Power grid hot-line work real-model practical training safety optimization method, device, equipment and medium

Abstract

The invention discloses a power grid hot-line work real-model practical training safety optimization method, system equipment and a medium, and the method comprises the steps: obtaining a practical training environment and equipment parameters, and calculating a single-phase ground distributed capacitance value of a practical training line; obtaining a single-phase capacitance value parameter of the three-phase capacitor according to the distributed capacitance value; acquiring human body electric shock related parameters; determining a power supply voltage upper limit value based on the target rated phase voltage, the distributed capacitance value, the single-phase capacitance value parameter and the acquired human body electric shock related parameters; setting an initial power supply voltage value, and calculating a single-phase reactance value of the three-phase series reactor based on the power supply voltage value; and calculating an electric shock current value when the human body is in electric shock by combining the single-phase reactance value, and judging whether to adjust the power supply voltage value based on the electric shock current value until the safety requirement is met. When a human body is in an electric shock, voltage of a contact point is automatically reduced, current is limited to a safe range, and training safety is improved; meanwhile, the circuit structure is simplified by adopting a single-phase system design, and the hardware cost and energy consumption are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of live-line operation safety design, and in particular to a safety optimization method, system, equipment and medium for real-life practical training of live-line operation in a power grid. Background Art

[0002] The current real-life training system for live grid operations mainly simulates real live environments (such as transmission towers, conductors, and insulating tools) through physical simulation equipment, and combines virtual reality technology to build immersive training scenarios, allowing trainees to master operating procedures under low-risk conditions. At the same time, it uses sensor networks and AI algorithms to monitor key indicators such as operating posture and safe distance in real time and generate evaluation reports, supplemented by AR technology to superimpose real-time guidance information, while low-voltage simulation of high electric fields, electromagnetic shielding, and physiological monitoring technology ensure training safety.

[0003] However, existing systems still face challenges such as insufficient simulation of high-voltage environments, lack of tactile feedback, and reliance on artificial data for intelligent assessment. Specifically, models may be simplistic and lack coupling, resulting in inaccurate parameter acquisition and unreliable iteration processes, which can distort safety assessments. These issues stem in part from theoretical flaws in electrical models, incomplete impedance calculations, and conflicts between feasibility and authenticity in training. Summary of the Invention

[0004] In view of the above existing problems, the present invention is proposed.

[0005] Therefore, the present invention provides a safety optimization method and system for real-life practical training of live grid operations to solve the problems of over-simplification and lack of coupling in the current safety design of the simulation environment, inaccurate parameter acquisition and unreliable iteration process, and incomplete impedance calculation, which lead to distorted safety assessment, high risk of electric shock, and insufficient safety protection.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides a safety optimization method for real-world practical training of live grid operations, comprising:

[0008] Obtaining training environment and equipment parameters, and calculating a single-phase-to-ground distributed capacitance value of a training circuit based on the parameters;

[0009] Obtaining a single-phase capacitance value parameter of the three-phase capacitor according to the distributed capacitance value;

[0010] Obtain parameters related to human electric shock;

[0011] Determining an upper limit value of the power supply voltage based on the target rated phase voltage, the distributed capacitance value, the single-phase capacitance value parameter, and the acquired human body electric shock related parameters;

[0012] Setting a preliminary power supply voltage value, and calculating a single-phase reactance value of a three-phase series reactor based on the power supply voltage value;

[0013] Combined with the single-phase reactance value, the electric shock current value when the human body is electrocuted is calculated, and based on the electric shock current value, it is determined whether to adjust the power supply voltage value until it meets safety requirements.

[0014] As a preferred solution of the safety optimization method for real-life practical training of live grid working according to the present invention, obtaining parameters related to human electric shock includes:

[0015] Obtain human body resistance parameters, specifically, the upper and lower limits of human body resistance;

[0016] Human body electric shock parameters, specifically, the upper limit of human body electric shock current.

[0017] As a preferred solution of the safety optimization method for real-life practical training of live grid operations described in the present invention, the preliminary power supply voltage value is set to any value that is less than the upper limit value of the power supply voltage.

[0018] As a preferred solution of the safety optimization method for real-life practical training of live grid working according to the present invention, the single-phase reactance value of the three-phase series reactor is calculated based on the power supply voltage value, including:

[0019] Calculate the deviation ratio between the power supply voltage and the rated voltage;

[0020] Calculate and multiply the deviation ratio by the capacitive reactance of the capacitor, and take the absolute value to obtain the single-phase reactance value.

[0021] The beneficial effects of this preferred solution are: by connecting the series inductor, the voltage across the capacitor is ensured not to exceed its rated value, thus avoiding overvoltage damage; achieving overvoltage protection for the capacitor, and also reflecting the key role of the series inductor in voltage regulation.

[0022] As a preferred solution of the safety optimization method for real-life practical training of live grid working according to the present invention, the upper limit of the power supply voltage is determined based on the target rated phase voltage, the distributed capacitance value, the single-phase capacitance value parameter, and the obtained human body electric shock related parameters, including:

[0023] The upper limit of the power supply voltage is calculated based on the target rated phase voltage, distributed capacitance value, single-phase capacitance value parameters, upper and lower limits of human body resistance, and upper limit of human body electric shock current, which is expressed as:

[0024]

[0025] Among them, U smax is the upper limit of the power supply voltage, min() is the minimum value function; I th is the preset upper limit of the electric shock current for human body; XC is the single-phase capacitance reactance of the three-phase capacitor; U e is the target rated phase voltage of the system; R hmax is the upper limit of human body resistance; R hmin It is the lower limit of human body resistance.

[0026] The beneficial effects of this preferred solution are: the square root term in the numerator can ensure that the system rated voltage is large enough to cover the voltage drop caused by the electric shock current and human body resistance; taking the minimum value is to select the most conservative voltage upper limit for extreme cases of human body resistance to ensure absolute safety.

[0027] As a preferred solution of the safety optimization method for real-life practical training of live grid working according to the present invention, the electric shock current value when a person is electrocuted is calculated in combination with the single-phase reactance value, including:

[0028] The electric shock current is calculated by taking the upper and lower limits of human body resistance into account through the modulo function, combining the single-phase reactance and the single-phase capacitance reactance, and expressed as:

[0029]

[0030] Among them, I g The human body resistance is R h The electric shock current when T is the single-phase reactance value of the three-phase series reactor; X C is the single-phase capacitance reactance of the three-phase capacitor; U s is the power supply voltage value.

[0031] As a preferred solution of the safety optimization method for real-life practical training of live grid working according to the present invention, the method includes: determining whether to adjust the power supply voltage value based on the electric shock current value until it meets the safety requirements, including:

[0032] If the electric shock current exceeds the upper limit of the human body electric shock current, the set initial power supply voltage value is reduced, and the electric shock current value when the human body is electric shocked is calculated cyclically until the electric shock current does not exceed the upper limit of the human body electric shock current;

[0033] If the electric shock current does not exceed the upper limit of the human body electric shock current, the safety optimization ends.

[0034] In a second aspect, the present invention provides a safety optimization device for real-life training of live grid operations, comprising:

[0035] A first terminal of the three-phase adjustable power supply is grounded, and a second terminal of the three-phase adjustable power supply is connected to a power switch;

[0036] A first end of the power switch is connected to a three-phase adjustable power supply, and a second end of the power switch is connected to a three-phase transformer;

[0037] The first end of the three-phase transformer is connected to the power switch, and the second end of the three-phase transformer is connected to the three-phase series reactor;

[0038] The first end of the three-phase series reactor is connected to the transformer, and the second end of the three-phase series reactor is connected to the training circuit;

[0039] The first end of the training circuit is connected to a three-phase series reactor;

[0040] The capacitor is a three-phase capacitor, the first end of the capacitor is connected between the three-phase series inductor and the training line, and the second end of the capacitor is short-circuited and grounded.

[0041] In a third aspect, the present invention provides a computer device, comprising:

[0042] memory and processor;

[0043] The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions. When the computer-executable instructions are executed by the processor, the steps of the safety optimization method for real-life practical training of live grid operations are implemented.

[0044] In a fourth aspect, the present invention provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the steps of the safety optimization method for real-life practical training of live grid operations.

[0045] Compared with the existing technology, the beneficial effects of the present invention are as follows: the present invention automatically reduces the contact point voltage and limits the current to a safe range when a human body is electrocuted through the synergistic effect and calculation setting of the adjustable power supply, inductor and capacitor, thereby improving the safety of training; at the same time, the single-phase system design is adopted to simplify the line structure, reduce hardware costs and energy consumption, and through modular parameter configuration, such as adjustable power supply voltage and capacitor capacitance, it can flexibly adapt to the training needs of different voltage levels such as 10kV, and the three-phase line short-circuit design further reduces the complexity of the equipment, facilitates maintenance and control, and provides an efficient, economical and safe solution for live grid operation training. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0047] Figure 1 The present invention is a schematic diagram of the overall process of a safety optimization method for real-life practical training of live grid operations according to an embodiment of the present invention.

[0048] Figure 2 The present invention is a schematic diagram of a specific process of a safety optimization method for real-life practical training of live grid operations according to an embodiment of the present invention.

[0049] Figure 3 This is a training line voltage waveform diagram in an application scenario of the real-life training safety optimization method for live grid operations described in an embodiment of the present invention.

[0050] Figure 4 This is a fault current peak diagram in an application scenario of the safety optimization method for real-life practical training of live grid operations according to an embodiment of the present invention.

[0051] Figure 5 This is a diagram of the instantaneous value of fault current in an application scenario of the safety optimization method for real-life practical training of live grid operations according to an embodiment of the present invention.

[0052] Figure 6 This is a training line voltage waveform diagram in another application scenario of the real-life training safety optimization method for live grid operations described in an embodiment of the present invention.

[0053] Figure 7 This is a fault current peak diagram in another application scenario of the safety optimization method for real-life practical training of live grid operations according to an embodiment of the present invention.

[0054] Figure 8 This is a diagram of the instantaneous value of fault current in another application scenario of the safety optimization method for real-life practical training of live grid operations according to an embodiment of the present invention.

[0055] Figure 9 A schematic diagram of a device for applying the safety optimization method for real-life practical training of live grid operations according to an embodiment of the present invention. DETAILED DESCRIPTION

[0056] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of the specific embodiments of the present invention is given in conjunction with the accompanying drawings. It is obvious that the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in this field without creative work should fall within the scope of protection of the present invention.

[0057] Example 1, reference Figure 1 , which is an embodiment of the present invention, provides a safety optimization method for real-life training of live-line working on a power grid, comprising:

[0058] S100: Acquire training environment and equipment parameters, and calculate the single-phase-to-ground distributed capacitance value of the training circuit based on the parameters;

[0059] S200: Obtaining a single-phase capacitance parameter of a three-phase capacitor according to the distributed capacitance value;

[0060] S300: Obtaining parameters related to human electric shock;

[0061] S400: Determine an upper limit value of the power supply voltage based on the target rated phase voltage, the distributed capacitance value, the single-phase capacitance value parameters, and the acquired human electric shock related parameters;

[0062] S500: Setting a preliminary power supply voltage value, and calculating a single-phase reactance value of a three-phase series reactor based on the power supply voltage value;

[0063] S600: Calculate the electric shock current value when a person is electrocuted based on the single-phase reactance value, and determine whether to adjust the power supply voltage value based on the electric shock current value until it meets safety requirements.

[0064] It should be noted that the existing system lacks real-time detection and rapid response mechanisms for electric shock events, and will rely on some traditional leakage protectors, whose action thresholds are not sufficient to meet the ultra-high sensitivity requirements of live operations; at the same time, there may be an inability to actively adjust the fault point potential to limit the current at the moment of electric shock. The power supply of existing training equipment has a fixed voltage output, and when electric shock occurs, the trainee's body directly bears the full phase voltage, such as the 10kV simulation value; it often relies on the static current limiting method of series impedance (such as inductor), which cannot adapt to dynamic electric shock scenarios, nor can it distinguish between normal operating current and electric shock current, resulting in excessive current limiting of the system during training or insufficient current limiting when electric shock occurs.

[0065] Therefore, through a series of parameter acquisition and calculation steps in steps S100-S600, the power supply voltage is finally adjusted to ensure the safety of the training, and the contact point voltage is automatically reduced and the electric shock current is limited to a safe range when electric shock occurs.

[0066] Example 2, reference Figure 1-Figure 2 , which is an embodiment of the present invention, provides a safety optimization method for real-life practical training of live grid operations based on the above embodiments.

[0067] In the embodiment of the present application, the training environment and equipment parameters are obtained in step S100, including: determining basic parameters such as the line length of the training line and the height of the conductor installation according to actual needs.

[0068] In an optional implementation, the training environment and equipment parameters acquired in step S100 may further include a wire arrangement method and a wire model.

[0069] In the embodiment of the present application, in step S100, the single-phase to ground distributed capacitance value of the training circuit is calculated based on the parameters, and reference can be made to the calculation method of distributed capacitance given in the power system design manual, such as the zero-sequence capacitance calculation formula when there is no ground wire.

[0070] In an optional implementation, based on the above parameters, if the conductor is a three-phase structure, it can also be obtained by calculating the Maxwell matrix and performing correction.

[0071] In the embodiment of the present application, in step S200, the single-phase capacitance value parameter of the three-phase capacitor is obtained according to the distributed capacitance value;

[0072] Specifically, the single-phase capacitance value shall not be less than 100 times the single-phase-to-ground distributed capacitance value of the training circuit.

[0073] It should be noted that the setting of 100 times is mainly to significantly increase the proportion of single-phase capacitance value, so that the capacitive reactance of the capacitor is much smaller than the capacitive reactance of the distributed capacitance, thereby transferring the dominance of the system's ground admittance from the uncontrollable single-phase distributed capacitance value of the training line to the controllable single-phase capacitance value, and also eliminating the random influence of the distributed capacitance. The inductive reactance of the series inductor only needs to be designed for the dominant current, and the complexity of the inductor parameter calculation can be reduced through subsequent iterative calculations.

[0074] In the embodiment of the present application, obtaining parameters related to human electric shock in step S300 includes:

[0075] Obtaining human body resistance parameters, specifically, the upper and lower limits of human body resistance, i.e., the upper and lower limits;

[0076] Human body electric shock parameters, specifically, the upper limit of human body electric shock current.

[0077] In the embodiment of the present application, step S400 determines the upper limit of the power supply voltage based on the target rated phase voltage, the distributed capacitance value, the single-phase capacitance value parameter, and the acquired human body electric shock related parameters, including:

[0078] The upper limit of the power supply voltage is calculated based on the target rated phase voltage, distributed capacitance value, single-phase capacitance value parameters, upper and lower limits of human body resistance, and upper limit of human body electric shock current, which is expressed as:

[0079]

[0080] Among them, U smax is the upper limit of the power supply voltage, min() is the minimum value function; I th is the preset upper limit of the electric shock current for human body; X C is the single-phase capacitance reactance of the three-phase capacitor; U e is the system target rated phase voltage; R hmax is the upper limit of human body resistance; R hmin It is the lower limit of human body resistance.

[0081] It should be noted that the above formula can be solved by the elimination method and the quadratic equation. The purpose of the solution is to solve the upper limit of the power supply voltage under two conditions, one is the electric shock current safety constraint, and the other is the capacitor voltage safety constraint. Among them, the electric shock current safety constraint, that is, the human body electric shock current I th The voltage across the capacitor, U e Do not exceed its rated value.

[0082] Specifically, the square root term in the numerator ensures that the system rated voltage U e It is large enough to cover the voltage drop caused by the electric shock current and the human body resistance; the normalization of the denominator can avoid unreasonable solutions under specific parameter combinations and ensure the stability of the formula; the minimum value operation is to select the most conservative voltage upper limit for extreme cases of human body resistance, such as dry or wet skin, to ensure absolute safety.

[0083] At the same time, mathematical modeling is used to transform complex safety constraints into computable expressions, providing a basis for key parameters in system design.

[0084] In the embodiment of the present application, the preliminary power supply voltage value in step S500 is set to any value that is less than the upper limit value of the power supply voltage.

[0085] In the embodiment of the present application, the single-phase reactance value of the three-phase series reactor is calculated based on the power supply voltage value in step S500, including:

[0086] Calculate the deviation ratio between the power supply voltage and the rated voltage;

[0087] It should be noted that the deviation ratio is mainly used to ensure that the inductive reactance of the reactor is always positive, adapting to the characteristics of inductive components in actual engineering.

[0088] Calculate and multiply the deviation ratio by the capacitive reactance of the capacitor, and take the absolute value to obtain the single-phase reactance value.

[0089] Specifically, it can be expressed as:

[0090]

[0091] Among them, X T is the single-phase reactance value of the three-phase series reactor; X C is the single-phase capacitance reactance of the three-phase capacitor; U e is the system target rated phase voltage; U s is the determined power supply voltage value.

[0092] It should be noted that the series reactor is used to ensure that the voltage across the capacitor does not exceed its rated value. s Higher than rated voltage Ue When the reactor and the capacitor form a voltage divider circuit. The reactor shares the excess voltage, so that the working voltage of the capacitor remains at U e , to avoid overvoltage damage. Realizing overvoltage protection of capacitors also reflects the key role of series reactors in voltage regulation.

[0093] In an optional embodiment, the single-phase reactance value of the three-phase series reactor calculated based on the power supply voltage value in step S500 can also be reversely deduced by setting a safety current threshold according to human safety standards and calculating the total admittance of the system using the above parameters.

[0094] In the embodiment of the present application, in step S600, the electric shock current value when a human body is electrocuted is calculated by combining the single-phase reactance value, including:

[0095] The electric shock current is calculated by taking the upper and lower limits of human body resistance into account through the modulo function, combining the single-phase reactance and the single-phase capacitance reactance, and expressed as:

[0096]

[0097] Among them, I g The human body resistance is R h The electric shock current when T is the single-phase reactance value of the three-phase series reactor; X C is the single-phase capacitance reactance of the three-phase capacitor; U s is the power supply voltage value.

[0098] In the embodiment of the present application, step S600 determines whether to adjust the power supply voltage value based on the electric shock current value until the safety requirement is met, including:

[0099] If the electric shock current exceeds the upper limit of the human body electric shock current, the set initial power supply voltage value is reduced, and the electric shock current value when the human body is electric shocked is calculated cyclically until the electric shock current does not exceed the upper limit of the human body electric shock current;

[0100] If the electric shock current does not exceed the upper limit of the human body electric shock current, the safety optimization ends.

[0101] It should be noted that step S600 verifies the safety of the system under different human body resistances by iteratively calculating the human body electric shock current, and dynamically adjusts the power supply voltage value according to the results to ensure that the final design meets the absolute safety constraints and the electric shock current does not exceed the preset safety threshold. The modular function avoids the limitations of a single test scenario and ensures that all possible situations are covered. At the same time, this step sets a conditional trigger adjustment. If the electric shock current exceeds the standard in any scenario, the initial value of the power supply voltage is lowered, and the reactance value and electric shock current are recalculated, which can form a closed-loop feedback. Only when all electric shock currents are lower than the safety threshold can the final parameters be strictly compliant.

[0102] In addition, by combining the impedance characteristics of the inductive reactance of the reactor and the capacitive reactance of the capacitor, the system voltage and current are dynamically balanced to avoid the risk of local parameters meeting the standards but overall failure. By gradually reducing the power supply voltage instead of directly setting the minimum value, the system performance, such as the reactive power compensation capability, is retained as much as possible under the premise of safety.

[0103] Example 3, reference Figure 3-Figure 5 Based on the above embodiments, an application example of a safety optimization method for real-life practical training of live grid operations is provided.

[0104] Figure 3-Figure 5 The voltage and current waveforms of the live working real-type training system of the present invention are when the human body electric shock resistance is 500Ω, and the training line length is 1km; the single-phase distributed capacitance of the training line to the ground is 0.00165uf; the single-phase capacitance value of the capacitor is determined to be 0.165uf; the upper limit value of the human body resistance is 3000Ω, and the lower limit value is 500Ω; the upper limit value of the human body electric shock current is 50mA; the rated voltage of the training line is 10kV; the upper limit value of the power supply voltage is determined according to the rated phase voltage of the system, the single-phase capacitance reactance of the three-phase capacitor, the upper and lower limits of the human body resistance, and the upper limit value of the human body electric shock current. The upper limit value of the adjustable power supply voltage is further calculated to be 827V. Therefore, the adjustable power supply voltage is selected to be 120V, and the single-phase reactor of the three-phase series reactor is calculated to be 60.13H; the human body electric shock current range is calculated to be 43.7518mA~43.7521mA, which does not exceed the upper limit value of the electric shock current. Figure 5 It can be seen that within 0.1ms after the fault, the instantaneous value of the fault current quickly dropped to 0.183mA, which is within the safe current range for the human body.

[0105] Example 4, reference Figure 6-Figure 8 Based on the above embodiment, another application example of a safety optimization method for real-life practical training of live grid operations is provided.

[0106] See also Figure 6-Figure 8, which is the voltage and current waveform of the live working real-type training system of the present invention when the human body electric shock resistance is 500Ω, the training line length is 1km; the single-phase distributed capacitance of the training line to the ground is 0.002uf; the single-phase capacitance value of the capacitor is determined to be 0.2uf; the upper limit value of the human body resistance is 3000Ω, and the lower limit value is 500Ω; the upper limit value of the human body electric shock current is 50mA; the rated voltage of the training line is 10kV; the upper limit value of the power supply voltage is determined according to the rated phase voltage of the system, the single-phase capacitance reactance of the three-phase capacitor, the upper and lower limits of the human body resistance, and the upper limit value of the human body electric shock current. The upper limit value of the adjustable power supply voltage is further calculated to be 699V. Therefore, the adjustable power supply voltage is selected to be 100V, and the single-phase reactor of the three-phase series reactor is calculated to be 49.78H; the human body electric shock current range is calculated to be 44.7179mA~44.7181mA, which does not exceed the upper limit value of the electric shock current. By Figure 8 It can be seen that within 0.1ms after the fault, the instantaneous value of the fault current quickly dropped to 0.239mA, which is within the safe current range for the human body.

[0107] Example 5. The above is a schematic scheme of a safety optimization method for real-life training of live-line working on a power grid. It should be noted that the technical scheme of the device and system for real-life training safety optimization of live-line working on a power grid and the technical scheme of the above-mentioned safety optimization method for real-life training of live-line working on a power grid are based on the same concept. For details not described in detail in the technical scheme of the device and system for real-life training safety optimization of live-line working on a power grid in this embodiment, please refer to the description of the technical scheme of the above-mentioned technical scheme for real-life training safety optimization of live-line working on a power grid.

[0108] like Figure 9 As shown, this embodiment also provides a safety optimization device for real-life training of live grid operations, including:

[0109] A first terminal of the three-phase adjustable power supply 1 is grounded, and a second terminal of the three-phase adjustable power supply 1 is connected to a power switch 2;

[0110] A first end of the power switch 2 is connected to a three-phase adjustable power supply 1, and a second end of the power switch 2 is connected to a three-phase transformer 3;

[0111] A first end of the three-phase transformer 3 is connected to the power switch 2, and a second end of the three-phase transformer 3 is connected to the three-phase series reactor 4;

[0112] The first end of the three-phase series reactor 4 is connected to the transformer 3, and the second end of the three-phase series reactor 6 is connected to the training circuit 5;

[0113] The first end of the training circuit is connected to the three-phase series reactor 6;

[0114] The capacitor is a three-phase capacitor 5 , a first end of the capacitor 5 is connected between the three-phase series reactor 6 and the training circuit, and a second end of the capacitor 5 is short-circuited and grounded.

[0115] This embodiment also provides a safety optimization system for real-life practical training of live grid operations, including:

[0116] The first acquisition module is used to obtain the training environment and equipment parameters, and calculate the single-phase-to-ground distributed capacitance value of the training circuit based on the parameters;

[0117] A second acquisition module is used to obtain a single-phase capacitance value parameter of the three-phase capacitor according to the distributed capacitance value;

[0118] The third acquisition module is used to obtain parameters related to human electric shock;

[0119] A first calculation module is used to determine an upper limit value of the power supply voltage based on the target rated phase voltage, the distributed capacitance value, the single-phase capacitance value parameters and the acquired human body electric shock related parameters;

[0120] A second calculation module is used to set a preliminary power supply voltage value and calculate a single-phase reactance value of the three-phase series reactor based on the power supply voltage value;

[0121] The third calculation module is used to calculate the electric shock current value when the human body is electrocuted in combination with the single-phase reactance value, and determine whether to adjust the power supply voltage value based on the electric shock current value until it meets safety requirements.

[0122] This embodiment also provides a computer device suitable for safety optimization of real-life practical training for live working on a power grid, including: a memory and a processor; the memory is used to store computer-executable instructions, and the processor is used to execute computer-executable instructions to implement the safety optimization method for real-life practical training for live working on a power grid proposed in the above embodiment.

[0123] This embodiment also provides a storage medium on which a computer program is stored. When the program is executed by a processor, the safety optimization method for implementing real-life practical training for live grid operations as proposed in the above embodiment is implemented.

[0124] The storage medium proposed in this embodiment and the safety optimization method for realizing real-life practical training of live grid operations proposed in the above embodiment belong to the same inventive concept. Technical details not fully described in this embodiment can be found in the above embodiment, and this embodiment has the same beneficial effects as the above embodiment.

[0125] Through the above description of the implementation methods, those skilled in the art can clearly understand that the present invention can be implemented with the help of software and necessary general hardware, and of course can also be implemented by hardware. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory (FLASH), hard disk or optical disk, etc., including a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods of various embodiments of the present invention.

[0126] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A safety optimization method for real-life training of live-line working in a power grid, characterized in that: include: Obtaining training environment and equipment parameters, and calculating a single-phase-to-ground distributed capacitance value of a training circuit based on the parameters; Obtaining a single-phase capacitance value parameter of the three-phase capacitor according to the distributed capacitance value; Obtain parameters related to human electric shock; Determining an upper limit value of the power supply voltage based on the target rated phase voltage, the distributed capacitance value, the single-phase capacitance value parameter, and the acquired human body electric shock related parameters; Setting a preliminary power supply voltage value, and calculating a single-phase reactance value of a three-phase series reactor based on the power supply voltage value; Combined with the single-phase reactance value, the electric shock current value when the human body is electrocuted is calculated, and based on the electric shock current value, it is determined whether to adjust the power supply voltage value until it meets safety requirements.

2. A safety optimization method for real-life training of live grid working according to claim 1, characterized in that: Obtain parameters related to human electric shock, including: Obtain human body resistance parameters, specifically, the upper and lower limits of human body resistance; Obtain human body electric shock parameters, specifically, the upper limit of human body electric shock current.

3. A safety optimization method for real-life training of live grid working according to claim 2, characterized in that: The preliminary power supply voltage value is set to any value that is smaller than the upper limit value of the power supply voltage.

4. A safety optimization method for real-life training of live grid working according to claim 3, characterized in that: The single-phase reactance value of the three-phase series reactor is calculated based on the power supply voltage value, including: Calculate the deviation ratio between the power supply voltage and the rated voltage; Calculate and multiply the deviation ratio by the capacitive reactance of the capacitor, and take the absolute value to obtain the single-phase reactance value.

5. A safety optimization method for real-life training of live grid working according to claim 4, characterized in that: Determining an upper limit of the power supply voltage based on the target rated phase voltage, the distributed capacitance value, the single-phase capacitance value parameter, and the acquired human body electric shock related parameters includes: The upper limit of the power supply voltage is calculated based on the target rated phase voltage, distributed capacitance value, single-phase capacitance value parameters, upper and lower limits of human body resistance, and upper limit of human body electric shock current, which is expressed as: Among them, U smax is the upper limit of the power supply voltage, min() is the minimum value function; I th is the preset upper limit of the electric shock current for human body; X C is the single-phase capacitance reactance of the three-phase capacitor; U e is the target rated phase voltage of the system; R hmax is the upper limit of human body resistance; R hmin It is the lower limit of human body resistance.

6. A safety optimization method for real-life training of live grid working according to claim 5, characterized in that: Calculate the electric shock current value when a person is electrocuted by a human body by combining the single-phase reactance value, including: The electric shock current is calculated by taking the upper and lower limits of human body resistance into account through the modulo function, combining the single-phase reactance and the single-phase capacitance reactance, and expressed as: Among them, I g The human body resistance is R h The electric shock current when T is the single-phase reactance value of the three-phase series reactor; X C is the single-phase capacitance reactance of the three-phase capacitor; U s is the power supply voltage value.

7. A safety optimization method for real-life training of live grid working according to claim 6, characterized in that: Based on the electric shock current value, determine whether to adjust the power supply voltage value until it meets safety requirements, including: If the electric shock current exceeds the upper limit of the human body electric shock current, the set initial power supply voltage value is reduced, and the electric shock current value when the human body is electric shocked is calculated cyclically until the electric shock current does not exceed the upper limit of the human body electric shock current; If the electric shock current does not exceed the upper limit of the human body electric shock current, the safety optimization ends.

8. A safety optimization device for real-life training of live-line working on a power grid, applied to the method according to any one of claims 1 to 7, characterized in that: include: A first terminal of the three-phase adjustable power supply is grounded, and a second terminal of the three-phase adjustable power supply is connected to a power switch; A first end of the power switch is connected to a three-phase adjustable power supply, and a second end of the power switch is connected to a three-phase transformer; The first end of the three-phase transformer is connected to the power switch, and the second end of the three-phase transformer is connected to the three-phase series reactor; The first end of the three-phase series reactor is connected to the transformer, and the second end of the three-phase series reactor is connected to the training circuit; The first end of the training circuit is connected to a three-phase series reactor; The capacitor is a three-phase capacitor, the first end of the capacitor is connected between the three-phase series inductor and the training line, and the second end of the capacitor is short-circuited and grounded.

9. A computer device comprising: memory and processor; The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions. When the computer-executable instructions are executed by the processor, the steps of the safety optimization method for real-life practical training of live grid operations as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the steps of the safety optimization method for real-life practical training of live grid operations as described in any one of claims 1 to 7.

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