Regional water network optimized water supply scheduling method based on failure hierarchy

Abstract

The invention relates to the technical field of water resource utilization, in particular to a regional water network optimized water supply scheduling method based on destruction hierarchy, which comprises the following steps: dividing and clustering water consumption units, and setting the water supply priority and the maximum allowable destruction depth of the water consumption units according to the importance degree; establishing and formulating a water supply damage hierarchy graph according to the water supply priorities of the water consumption units and the maximum allowable damage depth, and obtaining the water supply damage hierarchy of each water consumption unit from the water supply damage hierarchy graph; obtaining the water consumption of the water consumption unit in each time period in the scheduling period, and constructing an objective function based on the minimum water deficit of the damage level weight and the maximum accumulative reservoir available water supply amount; and according to the regional water resource configuration related constraints and the target function, establishing a regional water network optimization water supply scheduling model based on the destruction hierarchy. According to the method, the influence of the importance degree and the damage depth of the water consumption unit on regional water resource scheduling is considered, and scientific, reasonable and efficient technical support is provided for operation scheduling decision making of a regional water network.

Description

Technical Field

[0001] The present application relates to the technical field of water resource utilization, and in particular to a method for optimizing water supply scheduling of a regional water network based on damage levels. Background Art

[0002] With years of development, regional water networks, provincial water networks and national water networks have gradually taken shape. Regional water networks contain multiple water sources and multiple water users, among which water sources include various types of projects such as water storage projects, water diversion projects, and water lifting projects. Water users include various types of users such as domestic water, industrial water, and agricultural water. Water sources and water sources, and water sources and water users are connected through rivers and water transfer projects. The water volume transmission relationship of the regional water network is complex, and its water supply scheduling is a complex optimization problem with multiple objects and multiple objectives. How to use the formulation of a reasonable regional water network water supply scheduling plan, coordinate the water supply and water storage relationship of each water source, and the water use relationship of each water user unit, and realize the efficient operation of the water network project is a major key technology that needs to be solved urgently.

[0003] The existing regional water network water supply scheduling methods, such as the regional total water shortage minimum method, have the following shortcomings in actual use:

[0004] The method of minimizing the total regional water shortage does not consider the importance of different types of water use units (such as domestic water, industrial water, agricultural water, etc.) during the water scheduling process. It believes that the impact of water shortage on life, industry and agriculture is the same. Under the allocation criterion of minimum water shortage, it may result in water shortage for water use units with lower importance not yet, while water use units with higher importance are already short of water, which is inconsistent with the actual situation.

[0005] The minimum total water shortage method does not take into account the acceptability of different types of water use units to the damage depth during water scheduling. Under the allocation criterion of minimum water shortage, water shortage may be concentrated on one or a certain type of water use unit, causing the water shortage of some water use units to exceed the maximum allowable damage depth, while some water use units have not yet experienced water shortage, which is inconsistent with the actual situation.

[0006] The method of minimizing total water shortage only considers the water allocation method when the water inflow is low and there is water shortage, but does not consider the water allocation method when the water inflow is sufficient and there is no water shortage, that is, how each reservoir stores water. The use of this method has great limitations. Summary of the invention

[0007] To achieve the above objectives, this application provides the following technical solutions:

[0008] According to a first aspect of the present invention, the present invention claims a method for optimizing water supply scheduling of a regional water network based on damage levels, comprising:

[0009] Divide and cluster water use units, and set water supply priorities and maximum allowable damage depths of the water use units according to their importance;

[0010] Establishing a water supply damage level diagram according to the water supply priority and the maximum allowable damage depth of the water use unit, and obtaining the water supply damage level of each water use unit from the water supply damage level diagram;

[0011] Obtain the water consumption of the water-using unit in each period during the scheduling period, and construct an objective function based on the minimum water shortage and the maximum cumulative reservoir water supply based on the damage level weight;

[0012] According to the relevant constraints of regional water resources allocation and the objective function, a regional water network optimization water supply scheduling model based on damage level is established.

[0013] Furthermore, the method of dividing and clustering the water-using units and setting the water supply priority and the maximum allowable damage depth of the water-using units according to their importance also includes:

[0014] Setting the water shortage state of the water-using unit according to the maximum allowable damage depth;

[0015] The water shortage state includes: no damage state, slight damage state, maximum allowable damage state, severe damage state, and complete damage state;

[0016] After the water use units are divided and clustered, the water use units are divided into domestic water use units, industrial water use units, and agricultural water use units;

[0017] The water supply priority of the domestic water unit is higher than that of the industrial water unit;

[0018] The water supply priority of the industrial water use unit is higher than that of the agricultural water use unit.

[0019] Furthermore, the method of establishing a water supply damage level diagram according to the water supply priority and the maximum allowable damage depth of the water use unit, and obtaining the water supply damage level of each water use unit from the water supply damage level diagram, further includes:

[0020] The water supply disruption levels include eight levels in total;

[0021] Level 0: All water-using units are in an undamaged state;

[0022] Level 1: agricultural water use units are slightly damaged, and industrial and domestic water use units are not damaged;

[0023] Level 2: agricultural water use units are in the maximum allowable damage state, industrial water use units are in a slightly damaged state, and domestic water use units are in a non-damaged state;

[0024] Level 3: agricultural and industrial water use units are in the maximum allowable damage state, and domestic water use units are in a slightly damaged state;

[0025] Level 4: agricultural water use units are in a state of severe damage, and industrial and domestic water use units are in a state of maximum allowable damage;

[0026] Level 5: Agricultural water use units are in a state of complete destruction, industrial water use units are in a state of severe destruction, and domestic water use units are in a state of maximum allowable destruction;

[0027] Level 6: Agricultural and industrial water use units are in a state of complete destruction, and domestic water use units are in a state of maximum allowable destruction;

[0028] Level 7: All water-using units are in a state of complete destruction.

[0029] Furthermore, the method of obtaining the water consumption of the water-using unit in each period during the scheduling period and constructing an objective function based on minimizing the water shortage of the damage level weight and maximizing the cumulative reservoir water supply also includes:

[0030] Obtain the water consumption of the water-using unit in each period during the scheduling period, and calculate the water shortage of a single water-using unit in a single period;

[0031] According to the water shortage of the water-using unit in each period during the scheduling period, a weighted water shortage based on the damage level is constructed;

[0032] According to the weighted water shortage of a single water-using unit in a single period, the target value of the cumulative weighted water shortage is obtained;

[0033] Obtain the water supply of a single reservoir in a single period of time and calculate the cumulative water supply of the reservoir.

[0034] Furthermore, the establishment of a regional water network optimization water supply scheduling model based on the damage level according to the constraints related to regional water resources allocation and the objective function also includes:

[0035] Weights are assigned to the target values ​​of the cumulative reservoir water supply and the cumulative weighted water shortage, and a regional water network optimization water supply scheduling model based on the damage level is established.

[0036] Furthermore, the method of obtaining the water consumption of the water-using unit in each time period during the scheduling period and calculating the water shortage of a single water-using unit in a single time period also includes:

[0037] The water shortage of a single water-using unit in a single period is described by formula (1):

[0038] WD i,t =WN i,t -WU i,t (1)

[0039] Where WU i,t is the water consumption of the ith water-using unit in the tth period; WN i,t is the water demand of the i-th water use unit in the t-th period; WD i,t is the water shortage of the i-th water-using unit in the t-th period.

[0040] Furthermore, the weighted water shortage based on the damage level is constructed according to the water shortage of the water-using unit in each period during the scheduling period, and further includes:

[0041] The weighted water shortage of a single water use unit in a single period of time coupled with the importance and damage depth is described as formula (2):

[0042]

[0043] Where WD' i,t is the weighted water shortage of the ith water-using unit in the tth period; α i is the importance coefficient of the i-th water-using unit, α i The value is an integer greater than or equal to 1. The more important the water-using unit is, the more important α is. i The larger the value of .

[0044] Furthermore, according to the weighted water shortage of a single water-using unit in a single period, a target value of the accumulated weighted water shortage is obtained, which also includes:

[0045] The target value of the system's cumulative weighted water shortage is described as formula (3):

[0046]

[0047] Where FWD is the target value of the system's cumulative weighted water shortage; M is the number of water-using units in the system; and T is the number of scheduling periods.

[0048] Furthermore, the method of obtaining the water supply of a single reservoir in a single period and calculating the cumulative water supply of the reservoir may further include:

[0049] The water supply of a single reservoir in a single period is described by formula (4):

[0050]

[0051] Where W j,t V is the water supply of the jth reservoir in the tth period; j,t V is the storage capacity corresponding to the water level of the jth reservoir in the tth period; low j,t is the storage capacity corresponding to the minimum restricted water level of the j-th reservoir in the t-th period;

[0052] The system's cumulative reservoir water supply is described as formula (5):

[0053]

[0054] Where FW is the total water supply of the system reservoirs; N is the number of system reservoirs.

[0055] The present application relates to the technical field of water resource utilization, and in particular to a method for optimizing water supply scheduling of a regional water network based on damage levels, which divides and clusters water use units, sets the water supply priority and maximum allowable damage depth of water use units according to their importance; establishes a water supply damage hierarchy diagram based on the water supply priority and maximum allowable damage depth of water use units, and obtains the water supply damage hierarchy diagram of each water use unit; obtains the water consumption of water use units in each period during the scheduling period, and constructs an objective function based on the minimum water shortage and the maximum cumulative reservoir water supply based on the weight of the damage level; and establishes a regional water network optimization water supply scheduling model based on the damage level according to the relevant constraints and objective functions of regional water resource configuration. The present invention takes into account the impact of the importance of water use units and the depth of damage on regional water resource scheduling, and provides scientific, reasonable and efficient technical support for the operation and scheduling decision-making of regional water networks. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 A work flow chart of a method for optimizing water supply scheduling of a regional water network based on damage levels as claimed in an embodiment of the present invention;

[0057] Figure 2 A schematic diagram of a weighted water shortage function of a method for optimizing water supply scheduling of a regional water network based on damage levels as claimed in an embodiment of the present invention;

[0058] Figure 3 A water supply damage depth map of a method for optimizing water supply scheduling of a regional water network based on damage levels as claimed in an embodiment of the present invention; DETAILED DESCRIPTION

[0059] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0060] The terms "first", "second" and "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second" and "third" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. All directional indications in the embodiments of the present application (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0061] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0062] According to the first embodiment of the present invention, the present invention claims a method for optimizing water supply scheduling of a regional water network based on damage levels, referring to Figure 1 ,include;

[0063] Divide and cluster water use units, and set water supply priorities and maximum allowable damage depths of the water use units according to their importance;

[0064] Establishing a water supply damage level diagram according to the water supply priority and the maximum allowable damage depth of the water use unit, and obtaining the water supply damage level of each water use unit from the water supply damage level diagram;

[0065] Obtain the water consumption of the water-using unit in each period during the scheduling period, and construct an objective function based on the minimum water shortage and the maximum cumulative reservoir water supply based on the damage level weight;

[0066] According to the relevant constraints of regional water resources allocation and the objective function, a regional water network optimization water supply scheduling model based on damage level is established.

[0067] Furthermore, the method of dividing and clustering the water-using units and setting the water supply priority and the maximum allowable damage depth of the water-using units according to their importance also includes:

[0068] Setting the water shortage state of the water-using unit according to the maximum allowable damage depth;

[0069] The water shortage state includes: no damage state, slight damage state, maximum allowable damage state, severe damage state, and complete damage state;

[0070] After the water use units are divided and clustered, the water use units are divided into domestic water use units, industrial water use units, and agricultural water use units;

[0071] The water supply priority of the domestic water unit is higher than that of the industrial water unit;

[0072] The water supply priority of the industrial water use unit is higher than that of the agricultural water use unit.

[0073] Among them, in this embodiment, the importance of the water use unit, that is, the water supply priority α (α is an integer greater than or equal to 1, the more important the water use unit, the larger the value of α), is set, and the maximum allowable damage depth β of the water use unit is set. For a certain water use unit, its water shortage status is divided into 5 types. The first is a non-damage state, in which the water use unit supplies water on demand and the water shortage is 0; the second is a mild damage state, in which the water use unit is short of water, but the water shortage ratio does not exceed the maximum allowable damage depth; the third is the maximum allowable damage state, in which the water use unit is short of water, and the water shortage ratio is equal to the maximum allowable damage depth; the fourth is a severe damage state, in which the water use unit is short of water, and the water shortage ratio exceeds the maximum allowable damage depth; the fifth is a complete damage state, in which the water use unit is completely short of water and the water supply is 0.

[0074] Furthermore, the method of establishing a water supply damage level diagram according to the water supply priority and the maximum allowable damage depth of the water use unit, and obtaining the water supply damage level of each water use unit from the water supply damage level diagram, further includes:

[0075] The water supply disruption levels include eight levels in total;

[0076] Level 0: All water-using units are in an undamaged state;

[0077] Level 1: agricultural water use units are slightly damaged, and industrial and domestic water use units are not damaged;

[0078] Level 2: agricultural water use units are in the maximum allowable damage state, industrial water use units are in a slightly damaged state, and domestic water use units are in a non-damaged state;

[0079] Level 3: agricultural and industrial water use units are in the maximum allowable damage state, and domestic water use units are in a slightly damaged state;

[0080] Level 4: agricultural water use units are in a state of severe damage, and industrial and domestic water use units are in a state of maximum allowable damage;

[0081] Level 5: Agricultural water use units are in a state of complete destruction, industrial water use units are in a state of severe destruction, and domestic water use units are in a state of maximum allowable destruction;

[0082] Level 6: Agricultural and industrial water use units are in a state of complete destruction, and domestic water use units are in a state of maximum allowable destruction;

[0083] Level 7: All water-using units are in a state of complete destruction.

[0084] Furthermore, the method of obtaining the water consumption of the water-using unit in each period during the scheduling period and constructing an objective function based on minimizing the water shortage of the damage level weight and maximizing the cumulative reservoir water supply also includes:

[0085] Obtain the water consumption of the water-using unit in each period during the scheduling period, and calculate the water shortage of a single water-using unit in a single period;

[0086] According to the water shortage of the water-using unit in each period during the scheduling period, a weighted water shortage based on the damage level is constructed;

[0087] According to the weighted water shortage of a single water-using unit in a single period, the target value of the cumulative weighted water shortage is obtained;

[0088] Obtain the water supply of a single reservoir in a single period of time and calculate the cumulative water supply of the reservoir.

[0089] Furthermore, the establishment of a regional water network optimization water supply scheduling model based on the damage level according to the constraints related to regional water resources allocation and the objective function also includes:

[0090] Weights are assigned to the target values ​​of the cumulative reservoir water supply and the cumulative weighted water shortage, and a regional water network optimization water supply scheduling model based on the damage level is established.

[0091] Furthermore, the method of obtaining the water consumption of the water-using unit in each time period during the scheduling period and calculating the water shortage of a single water-using unit in a single time period also includes:

[0092] The water shortage of a single water-using unit in a single period is described by formula (1):

[0093] WD i,t =WN i,t -WU i,t (1)

[0094] Where WU i,t is the water consumption of the ith water-using unit in the tth period; WN i,t is the water demand of the i-th water use unit in the t-th period; WD i,t is the water shortage of the i-th water-using unit in the t-th period.

[0095] Furthermore, the weighted water shortage based on the damage level is constructed according to the water shortage of the water-using unit in each period during the scheduling period, and further includes:

[0096] The weighted water shortage of a single water use unit in a single period of time coupled with the importance and damage depth is described as formula (2):

[0097]

[0098] Where WD' i,t is the weighted water shortage of the ith water-using unit in the tth period; α i is the importance coefficient of the i-th water-using unit, α i The value is an integer greater than or equal to 1. The more important the water-using unit is, the more important α is. i The larger the value of .

[0099] In this embodiment, if there are three water use units with different importance, namely, domestic water, industrial water, and agricultural water, and the importance is ranked from high to low as domestic water, industrial water, and agricultural water, then α i The values ​​of can be 3, 2, and 1 respectively; i is the maximum allowable damage depth of the i-th water use unit; λ is the water supply damage level conversion coefficient.

[0100] Taking domestic water, industrial water, and agricultural water as examples, the importance of three water units with different degrees of importance are ranked from high to low as domestic water, industrial water, and agricultural water. i The values ​​are set to 3, 2, and 1, assuming that the water demand of the three water-using units is 1 million m 3 , then the weighted water shortage function diagram of the three water-using units is shown in the attached figure. Figure 2 shown.

[0101] Furthermore, according to the weighted water shortage of a single water-using unit in a single period, a target value of the accumulated weighted water shortage is obtained, which also includes:

[0102] The target value of the system's cumulative weighted water shortage is described as formula (3):

[0103]

[0104] Where FWD is the target value of the system's cumulative weighted water shortage; M is the number of water-using units in the system; and T is the number of scheduling periods.

[0105] Furthermore, the method of obtaining the water supply of a single reservoir in a single period and calculating the cumulative water supply of the reservoir may further include:

[0106] The water supply of a single reservoir in a single period is described by formula (4):

[0107]

[0108] Where W j,t V is the water supply of the jth reservoir in the tth period; j,t V is the storage capacity corresponding to the water level of the jth reservoir in the tth period; low j,t is the storage capacity corresponding to the minimum restricted water level of the j-th reservoir in the t-th period;

[0109] The system's cumulative reservoir water supply is described as formula (5):

[0110]

[0111] Where FW is the total water supply of the system reservoirs; N is the number of system reservoirs.

[0112] In this embodiment, the model objective function is described as formula (6):

[0113] minF=w1·FWD-w2·FW (6)

[0114] In the formula, F is the total objective function; w1 is the weight coefficient of the cumulative weighted water shortage; FWD is the cumulative weighted water shortage; w2 is the weight coefficient of the cumulative reservoir water supply, w1>>w2.

[0115] The constraints of the regional water network optimal water supply scheduling model based on the damage level can be divided into two categories: the first category is the upper and lower boundary constraints of variables, and the second category is the water balance constraints.

[0116] 1) Upper and lower limits of reservoir capacity:

[0117]

[0118] Where V j,t is the storage capacity corresponding to the water level of the jth reservoir in the tth period; is the storage capacity corresponding to the minimum restricted water level of the jth reservoir in the tth period; is the storage capacity corresponding to the maximum limit water level of the jth reservoir in the tth period.

[0119] 2) Reservoir outflow / sluice upper and lower limit flow constraints:

[0120]

[0121] In the formula, R j,t is the outflow / water volume passing through the sluice gate of the jth reservoir / sluice gate in the tth period; is the maximum allowable outflow / water volume passing through the sluice gate at the jth reservoir / sluice gate in the tth period; It is the minimum allowable outflow / water volume passing through the jth reservoir / sluice in the tth period.

[0122] 3) Constraints on the upper limit of water consumption of water-using units:

[0123] 0≤WU i,t ≤WN i,t (9)

[0124] Where WU i,t is the water consumption of the ith water-using unit in the tth period; WN i,t is the water demand of the i-th water user unit in the t-th period.

[0125] 4) Pipeline water supply constraints:

[0126]

[0127] Where, WP k,t is the water supply of the kth pipeline in the tth period; is the maximum allowable water supply of the kth pipeline in the tth period.

[0128] 5) Water balance of water use unit:

[0129]

[0130] WD i,t +WU i,t =WN i,t (12)

[0131] In the formula, Β i is the set of water supply pipes connected to the i-th water user unit.

[0132] 6) Reservoir inflow / sluice inflow balance:

[0133]

[0134] In the formula, Q' j,t is the interval inflow / inflow volume of the jth reservoir / sluice at the tth period; Φ j is the set of reservoirs and sluices connected upstream of the jth reservoir / sluice; Ω j b is the set of agricultural drainage units connected to the jth reservoir / sluice gate; i,j a is the water withdrawal allocation coefficient of the i-th water use unit (agricultural water withdrawal unit) to the j-th reservoir / sluice gate;i,1 、a i,2 are the water withdrawal ratios of the i-th water use unit (agricultural water withdrawal unit) in periods t-1 and t-2 respectively.

[0135] 7) Reservoir water balance:

[0136]

[0137] In the formula, Α j is the set of water supply pipes connected to the jth reservoir.

[0138] 8) Sluice water balance:

[0139]

[0140] In the formula, Α j is the set of water supply pipes connected to the j-th sluice.

[0141] The linear programming method is used to solve the regional water network optimization water supply scheduling model based on the damage level. According to the solution results, the operation scheduling plan of each water source in each scheduling period and the water use plan of each water use unit are obtained.

[0142] The following is an implementation example of the water resource allocation of a regional water network under the condition of 95% frequency of water inflow, and specifically describes the regional water resource optimization scheduling method based on the water supply damage level provided by the present invention, and calculates the scheduling operation process of each reservoir and the water supply process of each water-using unit. The implementation steps of the present invention are as follows:

[0143] Step 1: Collect and organize relevant data on water sources, water use units, water supply networks, etc. related to the water supply scheduling of the regional water network;

[0144] Step 2: Divide the water use units into three types: domestic, industrial and agricultural. The importance of the three types of water use units is as follows: domestic water use unit > industrial water use unit > agricultural water use unit. The importance of water use units of the same type is the same. The maximum allowable damage depths of domestic water use units, industrial water use units and agricultural water use units are set to 0.3, 0.4 and 0.5 respectively.

[0145] Step 3: Develop a water supply disruption hierarchy map for the area;

[0146] Step 4: Construct the water supply topology of the region, including the upstream and downstream connection relationship between water sources, the connection relationship between water sources and water supply pipelines, the drainage connection relationship between water sources and agricultural water use units, and the connection relationship between water use units and water supply pipelines.

[0147] Step 5: Calculate the water shortage WD of the water-using unit i,t and its corresponding weighted water deficit WD'i,t ,in:

[0148] WD i,t =WN i,t -WU i,t (1)

[0149]

[0150] Where WU i,t is the water consumption of the ith water-using unit in the tth period; WN i,t is the water demand of the i-th water use unit in the t-th period; WD i,t is the water shortage of the i-th water-using unit in the t-th period; WD' i,t is the weighted water shortage value of the tth period of the i-th water use unit; α i is the importance coefficient of the i-th water use unit, the agricultural water use unit is set to 1, the industrial water use unit is set to 2, and the domestic water use unit is set to 3; β i is the maximum allowable damage depth of the ith water use unit, the maximum allowable damage depth of the agricultural water use unit is set to 0.5, the maximum allowable damage depth of the industrial water use unit is set to 0.4, and the maximum allowable damage depth of the domestic water use unit is set to 0.3; λ is the water supply damage level conversion coefficient, and its value is equal to 10.

[0151] Step 6: Calculate the cumulative weighted water shortage target value FWD for the region, where:

[0152]

[0153] Where FWD is the target value of the system's cumulative weighted water shortage; M is the number of water-using units in the system; and T is the number of scheduling periods.

[0154] Step 7: Calculate the available water volume W of the reservoir j,t , and the maximum target of cumulative water supply FW, where:

[0155]

[0156] Step 8: With the goal of minimizing the cumulative weighted water shortage and maximizing the cumulative water supply, considering the corresponding constraints, establish a water resources optimization allocation model for the region based on the weighted water shortage value coupled with the importance and damage depth.

[0157] The model objective function is as follows:

[0158] minF=w1·FWD-w2·FW (6)

[0159] Where F is the total objective function; w1 is the weight coefficient of the cumulative weighted water shortage, which is set to 10000.0; FWD is the cumulative weighted water shortage; w2 is the weight coefficient of the cumulative reservoir water supply, which is set to 1.0; FW is the cumulative reservoir water supply.

[0160] The model constraints include the following:

[0161] 1) Upper and lower limit constraints of reservoir capacity: The lower limit of reservoir capacity is set to the capacity corresponding to the dead water level, the upper limit of reservoir capacity is set to the capacity corresponding to the flood limit water level during the flood season, and the capacity corresponding to the normal water storage level during other periods.

[0162] 2) Constraints on the outflow of reservoirs / sluice gates: The minimum outflow of reservoirs / sluice gates is set to the ecological water volume, and the maximum is set to the safe water volume considering the downstream flood control safety;

[0163] 3) Constraints on water consumption of water-using units: The lower limit of water consumption of water-using units is set to 0, and the upper limit is set to the water demand of water-using units;

[0164] 4) Pipeline water supply constraint: The lower limit of pipeline water supply is set to 0, and the upper limit is set to the pipeline water supply capacity;

[0165] 5) Water balance of water-using units;

[0166] 6) Reservoir inflow / sluice inflow balance;

[0167] 7) Reservoir water balance;

[0168] 8) Water balance in sluice gates.

[0169] Step 7: Use the linear programming method to solve the established regional water network optimization water supply scheduling model based on the damage level, and obtain the water supply plan of each water source in each scheduling period and the water use plan of each water use unit according to the solution results.

[0170] The damage depth of water use units after the implementation of the technical solution is shown in Table 1, and the monthly damage depth of different types of water use units is shown in Appendix Figure 3 It can be seen that when the water frequency reaches 95%, the total water shortage in the area is 99.65 million m 3 , the overall water shortage ratio is 53%. The total water shortage ratio of domestic water units is 30%, and the damage depth in each month is the maximum allowable damage depth of 0.3; the total water shortage ratio of industrial water units is 71%. From June to October, the industrial damage depth is the maximum allowable damage depth of 0.4, and the damage depth from November to May of the following year exceeds the maximum allowable damage depth, with an average of 0.88; the total water shortage ratio of agricultural water units is 0.44%. Huashan irrigation area, Bailang irrigation area, Jiulong irrigation area and Dongfeng irrigation area with large water demand have independent water sources, and the water shortage is smaller than that of other agricultural water units.

[0171] Table 1 Destruction depth of each water-using unit in each month

[0172]

[0173]

[0174] In addition, each functional unit in the embodiment of the present application can be integrated into a processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of software functional units. The above is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the content of the specification and drawings of this application, or directly or indirectly used in other related technical fields, is also included in the patent protection scope of the present application.

[0175] The specific implementation methods of the invention are described in detail above, but they are only examples, and the present application is not limited to the specific implementation methods described above. For those skilled in the art, any equivalent modification or substitution of the invention is also within the scope of the present application, and therefore, the equalization, modification, and improvement made without departing from the spirit and principle of the present application should be included in the scope of the present application.

Claims

1. A method for optimizing water supply scheduling of a regional water network based on damage levels, characterized in that: include; Divide and cluster water use units, and set water supply priorities and maximum allowable damage depths of the water use units according to their importance; Establishing a water supply damage level diagram according to the water supply priority and the maximum allowable damage depth of the water use unit, and obtaining the water supply damage level of each water use unit from the water supply damage level diagram; Obtain the water consumption of the water-using unit in each period during the scheduling period, and construct an objective function based on the minimum water shortage and the maximum cumulative reservoir water supply based on the damage level weight; According to the relevant constraints of regional water resources allocation and the objective function, a regional water network optimization water supply scheduling model based on damage level is established.

2. According to the method of optimizing water supply scheduling of regional water network based on damage level in claim 1, it is characterized in that: The method of dividing and clustering the water use units and setting the water supply priority and the maximum allowable damage depth of the water use units according to their importance also includes: Setting the water shortage state of the water-using unit according to the maximum allowable damage depth; The water shortage state includes: no damage state, slight damage state, maximum allowable damage state, severe damage state, and complete damage state; After the water use units are divided and clustered, the water use units are divided into domestic water use units, industrial water use units, and agricultural water use units; The water supply priority of the domestic water unit is higher than that of the industrial water unit; The water supply priority of the industrial water use unit is higher than that of the agricultural water use unit.

3. The method for optimizing water supply scheduling of a regional water network based on damage levels according to claim 1 is characterized in that: The method of establishing a water supply damage level diagram according to the water supply priority and the maximum allowable damage depth of the water use unit, and obtaining the water supply damage level of each water use unit from the water supply damage level diagram, further includes: The water supply disruption levels include eight levels in total; Level 0: All water-using units are in an undamaged state; Level 1: agricultural water use units are slightly damaged, and industrial and domestic water use units are not damaged; Level 2: agricultural water use units are in the maximum allowable damage state, industrial water use units are in a slightly damaged state, and domestic water use units are in a non-damaged state; Level 3: agricultural and industrial water use units are in the maximum allowable damage state, and domestic water use units are in a slightly damaged state; Level 4: agricultural water use units are in a state of severe damage, and industrial and domestic water use units are in a state of maximum allowable damage; Level 5: Agricultural water use units are in a state of complete destruction, industrial water use units are in a state of severe destruction, and domestic water use units are in a state of maximum allowable destruction; Level 6: Agricultural and industrial water use units are in a state of complete destruction, and domestic water use units are in a state of maximum allowable destruction; Level 7: All water-using units are in a state of complete destruction.

4. The method for optimizing water supply scheduling of a regional water network based on damage levels according to claim 1 is characterized in that: The method of obtaining the water consumption of the water-using unit in each period during the scheduling period and constructing an objective function based on minimizing the water shortage of the damage level weight and maximizing the cumulative reservoir water supply also includes: Obtain the water consumption of the water-using unit in each period during the scheduling period, and calculate the water shortage of a single water-using unit in a single period; According to the water shortage of the water-using unit in each period during the scheduling period, a weighted water shortage based on the damage level is constructed; According to the weighted water shortage of a single water-using unit in a single period, the target value of the cumulative weighted water shortage is obtained; Obtain the water supply of a single reservoir in a single period of time and calculate the cumulative water supply of the reservoir.

5. A method for optimizing water supply scheduling of a regional water network based on damage levels according to claim 4, characterized in that: The method of establishing a regional water network optimization water supply scheduling model based on the damage level according to the regional water resources allocation related constraints and the objective function also includes: Weights are assigned to the target values ​​of the cumulative reservoir water supply and the cumulative weighted water shortage, and a regional water network optimization water supply scheduling model based on the damage level is established.

6. A method for optimizing water supply scheduling of a regional water network based on damage levels according to claim 4, characterized in that: The method of obtaining the water consumption of the water-using unit in each time period during the scheduling period and calculating the water shortage of a single water-using unit in a single time period also includes: The water shortage of a single water-using unit in a single period is described by formula (1): WD i,t =WN i,t -WU i,t (1) Where WU i,t is the water consumption of the ith water-using unit in the tth period; WN i,t is the water demand of the i-th water use unit in the t-th period; WD i,t is the water shortage of the i-th water-using unit in the t-th period.

7. A method for optimizing water supply scheduling of a regional water network based on damage levels according to claim 4, characterized in that: The weighted water shortage based on the damage level is constructed according to the water shortage of the water use unit in each period during the scheduling period, and further includes: The weighted water shortage of a single water use unit in a single period of time coupled with the importance and damage depth is described as formula (2): Where WD' i,t is the weighted water shortage of the ith water-using unit in the tth period; α i is the importance coefficient of the i-th water-using unit, α i The value is an integer greater than or equal to 1. The more important the water-using unit is, the more important α is. i The larger the value of .

8. The method for optimizing water supply scheduling of a regional water network based on damage levels according to claim 4 is characterized in that: According to the weighted water shortage of a single water-using unit in a single period, the target value of the accumulated weighted water shortage is obtained, which also includes: The target value of the system's cumulative weighted water shortage is described as formula (3): Where FWD is the target value of the system's cumulative weighted water shortage; M is the number of water-using units in the system; and T is the number of scheduling periods.

9. The method for optimizing water supply scheduling of a regional water network based on damage levels according to claim 4 is characterized in that: The method of obtaining the water supply of a single reservoir in a single period and calculating the cumulative water supply of the reservoir also includes: The water supply of a single reservoir in a single period is described by formula (4): Where W j,t V is the water supply of the jth reservoir in the tth period; j,t V is the storage capacity corresponding to the water level of the jth reservoir in the tth period; low j,t is the storage capacity corresponding to the minimum restricted water level of the jth reservoir in the tth period; The system's cumulative reservoir water supply is described as formula (5): Where FW is the total water supply of the system reservoirs; N is the number of system reservoirs.

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