Dynamic optimization method and device for loading program of diesel generator of nuclear power plant

Abstract

The invention discloses a dynamic optimization method and device for a loading program of a diesel generator of a nuclear power plant, and the method comprises the following steps: recognizing an accident condition of the nuclear power plant, and determining equipment under the accident condition and corresponding equipment capacity; obtaining the working step loading capacity of each working step of the diesel generator of the nuclear power plant and availability distribution values of equipment under different accident working conditions; and according to the equipment capacity, the availability distribution value and the process step loading capacity of the equipment, generating an equipment loading list of each process step of the diesel generator under the accident condition in real time, and dynamically optimizing a loading program of the diesel generator of the nuclear power plant by utilizing the equipment loading list. According to the method, the requirements of the capacity and load characteristics of the diesel generator under the current working step are combined, the capacity of the equipment capable of being loaded in the current working step is calculated in real time, the optimal loading equipment list is generated in real time, operation of nuclear equipment of a power plant system is optimized, and the economical efficiency of the equipment is improved.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear power plant design, and in particular to a dynamic optimization method and device for a nuclear power plant diesel generator loading program. Background Art

[0002] The functional design of diesel generator sets is usually positioned to be put into use under the condition of losing all off-site power supplies and the tripping of the main generator. It supplies power to the plant power equipment to ensure the safe shutdown of the unit, reduce the risk of non-passive dedicated system action, and meet the relevant requirements of in-depth defense. Diesel generator sets can also supply power to important security equipment in nuclear power plants. The main functions include important equipment safety protection, fire safety, personnel safety and accessibility, and plant physical security functions. The specific equipment is determined according to the process system settings. After the diesel generator set is put into use, the system equipment and related support function equipment corresponding to the above functions are loaded according to the pre-set loading sequence. For diesel generators, first of all, the capacity of the diesel generator should consider the total capacity of the loading equipment, and ensure that the diesel generator can load all the required equipment under any working conditions. Therefore, the capacity of the diesel generator is often conservatively considered to be the maximum capacity, and the diesel generator is economical and reduces the equipment that needs to be loaded as much as possible; in addition, the loading equipment should be reasonably distributed in each step to avoid excessive loading in a certain step and cause additional increase in the capacity of the standby diesel generator set. However, most of the loads of nuclear power plants need to be put into operation as soon as possible. Since the diesel generator sets use a predetermined loading program, it often puts great pressure on the early working steps of the diesel generator sets, which will also affect the capacity selection of the entire diesel generator set and greatly affect the purchase cost of the diesel generator sets.

[0003] The existing patent CN113824362A discloses a hierarchical loading control method, system, storage medium and terminal for starting a diesel generator. The method comprises the following steps: for each level of loading control, a given power is sent to the frequency converter so that the frequency converter uses the given power as the set power to control the output power of the diesel generator set; when loading the diesel generator, if S M ≥S*a, continue to load the diesel generator; otherwise, adjust the set power of the inverter until S M ≥S*a, and during the adjustment period when P C2 ≤P C1 *b stops loading the diesel generator and at S M ≥S*a, the diesel generator is resumed to be loaded. This method focuses on realizing the hierarchical loading of the diesel generator, but does not solve the problem in the prior art that the loading procedure of the diesel generator set in the nuclear power plant is fixed, resulting in excessive load in the early working step of the diesel generator, which affects the capacity selection of the generator set and has high economic cost.

[0004] Existing patent CN104166092A discloses an optimization method for capacity verification of diesel generator sets in nuclear power plants. The method first determines the rated capacity of the diesel generator set according to the load capacity, and then performs capacity verification on the generator and the diesel engine respectively. The verification of the generator is carried out in accordance with the provisions of the power design manual, and the verification of the diesel engine includes the first step load capacity verification of the diesel engine and the load capacity verification of each step of the diesel engine. The method is used to verify and calculate the capacity of the diesel generator set, and assist in the selection of the unit capacity. It does not solve the problem in the prior art that the load program of the diesel generator set in the nuclear power plant is fixed, resulting in excessive load in the early working step of the diesel generator, which affects the capacity selection of the generator set and has a high economic cost.

[0005] In summary, the above two existing patents do not solve the problem in the prior art that the loading program of the diesel generator set in the nuclear power plant is fixed, resulting in excessive load in the early working steps of the diesel generator, which affects the capacity selection of the generator set and has high economic costs. Summary of the invention

[0006] Based on the above technical problems, the present invention proposes to solve the problem in the prior art that the loading program of the diesel generator set in a nuclear power plant is fixed, resulting in excessive load in the early working steps of the diesel generator, affecting the capacity selection of the generator set and causing high economic costs.

[0007] To achieve the above object, the present invention proposes a method and device for dynamically optimizing a nuclear power plant diesel generator loading program.

[0008] A dynamic optimization method for a nuclear power plant diesel generator loading program, comprising:

[0009] Identify accident conditions in nuclear power plants and determine the equipment and corresponding equipment capacity under accident conditions;

[0010] Obtain the step loading capacity of each step of the diesel generator in the nuclear power plant and the availability distribution value of the equipment under different accident conditions;

[0011] Generate the equipment loading list of each working step of the diesel generator under accident conditions in real time according to the equipment capacity, availability distribution value and working step loading capacity of the equipment;

[0012] The equipment loading list is used to dynamically optimize the loading procedures of diesel generators in nuclear power plants.

[0013] Furthermore, according to the equipment capacity, availability distribution value and step loading capacity of the equipment, an equipment loading list for each step of the diesel generator under the accident condition is generated in real time, including:

[0014] Determine the total capacity of the equipment based on the equipment capacity and the corresponding availability distribution;

[0015] Compare the total equipment capacity with the step loading capacity;

[0016] Based on the comparison results, an equipment loading list for each working step of the diesel generator under accident conditions is generated in real time.

[0017] Furthermore, the total capacity of the equipment is determined according to the equipment capacity and the corresponding availability distribution, including:

[0018] According to the equipment capacity and equipment loading priority, the equipment capacity matrix is ​​generated. The equipment capacity matrix is ​​expressed as:

[0019]

[0020] Among them, c ij represents the device capacity of the jth device in the i-th loading priority, n represents the maximum value of loading priority i, and m represents the maximum value of the device value;

[0021] According to the availability distribution value of the equipment under different accident conditions, the equipment availability distribution matrix is ​​generated. The equipment availability distribution matrix is ​​expressed as:

[0022]

[0023] Among them, a ij represents the availability distribution value of the jth device in the i-th loading priority;

[0024] The total capacity of the equipment is determined by multiplying the equipment capacity matrix by the equipment availability distribution matrix.

[0025] Furthermore, based on the comparison results, a list of equipment loading for each working step of the diesel generator under the accident condition is generated in real time. The accident condition includes N working steps.

[0026] If the comparison result shows that the total equipment capacity is less than the step loading capacity of the first step of the diesel generator, the equipment loading list of the first step includes all equipment;

[0027] If the comparison result is that the total equipment capacity is greater than the step loading capacity of the first step of the diesel generator, and less than the sum of the step loading capacities of all the steps of the diesel generator, then the loading weight of the equipment is determined, and based on the loading weight and the equipment capacity matrix, the knapsack algorithm is used to generate the equipment loading list from the first step to the i-th step in real time;

[0028] If the comparison result is that the total equipment capacity is greater than the sum of the step loading capacities of all steps of the diesel generator, the loading weight of the equipment is determined, and the equipment is loaded sequentially to the first to Nth steps according to the loading weight to generate a corresponding equipment loading list.

[0029] Furthermore, the loading weight of the equipment is determined, including:

[0030] According to the importance of each equipment to the mitigation of accident conditions, a corresponding loading weight is set for each equipment.

[0031] To achieve the same purpose as the above method, the present invention also proposes a dynamic optimization device for a nuclear power plant diesel generator loading program.

[0032] A dynamic optimization device for a nuclear power plant diesel generator loading program, comprising:

[0033] Identification module, used to identify the accident conditions of nuclear power plants and determine the equipment under the accident conditions and the corresponding equipment capacity;

[0034] An acquisition module is used to obtain the step loading capacity of each step of the diesel generator of a nuclear power plant and the availability distribution value of the equipment under different accident conditions;

[0035] A generation module is used to generate in real time an equipment loading list for each working step of a diesel generator under an accident condition according to the equipment capacity, availability distribution value and working step loading capacity of the equipment;

[0036] The optimization module is used to dynamically optimize the nuclear power plant diesel generator loading program using the equipment loading list.

[0037] Furthermore, a module is generated for:

[0038] Determine the total capacity of the equipment based on the equipment capacity and the corresponding availability distribution;

[0039] Compare the total equipment capacity with the step loading capacity;

[0040] Based on the comparison results, an equipment loading list for each working step of the diesel generator under accident conditions is generated in real time.

[0041] Furthermore, the total capacity of the equipment is determined according to the equipment capacity and the corresponding availability distribution, including:

[0042] According to the equipment capacity and equipment loading priority, the equipment capacity matrix is ​​generated. The equipment capacity matrix is ​​expressed as:

[0043]

[0044] Among them, c ij represents the device capacity of the jth device in the i-th loading priority, n represents the maximum value of loading priority i, and m represents the maximum value of the device value;

[0045] According to the availability distribution value of the equipment under different accident conditions, the equipment availability distribution matrix is ​​generated. The equipment availability distribution matrix is ​​expressed as:

[0046]

[0047] Among them, a ij represents the availability distribution value of the jth device in the i-th loading priority;

[0048] The total capacity of the equipment is determined by multiplying the equipment capacity matrix by the equipment availability distribution matrix.

[0049] Furthermore, based on the comparison results, a list of equipment loading for each working step of the diesel generator under the accident condition is generated in real time. The accident condition includes N working steps.

[0050] If the comparison result shows that the total equipment capacity is less than the step loading capacity of the first step of the diesel generator, the equipment loading list of the first step includes all equipment;

[0051] If the comparison result is that the total equipment capacity is greater than the step loading capacity of the first step of the diesel generator, and less than the sum of the step loading capacities of all the steps of the diesel generator, then the loading weight of the equipment is determined, and based on the loading weight and the equipment capacity matrix, the knapsack algorithm is used to generate the equipment loading list from the first step to the i-th step in real time;

[0052] If the comparison result is that the total equipment capacity is greater than the sum of the step loading capacities of all steps of the diesel generator, the loading weight of the equipment is determined, and the equipment is loaded sequentially to the first to Nth steps according to the loading weight to generate a corresponding equipment loading list.

[0053] Furthermore, the loading weight of the equipment is determined, including:

[0054] According to the importance of each equipment to the mitigation of accident conditions, a corresponding loading weight is set for each equipment.

[0055] Based on the above technical solution, the present invention has at least the following beneficial effects:

[0056] 1. The present invention analyzes the specific accident conditions of the nuclear power plant and the loading requirements for equipment under the accident conditions in real time, combines the capacity of the diesel generator and the load characteristics requirements in the current working step, calculates the equipment capacity that can be loaded in the current working step in real time, and gives the optimal loading equipment list in real time to optimize the operation of the nuclear equipment in the power plant system. The method and device can reduce the starting pressure of the diesel generator, make full use of the maximum capacity of the diesel generator, reduce the capacity requirements for the diesel generator, and improve the economy of the equipment.

[0057] 2. The present invention introduces the availability distribution value of the equipment under different accident conditions and calculates the total capacity of the equipment currently to be loaded by the diesel generator in real time, so as to respond to the actual power demand more accurately. When a certain equipment is unavailable under the current accident condition, the load is dynamically adjusted according to the remaining capacity of the diesel generator, thereby ensuring the power supply of key equipment, reducing resource waste and improving the efficiency of the overall system. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0059] Figure 1 A flow chart of a dynamic optimization method for a nuclear power plant diesel generator loading program according to an embodiment of the present invention;

[0060] Figure 2 Loading program logic schematics for diesel generators;

[0061] Figure 3 The present invention is a schematic diagram of a dynamic optimization device for a nuclear power plant diesel generator loading program according to an embodiment of the present invention. DETAILED DESCRIPTION

[0062] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0063] The present invention is further described in detail below in conjunction with specific embodiments. These embodiments should not be construed as limiting the scope of protection claimed by the present invention.

[0064] Example

[0065] In order to solve the problem in the prior art that the loading program of diesel generator sets in nuclear power plants is fixed, resulting in excessive load in the early working steps of diesel generators, affecting the capacity selection of generator sets and having high economic costs, the present invention proposes a dynamic optimization method and device for the loading program of diesel generators in nuclear power plants. The method and device can optimize the equipment loading list of diesel generators in real time, enable diesel generator sets to start as required, optimize the operating status of power plant systems and equipment, ensure the safe starting of diesel generators, and save the procurement capacity of diesel generator sets.

[0066] To achieve the above object, the present invention proposes a dynamic optimization method for a nuclear power plant diesel generator loading program.

[0067] like Figure 1 FIG. 4 is a flow chart of a method for dynamically optimizing a nuclear power plant diesel generator loading program according to an embodiment of the present invention. Figure 1 As shown, the method comprises the following steps:

[0068] S1, identify the accident conditions of the nuclear power plant and determine the equipment under the accident conditions and the corresponding equipment capacity.

[0069] Real-time analysis of nuclear power plant accident scenarios, weather conditions, and superimposed external events, etc., to identify the current accident conditions. Taking the emergency diesel generator of the Hualong One unit as an example, when the power supply outside the plant is lost, the load demand under the condition of loss of power supply outside the plant needs to be guaranteed, and no other external events are superimposed at this time. After judgment, it is determined to take the 0s and 5s working steps of some typical equipment of the emergency diesel generator as an example for analysis. The specific equipment and its equipment capacity information are shown in Table 1, where the code 0s represents the 0s working step and the code 5s represents the 5s working step.

[0070] Table 1 Equipment and corresponding equipment capacity under the condition of loss of external power in a specific embodiment

[0071]

[0072]

[0073] S2, obtain the step loading capacity of each step of the diesel generator in the nuclear power plant and the availability distribution value of the equipment under different accident conditions.

[0074] The availability distribution value of the equipment under different accident conditions indicates whether the equipment is available under different accident conditions. Usually, 0 indicates that the equipment is unavailable under the condition, and 1 indicates that the equipment is available under the condition. The total capacity of the current equipment can be updated in real time based on the availability distribution value to dynamically adjust the loadable equipment according to the step loading capacity.

[0075] S3, based on the equipment capacity, availability distribution value and work step loading capacity of the equipment, generates in real time the equipment loading list for each work step of the diesel generator under the accident condition.

[0076] Furthermore, according to the equipment capacity, availability distribution value and step loading capacity of the equipment, an equipment loading list for each step of the diesel generator under the accident condition is generated in real time, including:

[0077] S301, determining the total capacity of the device according to the device capacity and the corresponding availability distribution.

[0078] Furthermore, the total capacity of the equipment is determined according to the equipment capacity and the corresponding availability distribution, including:

[0079] S3011, generating a device capacity matrix according to device capacities and device loading priorities.

[0080] The equipment capacity matrix is ​​expressed as,

[0081]

[0082] Among them, c ij represents the device capacity of the jth device in the i-th loading priority, n represents the maximum value of loading priority i, and m represents the maximum value of the device value.

[0083] In this embodiment, the transpose of the device capacity matrix corresponding to Table 1 is: [7.4, 10.90, 15.2, 15.2, 14.6, 14.6, 14.6, 31, 9.7, 10.9, 14.6, 0.9, 7, 540; 560, 30, 30, 30, 30, 30, 30, 4, 4, 114, 114, 114, 90, 90]. The 0s step and 5s step are loading priorities, indicating that the device is loaded in 0s or 5s.

[0084] S3012: Generate an equipment availability distribution matrix based on the availability distribution values ​​of the equipment under different accident conditions.

[0085] The equipment availability distribution matrix is ​​expressed as,

[0086]

[0087] Among them, a ij Represents the availability distribution value of the jth device in the i-th loading priority.

[0088] S3013, perform dot multiplication of the device capacity matrix and the device availability distribution matrix to determine the total device capacity.

[0089] S302, comparing the total equipment capacity with the process step loading capacity.

[0090] S303, based on the comparison result, generate in real time an equipment loading list for each working step of the diesel generator under the accident condition.

[0091] Furthermore, based on the comparison results, an equipment loading list for each working step of the diesel generator under accident conditions is generated in real time.

[0092] The accident condition includes N working steps. If the comparison result shows that the total equipment capacity is less than the working step loading capacity of the diesel generator in the first working step, the equipment loading list of the first working step includes all equipment.

[0093] If the comparison result is that the total equipment capacity is greater than the step loading capacity of the first step of the diesel generator, and less than the sum of the step loading capacities of all the steps of the diesel generator, then the loading weight of the equipment is determined, and based on the loading weight and the equipment capacity matrix, the backpack algorithm is used to generate the equipment loading list from the first step to the i-th step in real time. Specifically, the purpose of the backpack algorithm is to find the sum of the k values ​​that maximize each step. That is, it represents the equipment loading list solution that maximizes the sum of the total weights of each step under the conditions of the given equipment capacity matrix a, the equipment availability matrix c, and the equipment weight matrix k: argmax_k(u(a,c,k)).

[0094] If the comparison result is that the total equipment capacity is greater than the sum of the step loading capacities of all steps of the diesel generator, the loading weight of the equipment is determined, and the equipment is loaded sequentially to the first to Nth steps according to the loading weight to generate a corresponding equipment loading list.

[0095] Furthermore, the loading weight of the equipment is determined, including:

[0096] According to the importance of each device to the accident condition mitigation, a corresponding loading weight is set for each device. It should be understood that different loading weights may be set for different understandings of the importance of each device to the accident condition mitigation.

[0097] Specifically, in this embodiment, it is assumed that all devices are available, and the corresponding availability distribution matrix is ​​[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1; 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]. According to step S3013, the two matrices are multiplied to determine that the total capacity of the device in this embodiment is the sum of the capacities of all devices, that is, 1998.1 kW.

[0098] Assuming that the emergency diesel generator includes two working steps, the working step capacities of the two working steps are 1040kW and 640kW respectively. Then, after comparison, it is found that the total capacity of the equipment in this embodiment is greater than the sum of the working step loading capacities of all working steps of the diesel generator. At this time, the equipment should be loaded sequentially to the first to Nth working steps according to the loading weights, and the corresponding equipment loading list is generated. In this embodiment, the loading weights of the equipment in the 0s working step in the first column of Table 1 are all set to 2, and the loading weights of the equipment in the 5s working step in the second column are all set to 1, and the equipment loading lists for the two working steps are generated as follows:

[0099] Step1:'1TTL3301PO','1TTL3201PO','1ETC301RD','1ETC201RD','1ETC101RD','1WCF002M O','1WCF001MO','1EMP312ZV','1EMP311ZV','1EMP310ZV','1EMP309ZV','1EMP308ZV','1 EMP307ZV','1WNC101AR','1WNC044VD','1HEN011AC','1HEN010AC','1HEN009AC','1HEN00 8AC','1HEN007AC','1HEN006AC','1HEN005AC','1HEN004AC','1HEN003AC','1HEN002AC';

[0100] Step2: '1WNC101CO'.

[0101] Since the loading weight of the reactor 1# chiller (compressor motor) in the 0s step '1WNC101CO' is 2, and the loading weight of the important plant water pump in the 5s step '1WES001PO' is 1, when the total capacity of the equipment is greater than the sum of the loading capacity of all steps of the diesel generator, the equipment with a larger loading weight is preferentially loaded to Step 2. The actual loading capacities of the above two steps are 863kW and 540kW respectively.

[0102] Assume that the emergency diesel generator contains three working steps, and the capacity of each working step is 550kW, 230kW, and 640kW respectively. The sum of the working step loading capacity of all working steps of the emergency diesel generator is 1420KW. After comparison, it is found that the total capacity of the equipment in this embodiment is greater than the sum of the working step loading capacity of all working steps of the diesel generator. At this time, the equipment should be loaded sequentially to the first to Nth working steps according to the loading weight, and the corresponding equipment loading list is generated as follows:

[0103] Step1:'1TTL3201PO','1ETC101RD','1WCF002MO','1WCF001MO','1EMP312ZV', '1EMP311ZV','1EMP310ZV','1EMP309ZV','1EMP308ZV','1EMP307ZV','1WNC101 AR','1WNC044VD','1HEN011AC','1HEN010AC','1HEN009AC','1HEN008AC','1HEN007AC','1HEN006AC','1HEN005AC','1HEN004AC','1HEN003AC','1HEN002AC';

[0104] Step2:'1ETC301RD','1ETC201RD';

[0105] Step3: '1TTL3301PO', '1WNC101CO'.

[0106] The actual loading capacities of each process step are 545kW, 228kW, and 630kW respectively.

[0107] In another specific embodiment of the present invention, assuming that some equipment is unavailable, the corresponding availability distribution matrix is ​​[1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0; 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1], and the equipment capacity matrix is ​​the same as that in the above embodiment. According to step S3013, the above two matrices are multiplied to determine that the total equipment capacity in this embodiment is the sum of the capacities of all equipment, that is, 941.1 kW.

[0108] Assume that the emergency diesel generator has two working steps, and the capacities of the two working steps are 1040kW and 640kW respectively. Since the total equipment capacity is less than the working step loading capacity of the first working step of the diesel generator, the equipment loading list of the first working step includes all equipment. The specific equipment loading list is as follows:

[0109] Step1:'1TTL3301PO','1ETC301RD','1ETC101RD','1WCF001MO','1EMP311ZV','1EMP309ZV','1 WES001PO','1WNC101AR','1HEN011AC','1HEN009AC','1HEN007AC','1HEN005AC','1HEN003AC';

[0110] Step 2: No loading.

[0111] The loading capacities of the above-mentioned process steps are 1015kW and 0kW respectively.

[0112] Assume that the emergency diesel generator contains three working steps, and the capacities of the three working steps are 550kW, 230kW, and 640kW respectively. If the total equipment capacity is greater than the working step loading capacity of the first working step of the diesel generator, and less than the sum of the working step loading capacities of all working steps of the diesel generator, then the loading weight of the equipment is determined. Based on the loading weight and equipment capacity matrix, the backpack algorithm is used to generate the equipment loading list from the first working step to the i-th working step in real time. The specific equipment loading list is as follows:

[0113] Step1:'1TTL3301PO','1ETC301RD','1ETC101RD','1WCF001MO','1EMP311ZV','1EMP309Z V','1WNC101AR','1HEN011AC','1HEN009AC','1HEN007AC','1HEN005AC','1HEN003AC'];

[0114] Step2: No loading;

[0115] Step3: '1EMP310ZV', '1EMP308ZV', '1EMP307ZV'.

[0116] The loading capacities of the above-mentioned process steps are: 455kW, 0kW, and 90kW respectively.

[0117] S4, using the equipment loading list, dynamically optimizes the nuclear power plant diesel generator loading program.

[0118] Furthermore, the startup sequence of the equipment can be limited by locking the startup time of the equipment in the logic. According to the equipment loading list of each step (i.e., optimized sequence), combined with the startup requirements of the diesel generator, the lock startup time of the equipment is updated and set in real time. The specific process can be seen in the attached Figure 2 .

[0119] The load of the diesel generator is loaded according to the obtained equipment loading list. After the equipment loading is updated, the data is re-iteratively updated and calculated until the diesel generator is out of operation. The method and device can be applied to newly built nuclear power units, as well as guiding the design and modification of the loading procedures of existing nuclear power units, and can further expand the equipment capacity that can be loaded by the diesel generator.

[0120] To achieve the same purpose as the above method, the present invention also proposes a dynamic optimization device for a nuclear power plant diesel generator loading program.

[0121] like Figure 3 2 shows a schematic diagram of a dynamic optimization device for a nuclear power plant diesel generator loading program of the present invention, the device comprises: an identification module 31, an acquisition module 32, a generation module 33 and an optimization module 34. The functions of each module will be introduced below.

[0122] The identification module 31 is used to identify the accident conditions of the nuclear power plant and determine the equipment under the accident conditions and the corresponding equipment capacity.

[0123] The acquisition module 32 is used to obtain the step loading capacity of each step of the diesel generator of the nuclear power plant and the availability distribution value of the equipment under different accident conditions.

[0124] The generation module 33 is used to generate in real time an equipment loading list for each working step of the diesel generator under an accident condition according to the equipment capacity, availability distribution value and working step loading capacity of the equipment.

[0125] Furthermore, the generating module 33 is used to:

[0126] Determine the total capacity of the equipment based on the equipment capacities and the corresponding availability distribution.

[0127] Compare the total equipment capacity to the process step loading capacity.

[0128] Based on the comparison results, an equipment loading list for each working step of the diesel generator under accident conditions is generated in real time.

[0129] Furthermore, the total capacity of the equipment is determined according to the equipment capacity and the corresponding availability distribution, including:

[0130] According to the equipment capacity and equipment loading priority, the equipment capacity matrix is ​​generated. The equipment capacity matrix is ​​expressed as:

[0131]

[0132] Among them, c ij represents the device capacity of the jth device in the i-th loading priority, n represents the maximum value of loading priority i, and m represents the maximum value of the device value.

[0133] According to the availability distribution value of the equipment under different accident conditions, the equipment availability distribution matrix is ​​generated. The equipment availability distribution matrix is ​​expressed as:

[0134]

[0135] Among them, a ij Represents the availability distribution value of the jth device in the i-th loading priority.

[0136] The total capacity of the equipment is determined by multiplying the equipment capacity matrix by the equipment availability distribution matrix.

[0137] Furthermore, based on the comparison results, a list of equipment loading for each working step of the diesel generator under the accident condition is generated in real time. The accident condition includes N working steps.

[0138] If the comparison result is that the total equipment capacity is less than the step loading capacity of the diesel generator in the first step, the equipment loading list of the first step includes all equipment.

[0139] If the comparison result is that the total equipment capacity is greater than the step loading capacity of the first step of the diesel generator, and less than the sum of the step loading capacities of all steps of the diesel generator, then the loading weight of the equipment is determined, and based on the loading weight and the equipment capacity matrix, the backpack algorithm is used to generate the equipment loading list from the first step to the i-th step in real time.

[0140] If the comparison result is that the total equipment capacity is greater than the sum of the step loading capacities of all steps of the diesel generator, the loading weight of the equipment is determined, and the equipment is loaded sequentially to the first to Nth steps according to the loading weight to generate a corresponding equipment loading list.

[0141] Furthermore, the loading weight of the equipment is determined, including:

[0142] According to the importance of each equipment to the mitigation of accident conditions, a corresponding loading weight is set for each equipment.

[0143] The optimization module 34 is used to dynamically optimize the nuclear power plant diesel generator loading program using the equipment loading list.

[0144] It should be understood that a dynamic optimization device for a nuclear power plant diesel generator loading program is consistent with the corresponding description of a dynamic optimization method for a nuclear power plant diesel generator loading program, so this embodiment will not be repeated.

[0145] In summary, it can be seen from the above description that the above embodiments of the present invention achieve the following technical effects:

[0146] 1. The present invention analyzes the specific accident conditions of the nuclear power plant and the loading requirements for equipment under the accident conditions in real time, combines the capacity of the diesel generator and the load characteristics requirements in the current working step, calculates the equipment capacity that can be loaded in the current working step in real time, and gives the optimal loading equipment list in real time to optimize the operation of the nuclear equipment in the power plant system. The method and device can reduce the starting pressure of the diesel generator, make full use of the maximum capacity of the diesel generator, reduce the capacity requirements for the diesel generator, and improve the economy of the equipment.

[0147] 2. The present invention introduces the availability distribution value of the equipment under different accident conditions and calculates the total capacity of the equipment currently to be loaded by the diesel generator in real time, so as to respond to the actual power demand more accurately. When a certain equipment is unavailable under the current accident condition, the load is dynamically adjusted according to the remaining capacity of the diesel generator, thereby ensuring the power supply of key equipment, reducing resource waste and improving the efficiency of the overall system.

[0148] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0149] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0150] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, which can be embodied in any computer-readable medium for use by an instruction execution system, apparatus or device (such as a computer-based system, a system including a processor or other system that can fetch instructions from an instruction execution system, apparatus or device and execute instructions), or used in combination with these instruction execution systems, apparatuses or devices.

[0151] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0152] It should be noted that, in the description of this specification, the description with 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 at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

Claims

1. A dynamic optimization method for a nuclear power plant diesel generator loading program, characterized in that: include: Identify the accident conditions of nuclear power plants and determine the equipment and corresponding equipment capacity under the accident conditions; Obtaining the step loading capacity of each step of the diesel generator of the nuclear power plant and the availability distribution value of the equipment under different accident conditions; Generating in real time an equipment loading list for each working step of the diesel generator under the accident working condition according to the equipment capacity, the availability distribution value and the working step loading capacity of the equipment; The equipment loading list is used to dynamically optimize the nuclear power plant diesel generator loading program.

2. The method according to claim 1, characterized in that According to the equipment capacity of the equipment, the availability distribution value and the work step loading capacity, an equipment loading list for each work step of the diesel generator under the accident condition is generated in real time, including: Determining a total capacity of a device according to the device capacity and the corresponding availability distribution; comparing the total capacity of the equipment with the loading capacity of the process step; Based on the comparison results, an equipment loading list for each working step of the diesel generator under the accident working condition is generated in real time.

3. The method according to claim 2, characterized in that Determining the total capacity of a device according to the device capacity and the corresponding availability distribution includes: According to the device capacity and the loading priority of the device, a device capacity matrix is ​​generated. The device capacity matrix is ​​expressed as: Among them, c ij represents the device capacity of the jth device in the i-th loading priority, n represents the maximum value of loading priority i, and m represents the maximum value of the device value; According to the availability distribution values ​​of the equipment under different accident conditions, an equipment availability distribution matrix is ​​generated. The equipment availability distribution matrix is ​​expressed as: Among them, a ij represents the availability distribution value of the jth device in the i-th loading priority; The device capacity matrix is ​​multiplied by the device availability distribution matrix to determine the total device capacity.

4. The method according to claim 3, characterized in that According to the comparison result, an equipment loading list of each working step of the diesel generator under the accident working condition is generated in real time, and the accident working condition includes N working steps. If the comparison result is that the total capacity of the equipment is less than the step loading capacity of the first step of the diesel generator, then the equipment loading list of the first step includes all equipment; If the comparison result is that the total capacity of the equipment is greater than the step loading capacity of the first step of the diesel generator and less than the sum of the step loading capacities of all steps of the diesel generator, then the loading weight of the equipment is determined, and based on the loading weight and the equipment capacity matrix, a knapsack algorithm is used to generate a real-time equipment loading list from the first step to the i-th step; If the comparison result is that the total capacity of the equipment is greater than the sum of the step loading capacities of all steps of the diesel generator, the loading weight of the equipment is determined, and the equipment is sequentially loaded to the first to Nth steps according to the loading weight to generate a corresponding equipment loading list.

5. The method according to claim 4, characterized in that Determining the loading weight of the device includes: According to the importance of each device to the mitigation of the accident condition, a corresponding loading weight is set for each device.

6. A dynamic optimization device for a nuclear power plant diesel generator loading program, characterized in that: include: An identification module, used to identify the accident conditions of the nuclear power plant and determine the equipment under the accident conditions and the corresponding equipment capacity; An acquisition module, used to acquire the step loading capacity of each step of the diesel generator of the nuclear power plant and the availability distribution value of the equipment under different accident conditions; A generating module, used for generating in real time an equipment loading list for each working step of the diesel generator under the accident working condition according to the equipment capacity of the equipment, the availability distribution value and the working step loading capacity; The optimization module is used to dynamically optimize the nuclear power plant diesel generator loading program by using the equipment loading list.

7. The device according to claim 6, characterized in that Generate modules for: Determining a total capacity of a device according to the device capacity and the corresponding availability distribution; comparing the total capacity of the equipment with the loading capacity of the process step; Based on the comparison results, an equipment loading list for each working step of the diesel generator under the accident working condition is generated in real time.

8. The device according to claim 7, characterized in that Determining the total capacity of a device according to the device capacity and the corresponding availability distribution includes: According to the device capacity and the loading priority of the device, a device capacity matrix is ​​generated. The device capacity matrix is ​​expressed as: Among them, c ij represents the device capacity of the jth device in the i-th loading priority, n represents the maximum value of loading priority i, and m represents the maximum value of the device value; According to the availability distribution values ​​of the equipment under different accident conditions, an equipment availability distribution matrix is ​​generated. The equipment availability distribution matrix is ​​expressed as: Among them, a ij represents the availability distribution value of the jth device in the i-th loading priority; The device capacity matrix is ​​multiplied by the device availability distribution matrix to determine the total device capacity.

9. The device according to claim 7, characterized in that According to the comparison result, an equipment loading list of each working step of the diesel generator under the accident working condition is generated in real time, and the accident working condition includes N working steps. If the comparison result is that the total capacity of the equipment is less than the step loading capacity of the first step of the diesel generator, then the equipment loading list of the first step includes all equipment; If the comparison result is that the total capacity of the equipment is greater than the step loading capacity of the first step of the diesel generator and less than the sum of the step loading capacities of all steps of the diesel generator, then the loading weight of the equipment is determined, and based on the loading weight and the equipment capacity matrix, a knapsack algorithm is used to generate a real-time equipment loading list from the first step to the i-th step; If the comparison result is that the total capacity of the equipment is greater than the sum of the step loading capacities of all steps of the diesel generator, the loading weight of the equipment is determined, and the equipment is sequentially loaded to the first to Nth steps according to the loading weight to generate a corresponding equipment loading list.

10. The device according to claim 9, characterized in that Determining the loading weight of the device includes: According to the importance of each device to the mitigation of the accident condition, a corresponding loading weight is set for each device.

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