obtained through historical data or sensor acquisition. These voltage characteristics refer to various voltage-related parameters encountered by the high-voltage cable during actual operation, specifically including voltage range, voltage fluctuations, overvoltage events, and harmonic component data. Voltage range refers to the minimum and maximum voltage values ​​experienced by the cable during normal operation, reflecting the amplitude of voltage fluctuations during operation. Voltage fluctuations refer to the changes in voltage over a certain period, which may manifest as periodic fluctuations or occasional abnormal changes, significantly impacting cable operational safety. Overvoltage events refer to situations where the cable experiences voltages exceeding the normal operating range, typically caused by external factors such as lightning strikes or short-circuit faults, potentially leading to equipment damage or protector failure. Harmonic component data describes the distorted portion of the voltage waveform, usually generated by nonlinear loads. These distortions increase the burden on cable sheath protectors, affecting their protective performance. Therefore, by monitoring the cable's operating voltage and its changes in real time using sensors, combined with historical data, a comprehensive understanding of the voltage characteristics in the cable's operating environment can be achieved.

[0021] Next, based on the voltage characteristics of the target high-voltage cable's operating environment, the voltage impulse characteristics encountered by the cable sheath under various voltage environments are extracted. Voltage impulse characteristics refer to the various overvoltage conditions experienced by the cable sheath under different voltage environments, specifically including transient overvoltage, harmonic overvoltage, lightning overvoltage, and short-circuit overvoltage. Transient overvoltage is usually caused by sudden events such as lightning strikes, system faults, or switching operations. It causes the voltage to rapidly rise to several times the normal voltage within a very short time. Although the duration is short, its amplitude is large, causing significant damage to electrical equipment. Harmonic overvoltage is caused by voltage waveform distortion due to nonlinear loads in the power system. The amplitude of this overvoltage is usually small, but its long-term effects can significantly impact the cable sheath, potentially leading to problems such as aging of protectors and increased leakage current. Lightning overvoltage refers to power system voltage overvoltage caused by lightning strikes. It typically manifests as very high transient voltages. Although the duration of this type of overvoltage is short, its amplitude is very large, potentially causing damage or even malfunction of electrical equipment. Short-circuit overvoltage occurs when a short-circuit fault occurs in the power system, causing a sudden voltage surge and generating a strong current surge, which puts significant stress on cable sheath protectors. Therefore, by extracting the characteristics of different types of voltage surges, we can accurately understand the performance of the cable sheath under various overvoltage events, thus providing an important basis for subsequent protector configuration.

[0022] Finally, combining the aforementioned voltage characteristics and corresponding voltage surge characteristics, the voltage environment characteristics are determined, and a comprehensive model describing the impact of voltage characteristics on the cable sheath in the high-voltage cable's operating environment is established. Specifically, the voltage environment characteristics are not merely a simple summation of voltage range, fluctuations, and overvoltage events, but a comprehensive dataset containing multi-dimensional information such as voltage fluctuations, overvoltage events, and harmonic components. This information reveals the impact pattern of voltage on sheath protectors in the cable's environment. For example, in environments with high harmonic content and frequent overvoltage events, cable sheath protectors may be more prone to aging and damage, and environments with large voltage fluctuations may lead to frequent protector triggering. Therefore, comprehensively considering these voltage characteristics provides a more accurate design basis for protector configuration.

[0023] Furthermore, taking the high-voltage cable sheath protector as the target, voltage influence relationship is extracted to obtain impulse electrical characteristics. In this embodiment, step P10 further includes:

[0024] P14: The target high-voltage cable is simulated in a twin simulation space according to its voltage environment characteristics to reproduce the actual operating state of the high-voltage cable. The protector simulation module built into the twin simulation space is activated. The protector is used as the simulation target. According to the structural characteristics and working principle of the protector, the influence of the impulse voltage on the protector from input to output is simulated. The voltage impulse characteristics of the high-voltage cable sheath protector are extracted to obtain the impulse electrical characteristics.

[0025] Optionally, the voltage influence relationship of the high-voltage cable sheath protector can be further extracted, and the voltage impulse characteristics of the high-voltage cable and its sheath protector can be simulated and analyzed through twin simulation space.

[0026] First, the target high-voltage cable is simulated using a twin simulation space. The simulation process requires settings based on the actual voltage environment characteristics of the cable. Twin simulation technology combines the cable's operating state with voltage environment characteristics, accurately reproducing the cable's actual operation under different voltage environments. The core objective of this process is to establish a virtual model through simulation, in which voltage characteristics such as voltage fluctuations, overvoltage events, and harmonic components are fully considered, ensuring that the simulation results have practical significance and accuracy.

[0027] During the simulation, the twin simulation space activates the built-in protector simulation module, which performs detailed simulation calculations based on the structural characteristics and working principles of the high-voltage cable sheath protector. Specifically, the structural characteristics and working principles of the protector will affect its response behavior under actual voltage surges. Therefore, the simulation must accurately simulate the composition and working mechanism of the protector, including its response voltage, the threshold for triggering the protection mechanism, and how various protection methods, such as voltage leakage protection, short-circuit protection, and overvoltage absorption, are used to protect the safety of the cable system.

[0028] The voltage surge characteristics in the simulation need to be modeled from input to output. During this process, voltage surges, such as transient overvoltages, harmonic overvoltages, and lightning overvoltages, act as input signals to the protector. The simulation calculates in real-time how the voltage input passes through various stages of the protector (such as filtering, absorption, and regulation) and ultimately affects the output. This process reveals the protector's performance under different types of voltage surges and extracts the impact of voltage surges on the protector.

[0029] For example, the extracted impulse electrical characteristics include the following main types of effects: transient overvoltage, i.e., high-amplitude, short-duration voltage fluctuations. The simulation will show the immediate response of the protector to this type of voltage impulse, such as whether it can absorb the impulse voltage in time to avoid damage to the cable sheath; harmonic overvoltage, i.e., the effect of voltage waveform distortion in the power system on the protector. The simulation results can show the protector's ability to suppress high-order harmonic voltages, especially whether harmonic components will cause performance degradation or aging of the protector in long-term operation; lightning overvoltage, i.e., strong voltage fluctuations, usually caused by lightning strikes. The simulation will show the response time and effectiveness of the protector under strong voltage impulses, verifying whether it can protect the cable system under lightning overvoltage conditions; short-circuit overvoltage, i.e., high-amplitude voltage impulses caused by short-circuit faults in the power system. The simulation will evaluate the protector's ability to react to such rapid voltage fluctuations, checking whether it can effectively trigger the protection mechanism to ensure that the cable is not damaged.

[0030] By extracting these impulse electrical characteristics, important data support can be provided for subsequent protection device configuration optimization, ensuring that the protection device can effectively cope with various overvoltage situations in actual operation and guarantee the safe operation of the high-voltage cable system.

[0031] P20: Based on the described impulse electrical characteristics, a matching set is established by matching with preset protector configuration parameters.

[0032] Furthermore, step P20 in this embodiment of the application also includes:

[0033] P21: Establish the response relationship between the preset protector configuration parameters and the impulse voltage, and construct a response relationship list; P22: Extract the compensation demand electrical characteristics based on the impulse electrical characteristics, and use the compensation demand electrical characteristics as an index to search and match in the response relationship list to obtain a matching relationship set.

[0034] Specifically, the extracted impulse electrical characteristics are matched with the preset protector configuration parameters to establish a matching relationship set, thereby providing a basis for protector configuration optimization.

[0035] First, establish the relationship between preset protector configuration parameters and impulse voltage response. These preset protector configuration parameters are a set of parameters pre-set according to the technical specifications and actual operational requirements of the high-voltage cable sheath protector. These parameters include, but are not limited to, the protector's rated voltage, current capacity, response time, and residual voltage. The goal of this process is to clarify how different protector configuration parameters respond to various voltage impulses, including transient overvoltages, harmonic overvoltages, and lightning overvoltages. Specifically, this involves collecting and organizing the configuration parameters of different protectors, such as the protector's voltage response threshold, response speed, suppression capability, and absorption capacity, while recording the protector's performance under actual voltage impulses. The protector's response behavior will differ for each type of voltage impulse; therefore, a detailed analysis of the correspondence between these configuration parameters and voltage impulses is necessary.

[0036] By analyzing the performance of the protector under various voltage surges, a response relationship list can be constructed. This list records the relationship between different protector configurations and specific voltage surge types. Each record reflects how the protector responds when it encounters a certain voltage surge.

[0037] Next, compensation demand electrical characteristics are further extracted based on the impulse electrical characteristics. Impulse electrical characteristics refer to the electrical characteristics exhibited by the cable sheath protector under different voltage impulses, reflecting the overvoltage conditions the protector may encounter during actual operation. Compensation demand electrical characteristics, extracted from the impulse electrical characteristics, describe the electrical characteristics the protector needs to possess under specific voltage impulses to ensure effective protection of the cable sheath. These compensation demand electrical characteristics are used as an index for searching and matching in the response relationship list. Through this matching process, preset protector configuration parameters that match the compensation demand electrical characteristics are found, thus obtaining a matching relationship set. This matching relationship set includes the optimal matching scheme between protector configuration parameters and voltage characteristics for different voltage impulse types, providing a basis for subsequent protector configuration optimization and ensuring that the protector can operate stably and reliably under different voltage environments, thereby achieving effective protection of the cable sheath.

[0038] Furthermore, step P21 in this embodiment of the application also includes:

[0039] P21-1: The preset protector configuration parameters include cable length, grounding method, and discharge damping circuit parameters. The discharge damping circuit parameters include discharge capacitor and damping resistor. The response relationships between cable length, grounding method, discharge damping circuit parameters, and impulse voltage are established to construct a first-level response relationship list. P21-2: The cable length, grounding method, and discharge damping circuit parameters are combined in two-parameter combinations to establish a response relationship between the two-parameter combination and impulse voltage, constructing a second-level response relationship list. P21-3: The cable length, grounding method, and discharge damping circuit parameters are combined in multiple-parameter combinations to establish a response relationship between the multiple-parameter combination and impulse voltage, constructing a third-level response relationship list. P21-4: Using the first-level response relationship list as the base layer, the second-level response relationship list as the intermediate layer, and the third-level response relationship list as the top layer, a multi-level response relationship list is established.

[0040] It should be understood that the process of constructing the relationship between the preset protector configuration parameters and the impulse voltage response can be further refined. Specifically, the preset protector configuration parameters are first determined. These parameters include cable length, grounding method, and discharge damping circuit parameters, with the discharge damping circuit parameters further subdivided into discharge capacitor and damping resistor. For each of these parameters, their response relationship with the impulse voltage is established, and a first-level response relationship list is constructed accordingly. This process allows for a detailed analysis of the impulse voltage response under the individual action of each parameter. Through experiments and simulations, the specific impact of cable length, grounding method, and discharge damping circuit parameters on the impulse voltage is determined, and these relationships are accurately recorded in the first-level response relationship list, laying the foundation for subsequent matching work.

[0041] After constructing the primary response relationship list, the cable length, grounding method, and discharge damping circuit parameters are further combined into two-parameter combinations to explore the response relationship with impulse voltage under these combinations, thus constructing a secondary response relationship list. Specifically, the effects of cable length and grounding method, cable length and discharge damping circuit parameters (including discharge capacitor and damping resistor), and grounding method and discharge damping circuit parameters on impulse voltage are analyzed separately. By establishing the response relationship between these two-parameter combinations and impulse voltage, a secondary response relationship list can be formed. In this list, each record details the protector's response under a specific two-parameter combination, thus more accurately capturing the interaction between different parameters and their combined impact on voltage impulses.

[0042] Building upon the completion of the secondary response relationship list, the parameters of cable length, grounding method, and discharge damping circuit are further combined using multiple parameters to comprehensively establish the response relationship between the multi-parameter combination and the impulse voltage, thus constructing a tertiary response relationship list. This step further increases the complexity of parameter combinations, encompassing more configuration factors, such as all possible combinations of cable length, grounding method, and discharge damping circuit. Through response analysis of multi-parameter combinations, the complex operating conditions faced by the protector in actual operation can be simulated more accurately, providing more comprehensive and precise data for subsequent optimization configuration. The response relationships under these multi-parameter combinations are recorded in detail in the tertiary response relationship list.

[0043] Finally, based on the first-level response relationship list, with the second-level response relationship list as the intermediate layer and the third-level response relationship list as the top layer, a multi-level response relationship list is constructed. This multi-level structural design, progressing from single-parameter to two-parameter combinations and then to multi-parameter comprehensive consideration, provides a clearer hierarchical structure, enabling the response data of each layer to be effectively transmitted and referenced, thus providing orderly and systematic support for subsequent protector configuration optimization.

[0044] Furthermore, step P22 in the embodiments of this application also includes:

[0045] P22-1: Based on the electrical characteristics of the compensation demand, match them sequentially from low to high in the multi-level response relationship list to obtain the first-level matching relationship, the second-level matching relationship, and the third-level matching relationship; P22-2: Combine the first-level matching relationship, the second-level matching relationship, and the third-level matching relationship to obtain the matching relationship set.

[0046] In one possible embodiment of this application, the process of extracting and matching compensation demand electrical characteristics based on impulse electrical characteristics can be further refined. First, based on the compensation demand electrical characteristics, matching is performed sequentially from low to high in a multi-level response relationship list. This means that matching is first performed in the first-level response relationship list to obtain a first-level matching relationship that matches the compensation demand electrical characteristics. The first-level matching relationship is a preliminary matching result based on the response relationship between a single parameter, such as cable length, grounding method, or discharge damping circuit parameters, and the impulse voltage. Next, matching is performed in the second-level response relationship list to obtain a second-level matching relationship. The second-level matching relationship is a matching result based on a combination of two parameters, such as the response relationship between cable length and grounding method, or cable length and discharge damping circuit parameters, and the impulse voltage. Finally, matching is performed in the third-level response relationship list to obtain a third-level matching relationship. The third-level matching relationship is a matching result based on a combination of multiple parameters, that is, a comprehensive consideration of the response relationship between cable length, grounding method, and discharge damping circuit parameters and the impulse voltage. Through this low-to-high matching sequence, the matching results can be gradually refined, ensuring the comprehensiveness and accuracy of the matching process.

[0047] Next, the obtained first-level, second-level, and third-level matching relationships are combined, that is, the preset protector configuration parameters obtained from different levels of matching relationships are integrated to form a comprehensive matching relationship set. This matching relationship set includes all protector configuration parameters that meet the compensation requirements' electrical characteristics, from single parameters to multi-parameter combinations, providing a comprehensive range of candidate solutions for subsequent protector configuration optimization. This combination method fully considers the impact of different parameters and their combinations on protector performance, thereby improving the adaptability and reliability of protector configuration.

[0048] P30: Optimize the matching relationship set by setting the protection quantization target, and search for the protector configuration parameter strategy corresponding to the best quantization target that satisfies the protection quantization target or satisfies the search constraints, and use it as the target configuration strategy.

[0049] Furthermore, by optimizing the matching relationship set according to the set protection quantification target, step P30 of this application embodiment also includes:

[0050] P31: Set protection quantification targets, which include one or more of the following: maximum overvoltage suppression, shortest response time, minimum energy loss, and minimum cost; P32: Using preset protector configuration parameters as optimization variables and maximizing the protection quantification targets as the optimization evaluation objective, construct an optimization model based on the response relationships of each preset protector configuration parameter to reflect the relationship between protector configuration parameters and voltage surge characteristics; P33: Sequentially use each matching relationship in the matching relationship set as a constraint condition to solve the optimization model and obtain the optimal configuration parameter strategy for each matching relationship; P34: Perform a global optimal search based on the optimal configuration parameter strategies of all matching relationships to determine the target maximum configuration strategy, which is then used as the target configuration strategy.

[0051] Optionally, the matching relationship set can be optimized by setting protection quantification targets, that is, by optimizing the protector configuration parameters, an optimal protector configuration strategy can be found to achieve the best protection for high-voltage cables.

[0052] First, clearly define the protection quantification objectives. These objectives can include one or more of the following: maximum overvoltage suppression, shortest response time, minimum energy loss, and minimum cost. Specifically, maximum overvoltage suppression refers to the protector's ability to effectively suppress voltage amplitude and prevent damage to the cable sheath when facing overvoltages (such as lightning strikes or transient overvoltages). Minimum response time refers to the time required for the protector to activate its protection mechanism after receiving a voltage surge signal; a shorter response time results in better protection. Minimum energy loss refers to minimizing energy loss when absorbing voltage surges, thereby improving the protector's efficiency. Minimum cost refers to reducing the manufacturing and maintenance costs of the protector while meeting the above protection objectives. In practical applications, one or more protection quantification objectives can be selected based on different needs to ensure optimal performance of the protector under specific environments.

[0053] Next, using preset protector configuration parameters as optimization variables and maximizing the protection quantification target as the optimization evaluation objective, an optimization model is constructed based on the response relationships of each preset protector configuration parameter. The goal of this model is to maximize the set protection quantification target. In this process, the optimization model needs to reflect the relationship between the protector configuration parameters and voltage surge characteristics based on the response relationships of each preset protector configuration parameter. Specifically, the optimization variables are determined, using the preset protector configuration parameters as optimization variables; these parameters can be adjusted in actual operation. Using the previously constructed multi-level response relationship list, the specific relationship between each optimization variable and the voltage surge characteristics is determined. Then, the protection quantification target is transformed into a mathematical expression, serving as the objective function of the optimization model. For example, if the objective is maximum overvoltage suppression, the objective function could be maximizing the overvoltage suppression effect.

[0054] Then, each matching relation in the matching relation set is used sequentially as a constraint to solve the optimization model. Specifically, for each matching relation in the matching relation set, it is input as a constraint into the optimization model. These constraints reflect the performance requirements of the protector under specific parameter configurations. Therefore, optimization algorithms, such as genetic algorithms and particle swarm optimization, can be used to solve the optimization model to find the optimal configuration parameter strategy that can achieve the protection quantification goal under these constraints. Finally, the optimal configuration parameter strategy for each matching relation is recorded, forming a set containing all local optima.

[0055] Finally, a global optimal search is performed based on the optimal configuration parameter strategy for all matching relationships. This involves evaluating all local optima, comparing their performance in protecting the quantization objective, and then selecting a global optimal solution that maximizes the protection of the quantization objective from among all local optima. This global optimal solution will serve as the final target configuration strategy. Verification of the global optimal solution ensures that it meets all the requirements for protecting the quantization objective in actual operation.

[0056] Furthermore, step P33 in this embodiment of the application also includes:

[0057] P33-1: When the matching relationship includes the parameters of the bleeder damping circuit, the bleeder capacitor is used as the first optimization variable to evaluate the bleeder effect and calculate the voltage division coefficient. The initial value range of the bleeder capacitor is determined with the voltage division coefficient < 1 as the target. P33-2: Resonance prediction analysis is performed based on the value of the bleeder capacitor. When there is a new resonance, the damping resistor is used as the second optimization variable to evaluate the resonance suppression. P33-3: Balanced optimization is performed based on the bleeder effect evaluation results and the resonance suppression evaluation results to determine the parameter values ​​of the bleeder capacitor and the damping resistor. P33-4: When there is no new resonance after the introduction of the bleeder capacitor, the damping resistor is omitted, and the bleeder capacitor is output as the configuration strategy.

[0058] Specifically, the optimization process for the parameters of the bleed damping circuit can be further refined to ensure that the optimal protector configuration parameter strategy is found while meeting the protection quantification objectives.

[0059] Specifically, when the matching relationship includes parameters of the bleeder damping circuit, the bleeder capacitor is first used as the primary optimization variable to evaluate the bleeder effect and calculate the voltage division coefficient. By analyzing the bleeder capacitor's effect on overvoltage discharge under different values, the corresponding voltage division coefficient is calculated. The voltage division coefficient refers to the ratio of the voltage across the protector to the system voltage during an overvoltage event. With a target voltage division coefficient less than 1, the initial value range for the bleeder capacitor is determined. This step ensures that the bleeder capacitor can effectively reduce the voltage across the protector during overvoltage events, thereby reducing damage to the cable sheath.

[0060] Next, resonance prediction analysis is performed based on the value of the bleeder capacitor. Resonance phenomena in electrical systems can lead to unstable voltage fluctuations, affecting the normal operation of the protector. Therefore, resonance prediction analysis needs to be performed for different bleeder capacitor values ​​to ensure that no new resonance phenomena occur under different configurations. If new resonance is found during the prediction process, it means that the existing bleeder capacitor configuration cannot effectively suppress voltage fluctuations. In this case, the damping resistor is adjusted as the second optimization variable. The role of the damping resistor is to reduce the resonant frequency in the system by consuming electrical energy, thereby reducing instability. The adjustment of the damping resistor and the evaluation analysis of resonance suppression can ensure that the protector can still operate stably when facing complex voltage surges.

[0061] Then, based on the evaluation results of discharge effect and resonance suppression, a balanced optimization is performed to determine the parameter values ​​of the discharge capacitor and damping resistor. Specifically, the discharge effect and resonance suppression effect can be comprehensively considered, and the values ​​of the discharge capacitor and damping resistor can be balanced and optimized using optimization algorithms such as genetic algorithms and particle swarm optimization. Under the premise of meeting the protection quantification objectives, the optimal parameter values ​​of the discharge capacitor and damping resistor are found to ensure that the protector can work effectively under various operating conditions.

[0062] Finally, if no new resonance occurs after introducing the bleeder capacitor, meaning that voltage surges and resonance issues in the system have been effectively controlled, then the adjustment of the damping resistor can be omitted, and the optimal bleeder capacitor value can be directly output as the protector configuration strategy. In other words, without adjusting the damping resistor, the bleeder capacitor can already meet the requirements of voltage surge suppression and voltage stability, and the optimal configuration value of the bleeder capacitor is ultimately output as the protector's configuration strategy.

[0063] P40: The target configuration strategy is verified by overvoltage simulation in the twin simulation space, and the target configuration strategy that meets the verification results is taken as the final protector configuration scheme.

[0064] It should be understood that by performing overvoltage simulation verification on the obtained target configuration strategy through twin simulation space, it is ensured that the configuration scheme can work effectively in the actual voltage environment and achieve the expected protection effect.

[0065] First, the target configuration strategy is validated through overvoltage simulation in a twin simulation space. Twin simulation technology, by establishing a virtual model of the high-voltage cable and its protectors, can simulate voltage fluctuations and impulse characteristics in a real-world environment. In this process, the target configuration strategy—the protector configuration parameters obtained through the previous optimization process—is applied as input parameters to the simulation model. The simulation model simulates different types of overvoltage events encountered by the cable in the actual operating environment (such as transient overvoltage, lightning overvoltage, harmonic overvoltage, etc.) and the impact of these voltage impulses on the protector performance. This simulation validation verifies the effectiveness of the target configuration strategy under these voltage conditions, ensuring that the selected configuration provides sufficient protection and prevents damage to the cable sheath.

[0066] During overvoltage simulation, the simulation space meticulously records the protector's response under various voltage conditions, including key performance indicators such as voltage absorption, filtering, and response time. The simulation results help evaluate the protector's stability and protection effectiveness in the face of different overvoltage events. The verification process includes not only the intensity of the voltage surge but also various factors such as voltage waveform, duration, and frequency, ensuring the comprehensiveness and representativeness of the simulation results.

[0067] Finally, the target configuration strategy that meets the verification results is selected as the final protector configuration scheme. In other words, only those configuration strategies that, through twin simulation verification, can maintain effective operation under various voltage surge conditions will be selected as the final protector configuration scheme. This simulation verification avoids unforeseen problems in practical applications, ensuring that the protector can operate stably in complex voltage environments and achieve the expected protection effect.

[0068] In summary, the embodiments of this application have at least the following technical effects:

[0069] This application utilizes twin simulation technology to accurately simulate the operating state of high-voltage cables, providing high-precision data support for protector configuration and enabling fine-tuning. It employs a multi-level parameter matching and optimization strategy to effectively improve the overvoltage protection performance of protectors under complex voltage environments. While meeting protection quantification targets, it optimizes configuration parameters to reduce system costs. The twin simulation space is used to perform overvoltage simulation verification of the target configuration strategy, ensuring the effectiveness and reliability of the configuration scheme and reducing implementation risks. By optimizing protector configuration, it reduces overvoltage damage to the cable sheath, enhances the stability of the high-voltage cable system, and ensures its safe operation.

[0070] This technology achieves the goal of accurately optimizing protector configuration parameters based on twin simulation of voltage environment, thereby improving the effectiveness and reliability of protectors under complex overvoltage conditions.

[0071] Example 2 is based on the same inventive concept as the high-voltage cable sheath protector configuration optimization method based on twin simulation in the previous examples, such as... Figure 2 As shown, this application provides a high-voltage cable sheath protector configuration optimization system based on twin simulation. The system and method embodiments in this application are based on the same inventive concept. The system includes:

[0072] The environmental characteristics simulation module 11 is used to collect the voltage environment characteristics of high-voltage cables, simulate the voltage environment characteristics through a twin simulation space, extract the voltage influence relationship with the high-voltage cable sheath protector as the target, and obtain the impulse electrical characteristics.

[0073] The configuration parameter matching module 12 is used to match the impulse electric characteristics with preset protector configuration parameters and establish a matching relationship set.

[0074] The configuration strategy optimization module 13 is used to optimize the matching relationship set by setting the protection quantization target, and search for the protector configuration parameter strategy corresponding to the best quantization target that satisfies the protection quantization target or satisfies the search constraints, and use it as the target configuration strategy.

[0075] The overvoltage simulation verification module 14 is used to perform overvoltage simulation verification on the target configuration strategy through the twin simulation space, and to take the target configuration strategy that meets the verification results as the final protector configuration scheme.

[0076] Furthermore, the environmental characteristic simulation module 11 is also used to perform the following steps:

[0077] By acquiring historical data or sensor data, the voltage characteristics of the target high-voltage cable's operating environment are obtained, including voltage range, voltage fluctuations, overvoltage events, and harmonic component data. Based on these voltage characteristics, the voltage impulse characteristics encountered by the cable sheath under various voltage conditions are extracted. These voltage impulse characteristics include: transient overvoltage, harmonic overvoltage, lightning overvoltage, and short-circuit overvoltage. Combining these voltage characteristics with the corresponding voltage impulse characteristics, the voltage environment characteristics are determined to describe the influence patterns of voltage characteristics on the cable in the high-voltage cable's operating environment.

[0078] Furthermore, the environmental characteristic simulation module 11 is also used to perform the following steps:

[0079] The target high-voltage cable is simulated in a twin simulation space according to its voltage environment characteristics to reproduce the actual operating state of the high-voltage cable. The protector simulation module built into the twin simulation space is activated. The protector is used as the simulation target. According to the structural characteristics and working principle of the protector, the influence of the impulse voltage on the protector from input to output is simulated. The voltage impulse characteristics of the high-voltage cable sheath protector are extracted to obtain the impulse electrical characteristics.

[0080] Furthermore, the configuration parameter matching module 12 is also used to perform the following steps:

[0081] Establish a response relationship between preset protector configuration parameters and impulse voltage, and construct a response relationship list; extract compensation demand electrical features based on the impulse electrical characteristics, and use the compensation demand electrical features as indexes to search and match in the response relationship list to obtain a matching relationship set.

[0082] Furthermore, the configuration parameter matching module 12 is also used to perform the following steps:

[0083] The preset protector configuration parameters include cable length, grounding method, and discharge damping circuit parameters. The discharge damping circuit parameters include discharge capacitor and damping resistor. A first-level response relationship list is constructed by establishing the response relationship between cable length, grounding method, discharge damping circuit parameters, and impulse voltage. A second-level response relationship list is constructed by combining two parameters of the cable length, grounding method, and discharge damping circuit parameters with two parameters and establishing the response relationship between the two parameter combinations and impulse voltage. A third-level response relationship list is constructed by combining multiple parameters of the cable length, grounding method, and discharge damping circuit parameters with multiple parameters and establishing the response relationship between the multiple parameter combinations and impulse voltage. A multi-level response relationship list is then constructed, using the first-level response relationship list as the base layer, the second-level response relationship list as the intermediate layer, and the third-level response relationship list as the top layer.

[0084] Furthermore, the configuration parameter matching module 12 is also used to perform the following steps:

[0085] Based on the characteristics of the compensation demand electricity, the matching is performed sequentially from low to high in the multi-level response relationship list to obtain the first-level matching relationship, the second-level matching relationship, and the third-level matching relationship; the first-level matching relationship, the second-level matching relationship, and the third-level matching relationship are combined to obtain the matching relationship set.

[0086] Furthermore, the configuration strategy optimization module 13 is also used to perform the following steps:

[0087] A protection quantification objective is set, which includes one or more of the following: maximum overvoltage suppression, shortest response time, minimum energy loss, and minimum cost. Using preset protector configuration parameters as optimization variables and maximizing the protection quantification objective as the optimization evaluation goal, an optimization model is constructed based on the response relationship of each preset protector configuration parameter to reflect the relationship between the protector configuration parameters and voltage surge characteristics. Each matching relationship in the matching relationship set is sequentially used as a constraint condition to solve the optimization model, obtaining the optimal configuration parameter strategy for each matching relationship. A global optimal search is performed based on the optimal configuration parameter strategies for all matching relationships to determine the target maximum configuration strategy, which is then used as the target configuration strategy.

[0088] Furthermore, the configuration strategy optimization module 13 is also used to perform the following steps:

[0089] When the matching relationship includes parameters of the bleeder damping circuit, the bleeder capacitor is used as the first optimization variable for bleeder effect evaluation and voltage division coefficient calculation, and the initial value range of the bleeder capacitor is determined with the voltage division coefficient < 1 as the target; resonance prediction analysis is performed based on the value of the bleeder capacitor; when there is a new resonance, the damping resistor is used as the second optimization variable for resonance suppression evaluation analysis; balanced optimization is performed based on the bleeder effect evaluation results and resonance suppression evaluation results to determine the parameter values ​​of the bleeder capacitor and the damping resistor; when there is no new resonance after the introduction of the bleeder capacitor, the damping resistor is omitted, and the bleeder capacitor is output as the configuration strategy.

[0090] It should be noted that the order of the embodiments described above is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. Furthermore, the above description focuses on specific embodiments of this specification. Additionally, the processes depicted in the accompanying drawings do not necessarily require a specific or sequential order to achieve the desired results. In some implementations, multitasking and parallel processing are possible or may be advantageous.

[0091] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0092] This specification and accompanying drawings are merely illustrative examples of this application and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from its scope. Therefore, if such modifications and modifications fall within the scope of this application and its equivalents, this application intends to include such modifications and modifications.

Claims

1. A method for optimizing the configuration of high-voltage cable sheath protectors based on twin simulation, characterized in that, include: The voltage environment characteristics of high-voltage cables are collected, and the voltage environment characteristics are simulated through a twin simulation space. The voltage influence relationship is extracted with the high-voltage cable sheath protector as the target to obtain the impulse electrical characteristics. A matching set is established based on the described impulse electrical characteristics and preset protector configuration parameters. The matching relationship set is optimized by setting the protection quantization target, and the protector configuration parameter strategy corresponding to the best quantization target that satisfies the protection quantization target or satisfies the search constraints is obtained as the target configuration strategy. The target configuration strategy is verified by overvoltage simulation in the twin simulation space, and the target configuration strategy that meets the verification results is taken as the final protector configuration scheme. The step of matching based on the impulse electrical characteristics using preset protector configuration parameters to establish a matching relationship set includes: Establish the relationship between preset protector configuration parameters and impulse voltage response, and construct a response relationship list; Based on the impact electrical characteristics, the compensation demand electrical features are extracted, and the compensation demand electrical features are used as indexes to search and match in the response relationship list to obtain a matching relationship set. The process of establishing the relationship between preset protector configuration parameters and impulse voltage, and constructing a response relationship list, includes: The preset protector configuration parameters include cable length, grounding method, and discharge damping circuit parameters. The discharge damping circuit parameters include discharge capacitor and damping resistor. The response relationship between cable length, grounding method, discharge damping circuit parameters and impulse voltage is established respectively, and a first-level response relationship list is constructed. The cable length, grounding method, and discharge damping circuit parameters are combined into two parameters to establish the response relationship between the two parameter combinations and the impulse voltage, and a list of secondary response relationships is constructed. The cable length, grounding method, and discharge damping circuit parameters are combined into three parameters to establish the response relationship between the three parameter combinations and the impulse voltage, and a three-level response relationship list is constructed. A multi-level response relationship list is established, with the first-level response relationship list as the base layer, the second-level response relationship list as the intermediate layer, and the third-level response relationship list as the top layer.

2. The method for optimizing the configuration of high-voltage cable sheath protectors based on twin simulation according to claim 1, characterized in that, The voltage environment characteristics of high-voltage cables are collected, including: By acquiring historical data or sensor data, the voltage characteristics of the target high-voltage cable's operating environment are obtained, including voltage range, voltage fluctuations, overvoltage events, and harmonic component data. Voltage characteristics of the target high-voltage cable under various voltage conditions are extracted based on the voltage characteristics of the cable sheath. By combining the voltage characteristics and the corresponding voltage impulse characteristics, the voltage environment characteristics are determined to describe the influence mode of voltage characteristics on the cable in the working environment of the high-voltage cable.

3. The method for optimizing the configuration of high-voltage cable sheath protectors based on twin simulation according to claim 2, characterized in that, The voltage impulse characteristics include: transient overvoltage, harmonic overvoltage, lightning overvoltage, and short-circuit overvoltage.

4. The method for optimizing the configuration of high-voltage cable sheath protectors based on twin simulation according to claim 1, characterized in that, Voltage influence relationships were extracted using high-voltage cable sheath protectors as the target to obtain impulse electrical characteristics, including: The target high-voltage cable is simulated in a twin simulation space according to its voltage environment characteristics to reproduce the actual operating state of the high-voltage cable. The protector simulation module built into the twin simulation space is activated. The protector is used as the simulation target. According to the structural characteristics and working principle of the protector, the influence of the impulse voltage on the protector from input to output is simulated. The voltage impulse characteristics of the high-voltage cable sheath protector are extracted to obtain the impulse electrical characteristics.

5. The method for optimizing the configuration of high-voltage cable sheath protectors based on twin simulation according to claim 1, characterized in that, Based on the described impulse electrical characteristics, compensation demand electrical features are extracted. These compensation demand electrical features are then used as indexes to search and match within the response relationship list, resulting in a set of matching relationships, including: Based on the aforementioned characteristics of the compensation demand electricity, the matching is performed sequentially from low to high in the multi-level response relationship list to obtain the first-level matching relationship, the second-level matching relationship, and the third-level matching relationship; The first-level matching relationship, the second-level matching relationship, and the third-level matching relationship are combined to obtain the matching relationship set.

6. The method for optimizing the configuration of high-voltage cable sheath protectors based on twin simulation according to claim 1, characterized in that, The matching relationship set is optimized by setting a protection quantification target, including: Set protection quantification targets, which include one or more of the following: maximum overvoltage suppression, shortest response time, minimum energy loss, and minimum cost; Using preset protector configuration parameters as optimization variables and maximizing the protection quantification target as the optimization evaluation target, an optimization model is constructed based on the response relationship of each preset protector configuration parameter to reflect the relationship between protector configuration parameters and voltage surge characteristics. The matching relationships in the matching relationship set are used as constraints in turn to solve the optimization model and obtain the optimal configuration parameter strategy for each matching relationship. A global optimal search is performed based on the best configuration parameter strategy for all matching relationships to determine the target maximum configuration strategy, which is then used as the target configuration strategy.

7. The method for optimizing the configuration of high-voltage cable sheath protectors based on twin simulation according to claim 6, characterized in that, The matching relationships in the matching relationship set are used sequentially as constraints to solve the optimization model, including: When the matching relationship includes the parameters of the bleed damping circuit, the bleed capacitor is used as the first optimization variable to evaluate the bleed effect and calculate the voltage division coefficient. The initial value range of the bleed capacitor is determined with the voltage division coefficient <1 as the target. Based on the value of the discharge capacitor, resonance prediction analysis is performed. When there is a new resonance, the damping resistor is used as the second optimization variable for resonance suppression evaluation analysis. Based on the evaluation results of discharge effect and resonance suppression, a balanced optimization is performed to determine the parameter values ​​of discharge capacitor and damping resistor; When no new resonance is added after the introduction of the bleeder capacitor, the damping resistor is omitted, and the bleeder capacitor is used as the configuration strategy output.

8. A high-voltage cable sheath protector configuration optimization system based on twin simulation, characterized in that, The system is used to implement the high-voltage cable sheath protector configuration optimization method based on twin simulation as described in any one of claims 1-7, the system comprising: The environmental characteristics simulation module is used to collect the voltage environment characteristics of high-voltage cables, simulate the voltage environment characteristics through a twin simulation space, extract the voltage influence relationship with the high-voltage cable sheath protector as the target, and obtain the impulse electrical characteristics. The configuration parameter matching module is used to match the impulse electric characteristics with preset protector configuration parameters and establish a matching relationship set. The configuration strategy optimization module is used to optimize the matching relationship set by setting the protection quantization target, and search for the protector configuration parameter strategy corresponding to the best quantization target that satisfies the protection quantization target or satisfies the search constraints, and use it as the target configuration strategy. The overvoltage simulation verification module is used to perform overvoltage simulation verification on the target configuration strategy through the twin simulation space, and the target configuration strategy that meets the verification results is used as the final protector configuration scheme.

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