Load cluster power utilization safety active defense method

Abstract

The invention discloses an active defense method for power utilization safety of a load cluster. The active defense method comprises the following steps: setting load power utilization constraint conditions including power utilization safety constraints; initializing algorithm parameters; determining a constraint type of the optimization problem; solving a target function {Jtemp, Jloss}, and judging whether to quit the algorithm or not; if the result meets an exit condition, obtaining a Pareto optimal solution, otherwise, skipping to the next step; and performing optimization, judging a stopping condition, if the condition is met, ending the algorithm, and otherwise, skipping to the previous step. According to the method, the problem of a power system safety checking method of load side power utilization safety is considered, and system safety active defense of a load side power utilization safety life model can be realized, so that the problem of neglecting the power utilization safety of the load side in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of power systems, and in particular to an active defense method for power safety of load clusters. Background Art

[0002] Power system load safety verification is a crucial research direction in the field of power system engineering. Its core goal is to ensure that the power system can operate stably and reliably under various working conditions. Power system load safety verification is the process of evaluating and verifying the balance between system load and power supply, aiming to prevent abnormal conditions such as overload and overvoltage, and ensure that the power system can effectively respond to various external and internal changes. With the continuous expansion of the scale of power systems and the growth of electricity demand, load safety verification has become a key issue in power system planning, design and operation. The study of load safety verification not only involves the static and dynamic stability analysis of power systems, but also needs to take into account the flexibility, robustness and ability of the system to cope with external disturbances. In power systems, load safety verification also needs to take into account different types of loads, including industrial, commercial and residential loads, as well as the access of new energy sources.

[0003] The introduction of new technologies, such as renewable energy and smart grids, has increased the complexity of power systems, so the research on load safety verification also needs to be continuously updated and improved. Researchers are committed to developing more accurate and efficient load models, as well as improving load forecasting and scheduling methods, so as to better ensure the operational stability and reliability of power systems. With the current society's continuous pursuit of clean energy and sustainable development, the research on power system load safety verification also needs to take into account the large-scale integration of renewable energy and the management of distributed energy. This poses more challenges to researchers, such as rationally planning the power system's generation, transmission and distribution structure, and formulating corresponding load management strategies.

[0004] However, there is still a lack of relevant research on the safety of load power consumption during load management. Existing technologies and research all consider safety issues from the system side, while ignoring the safety of power consumption on the load side. How to pay attention to the safety of load power consumption and ensure safety and reliability during load management is of great significance to the development of new power systems and is also an urgent need of the current market.

[0005] In the existing technical solutions, the safety issues of power system load management are mainly concentrated on the system side, that is, considering the safety issues of transmission and distribution lines and equipment, and ensuring that the power system can operate stably and reliably under various working conditions through system safety verification. The power system safety verification considers the influence of various constraints including line safety verification. The planning goal is to minimize the economic cost based on fuel costs. As for the safety of electricity use on the load side, the power system safety verification currently does not take it into account, so active defense cannot be achieved.

[0006] The defects of the existing technical solutions are: (1) The existing technical solutions do not consider the safety of electricity use on the load side during the power system safety verification process, so the safety of electricity use on the load side cannot be guaranteed during the verification process.

[0007] (2) In the existing technical solutions, the load-side power safety life model is not modeled during the power system optimization and dispatching process. Therefore, it is impossible to achieve active defense for the power safety of the load cluster and avoid safety problems in the power consumption on the load side. Summary of the invention

[0008] The purpose of the present invention is to solve the shortcomings of the prior art and propose an active defense method for power safety of load clusters. The method takes into account the problem of power system safety verification method for load-side power safety and can realize system safety active defense of the load-side power safety life model to solve the problem of ignoring the load-side power safety in the prior art.

[0009] The present invention

[0010] A method for active defense of power safety of a load cluster of the present invention comprises the following steps:

[0011] Set load power consumption constraints;

[0012] Initialize algorithm parameters;

[0013] Determine the type of constraints in the optimization problem, including linear or equality constraints;

[0014] Solve the objective function according to the load power consumption constraint conditions, obtain the power command value assigned to each load, and determine whether to exit the algorithm. If the Pareto optimal solution is obtained, the exit condition is met, and the power of each load is controlled according to the power command value; if the Pareto optimal solution is not obtained, jump to the next step;

[0015] The power command value assigned to each load is optimized according to the algorithm parameters and constraint type, and the minimum value of the load power temperature rise target value and the load aging health loss degree in the objective function is used as the termination condition. If the termination condition is met, the algorithm is terminated, otherwise it jumps to the previous step to solve the objective function again.

[0016] Preferably, when the constraint type selected when determining the optimization problem is motor load, when only voltage is applied, the relationship between the electric field and the breakdown time is represented by an exponential model EM:

[0017]

[0018] Where E is the field strength, α is the breakdown rate, E0 and n are constants obtained by fitting;

[0019] When only thermal stress is applied:

[0020]

[0021] In the formula: -1 / T is the abscissa, lnL is the ordinate, and -B is the slope of the curve;

[0022] Combining the above formula with the EM model, we can get the electrothermal aging model:

[0023]

[0024] Where α is the thermal aging rate, T is the absolute temperature, the 0 subscript indicates the initial value, the t subscript indicates the value at temperature T, B is a constant, T' is the defined temperature expression, and n0 and bET are both constants.

[0025] Preferably, when solving the objective function to obtain the power command value assigned to each load, the objective function {Jtemp, Jloss} needs to be optimized:

[0026]

[0027] Jtemp is the target value of load power temperature rise; Tavg represents the average temperature, and Tk represents the temperature at the kth moment;

[0028] The aging health loss degree is defined using the electric-thermal combined aging model:

[0029]

[0030] Where Jloss represents the load aging health loss; α is the thermal aging rate, T is the absolute temperature, the 0 subscript represents the initial value, the t subscript represents the value at temperature T, B is a constant, and T' is the defined temperature expression.

[0031] Preferably, when the load power consumption constraint condition is the output constraint of the conventional generator set, the power generation power of the i-th conventional generator set must meet the upper and lower rated threshold limits, and the output ramp rate of the generator set must be constrained by a threshold value;

[0032] When the load power consumption constraint is a power balance constraint, for all conventional generators and new energy generators in the system, their power generation is balanced with the predicted load power and system network loss in the system;

[0033] When the load power consumption constraint condition is the unit reserve constraint, the total upward regulation reserve capacity in the system is greater than the required total upward regulation load power, and the total downward regulation reserve capacity is greater than the required total downward regulation load power; for the i-th generator set, its upward regulation reserve capacity is less than the maximum upward regulation reserve capacity, the current power plus the upward regulation reserve capacity is less than its maximum power limit, its downward regulation reserve capacity is less than the maximum downward regulation reserve capacity, and the current power minus the downward regulation reserve capacity is greater than its minimum power limit;

[0034] When the load power consumption constraint is a spinning reserve constraint, in order to meet the N-1 reserve constraint, the total reserve power of the system should be greater than the maximum load power plus the power of any generator; the reserve capacity of the i-th generator should be the minimum value of the i-th generator's upward ramp power per unit time and its maximum power minus its current power;

[0035] When the load power consumption constraint is a line safety constraint, the system line loss must be less than the limit value in all scenarios to be considered;

[0036] When the load power consumption constraint condition is the load power consumption safety constraint, it is necessary to consider that high load operation will increase the probability of load power consumption safety failure:

[0037]

[0038] where η i 0 is the probability of safety failure obtained by online identification of load power safety, P D is the current power of the load, P DM is the maximum rated power of the load; in the safety check, the following constraints should be met:

[0039] η i ≤η seti ;

[0040] where η set It is the power safety critical value set according to the importance of the load type.

[0041] The present invention also discloses a load cluster power safety active defense system, comprising:

[0042] Load power consumption constraint setting module is used to adapt to various working conditions such as conventional generator set output, power balance, unit standby, spinning standby, line safety and load power consumption safety;

[0043] Constraint type selection module: used to determine whether the optimization problem includes linear or equality constraints;

[0044] Judgment and solution module: used to solve the objective function to obtain the power command value assigned to each load, and determine whether to exit the algorithm:

[0045] If the Pareto optimal solution is obtained, the exit condition is met, and the power of each load is controlled according to the power command value;

[0046] If the Pareto optimal solution is not obtained, the power command value assigned to each load is optimized according to the algorithm parameters and constraint type, and the minimum value of the load power temperature rise target value and the load aging health loss degree in the objective function is used as the termination condition. If the termination condition is met, the algorithm is terminated, otherwise jump to the previous step to solve the objective function again.

[0047] Preferably, when the load power consumption constraint condition setting module selects the load power consumption constraint condition as the conventional generator set output constraint, the power generation power of the i-th conventional generator set must meet the upper and lower rated threshold limits, and the output ramp rate of the generator set must be constrained by a threshold value;

[0048] When the load power consumption constraint condition setting module selects the load power consumption constraint condition as the power balance constraint, for all conventional generator sets and new energy generator sets in the system, their power generation power is balanced with the predicted load power in the system and the system network loss;

[0049] When the load power consumption constraint condition setting module selects the load power consumption constraint condition as the unit reserve constraint, the total upward adjustment reserve capacity in the system is greater than the required total upward adjustment load power, and the total downward adjustment reserve capacity is greater than the required total downward adjustment load power; for the i-th generator set, its upward adjustment reserve capacity is less than the maximum upward adjustment reserve capacity, the current power plus the upward adjustment reserve capacity is less than its maximum power limit, its downward adjustment reserve capacity is less than the maximum downward adjustment reserve capacity, and the current power minus the downward adjustment reserve capacity is greater than its minimum power limit;

[0050] When the load power constraint condition setting module selects the rotating reserve constraint as the load power constraint, in order to meet the N-1 reserve constraint, the total reserve power of the system should be greater than the maximum load power plus the power of any generator; the reserve capacity of the i-th generator should be the minimum value of the i-th generator's upward ramp power per unit time and its maximum power minus its current power;

[0051] When the load power consumption constraint condition setting module selects the load power consumption constraint condition as the line safety constraint, the line loss of the system must be less than the limit value in all scenarios to be considered;

[0052] When the load power consumption constraint condition setting module selects the load power consumption constraint condition as the load power consumption safety constraint, it is necessary to consider that high load operation will increase the probability of load power consumption safety failure:

[0053]

[0054] where η i 0 is the probability of safety failure obtained by online identification of load power safety, P D is the current power of the load, P DM is the maximum rated power of the load; in the safety check, the following constraints should be met:

[0055] η i ≤η seti ;

[0056] where η set It is the power safety critical value set according to the importance of the load type.

[0057] Preferably, when the constraint type selection module determines that the constraint type in the optimization problem is motor load, when only voltage is applied, the relationship between the electric field and the breakdown time is represented by an exponential model EM:

[0058]

[0059] Where E is the field strength, α is the breakdown rate, E0 and n are constants obtained by fitting;

[0060] When only thermal stress is applied:

[0061]

[0062] In the formula: -1 / T is the abscissa, lnL is the ordinate, and -B is the slope of the curve;

[0063] Combining the above formula with the EM model, we can get the electrothermal aging model:

[0064]

[0065] Where α is the thermal aging rate, T is the absolute temperature, the 0 subscript indicates the initial value, the t subscript indicates the value at temperature T, B is a constant, T' is the defined temperature expression, and n0 and bET are both constants.

[0066] Preferably, when the judgment and solution module solves the objective function to obtain the power command value assigned to each load, it is necessary to optimize the objective function {Jtemp, Jloss}:

[0067]

[0068] Jtemp is the target value of load power temperature rise; Tavg represents the average temperature, and Tk represents the temperature at the kth moment;

[0069] The aging health loss degree is defined using the electric-thermal combined aging model:

[0070]

[0071] Where Jloss represents the load aging health loss; α is the thermal aging rate, T is the absolute temperature, the 0 subscript represents the initial value, the t subscript represents the value at temperature T, B is a constant, and T' is the defined temperature expression.

[0072] The present invention also discloses a computer-readable storage medium for storing a computer program, which, when executed by a processor, implements the active defense method for power safety of a load cluster according to any one of claims 1 to 4.

[0073] The advantages and technical effects of the present invention are:

[0074] The present invention focuses on an economic dispatch method for an electric power system that considers load power safety constraints in constraint conditions; adds a load electro-thermal aging power safety life model to an electric power system optimization dispatch model to achieve active defense against potential power safety failures of load clusters within the system; and the present invention is the first to consider load power safety constraints in the constraint conditions of an economic dispatch method for an electric power system; and the present invention can evaluate the loss of load power safety life in the optimization dispatch of an electric power system, thereby achieving active defense against the power safety of load clusters. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] Figure 1 The figure is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0076] The embodiments of the invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the invention, and cannot be understood as limiting the invention.

[0077] A method for active defense of power safety of a load cluster of the present invention comprises the following steps:

[0078] Set load power consumption constraints;

[0079] Initialize algorithm parameters;

[0080] Determine the type of constraints in the optimization problem, including linear or equality constraints;

[0081] Solve the objective function according to the load power consumption constraint conditions, obtain the power command value assigned to each load, and determine whether to exit the algorithm. If the Pareto optimal solution is obtained, the exit condition is met, and the power of each load is controlled according to the power command value; if the Pareto optimal solution is not obtained, jump to the next step;

[0082] The power command value assigned to each load is optimized according to the algorithm parameters and constraint type, and the minimum value of the load power temperature rise target value and the load aging health loss degree in the objective function is used as the termination condition. If the termination condition is met, the algorithm is terminated, otherwise it jumps to the previous step to solve the objective function again.

[0083] Preferably, when the constraint type selected when determining the optimization problem is motor load, when only voltage is applied, the relationship between the electric field and the breakdown time is represented by an exponential model EM:

[0084]

[0085] Where E is the field strength, α is the breakdown rate, E0 and n are constants obtained by fitting;

[0086] When only thermal stress is applied:

[0087]

[0088] In the formula: -1 / T is the abscissa, lnL is the ordinate, and -B is the slope of the curve;

[0089] Combining the above formula with the EM model, we can get the electrothermal aging model:

[0090]

[0091] Where α is the thermal aging rate, T is the absolute temperature, the 0 subscript indicates the initial value, the t subscript indicates the value at temperature T, B is a constant, T' is the defined temperature expression, and n0 and bET are both constants.

[0092] Preferably, when solving the objective function to obtain the power command value assigned to each load, the objective function {Jtemp, Jloss} needs to be optimized:

[0093]

[0094] Jtemp is the target value of load power temperature rise; Tavg represents the average temperature, and Tk represents the temperature at the kth moment;

[0095] The aging health loss degree is defined using the electric-thermal combined aging model:

[0096]

[0097] Where Jloss represents the load aging health loss; α is the thermal aging rate, T is the absolute temperature, the 0 subscript represents the initial value, the t subscript represents the value at temperature T, B is a constant, and T' is the defined temperature expression.

[0098] Preferably, when the load power consumption constraint condition is the output constraint of the conventional generator set, the power generation power of the i-th conventional generator set must meet the upper and lower rated threshold limits, and the output ramp rate of the generator set must be constrained by a threshold value;

[0099] When the load power consumption constraint is a power balance constraint, for all conventional generators and new energy generators in the system, their power generation is balanced with the predicted load power and system network loss in the system;

[0100] When the load power consumption constraint condition is the unit reserve constraint, the total upward regulation reserve capacity in the system is greater than the required total upward regulation load power, and the total downward regulation reserve capacity is greater than the required total downward regulation load power; for the i-th generator set, its upward regulation reserve capacity is less than the maximum upward regulation reserve capacity, the current power plus the upward regulation reserve capacity is less than its maximum power limit, its downward regulation reserve capacity is less than the maximum downward regulation reserve capacity, and the current power minus the downward regulation reserve capacity is greater than its minimum power limit;

[0101] When the load power consumption constraint is a spinning reserve constraint, in order to meet the N-1 reserve constraint, the total reserve power of the system should be greater than the maximum load power plus the power of any generator; the reserve capacity of the i-th generator should be the minimum value of the i-th generator's upward ramp power per unit time and its maximum power minus its current power;

[0102] When the load power consumption constraint is a line safety constraint, the system line loss must be less than the limit value in all scenarios to be considered;

[0103] When the load power consumption constraint condition is the load power consumption safety constraint, it is necessary to consider that high load operation will increase the probability of load power consumption safety failure:

[0104]

[0105] where η i 0 is the probability of safety failure obtained by online identification of load power safety, P D is the current power of the load, P DM is the maximum rated power of the load; in the safety check, the following constraints should be met:

[0106] η i ≤η seti ;

[0107] where η setIt is the power safety critical value set according to the importance of the load type.

[0108] The present invention also discloses a load cluster power safety active defense system, comprising:

[0109] Load power consumption constraint setting module is used to adapt to various working conditions such as conventional generator set output, power balance, unit standby, spinning standby, line safety and load power consumption safety;

[0110] Constraint type selection module: used to determine whether the optimization problem includes linear or equality constraints;

[0111] Judgment and solution module: used to solve the objective function to obtain the power command value assigned to each load, and determine whether to exit the algorithm:

[0112] If the Pareto optimal solution is obtained, the exit condition is met, and the power of each load is controlled according to the power command value;

[0113] If the Pareto optimal solution is not obtained, the power command value assigned to each load is optimized according to the algorithm parameters and constraint type, and the minimum value of the load power temperature rise target value and the load aging health loss degree in the objective function is used as the termination condition. If the termination condition is met, the algorithm is terminated, otherwise jump to the previous step to solve the objective function again.

[0114] Preferably, when the load power consumption constraint condition setting module selects the load power consumption constraint condition as the conventional generator set output constraint, the power generation power of the i-th conventional generator set must meet the upper and lower rated threshold limits, and the output ramp rate of the generator set must be constrained by a threshold value;

[0115] When the load power consumption constraint condition setting module selects the load power consumption constraint condition as the power balance constraint, for all conventional generator sets and new energy generator sets in the system, their power generation power is balanced with the predicted load power in the system and the system network loss;

[0116] When the load power consumption constraint condition setting module selects the load power consumption constraint condition as the unit reserve constraint, the total upward adjustment reserve capacity in the system is greater than the required total upward adjustment load power, and the total downward adjustment reserve capacity is greater than the required total downward adjustment load power; for the i-th generator set, its upward adjustment reserve capacity is less than the maximum upward adjustment reserve capacity, the current power plus the upward adjustment reserve capacity is less than its maximum power limit, its downward adjustment reserve capacity is less than the maximum downward adjustment reserve capacity, and the current power minus the downward adjustment reserve capacity is greater than its minimum power limit;

[0117] When the load power constraint condition setting module selects the rotating reserve constraint as the load power constraint, in order to meet the N-1 reserve constraint, the total reserve power of the system should be greater than the maximum load power plus the power of any generator; the reserve capacity of the i-th generator should be the minimum value of the i-th generator's upward ramp power per unit time and its maximum power minus its current power;

[0118] When the load power consumption constraint condition setting module selects the load power consumption constraint condition as the line safety constraint, the line loss of the system must be less than the limit value in all scenarios to be considered;

[0119] When the load power consumption constraint condition setting module selects the load power consumption constraint condition as the load power consumption safety constraint, it is necessary to consider that high load operation will increase the probability of load power consumption safety failure:

[0120]

[0121] where η i 0 is the probability of safety failure obtained by online identification of load power safety, P D is the current power of the load, P DM is the maximum rated power of the load; in the safety check, the following constraints should be met:

[0122] η i ≤η seti ;

[0123] where η set It is the power safety critical value set according to the importance of the load type.

[0124] Preferably, when the constraint type selection module determines that the constraint type in the optimization problem is motor load, when only voltage is applied, the relationship between the electric field and the breakdown time is represented by an exponential model EM:

[0125]

[0126] Where E is the field strength, α is the breakdown rate, E0 and n are constants obtained by fitting;

[0127] When only thermal stress is applied:

[0128]

[0129] In the formula: -1 / T is the abscissa, lnL is the ordinate, and -B is the slope of the curve;

[0130] Combining the above formula with the EM model, we can get the electrothermal aging model:

[0131]

[0132] Where α is the thermal aging rate, T is the absolute temperature, the 0 subscript indicates the initial value, the t subscript indicates the value at temperature T, B is a constant, T' is the defined temperature expression, and n0 and bET are both constants.

[0133] Preferably, when the judgment solving module solves the objective function to obtain the power command value assigned to each load, it is necessary to optimize the solving objective function {Jtemp, Jloss}:

[0134]

[0135] Jtemp is the target value of load power temperature rise; Tavg represents the average temperature, and Tk represents the temperature at the kth moment;

[0136] The aging health loss degree is defined using the electric-thermal combined aging model:

[0137]

[0138] Where Jloss represents the load aging health loss; α is the thermal aging rate, T is the absolute temperature, the 0 subscript represents the initial value, the t subscript represents the value at temperature T, B is a constant, and T' is the defined temperature expression.

[0139] The present invention also discloses a computer-readable storage medium for storing a computer program, which, when executed by a processor, implements the active defense method for power safety of a load cluster according to any one of claims 1 to 4.

[0140] In order to more clearly describe the specific implementation mode of the present invention, an embodiment is provided below:

[0141] The present invention provides a load cluster power safety active defense method. In order to achieve safe power consumption of the load cluster during the load control process, it is necessary to conduct electric and thermal joint modeling of the aging process of each controlled load. Based on the health monitoring information of each controlled load, the power of each controlled load is reasonably allocated to achieve the safe power consumption active defense technology of the entire load cluster with the goal of improving the overall health of the load cluster and optimizing the comprehensive economic benefits.

[0142] The present invention proposes a power system safety verification method that takes into account the safety of load-side electricity use in the new power system load management system, and realizes the consideration of load power safety in the economic dispatch process. In addition, a system safety active defense method that takes into account the load-side electricity safety life model is proposed, which can use the load electric thermal aging model to achieve system safety active defense through optimized dispatching.

[0143] Finally, all the unexplained parts of the invention adopt mature products and mature technical means in the existing technology.

[0144] In the description of this specification, reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in the embodiment or example of the invention.

[0145] Although embodiments of the invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A method for active defense of power safety of load clusters, characterized in that: The following steps are involved: Set load power consumption constraints; Initialize algorithm parameters; Determine the type of constraints in the optimization problem, including linear or equality constraints; Solve the objective function according to the load power consumption constraint condition, obtain the power command value assigned to each load, and judge whether to exit the algorithm. If the Pareto optimal solution is obtained, the exit condition is met, and the power of each load is controlled according to the power command value; if the Pareto optimal solution is not obtained, jump to the next step; The power command value assigned to each load is optimized according to the algorithm parameters and the constraint type, and the minimum value of the load power temperature rise target value and the load aging health loss degree in the objective function is used as the termination condition. If the termination condition is met, the algorithm is terminated, otherwise jump to the previous step to solve the objective function again.

2. The method for active defense of power safety of load cluster according to claim 1, characterized in that: When the constraint type selected in determining the optimization problem is motor load, when only voltage is applied, the relationship between the electric field and the breakdown time is expressed by the exponential model EM: Where E is the field strength, α is the breakdown rate, E0 and n are constants obtained by fitting; When only thermal stress is applied: In the formula: -1 / T is the abscissa, lnL is the ordinate, and -B is the slope of the curve; Combining the above formula with the EM model, we can get the electrothermal aging model: Where α is the thermal aging rate, T is the absolute temperature, the 0 subscript indicates the initial value, the t subscript indicates the value at temperature T, B is a constant, T' is the defined temperature expression, and n0 and bET are both constants.

3. The method for active defense of power safety of load cluster according to claim 1, characterized in that: When solving the objective function to obtain the power command value assigned to each load, it is necessary to optimize the objective function {Jtemp, Jloss}: Jtemp is the target value of load power temperature rise; Tavg represents the average temperature, and Tk represents the temperature at the kth moment; The aging health loss degree is defined using the electric-thermal combined aging model: Where Jloss represents the load aging health loss; α is the thermal aging rate, T is the absolute temperature, the 0 subscript represents the initial value, the t subscript represents the value at temperature T, B is a constant, and T' is the defined temperature expression.

4. The method for active defense of power safety of load cluster according to claim 1, characterized in that: When the load power consumption constraint condition is the output constraint of the conventional generator set, the power generation power of the i-th conventional generator set must meet the upper and lower rated threshold limits, and the output ramp rate of the generator set must be constrained by a threshold value; When the load power consumption constraint condition is a power balance constraint, for all conventional generator sets and new energy generator sets in the system, their power generation is balanced with the predicted load power and system network loss in the system; When the load power consumption constraint condition is the unit reserve constraint, the total upward regulation reserve capacity in the system is greater than the required total upward regulation load power, and the total downward regulation reserve capacity is greater than the required total downward regulation load power; For the i-th generator set, its upward regulation reserve capacity is less than the maximum upward regulation reserve capacity, the current power plus the upward regulation reserve capacity is less than its maximum power limit, its downward regulation reserve capacity is less than the maximum downward regulation reserve capacity, and the current power minus the downward regulation reserve capacity is greater than its minimum power limit; When the load power consumption constraint condition is a spinning reserve constraint, in order to meet the N-1 reserve constraint, the total reserve power of the system should be greater than the maximum load power plus the power of any generator; the reserve capacity of the i-th generator should be the minimum value of the i-th generator's upward ramp power per unit time and its maximum power minus its current power; When the load power consumption constraint condition is a line safety constraint, the line loss of the system must be less than the limit value in all scenarios to be considered; When the load power consumption constraint condition is a load power consumption safety constraint, it is necessary to consider that high load operation will increase the probability of load power consumption safety failure: where η i 0 is the probability of safety failure obtained by online identification of load power safety, P D is the current power of the load, P DM is the maximum rated power of the load; in the safety check, the following constraints should be met: or i ≤η seti ; where η set It is the power safety critical value set according to the importance of the load type.

5. An active defense system for power safety of load clusters as claimed in claim 1, characterized in that: include: Load power consumption constraint setting module is used to adapt to various working conditions such as conventional generator set output, power balance, unit standby, spinning standby, line safety and load power consumption safety; Constraint type selection module: used to determine whether the optimization problem includes linear or equality constraints; Judgment and solution module: used to solve the objective function to obtain the power command value assigned to each load, and determine whether to exit the algorithm: If the Pareto optimal solution is obtained, the exit condition is met, and the power of each load is controlled according to the power command value; If the Pareto optimal solution is not obtained, the power command value assigned to each load is optimized according to the algorithm parameters and the constraint type, and then the minimum value of the load power temperature rise target value and the load aging health loss degree in the objective function is used as the termination condition. If the termination condition is met, the algorithm is terminated, otherwise jump to the previous step to solve the objective function again.

6. The active defense system for power safety of load clusters according to claim 5 is characterized by: When the load power consumption constraint condition setting module selects the load power consumption constraint condition as the conventional generator set output constraint, the power generation power of the i-th conventional generator set must meet the upper and lower rated threshold limits, and the output ramp rate of the generator set must be constrained by a threshold value; When the load power consumption constraint condition setting module selects the load power consumption constraint condition as the power balance constraint, for all conventional generator sets and new energy generator sets in the system, their power generation is balanced with the predicted load power in the system and the system network loss; When the load power consumption constraint condition setting module selects the load power consumption constraint condition as the unit reserve constraint, the total upward adjustment reserve capacity in the system is greater than the required total upward adjustment load power, and the total downward adjustment reserve capacity is greater than the required total downward adjustment load power; For the i-th generator set, its upward regulation reserve capacity is less than the maximum upward regulation reserve capacity, the current power plus the upward regulation reserve capacity is less than its maximum power limit, its downward regulation reserve capacity is less than the maximum downward regulation reserve capacity, and the current power minus the downward regulation reserve capacity is greater than its minimum power limit; When the load power consumption constraint condition setting module selects the load power consumption constraint condition as the rotating reserve constraint, in order to meet the N-1 reserve constraint, the total reserve power of the system should be greater than the maximum load power plus the power of any generator; the reserve capacity of the i-th generator should be the minimum value of the i-th generator's upward adjustment climbing power per unit time and its maximum power minus its current power; When the load power consumption constraint condition setting module selects the load power consumption constraint condition as the line safety constraint, the line loss of the system must be less than the limit value in all scenarios to be considered; When the load power consumption constraint condition setting module selects the load power consumption constraint condition as the load power consumption safety constraint, it is necessary to consider that high load operation will increase the probability of load power consumption safety failure: where η i 0 is the probability of safety failure obtained by online identification of load power safety, P D is the current power of the load, P DM is the maximum rated power of the load; in the safety check, the following constraints should be met: or i ≤η seti ; where η set It is the power safety critical value set according to the importance of the load type.

7. The active defense system for power safety of load clusters according to claim 5 is characterized by: When the constraint type selection module determines that the constraint type in the optimization problem is motor load, when only voltage is applied, the exponential model EM is used to represent the relationship between the electric field and the breakdown time: Where E is the field strength, α is the breakdown rate, E0 and n are constants obtained by fitting; When only thermal stress is applied: In the formula: -1 / T is the abscissa, lnL is the ordinate, and -B is the slope of the curve; Combining the above formula with the EM model, we can get the electrothermal aging model: Where α is the thermal aging rate, T is the absolute temperature, the 0 subscript indicates the initial value, the t subscript indicates the value at temperature T, B is a constant, T' is the defined temperature expression, and n0 and bET are both constants.

8. The active defense system for power safety of load clusters according to claim 5 is characterized by: When the judgment and solution module solves the objective function to obtain the power command value assigned to each load, it is necessary to optimize the objective function {Jtemp, Jloss}: Jtemp is the target value of load power temperature rise; Tavg represents the average temperature, and Tk represents the temperature at the kth moment; The aging health loss degree is defined using the electric-thermal combined aging model: Where Jloss represents the load aging health loss; α is the thermal aging rate, T is the absolute temperature, the 0 subscript represents the initial value, the t subscript represents the value at temperature T, B is a constant, and T' is the defined temperature expression.

9. A computer-readable storage medium for storing a computer program, characterized in that: When the computer program is executed by a processor, the load cluster power safety active defense method described in any one of claims 1 to 4 is implemented.

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