Load phase sequence adjusting method and system considering position information
By obtaining the position and phase sequence data of single-phase tables, dividing adjustable phase single-phase tables and building a load phase sequence adjustment model, the problem of three-phase imbalance in the low-voltage distribution station area is solved, and a feasible load phase sequence adjustment solution is generated to improve the The power grid operation efficiency and power quality.
Patent Information
- Application Number
- CN202411477997.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2024-12-27
AI Technical Summary
The three-phase imbalance problem caused by insufficient planning and construction, lack of orderly load development and insufficient management in the low-voltage distribution station area is difficult to effectively solve, especially in rural station areas, which has led to the fact that the existing technology is difficult to solve. It is difficult to adjust the load phase sequence.
By obtaining the position and phase sequence data of the single-phase table, dividing the adjustable phase single-phase table, building a load phase sequence adjustment model, solving it with the goal of minimizing the complexity of interphase load adjustment, and generating a feasible load phase sequence adjustment scheme, considering Whether the meter can be adjusted and the phase adjustment effect ensures the practical feasibility of the plan and engineering operability.
On the basis of ensuring the operating efficiency and power quality of the power grid, it reduces the losses and problems caused by three-phase imbalance, and improves the operating efficiency of the power grid and the overall efficiency of the power system.
Smart Images
Figure CN119209630A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of power distribution, and in particular relates to a load phase sequence adjustment method and system taking into account position information. Background Art
[0002] The three-phase imbalance problem is more prominent in low-voltage distribution substations due to insufficient planning and construction, lack of order in load development, and inadequate management. This imbalance not only directly affects the stability of the voltage, but also increases the energy consumption of the power grid, thereby reducing the efficiency of the power system. Therefore, the substation operation and maintenance personnel are in urgent need of an effective method to improve the three-phase imbalance in the substation.
[0003] At present, the commonly used method in engineering is that the operation and maintenance personnel select an appropriate number of meters in the heavy-load phase sequence and transfer them to the light-load phase sequence. This method relies on the experience of the personnel, lacks reasonable argumentation, and may not be effective. Another method is to optimize the combination of single-phase meters to obtain the load phase sequence adjustment plan. This method can improve the adjustment effect, but it does not take into account the feasibility of the actual project and is often difficult to implement, especially in rural areas, where there are a large number of branch conductors laid in single phase, and many meters do not have the conditions for adjustment to other phase sequences; even if they all have the adjustment conditions, they are likely to be scattered in multiple locations far apart, making the transformation more difficult. Summary of the invention
[0004] In order to overcome the defect of the prior art that the load phase sequence adjustment scheme is difficult to implement due to failure to consider the position information of the electric meter, the present invention provides a load phase sequence adjustment method taking the position information into consideration.
[0005] In order to achieve the above technical effects, the technical solution of the present invention is as follows:
[0006] A method for adjusting load phase sequence taking into account position information comprises the following steps:
[0007] Obtain the location, phase sequence and power data per unit time of the single-phase meter in the substation area;
[0008] dividing the adjustable phase single-phase table from the one-way table based on the phase sequence and position of the single-phase table;
[0009] A load phase sequence adjustment model is constructed to evaluate the complexity of inter-phase load adjustment according to the phase adjustment status of the adjustable phase single-phase meter and the power of all single-phase meters per unit time;
[0010] The load phase sequence adjustment model is solved with the goal of minimizing the complexity of inter-phase load adjustment, and the single-phase meter and its phase adjustment state that undergo phase adjustment in the model under the optimal inter-phase load adjustment complexity are recorded to obtain a load phase sequence adjustment plan. Based on the load phase sequence adjustment plan, the load phase sequence is adjusted in the substation.
[0011] The present invention further proposes a load phase sequence adjustment system taking into account position information, the system comprising:
[0012] Data acquisition module: used to obtain the location, phase sequence and power data per unit time of the single-phase meter in the substation area;
[0013] The adjustable-phase single-phase table division module is used to divide the adjustable-phase single-phase table from the one-way table based on the phase sequence and position of the single-phase table;
[0014] Load phase sequence adjustment solution solution module: used to construct a load phase sequence adjustment model, solve the load phase sequence adjustment model with the goal of minimizing the complexity of phase-to-phase load adjustment, record the single-phase meter and its phase adjustment status that undergo phase adjustment in the model under the optimal phase-to-phase load adjustment complexity, and obtain the load phase sequence adjustment solution.
[0015] The present invention also proposes an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the load phase sequence adjustment method taking into account position information as described in the present invention when executing the computer program.
[0016] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:
[0017] The present invention proposes a load phase sequence adjustment method taking into account position information. First, single-phase meters with adjustment conditions are screened in advance according to the position information of the electric meter to ensure that the obtained adjustment plan has the feasibility of actual engineering. Secondly, a load phase sequence adjustment model is constructed, and the phase sequence adjustment plan is obtained by solving the model. The model takes into account whether the electric meter can be phase-adjusted and the effect and operation burden of the phase adjustment of the electric meter. The optimal adjustment plan is obtained by solving the model, and the electric meter in the substation can be phase-adjusted according to the optimal adjustment plan. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a flow chart of the load phase sequence adjustment method taking position information into account according to Embodiment 1.
[0019] Figure 2 This is an architectural diagram of a load phase sequence adjustment system taking position information into account according to Example 2.
[0020] Figure 3 This is a geographical location distribution map of single-phase meters in a certain area of Example 3. DETAILED DESCRIPTION
[0021] The accompanying drawings are only used for illustrative purposes and are not to be construed as limiting the present invention;
[0022] It is understandable to those skilled in the art that some well-known descriptions may be omitted in the drawings.
[0023] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.
[0024] Example 1
[0025] This embodiment proposes a load phase sequence adjustment method taking into account position information, such as Figure 1 FIG. 1 is a flow chart of the load phase sequence adjustment method taking position information into consideration according to the present embodiment.
[0026] The load phase sequence adjustment method taking into account position information proposed in this embodiment includes the following steps:
[0027] Obtain the location, phase sequence and power data per unit time of the single-phase meter in the substation area;
[0028] dividing the adjustable phase single-phase table from the one-way table based on the phase sequence and position of the single-phase table;
[0029] A load phase sequence adjustment model is constructed to evaluate the complexity of inter-phase load adjustment according to the phase adjustment status of the adjustable phase single-phase meter and the power of all single-phase meters per unit time;
[0030] The load phase sequence adjustment model is solved with the goal of minimizing the complexity of inter-phase load adjustment, and the single-phase meter and its phase adjustment state that undergo phase adjustment in the model under the optimal inter-phase load adjustment complexity are recorded to obtain a load phase sequence adjustment plan. Based on the load phase sequence adjustment plan, the load phase sequence is adjusted in the substation.
[0031] In this embodiment, single-phase meters that meet the adjustment conditions are screened in advance through the location information of the electricity meter, ensuring the practical operability and engineering feasibility of the scheme; by constructing a load phase sequence adjustment model, and solving it with the optimal phase-to-phase load adjustment complexity as the goal; the model not only considers whether the electricity meter is convenient for phase adjustment in terms of location, but also integrates the effect of the phase adjustment of the electricity meter and the operational burden, so that the model can more comprehensively reflect the actual situation; the single-phase meters that undergo phase adjustment under the optimal complexity are recorded, and the load phase sequence adjustment plan is generated and implemented in the substation, so as to improve the operating efficiency and power quality of the power grid and reduce the losses and problems caused by three-phase imbalance.
[0032] In an optional embodiment, the step of dividing the adjustable-phase single-phase table from the one-way table based on the phase sequence and position of the single-phase table includes:
[0033] Preset grouping distance and adjustable phase distance;
[0034] The single-phase meters are grouped based on their phase sequences and the grouping distances to obtain a plurality of same-phase adjacent groups; wherein the single-phase meters with the same phase sequence and a distance less than the grouping distance are grouped into the same same-phase adjacent group;
[0035] For the same-phase adjacent group, determine whether there are single-phase meters of other phases that are separated from any single-phase meter in the same-phase adjacent group by a distance less than the adjustable phase distance. If so, all single-phase meters in the same-phase adjacent group are classified as adjustable-phase single-phase meters. Otherwise, determine the next same-phase adjacent group.
[0036] Specifically, the single-phase meters are grouped based on their phase sequence and the grouping distance to obtain a plurality of same-phase adjacent groups; wherein the step of grouping the single-phase meters with the same phase sequence and a distance less than the grouping distance into the same same-phase adjacent group comprises:
[0037] S1.1, set the same-phase grouping distance r1 of the single-phase meter; Set the count variable And order The initial value of is 0, where Set up an empty array S, The phase sequence is The numbered set of single-phase meters will The elements of are stored in S;
[0038] S1.2. Determine whether S is an empty set. If so, let Number of adjacent groups in the same phase sequence Finish If the single-phase table of the phase sequence is grouped, return to step S1.1 to group the single-phase table of another phase sequence until all the single-phase tables of the phase sequence are grouped; if not, The value of is increased by 1, and the process goes to step S1.3;
[0039] S1.3. Set an empty array and Store the first element S(1) in S and delete S(1) from S; search S for the same All meters whose distances are less than r1 will be stored in and and removed from the set S, and proceed to step S1.4. If there is no electricity meter that meets the conditions, return to step S1.2;
[0040] S1.4. Search in S for All the meters whose distance between any meter is less than r1, store the qualified meters in And remove it from the set S, then clear it first Then store the electricity meters that meet the requirements Repeat step S1.4; if there is no electricity meter that meets the conditions, return to step S1.2.
[0041] Furthermore, for the same-phase adjacent group, judging whether there is a single-phase meter of another phase and any single-phase meter in the same-phase adjacent group at a distance less than the adjustable phase distance, if so, classifying all single-phase meters in the same-phase adjacent group as adjustable-phase single-phase meters, otherwise, judging the next same-phase adjacent group includes:
[0042] S2.1: Set the phase adjustment allowable distance r2, for phase sequence A, set the counting variable k A , and let k A The initial value is 0; set an empty array S AB , S AC ;
[0043] S2.2: Determine k A Is it equal to N A If yes, then the search for the adjustable single-phase table of phase sequence A is completed, and the process returns to step S2.1, and the same search method is performed on other phase sequences in turn until the search for the adjustable single-phase table of all phase sequences is completed; if no, k A The value of is increased by 1, and the process goes to step S2.3;
[0044] S2.3: Sequentially The single-phase table in the search is a single-phase table with a mutual distance less than r2 and an initial phase of B. If a single-phase table that meets the conditions can be found, then All elements in are stored in S AB , S AB It indicates that the single-phase meter with the initial phase sequence of A can adjust the phase sequence to B and enter step S2.4; otherwise, it directly enters step S2.4;
[0045] S2.4: Sequentially The single-phase table in the search is a single-phase table with a mutual distance less than r2 and an initial phase of C. If a single-phase table that meets the conditions can be found, then All elements in are stored in S AC , S AC It indicates that the single-phase meter with the initial phase sequence of A can adjust the phase sequence to C, and returns to step S2.2; otherwise, it directly returns to step S2.2.
[0046] In this embodiment, by presetting the grouping distance, the single-phase meters are first grouped according to the phase sequence and location information, so that the single-phase meters with the same phase sequence and adjacent geographical locations can be approximately grouped as a whole to form a same-phase adjacent group, thereby simplifying the calculation amount of subsequent searches; then, the adjustable phase distance is preset, and the single-phase meters that meet the conditions are divided into adjustable-phase single-phase meters, providing a basis for subsequent model calculations. Moreover, through the division, in the model, only whether the adjustable-phase single-phase meters are phase-adjusted needs to be considered, which greatly simplifies the calculation difficulty.
[0047] In an optional embodiment, the interphase load adjustment complexity includes the comprehensive three-phase unbalance f1, the single-phase meter adjustment total f2 and the single-phase meter adjustment difficulty f3, and its expression is as follows:
[0048] f(S′ all )=w1f1+w2f2+w3f3
[0049] Wherein, w1, w2, w3 are all preset weights, and w1+w2+w3=1; f(S′ all ) is the complexity of phase load adjustment; S′ all It is the collection of phase sequence states of all single-phase meters after phase sequence adjustment in the transformer area.
[0050] In this embodiment, by introducing three key indicators, namely, three-phase imbalance, total adjustment amount of single-phase meter and adjustment difficulty, a multi-dimensional comprehensive evaluation method is provided, which can comprehensively reflect the effect and cost of phase sequence adjustment on the power load balance of the entire substation, making the evaluation more reasonable.
[0051] In an optional embodiment, the comprehensive three-phase unbalance f1 includes the average value of the three-phase unbalance at all measurement moments in a unit time, and its expression is as follows:
[0052]
[0053] Among them, N P is the number of sampling times per unit time; A, B, C are three different phase sequences; P′ A,j , P′ B,j , P′ C,j They are the total power at time j in the A, B, and C phase sequences after phase sequence adjustment.
[0054] In this embodiment, the average value of the three-phase imbalance at all measurement moments within a unit time is taken into account, which can carefully reflect the overall load balance state of the power grid within a period of time. The smaller the three-phase imbalance, the higher the power quality.
[0055] In an optional embodiment, the total amount f2 of single-phase meter adjustment includes the ratio of the number of single-phase meters that undergo phase adjustment to the number of adjustable single-phase meters, and its expression is as follows:
[0056]
[0057] Among them, length(S′ ∑ ) is the set S′ ∑ The number of internal elements; y s is the phase adjustment state of the single-phase meter s. If the single-phase meter s is phase-adjusted, y s is equal to 1, otherwise y s is equal to 0.
[0058] In this embodiment, the total amount of single-phase meter adjustment is represented by directly calculating the ratio of the number of single-phase meters that need to be adjusted to the number of all single-phase meters that meet the adjustment conditions. The ratio can intuitively reflect the size of the adjustment demand. For substations with different numbers of single-phase meters, using the ratio to represent the total amount of adjustment also makes the model more versatile.
[0059] In an optional embodiment, the single-phase meter adjustment difficulty f3 includes the average value of the ratio of the mutual distance of the single-phase meters undergoing phase adjustment to the farthest mutual distance among the adjustable single-phase meters, and its expression is as follows:
[0060]
[0061] Among them, y s is the phase adjustment state of the single-phase meter s; t is the phase adjustment state of the single-phase meter t; d s,t Indicates the distance between single-phase meter s and single-phase meter t; Indicates the number of single-phase meters that have phase modulation The number of combinations of 2 numbers.
[0062] In this embodiment, by calculating the relative distance between the single-phase meter that needs to be adjusted and the single-phase meter that meets the adjustment conditions, the complexity of the adjustment operation can be accurately quantified, which can effectively reduce the physical operation burden during the phase adjustment process.
[0063] In an optional embodiment, the initial phase sequence state of the single-phase meter s is represented by p s =[x A,s ,x B,s ,x C,s ], where if p s =[1,0,0], it means the phase sequence of the single-phase meter is A; if p s =[0,1,0], it means the phase sequence of the single-phase meter is B; if p s =[0,0,1], it means that the phase sequence of the single-phase meter s is C; the phase sequence state of the single-phase meter s after the phase sequence of the load in the substation is adjusted is expressed as p′ s =[x′ A,s ,x′ B,s ,x′ C,s ], then the phase adjustment state y of the single-phase meter s s The expression is as follows:
[0064]
[0065] The phase sequence state representation method of the single-phase meter in this embodiment can clearly and intuitively reflect the current phase sequence state of each single-phase meter. This design simplifies the description and management of the phase sequence state, and is also convenient for mathematical processing and calculation, so that the phase sequence adjustment process can be converted into simple mathematical operations, reducing the calculation complexity and improving the calculation speed and efficiency. In addition, this state representation method can clearly extract which single-phase meters have undergone phase adjustment, and clarify the original phase sequence and the phase sequence after phase adjustment.
[0066] In an optional embodiment, the phase sequence state p′ of the single-phase meter s after the phase sequence of the load in the station area is adjusted s The value of satisfies the following constraints:
[0067] When the single-phase meter s is an adjustable single-phase meter and the initial phase sequence is phase A, if only the single-phase meter of phase B among phases B and C is separated from any single-phase meter in the same phase adjacent group where the single-phase meter s is located by a distance less than the adjustable phase distance, then p′ s The value of is [1,0,0] or [0,1,0]; if the distance between the single-phase meter of phase C and any single-phase meter in the same phase adjacent group where single-phase meter s is located is less than the adjustable phase distance, then p′ s The value of is [1,0,0] or [0,0,1]; if there are single-phase meters in both phases B and C and the distance between them and any single-phase meter in the same phase adjacent group where single-phase meter s is located is less than the adjustable phase distance, then p′ s The value of is [1,0,0] or [0,1,0] or [0,0,1];
[0068] When the single-phase meter s is an adjustable single-phase meter and the initial phase sequence is phase B, if only the single-phase meter of phase A among phases A and C is separated from any single-phase meter in the same phase adjacent group where the single-phase meter s is located by a distance less than the adjustable phase distance, then p′ s The value of is [0,1,0] or [1,0,0]; if the distance between the single-phase meter of phase C and any single-phase meter in the same phase adjacent group where single-phase meter s is located is less than the adjustable phase distance, then p′ s The value of is [0,1,0] or [0,0,1]; if there are single-phase meters in both phases A and C and the distance between them and any single-phase meter in the same phase adjacent group where single-phase meter s is located is less than the adjustable phase distance, then p′ s The value of is [0,1,0] or [1,0,0] or [0,0,1];
[0069] When the single-phase meter s is an adjustable single-phase meter and the initial phase sequence is phase C, if only the single-phase meter of phase A among phases A and B is separated from any single-phase meter in the same phase adjacent group where the single-phase meter s is located by a distance less than the adjustable phase distance, then p′ sThe value of is [0,0,1] or [1,0,0]; if the distance between the single-phase meter of phase B and any single-phase meter in the same phase adjacent group where single-phase meter s is located is less than the adjustable phase distance, then p′ s The value of is [0,0,1] or [0,1,0]; if there are single-phase meters in both phases A and B and the distance between them and any single-phase meter in the same phase adjacent group where single-phase meter s is located is less than the adjustable phase distance, then p′ s The value of is [0,0,1] or [1,0,0] or [0,1,0].
[0070] In this embodiment, by constraining the state of the single-phase meter after the phase sequence of the load in the substation is adjusted, the adjustment direction of the single-phase meter can be limited according to which other phase sequences are near the adjustable phase single-phase meter in the actual project, further ensuring the actual operability of the adjustment plan.
[0071] In an optional embodiment, the step of solving the load phase sequence adjustment model includes solving the load phase sequence adjustment model using a discrete artificial intelligence optimization algorithm.
[0072] In this embodiment, the discrete artificial intelligence optimization algorithm can quickly find a near-optimal solution in large-scale complex problems. Compared with the traditional exhaustive search or simple heuristic algorithm, the discrete artificial intelligence optimization algorithm has a higher convergence speed and global search capability, so it can significantly improve the efficiency of solving the load phase sequence adjustment model and reduce the calculation time. In addition, the artificial intelligence optimization algorithm has global optimization capabilities and can avoid falling into the local optimal solution, thereby finding the global optimal or near-optimal solution. This feature makes the load phase sequence adjustment result more accurate, ensures that the adjusted power grid load distribution is more balanced and reasonable, and improves the stability of power grid operation and the quality of power supply.
[0073] Example 2
[0074] This embodiment proposes a load phase sequence adjustment system taking into account position information, and applies the load phase sequence adjustment method taking into account position information proposed in Embodiment 1, such as Figure 2 , which is a structural diagram of the load phase sequence adjustment system taking into account position information of this embodiment.
[0075] This embodiment provides a load phase sequence adjustment system taking into account position information, including:
[0076] Data acquisition module: used to obtain the location, phase sequence and power data per unit time of the single-phase meter in the substation area;
[0077] The adjustable phase single-phase table division module is used to find the adjustable phase single-phase table from the one-way table based on the phase sequence and position of the single-phase table;
[0078] Load phase sequence adjustment solution solution module: used to construct a load phase sequence adjustment model, solve the load phase sequence adjustment model with the goal of minimizing the complexity of phase-to-phase load adjustment, record the single-phase meter and its phase adjustment status that undergo phase adjustment in the model under the optimal phase-to-phase load adjustment complexity, and obtain the load phase sequence adjustment solution.
[0079] It can be understood that the system of this embodiment corresponds to the method of the above-mentioned embodiment 1, and the options in the above-mentioned embodiment 1 are also applicable to this embodiment, so they will not be described repeatedly here.
[0080] Example 3
[0081] This embodiment uses the load phase sequence adjustment method taking into account the position information proposed in Embodiment 1 to adjust the load phase sequence in a certain area, such as Figure 3 The figure shows the geographical location distribution map of the single-phase meters in this substation.
[0082] In this embodiment, after first querying the geographical location of the single-phase meter, all adjustable single-phase meters among all single-phase meters are searched, as shown in Table 1 below, which is a set of adjustable single-phase meters;
[0083] Table 1 Collection of single-phase meters with adjustment conditions
[0084]
[0085] The load phase sequence adjustment model is constructed and solved with the optimal phase-to-phase load adjustment complexity as the goal. When the single-phase meter 15 is adjusted from phase A to phase B, and the single-phase meters 49, 50, and 51 are adjusted from phase C to phase B, the load adjustment complexity is minimized to 0.3526. At this time, the three-phase imbalance f1 is 0.0519, the total single-phase meter adjustment f2 is 0.1538, and the single-phase meter adjustment difficulty f3 is 0.1469.
[0086] As a comparative experiment 1, the single-phase meter adjustment difficulty f3 of the load phase sequence adjustment model is removed in the comparative experiment 1, and only the three-phase imbalance f1 and the single-phase meter adjustment total f2 are solved, and the solution is obtained: single-phase meter 15 is adjusted from phase A to phase B, and single-phase meters 42, 44, and 49 are adjusted from phase C to phase B. At this time, the three-phase imbalance f1 is 0.0514, and the single-phase meter adjustment total f2 is 0.1538. However, if the single-phase meter adjustment difficulty f3 is calculated at this time, it is 0.6033. It can be seen that although the three-phase imbalance in the comparative experiment 1 is slightly lower than that of this method, the single-phase meter adjustment difficulty is much higher. Figure 3 It can be seen that the distance between the 49 single-phase meter and the 42 and 44 single-phase meters in the control experiment is very far, which increases the difficulty of the transformation of the substation.
[0087] As a comparative experiment 2, single-phase meters No. 33 to 37, which originally did not have the adjustment conditions, were added to S CBIn the solution, the load phase sequence adjustment model is solved to obtain the scheme: single-phase meter 15 is adjusted from phase A to phase B, and single-phase meters 33, 35, and 46 are adjusted from phase C to phase B; at this time, the three-phase unbalance f1 is 0.0512, the total adjustment amount f2 of the single-phase meter is 0.1290, and the adjustment difficulty f3 of the single-phase meter is 0.6006. It can be seen that although the three-phase unbalance is slightly lower than that of this method, there is no B-phase line near the single-phase meters 33 and 35, and single-phase meters that do not meet the adjustment conditions appear in the adjustment scheme. The obtained adjustment scheme is difficult to implement in actual engineering.
[0088] In summary, this method considers whether the location of the single-phase meter is adjustable. The resulting adjustment plan is to find the optimal solution while balancing the three-phase imbalance based on the consideration of the phase adjustment transformation of the substation based on the location of the single-phase meter.
[0089] The accompanying drawings are only used for illustrative purposes and are not to be construed as limiting the present invention;
[0090] It is understandable to those skilled in the art that some well-known descriptions may be omitted in the drawings.
[0091] The terms in the drawings are for illustrative purposes only and should not be construed as limiting this patent;
[0092] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.
Claims
1. A method for adjusting load phase sequence taking into account position information, characterized in that: The following steps are involved: Obtain the location, phase sequence and power data per unit time of the single-phase meter in the substation area; dividing the adjustable phase single-phase table from the one-way table based on the phase sequence and position of the single-phase table; A load phase sequence adjustment model is constructed to evaluate the complexity of inter-phase load adjustment according to the phase adjustment status of the adjustable phase single-phase meter and the power of all single-phase meters per unit time; The load phase sequence adjustment model is solved with the goal of minimizing the complexity of inter-phase load adjustment, and the single-phase meters and their phase adjustment states that undergo phase adjustment in the model under the optimal inter-phase load adjustment complexity are recorded to obtain a load phase sequence adjustment plan. Based on the load phase sequence adjustment plan, load phase sequence adjustment is performed in the substation.
2. The load phase sequence adjustment method taking into account position information according to claim 1, characterized in that: The step of dividing the adjustable phase single-phase table from the one-way table based on the phase sequence and position of the single-phase table includes: Preset grouping distance and adjustable phase distance; The single-phase meters are grouped based on their phase sequences and the grouping distances to obtain a plurality of same-phase adjacent groups; wherein the single-phase meters with the same phase sequence and a distance less than the grouping distance are grouped into the same same-phase adjacent group; For any same-phase adjacent group, determine whether there are single-phase meters in other phases that are separated from any single-phase meter in the same-phase adjacent group by a distance less than the adjustable phase distance. If so, all single-phase meters in the same-phase adjacent group are classified as adjustable-phase single-phase meters. Otherwise, determine the next same-phase adjacent group.
3. The load phase sequence adjustment method taking into account position information according to claim 1, characterized in that: The complexity of interphase load adjustment includes the comprehensive three-phase imbalance f1, the total amount of single-phase meter adjustment f2 and the difficulty of single-phase meter adjustment f3, and its expression is as follows: f(S ′ all )=w1f1+w2f2+w3f3 Wherein, w1, w2, w3 are all preset weights, and w1+w2+w3=1; f(S ′ all ) is the complexity of phase load adjustment; S ′ all It is the collection of phase sequence states of all single-phase meters after phase sequence adjustment in the transformer area.
4. The load phase sequence adjustment method taking into account position information according to claim 3, characterized in that: The comprehensive three-phase unbalance f1 includes the average value of the three-phase unbalance at all measurement moments in a unit time, and its expression is as follows: Among them, N P is the number of sampling times per unit time; A, B, C are three different phase sequences; P A ′ ,j , P B ′ ,j , P C ′ ,j They are the total power at time j in the A, B, and C phase sequences after phase sequence adjustment.
5. The load phase sequence adjustment method taking into account position information according to claim 3, characterized in that: The total amount f2 of single-phase meter adjustment includes the ratio of the number of single-phase meters that undergo phase adjustment to the number of adjustable single-phase meters, and its expression is as follows: Among them, length(S′ ∑ ) is the adjustable single-phase meter set S′ ∑ The number of internal elements; y s is the phase adjustment state of the single-phase meter s. If the single-phase meter s is phase-adjusted, y s is equal to 1, otherwise y s is equal to 0.
6. The load phase sequence adjustment method taking into account position information according to claim 3, characterized in that: The single-phase meter adjustment difficulty f3 includes the average value of the ratio of the mutual distance of the single-phase meters that undergo phase adjustment to the farthest mutual distance among the adjustable single-phase meters, and its expression is as follows: Among them, y s is the phase adjustment state of the single-phase meter s; t is the phase adjustment state of the single-phase meter t; d s,t Indicates the distance between single-phase meter s and single-phase meter t; Indicates the number of single-phase meters that have phase modulation The number of combinations of 2 numbers.
7. The load phase sequence adjustment method taking into account position information according to claim 5 or 6, characterized in that: The initial phase sequence state of the single-phase meter s is represented by p s =[x A,s ,x B,s ,x C,s ], where if p s =[1,0,0], it means the phase sequence of the single-phase meter is A; if p s =[0,1,0], it means the phase sequence of the single-phase meter is B; if p s =[0,0,1], it means that the phase sequence of the single-phase meter s is C; the phase sequence state of the single-phase meter s after the phase sequence of the load in the substation is adjusted is represented by p s ′ =[x A ′ ,s ,x ′ B,s ,x ′ C,s ], then the phase adjustment state y of the single-phase meter s s The expression is as follows:
8. The load phase sequence adjustment method taking into account position information according to claim 7, characterized in that: The phase sequence state p of the single-phase meter s after the phase sequence of the load in the substation is adjusted s ′ The value of satisfies the following constraints: When the single-phase meter s is an adjustable single-phase meter and the initial phase sequence is phase A, if only the single-phase meter of phase B among phases B and C is separated from any single-phase meter in the same phase adjacent group where the single-phase meter s is located by a distance less than the adjustable phase distance, then p s ′ The value of is [1,0,0] or [0,1,0]; if only the distance between the single-phase meter of phase C and any single-phase meter in the same phase adjacent group where single-phase meter s is located is less than the adjustable phase distance, then p s ′ The value of is [1,0,0] or [0,0,1]; if there are single-phase meters in both phases B and C and the distance between them and any single-phase meter in the same phase adjacent group where single-phase meter s is located is less than the adjustable phase distance, then p s ′ The value of is [1,0,0] or [0,1,0] or [0,0,1]; When the single-phase meter s is an adjustable single-phase meter and the initial phase sequence is phase B, if only the single-phase meter of phase A among phases A and C is separated from any single-phase meter in the same phase adjacent group where the single-phase meter s is located by a distance less than the adjustable phase distance, then p s ′ The value of is [0,1,0] or [1,0,0]; if only the distance between the single-phase meter of phase C and any single-phase meter in the same phase adjacent group where single-phase meter s is located is less than the adjustable phase distance, then p s ′ The value of is [0,1,0] or [0,0,1]; if there are single-phase meters in both phases A and C and the distance between them and any single-phase meter in the same phase adjacent group where single-phase meter s is located is less than the adjustable phase distance, then p s ′ The value of is [0,1,0] or [1,0,0] or [0,0,1]; When the single-phase meter s is an adjustable single-phase meter and the initial phase sequence is phase C, if only the single-phase meter of phase A among phases A and B is separated from any single-phase meter in the same phase adjacent group where the single-phase meter s is located by a distance less than the adjustable phase distance, then p s ′ The value of is [0,0,1] or [1,0,0]; If, among the two phases A and B, only the single-phase meter of phase B is separated from any single-phase meter in the same phase adjacent group where single-phase meter s is located by a distance less than the adjustable phase distance, then p s ′ The value of is [0,0,1] or [0,1,0]; if there are single-phase meters in both phases A and B and the distance between them and any single-phase meter in the same phase adjacent group where single-phase meter s is located is less than the adjustable phase distance, then p s ′ The value of is [0,0,1] or [1,0,0] or [0,1,0].
9. The load phase sequence adjustment method taking into account position information according to any one of claims 1 to 6, characterized in that: The step of solving the load phase sequence adjustment model includes solving the load phase sequence adjustment model using a discrete artificial intelligence optimization algorithm.
10. A load phase sequence adjustment system taking into account position information, applied to the load phase sequence adjustment method taking into account position information according to any one of claims 1 to 9, characterized in that: The system comprises: Data acquisition module: used to obtain the location, phase sequence and power data per unit time of the single-phase meter in the substation area; The adjustable-phase single-phase table division module is used to divide the adjustable-phase single-phase table from the one-way table based on the phase sequence and position of the single-phase table; Load phase sequence adjustment solution solution module: used to construct a load phase sequence adjustment model, solve the load phase sequence adjustment model with the goal of minimizing the complexity of phase-to-phase load adjustment, record the single-phase meter and its phase adjustment status that undergo phase adjustment in the model under the optimal phase-to-phase load adjustment complexity, and obtain the load phase sequence adjustment solution.